Relevant bibliographies by topics / Dentin

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  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
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Academic literature on the topic 'Dentin'

Author: Grafiati
Published: 4 June 2021
Last updated: 1 August 2024

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Journal articles on the topic "Dentin"

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Wurdani, Eresha Melati Kusuma, Adioro Soetojo, and Devi Eka Juniarti. "Differences in tensile adhesion strength between HEMA and nonHEMA-based dentin bonding applied on superficial and deep dentin surfaces." Dental Journal (Majalah Kedokteran Gigi) 50, no. 1 (March 31, 2017): 14. http://dx.doi.org/10.20473/j.djmkg.v50.i1.p14-18.

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Background: Improvement in dentistry shows some progresses, due to patients awareness on the importance of dental care. Cervical lesion is the most common phenomenon which oftenly found 46.36% in man and 38.13% in woman. Cervical lesions need composite restoration for treatment to stop the process of tissue damage. The process of adhesion of composite restoration material to the structure of the tooth is not easily separated and it needs optimal function in the oral cavity. Application of dentin bonding agents to attach the composite is needed. Selection of HEMA-based bonding material and Hema free-based bonding material which have a different solvent in their composition, as applied to the dentin superficial and deep dentin, affect the results of debonding test. Debonding test is done to measure the adhesion strength of a bonding material. Purpose: The purpose of this study was to analyze differences in tensile bond strength of dentine bonding HEMA-based and HEMA-free based after application in superficial and deep dentine surfaces. Method: The tooth of the bovine was as samples. A superficial dentine sample was taken from 0.5-1 mm of dentino enamel junction and a deep dentine sample was taken from 0.5 mm culmination of pulp horn. Dentine surface area was equal to p x r2 = (3.14 x 22) = 12.56 mm2. Six samples of HEMA-based bonding was applied to the dentine superficial. Six samples of HEMAfree based bonding was applied to the superficial dentine. Six samples of HEMA-based bonding was applied to the deep dentine. Six samples of HEMA-free based bonding was applied to the deep dentine. Tensile strength was measured using an Autograph AG-10TE. Result: There were differences tensile bond strength of dentine bonding HEMA-based and HEMA-free based after the application on superficial (p=0.000) and deep dentine surfaces (p=0.000). Conclusion: There were differences tensile bond strength of dentine bonding HEMA-based and HEMA-free based after the application on superficial and deep dentine surfaces. The use of dentine bonding materials HEMA-free based were better than HEMA-based after application on different dentine depths.
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Румянцев, В. А., А. Р. Бессуднова, А. В. Блинова, and Н. В. Заблоцкая. "ЭФФЕКТИВНОСТЬ ИМПРЕГНАЦИИ ДЕНТИНА ЗУБОВ НАНОЧАСТИЦАМИ ГИДРОКСИДА МЕДИ-КАЛЬЦИЯ ПРИ ЭКСПЕРИМЕНТАЛЬНОМ ЛЕЧЕНИИ КАРИЕСА." MEDICINE, SCIENCE AND EDUCATION, no. 34 (November 2022): 51–55. http://dx.doi.org/10.56936/18291775-2022.34-51.

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For the prevention of recurrent and secondary caries of teeth, as well as bullets, antiseptic treatment of the carious cavity, dentine adhesives, laser radiation, etc. are used. However, these methods do not allow achieving effective decontamination and obturation of dentine tubules, in which pathogenic microflora can continue to persist. In the experimental treatment of dentin caries using electron microscopy, the effectiveness of a new technique of galvanophoretic nanoimpregnation of dentin with nanoparticles of a complex preparation of copper-calcium hydroxide was studied. Galvanophoresies was performed using an aluminum foil in contact with a copper-containing preparation. After instrumental treatment of the cavity, it is advisable to carry out nanoimpregnation of dentin for 14 days. During this period, 85-90% of the dentine tubules are obturated to an average depth of 800 microns and the dentine is saturated with calcium, which contributes to the restoration of its mineral composition, disturbed as a result of microbial demineralization. The effectiveness of nanoimpregnation of dentin with copper-calcium hydroxide decreases with age of the teeth, as well as with existing carious cavity.
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Rasni, Novia D. P., and Johanna A. Khoman. "Penatalaksanaan Hipersensitivitas Dentin." e-GiGi 9, no. 2 (May 4, 2021): 133. http://dx.doi.org/10.35790/eg.9.2.2021.33885.

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Abstract: Dentin hypersensitivity is one of the most common dental problems. It can be found in both sexes, especially in the elderly. The discomfort or pain experienced in cases of dentin hypersensitivity occurs due to the unprotected surface by enamel in the crown or by cementum in the tooth root area. The characteristic of dentin hypersensitivity is that the pain suffered is acute, sharp but short in the unprotected dentin. This review was aimed to discuss about the etiology, stimulatory transmission mechanisms, and management of dentine hypersensitivity.Keywords: dentin hypersensitivity; pain Abstrak: Hipersensitivitas dentin merupakan salah satu masalah gigi yang paling sering dijumpai, dapat ditemui pada laki-laki maupun perempuan utamanya pada orang yang sudah lanjut usia. Ketidaknyamanan atau rasa ngilu yang dialami pada kasus hipersensitivitas dentin terjadi karena adanya permukaan yang tidak terlindungi oleh email di mahkota atau sementum di daerah akar gigi. Ciri khas hipersensitif dentin yaitu rasa sakit yang diderita bersifat akut, tajam tapi singkat pada dentin yang tidak terlindungi. Penulisan ini bertujuan untuk membahas mengenai etiologi, mekanisme penjalaran rangsang dan tata kelola kasus hipersensitivitas dentin.Kata kunci: hipersensitivitas dentin; rasa ngilu
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Kinney, J. H., S. Habelitz, S. J. Marshall, and G. W. Marshall. "The Importance of Intrafibrillar Mineralization of Collagen on the Mechanical Properties of Dentin." Journal of Dental Research 82, no. 12 (December 2003): 957–61. http://dx.doi.org/10.1177/154405910308201204.

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It is widely held that the hardness and modulus of dentin increase in proportion to the mineral concentration. To test this belief, we measured hardness and modulus of normal dentin and an altered form of dentin without gap-zone mineralization in wet and dry conditions by AFM nanoindentation to determine if the modulus and hardness scale linearly with mineral concentration. Mineral concentrations in the mid-coronal location of the normal and altered dentins were 44.4 vol% and 30.9 vol%, respectively. Surrounding the pulp of the altered dentin was a region of higher mineralization, 40.5 vol%. The indentation modulus of normal dentin was 23.9 (SD = 1.1) GPa dry and 20.0 (SD = 1.0) GPa wet. In mid-coronal regions of the altered dentin, the indentation modulus was 13.8 (SD = 2.0) GPa dry and 5.7 (SD = 1.4) GPa wet. In the more mineralized regions of the altered dentin, the modulus was 20.4 (SD = 1.8) GPa dry and 5.3 (SD = 0.8) GPa wet; the properties of the altered wet dentin did not correlate with mineral concentration. The results of this study raise doubt as to whether mineral concentration alone is a sufficient endpoint for assessing the success or failure of remineralization approaches in restorative dentistry.
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Berahim, Zurairah, Keyvan Moharamzadeh, Adrian K. Jowett, and Andrew Rawlinson. "Evaluation of Osteogenic and Cementogenic Potential of Periodontal Ligament Fibroblast Spheroids Using a Three-DimensionalIn VitroModel of Periodontium." International Journal of Dentistry 2015 (2015): 1–9. http://dx.doi.org/10.1155/2015/605813.

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The aim of this study was to develop a three-dimensionalin vitromodel of periodontium to investigate the osteogenic and cementogenic differentiation potential of the periodontal ligament fibroblast (PDLF) spheroids within a dentin-membrane complex. PDLFs were cultured in both spheroid forms and monolayers and were seeded onto two biological collagen-based and synthetic membranes. Cell-membrane composites were then transferred onto dentin slices with fibroblasts facing the dentin surface and further cultured for 20 days. The composites were then processed for histology and immunohistochemical analyses for osteocalcin, Runx2, periostin, and cementum attachment protein (CAP). Both membranes seeded with PDLF-derived cells adhered to dentin and fibroblasts were present at the dentin interface and spread within both membranes. All membrane-cell-dentine composites showed positive staining for osteocalcin, Runx2, and periostin. However, CAP was not expressed by any of the tissue composites. It can be concluded that PDLFs exhibited some osteogenic potential when cultured in a 3D matrix in the presence of dentin as shown by the expression of osteocalcin. However the interaction of cells and dentin in this study was unable to stimulate cementum formation. The type of membrane did not have a significant effect upon differentiation, but fibroblast seeded-PGA membrane demonstrated better attachment to dentin than the collagen membrane.
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Kumar R., Sarath, Deepti Jawa, Rani Somani, Shipra Jaidka, Oinam Renuka, Mayanglambam Leleesh, Hridya V.G, and Serene MS. "REVIEW ON BIODENTINE - A BIODENTINE DENTINE SUBSTITUTE." International Journal of Advanced Research 10, no. 02 (February 28, 2022): 606–15. http://dx.doi.org/10.21474/ijar01/14245.

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Biodentine is a tricalcium silicate-based cement designed for permanent dentin replacement material and has drawn attention in recent years. Biodentine has been adviced to be used in various clinical applications such as pulp caping, apexification,root perforations, retrograde fillings and dentine replacement. There has been considerable research performed on this material since its launching however, there is scarce number of review articles that collates information and data obtained from these studies. Therefore, this review article was prepared for providing a general picture regarding the characteristics of the material. Biodentine is a good biocompatible and bioactive material. It helps in the protection of underlying pulp by inducing tertiary dentin formation. Unlike other dentin substitutes, Biodentine application does not require any conditioning of the dentin surface. The restoration sealing of Biodentine is micromechanical retention by penetrating into the dentin tubules forming tag-like structures. After its setting, Biodentine can be reshaped like natural dentin. Published clinical trials, histology of human teeth and clinical cases show that Biodentine has a wide spectrum of clinical applications as a permanent bulk dentin substitute in pediatric dentistry and restorative dentistry as a possible replacement material.
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Johnson, Lynn, Sonal GP Pillai, and Palak Upadhyay. "Investigation of Dentinal Tubule Occlusion by a Desensitizing Dentifrice: an in-Vitro Sem Analysis." Journal of Nursing Research,Patient Safety and Practise, no. 34 (June 29, 2023): 11–16. http://dx.doi.org/10.55529/jnrpsp.34.11.16.

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The purpose of this study was to compare patent dentin tubules to in vitro dentin tubules in order to assess the dentin tubule occluding impact of a dentifrice incorporating Pro-Argin Technology (Colgate Sensitive Plus). Methods: The diameter of the dentine tubule was measured using scanning electron microscopy (SEM) on 20 produced dentin discs that were either left untreated or treated with the dentifrice. To evaluate tubule patency, microphotographs were obtained at a 2000x magnification. The dentifrice covered the treated sample, filling the dentinal tubule and decreasing or closing the tubule opening, according to SEM imaging results. Conclusion: According to pertinent statistical analysis, Pro-argin technology efficiently blocked dentinal tubules, making it suitable for use as a dental anti-sensitivity agent.
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DEMARCO, Flávio Fernando, Miriam Lacalle TURBINO, and Edmir MATSON. "COHESIVE STRENGTH OF DENTIN RESISTÊNCIA COESIVA DA DENTINA." Revista de Odontologia da Universidade de São Paulo 11, no. 3 (July 1997): 189–94. http://dx.doi.org/10.1590/s0103-06631997000300007.

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The bond strength of dentin adhesives to dentin has increased after each generation. Although dentin substratum is part of the bonding process, little importance has been given to measure dentin cohesive strength. The aim of this study was to evaluate the cohesive strength of dentin in human canines. Seventeen non carious canines were selected. All of them had been extracted for more than one year. The teeth were ground until dentin square samples with approximately 2 X 2 mm were obtained. They were embedded in acrylic resin and subjected to shear stress, in a Wolpert Machine, at a crosshead speed of 0.5 mm/min. The mean cohesive strength of dentin in shear mode was 33.95 (+-9.72) MPa. The fracture surfaces were observed under a X40 magnification. A finite element analysis was performed to observe the stress distribution as related to the shear test. The failure pattern was compatible with the shear test and also with the stress distribution in the finite element analysis
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Sher, Bryan Martin, Riaan Mulder, and Norbert Gutknecht. "The Photobiomodulation Effect of 940nm Laser Irradiation on Enterococcus faecalis in Human Root Dentin Slices of Varying Thicknesses." Journal of Lasers in Medical Sciences 12, no. 1 (August 30, 2021): e48-e48. http://dx.doi.org/10.34172/jlms.2021.48.

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Introduction: An increase in dentine thickness could result in an inadequate depth of laser energy penetration. This study aimed to evaluate the effect of a 940 nm laser on Enterococcus faecalis through varying thicknesses of human root dentin slices. Methods: Thirty-five dentin slices of root dentin with thicknesses ranging between 500 and 3000 µm were produced. Six experimental groups (500, 1000, 1500, 2000, 2500, and 3000 µm (n=5 each) were lased and the seventh, non-lased group served as the positive control with a dentine thickness of 2000 µm. The slices were inoculated with 2 µL of E. faecalis suspension of 1.5 × 108 E. faecalis cells/mL. All the lased slices were lased from the opposing side of the inoculation. A non-initiated 200 μm bare end fibre at the power of 1 W, in a continuous wave was used. Four doses of laser irradiation of 5 seconds with a side to side movement with the tip held at a 5º angle to the dentine slice were performed. The colony-forming units of E. faecalis were determined and the bacterial photobiomodulation effect analysed using one-way ANOVA with a Bonferroni and Holm post hoc test at a significance level of P>0.05. Results: There were statistical differences between the dentin slices of 500, 1000, and 1500 μm treated with the laser compared to the positive control (P<0.01). However, there were no statistical differences between the lased 2000 and 2500 μm slices compared to the positive control. There was significantly more photobiomodulation of the E. faecalis for the dentine slices of 3000 μm than the positive control (P<0.01). Conclusion: Laser treatment through dentine slices of 2000 μm and thinner significantly reduced bacterial growth. The photobiomodulation effects started to occur in dentine slices thicker than 2500 μm compared to the positive control.
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Oancea, Roxana, Cristian Funieru, Ruxandra Sfeatcu, Delia Berceanu Vaduva, and Adelina Cheveresan. "Evaluation of the Impact Induced by High Dietary Sucrose Concentration and Glucocorticoid Medication on Dentin Formation of Young Rats." Revista de Chimie 70, no. 10 (November 15, 2019): 3714–18. http://dx.doi.org/10.37358/rc.19.10.7631.

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The impact of sucrose and systemic cortisone treatment on the response of dentin was examined in an experimental rat model. After 2 months of a modified diet and/or medication period, the areas of dentin formation and dentinal caries were quantified in the mandibular molars of growing animals. The 60% sucrose diet significantly reduced dentin formation and increased dentinal caries progression. The presence of glucocorticoid medication alone reduced dentin formation. Cortisone medication in combination with sucrose diet further decreased dentin apposition. Rats receiving the control diet positively responded to the dentinal caries by increasing dentin formation to prevent pulpal exposure. The rate of dentine formation was lower in rats with high sucrose diet and predentin area was wider compared to the control group fed normal diet. The enlargement of the predentin region in sucrose diet rats reflects changes in the functionality of the odontoblasts, such as reduction of matrix synthesis and alteration of the mineralization process. These results indicate that the functional alterations in the pulpo-dentinal complex might contribute to dentinal caries progression through systemic mechanism irrespective of the causative factors.
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Dissertations / Theses on the topic "Dentin"

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Toseto, Roberta Mariano [UNESP]. "Influência de uma substância antioxidante na união de materiais resinosos à dentina após a realização de clareamento." Universidade Estadual Paulista (UNESP), 2010. http://hdl.handle.net/11449/89605.

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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
Este estudo analisou a influência do ascorbato de sódio 10% (AS) na formação de tags e camada híbrida em dentina após clareamento dental. Materiais e métodos: Foram testados 6 grupos. GI- Controle: somente restaurações de Resina Composta (RC); GII- Ascorbato de Sódio (AS) + RC; GIII- clareamento com peróxido de carbamida 10% (PC) + RC; GIV- PC + AS + RC; GV- clareamento com peróxido de hidrogênio 35% (PH) + RC; GVI– PH + AS + RC. Após os tratamentos, os dentes foram seccionados e descalcificados. Os cortes foram montados em lâminas de vidro e corados pelo método Brown & Brenn. A análise em microscopia óptica comum (Axiophot) em 400X, evidenciou os tags e camada híbrida formados. Resultados: Os dados foram tabulados, sendo obtidas as respectivas médias para comprimento dos tags e a espessura da camada híbrida: GI- 10 e 3.1μm, GII- 9.2 e 2.4 μm, GIII- 5.4 e 1.5 μm, GIV- 6.8 e 2.1 μm, GV- 5.7 e 1.6 μm, GVI- 7.1 e 2.1 μm. Conclusão: O clareamento dental com PC ou PH prejudica a formação de tags resinosos e camada híbrida. O uso do AS aumentou o comprimento destas estruturas
This study analyzed the influence of 10% sodium ascorbate (SA) on tag and hybrid layer formation in dentin after bleaching. Materials and Methods: Six groups were tested: GI- Control: restoration; GII- Sodium Ascorbate (SA) + restoration; GIII- Bleaching with carbamide peroxide (CP) + restoration; GIV- bleaching with CP + SA+ restoration; GV- bleaching with 35% hydrogen peroxide (HP) + restoration; and GVI- HP + SA + restoration. After treatments, the teeth were sectioned and decalcified. The length of resin tags and thickness of the hybrid layer were analyzed using optical microscopy (Axiophot). Results: The following results were obtained for the groups: GI- 10 and 3.1 μm, GII- 9.2 and 2.4 μm, GIII- 5.4 and 1.5 μm, GIV- 6.8 and 2.1 μm, GV–5.7 and 1.6 μm, GVI-7.1 and 2.1 μm (length of resin tags and thickness of the hybrid layer, respectively). Conclusion: Dental bleaching with CP or HP impairs the formation of resin tags and hybrid layer. The use of SA increases these measures
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Carvalho, Adriana Oliveira. "Efeito do modo de aplicação de sistemas adesivos autocondicionantes na permeabilidade dentinaria." [s.n.], 2009. http://repositorio.unicamp.br/jspui/handle/REPOSIP/287815.

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Orientador: Marcelo Giannini
Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Odontologia de Piracicaba
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Resumo: O objetivo deste trabalho foi avaliar a condutividade hidráulica da dentina após a aplicação de sistemas adesivos em diferentes condições. Selecionaram-se 120 incisivos bovinos cujas raízes foram seccionadas 1 mm abaixo da junção cementoesmalte (JCE) e a polpa coronária removida. Foram realizados preparos para faceta de forma que todo o término ficasse em esmalte e a camada superficial da dentina fosse exposta. Os segmentos coronários preparados foram imersos em solução de EDTA (0,5 M / pH 7.4) por 5 minutos, lavados, colocados em cuba ultra-sônica por 12 minutos e assim, conectados ao dispositivo de medição da condutividade hidráulica (CH). A CH foi medida a uma pressão de 10 psi, antes (permeabilidade máxima) e após (permeabilidade mínima) a aplicação dos seguintes sistemas adesivos: G-Bond / GB(GC Corp.), Clearfil Tri-S-Bond / CTS (Kuraray Med.), Hybrid Coat / HY (Sun Medical), Bond Force / BF (Tokuyama), Adper Easy Bond / AEB (3M ESPE), Silorane / SI (3M ESPE), Clearfil SE Bond / CSE (Kuraray Med.) and Scotchbond Multi-Purpose / SMP (3M ESPE). Todos os adesivos foram aplicados das seguintes formas: 1) de acordo com as instruções dos fabricantes; 2) Duas camadas dos adesivos autocondicionantes de passo único (GB, CTS, HY, BF, AEB) ou o primer + duas camadas do bond para os outros adesivos (SI, CSE e o SMP); e 3) uma camada dos adesivos autocondicionantes de passo único + uma fina camada de resina composta de baixa viscosidade (Filtek Flow, 3M ESPE) ou o primer + uma fina camada da mesma resina composta flow substituindo o bond para os outros adesivos (SI, CSE e o SMP). Os dados obtidos foram submetidos à análise de variância a dois critérios e teste de Tukey (_ = 0,05). Nenhuma diferença estatisticamente significativa foi observada entre os modos de aplicação quanto à habilidade em reduzir a permeabilidade dentinária (p< 0,05). Nenhum dos sistemas adesivos mostrou completo selamento da dentina bovina. O SI mostrou menor permeabilidade quando comparado ao SMP, entretanto ambos não foram diferentes dos demais adesivos. Pode-se concluir que os sistemas adesivos autocondicionantes de passo único testados foram capazes de reduzir a condutividade hidráulica da dentina de modo similar aos sistemas convencional de três passos e autocondicionante de dois passos.
Abstract: The aim of this study was to evaluate the dentin hydraulic conductance (HC) after adhesive system application under different conditions. This study included 120 bovine incisors; their roots were sectioned 1 mm below the cementoenamel junction (CEJ) and the coronal pulp removed. Laminate cavity preparations were made exposing the dentin superficial layer with remaining enamel borderline. The crown segments were treated with an EDTA solution (0.5 M / pH 7.4) for 5 min, rinsed, and ultrasonicated for 12 min. HC was then measured using a hydraulic conductivity apparatus (10 psi) before (maximal permeability) and after (minimal permeabily) bonding procedures considering the following adhesive systems: G-Bond / GB (GC Corp.); Clearfil Tri-S-Bond / CTS (Kuraray Med.); Hybrid Coat / HY (Sun Medical); Bond Force / BF (Tokuyama); Adper Easy Bond / AEB (3M ESPE); Silorane / SI (3M ESPE); Clearfil SE Bond / CSE (Kuraray Med.); and Scotchbond Multi-Purpose / SMP (3M ESPE). All adhesive systems were applied as follows: 1) according to manufacturers' instructions; 2) two coats of all-in-one self-etching adhesives (GB, CTS, HY, BF, AEB), or priming step plus two coats of bond resin for the other systems (SI, CSE and SMP); and 3) one coat of all-in-one self-etching adhesive systems plus a thin layer of a flowable composite (Filtek-Flow, 3M ESPE), or priming step (SI, CSE and SMP) plus a thin layer of the same flowable composite replacing the bonding step. Data were submitted to two-way ANOVA and Tukey's test (_= 0.05). No statistically significant difference was observed among the application modes concerning their ability to reduce dentin permeability (p< 0.05). None of the adhesive systems tested showed a complete sealing of the bovine tooth dentin. SI showed lower permeability when compared to SMP; however, SI and SMP revealed permeability levels similar to those observed for the other systems. In conclusion, the all-in-one self-etching adhesive systems tested were similarly able to reduce dentin HC, when compared to the three-step etch-and-rinse and the two-step self-etching adhesive systems.
Mestrado
Materiais Dentarios
Mestre em Materiais Dentários
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Konno, Alysson Noriyuki Kajishima. "Estudo de metodologias utilizadas na avaliação da resistencia mecanica da união composito-dentina." [s.n.], 2005. http://repositorio.unicamp.br/jspui/handle/REPOSIP/288128.

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Orientador: Mario Alexandre Coelho Sinhoreti
Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Odontologia de Piracicaba
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Resumo: O propósito desse estudo foi avaliar a resistência da união dentina¿compósito restaurador dos sistemas adesivos Clearfil SE Bond (CSEB) e Adper Single Bond (SB), através de 4 tipos de ensaios mecânicos: cisalhamento, tração, microcisalhamento e micro-tração. Para tanto, foram utilizados 52 incisivos bovinos que tiveram as coroas incluídas em resina de poliéster em tubos de PVC de 2cm de diâmetro interno, cujas faces vestibulares ficavam expostas em 1mm para que fosse permitido desgaste com lixas de granulação 180 e 400 sob refrigeração a água para expor o tecido dentinário. Para o ensaio de cisalhamento (CIS), foi delimitada uma área circular de 4mm de diâmetro na qual foram aplicados os sistemas adesivos. Um cilindro de compósito restaurador (Z250) de diâmetro igual ao diâmetro da área de união e altura de 5mm foi construído para o ensaio mecânico. O carregamento foi realizado à velocidade de 0,5mm/min. com o uso de uma tira metálica de 5mm de largura que envolvia todo o corpo-de-prova. Para o ensaio de tração (TR), o corpo-de-prova foi confeccionado com o uso de uma matriz metálica na qual um orifício interno de formato tronco-cônico com base maior de 6mm e menor de 4mm foi preenchido com compósito restaurador (Z250) e aderido na superfície pela base menor. O ensaio mecânico foi realizado à velocidade de 0,5mm/min e o carregamento foi realizado com o uso de um dispositivo metálico que envolvia o corpo-de-prova. Os corpos-de-prova para micro-cisalhamento (µ-CIS) foram realizados com o uso de tubos de Tygon (TGY-030) com diâmetro interno de 0,7mm e altura de 0,4mm na qual foi inserido compósito restaurador (Filtek Flow). O carregamento foi realizado com fio ortodôntico de 0,3mm de diâmetro que envolveu o cilindro de compósito próximo à área de união, à velocidade de 0,5mm/min. O teste de micro-tração (µ-TR) foi realizado com o uso de corpos-de-prova, nos quais se realizou um bloco de compósito restaurador (Z250) com 5mm de altura aderido à superfície dentinária e após seccionados de modo a obter corpos-de-prova em forma de palito com área seccional de 1mm². No ensaio mecânico, realizado à velocidade de 0,5mm/min, esses corpos-de-prova eram fixados em dispositivo metálico ligado á máquina de teste com o uso de cola de cianoacrilato (Super Bonder Gel). Os resultados mostram que o sistema CSEB apresentou valores de resistência maiores e estatisticamente diferentes (p>0,05) quando comparados ao sistema Adper Single Bond (CSEB/CIS=6,35MPa; SB/CIS=3,02MPa; CSEB/TR=12,43MPa; SB/TR=7,11MPa; CSEB/µ-CIS=36,52MPa; SB/µ-CIS=26,39MPa; CSEB/µ-TR=30,10MPa; SB/µ-TR=21,08MPa). O sistema CSEB apresentou falhas mistas/coesivas em dentina em todos os tipos de ensaio mecânico. O sistema SB apresentou falhas adesivas na maioria dos ensaios mecânicos
Abstract: The aim of this study was to evaluate the dentin-restorative composite strength of 2 adhesive systems Clearfil SE Bond (CSEB) and Single Bond (SB) using 4 different tests: Shear , Tensile, Micro-shear and Micro-tensile tests. 52 bovine incisors were used in this study which were cut and embedded in PVC tubes (20mm internal diameter, 40mm height) with polyester resin. Buccal surfaces were flattened with sandpaper grit number 180 and 400 under water refrigeration. For the shear bond (SH) strength tests, a circular area of 5mm in diameter was delimited and adhesive systems were applied according to the manufacturers' instructions. A composite cylinder (Z250) of 4mm diameter and 5mm height were built in the area. The loading occurred on Instron testing machine at crosshead speed of 0.5mm/min. using a metallic tape which evolved the cylinder. The tensile test (TEN) were run used samples made with use of a conical shape - metallic mould with 6mm and 4mm in diameter on the edges. The smaller edge was positioned on the surface and a composite put in its internal portion. The loading were carried out at crosshead speed of 0.5mm using a metallic device which evolved the sample. The microshear tests (µ-SH) were carried out using composite samples of 0.7mm in internal diameter in 0,4mm height, built by the use of Tygon tubes (TGY-030). Loading were carried out at crosshead speed of 0.5mm using an orthodontic wire loop (0.3mm). The micro-tensile tests (µ-TEN) were run using sticks with 1mm² of cross seccional area. These sticks were adhered to an testing device using cyanoacrilate glue (Super Bonder Gel) and tested using an Instron testing machine at crosshead speed of 0.5mm/min. Data showed that CSEB bonding system had higher values with statistical significance for all tests compared to SB bonding system (p>0.05) (CSEB/SH=6.35MPa; SB/SH=3.02MPa; CSEB/TEN=12.43MPa; SB/TEN=7.11MPa; CSEB/µ-SH=36.52MPa; SB/µ-SH=26.39MPa; CSEB/µ-TEN=30.10MPa; SB/µ-TEN=21.08MPa). The CSEB showed cohesive and mixed failure for all tests. SB bonding system showed adhesive failure for the most tests
Doutorado
Materiais Dentarios
Materiais Dentarios
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4

Menezes, Maria Jose Lorena de. "Avaliação da resistencia de união de sistemas adesivos de dupla-presa, fotoativados e autopolimerizavel indicados para cimentação de peças proteticas." [s.n.], 2005. http://repositorio.unicamp.br/jspui/handle/REPOSIP/287826.

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Orientador: Marcelo Giannini
Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Odontologia de Piracicaba
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Resumo: O propósito deste estudo in vitro foi avaliar a influência de diferentes sistemas de cimentação que utilizam adesivos dentinários fotoativáveis, de duplapresa e autopolimerizável na resistência à tração (TR) de restaurações indiretas em compósito no substrato dentinário. Trinta e seis terceiros molares extraídos e com tecido dentinário sadio foram seccionados perpendicularmente ao seu longo eixo, na região do terço oclusal da porção coronária com um disco diamantado dupla face e abrasionados com lixa de carboneto de silício (SiC) de granulações 400 e 600, expondo uma superfície dentinária plana de profundidade média sem remanescente de esmalte, observado através do critério visual. Os dentes foram divididos aleatoriamente em seis grupos experimentais de acordo com os sistemas de cimentação (n=6): Grupo 1 - Single Bond/3M-ESPE (SB) e Grupo 2 Scotchbond Multipurpose Plus/3M-ESPE (SBMP), em associação com o cimento resinoso Rely X/3M-ESPE (RX); Grupo 3 - Prime & Bond NT/Dentsply (PB), e Grupo 4 - Prime Bond NT + Self-Cure Activator/Dentsply (PBA), associado ao cimento resinoso Enforce/Dentsply (EN); Grupo 5 - Clearfil SE Bond/Kuraray (CSB) e Grupo 6 - ED Primer/Kuraray (ED), em associação com o cimento resinoso Panavia F/Kuraray (PF). Após a aplicação dos sistemas adesivos de acordo com as recomendações dos fabricantes, foram fixados discos de compósito Clearfil APX (Kuraray) com aproximadamente 2 mm de espessura, com os respectivos cimentos resinosos. Os grupos tiveram os adesivos fotoativados previamente (1, 3, 5) e após a cimentação por 40 segundos. Nos grupos 2, 4 e 6 foram utilizados os adesivos duais e o autopolimerizável sem fotoativação inicial e todo sistema fotoativado por 40 segundos apenas após a fixação. Foram realizadas secções paralelas ao longo eixo das amostras nos sentidos vestíbulolingual (VL) e mésio-distal (MD), originando espécimes em forma de paralelepípedo com área de secção transversal de aproximadamente 0,8 mm2. Quatro espécimes, de cada amostra foram testados em um dispositivo para microtração acoplado em Máquina Universal de Ensaio (4411 Instron), com velocidade de 0,5 mm/min. Os resultados obtidos foram expressos em MPa e submetidos à Análise de Variância e ao Teste de Tukey (5%). Os valores médios de TR (MPa) foram os seguintes: Grupo 1 (SB/RX) = 26,74 ± 7,44 ab; Grupo 2 (SBMP/RX) = 32,89 ± 6,16 a; Grupo 3 (PB/EN) = 26,11 ± 4,48 ab; Grupo 4 (PBA/EN) = 25,30 ± 6,42 ab; Grupo 5 (CSB/PF) = 16,82 ± 5,52 bc e Grupo 6 (ED/PF), = 11,20 ± 6,79 c. O grupo 2 (SBMP/RX) apresentou maior TR que os grupos 5 e 6, os quais utilizaram adesivos autocondicionantes. Na comparação entre sistemas adesivos de mesmo fabricante e com o mesmo agente de fixação resinoso, não houve diferença significativa entre eles, exceto para os materiais do fabricante Dentsply
Abstract: The purpose of this study in vitro was to evaluate the tensile bond strength (µTBS) of light-, self- and dual-cured dentin adhesive systems using foundation of composite blocks with resinous agents. Thirty-six third molars caries-free were extracted and sectioned perpendicully to the long axis, in the third occlusal area of the coronary portion with a diamond disk of high concentration and scorched with 400 and 600 grit SiC, exposing a surface dentinária plane of medium depth without enamel remainder, observed through the visual criteria. The teeth were randomly divided into six experimental groups accorded with the foundation systems (n=6): Group 1-Single Bond/3M-ESPE (SB) and Group 2-Scotchbond Multipurpose Plus/3M-ESPE (SBMP), in association with the resinous cement Rely X/3M-ESPE (RX); Group 3-Prime & Bond NT/Dentsply (PB), and Group 4 Prime & Bond NT + Self-cure Activator/Dentsply (PBA), associated the resinous cement Enforce/Dentsply (EN); Group 5-Clearfil SE Bond/Kuraray (CSB) and Group 6 ED Primer/Kuraray (ED), in association with the resinous cement Panavia F/Kuraray (PF). After the application of the systems according with the manufacturer's instruction, composite blocks Clearfil APX (Kuraray) were fastened with approximately 2 mm thick, with the resinous cement respective. The groups 1, 3 and 5 had the adhesive light-cured previously and after the foundation for 40 seconds. In the groups 2,4 and 6 were used the dual adhesive without initial lightactivated and all light-cured system for 40 seconds, only after the foundation. The samples were vertically, buccal-lingual (VL) and mesiodistal (MD) sectioned, resulting specimens in form of toothpicks with a cross-sectional area of approximately 0,8 mm2. Four specimens from each sample were tested in a microtensile device coupled in an universal testing machine (4411 Instron), at a crosshead speed of 0.5 mm/min. The results were expressed in MPa and statistically analysed by analysis of variance (only facto r) and Tukey test (5%). The medium values of µTBS (MPa) were the following: Group 1 (SB/RX) = 26.74 ± 7.44 ab; Group 2 (SBMP/RX) = 32.89 ± 6.16 a; Group 3 (PB/EN) = 26.11 ± 4.48 ab; Group 4 (PBA/EN) = 25.30 ± 6.42 ab; Group 5 (CSB/PF) = 16.82 ± 5.52 bc and Group 6 (ED/PF), = 11.20 ± 6.79 c. In the medium values of TR the G4 had lower rank than the other groups, excepted to the observed in the G6. The group 2 (SBMP/RX) showed larger µTBS than the groups 5 and 6, which used self-etching adhesive. In comparison among adhesive systems from the same manufacturer and with the same resin cement, there was not significant difference among them, except for the products of Dentsply Company
Mestrado
Dentística
Mestre em Clínica Odontológica
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5

Al, Kuwari Ohoud Mayouf. "Effects of temporary cement on the bond strength of resin luting cements to dentine." Thesis, Click to view the E-thesis via HKUTO, 2008. http://sunzi.lib.hku.hk/hkuto/record/B41651194.

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6

Cederlund, Andreas. "Dentin surface conditioning : the role of collagen in dentin bonding /." Stockholm, 2001. http://diss.kib.ki.se/2001/91-7349-052-0/.

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7

Sá, Renata Bacelar Cantanhede de 1981. "Estudo da união dentina-sistemas adesivos que não contém HEMA = avaliação do selamento dentinário, micropermeabilidade e da resistência de união à dentina imediata e à longo prazo = Adhesion study of dentin-HEMA-free adhesive systems : evaluation of dentin sealing, micropermeability and immediately and long-term dentin bond strength." [s.n.], 2015. http://repositorio.unicamp.br/jspui/handle/REPOSIP/287799.

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Orientador: Marcelo Giannini
Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Odontologia de Piracicaba
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Resumo: Este estudo avaliou o efeito de agentes cross-linking e a utilização de sistemas adesivos (SA) que não contém o monômero HEMA. No capítulo 1 foram avaliadas a resistência de união (RU) e o selamento dentinário (SD) após 24 horas e 6 meses de armazenamento em água. Para RU, foram avaliados 4 SA: um autocondicionante e um convencional contendo o monômero HEMA (Scotchbond Universal/SU e Prime & Bond Elect/PB), um autocondicionante e um convencional sem HEMA (G-Aenial/GA e All-Bond 3/AB) respectivamente. Cada SA foi subdividido em grupos baseados na biomodificação da dentina: controle (sem aplicação de agentes cross-linking), glutaraldeído 5% e proantocianidina 6,5% (PA). Após a aplicação dos adesivos com ou sem o uso de agentes cross-linking e aplicação do compósito, os dentes foram seccionados para obtenção de espécimes, os quais foram avaliados com o teste de microtração. O agente cross-linking que produziu os melhores resultados (PA) foi selecionado para o estudo de SD. Os espécimes foram preparados da mesma forma como descrito anteriormente. As mensurações de permeabilidade dentinária (PD) foram realizadas com a simulação da pressão pulpar através de uma coluna de água de 140 cm em 5 tempos (PD mínima: P min, PD máxima: P máx, PD após o uso do PA: PPA, PD após aplicação dos SA: PSA e PD após 6 meses: Parmazenado). Para o grupo controle, a mensuração difere na remoção da etapa correspondente a PPA, continuando com PSA e Parmazenado, respectivamente. No capítulo 2 foram avaliadas a RU, SD e micropermeabilidade de 4 SA: um convencional contendo HEMA (Adper Single Bond 2/SB), um adesivo de 3 passos que não contem HEMA no solução adesiva hidrófoba (AB) e dois autocondicionantes sem HEMA (GA e BeautiBond/BB). Os dentes foram preparados da mesma forma descrita no primeiro capítulo. A micropermeabilidade foi avaliada através da infiltração do corante amarelo de lúcifer na camada híbrida. Todas as metodologias foram avaliadas após 24 horas e 1 ano de armazenamento em saliva artificial. As mensurações de SD foram expressas em %. Os dados foram analisados com metodologia de modelos mistos para medidas repetidas para o primeiro capítulo e ANOVA 2 fatores e teste de Tukey (?=0,05). A RU produzida por PB, SU e AB não apresentou diferença entre eles e GA apresentou os menores valores em 24 horas. Todos SA apresentaram maiores RU com a aplicação do agente cross-linking PA em 24 horas, independentemente de possuírem HEMA na composição. Após armazenamento por 6 meses, SU e AB apresentaram redução da RU. PA e SA reduziram a permeabilidade da dentina e da interface dentina-resina, respectivamente. No segundo capítulo, AB apresentou maior RU seguido de SB e dos autocondicionantes (BB e GA) em 24 horas. GA apresentou o menor valor de RU após um ano, pois teve redução com o armazenamento. No SD em 24 horas, SB e AB selaram a dentina como a Pmin, enquanto BB não apresentou a mesma capacidade, porém manteve-se estável por um ano. Na avaliação da micropermeabilidade, ausência do HEMA não influenciou os resultados. Os resultados sugerem que a aplicação apenas do agente cross-linking PA pode produzir o selamento da dentina e aumentar a RU. Na segunda parte do estudo, o adesivo AB mostrou os melhores resultados nas análises de RU, SD e micropermeabilidade
Abstract: This study evaluated the effects of cross-linking agents and adhesive systems (AS) that not contain the monomer HEMA. In the chapter 1 the microtensile bond strength (BS) and dentin sealing (DS) after 24 hours and 6 months of water storage were evaluated. For BS teste, 4 groups AS were evaluated: a self-etch and one total-etch HEMA-containing adhesives (Scotchbond Universal/SU and Prime & Bond Elect/PB), one self-etch and one total-etch HEMA-free adhesives (G-Aenial/GA and All-Bond 3/AB). Each AS was divided into sub-groups based on dentin biomodification: control (no cross-linking agent application), 5% glutaraldehyde and 6.5% proanthocyanidin (PA). After adhesives application with or not cross-linking agent use, teeth were sectioned to obtain specimens, which were evaluated in microtensile bond strength test. The most promising dentin biomodification strategy (PA) was selected for DS study. The specimens were prepared in the same way as previous described. Permeability (PD) measurements study was carried out using a simulated pulpal pressure of 140 cm water column at 5 times of evaluation (minimum PD: Pmin, maximum PD: Pmax, PD after PA: PPA, PD after AS application: PAS and PD after 6 months: Pstored). For the control group, the measurements differ from PPA removal, continuing with PAS and Pstored, respectively. In the chapter 2, BS, DS and micropermeability of 4 AS: one total-etch HEMA-containing (Adper Single Bond 2/SB), one three-step etch-and-rinse adhesive that does not contain HEMA in hydrophobic solution (AB) and two self-etch HEMA-free (GA and BeautiBond/BB). The teeth were prepared in the same way as described in the chapter one. For micropermeability analysis the yellow lucifer was used and detected its penetration into the hybrid layer. All methods were tested after 24 hours and after 1 year of artificial saliva storage. DS measurements were expressed as %. The data were submitted to multiple comparisons using PROC MIXED for chapter one and two-way ANOVA and by Tukey¿s test (?=0.05) for chapter two. The BS of PB, SU and AB did not differ among them and GA showed the lowest values at 24 hours. PA cross-linking agent increased the BS for all at 24 hours, regardless the presence of HEMA. Storage for 6 months significantly decreased the BS for SU and AB. PA and AS decrease the permeability of the dentin and dentin-resin interface, respectively. In the chapter two, AB showed the highest values BS followed by SB and self-etch adhesives (BB and GA) at 24 hours. GA showed the lowest BS after one year because it was reduced. For DS, SB and AB sealed the dentin as Pmin, while BB and did not present the same ability, however kept stable after one year. The micropermeability revealed that the absence of HEMA did not influence the outcomes. Results suggested that PA cross-linking application alone was able to seal the dentin and increase the BS. In the second chapter, AB adhesive showed the best results in BS, DS and micropermeability analyses
Doutorado
Materiais Dentarios
Doutora em Materiais Dentários
2011/11415-1, BEPE 2013/02386-3
FAPESP
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8

Arias, Vanessa Gallego. "Determinação do numero de dentes, palitos e influencia da localização dos palitos na dentina para o ensaio de microtração." [s.n.], 2007. http://repositorio.unicamp.br/jspui/handle/REPOSIP/289753.

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Orientadores: Luiz Andre Freire Pimenta, Glaucia Bovi Ambrosano
Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Odontologia de Piracicaba
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Resumo: Os objetivos deste trabalho foram determinar o número ótimo de dentes (tamanho da amostra), número de palitos (tamanho da parcela) e a influência da localização dos palitos na dentina para o ensaio de Microtração. Foram utilizados 80 dentes bovinos, os quais apresentaram as superfícies vestibulares coronárias desgastadas, para a exposição dentinária. Os dentes foram divididos, aleatoriamente, em dois grupos (n=40). Os sistemas adesivos utilizados foram o Single Bond (SB- G1) e Tyrian SPE /One Step Plus (TY- G2). Os dentes foram restaurados com resina composta Filtek Z-250, formando um bloco com dimensões de 4 mm de largura, 6 mm de comprimento e 4 mm de altura, sendo posteriormente seccionados em cortadeira metalográfica, obtendo-se palitos com aproximadamente 0.8 mm2 de área de interface adesiva (dente/resina), totalizando 12 palitos por dente. Os palitos foram fixados a uma máquina Universal de Ensaio para a obtenção dos valores de união, em MPa, com velocidade de avanço de 0,5mm/min. A partir do delineamento inteiramente ao acaso, com 40 repetições por sistema adesivo e 12 palitos por dente, a análise de variância foi realizada e os cálculos das respectivas médias e desvios-padrão. Para a determinação do número de repetições (dentes), o poder do teste foi calculado em função do número de dentes. Adicionalmente, diferentes tabelas foram obtidas através da simulação da variação entre as médias dos grupos, adotando-se 5, 10, 15, 20, 25, 30, 35 e 40% de variação inter-grupos. Também foi estipulado o Coeficiente de Variação do experimento, ou variação intra-grupos, em 10, 20 e 30% e o mesmo procedimento, citado acima, foi realizado. Para a determinação do número de palitos por dente (tamanho da parcela), 12 diferentes simulações (tamanhos) foram criados a partir dos valores originais, através da exclusão aleatória de 1 palito a cada vez que a ANOVA foi realizada até a permanência de apenas 1 palito por dente. O ponto de máxima curvatura modificado, proposto por Méier & Lessman (1971) foi calculado. Adicionalmente, a mesma metodologia foi aplicada, utilizando-se 20 e 10 dentes por grupo. Já para a análise da região dentinária foi aplicada a Análise de Variância em parcela subdividida e teste de Tukey, para a verificação das possíveis diferenças regionais e suas interações. Os resultados demonstraram que a utilização de 6 dentes por grupo presentou um poder de 88%. Entretanto, este número pode variar em função do CV e da diferença entre as médias dos grupos. Já para o tamanho ideal de parcela obtido foi de 7 palitos por dente, independente do número de unidades experimentais. Com relação à localização dos palitos na dentina, os resultados demonstraram diferença estatística entre os palitos nas diferentes linhas (p=0,005) e entre as colunas (p=0,00001). Também houve a interação entre sistema adesivo e linha (p=0,019). O teste de Tukey demonstrou que tanto para o sistema adesivo SB quanto para o TY os melhores resultados foram encontrados nos palitos centrais. Concluiu-se o número mínimo de dentes foi de 6 com 7 palitos por dente, utilizando os palitos centrais da área de união
Abstract: The objectives of this study were to determine the ideal number of teeth (sample size), number of beams per tooth (plot size) and the influence of the beams location on the dentin surface for microtensile testing-MT. Eighty bovine teeth were selected and the dentin was flat exposed. The teeth were randomly divided in two groups (n=40), using the adhesive systems: Single Bond (SB- G1) and Tyrian/One Step Plus (TY- G2). A â?¿crownâ?? was done with composite resin Filtek Z-250, presenting 4 mm width, 6 mm length and 4 mm high. The specimens were sectioned, at a metalographic machine, in 12 beams with 0,8mm2 area interface (dentin/resin). The beams were attached in a Universal Machine and the MT was performed (0.5mm/min) and the bond strength values expressed in MPa. Using the study design random model, with 40 repetitions per group and 12 beams per tooth, the one-way ANOVA was applied and the means and standard deviation were obtained. To determine the optimal sample size, the powerâ?¿s test was calculated. Additional values were simulated decreasing the difference between the groups means, using 5, 10, 15, 20, 25, 30, 35 and 40% (inter-tooth variability). Different CV were used (10, 20 and 30%) and the same procedures describes above were performed. For the analysis of the plot size, 12 different experimental unit sizes were created from the original values by excluding randomly 1 beam every time when one-way ANOVA was performed until only 1 beam per tooth was left, using 40, 20 and 10 teeth per group (EU). The experimental coefficients of variation (CVexp) were calculated and a regression function was estimated. The maximum curvature point was calculated from the formula proposed by Meier & Lessman (1971). For the dentin region, the Split pot analysis and Tukeyâ?¿s test were applied to analyze the regional influence and the possible interactions. The results demonstrated that using 6 teeth, the power arranged 88%. But this number may variety depending CV and the means between groups. The optimal plot size was obtained with 7 beams per tooth independently of the EU. The regional analysis demonstrated statistical significant differences between rows (p=0.005) and columns (p=0.00001). The interaction between adhesive system and rows was statistical significant (p=0.019). The Tukeyâ?¿s test demonstrated that highest bond strength values were to the central beams for both adhesive systems. The conclusion of the study was the optimal sample size was 6 teeth per group, presenting 7 beams per tooth, using the central beams
Doutorado
Dentística
Doutor em Clínica Odontológica
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9

Coutinho, Margareth da Silva. "Avaliação da adaptação à dentina de vários agentes de proteção com ou sem sistemarestaurador adesivo, em função de diferentes tratamentos da superfície dentinária." Universidade de São Paulo, 2000. http://www.teses.usp.br/teses/disponiveis/25/25131/tde-03072001-135807/.

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Este estudo quantificou micrometricamente o índice de adaptação à dentina (presença ou ausência de fenda interfacial) de vários agentes protetores à base de hidróxido de cálcio de ativação química - Dycal e de luz visível - Prisma VLC Dycal e Ultra-Blend® plus e cimento de ionômero de vidro convencional - Ketac Bond e fotoativado - Vitrebond; associados a diferentes tratamentos de superfície dentinária, com e sem a presença de sistema restaurador adesivo (Primer & Bond 2.1 + TPH Spectrum). Os tratamentos dentinários foram jatos de ar/água, condicionamento com ácido poliacrílico a 25% por 10s e ácido fosfórico a 37% por 15s. Foram utilizados 200 dentes, os quais numa metade foi desgastado o esmalte e os preparos realizados em dentina e na outra metade repetiu-se o preparo cavitário envolvendo esmalte e dentina. Cavidades tipo classe V foram realizadas com 3mm de diâmetro e 0,8mm de profundidade em dentina e 0,8mm quando envolvido o esmalte. Após o preenchimento da cavidade, os corpos-de-prova foram incluídos em resina epóxica e seccionados longitudinalmente no sentido vestíbulo-lingual. Foram obtidas réplicas em negativo utilizando-se material de moldagem à base de polivinil siloxana (Aquasil), para a avaliação da desadaptação à dentina, por meio de microscópia de luz refletida em campo escuro. Os dados obtidos microscopicamente foram submetidos aos Testes de Kruskal-Wallis e as comparações múltiplas pelo Teste de Dunn. Os resultados demonstraram que quando comparados o comprimento e a largura da desadaptação à dentina dos agentes protetores, entre as condições experimentais com e sem a presença do sistema restaurador adesivo, o cimento de ionômero de vidro fotopolimerizável Vitrebond obteve os melhores resultados, sobrepujando, inclusive, o Ketac Bond ativado quimicamente. Numa posição intermediária vêm o Ultra-Blend® plus e o cimento de hidróxido de cálcio auto-ativado Dycal e, por último, o cimento de hidróxido de cálcio fotopolimerizável Prisma VLC Dycal, que apresentou a maior desadaptação.
The present study evaluated the length and width of interface gaps between dentin and the following lining materials: chemically cured Dycal Advanced Formula II and light cured Prisma VLC Dycal and Ultra-Blend® plus calcium hydroxide bases; chemically cured Ketac Bond and light cured Vitrebond glass ionomer cements. Dentin cavities prepared in human teeth were pre-treated with only an air/water Spray or with a 25% Polyacrylic acid solution for 10s, or a 37% Phosphoric acid solution for 15s. One half of cavities were prepared in dentin (3mm wide, 0.8mm deep) and have been filled with only the linning materials. The other half of the cavities were enamel dentin cavities had a 0.8mm with enamel layer, 3mm wide, 0.8mm deep below the dentinoenamel junction. Theses cavities received a layer of lining material have then been treated with an adhesive system an restored with a composite resin. In order to access the dentinal interfacial adaptation, the specimens were sectioned longitudinally in buccal to lingual direction thorough the center of the restorations. Low viscosity polyvinyl siloxane impression material (Aquasil) was used to obtain negative replicas. The replicas were examined with a Zeiss Photomicroscope and the length and width of the gaps were measured. The values were submitted to Kruskall Wallis Test and Multiple Comparation Dunn Test. Results demonstrated that, on the experimental conditions used, the glass ionomer cements obtained the best results, specially the Vitrebond. The Ultra-Blend plus and Dycal, showed an intermediary position. Prisma VLC Dycal showed the powerest adaptation.
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Yiu, Kar-yung Cynthia. "Fluid transport across bonded dentin interfaces." Click to view the E-thesis via HKUTO, 2006. http://sunzi.lib.hku.hk/hkuto/record/B36841201.

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Books on the topic "Dentin"

1

International, Conference on Dentin/Pulp Complex (4th 2001 Kazusa Japan). Dentin/Pulp Complex: Proceedings of the International Conference on Dentin/Pulp Complex 2001. Chicago: Quintessence Publishing, 2002.

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Munksgaard, E. C. Binding af plastfyldningsmaterialer til dentin. København: E.C. Munksgaard], 1986.

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International Conference on Dentin/Pulp Complex (1995 Chiba, Japan). Dentin/pulp complex: Proceedings of the International Conference on Dentin/Pulp Complex 1995 and the International Meeting on Clinical Topics of Dentin/Pulp Complex. Edited by Shimono Masaki 1945-, Bergenholtz Gunnar, and International Meeting on Clinical Topics of Dentin/Pulp Complex (1995 : Chiba, Japan). Tokyo: Quintessence Publishing Co., 1996.

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International, Conference on Dentin/Pulp Complex (1995 Chiba Japan). Dentin/pulp complex: Proceedings of the International Conference on Dentin/Pulp Complex 1995 and the International Meeting on Clinical Topics of Dentin/Pulp Complex. Tokyo: Quintessence Publishing Co., 1996.

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Tam, Laura Eva. Fracture toughness and the dentin-composite interface. [Toronto: s.n.], 1993.

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Giovanni, Ferrari Marco Adolfo, ed. Bonding to dentin: Mechanism, morphology and efficacy of bonding resin composites to dentin in vitro and in vivo. [S.l: s.n.], 1995.

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Breisgau, Universität Freiburg im, ed. Auswirkungen der Eindrehstärke von Wurzelkanalschrauben auf das Dentin. [s.l.]: [s.n.], 1988.

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Caldwell, Richard E. Investigations into the factors affecting the shear bond strength of multiple component and single bottle dentin bonding systems to dentin. [Toronto: Faculty of Dentistry, University of Toronto], 2000.

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Chan, Anabel Rose. Studies on the effects of acids on dentin bonding. [Toronto: Faculty of Dentistry, University of Toronto], 1994.

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Kontturi-Närhi, Vuokko. Dentin hypersensitivity: Factors related to the occurrence of pain symptoms. Kuopio: University of Kuopio, 1993.

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Book chapters on the topic "Dentin"

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Qin, Chunlin, and Jian Q. Feng. "Dentin." In Mineralized Tissues in Oral and Craniofacial Science, 135–41. West Sussex, UK: John Wiley & Sons, Inc.,, 2013. http://dx.doi.org/10.1002/9781118704868.ch16.

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Healy, K. E. "Dentin and enamel." In Handbook of Biomaterial Properties, 24–39. Boston, MA: Springer US, 1998. http://dx.doi.org/10.1007/978-1-4615-5801-9_3.

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de Roos, Joanne, Carline van den Breemer, Jappe Buijs, and Marco Gresnigt. "Immediate dentin sealing." In TP topics 2013-2014, 96–99. Houten: Bohn Stafleu van Loghum, 2014. http://dx.doi.org/10.1007/978-90-368-0820-0_16.

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Nakashima, Misako, and George T. J. Huang. "Pulp and Dentin Regeneration." In Stem Cells in Craniofacial Development and Regeneration, 461–84. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2013. http://dx.doi.org/10.1002/9781118498026.ch26.

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Taha, Sahar. "Introduction to Dentin Hypersensitivity." In Clinician's Guide to the Diagnosis and Management of Tooth Sensitivity, 1–8. Berlin, Heidelberg: Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-642-45164-5_1.

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Bamise, Cornelius Tokunbo. "Diagnosis of Dentin Hypersensitivity." In Clinician's Guide to the Diagnosis and Management of Tooth Sensitivity, 41–50. Berlin, Heidelberg: Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-642-45164-5_4.

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Krstić, Radivoj V. "Dentin and Odontoblasts. Cementum." In General Histology of the Mammal, 230–31. Berlin, Heidelberg: Springer Berlin Heidelberg, 1985. http://dx.doi.org/10.1007/978-3-642-70420-8_113.

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Nazzal, Hani, and Monty S. Duggal. "Defects of Dentin Development." In Craniofacial and Dental Developmental Defects, 97–111. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-13057-6_7.

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Soxman, Jane Ann, Patrice Barsamian Wunsch, and Christel M. Haberland. "Anomalies of Dentin Formation." In Anomalies of the Developing Dentition, 123–32. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-030-03164-0_8.

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Pozos-Guillén, Amaury, and Héctor Flores. "Dentin-Pulp Complex Regeneration." In Current Advances in Oral and Craniofacial Tissue Engineering, 159–81. Boca Raton : CRC Press, [2020]: CRC Press, 2020. http://dx.doi.org/10.1201/9780429423055-11.

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Conference papers on the topic "Dentin"

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Butler, William T., Jan C. Brunn, and Chunlin Qin. "IDENTIFICATION OF DENTIN SIALOPHOSPHOPROTEIN IN DENTIN ECM." In 3rd International Conference on Osteopontin and SIBLING (Small Integrin-Binding Ligand, N-linked Glycoprotein) Proteins, 2002. TheScientificWorld Ltd, 2002. http://dx.doi.org/10.1100/tsw.2002.325.

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Chun, Keyoung Jin, Hyun Ho Choi, and Jong Yeop Lee. "A Comparative Study of Mechanical Properties of Tooth Reconstruction Materials." In ASME 2013 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/imece2013-63106.

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Tooth reconstruction materials are used to reconstruct damaged teeth as well as to recover their functions. In this study, the mechanical properties of various tooth reconstruction materials were determined using test specimens of identical shape and dimension under the same compressive test condition; the hardness values of them were obtained from previous studies and compared with those of enamel and dentin. Amalgam, dental ceramic, dental gold alloy, dental resin, zirconia and titanium were processed as tooth reconstruction material specimens. For each material, 10 specimens having a of 3.0 × 1.2 × 1.2 mm (length × width × height) were used. The stresses, strains, and elastic moduli of amalgam, dental ceramic, gold alloy, dental resin, zirconia, and titanium alloy were obtained from the compressive test. The hardness values of amalgam, dental ceramic, gold alloy, dental resin, zirconia, and titanium alloy were obtained from the references [14–19]. And, the stresses, strains, elastic moduli, and the hardness values of enamel and dentin were obtained from the reference [13]. The mechanical role of enamel is to crush food and protect dentin because of its higher wear resistance, and that of dentin is to absorb bite forces because of its higher force resistance. Therefore, the hardness value should be prioritized for enamel replacement materials, and mechanical properties should be prioritized for dentin replacement materials. Therefore, zirconia and titanium alloy were considered suitable tooth reconstruction materials for replacing enamel, and gold alloy, zirconia, and titanium alloy were considered suitable tooth reconstruction materials for replacing dentin. However, owing to the excessive mechanical properties and hardness values of zirconia and titanium alloy, these may show poor biocompatibility with natural teeth. Thus far, no tooth reconstruction material satisfies the requirements of having both a hardness value similar to that of enamel and mechanical properties similar to those of dentin.
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Chun, K. J., C. Y. Kim, and J. Y. Lee. "A Study on Mechanical Behavior of Dental Hard Tissues and Dental Restorative Materials by Three-Point Bending Test." In ASME 2014 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/imece2014-36645.

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Dental restorative materials including amalgam, dental ceramic, gold alloy, dental resin, zirconia, and titanium alloy are used to reconstruct damaged teeth, as well as to recover their function. In this study, the mechanical properties of various dental restorative materials were determined using test specimens of identical shape and dimension under the same three-point bending test condition, and the test results were compared to enamel and dentin. The maximum bending force of enamel and dentin was 6.9 ± 2.1 N and 39.7 ± 8.3 N, and the maximum bending deflection was 0.12 ± 0.02 mm and 0.25 ± 0.03 mm, respectively. The maximum bending force of amalgam, dental ceramic, gold alloy, dental resin, zirconia, and titanium alloy were 1.9 ± 0.4 N, 2.7 ± 0.6 N, 66.9 ± 4.1 N, 2.7 ± 0.3 N, 19.0 ± 2.0 N, and 121.3 ± 6.8 N, respectively, and the maximum bending deflection was 0.20 ± 0.08 mm, 0.28 ± 0.07 mm, 2.53 ± 0.12 mm, 0.37 ± 0.05 mm, 0.39 ± 0.05 m, and 2.80 ± 0.08 mm, respectively. The dental restorative materials that possessed greater maximum bending force than that of enamel were gold alloy, zirconia, and titanium alloy. Gold alloy and titanium alloy had greater maximum bending force than dentin. The dental restorative materials that possessed greater maximum bending deflection than that of enamel were all of the dental restorative materials, and the dental restorative materials that possessed greater maximum bending deflection than that of dentin were all of the dental restorative materials except amalgam. The appropriate dental restorative materials for enamel are gold alloy and zirconia and for dentin is gold alloy concerning the maximum bending force and the maximum bending deflection. These results are expected to aid dentists in their choice of better clinical treatment and to contribute to the development of dental restorative materials that possess properties that are most similar to the mechanical properties of dental hard tissue.
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Grandisoli, C. L., F. D. Alves-de-Souza, M. M. Costa, L. Castro, P. A. Ana, D. M. Zezell, and E. C. Lins. "Viability of imaging structures inside human dentin using dental transillumination." In SPIE BiOS, edited by Peter Rechmann and Daniel Fried. SPIE, 2014. http://dx.doi.org/10.1117/12.2040082.

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Demos, Stavros G., Mehdi Balooch, Grayson W. Marshall, Sally J. Marshall, and R. R. Gallagher. "Optical spectroscopy study of transparent noncarious human dentin and dentin-enamel junction." In BiOS 2000 The International Symposium on Biomedical Optics, edited by John D. B. Featherstone, Peter Rechmann, and Daniel Fried. SPIE, 2000. http://dx.doi.org/10.1117/12.380814.

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MacDougall, Mary. "HUMAN CHROMOSOME 4q21 DENTIN/BONE GENE CLUSTER: IMPLICATIONS IN DENTIN GENETIC DISEASE." In 3rd International Conference on Osteopontin and SIBLING (Small Integrin-Binding Ligand, N-linked Glycoprotein) Proteins, 2002. TheScientificWorld Ltd, 2002. http://dx.doi.org/10.1100/tsw.2002.354.

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Chun, Keyoung Jin, Hyun Ho Choi, and Jong Yeop Lee. "A Study of the Mechanical Role of Enamel and Dentin in Human Teeth." In ASME 2012 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/imece2012-86831.

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The dental hard tissues of a tooth are combined of enamel and dentin together. The enamel protects the dentin and comes in direct contact with food during mastication. Bite force is expressed as compression force. The purpose of this study is to identify the primary roles of enamel and dentin during mastication by analyzing their mechanical properties and hardness. Healthy human teeth (age: 19.3 ± 4.1) were used as specimens for mechanical tests. The teeth, which underwent epoxy resin molding, were machine cut to make 10 enamel specimens, 10 dentin specimens and 10 enamel–dentin composite (ED) specimens of 1.2 mm × 1.2 mm × 3.0 mm (Width × Height × Length) in size. Compression tests were conducted using a micro-load system at 0.1 mm/min test speed. Teeth surface hardness (HV) was measured by a Vickers diamond indenter with a 300g indentation load. Data were obtained from 4 points on each enamel specimen and 4 points on each dentin specimen. The strain (%), stress (MPa) and modulus of elasticity (E, MPa) of the specimens were obtained from compression tests. The MAX. strain of the enamel, dentin and ED specimens were 4.5 ± 0.8 %, 11.9 ± 0.1 % and 8.7 ± 2.7 %, respectively. The MAX. stress of the enamel, dentin and ED specimens were 62.2 ± 23.8 MPa, 193.7 ± 30.6 MPa and 126.1 ± 54.6 MPa, respectively. The E values of the enamel, dentin and ED specimens were 1338.2 ± 307.9 MPa, 1653.7 ± 277.9 MPa and 1628.6 ± 482.7 MPa, respectively. The E of the dentin specimens was the highest and the E of the enamel specimens was the lowest, but the E values of all specimens was not significantly different in the T-test (P > 0.1). The measured hardness value of the enamel specimens (HV = 274.8 ± 18.1) was about 4.2 times higher than that of the dentin specimens (HV = 65.6 ± 3.9). Because of the values of MAX. stress and MAX. strain of the enamel specimens, the enamel specimens tended to fracture earlier than the dentin and ED specimens; therefore, enamel was considered to be more brittle than dentin and ED. Enamel is a harder tissue than dentin based on their measured hardness values. Therefore, enamel has a higher wear resistance, making it suitable for grinding and crushing, whereas dentin has a higher force function, making it suitable for abutment against bite force.
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Alves, Sandra, Rui Vilar, Vitor Oliveira, Liliana Cangueiro, and Amelia Almeida. "Femtosecond laser ablation of dentin." In ICALEO® 2012: 31st International Congress on Laser Materials Processing, Laser Microprocessing and Nanomanufacturing. Laser Institute of America, 2012. http://dx.doi.org/10.2351/1.5062557.

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Grisimov, Vladimir N. "Refractive index of bulk dentin." In Advanced Laser Dentistry, edited by Gregory B. Altshuler, Richard J. Blankenau, and Harvey A. Wigdor. SPIE, 1995. http://dx.doi.org/10.1117/12.207017.

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Senda, Akira, Osamu Matsui, Hisao Katada, Kazuari Kamiya, and Akira Gomi. "Characteristic changes of lased dentin." In Advanced Laser Dentistry, edited by Gregory B. Altshuler, Richard J. Blankenau, and Harvey A. Wigdor. SPIE, 1995. http://dx.doi.org/10.1117/12.207020.

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Reports on the topic "Dentin"

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Mahendra, Dedy Agoes, Kavanila Bilbalqish, Alexander Patera Nugraha, Arief Cahyanto, Kaushik Sengupta, Ankur Razdan, Kamal Hanna, and Ninuk Hariyani. Dentin-Derived Alveolar Bone Graft for Alveolar Augmentation: A Systematic Review. INPLASY - International Platform of Registered Systematic Review and Meta-analysis Protocols, December 2023. http://dx.doi.org/10.37766/inplasy2023.12.0109.

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Serban, Christa, Diana Lungeanu, Sergiu-David Bota, Claudia C. Cotca, Meda Lavinia Negrutiu, Virgil-Florin Duma, Cosmin Sinescu, and Emanuela Lidia Craciunescu. Emerging Technologies for Dentin Caries Detection. A Systematic Review and Meta-Analysis. INPLASY - International Platform of Registered Systematic Review and Meta-analysis Protocols, January 2022. http://dx.doi.org/10.37766/inplasy2022.1.0097.

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Review question / Objective: What is the diagnostic test accuracy of emerging technologies for non-cavitated dentin caries detection, considering in vivo and in vitro studies that reported results regarding the occlusal and proximal surfaces, over the last 10 years? Information sources: Electronic databases of Medline, Embase, and PubMed were searched for articles published within the last decade (January 2011 to August 2021).in the period mentioned above. Medline and Embase databases were searched concomitantly using the Ovid interface. To find articles potentially missed by the search, Google Scholar was queried for diagnostic validity studies pertaining to technologies for dentin caries diagnosis.
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Petrovic, Dorotea, Dora Galic, Davor Seifert, Nikolina Lesic, and Martina Smolic. Evaluation of Bioactive Glass Treatment for Dentin Hypersen-sitivity: A systematic review. INPLASY - International Platform of Registered Systematic Review and Meta-analysis Protocols, July 2023. http://dx.doi.org/10.37766/inplasy2023.7.0006.

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Karteva, Ekaterina, Neshka Manchorova, Zhelyazko Damyanov, Ognyan Petrov, and Stoyan Vladimirov. Crystallite Size of Crown and Root Dentin from Vital and Endodontically Treated Teeth. "Prof. Marin Drinov" Publishing House of Bulgarian Academy of Sciences, September 2021. http://dx.doi.org/10.7546/crabs.2021.09.17.

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Tan, Li, Qiong Liu, Yun Chen, Ya-Qiong Zhao, Jie Zhao, Marie Aimee Dusenge, Yao Feng, et al. Efficacy of sonic activation techniques on tubular dentin sealer penetration：A systematic review and meta-analysis. INPLASY - International Platform of Registered Systematic Review and Meta-analysis Protocols, July 2022. http://dx.doi.org/10.37766/inplasy2022.7.0116.

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Review question / Objective: Is sonic activation techniques more effective than conventional needle irrigation for the tubular dentin sealer penetration. The included study was a randomized controlled trial. Eligibility criteria: A comprehensive search was conducted for all published studies evaluating efficacy of percentage and maximum depth of sealer penetration, following the use of SI and standardized irrigants (NaOCl and EDTA). Because this can hardly be measured clinically, only confocal laser scanning microscopy (CLSM) studies were selected owing to wide use of this methodology for evaluating tubular dentin sealer penetration. The studies using previously filled roots or animal teeth, artificial debris, and plastic blocks, and studies measuring the penetration of tubular dentin sealers in lateral root canals, isthmus, or artificial grooves were excluded to maintain the standardized sample selecting and measuring (Virdee et al. 2018). The search was limited to articles published between January 2000 and June 2022 to ensure conclusions were drawn from contemporary data. There are no language restrictions on filtering articles to ensure the integrity of included data.
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Pople, John A. Collagen Orientation and Crystallite Size in Human Dentin: A Small Angle X-ray Scattering Study. Office of Scientific and Technical Information (OSTI), March 2001. http://dx.doi.org/10.2172/784894.

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MALDONADO, KARELYS, JUAN ESPINOZA, DANIELA ASTUDILLO, and WILSON BRAVO. Fatigue and fracture resistance and survival of occlusal veneers of composite resin and ceramics blocks in posterior teeth with occlusal wear: A protocol for a systematic review. INPLASY - International Platform of Registered Systematic Review and Meta-analysis Protocols, October 2021. http://dx.doi.org/10.37766/inplasy2021.10.0036.

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Review question / Objective: The aim of this systematic review is to synthesize the scientific evidence that evaluates fatigue and fracture resistance, survival, and stress distribution, of composite resin CAD/CAM and ceramic CAD/CAM occlusal veneers in posterior teeth with severe occlusal wear. Condition being studied: Currently there is an increase in cases of dental wear, due to several factors such as: excessive consumption of carbonated drinks, a diet high in acids, gastric diseases, anorexia, bulimia, dental grinding, use of highly abrasive toothpastes, or a combination of these(9) (10) (11) (12); which affect the patient in several aspects: loss of vertical dimension, sensitivity due to the exposure of dentin, esthetics, affectation of the neuromuscular system(11) (13) (14). With the advent of minimally invasive dentistry, occlusal veneers have been found to be a valid option to rehabilitate this type of cases and thus avoid greater wear of the dental structure with full coverage restorations. Sometimes when performing a tabletop it is not necessary to perform any preparation, thus preserving the maximum amount of dental tissue(3) (6) (15). Due to the masticatory load either in patients without parafunction where the maximum masticatory force is approximately 424 N for women and 630 N for men or in those who present parafunction where the maximum bite force can vary from 780 to 1120N(7), it is necessary that the occlusal veneers support that load which makes indispensable a compilation of studies investigating both fatigue and fracture resistance and the survival rate of occlusal veneers in different materials and thicknesses.
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Tiku, Sanjay, Aaron Dinovitzer, Vlad Semiga, and Binoy John. PR-214-073510-Z01 FS Fatigue Testing Plain Dents+Dents Interacting with Welds and Metal Loss with Data. Chantilly, Virginia: Pipeline Research Council International, Inc. (PRCI), August 2018. http://dx.doi.org/10.55274/r0011514.

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Dents in buried pipelines occur due to a number of potential causes; the pipe resting on rock, third party machinery strike, rock strikes during backfilling, amongst others. The long-term integrity of a dented pipeline segment is a complex function of a variety of parameters, including pipe geom-etry, indenter shape, dent depth, indenter support, pressure history at and following indentation. In order to estimate the safe remaining operational life of a dented pipeline, all of these factors must be accounted for in the analysis. In order to characterize the severity of a dent on the integrity of a pipeline system, there must first be sufficient information available describing the behavior of the deformed pipe when subjected to typical loading scenarios. While there have been a number of full scale test programs that have been used to develop general trends in the behavior of dented pipe subjected to cyclic pressure loads, these programs have not produced sufficiently detailed information in terms of material properties, dent and pipe response to pressure loading, to form the basis of a severity assessment criterion. The objective of the current project was to generate full scale dent fatigue test data necessary to develop, validate and/or evaluate dent models capable of predicting cyclic internal pressure related failures of a pipe segment. The data generated included: detailed material characterization of the pipes involved in full scale test program, dent profile measurement, dent strains during dent for-mation and cyclic loading and recording of the details of fatigue crack location and orientation within a dent. The test program developed detailed experimental data for: - Unrestrained plain dents, - Restrained plain dents, - Dents interacting with welds and - Dents interacting with metal loss.
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Reynolds, Julie C., Peter C. Damiano, Susan C. McKernan, Jennifer Sukalski, Brooke McInroy, and Raymond A. Kuthy. Evaluation of the Dental Wellness Plan. Private pratice dentist experiences in the first year. Iowa City, Iowa: University of Iowa Public Policy Center, March 2016. http://dx.doi.org/10.17077/l4ag-3btx.

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Tiku, Sanjay, Amin Eshraghi, Aaron Dinovitzer, and Arnav Rana. PR-214-114500-R01 Fatigue Life Assessment of Dents with and without Interacting Features. Chantilly, Virginia: Pipeline Research Council International, Inc. (PRCI), December 2018. http://dx.doi.org/10.55274/r0011540.

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The long-term integrity of a dented pipeline segment is a complex function of a variety of parameters, including pipe geometry, indenter shape, dent depth, indenter support, pressure history at and following indentation. In order to estimate the safe remaining operational life of a dented pipeline, all of these factors must be accounted for in the assessment. The current project provides pipeline operators with a methodology for assessing and managing dent fatigue, thus making it possible to prioritize response and remedial action(s) in an informed manner. The methodology allows the users to carry out dent ranking/prioritization and dent fatigue life assessment. In addition to the development of the plain dent fatigue life assessment methodology, dent weld and dent metal loss interaction criteria have been developed to ascertain their effect on the fatigue life of a dent. The dent assessment methodology utilizes dent shape information that can be derived from in-line inspection (ILI) data, operating pressure spectra and pipeline material grade. A three-level approach has been developed for assessing the fatigue life or cyclic pressure loading dependent fail-ure of pipeline dents. All three assessment levels draw upon information regarding pipeline operational, material and mechanical damage data. The assessment level selection and accuracy of the results are based upon the complexity of the features, the availability of required data and the level of detail and certainty in the input data. The three levels provide a range of alternatives for integrity management, where the appropriate method to use is dependent on the desired outcome and the available information.
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