Littérature scientifique sur le sujet « Oral lubrication »
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Articles de revues sur le sujet "Oral lubrication"
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Sarkar, Anwesha, Efren Andablo-Reyes, Michael Bryant, Duncan Dowson et Anne Neville. « Lubrication of soft oral surfaces ». Current Opinion in Colloid & ; Interface Science 39 (février 2019) : 61–75. http://dx.doi.org/10.1016/j.cocis.2019.01.008.
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Rodrigues, S. A., N. Selway, M. P. Morgenstern, L. Motoi, J. R. Stokes et B. J. James. « Lubrication of chocolate during oral processing ». Food & ; Function 8, no 2 (2017) : 533–44. http://dx.doi.org/10.1039/c6fo00950f.
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Higham, Susan M. « Patient preferences of an intra-oral lubricating device over other dry mouth lubrication methods ». British Dental Journal 193, no 7 (octobre 2002) : 394. http://dx.doi.org/10.1038/sj.bdj.4801574.
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Austin, William, Maryam Hdeib, Paige Fraser, Maya Goldchtaub, Elika Shams, Tianyi Han, Pierre-Luc Michaud et Vahid Adibnia. « Oral Lubrication, Xerostomia, and Advanced Macromolecular Lubricants for Treatment of Dry Mouth ». Lubricants 12, no 4 (12 avril 2024) : 126. http://dx.doi.org/10.3390/lubricants12040126.
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Dry mouth, also known as xerostomia, is a condition in which insufficient or ineffective saliva does not provide sufficient oral lubrication. The severity of this condition can vary from a mild discomfort to a debilitating condition that greatly impairs patients’ lives. Xerostomia arises as a side effect of various medications, diseases, radiation therapy, chemotherapy, or nerve damage. Various aqueous dispersions of macromolecules have been proposed to assist or replace the saliva in these patients. It is vital that these macromolecules have ample lubricity and water retention properties while showing long-lasting efficacy. The emphasis of this review is to provide a general overview on lubricating macromolecules that have been clinically used or reported in the literature as potential replacements for saliva. These include various natural or synthetic polymers, proteins, peptides, and lipids that are used in the form of solutions, gels, emulsions, and colloids. Perspectives into the future of macromolecular oral lubricants in the treatment of xerostomia are also provided.
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Sharma, Prashant K., Jeroen Vinke, Marijn Oude Elberink, Monique A. Stokman, Frans G. M. Kroese, Kamran Nazmi, Floris J. Bikker, Henny C. van der Mei et Arjan Vissink. « Biotribological properties of xerostomia patient saliva and its enhancement ». BIO Web of Conferences 41 (2021) : 02007. http://dx.doi.org/10.1051/bioconf/20214102007.
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The study aimed to quantify the lubricating properties of chewing stimulated whole saliva from healthy controls (n=22), from patients suffering from primary Sjögren’s syndrome (n=37) and from patients undergoing head-and-neck radiotherapy (n=34). Materials and Methods All participants had to complete the Xerostomia Inventory questionnaire to score dry mouth sensation. Lubrication was measured using an ex vivo tongue-enamel friction system in terms of Relief and Relief period. MUC5b and total protein concentrations of the saliva samples were measured by an enzyme-linked immunosorbent assay and a bicinchoninic acid assay, respectively. Results Relief of Sjögren’s patients saliva and post-irradiation patients saliva was similar compared with healthy controls, but saliva from post-irradiation patients lubricated significantly better than saliva from Sjögren’s patients. The Relief period was similar between the three groups. The Relief and Relief period were higher for saliva samples post-irradiation compared to pre-irradiation. MUC5b and total protein concentrations were comparable in all groups. MUC5b and total protein output were significantly lower in patients subjected to radiotherapy compared to saliva from healthy controls and pre-irradiation patients. MUC5b concentrations positively correlated with lubricating properties of post-irradiation patient saliva. Conclusions The lubricating properties of patient saliva were not any worse than healthy controls. Lower flow rate leads to lower availability of saliva in the oral cavity and decreases the overall output of protein and MUC5b, which might result in an insufficient replenishing of the mucosal salivary film. Clinical Relevance An insufficient replenishing might underlie the sensation of a dry mouth and loss of oral function. In the talk I will explain biomaterials related strategies, yet ex vivo, to enhance salivary lubrication despite of low flowrates.
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Xu, Wenhu, Qixiang Xu et Min Zhong. « Lubrication study of representative fluid foods between mimicked oral surfaces ». Journal of Texture Studies 53, no 1 (21 novembre 2021) : 96–107. http://dx.doi.org/10.1111/jtxs.12645.
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Carpenter, G., S. Bozorgi, S. Vladescu, A. E. Forte, C. Myant, R. V. Potineni, T. Reddyhoff et S. K. Baier. « A study of saliva lubrication using a compliant oral mimic ». Food Hydrocolloids 92 (juillet 2019) : 10–18. http://dx.doi.org/10.1016/j.foodhyd.2019.01.049.
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Samiyoshi, S., S. Tsutsumi, S. Shimoda et T. Honda. « Biomechanical simulation of the TMJ — Role of lubrication ». International Journal of Oral and Maxillofacial Surgery 26 (janvier 1997) : 272. http://dx.doi.org/10.1016/s0901-5027(97)81642-6.
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Carter, Derrick R., et Jerome C. Donnelly. « The effect of dowel lubrication on retention of resin-cemented dowels ». Journal of Prosthetic Dentistry 72, no 3 (septembre 1994) : 255–58. http://dx.doi.org/10.1016/0022-3913(94)90338-7.
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Almeida, Fabrício Anderson Carvalho, Anna Paula Costa Ponte Sousa Carvalho Almeida, Flávia Lucisano Botelho Amaral, Roberta Tarkany Basting, Fabiana Mantovani Gomes França et Cecilia Pedroso Turssi. « Lubricating conditions : effects on friction between orthodontic brackets and archwires with different cross-sections ». Dental Press Journal of Orthodontics 24, no 2 (avril 2019) : 66–72. http://dx.doi.org/10.1590/2177-6709.24.2.066-072.oar.
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Abstract Objective: This study investigated the effect of the condition of lubrication on the friction between brackets and NiTi archwires of different rounded cross-sections. Methods: Brackets (Roth, GAC) were affixed to a device connected to a universal testing machine into which segments of archwire were placed (NiTi, Nitinol, GAC) with cross-sections of 0.012-in, 0.016-in and 0.020-in. Once the wire was in the bracket slot, the following lubricants were applied: human saliva (HS: positive control), distilled water (DI), mucin-based (MUC) or carboxymethylcellulose-based (CMC) artificial saliva. In the negative control group, no lubricant was used. The combination between the wire cross-sections and the lubrication condition generated 15 groups with 15 samples each. Data were submitted to two-way analysis of variance and Tukey’s test. Results: There was no significant interaction between the wire cross-section and the condition of lubrication (p= 0.901). Irrespective of whether lubricants were used or not, there was a significant increase in friction with an increase in the cross-section of the wire (p< 0.001). For any wire, the group tested in the presence of MUC was not different from that in which HS was applied. On the other hand, when the application of lubricants was suppressed, significantly higher friction values were observed. The CMC group and the DI group demonstrated intermediate behavior. Conclusions: Friction increased with the increase of the cross-section of the NiTi archwire, but regardless of the archwire, friction with MUC artificial saliva was similar to that of HS and lower than in dry conditions.
Thèses sur le sujet "Oral lubrication"
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Ammam, Ianis. « Études et caractérisations tribologiques des mécanismes biophysiques de la lubrification orale ». Electronic Thesis or Diss., Ecully, Ecole centrale de Lyon, 2024. http://www.theses.fr/2024ECDL0042.
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L’étude de la lubrification orale devient une problématique actuelle pour l’industrie agroalimentaire. Les analyses quantitatives permettent de comprendre et d’anticiper des mécanismes physiologiques, tels que la prédiction des phénomènes d’astringence des produits alimentaires. L’astringence se manifeste par une diminution de la lubrification de la muqueuse orale après la consommation de produits d’origine végétale. Cependant, les recherches actuelles sur la lubrification orale s’appuient sur des matériaux synthétiques qui représentent mal les tissus buccaux. Elles négligent les interactions entre les protéines salivaires sécrétées et les protéines transmembranaires, limitant ainsi la compréhension des mécanismes de lubrification.Cette thèse s’inscrit dans le projet MACARON qui vise à étudier le rôle de la muqueuse orale dans la perception sensorielle. Des modèles in vitro de muqueuse orale qui expriment la protéine transmembranaire MUC1 ont été développés pour simuler les interactions fondamentales entre MUC1 et les protéines salivaires. Ces interactions sont responsables de la lubrification et de l’hydratation des tissus. Par ailleurs, un tribomètre a été conçu pour effectuer des tests tribologiques in vitro sur ces modèles d’épithélium afin de suivre leur état de lubrification.Cette thèse se concentre ainsi sur l’étude des mécanismes moléculaires de la lubrification orale à travers une approche tribologique in vitro, en utilisant des paramètres physiques macro et micrométriques. Ce manuscrit propose en premier lieu une étude sur le rôle crucial de la mucine MUC1 et de sa structure dans la lubrification orale. La présence de MUC1 améliore la lubrification grâce à une meilleure rétention des protéines salivaires à la surface cellulaire. Ensuite, le manuscrit présente une exploration des mécanismes moléculaires de l’astringence. Les essais tribologiques in vitro en présence de composés astringents montrent que ces substances forment des agrégations à la surface épithéliale qui diminuent la lubrification orale. Parallèlement, nos travaux montrent que des mécanismes de protection, notamment la dissociation de MUC1 et l’interaction des protéines riches en proline avec les tanins, atténuent ces effets néfastes sur la lubrification.À travers une étude complémentaire, des corrélations entre la perception sensorielle et nos propriétés physiques mesurées sont établies, démontrant la capacité de notre méthodologie à classer des individus selon leur sensibilité à l’astringence. Enfin, la dernière étude présente le développement d’un nouveau modèle de muqueuse orale visant à reproduire les propriétés mécaniques et physico-chimiques de la muqueuse in vivo.Cette thèse propose une méthodologie innovante pour l’étude de la lubrification orale, en particulier en s’intéressant à des mécanismes responsables de la sensation d’astringence grâce à l’utilisation de modèles de muqueuse toujours plus proches des tissus oraux physiologiquesThe study of oral lubrication has become a current concern for the food industry. Quantitative analyses allow for understanding and anticipating physiological mechanisms, such as predicting astringency phenomena in food products. Astringency is characterized by a decrease in oral mucosa lubrication following the consumption of plant-based products. However, current research on oral lubrication relies on synthetic materials that poorly represent oral tissues, neglecting interactions between secreted salivary proteins and transmembrane proteins, thus limiting the understanding of lubrication mechanisms. This thesis is part of the MACARON project, which aims to investigate the role of oral mucosa in sensory perception. In vitro models of oral mucosa expressing the transmembrane protein MUC1 have been developed to simulate fundamental interactions between MUC1 and salivary proteins responsible for tissue lubrication and hydration. Additionally, a tribometer has been designed to perform in vitro tribological tests on these epithelial models to monitor their lubrication state. Thus, this thesis focuses on studying the molecular mechanisms of oral lubrication through an in vitro tribological approach, using macro- and micrometric physical parameters. Firstly, this manuscript provides a study on the crucial role of MUC1 mucin and its structure in oral lubrication. The presence of MUC1 enhances lubrication by improving the retention of salivary proteins on the cell surface. Secondly, the manuscript explores molecular mechanisms of astringency. In vitro tribological tests in the presence of astringent compounds show that these substances form aggregations on the epithelial surface, reducing oral lubrication. Concurrently, our work demonstrates protective mechanisms, including the dissociation of MUC1 and the interaction of proline-rich proteins with tannins, mitigating these adverse effects on lubrication. Through additional study, correlations between sensory perception and our measured physical properties are established, demonstrating the ability of our methodology to classify individuals based on their sensitivity to astringency. Finally, the last study presents the development of a new oral mucosa model aiming to reproduce mechanical and physicochemical properties of in vivo mucosa. This thesis proposes an innovative methodology for studying oral lubrication, particularly focusing on mechanisms responsible for astringency sensation through the use of mucosa models increasingly closer to physiological oral tissues
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Coppo, Priscilla Pessin. « Novo método para o estudo de desgaste por atrição (deslizamento alternado) em esmalte bovino, em função da carga normal e da lubrificação : redução do desgaste com gel lubrificante oral ». Universidade de São Paulo, 2015. http://www.teses.usp.br/teses/disponiveis/23/23140/tde-21092015-152213/.
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O esmalte dental é o tecido mineralizado mais duro do corpo humano; apesar disto, seu desgaste é um problema muito comum. Este pode estar associado aos processos de envelhecimento, ou ainda, ser encontrado em indivíduos jovens, como consequência de atividades parafuncionais, por exemplo, atrição dental. Este tipo de dano pode resultar em prejuízo da função mastigatória e em diminuição da qualidade de vida. Por isto, o desgaste do esmalte dental tem sido objeto de muitos estudos, embora poucos tenham utilizado conceitos tribológicos. Não foi encontrado nenhum estudo que explorasse o desgaste de esmalte e seus micromecanismos oriundos do deslizamento alternado de incisivo contra incisivo, configuração que mais se aproxima do tribossistema real de atrição. O presente estudo tem por objeto investigar o desgaste e seus mecanismos em pares deslizantes de esmalte incisal (configuração pino-plano), selecionados por seus similares valores de dureza e de tenacidade à fratura, submetidos a diferentes cargas normais e lubrificações do meio. Incisivos bovinos foram ensaiados em deslizamento alternado sob duas cargas normais (8 N e 16 N) e quatro modos de lubrificação: saliva natural; saliva artificial; gel lubrificante oral (Oralbalance!, Biotène); e grupo controle sem lubrificação (seco). Durante os ensaios, foram levantadas as curvas de atrito. O volume desgastado e a rugosidade da superfície foram mensurados via perfilometria 3D. Os micromecanismos de desgaste foram analisados ao microscópio eletrônico de varredura. O aumento da carga normal aplicada resultou em aumento do volume de desgaste para todas as condições. Comparando-se ao grupo sem lubrificação, as salivas (natural e artificial) não reduziram o desgaste, mas a lubrificação com o gel foi efetiva para reduzir tanto o volume de esmalte desgastado como o coeficiente de atrito. A relação entre o valor do parâmetro de rugosidade Sq e o coeficiente de atrito não foi linear, nem entre a rugosidade Sq e o coeficiente de desgaste, para todas as condições. Os micromecanismos de desgaste encontrados foram, em ordem crescente de severidade: desgaste da região interprismática (8 N - gel); propagação de trincas interprismáticas (8 N - seco); reações triboquímicas associadas à ação mecânica (8 N - saliva natural e artificial; 16 N - gel; 16 N - saliva natural e artificial); e desplacamento (16 N - seco).Enamel is the hardest mineralized tissue in the human body; despite that, the enamel wear is a very common problem. The wear damage can be related to aging processes or also be found in young people as a result of parafunctional activities, for example, dental attrition. This type of damage can result in loss of masticatory function and decreased quality of life. Therefore, the wear of the enamel has been the subject of many studies, although few have used tribological concepts. The wear mechanisms of reciprocating sliding pairs from incisor against incisor have not been reported in the literature, this configuration is the one that is closest to the real tribosystem of attrition. The present study aims to investigate the wear behavior and the related mechanisms in reciprocating sliding pairs of incisal enamel (pin-on-flat configuration), selected for their similar hardness and fracture toughness values, with different applied normal loads and lubrication conditions. Bovine incisors were tested in reciprocating sliding with different applied normal loads (8 N and 16 N) and four lubrication conditions: natural saliva; artificial saliva; oral gel lubricant (Oralbalance!, Biotène); and control group (dry). During tests, the friction curves were recorded. The volume loss and the surface roughness Sq were investigated by 3D profilometry. Wear mechanisms were analyzed by scanning electron microscope. The increase of the normal load resulted in an increased volume loss for all conditions. Comparing to the group without lubrication, the saliva (natural and artificial) did not reduce the volume loss, but the lubricant gel was effective to reduce both the volume loss and the coefficient of friction. The relationship between the value of the roughness Sq and the friction coefficient was not linear, nor between the roughness Sq and the wear coefficient for all conditions. In increasing order of severity, the micromechanisms of wear were: wear at the interrod enamel (8 N - gel); crack propagation in the interrod enamel (8 N - dry); tribochemical reactions associated with mechanical wear (8 N - natural saliva and artificial saliva; 16 N - gel; 16 N - natural saliva and artificial saliva); and flake-like wear (16 N - dry).
Livres sur le sujet "Oral lubrication"
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Kazimierz, Pieczonka, dir. Zagadnienia tarcia i smarowania oraz komputeryzacji projektowania zespołów maszynowych. Wrocław : Wydawn. Politechniki Wrocławskiej, 1989.
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DeAugustinas, M., et A. Kiely. Periocular Infections. Oxford University Press, 2016. http://dx.doi.org/10.1093/med/9780199976805.003.0015.
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Periocular Infections occur when there is inflammation of the conjunctiva. Uncomplicated viral infections can usually be managed with careful hand hygiene and lubrication of the eye with artificial tears. More severe infections are notable for purulent discharge, membrane formation, and scarring, and can lead to corneal change. For suspected bacterial conjunctivitis, empiric therapy begins with broad spectrum antibiotic eye drops or ointment, which are supplemented with oral antibiotics in cases associated with pharyngitis and in children with H. influenzae infection. For gonococcal conjunctivitis, systemic ceftriaxone is recommended for both adults and children (including neonates) due to the increasing prevalence of penicillin-resistant N. gonorrhoeae. If the cornea is not involved and the patient is extremely reliable, next day referral to an ophthalmologist in addition to management with IM ceftriaxone is sufficient. Otherwise, admission for IV therapy is advised. Copious, repeated irrigation is also advised to remove inflammatory mediators and debris that can contribute to corneal melting.
Chapitres de livres sur le sujet "Oral lubrication"
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Yakubov, Gleb E. « Lubrication ». Dans Monographs in Oral Science, 71–87. Basel : S. KARGER AG, 2014. http://dx.doi.org/10.1159/000358790.
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Agni, Nisheet Anant. « Salivary Gland Pathologies ». Dans Oral and Maxillofacial Surgery for the Clinician, 939–73. Singapore : Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-15-1346-6_46.
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AbstractSaliva is responsible for various functions from lubrication to digestion. The saliva is secreted by numerous minor and major salivary glands. These salivary glands are sometimes affected by various local and systemic inflammatory conditions, obstructive pathologies with benign and malignant tumors. This chapter deals with various pathologies of salivary glands and their management.
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Wang, Qi, Yang Zhu et Jianshe Chen. « Tribometers for Studies of Oral Lubrication and Sensory Perception ». Dans Food Texturology : Measurement and Perception of Food Textural Properties, 217–42. Cham : Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-41900-3_11.
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« Oral Lubrication ». Dans Encyclopedia of Tribology, 2488. Boston, MA : Springer US, 2013. http://dx.doi.org/10.1007/978-0-387-92897-5_100974.
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Fuller, Jennifer, et Shakeel Shahdad. « Dental-related disease ». Dans Oxford Textbook of Sjögren's Syndrome, sous la direction de Elizabeth J. Price et Anwar R. Tappuni, 87–94. Oxford University Press, 2021. http://dx.doi.org/10.1093/med/9780198806684.003.0012.
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Saliva contains a complex mixture of organic and inorganic molecules, enabling it to play many roles within the oral cavity, including lubrication, protection of the mucosa and maintenance of dental hard tissues, antibacterial activity, digestion, and taste perception. Hyposalivation in Sjögren’s syndrome (SS) patients leads to dry mouth, rampant dental caries, increased risk of oral infections, difficulty in speaking and swallowing food, and dysgeusia (altered taste perception). SS patients have higher rates of decayed, missing, and filled teeth and increased rates of edentulousness. Rehabilitation with dental prosthesis for these patients can be problematic, as this can increase the risk of plaque stagnation and further dental disease, leading to failure of treatment. Saliva is pivotal in retention of certain types of dental prosthesis and protection of mucosal damage. SS patients may benefit from implant-retained prosthesis. In this chapter dental disease in SS patients and appropriate management are discussed.
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« Applied Physiology of the Parotid Gland ». Dans Diagnostic Techniques and Therapeutic Strategies for Parotid Gland Disorders, 24–33. IGI Global, 2021. http://dx.doi.org/10.4018/978-1-7998-5603-0.ch004.
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The major function of salivary glands is the production of saliva, which performs many functions including lubrication of the food bolus, maintaining the oral cavity pH within 6 to 7, maintaining teeth integrity, fighting bacteria, aiding taste and digestion, and providing a continuous lavaging biofilm for the oral cavity. Saliva is actively produced in high volumes relative to the mass of the salivary glands and is almost completely controlled extrinsically by both parasympathetic and sympathetic divisions of the autonomic nervous system. Some researchers used bilateral tympanic neurectomy for patients with ptyalism (drooling) with good initial results. Others advocated bilateral parotid duct rerouting ± bilateral submandibular gland excision for long-term treatment of drooling. Intra-glandular Botulinum toxin may also have good results for patients with hyper-sialorrhea. Most resting salivary gland flow arises from the submandibular glands and surgery should focus on this gland to control uncontrolled sialorrhea.
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Camilleri, Michael. « Gastrointestinal Physiologic and Motility Problems in Older Persons : Constipation, Irritable Bowel Syndrome, and Diverticulosis ». Dans Mayo Clinic Illustrated Textbook of Neurogastroenterology, 321–36. Oxford University Press, 2021. http://dx.doi.org/10.1093/med/9780197512104.003.0014.
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Aging affects motor and sensory functions throughout the gut. In the pharynx and esophagus, the changes can result in dysphagia and aspiration. As people age, swallow is slower as a result of abnormalities in the oral phase of swallowing, reduced lingual propulsive force, dry mouth with diminished pharyngeal lubrication, and delayed upper esophageal sphincter opening. Aging also affects functional reserve of the proximal esophagus, anus, and pelvic floor and leads to motility disturbances in older persons, manifesting mainly as high dysphagia, constipation, and fecal incontinence, especially in the presence of prior obstetric damage. Older patients may have reversible, nonmalignant disease and can be restored to health through proper management.
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Singh, Harpreet, et Kirandeep Kaur. « Biotribology : Recent advancements, Applications, Challenges and Future Directions ». Dans Metal Matrix Composites : A Modern Approach to Manufacturing, 147–75. BENTHAM SCIENCE PUBLISHERS, 2024. http://dx.doi.org/10.2174/9789815223439124010008.
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Tribology deals with basic principles and understanding of three concepts: friction, wear, and lubrication. Now, bio tribology is one of the most exhilarating fields of tribological study. In this book chapter, the authors made efforts to review and provide brief thoughts about the various sections of the biotribology such as orthopedics, artificial implants, biomimetics, bio-lubricants, biomaterials, ocular tribology, skin tribology, haptics, dental tribology, sports tribology. Apart from these, biotribology deals with a few more exciting areas i.e., in personal care like skin creams, cosmetics, etc., and oral processing studies such as mouthfeel and taste perception. This comprehensive review comes to a close with four studies, i.e., bio-friction of the biological systems, tribology of medical and surgical devices, biocompatibility issues related to biomaterials, and critical aspects of bio-tribocorrosion. A critical review of bio-friction studies for the various biological systems is presented, and significant underlying tribological-lubrication mechanisms are also discussed. The present emphasis and forthcoming advancements of the various medical and surgical instruments in context with the fundamental tribology principles and pertaining mechanisms for an efficient, versatile, and multi-functional bio-system will be discussed in this book chapter. Furthermore, major challenges faced by R&D officials and medical teams are discussed. Biocompatibility and bio-tribo-corrosion of biomaterials are serious concerns in bio tribology. In-depth discussions of current trends, implementations, and their guidelines for the future are also included. In a nutshell, bio tribology studies can contribute noteworthy scientific, social, engineering, and healthcare benefits; the openings and possibilities are significant.
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Roy, Dr Arani, et Prof Dr Soumyabrata Sarkar. « BIOTRIBOLOGY ». Dans Futuristic Trends in Medical Science Volume 2 Book 22, 281–88. Iterative International Publishers, Selfypage Developers Pvt Ltd, 2023. http://dx.doi.org/10.58532/v2bs22p4ch5.
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The teeth are the body part that is toughest. The anatomical and chemical makeup of teeth is quite distinctive. The scientific field of tribology examines lubrication, friction, and wear. It is desirable to assess the material qualities, chemical compositions of various materials, and tooth structure in order to comprehend the wear behaviour of human teeth. Human teeth erode quite gradually. Tooth wear is a multifactorial phenomenon that combines physical, chemical, and mechanical processes, in addition to being a complicated process. The tribological behaviour of teeth is greatly influenced and determined by the oral environment in which we live. The wear processes of artificial materials used in dentistry are rather sophisticated given the intricate biomechanics and intraoral environment. Abrasion, attrition, fretting wear, corrosion, and fatigue are some of the main wear mechanisms in our mouth cavity. Various combinations of these activities result in the slow surface deterioration of materials in the oral cavity. Excessive wear may cause early failure, necessitating the replacement of dental implants and restorations. Even though we have achieved incredible progress in the area of dental wear, there is still more research and analysis that needs to be done. This will enable us to develop a bionic design, a tribological design-based therapeutic therapy against dental wear, and a systematic correlation between the tribological behaviour and structure of human teeth. Eventually, more and more study trajectories will point us in the direction of a better treatment prognosis. So maybe these talks will shed some light and offer more information about what has previously been discovered about human teeth
Actes de conférences sur le sujet "Oral lubrication"
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Kew, Ben, Anwesha Sarkar, Evan Liamas et Jatin Sharma. « Modifying plant proteins as microgels for fat replacement applications ». Dans 2022 AOCS Annual Meeting & Expo. American Oil Chemists' Society (AOCS), 2022. http://dx.doi.org/10.21748/vqyk1732.
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With obesity being an increasing health concern, replacements of calorie-dense fat in diet is a necessity. Proteinaceous microgels have recently been found to have ultra-lubricating properties and are hypothesised to act as excellent fat replacers. However, such microgels have not been applied to more sustainable plant protein which is often associated with generating high friction in between oral contact surfaces and consequently generate astringency issues. The aim of this study was to design novel ultra-lubricating microgels using plant proteins and compare lubrication performance of various volume fractions (10-70 vol%) to that of a fat emulsion. An array of characterisation techniques combining oral tribology using 3D biomimetic tongue surface , rheology, dynamic light scattering (DLS), atomic force microscopy (AFM) and quartz crystal microbalance with dissipation (QCM-D) were used to characterise these newly designed microgels and their surface properties. Potato protein microgels at 5 and 10 wt% protein (PoPM5, PoPM10), pea protein microgel at 15 wt% protein (PePM15) and combined alternative protein microgel at 12.5 wt% (Po5:Pe7.5) were prepared at pH 7.0 by thermally crosslinking the proteins at 80°C for 30 minutes to form gels, followed by shearing. AFM and DLS revealed that microgels were sub-micron sized ranging in diameter from 85 to 232 nm with low polydispersity (‰¤ 0.25) . The microgels were relatively soft with storage modulus varying from 0.35 to 6.5 kPa. Irrespective of the type of proteins used, the microgel dispersions presented excellent lubrication performance especially owing to their adsorption properties as well as high effective viscosities. Strikingly, PePM15 microgels had similar friction coefficient values to that of the 20 wt% oil-in-water emulsion when introduced between 3D biomimetic tongue-like surface. Thus, we demonstrate for the first time that these sustainable protein microgels allow better incorporation of alternative protein in low calorie food without any negative mouthfeel consequences.
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Padgurskas, Juozas. « Title Pages of Conference Proceedings of BALTTRIB 2015 ». Dans International Stientific Conference "BALTTRIB 2015". Aleksandras Stulginskis University, 2015. http://dx.doi.org/10.15544/36.
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International conferences BALTTRIB are organised by the scientists of Institute of Power and Transport Machinery Engineering of Aleksandras Stulginskis University (ASU) together with other tribologists of Lithuania and other Baltic region researchers. Conferences BALTTRIB took place in 1999, 2001, 2005, 2007, 2009, 2011, 2013 and 2015. The conferences are organised by ASU, Lithuanian Scientific Society Department „Tribologija“ and International Tribology Council. About 70-100 scientists from 15-25 countries are regularly participating at the conferences. Newest results of tribological research are discussed and presented in oral and poster presentations during the conferences. The companies are presenting their technological equipment for tribological research. The proceedings of the conferece are registered in international databases of research papers. The last conference BALTTRIB 2015 was the most effective bi-annual platform for the interdisciplinary scientific discussions and the presentations of new ideas for tribology in the context of knowledge, innovations and technological progress. The topics of the Conference cover main fields of tribological research: • Friction and wear of friction pairs in agricultural, transport and industrial machinery; • Lubrication and lubricants; • Micro- and nano-scale tribology; • Tribochemistry; • Bio-tribology; • Environmental issues in tribology; • Surface science and coating engineering; • Tribological materials; • Tribology in metal processing; • Simulation of tribological processes; • Experimental methods in tribology. The oral reports and the BALTTRIB 2015 papers were divided in 4 sections: Lubrication and lubricants; Surface processing and surface science; Friction and wear in tribosystems; Tribological materials. The BALTTRIB 2015 proceedings include 32 peer-reviewed papers and contributions from 91 author. In total was received 50 submissions for the Conference.
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Chu, Yifu, et Lingyun Chen. « The effect of uniform whey protein microgels on oil-in-water emulsion property improvements and their potential application as fat replacers to prepare fat-reduced food products ». Dans 2022 AOCS Annual Meeting & Expo. American Oil Chemists' Society (AOCS), 2022. http://dx.doi.org/10.21748/txeh2871.
Texte intégralRésumé :
Protein-based microgels have the potential to mimic the oral lubrication properties of fat droplets at the fat-oral surface. As food proteins contribute to only 4 kcal per gram with high satiation, protein microgels are highly expected to be used as fat substitutes to develop novel low-calorie food, as a strategy against obesity prevalent. In our lab, we developed a facile method to fabricate uniform whey protein microgel with controllable size by modulating the protein-polysaccharide interactions. The microgel system (containing microgels, polysaccharides and unconcerted protein molecules) can stabilize oil-in-water emulsion with long-term stability and strong texture. The individual contributions of microgel, protein and polysaccharide will be discussed and the microgels can work both at the interface and in the bulk phase to improve the emulsion properties. Without any molecule surfactants such as protein molecules, the microgel alone can serve as an efficient Pickering stabilizer that can form oil-in-water Pickering emulsion with long-term stability and strong elasticity through strong hydrophobic interactions. When the interfacial layer is dominated by protein molecules, the microgels are dispersed in the bulk phase and the jamming effect brought by the microgels between the oil droplets effectively prevents flocculation and coalescence and strengthens the emulsion textures. This effect can make 30% oil emulsions show similar rheological and flow behavior to emulsions containing 50% oil. These results demonstrate that the protein microgel system has the potential for food applications in preparing €œlow fat€ emulsion-based food formulations with a comparable texture to that of full-fat counterparts.
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Thaweboon, Sroisiri, Ratchaporn Srichan, Supaporn Mala et Boonyanit Thaweboon. « The Development of Artificial Saliva with Oral Wound Healing Property ». Dans 2023 7th International Conference on Nanomaterials and Biomaterials & 2023 5th Asia Conference on Material and Manufacturing Technology. Switzerland : Trans Tech Publications Ltd, 2024. http://dx.doi.org/10.4028/p-wc6acn.
Texte intégralRésumé :
Wound healing is a normal biological mechanism of the body that helps to maintain the integrity of the tissue. In this process, fibroblasts play an important role in supporting wound healing by migrating to the injury site and laying down a new extracellular matrix. Oral wounds heal more rapidly than skin wounds due to the presence of saliva. However, a reduced salivary flow rate or hyposalivation is frequently found in some patients due to their systemic conditions or intake of various medications. In order to control or treat hyposalivation, the use of artificial saliva is recommended for these patients. Various agents were added to artificial saliva to improve its properties. The aim of the present study was to investigate the effect of artificial saliva containing vanillin on the wound healing of human gingival fibroblasts by inducing cell migration in vitro. Human gingival fibroblasts isolated from human gingiva were purchased from Scien Cell Research Laboratories, USA. The migratory ability of fibroblasts was performed on a confluent monolayer by the wound healing scratch assay. Artificial saliva with different concentrations of vanillin (0.12% to 4% w/v) was added and incubated for 24 h. Artificial saliva without vanillin was used as a control. The migration cells were fixed with 25% methanol and 0.2% toluidine blue. In vitro cell migration to the wound area was determined by photographing with an inverted microscope coupled to a digital camera (Nikon D 5100). In the presence of 0.25%, 0.5%, and 1% w/v vanillin-containing artificial saliva, human gingival fibroblasts had a significantly higher potential to migrate into the wound area than a control (p-value <0.05). Data from this study provides the first scientific evidence to demonstrate the benefits of using artificial saliva containing vanillin to maintain healthy gums and accelerate oral wound healing. Rinsing the mouth with this artificial saliva is recommended as the most preferable method for moistening and lubricating the mouth and facilitating the healing of oral wounds in patients with hyposalivation.
Rapports d'organisations sur le sujet "Oral lubrication"
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Qu, Jun, Yan Zhou, Huimin Luo, Todd J. Toops, Daniel W. Brookshear, Benjamin C. Stump, Michael B. Viola, Khaled Zreik et Tasfia Ahmed. ORNL-GM : Development of Ionic Liquid-Additized, GF-5/6 Compatible Low-Viscosity Oils for Automotive Engine and Rear Axle Lubrication for 4% Improved Fuel Economy. Office of Scientific and Technical Information (OSTI), janvier 2017. http://dx.doi.org/10.2172/1342688.
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