Journal articles: 'Dental irreversible hydrocolloid'

1

do Nascimento, Jaqueline Alves. "Evaluation of the Dimensional Stability of an Irreversible Hydrocolloid Modified by the Addition of Condensation Silicone." Corpus Journal of Case Reports (CJCR) 3, no. 3 (November 29, 2022): 1–3. http://dx.doi.org/10.54026/cjcr/1026.

Full text

Abstract:

Knowing the properties and clinical indications of each material ensures that the dental surgeon can use techniques that guarantee better results for dental prostheses. This study aims to evaluate the dimensional stability of an irreversible hydrocolloid modified by the addition of silicone by condensation. During this evaluated the dimensional distortion of irreversible hydrocolloids according to conditioning time, for four commercial brands, being: Avagel (Dentsply), Hydrogum 5 (Zhermack Spa) and Jeltrate Plus (Dentsply) and Avagel plus Condensation Silicone (Zetaplus [Zhermach]). They were placed in a container with 100% humidity, and the following requirements were evaluated: weight, height, and length of the three groups during the following times: immediately, 24 hours, 48 hours, 72 hours, and 120 hours. All materials evaluated showed adequate dimensional stability within the initial 72 hours. The addition of condensation silicone to the irreversible hydrocolloid mixture did not improve the dimensional stability of the material.

APA, Harvard, Vancouver, ISO, and other styles

2

do Nascimento, Jaqueline Alves. "Evaluation of the Dimensional Stability of an Irreversible Hydrocolloid Modified by the Addition of Condensation Silicone." Corpus Journal of Case Reports (CJCR) 3, no. 3 (November 29, 2022): 1–3. http://dx.doi.org/10.54026/cjcr/10266.

Full text

Abstract:

Knowing the properties and clinical indications of each material ensures that the dental surgeon can use techniques that guarantee better results for dental prostheses. This study aims to evaluate the dimensional stability of an irreversible hydrocolloid modified by the addition of silicone by condensation. During this evaluated the dimensional distortion of irreversible hydrocolloids according to conditioning time, for four commercial brands, being: Avagel (Dentsply), Hydrogum 5 (Zhermack Spa) and Jeltrate Plus (Dentsply) and Avagel plus Condensation Silicone (Zetaplus [Zhermach]). They were placed in a container with 100% humidity, and the following requirements were evaluated: weight, height, and length of the three groups during the following times: immediately, 24 hours, 48 hours, 72 hours, and 120 hours. All materials evaluated showed adequate dimensional stability within the initial 72 hours. The addition of condensation silicone to the irreversible hydrocolloid mixture did not improve the dimensional stability of the material.

APA, Harvard, Vancouver, ISO, and other styles

3

Moldi, Arvind, Vimal Gala, Shivakumar Puranik, Smita Karan, Sumit Deshpande, and Neelima Neela. "Survey of Impression Materials and Techniques in Fixed Partial Dentures among the Practitioners in India." ISRN Dentistry 2013 (April 22, 2013): 1–5. http://dx.doi.org/10.1155/2013/430214.

Full text

Abstract:

Objective. Anecdotal evidence suggests that impression materials and techniques used in general dental practice for fixed partial dentures vary from those taught in dental schools. The aim of this survey was to integrate impression techniques evolved all over the years for fixed partial dentures and to know the techniques and materials which are used in the present day by the practitioners. Materials and Methods. A total of 1000 questionnaires were sent to various practitioners in India, out of which 807 questionnaires were filled. Results. The results showed that 84.8% of prosthodontists (65.56%, urban areas) use elastomeric impression materials as well as irreversible hydrocolloids and 15.2% use irreversible hydrocolloid only. Amongst other practitioners, 55.46% use irreversible hydrocolloid (45%, rural and semiurban areas) and 44.54% use elastomeric impression materials. Elastomeric impression technique practiced most commonly is putty reline with/without spacer (77.2%); other techniques are multiple-mix and monophase techniques. Conclusion. The ideal materials, technique, and armamentarium are required for the long-term success of the treatment for fixed partial denture. Also, if the ideal procedure is not followed, it will lead to a compromised fit of the final prosthesis and failure of the treatment.

APA, Harvard, Vancouver, ISO, and other styles

4

Memarian, Maryam, Mohamad Reza Fazeli, Hossein Jamalifar, and Ahmad Azimnejad. "Disinfection Efficiency of Irreversible Hydrocolloid Impressions Using Different Concentrations of Sodium Hypochlorite: A Pilot Study." Journal of Contemporary Dental Practice 8, no. 4 (2007): 27–34. http://dx.doi.org/10.5005/jcdp-8-4-27.

Full text

Abstract:

Abstract Aim Dental impressions are potential sources of bacterial contamination which could eventually lead to transmissible infectious diseases through the blood or saliva. Sodium hypochlorite is an effective disinfectant recommended by the American Dental Association (ADA) in a 1:10 dilution for a ten minute immersion to disinfect irreversible hydrocolloid impressions. As the ADA protocol is sometimes neglected in busy practice settings, this pilot study was designed to determine an efficient and effective protocol for disinfection of irreversible hydrocolloid impressions. Methods and Materials Various concentrations of sodium hypochlorite and disinfection times were challenged against irreversible hydrocolloid impressions contaminated with six Gram-positive and Gram-negative bacteria. Results A two minute immersion time in a 0.6% solution of sodium hypochlorite protocol was found to prevent bacterial growth on the impressions. Conclusion Disinfection of irreversible hydrocolloid impressions in a 0.6% solution of sodium hypochlorite for two minutes was as effective as the ADA's protocol of using a 0.5% sodium hypochlorite solution for ten minutes to destroy the test bacteria. Citation Memarian M, Fazeli MR, Jamalifar H, Azimnejad A. Disinfection Efficiency of Irreversible Hydrocolloid Impressions Using Different Concentrations of Sodium Hypochlorite: A Pilot Study. J Contemp Dent Pract 2007 May;(8)4:027-034.

APA, Harvard, Vancouver, ISO, and other styles

5

King, Shalinie, Howard See, Graham Thomas, and Michael Swain. "Determining the complex modulus of alginate irreversible hydrocolloid dental material." Dental Materials 24, no. 11 (November 2008): 1545–48. http://dx.doi.org/10.1016/j.dental.2008.03.021.

Full text

APA, Harvard, Vancouver, ISO, and other styles

6

Rungkiertsakul, Mallika, Pornrachanee Sawaengkit, Passiri Nisalak, Sroisiri Thaweboon, and Pornkiat Churnjitapirom. "Physical Properties of Irreversible Hydrocolloid Impression Material Incorporated with Silver-Nanoparticles." Materials Science Forum 909 (November 2017): 182–86. http://dx.doi.org/10.4028/www.scientific.net/msf.909.182.

Full text

Abstract:

Dental impression is a source of cross infection and transmission of diseases. Conventional disinfection may lead to a change in physical properties. Self-disinfectant irreversible hydrocolloid is an alternative to the disinfection and can prevent microbial cross contamination. The present study evaluates the physical properties of irreversible hydrocolloid impression material incorporated with 0.5%, 1.0% and 1.5% w/w silver nanoparticles (AgZrPO4, Sunshine Factory Co.,Ltd, China). The working time and detail reproduction were tested according to ISO 21563:2013 with some modification. The result showed that AgZrPO4 did not significantly affect the physical properties of the impression material. Based on this in vitro study, AgZrPO4 can be added to the impression material for its antimicrobial benefit without significant changes in the physical properties of the material.

APA, Harvard, Vancouver, ISO, and other styles

7

SILVA, Thalisson Saymo de Oliveira, Urias da Silva VASCONCELOS, Gregório Antonio Soares MARTINS, Valdimar da Silva VALENTE, and Carmem Dolores Vilarinho Soares de MOURA. "Conducts of disinfection, pouring and storage of irreversible hydrocolloid impressions by undergraduate students." Revista de Odontologia da UNESP 45, no. 1 (January 26, 2016): 1–6. http://dx.doi.org/10.1590/1807-2577.06215.

Full text

Abstract:

Abstract Introduction Obtaining dental models that accurately represent the molded oral tissue requires professional attention, especially when using irreversible hydrocolloid as a molding material. Objective To evaluate the conducts of undergraduate dental students at different internships for the disinfecting procedures, pouring, and storage of irreversible hydrocolloid impressions. Material and method This is an observational, cross-sectional and descriptive study with a census sample of 89 students enrolled in the supervised internships I, II, III and IV. Data collection was performed using a structured questionnaire containing eight questions. Data were analyzed at the 5% significance level. Result Most of the students (88.8%) performed the disinfection procedure, for which the most widely used method (64.6%) was the application of sodium hypochlorite 1% spray stored in a sealed container. The most common disinfection time was 10 minutes (86.1%). Students in the early internships performed better in regard to the proportion of water/plaster to be used compared with students in the final internships. At all internships, pouring and storage of the ensemble of mold and model were neglected during the setting reaction. There was a statistically significant association between the stage and the disinfection method, the ratio of water/powder and pouring of the model (p<0.05). Conclusion Students exhibited appropriate conduct of disinfection; however, they should be encouraged to use evidence-based clinical practices in order to improve the procedures of pouring and storage of irreversible hydrocolloid molds.

APA, Harvard, Vancouver, ISO, and other styles

8

Sfarghiu, Lorelai Georgeta, Sorin Popşor, Viorel Ştefan Perieanu, Mariana Păcurar, Anca Temelcea, Ileana Ionescu, Oana Eftene, Liliana Burlibaşa, Mădălina Perieanu, and Mihai Burlibaşa. "Clinical and microbiological study of bacterial contamination of frequently used dental impression materials." Romanian Medical Journal 63, no. 1 (March 31, 2016): 24–30. http://dx.doi.org/10.37897/rmj.2016.1.6.

Full text

Abstract:

Mass distribution of different infectious diseases appears even more likely in dentistry than other medical specialities. The purpose of the study is to examine different impressions with alginate materials in order to demonstrate the contamination with different pathogens. Material and method. 63 patients were included in this study. They required specific prosthetic treatment. Preliminary impression were obtained with irreversible hydrocolloid material and microbiologically tested shorthy after removal from the mouth, after washed throughly with cold water and after decontamination with specific desinfectants. Results. Microbiologic records on the alginate impressions in different stages, revealed a reduction in number of bacteria, but not completely absence, regardless of the type of decontamination substance. Conclusions. The presence of different pathogens on the surface of irreversible hydrocolloid impresions is certain. There are residual bacteria which differ from one substance to another, irrespective of cleaning stages and decontamination materials used in daily manipulation of dental impresion. Even if time consuming, decontamination of alginate impression is compulsory in dentistry.

APA, Harvard, Vancouver, ISO, and other styles

9

Benakatti, Veena B., Abhijit P. Patil, Jayashee Sajjanar, Supriya S. Shetye, Ulhas N. Amasi, and Raghunath Patil. "Evaluation of Antibacterial Effect and Dimensional Stability of Self-disinfecting Irreversible Hydrocolloid: An in vitro Study." Journal of Contemporary Dental Practice 18, no. 10 (2017): 887–92. http://dx.doi.org/10.5005/jp-journals-10024-2144.

Full text

Abstract:

ABSTRACT Aim This study evaluated the antibacterial activity and dimensional stability of irreversible hydrocolloids mixed with different concentrations of chlorhexidine gluconate instead of water. Materials and methods Experimental specimens (45 specimens) were prepared and allocated into three groups of 15 each. Group I: Impression material mixed with distilled water served as control. Groups II and III were prepared with 0.12 and 0.2% chlorhexidine gluconate solution, respectively. Specimens in each group were subjected to tests for dimensional stability. For antimicrobial activity, 30 specimens were prepared and allocated into three groups of 10 each named as group I (control), group II (0.12% chlorhexidine gluconate), and group III (0.2% chlorhexidine gluconate) similar to specimens for dimensional stability. Statistical analysis was performed using a one-way analysis of variance (ANOVA) and Tukey test. Results Zones of inhibition were observed around test specimens, but not around control specimens; there was a significant intergroup difference in the diameters of the inhibition zones. In the test for dimensional stability, no significant differences were detected among groups, and the accuracy was clinically acceptable. Conclusion Irreversible hydrocolloid impression material mixed with chlorhexidine exhibits varying degrees of antibacterial activity without influencing the dimensional stability of set material. Clinical significance Many contagious diseases can be prevented by practical control of infection in the dental office. Chlorhexidine gluconate, as a mixing liquid, ensures disinfection of impression, and this method of disinfection is more convenient and avoids extra effort as in other disinfection techniques. How to cite this article Benakatti VB, Patil AP, Sajjanar J, Shetye SS, Amasi UN, Patil R. Evaluation of Antibacterial Effect and Dimensional Stability of Self-disinfecting Irreversible Hydrocolloid: An in vitro Study. J Contemp Dent Pract 2017;18(10):887-892.

APA, Harvard, Vancouver, ISO, and other styles

10

Joo, Young-Hun, and Jin-Han Lee. "Three dimensional accuracy analysis of dental stone casts fabricated using irreversible hydrocolloid impressions." Journal of Dental Rehabilitation and Applied Science 31, no. 4 (December 31, 2015): 316–28. http://dx.doi.org/10.14368/jdras.2015.31.4.316.

Full text

APA, Harvard, Vancouver, ISO, and other styles

11

Schutt, Robert W. "Bactericidal effect of a disinfectant dental stone on irreversible hydrocolloid impressions and stone casts." Journal of Prosthetic Dentistry 62, no. 5 (November 1989): 605–7. http://dx.doi.org/10.1016/0022-3913(89)90088-7.

Full text

APA, Harvard, Vancouver, ISO, and other styles

12

Lidia Olga Bach Pinheiro, Alfonso Sanchez Ayala, Marcos Cezar Pomini, Vanessa Taborda da Cruz, Ingrid Viel del Farias, and Adriana Postiglione Buhrer Samra. "Linear dimensional stability of irreversible hydrocolloids with and without disinfection at different storage times." RSBO 15, no. 2 (December 20, 2018): 77–83. http://dx.doi.org/10.21726/rsbo.v15i2.617.

Full text

Abstract:

Irreversible hydrocolloids have been used in dental practice for decades and their pouring time has been suggested to be as short as possible; however the latest generation of alginates exhibit better properties, which could influence the fidelity of the casts. Objective: To evaluate the linear dimensional stability of stone casts obtained using two irreversible hydrocolloid brands (Cavex ColorChange and Jeltrate) after disinfection. Material and methods: Samples were divided into 16 groups (n = 10) according to brand, storage time and disinfection. Impressions were taken of a metallic master model made of stainless steel with two abutments. Cast models were obtained using type IV gypsum, after disinfection with sodium hypochlorite at 1% or without any disinfection followed by storage for four different times (immediate pouring, and after 24, 72 or 120 hours storage after obtaining the impressions) and the models were measured with a digital caliper. Data were submitted to ANOVA 3-way followed by Tukey’s test (α < 0.05). Results: A statistically significant difference was detected with Jeltrate Plus after 72 and 120 hours in storage (with and without disinfection), as well as Cavex without disinfection. Differences were found for Cavex with disinfection/24 hours storage, when compared to immediate pouring (P < 0.05). The alginates presented similar behavior regarding disinfection for the same time (P > 0.05). Conclusion: Storage longer than 24 hours affects the fidelity of casts. Disinfection does not promote significant alteration at any of the experimental times with either material.

APA, Harvard, Vancouver, ISO, and other styles

13

Pinheiro, Lidia Olga Bach, Alfonso Sanchez Ayala, Marcos Cezar Pomini, Vanessa Taborda da Cruz, Ingrid Viel del Farias, and Adriana Postiglione Buhrer Samra. "Linear dimensional stability of irreversible hydrocolloids with and without disinfection at different storage times." RSBO 15, no. 2 (January 25, 2019): 77. http://dx.doi.org/10.21726/rsbo.v15i2.673.

Full text

Abstract:

Irreversible hydrocolloids have been used in dental practice for decades and their pouring time has been suggested to be as short as possible; however the latest generation of alginates exhibit better properties, which could influence the fidelity of the casts. Objective: To evaluate the linear dimensional stability of stone casts obtained using two irreversible hydrocolloid brands (Cavex ColorChange and Jeltrate) after disinfection. Material and methods: Samples were divided into 16 groups (n = 10) according to brand, storage time and disinfection. Impressions were taken of a metallic master model made of stainless steel with two abutments. Cast models were obtained using type IV gypsum, after disinfection with sodium hypochlorite at 1% or without any disinfection followed by storage for four different times (immediate pouring, and after 24, 72 or 120 hours storage after obtaining the impressions) and the models were measured with a digital caliper. Data were submitted to ANOVA 3-way followed by Tukey’s test (α < 0.05). Results: A statistically significant difference was detected with Jeltrate Plus after 72 and 120 hours in storage (with and without disinfection), as well as Cavex without disinfection. Differences were found for Cavex with disinfection/24 hours storage, when compared to immediate pouring (P < 0.05). The alginates presented similar behavior regarding disinfection for the same time (P > 0.05). Conclusion: Storage longer than 24 hours affects the fidelity of casts. Disinfection does not promote significant alteration at any of the experimental times with either material.

APA, Harvard, Vancouver, ISO, and other styles

14

Okazaki, Luiz Kiyoaki, Cidney Hiroaki Cato, Lúcia Teramoto, Anna Carolina Borges Pereira Costa, Marcelo Fava, João Batista Macedo Becker, and Antonio Olavo Cardoso Jorge. "Comparison of disinfection protocol of irreversible hydrocolloid (alginate) impressions through plastic and metallic trays." Brazilian Dental Science 17, no. 3 (August 25, 2014): 54. http://dx.doi.org/10.14295/bds.2014.v17i3.999.

Full text

Abstract:

Introduction: Many studies have evaluated the disinfection of irreversible hydrocolloid impressions through different disinfecting agents. However, impression trays can be source of cross-infection requiring disinfection. This study aimed to determine which would be the most suitable tray (metallic or plastic), available in dental market, and the ideal time to achieve disinfection by using 1% sodium hypochlorite poured into the alginate impression. Material and methods: Thirty dental impressions from the patients aged from 7-12 years and treated in the Discipline of Orthodontics of the institution were divided into two groups according to the impression tray type: 15 impressions through plastic tray (Morelli) and 15 impressions through metallic tray (Tecnodent). The material collection was performed before and after the application of 1% sodium hypochlorite for 3, 5 and 10 minutes. After the incubation period of 48 hours at 37ºC, the microorganism colonies were counted on the plates presenting from 30 to 300 colonies to determine the colony-forming unit (CFU) per mL. CFU/mL results were transformed into logarithm and submitted to statistical analysis by applying ANOVA and Tukey test (p ≤ 0.05). Results: Greater CFU percentage reduction occurred in alginate after three minutes, in both tray types. Concerning to tray types, it could be observed that the plastic tray showed 100% of reduction after 5 minutes while the metallic tray exhibited 81.49% of reduction after 3 minutes. Conclusion: 1 – The plastic tray showed the most effective disinfection after 5 minutes, with 100% of CFU reduction; 2 – The most effective time of disinfection with 1% sodium hypochlorite poured into the impression was 5 minutes, for both tray types.

APA, Harvard, Vancouver, ISO, and other styles

15

Hamrun, N., B. Thalib, D. Tahir, Asmawati, A. M. Hamudeng, and F. H. Akbar. "Physical properties of irreversible hydrocolloid dental impression materials obtained from brown algae species Padina sp." Journal of Physics: Conference Series 1073 (August 2018): 052018. http://dx.doi.org/10.1088/1742-6596/1073/5/052018.

Full text

APA, Harvard, Vancouver, ISO, and other styles

16

Sevedge, Steven R., Ronald B. Gunderson, and Michael T. Singer. "Linear distortion and compatibility of an antimicrobial irreversible hydrocolloid impression material and improved dental stones." Journal of Prosthetic Dentistry 62, no. 5 (November 1989): 612–15. http://dx.doi.org/10.1016/0022-3913(89)90091-7.

Full text

APA, Harvard, Vancouver, ISO, and other styles

17

OWEN, C. P. "An investigation into the compatibility of some irreversible hydrocolloid impression materials and dental gypsum products." Journal of Oral Rehabilitation 13, no. 2 (March 1986): 147–62. http://dx.doi.org/10.1111/j.1365-2842.1986.tb00647.x.

Full text

APA, Harvard, Vancouver, ISO, and other styles

18

OWEN, C. P. "An investigation into the compatibility of some irreversible hydrocolloid impression materials and dental gypsum products." Journal of Oral Rehabilitation 13, no. 1 (January 1986): 93–103. http://dx.doi.org/10.1111/j.1365-2842.1986.tb01559.x.

Full text

APA, Harvard, Vancouver, ISO, and other styles

19

Hamrun, Nurlindah, Bahruddin Talib, Muhammad Ruslin, Hasminar Pangeran, Mochammad Hatta, Erni Marlina, Andi Sitti Hajrah Yusuf, Takashi Saito, and Keng-Liang Ou. "A Promising Potential of Brown Algae Sargassum polycystum as Irreversible Hydrocolloid Impression Material." Marine Drugs 20, no. 1 (January 6, 2022): 55. http://dx.doi.org/10.3390/md20010055.

Full text

Abstract:

This study aimed to investigate the potential use of brown algae Sargassum polycystum as irreversible hydrocolloid (alginate) impression material. Potassium alginate extracted from Sargassum polycystum was prepared in three different compositions (14%, 15%, and 16%) and mixed with other standard components to form an alginate impression material. Prior to that, the purity of potassium alginate was quantified with Fourier Transform Infrared Spectroscopy (FTIR) analysis. As a control material, the alginate impression material from a commercially available product was used. All alginate impression materials were then applied to a die stone model. Dimensional accuracy was measured by calculating the mesiodistal width of incisors in the generated dental cast using a digital caliper 0.01 accuracy (five replications). In addition, to evaluate the dimensional stability, the impression results were poured at four different periods (immediately, 5 min, 10 min, and 15 min). An independent t-test was performed to compare the measurement results with p < 0.05 considered significant. Analytical results confirm that the impression material containing 15% potassium alginate gives the best dimensional accuracy similar to control (p > 0.05). Meanwhile, the optimal dimensional stability was produced in the impression material containing 16% potassium alginate. Our study suggested that brown algae Sargassum polycystum has a promising potential to be used as an alginate impression material in clinical application.

APA, Harvard, Vancouver, ISO, and other styles

20

Fellows, C. M., and G. A. Thomas. "Determination of bound and unbound water in dental alginate irreversible hydrocolloid by nuclear magnetic resonance spectroscopy." Dental Materials 25, no. 4 (April 2009): 486–93. http://dx.doi.org/10.1016/j.dental.2008.10.001.

Full text

APA, Harvard, Vancouver, ISO, and other styles

21

Ranggang, Baharuddin M,, Muhammad Ihsan, Wd. Hikmah Noor Shafar Nafiu, Aulia Anindita Ainayyah, Mohammad Resky Asri Putra, Rezky Ayu Pratiwi, and Nurul Aulia Azti Azis. "Utilization of brown algae (Sargassum Sp) as dental impression material." Makassar Dental Journal 11, no. 2 (August 31, 2022): 138–42. http://dx.doi.org/10.35856/mdj.v11i2.575.

Full text

Abstract:

ABSTRACT Two-thirds of Indonesia's territory is mostly waters. The United Nations Convention on the Law of the Sea in 1982 stated that the area of Indonesian waters is 5.8 million km2 and there are 27.2% of all flora and fauna species. Algae is one of the most abundant biological resources in Indonesian waters, which is about 8.6%. In Indonesian waters, there are about 28 species of brown algae from six genera including Dyctyota, Padine, Hormophysa, Sargassum, Turbinaria andHydroclathrus. Brown al-gae have a large alginate content in their cell walls, approximately 40% of their dry weight. The alginate contained in brown al-gae canbe used in industrial fields, such as the dental impression material industry. The main active ingredients in the manufac-ture of irreversible hydrocolloid impression materials are sodium alginate, potassium alginate, and triethanolamine alginate. Sodium alginate and potassium alginate can be extracted from brown algae species such as Sargassum sp.

APA, Harvard, Vancouver, ISO, and other styles

22

Cubas, Glória, Fernanda Valentini, Guilherme Camacho, Fábio Leite, Maximiliano Cenci, and Tatiana Pereira-Cenci. "Antibacterial Efficacy and Effect of Chlorhexidine Mixed with Irreversible Hydrocolloid for Dental Impressions: A Randomized Controlled Trial." International Journal of Prosthodontics 27, no. 4 (July 2014): 363–65. http://dx.doi.org/10.11607/ijp.3688.

Full text

APA, Harvard, Vancouver, ISO, and other styles

23

Muller-Bolla, M., L. Lupi-Pégurier, A. M. Velly, and M. Bolla. "A survey of disinfection of irreversible hydrocolloid and silicone impressions in European Union dental schools: Epidemiologic study." Journal of Prosthetic Dentistry 92, no. 4 (October 2004): 321. http://dx.doi.org/10.1016/j.prosdent.2004.06.014.

Full text

APA, Harvard, Vancouver, ISO, and other styles

24

Neppelenbroek, Karin Hermana, Vinicius Carvalho Porto, Carolina Campos Sugio, Anna Clara Gurgel Gomes, and Amanda Aparecida Maia Neves Garcia. "Minimizing the risk of fracture of definitive casts for removable partial dentures: A dental technique." IP Annals of Prosthodontics and Restorative Dentistry 7, no. 4 (December 15, 2021): 240–41. http://dx.doi.org/10.18231/j.aprd.2021.047.

Full text

Abstract:

A technique is described to facilitate impression making and safely obtain the definitive cast for removable partial dentures with long, retentive, or lone-standing abutment teeth. Firstly, the individualized stock tray receives a coating of melted wax. Next, the prepared teeth are impressed with irreversible hydrocolloid, and the set impression is removed from mouth. The mold is then poured conventionally and, after the gypsum has set, is immersed in hot water to soften the wax and allow removal of the tray. The impression material is carefully cut away with a scalpel blade to expose the cast. With these straightforward and easily made changes compared with the conventional technique, the risk of fracturing the definitive cast is minimized, especially when reproducing long retentive teeth. A dental technique is presented that uses wax to coat the impression tray to facilitate the passive displacement of the cast. This results in a straightforward and precise definitive cast for removable partial dentures.

APA, Harvard, Vancouver, ISO, and other styles

25

Ibrahem, Fatemah, Thomas Giugliano, Ryan Richard Ruff, and Mijin Choi. "Digital Analysis of the Dimensional Change Of an Irreversible Hydrocolloid Impression Material (Alginate) with Varying Storage Times." Primary Dental Journal 11, no. 4 (December 2022): 86–91. http://dx.doi.org/10.1177/20501684221133417.

Full text

Abstract:

Aim: The aim of this study was to digitally measure the dimensional changes in an irreversible hydrocolloid impression material (alginate) resulting from varying storage times under optimal storage conditions. Materials and methods: A single type V dental stone control cast was used to make 25 alginate impressions using perforated stock trays. The impressions were randomly assigned into five groups of five samples each (n=5 per group) with varying storage times: Group 1, poured at 15 minutes; Group 2, poured at one hour; Group 3, poured at 24 hours (one day); Group 4, poured at 72 hours (three days); Group 5, poured at 168 hours (seven days). All impressions were stored in sealed Ziploc® plastic bags with a wet paper towel (100% relative humidity) at room temperature and stored according to the assigned group storage times. All impressions were poured in type V dental stone according to the manufacturer’s instructions. The casts were scanned with a digital 3D desktop scanner and saved as electronic stereolithography (.stl) files. Each .stl file of the scanned casts were superimposed on the .stl file of the control cast using Geomagic® Control X™ software. Three preselected fixed comparison measuring points (CMP) on each cast were compared to the control cast. Point one (CMP1) was on the midfacial surface of central incisor. Point two (CMP2) and point three (CMP3) were on the mesiobuccal proximal marginal ridge areas of third molars. The discrepancies between the files at each point were analysed with colour maps, and quantified (Table 1). The tolerance was set at ±10μm. CMP scores were analysed using one-way analysis of variance (ANOVA) and Kruskal-Wallis (K-W) non-parametric H tests. Results: Average gap distances across groups ranged from 0.04mm (seven-day group) to 0.06mm (one hour and 24-hour groups). Colour maps indicated increased dimensional change with increased storage time up to one day. After three days, shrinkage up to 139μm was measured. ANOVA results for CMP1 (F[4,20] = 1.65, p = 0.020) and CMP3 (F[4,20] = 0.44, p = −0.78) were not statistically significant. Similarly, K-W results for CMP2 were not significant (χ2= 3.62, p = 0.46). Conclusions: Under optimal storage conditions, there were no significant dimensional changes in casts poured from alginate up to seven days.

APA, Harvard, Vancouver, ISO, and other styles

26

Hamrun, Nurlindah, and Suci Amalia Rachman. "Measuring sodium alginate content of brown algae species Padina sp. As the basic matter for making dental impression material (Irreversible hydrocolloid impression material)." Journal of Dentomaxillofacial Science 1, no. 2 (August 31, 2016): 275. http://dx.doi.org/10.22208/jdmfs.1.2.2016.275-279.

Full text

Abstract:

One of the most important procedures in denture fabrication and orthodontic treatment is molding the patient’s detail oral cavity to determine the treatment planning. This procedure was done by using alginate impression material or irreversible hydrocolloid in which the basic material is sodium alginate imported from abroad because it is extracted from brown algae which its habitat is not in Indonesia so that it is causes the impression material is relatively expensive roomates is impact to high cost of dental treatment. Indonesia as the archipelago country has availability of abundant brown algae Padina sp. Especially in Puntondo-Punaga seashore, South Sulawesi, but it has not Cultivate yet by the local society because it is never discovered by alginate industry so it is just grow wild and its potency is useless. This experiment identified the purposes of how much sodium alginate is produced from Padina Sp. Extraction as the basic matter of irreversible hydrocolloid. The design of this study is experimental design with one shot case study method. In early stage research, extraction of alginate in the form of sodium alginate. After that, they are weighted by using analytical weight in milligrams (mg) unit. Then, it is compare with the standard sodium alginate to observe the similarity of molecules by using FTIR (Fourier Transform Infra Red) device. Data were Analyzed using mean differences. Based on Padina extracted, produced 12.86 g of sodium alginate content or 28.4% from the cleaning algae was used roomates total weight is 45 g. Based on FTIR test, showed that sodium alginate is extracted similar to the standard sodium alginate with the found of hydroxyl, carboxylic acid, ether group and the which is the composer of sodium alginate. In conclusion, from both of infra red spectrum pattern, it was observed unsignificant difference. Extracted sodium alginate Padina is same with the standard sodium alginate and it has 12.86 g content.

APA, Harvard, Vancouver, ISO, and other styles

27

Hamrun, Nurlindah, and Suci A. Rachman. "Measuring sodium alginate content of brown algae species padina sp. as the basic matter for making dental impression material (irreversible hydrocolloid impression material)." Journal of Dentomaxillofacial Science 1, no. 2 (August 31, 2016): 129. http://dx.doi.org/10.15562/jdmfs.v1i2.11.

Full text

Abstract:

One of the most important procedures in denture fabrication and orthodontic treatment is molding the patient’s detail oral cavity to determine the treatment planning. This procedure was done by using alginate impression material or irreversible hydrocolloid in which the basic material is sodium alginate imported from abroad because it is extracted from brown algae which its habitat is not in Indonesia so that it is causes the impression material is relatively expensive roomates is impact to high cost of dental treatment. Indonesia as the archipelago country has availability of abundant brown algae Padina sp. Especially in Puntondo-Punaga seashore, South Sulawesi, but it has not Cultivate yet by the local society because it is never discovered by alginate industry so it is just grow wild and its potency is useless. This experiment identified the purposes of how much sodium alginate is produced from Padina Sp. Extraction as the basic matter of irreversible hydrocolloid. The design of this study is experimental design with one shot case study method. In early stage research, extraction of alginate in the form of sodium alginate. After that, they are weighted by using analytical weight in milligrams (mg) unit. Then, it is compare with the standard sodium alginate to observe the similarity of molecules by using FTIR (Fourier Transform Infra Red) device. Data were Analyzed using mean differences. Based on Padina extracted, produced 12.86 g of sodium alginate content or 28.4% from the cleaning algae was used roomates total weight is 45 g. Based on FTIR test, showed that sodium alginate is extracted similar to the standard sodium alginate with the found of hydroxyl, carboxylic acid, ether group and the which is the composer of sodium alginate. In conclusion, from both of infra red spectrum pattern, it was observed unsignificant difference. Extracted sodium alginate Padina is same with the standard sodium alginate and it has 12.86 g content.

APA, Harvard, Vancouver, ISO, and other styles

28

Ahmed, AShafath, PDavid Charles, R. Cholan, M. Russia, R. Surya, and L. Jailance. "Antibacterial efficacy and effect of Morinda citrifolia L. mixed with irreversible hydrocolloid for dental impressions: A randomized controlled trial." Journal of Pharmacy and Bioallied Sciences 7, no. 6 (2015): 597. http://dx.doi.org/10.4103/0975-7406.163562.

Full text

APA, Harvard, Vancouver, ISO, and other styles

29

Hossain, Sharafat, Kazi Ziaul Islam, and KM Mohidul Islam. "Correlation between Maxillary Canines and Facial Anatomical Landmarks in a Group of Bangladeshi people." City Dental College Journal 9, no. 2 (October 21, 2012): 12–14. http://dx.doi.org/10.3329/cdcj.v9i2.12315.

Full text

Abstract:

Purpose: The objective of this study was to evaluate the correlation between maxillary canines and the facial landmarks including interalar width (IAW) and intercommissural width (ICoW) in a group of Bangladeshi people. Materials and methods: One hundred Bangladeshi subjects aged 18~35 years were selected. Irreversible hydrocolloid impression of the upper arch was taken and a cast was poured with dental stone.The interalar width (IAW) and intercommissural width (ICoW) were measured using digital vernier caliper. Intercanine tip (ICTW) and width of the distal surface of the canine (WDC) were measured from the cast using digital caliper. Results: The correlation between ICTW-IAW was 0.246. There was no correlation between ICTW-ICoW. The correlation between WDCIAW and WDC-ICoW were 0.342 and 0.235 respectively (p< .05). Conclusion: Both interalar width and intercommissural width had a weak correlation with the position of maxillary canine in this Bangladeshi subject group. For the construction of a pleasing and harmonious complete denture esthetic and phonetic outcomes are recommended to be considered in combination with facial landmarks. DOI: http://dx.doi.org/10.3329/cdcj.v9i2.12315 City Dental College J. Volume-9, Number-2, July-2012

APA, Harvard, Vancouver, ISO, and other styles

30

Rathod, Dr Priyanka, Dr Swati Pustake, Dr Shubham Hasban, and Dr Monika Jadhav. "Evaluation of the anti-microbial properties of prepared herbal solution on dental impressions with irreversible hydrocolloid- an ex vivo study." International Journal of Applied Dental Sciences 7, no. 3 (July 1, 2021): 216–23. http://dx.doi.org/10.22271/oral.2021.v7.i3c.1301.

Full text

APA, Harvard, Vancouver, ISO, and other styles

31

Dulaimi, Suha F., Atyaf M. Alnaser, and Najwah Y. Hameed. "The effect of contact time between alginate impression material and type III dental stone on the surface properties of stone casts." Journal of Baghdad College of Dentistry 33, no. 3 (September 15, 2021): 18–22. http://dx.doi.org/10.26477/jbcd.v33i3.2949.

Full text

Abstract:

Background: Alginate impression material is the irreversible hydrocolloid material that is widely used in dentistry. The contact time between alginate and gypsum cast could have a detrimental effect on the properties of the gypsum cast. The objective of this study is to evaluate the impact of various contact time intervals of Alginate impressions & type III dental stone on surface properties of stone cast. Materials and Methods: Time intervals tested were 1hour, 6 hours and 9 hours. Surface properties of stone cast evaluated were surface detail reproduction, hardness and roughness. Surface detail reproduction was determined using cylindrical brass test block in accordance with ISO 1563. Surface roughness was measured by profilometer and hardness was measured by Durometer (Shore D). Results: The detail reproduction showed significant difference (P<0.05), at 6 hr., and 9 hr. showed better results. While surface roughness significantly decreased (p<0.01) with prolonged contact time. However, surface hardness increased significantly (p<0.01) with increased contact time. Conclusions: Surface detail reproduction increased with increasing the contact time and this was noticed at (6, 9 hours). However, 1hour time interval showed decreased surface detailed reproduction. Roughness decreased when the contact time was increased between type III dental stone and alginate impression whereas, hardness was improved significantly with increasing contact time.

APA, Harvard, Vancouver, ISO, and other styles

32

Ferraz da Silva, JoãoMaurício, EduardoShigueyuki Uemura, Eron ToshioColauto Yamamoto, AlexandreLuizSouto Borges, AndressaRodrigues Dorner, and Virgilio VilasBoas Fernandes Junior. "Effect of disinfection of irreversible hydrocolloid impression materials with 1% sodium hypochlorite on surface roughness and dimensional accuracy of dental stone casts." European Journal of General Dentistry 3, no. 2 (2014): 113. http://dx.doi.org/10.4103/2278-9626.134835.

Full text

APA, Harvard, Vancouver, ISO, and other styles

33

Hassan, Fatima, Anum Baqar, Farnaz Ilyas, Farah Javed, Saman Hakeem, and Akbar Abbas. "The Pattern of Palatal Rugae in sub-population of Pakistani adults." Pakistan Journal of Medical and Health Sciences 15, no. 9 (September 30, 2021): 2157–60. http://dx.doi.org/10.53350/pjmhs211592157.

Full text

Abstract:

Background: Despite the existence of the most reliable and authentic tools of personal identification such as fingerprints, dental, and DNA analysis, the palatal rugae are recommended as an adjuvant aid in forensic diagnosis. Palatal rugoscopy or palatoscopy aims to specify a person’s identity and gender discrimination. Aim: To determine the morphological pattern of palatal rugae considering gender. Settings and design: Cross-sectional study, calcorrugoscopy, chi-square test Material: This incorporated 360 subjects encompassing an equal ratio of the male and female genders. Undertaking the inclusion and exclusion criteria of the study, calcorrugoscopy technique was utilized in which maxillary casts were obtained through irreversible hydrocolloid impression material (Cavex cream alginate – fast set) and poured in type III dental stone. The assessed morphological parameters were shape and unification. Trobo’s classification and Thomas and Kotze’s criteria were used to assess shape and unification respectively to assess the qualitative aspect of palatal rugae. Descriptive analysis was generated in terms of frequencies, percentages, means, and standard deviations. Results: The most frequently occurred rugae pattern was sinuous followed by a line with divergent unification. Sexual dimorphism was not evident among the selected subjects regarding rugae shape and unification configuration.Moreover, the same trend regarding shape and unification was repeated on both sides of the palate, with no significant difference noted in number of palatal rugae undertaking both sides. Conclusions: Every individual possesses a unique rugae pattern irrespective of gender. Keywords: Cross- sectional, Adults, Gender dimorphism, Pakistan, Palatal rugae

APA, Harvard, Vancouver, ISO, and other styles

34

Deogade, Suryakant Chhagan, Sneha S. Mantri, Sudhanshu Saxena, and Hemasha Daryani. "Correlation between Combined Width of Maxillary Anterior Teeth, Interpupillary Distance and Intercommissural Width in a Group of Indian People." International Journal of Prosthodontics and Restorative Dentistry 4, no. 4 (2014): 105–11. http://dx.doi.org/10.5005/jp-journals-10019-1116.

Full text

Abstract:

ABSTRACT Purpose The objective was to evaluate the correlation between the width of distal surface of canine (CWC), interpupillary distance (DMP) and intercommissural width (DCM) in a group of central Indian people. Materials and methods A total of 540 central Indian subjects (277 males and 263 females) aged 19 to 30 years were selected. DMP and DCM were measured on subject's face using digital vernier caliper [Mitutoyo (UK) Ltd.] with precision of 0.01 mm. Irreversible hydrocolloid impression of the upper arch was taken, and a cast was poured with dental stone. The CWC measurements were done on these casts with the help of a dental floss fixed between the distoproximal contacts of upper canines using a dental tape. Spearman's correlation test was used to determine the correlation between the three variables studied. Results The results revealed that the correlation between CWC-DMP was 0.015 and CWC-DCM was 0.031. The correlation showed negative values when compared between the sexes. Also, the proportions were calculated: DMP/CWC and DCM/CWC for the whole sample and for the sexes found no statistical significance (p > 0.05). Conclusion The results of this study suggest that the examined interpupillary distance and intercommissural width cannot be considered reliable guidelines in the selection of artificial upper frontal teeth. However, they may be used as a useful additional factor combined with other methods for objective teeth selection in complete denture therapy. How to cite this article Deogade SC, Mantri SS, Saxena S, Daryani H. Correlation between Combined Width of Maxillary Anterior Teeth, Interpupillary Distance and Intercommissural Width in a Group of Indian People. Int J Prosthodont Restor Dent 2014;4(4):105-111.

APA, Harvard, Vancouver, ISO, and other styles

35

Hamrun, Nurlindah, and Suci Amalia Rachman. "Measuring natrium alginate content of brown algae spesies Padina sp. as the basic matter for making dental impression material (Irreversible hydrocolloid impression material)." Journal of Dentomaxillofacial Science 1, no. 1 (June 20, 2016): 131. http://dx.doi.org/10.15562/jdmfs.v1i1.71.

Full text

APA, Harvard, Vancouver, ISO, and other styles

36

Ahsan, Mohamad Rafiul, Kazi Ziaul Islam, and Jebunnesa Begum. "Study on antimicrobial effect of disinfecting solutions on alginate impression materials." Update Dental College Journal 3, no. 1 (February 17, 2014): 18–23. http://dx.doi.org/10.3329/updcj.v3i1.17980.

Full text

Abstract:

Oral cavity contains 600 species of microbes named oral flora.Dental impressions get contaminated with micro-organisms from patients blood or saliva. So, impressions are recommended to disinfect before their further working steps. A study was carried out to find out a more effective disinfectant solution between 1% sodium hypochlorite and 2% glutaraldehyde solution on irreversible hydrocolloid impression and thereby identify their efficacy against microbial transmission to the resultant dental cast. In this study, hydrcolloid impression material was selected as the experimental elements because these are the materials which are mostly used in our country. These are disinfecting solution which are worldwide used. The findings suggested that the transmission rate from impression to the casts was 7% in control group (P<0.001). It was reduced to (0.6%) when disinfected by 1% sodium hypochlorite solution whereas transmission rate was minimum (0.08%) when disinfected by 2% glutaraldehde solution. The most important things is that it will be very easy for the clinician to produce this solution and disinfect the impression by these solutions and there will have no effect on the dimension of the impression or the cast DOI: http://dx.doi.org/10.3329/updcj.v3i1.17980 Update Dent. Coll. j: 2013; 3 (1): 18-23

APA, Harvard, Vancouver, ISO, and other styles

37

Dev, Shruti, Mirna Garhnayak, Angurbala Dhal, Lokanath Garhnayak, and Aswini K. Kar. "Assessment of Influence of Contact Time between Alginate and Type III Dental Stone on Properties of Cast Model: An in vitro Study." Journal of Contemporary Dental Practice 18, no. 10 (2017): 911–14. http://dx.doi.org/10.5005/jp-journals-10024-2148.

Full text

Abstract:

ABSTRACT Introduction Alginate is a versatile, irreversible hydrocolloid impression material, which is cost-effective and forms an essential component in dental practice. For elevating the hardness of the cast models, hardeners are combined with stone. Hence, we planned the present study to evaluate the impact of altering the time of contact between alginate and stone after various interim periods. Materials and methods The present study included the assessment of impact of time of contact between alginate and stone by the construction of 90 casts using a cylinder model. Two bisecting lines were marked and were named as y and y'. These lines were used for testing the dimensional stability. Using chemically cured acrylic resin, the construction of ten special trays was done. All the impression casts were randomly divided into two study groups, with 45 casts in each group.group I: control group, casts were removed after 60 minutes; group II: study group, casts were removed after 9 hours. A digital caliper was used for measuring the dimensional stability of the cast. All the data were collected and analyzed. Results In the specimens of the control group (group I) and the study group (group II), the mean dimensions from y to y' were found to be 17.54 and 17.95 respectively. The mean reading of hardness in the control group and study group was found to be 0.59 and 0.20 respectively. In groups I and II, the number of specimens showing clarity of two lines (X and X”) was 0 and 5 respectively. Conclusion There was no change in the dimensional stability of the dental stone model when the contact time was increased. Clinical significance Within certain limits, the contact time between alginate and stone can be altered without significantly altering the properties of the cast. How to cite this article Dev S, Kar AK, Garhnayak M, Garhnayak L, Dhal A. Assessment of Influence of Contact Time between Alginate and Type III Dental Stone on Properties of Cast Model: An in vitro Study. J Contemp Dent Pract 2017;18(10):911-914.

APA, Harvard, Vancouver, ISO, and other styles

38

S.R, Shari, Harshakumar K., Kavitha Janardanan, Litty Francis, and Sariga Kanagaraj. "CORRELATION OF THE DISTANCE BETWEEN PTERYGOMAXILLARY NOTCHES AND THE COMBINED WIDTH OF MAXILLARY ANTERIOR TEETH IN DENTATE SUBJECTS - AN OBSERVATIONAL ANALYTICAL STUDY." International Journal of Advanced Research 10, no. 07 (July 31, 2022): 1094–101. http://dx.doi.org/10.21474/ijar01/15134.

Full text

Abstract:

Purpose: The objective of this study was to find the correlation of the distance between pterygomaxillary notches and the combined width of maxillary anterior teeth.Material &Methods:One hundred and twenty-six maxillary dentulous impressions were made (18-50 years old) using metallic stock tray and irreversible hydrocolloid impression material, then poured in dental stone. The distance between Pterygomaxillary notches and the mesiodistal width of six maxillary anterior teeth were measured by digital vernier calliper on a dental stone cast. The mean of the measurements was statistically analysed using Pearsons correlation co-efficient. Results: The mean distance between pterygomaxillary notches was 39.5 Â± 3.7mm and the mean of combined width of six maxillary anterior teeth was 45.5 Â± 2.A moderately significant correlation was found for the distance between pterygomaxillary notches and the combined width of maxillary anterior teeth (p<0.01, r=0.335).Only 11.2 percent of the samples showed a correlation between the combined width of maxillary anterior teeth and the distance between the pterygomaxillary notches. Conclusions: The relation between the combined width of maxillary anterior teeth and distance between the pterygomaxillary notches was significant (p<0.01). The distance between pterygomaxillary notches can influence the size of maxillary anterior teeth along with other factors.It was concluded that for every 1mm increase in the distance between the pterygomaxillary notches, there will be a 0.18mm increase in the dimension for the combined width of maxillary anterior teeth.Distance between pterygomaxillary notches is a reliable method for the selection of maxillary anterior teeth. Clinical Relevance To Interdisciplinary Dentistry: 1. This can be used for teeth selection in patients with nasal, eye defects where inter-alar/ inter-pupillary width is not reliable. 2. This correlation can be applied to any restorative procedures involving rehabilitation of maxillary anterior teeth.

APA, Harvard, Vancouver, ISO, and other styles

39

Dhanda, Aaina, Tarun Kalra, Manjit Kumar, Ajay Bansal, and Ruchi Sharma. "Implant Impression Making: Take-Off Guide for Beginners." Dental Journal of Advance Studies 09, no. 03 (November 10, 2021): 121–27. http://dx.doi.org/10.1055/s-0041-1736489.

Full text

Abstract:

AbstractDental implants are fixtures that constitute for the replacements of the root of a missing natural tooth. Dental implant therapy has been widely used for the restoration of partially and fully edentulous patients. The implant literature emphasizes the importance of a passively fitting prosthesis to prevent prosthodontic complications or even loss of fixture integration. Failure to achieve a passively fitting prosthesis and force tightening of superstructure may result in complications such as abutment, framework, and gold screw loosening or fracture. Various materials that can be used for making an implant impression are polyether, polyvinylsiloxane, condensation silicone, polysulfide, irreversible hydrocolloid material, and various others. There are various studies in relation to the accuracy of these impression materials out of which various scientists concluded different results with most studies stating polyether with the maximum amount of dimensional accuracy in comparison to other materials. An accurate implant impression plays a significant role and serves as a starting point in the process of producing good working casts. Thus, the accuracy of impression techniques becomes a significant issue in consideration of passive fit. Reproduction of intraoral relationship of implants through impression procedures is the first step in achieving accurate fit prosthesis. This transference is still complicated by the number, angulation, depth, and position of implants. The advent of computer-aided design/computer-assisted manufacturing technology improved the framework fabrication procedures and has increased the precision of fit of implant prosthesis.

APA, Harvard, Vancouver, ISO, and other styles

40

Shrestha, Ashwin, S. R. B. Mathema, S. K. Maharjan, and S. L. Kam. "Dimensional Relationship between Maxillary Anterior Teeth and Inter Hamular Distance." Journal of Nepalese Prosthodontic Society 1, no. 2 (December 31, 2018): 75–79. http://dx.doi.org/10.3126/jnprossoc.v1i2.23860.

Full text

Abstract:

Introduction: Selection of anterior teeth for the fabrication of artificial denture during Prosthodontic rehabilitation is a complex process. Different authors have suggested various methods, however no single method can be used reliably to select artificial teeth. This study aims to assess dimensional relationship of maxillary anterior teeth with inter hamular distance which may assist in the artificial teeth selection. Materials and methods: This clinical study was carried out on 95dentate subjects meeting the inclusion criteria. Prior to impression making, hamular notch was located precisely with T-burnisher and was marked with indelible pencil. Impression of maxillary arch was made using irreversible hydrocolloid impression material and casts were poured using Type III dental stone. Measurements were made directly on the cast using digital vernier caliper. The contact point widths of maxillary right and left maxillary central incisors, lateral incisors and canines were measured. The distance between the right and left hamular notch was measured. The sum of contact point widths of all maxillary anterior teeth was calculated. All the data were recorded and statistically analyzed. Result: There is a positive correlation between combined width of maxillary anterior teeth and inter-hamular notch distance with Pearson’s correlation coefficient (r) 0.217 and p value 0.035 which is statistically significant. Conclusions: There is significant correlation between combined width of maxillary anterior teeth and distance between right and left hamular notch. This correlation is valuable and practicable in estimating the six maxillary anterior teeth width.

APA, Harvard, Vancouver, ISO, and other styles

41

Fatahillah, Ali Surahman, Michael Josef Kridanto Kamadjaja, and Harry Laksono. "Immediate Complete Overdenture – A case report." Indonesian Journal of Dental Medicine 1, no. 1 (March 31, 2018): 31. http://dx.doi.org/10.20473/ijdm.v1i1.2018.31-34.

Full text

Abstract:

Background: Edentulousness resulting from extraction of teeth often leads to psychological problem and social isolation of the patient. The patient has to adapt to the situation with respect to speech, chewing, swallowing, and so forth. A smooth transition from dentulousness to edentulousness is the result of immediate over denture with a few retained teeth. Purpose: to report overdenture prevents alveolar ridge bone absorption, stabilizes a denture, and makes the typical sensory function to be looked closer to natural teeth. Case: A 79-year-old female complaint of missing multiple teeth and desire to replace them. Extraoral examination and temporomandibular joint movement were normal. Five teeth (12,11,21,22,34) exhibited grade II mobility with diagnosis apical chronic periodontitis. Radiographic examination is an overview of diffuse radiolucent on the apical on the teeth 17,13,12,11,21,22,34. Case Management: First, make a diagnostic impressions of the maxillary and mandibular with irreversible hydrocolloid then poured in dental stone. After that, the final impressions were taken and poured in dental stone, casts mounted on articulators. Bite registration was done after using bite rim and bite registration material. The next step is setting up the artificial teeth then tried to the patient. Five teeth (12,11,21,22,34) were trimmed from the casts on the functional model. The patients tooth 12, 11, 21,22 and 34 were reduced to a dome shape only 2 mm above gingival margin then restored with GIC on the surface. The denture was then placed immediately after reduced. Discussion: The selected abutments teeth were reduced to a dome shape only 2 mm above gingival margin. This will create adequate space for the overlying artificial denture tooth and denture base. Also, it reduces the lateral stresses and lever action of the tooth. The retained tooth roots, used for overdenture, transfers occlusal forces to the alveolar bone through the periodontal ligament and maintain alveolar ridge morphology. Conclusion: Overdenture can be used to prevents alveolar ridge bone absorption, stabilizes a denture, and makes the typical sensory function to be looked closer to natural teeth.

APA, Harvard, Vancouver, ISO, and other styles

42

Baxter, RT, NC Lawson, D. Cakir, P. Beck, LC Ramp, and JO Burgess. "Evaluation of Outgassing, Tear Strength, and Detail Reproduction in Alginate Substitute Materials." Operative Dentistry 37, no. 5 (September 1, 2012): 540–47. http://dx.doi.org/10.2341/11-365-l.

Full text

Abstract:

SUMMARY Objective To compare three alginate substitute materials to an alginate impression material for cast surface porosity (outgassing), tear strength, and detail reproduction. Materials and Methods Detail reproduction tests were performed following American National Standards Institute/American Dental Association (ANSI/ADA) Specification No. 19. To measure tear strength, 12 samples of each material were made using a split mold, placed in a water bath until testing, and loaded in tension until failure at a rate of 500 mm/min using a universal testing machine. For cast surface porosity testing, five impressions of a Teflon mold with each material were placed in a water bath (37.8°C) for the in-mouth setting time and poured with vacuum-mixed Silky Rock die stone at 5, 10, 30, and 60 minutes from the start of mixing. The gypsum samples were analyzed with a digital microscope for surface porosity indicative of hydrogen gas release by comparing the surface obtained at each interval with four casts representing no, little, some, and significant porosity. Data analysis was performed using parametric and Kruskal-Wallis analysis of variance (ANOVA), Tukey/Kramer post-hoc tests (α=0.05), and individual Mann-Whitney U tests (α=0.0167). Results All alginate substitute materials passed the detail reproduction test. Tear strength of the alginate substitute materials was significantly better than alginate and formed three statistically different groups: AlgiNot had the lowest tear strength, Algin-X Ultra had the highest tear strength, and Position Penta Quick had intermediate tear strength. Significant variation in outgassing existed between materials and pouring times (p<0.05). All alginate substitute materials exhibited the least outgassing and cast porosity 60 minutes after mixing. Conclusions Detail reproduction and tear strength of alginate substitute materials were superior to traditional alginate. The outgassing effect was minimal for most materials tested. Alginate substitute materials are superior replacements for irreversible hydrocolloid.

APA, Harvard, Vancouver, ISO, and other styles

43

Begum, Shahnaj, Mahenaz Munira, Fakrul Islam, Hasina Mahmuda Ferdushi, and Alia Sultana. "Comparative Study on Dimensional Stability of Polyvinylsiloxane and Alginate as Interocclusal Recording Materials." Update Dental College Journal 7, no. 1 (July 24, 2017): 10–13. http://dx.doi.org/10.3329/updcj.v7i1.33303.

Full text

Abstract:

Introduction: The fabrication of dental prosthesis requires the transfer of interocclusal records from patient's mouth to an articulator using different kinds of recording materials. Any inaccuracy in these interocclusal records leads to occlusal error in the final prosthesis. Interocclusal recording materials should have good dimensional stability for precise articulation.Purpose: The aim of this in vitro study was to evaluate and compare the dimensional stability of two types of interocclusal recording materials at various time intervals.Materials and Methods: The materials used in this study were polyvinylsiloxane (Reprosil Silicone Putty) and alginate (irreversible hydrocolloid). In this experimental study, specimen of polyvinylsiloxane and alginate were prepared from a custom made stainless steel die according to ADA specification no-19, in the form of a disk included three parallel lines on the surface which were provided as an indicator to see the dimensional stability of tested materials. The distance between parallel lines was measured at two fixed points using a traveling micrometer microscope. A total of 20 samples were made from group-A and group-B consisting of ten samples of each group. The measurements were made at time intervals of 1, 24, 48 and 72 hrs.Results: Two readings were taken for each sample at each time interval and the mean was considered to measure the dimensional change by comparing with that of the original measurements in the die. The results obtained were statistically analyzed using SPSS version 12 and paired t test. The result of significance was expressed as p value. P value <0.05 was considered as significance. Both materials showed significant changes ie <0.05.Conclusion: Dimensional stability is influenced by both the material used and the time factors and was found to decreased dimensional stability as the time factors increased. Group A was dimensionally stable than Group-B.Update Dent. Coll. j: 2017; 7 (1): 10-13

APA, Harvard, Vancouver, ISO, and other styles

44

Trivedi, Roopsi, Rajashekar Sangur, Lakshmana Rao Bathala, Shitij Srivastava, Srishti Madhav, and Preeti Chaubey. "Evaluation of efficacy of Aloe Vera as a Disinfectant by Immersion and Spray methods on Irreversible Hydrocolloid Impression Material and its Effect on the Dimensional Stability of Resultant Gypsum Cast - An in Vitro Study." Journal of Medicine and Life 12, no. 4 (October 2019): 395–402. http://dx.doi.org/10.25122/jml-2019-0050.

Full text

Abstract:

The need to use a natural alternative for disinfecting dental impression materials, which should be biocompatible and effective, led us to evaluate the efficacy of Aloe vera as a disinfectant by immersion and spray method on alginate impression material and its effect on the dimensional stability of the resultant gypsum cast. The efficacy of the disinfection procedures against Staphylococcus aureus, Pseudomonas aeruginosa, and Candida albicans was evaluated by determining the number of colony-forming units (CFU) recovered after disinfection of alginate discs inoculated with 1x106 CFU for defined intervals with aloe vera solution (99.96%). Dimensional stability was determined from the mean percentage deviation of three measurements that were taken between the fixed points on the casts using a traveling microscope and compared with corresponding measurements from the master model and controls. Statistical analysis of data was determined by analysis of variance. We found out that there is a mean percentage reduction in colony count of S. aureus, P. aeruginosa, and C. albicans after 3 minutes of immersion in aloe vera and after 3 minutes spray disinfection. Complete elimination of all the microorganism cells after 7 min immersion and spray disinfection. There was a statistically significant difference in the increase of the mean anteroposterior (AP) and cross arch (CA) dimension after 3 and 7 minutes immersion in aloe vera. Spraying with aloe vera for 7 minutes was proved to be the most effective disinfection procedure without altering dimensional stability.

APA, Harvard, Vancouver, ISO, and other styles

45

Borges de Olival, Antonio, Nilton da Penha Junior, João Câmara, Ana Corrêa Duarte Simões, José Estruc Verbicário dos Santos, and Sonia Groisman. "Analysis of Chemical Composition of Different Irreversible Hydrocolloids." Dentistry Journal 6, no. 3 (August 2, 2018): 37. http://dx.doi.org/10.3390/dj6030037.

Full text

Abstract:

Irreversible hydrocolloids (IR) is a dental impression material commonly used in Brazilian and European dental practice because it is inexpensive, easy to handle, has good reproductive detail and is comfortable for the patient. This research aimed to analyze the chemical composition of eight different IRs for dental use. A sample of 0.2 g was weighed and transferred to a Teflon beaker moistened with drops of distilled or deionized water; 5 mL of nitric acid was added until total solubility of the sample; the solution was transferred to a 100 mL volumetric flask, the volume was filled with distilled or deionized water and homogenized. Thirty-five chemical elements were found: Lithium, Beryllium, Boron, Sodium, Magnesium, Aluminum, Silicon, Phosphorus, Potassium, Titanium, Manganese, Cobalt, Nickel, Vanadium, Zinc, Rubidium, Arsenic, Iron, Copper, Strontium, Yttrium, Zirconium, Niobium, Molybdenum, Ruthenium, Cadmium, Tin, Antimony, Barium, Lanthanum, Cerium, Mercury, Lead, Thorium and Uranium. Only one of the samples contained no Nickel, Antimony and Lead; and Arsenic and Uranium were found in 2 samples. This study provided evidence of high toxicity of the IR brands, pointing out the need for better quality control of this product, in order to prevent health damage in dentists, prosthesis technicians and patients.

APA, Harvard, Vancouver, ISO, and other styles

46

Mosharraf, Ramin, Sina Shafa, and Zeinab Zaree. "The Effects of Custom Tray Material on the Accuracy of Master Casts." Journal of Contemporary Dental Practice 9, no. 6 (2008): 49–56. http://dx.doi.org/10.5005/jcdp-9-6-49.

Full text

Abstract:

Aim In addition to the impression material, the type of impression tray influences the accurate dimensional transfer of the size and position of the teeth to the master cast. The aim of this study was to determine the accuracy of master casts produced from an alginate impression material using a visible-light-curing resin and autopolymerizing polymethyl methacrylate resin custom tray materials. Methods and Materials Two types of custom trays were fabricated from a stainless steel master model with three index studs. Twenty-two irreversible hydrocolloid impressions were made of the master model and then poured with a Type III dental stone. The distances between the reproduced index studs were measured to +/- 0.01 mm with a digital caliper. A one-way analysis of variance (ANOVA) and T-test were used for data analysis. Results There were no significant differences between the two tray materials for any of the three distances. There were no statistical differences between the master model and the casts made from the two tray materials in the length dimension, but there were significant differences in the vertical dimension. In terms of the width dimension there was a significant difference only between the cold curing group and the master model. Conclusion Within the limitations of this study, the dimensions of stone casts poured from an impression made using a light-cured tray did not differ significantly from those created from impressions made using autopolymerizing acrylic trays. However, working dies from the light-curing tray impressions were more accurate buccolingually than those from the autopolymerizing acrylic trays. Clinical Significance The accuracy of master cast reproduction using visible-light-curing resin or an autopolymerizing polymethyl methacrylate resin custom tray material is acceptable. Although autopolymerizing resin materials require less equipment and are relatively more inexpensive, light-cure tray materials may be the material of choice for custom tray fabrication due to greater accuracy in the buccolingual dimension. Citation Shafa S, Zaree Z, Mosharraf R. The Effects of Custom Tray Material on the Accuracy of Master Casts. J Contemp Dent Pract 2008 September; (9)6:049-056.

APA, Harvard, Vancouver, ISO, and other styles

47

Queiroz, Mariana Elias, Juliana Santos Proença, and Edwin Fernando Ruiz Contreras. "Evaluation of the Physical-Mechanical Properties of Type IV Gypsum." Journal of Health Sciences 23, no. 1 (March 18, 2021): 07–11. http://dx.doi.org/10.17921/2447-8938.2021v23n1p07-11.

Full text

Abstract:

AbstractThe purpose of this study was to evaluate a physical property (surface roughness) and a mechanical property (microhardness) of four type IV gypsum. 40 specimens were prepared from a metal matrix that reproduced an edentate upper alveolar ridge. They were divided into 4 groups (n = 10 Clone (G3), Durone(G4), SSWhite (G2), Asfer (G1) and submitted to roughness and microhardness tests . The obtained data were submitted to statistical analysis. By the Kolmogorov-Smirnov test it was verified that there was non-parametric distribution of the samples. The non-parametric Kruskal-Wallis and Mann-Whitney-U tests were applied in hardness and roughness data. In microhardness group 3(Clone) presented the best values (103.0 HV). In surface roughness (Ra), group 3(Clone) and Group 2 (SSWhite) showed the lowest values (1.8 m) and all evaluated groups presented higher values than those found in metallic matrix (baseline). It was concluded that gypsum models obtained from molds with irreversible hydrocolloid are rougher than molded surface, regardless of the commercial brand. The samples made with the Clone gypsum (G3) have the highest microhardness. Keywords: Calcium Sulfate. Hardness. Dental Materials. ResumoO objetivo desse trabalho foi avaliar uma propriedade física (rugosidade superficial) e uma propriedade mecânica (microdureza) de quatro marcas comerciais de gesso tipo IV. Foram confeccionados 40 corpos de prova a partir de uma matriz metálica que reproduzia um rebordo alveolar superior edentado. Os mesmos foram divididos em 4 grupos (n=10), de acordo com as marcas comerciais (Clone, Durone, SSWhite, Asfer), e submetidos aos testes de rugosidade e microdureza superficial utilizando um rugosímetro e um microdurômetro respectivamente. Os dados obtidos foram computados e submetidos à análise estatística. Pelo teste de Kolmogorov-Smirnov verificou-se que não houve distribuição Normal das amostras. Dessa forma foram aplicados os testes não paramétricos de Kruskal-Wallis e Mann-Whitney-U em ambas as análises. Na microdureza, a marca comercial Clone apresentou os melhores valores (103,0). Já na rugosidade superficial as marcas comerciais Clone e SSWhite apresentaram os menores valores (1,8). Ainda em relação à rugosidade superficial, as marcas comerciais avaliadas apresentaram valores maiores que os encontrados na matriz metálica. Concluiu-se que modelos em gesso obtidos a partir de moldes com hidrocolóide irreversível apresentam-se mais rugosos que a superfície moldada, independente da marca comercial avaliada. Os modelos em gesso confeccionados com a marca Clone apresentam melhor microdureza superficial. Palavras-chave: Sulfato de Cálcio. Dureza. Materiais Dentários.

APA, Harvard, Vancouver, ISO, and other styles

48

Fathurrahman, Helmi, Titik Ismiyati, Suparyono Saleh, and Haryo Mustiko Dipoyono. "Pembuatan Prothesa Telinga dengan Metode Pencetakan Tiga Lapis." Majalah Kedokteran Gigi Indonesia 21, no. 1 (June 1, 2014): 78. http://dx.doi.org/10.22146/majkedgiind.8776.

Full text

Abstract:

Defek telinga unilateral ataupun bilateral dapat disebabkan oleh berbagai faktor, diantaranya trauma, kelainan pertumbuhan, atau prosedur pengangkatan kanker. Kondisi ini akan mempengaruhi psikologis pasien karena telinga merupakan organ vital yang membentuk estetika wajah. Salah satu perawatan rehabilitasi pada defek telinga adalah dengan pembuatan protesa telinga. Tahapan penting dari pembuatan protesa telinga adalah mendapatkan cetakan yang akurat untuk membuat pola malam. Teknik pencetakan dalam pembuatan prothesa telinga diantaranya metode reversible hydrocolloid dengan sendok cetak malam, irreversible hydrocolloid dengan sendok cetak kaku dan metode pencetakan tiga lapis. Keunggulan teknik pencetakan tiga lapis adalah mudah di lakukan dan akurasi hasil pencetakan yang baik. Tujuan laporan kasus ini adalah mengaplikasikan teknik pencetakan tiga lapis dalam pembuatan prothesa telinga.Perawatan dilakukan pada seorang pria berusia 14 tahun yang mengalami defek kongenital telinga dextra (unilateral). Langkah pertama dalam pembuatan prothesa yaitu pencetakan telinga normal dan defek, dilanjutkan pembuatan pola malam dan basis protesa, kemudian tahap try in pola malam, processing silikon, dan insersi. Prosedur pencetakan telinga dengan teknik tiga lapis yaitu mengaplikasikan irreversible hidrocolloid pada regio post aurale (lapisan pertama), regio pra aurale, permukaan internal, (lapisan kedua), dan permukaan luar telinga (lapisan ketiga). Hasil pencetakan telinga dengan teknik tiga lapis adalah tiga lapisan irreversible hidrocolloid yang solid dan mudah untuk dipisahkan sehingga menjamin akurasi hasil pengecoran. Kesimpulan laporan kasus ini adalah teknik pencetakan tiga lapis dapat diaplikasikan dalam pembuatan prothesa telinga.Triple Layer Impression Method For Auricular Prosthesis. An unilateral or bilateral auricular defect can be caused by several factors including trauma, congenital malformation or surgical removal of neoplasm. These condition will affect patient psycologic because ear is a vital part of facial aesthetic. One of rehabilitation care of auricular defect is an auricular prosthesis. Important stage of making auricular prosthesis is to obtain accurate impression to make wax pattern. Impression technique including method of reversible hydrocolloid with wax collar, irreversible hydrocolloid with rigid tray and triple layer impression method. The excellence of the triple layer impression technique are easy to do and accuracy of good impression result. The aim of this case report is to apply triple layer impression method in the making of auricular prosthesis. The treatment was done in 14 years old male patient with chief compain of congenitally defect of external dextra ear. First step of making auricular prosthesis is making an impression of defect area and opposite ear, making prothesa basis and wax pattern, try in the wax pattern, sillicone processing, and insertion the prothesa. Triple layer impression method was done in three step, first the impression material was injected to post aurale region (first layer), than injected to internal surface of ear (second layer). Subsequently, the third layer of impression material was partially filled into the tray and external surface of ear.The result of triple layer impression method in the making of auricular prosthesis is triple layer of solid irreversible hydrocolloid but separatable completly. Conclusion of this case report is the triple layer impression method is suitable for making an auricular prosthesis.

APA, Harvard, Vancouver, ISO, and other styles

49

Tavarez, Rudys Rodolfo de Jesus, Etevaldo Matos Maia-Filho, Adriana Santos Malheiros, Oswaldo Serra Santos-Neto, Shelon Cristina Souza Pinto, Flavio das Neves, Leticia Machado Gonçalves, and Matheus Coelho Bandeca. "Dimensional stability of stored extended-pour irreversible hydrocolloids materials." Research, Society and Development 10, no. 16 (December 11, 2021): e192101623338. http://dx.doi.org/10.33448/rsd-v10i16.23338.

Full text

Abstract:

The purpose of this study was to evaluate the linear dimensional stability of four extended-pour irreversible hydrocolloids (EPIHs). Material and Methods: Five samples per material (Cavex ColorChange, Cavex Orthotrace, Jeltrate Plus, and Orthoprint) were prepared following the manufacturers’ instructions. The samples were prepared using a cylindrical matrix coupled with a nylon-polyamide ring. Two parallel, 25-mm equidistant lines were made on its surface following ANSI/American Dental Association (ADA) Specification 18 for plaster reproducibility and compatibility and Specification 19 for linear dimensional change. The samples were stored in an environment with a relative humidity of 70% (± 3) and temperature of 28°C (± 2). Photo images were obtained using a digital camera to record images for 120 hours, with a standardized distance of 80cm between the lens and the specimen. Adobe Photoshop CS3 software was used for the measurement of the recorded images. The measurements refer to the equivalent distance between the two parallel lines printed on the samples. Data were analyzed using one-way analysis of variance (ANOVA) and Tukey’s test for multiple comparisons between the means of the groups. Results: There was no statistically significant difference (p > 0.05) when EPIHs were compared at the same time of evaluation. Orthoprint, Cavex Orthotrace, and Cavex Colorchange presented with least dimensional stability up to 24 hours (p > 0.05) of storage, followed by Jeltrate Plus (48 hours). Conclusions: Storage of EPIHs for more than 24 hours for Cavex ColorChange and 48 hours for others EPIHs studied produces significant dimensional changes in the impressions stored at a humidity of 70% (± 3) and temperature of 28°C (± 2). Extended storage times produce large dimensional changes.

APA, Harvard, Vancouver, ISO, and other styles

50

Cervino, Gabriele, Luca Fiorillo, Alan Herford, Luigi Laino, Giuseppe Troiano, Giulia Amoroso, Salvatore Crimi, et al. "Alginate Materials and Dental Impression Technique: A Current State of the Art and Application to Dental Practice." Marine Drugs 17, no. 1 (December 29, 2018): 18. http://dx.doi.org/10.3390/md17010018.

Full text

Abstract:

Hydrocolloids were the first elastic materials to be used in the dental field. Elastic impression materials include reversible (agar-agar), irreversible (alginate) hydrocolloids and synthetic elastomers (polysulfides, polyethers, silicones). They reproduce an imprint faithfully, providing details of a high definition despite the presence of undercuts. With the removal of the impression, being particularly rich in water, the imprints can deform but later adapt to the original shape due to the elastic properties they possess. The advantages of using alginate include the low cost, a better tolerability on the part of the patient, the ease of manipulation, the short time needed for execution, the instrumentation and the very simple execution technique and possibility of detecting a detailed impression (even in the presence of undercuts) in a single step. A comprehensive review of the current literature was conducted according to the PRISMA guidelines by accessing the NCBI PubMed database. Authors conducted a search of articles in written in English published from 2008 to 2018. All the relevant studies were included in the search with respect to the characteristics and evolution of new marine derived materials. Much progress has been made in the search for new marine derived materials. Conventional impression materials are different, and especially with the advent of digital technology, they have been suffering from a decline in research attention over the last few years. However, this type of impression material, alginates (derived from marine algae), have the advantage of being among the most used in the dental medical field.

APA, Harvard, Vancouver, ISO, and other styles

Journal articles on the topic 'Dental irreversible hydrocolloid'

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles