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Ferreira, I. D. L., and I. S. Oliveira. "Efetividade de Materiais Reembasadores em Prótese Total: uma Revisão de Propriedades." Journal of Health Sciences 19, no. 5 (February 23, 2018): 33. http://dx.doi.org/10.17921/2447-8938.2017v19n5p33.
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Este estudo visa avaliar as propriedades e, por conseguinte, a eficácia dos reembasadores definitivos e temporários, de acordo com as necessidades específicas de cada paciente. Utilizou-se as bases de dados BVS e Scielo, com os descritores: denture liners, complete denture, dental materials, encontrando-se 23 artigos publicados no período entre 2012 e 2016, sendo 12 selecionados através da análise dos objetivos e resultados alcançados, a fim de levantar dados que propusessem uma avaliação da durabilidade e propriedades mecânicas dos reembasadores. Os materiais de reembasamento do tipo rígido, geralmente utilizados nas técnicas de reembasamento definitivo, conhecidos como “hard liners” apresentam menor porosidade e propagação de calor, maior longevidade e equilíbrio na coloração, se comparado às resinas resilientes, também chamadas de “soft liners”, mais comuns na utilização de técnicas de reembasamento temporário. A eficiência dos materiais de reembasamento é medida por meio da capacidade de adesão a base da prótese, biocompatibilidade, ausência de desgaste na coloração, dimensão estável e propriedade insípida e inodora. A indicação dos materiais e a técnica utilizada, portanto, apresenta especificidade a depender do caso clínico.Palavras-chave: Denture Liners. Complete Denture. Dental Materials.
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Rahal, Juliana Saab, Bruna Jussara Constantino Locks, Marcelo Feraz Mesquita, Guilherme Elias Pessanha Henriques, and Mauro Antônio Arruda Nóbilo. "Biofilm formation on complete denture liners." Journal of Research in Dentistry 3, no. 1 (September 14, 2015): 583. http://dx.doi.org/10.19177/jrd.v3e12015583-591.
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AIM: To clinically evaluate biofilm growth on 4 liners in complete denture base surfaces of 20 geriatric patients. MATERIAL AND METHODS: Patients received new complete maxillary dentures prepared with 4 chambers (10x10x2 mm) in the tissue surface of acrylic denture base. Each of the 4 chambers was randomly filled with the following denture liners: Eversoft (M1); Kooliner (M2); GC Reline Extra Soft (M3); Elite Soft Relining (M4). Patients were randomly separated into 2 treatment groups: T1- sanitization with soft brush and dentifrice; T2- similar to T1 with daily immersion in cleansing chemical solution (Ortoform). Patients had 8 follow-up sessions over a 3-month period. The internal denture surface was stained with a dental plaque dye at each of the follow-up visits. Standardized photographs were taken, and biofilm growth was scored. Data were tabulated and submitted to Analysis of Variance. Means were compared by Tukey (p<0.05) and T tests. RESULTS: Kooliner (M2) means were significantly different from the others for both groups T1 and T2. Treatment 1 promoted higher biofilm growth scores than treatment 2. The highest score after treatment 1 was Kooliner (M2) and the lowest was Elite Soft Relining (M4). As for treatment 2, Eversoft (M1) was statistically different from Elite Soft Relining (M4). Again, Kooliner (M2) presented the highest score and Elite Soft Relining (M4) the lowest. Kooliner (M2) was statistically different from both GC Reline Extra Soft (M3) and Elite Soft Relining (M4). CONCLUSION: Of the materials and treatments studied, the best clinical selection for lower biofilm growth scores would be Elite Soft Relining (M4) with treatment 2.
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Oliveira, Luciana Valadares, Marcelo Ferraz Mesquita, Guilherme Elias Pessanha Henriques, Rafael Leonardo Xediek Consani, and Wagner Sotero Fragoso. "The compatibility of denture cleansers and resilient liners." Journal of Applied Oral Science 14, no. 4 (August 2006): 286–90. http://dx.doi.org/10.1590/s1678-77572006000400014.
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PURPOSE: Difficulty in cleaning resilient denture liners remains a material disadvantage. The purpose of the present study was to evaluate the effect of denture cleansers on hardness of resilient liner materials. MATERIALS AND METHODS: Three resilient liners, Luci Sof® (Dentsply), Molloplast-B® (Dentax), and Sofreliner® (Tokuyama), and two denture cleansers, Efferdent® (Warner-Lamber), and 0.5% alkaline hypochlorite preparation were used. Twenty specimens of each material were prepared, measuring 25X15X3mm. Two denture cleansing approaches were used: 1) alkaline hypochlorite, for 20 minutes; 2) alkaline peroxide, for 30 minutes. This procedure was repeated 8 times a day, during 90 days. The specimens were evaluated before and after 360 and 720 cycles, to simulate 1 and 2 years of clinical cleaning procedures, respectively. The Shore A hardness was evaluated in a durometer (Teclock GS-709A), with a penetrating load of 10N for 1 second. Any macroscopic changes, such as loss of color or alteration in surface texture were recorded by one observer. All numeric data were subject to ANOVA with repeated measures followed by Tukey's test (alpha= 0.05). RESULTS: All materials were significantly different, independently to time and treatment. Initially, Luci Sof® and Sofreliner® immersed in either hypochlorite or peroxide increased the hardness mean values significantly. These hardness mean values decreased significantly after 720 cycles. Molloplast-B® showed no significant difference after the treatments, in any time. CONCLUSIONS: Denture cleansers had no effect on hardness of the resilient denture liners evaluated after 2 years of in vivo simulated conditions of hygiene. Sofreliner® was the smoothest material before and after all treatments.
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Yankova, Mariana, Todor Peev, and Bozhidar Yordanov. "BASIC PROBLEMS WITH THE USE OF RESILIENT DENTURE LINING MATERIALS: LITERATURE REVIEW." Journal of IMAB - Annual Proceeding (Scientific Papers) 27, no. 2 (May 11, 2021): 3723–30. http://dx.doi.org/10.5272/jimab.2021272.3723.
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Complicated cases in the treatment of totally edentulous patients, as well as in the fabrication of obturators and epitheses, require the use of resilient lining materials (RLMs). These materials have several disadvantages, which is why many dental practitioners do not recommend them. The tendency to breaking the bond between the hard acrylic resin and the resilient liner is a fact with unpleasant consequences, mainly found with the use of cold-curing silicone-based resilient liners. Methods to improve the bond between the hard denture base and the RLM have been the subject of numerous publications. The efforts of the authors are focused in two directions: mechanical or chemical treatment of the denture base or a combination of both. Other commonly discussed problems with the use of RLMs are the difficult and even impossible repair and the retention of oral fluids, fungi and other microorganisms due to the porosity of RLMs. Despite the wide variety of tools offered by different manufacturers, the issue of optimal and high-quality mechanical treatment of the polymerized resilient material has not yet been fully resolved.
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Kreve, Simone, and Andréa C. Dos Reis. "Denture Liners: A Systematic Review Relative to Adhesion and Mechanical Properties." Scientific World Journal 2019 (March 3, 2019): 1–11. http://dx.doi.org/10.1155/2019/6913080.
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Purpose. The objective of this systematic review is to compare results concerning the properties of adhesion, roughness, and hardness of dental liners obtained in the last ten years. Methods. Searches on the databases LILACS, PubMed/Medline, Web of Science, and Cochrane Database of Systematic Reviews were supplemented with manual searches conducted between February and April of 2018. The inclusion criteria included experimental in vitro and in vivo, clinical, and laboratory studies on resilient and/or hard liners, assessment of hardness, roughness, and/or adhesion to the denture base, and physical/mechanical changes resulting from the disinfection process and changes in liners’ composition or application. Results. A total of 406 articles were identified and, from those, 44 are discussed. Twenty-four studies examined the bond strength, 13 surface roughness, and 19 the hardness. Of these 44 studies, 12 evaluated more than one property. Different substances were used in the attempt to improve adhesion. Considering roughness and hardness, the benefits of sealants have been tested, and the changes resulting from antimicrobial agents’ incorporation have been assessed. Conclusion. Adhesion to the prosthesis base is improved with surface treatments. Rough surfaces and changes in hardness compromise the material’s serviceability.
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Strajnic, Ljiljana, Miodrag Djokic, and Predrag Vucinic. "Contemporary methods and mobile denture cleansers and theirs significance for older population." Medical review 64, no. 9-10 (2011): 497–502. http://dx.doi.org/10.2298/mpns1110497s.
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Introduction. A dramatic increase in the number of people living in their seventies, eighties and nineties is associated with a loss of teeth and the use of mobile dentures. The aim of this paper was to highlight the consequences of poor denture hygiene on oral and general health in vulnerable elderly people, in long-term hospitalized elderly patients and in long-term institutionalized elderly in nursing homes. Denture deposits and consequences of poor denture hygiene. The number of bacteria living in the mouth is getting larger after putting denture on. Namely, a small ?space? develops between jaw and denture, creating perfect conditions for bacterial growth. Denture becomes a ?reservoir? of micro-organisms. Denture deposits such as bacterial plaque, fungi, tartar and remnants could be responsible for: stomatitis prothetica, cheilitis angularis, inflammatory fibrous hyperplasia, halitosis (bad breath), dental caries in mobile denture carriers, mucositis and periimplantitis in mobile implant over-dentures carriers, accelerated destruction of denture materials for underlying, such as denture base soft liners, respiratory airways diseases, bacterial endocarditis and gastrointestinal infections. Removal of denture deposits. It is recommendable to combine mechanical and chemical denture cleaning. Denture submersion into a commercial cleansing solution for less than one hour is an effective cleaning method. Commercial cleansers specifically intended for dentures with metal parts should be used for those dentures. Commercial cleansers with a new component of silicon polymer, whose thin layer surrounds all denture surfaces and disables oral bacteria to agglomerate, are effective and useful. Preventive hygienic treatments are very important in hospitals and homes for the aged, bearing in mind that old and ill persons reside here. Those institutions are recommended to get equipped with ultrasound denture cleaners. Importance of written brochure on proper denture hygiene. Patients should be verbally instructed and showed about cleaning techniques, but also written instructions in form of brochure should be distributed in order to achieve better effects.
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Balos, Sebastian, Tatjana Puskar, Michal Potran, Bojana Milekic, Daniela Djurovic Koprivica, Jovana Laban Terzija, and Ivana Gusic. "Modulus, Strength and Cytotoxicity of PMMA-Silica Nanocomposites." Coatings 10, no. 6 (June 23, 2020): 583. http://dx.doi.org/10.3390/coatings10060583.
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Key advantages of Poly(methyl methacrylate)—PMMA for denture application are related to aesthetics and biocompatibility, while its main deficiency is related to mechanical properties. To address this issue, SiO2 nanoparticle reinforcement was proposed, containing 0 to 5% nanosilica, to form nanocomposite materials. Flexural strengths and elastic moduli were determined and correlated to nominal nanoparticle content and zeta potential of the liquid phase nanoparticle solutions. Another issue is the biocompatibility, which was determined in terms of cytotoxicity, using L929 and MRC5 cell lines. The addition of nanoparticle was proved to be beneficial for increasing flexural strength and modulus, causing a significant increase in both strength and moduli. On the other hand, the formation of agglomerates was noted, particularly at higher nanoparticle loadings, affecting mechanical properties. The addition of nanosilica had an adverse effect on the cytotoxicity, increasing it above the level present in unmodified specimens. Cytotoxic potential was on the acceptable level for specimens with up to 2% nanosilica. Consequently, nanosilica proved to be an effective and biocompatible means of increasing the resistance of dental materials.
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Nicholson, J. W. "Glass-ionomers in medicine and dentistry." Proceedings of the Institution of Mechanical Engineers, Part H: Journal of Engineering in Medicine 212, no. 2 (February 1, 1998): 121–26. http://dx.doi.org/10.1243/0954411981533890.
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This paper describes the current uses and future prospects for glass-ionomer cements in dentistry and medicine. Glass-ionomers divide into two chemical types, one is known as self-hardening and sets entirely by a neutralization reaction to give relatively brittle materials, the other is known as resin-modified and sets partly by polymerization and partly by neutralization to give slightly tougher materials. Compared with the self-hardening cements, these latter materials have improved aesthetics and easier clinical handling. Both types bond well to enamel and dentine, and release clinically useful amounts of fluoride. They have been used in a variety of applications in dentistry, including as liners/bases, luting cements for stainless steel crowns, and in various restorative procedures for both permanent and primary teeth. The resin-modified glass-ionomers are particularly promising for these latter uses, though it is too soon to be sure how durable they will prove to be over the longer term. Self-hardened glass-ionomers have been shown to have much better biocompati-bility than resin-modified glass-ionomers in a variety of situations and consequently they have been used for various non-dental applications, such as ear, nose and throat surgery and craniofacial reconstruction.
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Hussein, Farouk Ahmed. "Advances in Soft Denture Liners: An Update." Journal of Contemporary Dental Practice 16, no. 4 (2015): 314–18. http://dx.doi.org/10.5005/jp-journals-10024-1682.
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ABSTRACT Soft denture liners are used in complete and partial removable dentures to distribute functional loads homogeneously on the denture-bearing tissues. These materials are recommended in cases of irregular bone resorption, bony undercuts, thin atrophic mucosa, immediate prosthesis, healing after implant placement, and for patients with bruxism and xerostomia. The resilient lining materials can be categorized as plasticized acrylic resins or silicone elastomers. The plasticized acrylic resin comprises of acrylic polymers and copolymers, a liquid containing an acrylic monomer and plasticisers, such as ethyl alcohol and/or ethyl acetate responsible for preserving the material softness. The silicone elastomers, consisting of dimethylsiloxane polymers, with a chemical composition similar to that of the silicone impression materials devoid of leachable plasticisers, retain their elastic properties for prolonged periods. Most of the currently available materials have several disadvantages, including color stability, long-term resiliency, abrasion resistance, bond strength and porosity. Several modifications have been done recently to overcome of these disadvantages of the soft liners. The current review summarizes the recent developments in soft liners. How to cite this article Hashem MI. Advances in Soft Denture Liners: An Update. J Contemp Dent Pract 2015;16(4):314-318.
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Djordjevic, Maja, Branislav Karadjic, and Predrag Jovanic. "Analysis of adhesion characteristics of liner dental materials." Chemical Industry and Chemical Engineering Quarterly 19, no. 2 (2013): 165–72. http://dx.doi.org/10.2298/ciceq120309051d.
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Adhesive characteristics of materials used in dental practice are determined by indirect methods, by measuring mechanical properties of liner materials. In that procedure, the adhesion is defined by using measured mechanical properties of the bond material-test sample, which has several shortages. In the presented research the focus was based on the multi-component, composite, materials, which have, both organic and inorganic components in their structures. The direct measure of material-dentine bond was used in order to quantify the adhesion properties of investigated liner materials. Artificial saliva was the media for inducing the liner-dentine bond destruction. Destruction measurements were made by applying the quantification of visual information methodology. Obtained results were used to calculate the adhesion coefficient of the liner materials. The results were correlated with the mechanical test. There are no references on comparative testing of adhesion mechanical properties of dental material in the literature with presented methodology. The presented methodology proved to be useful for the functional quality ranking of dental materials.
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Herla, Maike, Klaus Boening, Heike Meissner, and Katarzyna Walczak. "Mechanical and Surface Properties of Resilient Denture Liners Modified with Chitosan Salts." Materials 12, no. 21 (October 26, 2019): 3518. http://dx.doi.org/10.3390/ma12213518.
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Chitosan (CS) and its derivatives show antibacterial and antifungal properties and could help treat and prevent denture stomatitis (DS). Mechanical and surface properties of resilient denture liners were evaluated when modified with CS salts. CS-hydrochloride (CS-HCl) and CS-glutamate (CS-G) were added to resilient denture liners Ufi Gel P and Coe-Soft at four different concentrations (0.1%, 0.2%, 0.4%, 1% w/w) from which specimens were produced, as well as a control group of each material with no added CS salt. Ten specimens per group (Ø 35 mm, height 6 mm) were manufactured. They were stored in distilled water at 37 °C for a total of 30 days (d). Shore A hardness (SHA) and surface roughness (Ra) were evaluated after 24 h (T1), 7 d (T2), 14 d (T3) and 30 d (T4). Kruskal–Wallis and U-test (Bonferroni-Holm adjusted) were used for statistical analysis (p ≤ 0.05). Ra increased significantly once CS salts were added. SHA increased significantly for some groups, but all specimens fulfilled requirements set by ISO 10139-2:2016. Modification with CS salts does not influence the mechanical properties of the modified resilient denture liners in a clinically relevant manner. Despite the increased roughness, the concept is suitable for further studies. Especially antimicrobial/antibiofilm studies are needed.
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Demir, Hakan, Koray Soygun, Giray Bolayir, Arife Dogan, Selda Keskin, and Orhan Murat Dogan. "Effects of Different Denture Cleansers on the Tensile Bond Strength of Denture Liners." Journal of Adhesion 85, no. 12 (December 2009): 941–52. http://dx.doi.org/10.1080/00218460903309999.
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Reddy, N. Simhachalam, Nallala Amarendra Reddy, A. Kaleswara Rao, and Siddesh Kumar. "The Effect of Denture Cleansers on Resiliency of Soft Lining Materials." Journal of Contemporary Dental Practice 14, no. 1 (2013): 65–70. http://dx.doi.org/10.5005/jp-journals-10024-1272.
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ABSTRACT Aim The present study was undertaken to determine the effect of denture cleansers on resiliency of soft liner. Materials and methods Two soft liners (Molloplast-B and Refit) and two denture cleansers (Clinsodent and Fittydent) were taken. Cylindrical aluminum dies were constructed of 12 mm length and 8 mm diameter at the ratio of 1.5:1. The samples are tested with Hounsfield tensometer. Observation and results Effect of both the denture cleansers on the lining materials was shown in the form of Graphs 1 and 2. The elastic recovery of Molloplast B in dry, Fittydent and Clinsodent is comparatively more than refit, but in control group the elastic recovery of both the material is almost equal. Conclusion Heat processed soft liners recover faster/better in a shorter time interval when compared to self-processed liners which takes longer time for the recovery. This time period is very important as the cushioning effect of the soft liner require an elastic recovery between the masticatory strokes. Clinical implications Greater the softness and better the elastic recovery of the denture soft liner, more effective would be its performance clinically. Silicon based material, such as Molloplast-B, rebounds quickly and would seem preferable to a material that is acrylic based. It is possible that, if the response is too slow or the elastic recovery is less, there may only be a partial recovery of the lining between the masticatory strokes. Progressive thinning of the lining materials might then occur resulting in a reduced cushioning effect.
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Sugio, C. Y. C., C. R. Garcia, T. Y. Ueda, R. A. Silva, L. A. S. Coelho, V. S. Lara, and K. H. Neppelenbroek. "Temporary denture liners modified by medicinal plants on candidal biofilm." Dental Materials 34 (2018): e119-e120. http://dx.doi.org/10.1016/j.dental.2018.08.249.
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Tata, Sreeharsha. "A Clinical Study to Evaluate and Compare the Masticatory Performance in Complete Denture Wearers with and without Soft Liners." Journal of Contemporary Dental Practice 13, no. 6 (2012): 787–92. http://dx.doi.org/10.5005/jp-journals-10024-1230.
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ABSTRACT Aims and objectives Soft liners are mainly used with complete dentures in case of poor mucosal conditions and for the even distribution of masticatory forces. However, there is some doubt as to whether the elasticity of the soft liner disturbs masticatory function because denture wearers may need extra force to compress the soft liners, leading to muscle fatigue. So, this clinical study was done to evaluate and compare the masticatory performance in patients wearing complete dentures with and without the use of soft liners. Materials and methods Twenty edentulous subjects were selected for the study. For each patient two sets of complete dentures were fabricated. First set without the use of soft liner and the second one for using with soft liner. Peanuts were selected as test food for the study and the chewed food was pooled for a single measurement and then poured on sieves. Both filter and filtrate were collected and was centrifuged. Masticatory performance in this study has been quantitated by dividing the volume of test food passing through the sieve by the total volume of test food recovered. The fraction is then expressed as a percent. Results With the paired t-test performed, significant difference was found between the masticatory performance in patients wearing complete dentures with and without the use of soft liners. 5% difference was seen in the mean performance. Conclusion It has been concluded from this study that, masticatory performance in patients wearing complete dentures with the use of soft liners was improved by 5% when compared to the patients wearing complete dentures without using soft liners. Clinical significance This present study indicates that the masticatory performance enhanced with the use of soft liners for complete denture patients. How to cite this article Tata S, Nandeeshwar DB. A Clinical Study to Evaluate and Compare the Masticatory Performance in Complete Denture Wearers with and without Soft Liners. J Contemp Dent Pract 2012;13(6):787-792.
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Reddy, K. Srinivas, N. Venugopal Rao, C. Satyanageshwar Rao, S. Sreedhar Reddy, G. Maruthi Prasad, and Madhukeshwara S. Naik. "A Study to Evaluate and Compare the Shear Bond Strength of Resilient Liners with Heat Cure Denture Base Resins, with and without the Effect of Saliva: An in vitro Study." Journal of Contemporary Dental Practice 13, no. 3 (2012): 394–400. http://dx.doi.org/10.5005/jp-journals-10024-1157.
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ABSTRACT Aim To evaluate and compare the shear bond strength of resilient liners with heat cure denture base resins in the presence or absence of saliva. Materials and methods Two commercially available heat polymerized acrylics and three commercially available denture liners were immersed in artificial saliva for 7 days and 14 days, respectively. A total of 180 (Acralyn-H, No.90 and Lucitone - 199, No.90) specimens were prepared. Total of 90 overlapping joint specimens were prepared, 45 of them using Acralyn H (AGroup) and rest 45 using Lucitone-199 (L-Group). The specimens were tested for flexural strength with a 3-point bending test on an Instron universal testing machine. The results were analyzed with a one-way analysis of variance (ANOVA). Results The mean difference in shear bond strength (SBS) at different time intervals was found to be statistically significant (p < 0.001). Lucitone-199 recorded a significantly higher mean SBS compared to Acralyn H (p < 0.001). Further, significant differences between GC and Densply, GC and Aswin liners, and between Dentsply and Aswin were noted (p < 0.001). Difference between baseline and 7 days time interval, as well as, between baseline and 14 days time interval with respect to the mean SBS of these materials were significant (p < 0.001). Also, the mean difference in SBS between 7 days time interval and 14 days time interval was statistically significant (p < 0.001). Among the three different liners, GC yielded a higher mean SBS compared to Aswin and Dentsply at all the three time intervals. The mean SBS recorded in Dentsply and Aswin was almost same at 14 days time interval, but at baseline and 7 days, it was higher in Aswin compared to Dentsply. Conclusion Lucitone-199 recorded a higher mean SBS compared to Acralyn H. As the time interval increases, the mean SBS recorded in both the denture base materials decrease. Among the three different liners, GC yields a higher mean SBS compared to Aswin and Dentsply at all the three time intervals. Clinical significance The most common reason for failures of resilient linings in removable dentures is the separation of these linings from the denture base. Therefore, poor adhesive bond properties are one of the serious defects of the material in clinical practice. How to cite this article Rao CS, Reddy SS, Prasad GM, Reddy KS, Rao NV, Naik MS. A Study to Evaluate and Compare the Shear Bond Strength of Resilient Liners with Heat Cure Denture Base Resins, with and without the Effect of Saliva: An in vitro Study. J Contemp Dent Pract 2012;13(3):394-400.
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Ansarifard, Elham, Zahra Zareshahrabadi, Najmeh Sarafraz, and Kamiar Zomorodian. "Evaluation of Antimicrobial and Antibiofilm Activities of Copper Oxide Nanoparticles within Soft Denture Liners against Oral Pathogens." Bioinorganic Chemistry and Applications 2021 (June 4, 2021): 1–7. http://dx.doi.org/10.1155/2021/9939275.
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Objectives. Soft denture liners provide a favorable environment for adhesion and colonization of microorganisms. This in vitro study aimed to examine the efficacy of different concentrations of copper oxide nanoparticles (CuO NPs) incorporation into soft denture liner on the biofilm formation of the microbial species. Methods. Field Emission Scanning Electron Microscopy (FESEM) images from NPs were recorded. Antifungal susceptibility testing of CuO NPs against five standard strains of Candida albicans (CBS 10261, 1905, 1912, 1949, 2730), Streptococcus mutans (ATCC35668), Streptococcus sobrinus (ATCC27607), and Streptococcus salivarius (ATCC9222) was performed by the broth microdilution method with the Clinical and Laboratory Standards Institute reference method. The biofilm inhibition percentages of CuO NPs on the soft denture liners were determined by XTT assay. Results. The characterization of CuO NPs by scanning electron microscope (SEM) analyses confirmed the synthesis of NPs with appropriate structure and size with a mean diameter of 18.3 ± 9.1 nm. The CuO NPs successfully inhibited the growth of the tested standard strains of C. albicans and Streptococcus spp. at concentrations ranging from 64 to 128 µg mL−1. Indeed, incorporation of CuO NPs at a concentration of 500 µg mL−1 into the soft denture liners exhibited a significant activity (75%) in inhibition of C. albicans. biofilm formation in a dose-dependent manner. The biofilm formation of C. albicans in the presence of CuO NPs was lower than Streptococcus spp. in comparison with the control group ( p < 0.05 ). Conclusion. Incorporation of CuO NPs significantly decreased the colonization and plaque formation of the oral pathogens, especially C. albicans accumulation. These NPs may be useful as a promising agent for the antimicrobial management of soft denture liner materials.
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Thakur, S. N., B. Khanal, R. Chaulagain, P. Shrestha, A. Maharjan, and H. Singh. "Knowledge, Attitude and Practices of Dental Adhesives use among Dental Practitioners of Chitwan." Journal of Nepalese Prosthodontic Society 3, no. 1 (June 30, 2020): 1–8. http://dx.doi.org/10.3126/jnprossoc.v3i1.34750.
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Introduction: Denture adhesive (DA) is defined as a material used to adhere a denture to the oral mucosa. It plays an important role in the retention and the functional comfort among denture wearers. There are conflicting views in dentistry regarding the use of denture adhesives in clinical practice. Therefore, the main purpose of the study is to reveal the knowledge, attitude and practices regarding denture adhesives among the dental practitioners of Chitwan district, Nepal.
Materials and Methods: A 20 item questionnaire was distributed among the registered dental practitioners of Chitwan districts using online google forms and the printed questionnaires were distributed personally to the practitioners who were accessible. Data were entered into Microsoft 2007 excel sheet and descriptive statistical analysis was done using SPSS version 20.
Results: The results showed that 69.1% of General dental practitioners and 50% of other specialists had average knowledge while all the prosthodontics had good knowledge regarding denture adhesives. About 96.80% of General dental practitioners, 60% of other specialists frequently use denture adhesive in their practice. Only 20.2% of general dental practitioners and 20% of other specialists knew the adverse effects of zinc-containing denture adhesives. Most of the dental practitioners (93%) used powder form of denture adhesives.
Conclusion: Most of the dental practitioners of Chitwan had fair knowledge, attitude and practice regarding denture adhesives.
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Chandu, GS, Dayanand Ashok Huddar, MN Hombesh, B. Sandhyarani, and Girish Shankar Nanjannawar. "Effect of Denture Cleanser on Weight, Surface Roughness and Tensile Bond Strength of Two Resilient Denture Liners." Journal of Contemporary Dental Practice 13, no. 5 (2012): 607–11. http://dx.doi.org/10.5005/jp-journals-10024-1195.
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ABSTRACT Aim Evaluating effects of a denture cleanser on weight, surface roughness and tensile bond strength on two resilient lining materials. Materials and methods Specimens of heat cure acrylic resin were prepared to verify weight change, surface roughness and tensile bond strength. Specimens were divided into four groups: Relined with resilient liner Visco-gel, soft liner immersed in Clinsodent denture cleanser and water and evaluated immediately, 24 hours, 7 and 15 days. Weight changes, roughness and tensile bond strength were determined and data submitted to statistical analysis. Results Visco-gel specimens immersed in water (group 1) have shown significant increased surface roughness than those immersed in Clinsodent (group 3) during 24 hours, 7 and 15 days. The soft liner specimens immersed in water (group 2) have shown increased surface roughness than those immersed in Clinsodent (group 4) during 24 hours and 7 days. Visco-gel specimens immersed in water have shown significant increased tensile bond strength during 7 and 15 days than those immersed in Clinsodent. The soft liner specimens immersed in water have shown increased tensile bond strength than those immersed in Clinsodent during immediately, 24 hours and 7 days. Conclusion Within limitations of this study, specimens immersed in Clinsodent demonstrated increased weight changes compared with water. Specimens immersed in water demonstrated lesser surface roughness and tensile bond strength compared with specimens immersed in Clinsodent. Clinical significance Resilient denture liners and denture cleansers are most commonly used materials in prosthodontics. Caution should be taken while selecting the materials which cause the detrimental changes on properties of the materials. How to cite this article Huddar DA, Hombesh MN, Sandhyarani B, Chandu GS, Nanjannawar GS, Shetty R. Effect of Denture Cleanser on Weight, Surface Roughness and Tensile Bond Strength of Two Resilient Denture Liners. J Contemp Dent Pract 2012;13(5):607-611.
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Lacoste-Ferré, M. H., Ph Demont, J. Dandurand, E. Dantras, D. Duran, and C. Lacabanne. "Dynamic mechanical properties of oral mucosa: Comparison with polymeric soft denture liners." Journal of the Mechanical Behavior of Biomedical Materials 4, no. 3 (April 2011): 269–74. http://dx.doi.org/10.1016/j.jmbbm.2010.10.005.
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Mancuso, Daniela Nardi, Marcelo Coelho Goiato, Bruna Carolina Rossatti Zuccolotti, Amália Moreno, and Daniela Micheline dos Santos. "Evaluation of Hardness and Colour Change of Soft Liners after Accelerated Ageing." Primary Dental Care os16, no. 3 (July 2009): 127–30. http://dx.doi.org/10.1308/135576109788634232.
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Introduction Soft liners have been developed to offer comfort to denture wearers. However, this comfort is compromised when there is a change in the properties of the material, causing colour change, solubility, absorption and hardening. These characteristics can compromise the longevity of soft liners. Aim The aim of this in vitro study was to investigate the effect of ageing on both the hardness and colour change of two soft liners following accelerated ageing. Methods Two denture liners, one resin based (Trusoft, Bosworth, Illinois, USA) and one silicone based (Ufi Gel P, Voco GMBH, Cuxhaven, Germany), were tested in this study for both hardness (using the Shore A scale) and colour change (using the CIE L*a*b* colour scale), initially and after 1008 hours (6 weeks) of accelerated ageing. Statistical analysis was performed using the unpaired t-test with the Welch correction. Results These indicated that both materials increased in hardness and underwent colour change after accelerated ageing. The initial hardness of Trusoft was far lower than that of Ufi Gel P (18.2 Shore A units vs 34.8 Shore A units). However, for Trusoft the changes for both hardness (from 18.2 to 52.1 Shore A units) and colour change (16.85 on the CIE L*a*b* colour scale) were greater than those for Ufi Gel P, for which hardness changed from 34.8 to 36.5 Shore A units and the colour change was 5.19 on the CIE L*a*b* colour scale. Conclusions Ufi Gel P underwent less hardness and colour change after accelerated ageing than Trusoft. On the other hand, the use of Trusoft may be preferable in cases where initial softness is a major consideration, such as when relining an immediate denture after implant surgery.
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Krishnappan, Prasanna Laxmi, Ragavendra Jaiesh, and TN Swaminathan. "Comparative Evaluation of Heat-Polymerized and Auto-Polymerized Soft Liners with Regard to Transverse Bond Strength, Peel Bond Strength and Water Sorption: An in vitro Study." International Journal of Prosthodontics and Restorative Dentistry 4, no. 3 (2014): 61–67. http://dx.doi.org/10.5005/jp-journals-10019-1109.
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ABSTRACT Purpose This is an in vitro study for comparative evaluation of transverse bond strength, peel bond strength and water sorption properties between heat polymerized and auto-polymerized resins. Materials and methods Two denture soft liners (Molloplast-B, Coe-Soft) were investigated. A total number of 60 specimens were used. Twenty specimens were used for evaluation of each physical property of soft liner. For transverse bond strength, ten specimens (64 ⨯ 2.5 ⨯ 10 mm) of each liner were made by processing the denture liners with heat cure polymethyl methacrylate (Meliodent). All specimens for transverse bond strength were conducted on samples immersed in distilled water at 37°C for 50 hours by using three-point transverse flexural tests in a Lloyd's Universal Testing Machine and transverse bond strength was calculated based on the maximum load, span length, breadth and thickness. Another set of ten specimens of (75 ⨯ 25 ⨯ 3 mm) of each denture liner were bonded over 25 mm of heat cure PMMA and separated over the remaining 50 mm of acrylic plate to estimate the peel bond strength. The peel bond strength were conducted on specimens which were dried at room temperature for 48 hours and tested at 21 1 ± C in a Lloyd's testing machine that was linked to an IBM Compatible Computer. The specimens were deformed with a cross head speed of 5 mm/minute according to ASTMD-903 and peel bond strength was calculated when peel angle was 180°. For water sorption tests, ten disc shaped samples of each liner of 50 mm in diameter and 0.5 mm in thickness were fabricated. After polymerization of the liners, the samples were then stored in distilled water at 37°C for 7 days. After one week, excess moisture was removed and each sample was weighed using electronic weighing machine. Results The transverse bond strength of Molloplast-B and Coe-Soft were almost similar and did not show any significant difference in their values. But, there is a significant decrease in the peel bond strength and water sorption property of Molloplast-B and Coe-Soft. Conclusion The reason for transverse bond strength results being similar for both the liners is because they were polymerized chemically with the denture base resins and this chemical affinity could have made its bond strength almost equal. Since, there is a decrease in the peel bond strength of Molloplast-B, the chances of stripping of the liner at the flanges of the denture is minimal. The decrease in water sorption of Molloplast-B can be expected to retain the bond with the denture and sustain the resilience property of the material for a longer time. How to cite this article Krishnappan PL, Jaiesh R, Swa- minathan TN. Comparative Evaluation of Heat-Polymerized and Auto-Polymerized Soft Liners with Regard to Transverse Bond Strength, Peel Bond Strength and Water Sorption: An in vitro Study. Int J Prosthodont Restor Dent 2014;4(3):61-67.
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Davidovic, Lado, Mirjana Cuk, Marija Zivkovic-Sandic, Djurica Grga, and Slavoljub Zivkovic. "The influence of liners on the pulp inflammation." Srpski arhiv za celokupno lekarstvo 143, no. 5-6 (2015): 261–66. http://dx.doi.org/10.2298/sarh1506261d.
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Introduction. The study included application of liners and dental composites in to cavities of six experimental animals - rabbits (Oryctolagus cuniculus). Objective. The aim of the study was to investigate rabbit dental pulp response to different liners. Methods. Cavity preparation for class V were made on the maxillary central incisors and one lower incisor, while the second lower incisor served as a control tooth. These teeth were restored with the use of one of the following liners - Calcimol LC, ANA Liner and Fuji II LC Improved, and Ceram-X mono dental composite. After an observation period of five days animals were sacrificed and prepared for histological analysis. The existence and degree of the pulp inflammation was determined by using a light microscope. Results. Results showed that the used liners do not cause distortion of the structure and continuity of the odontoblastic layer. Inflammation was not registered in the control group, while in each group of tested materials one tooth with mild signs of hyperemia was registered. Results showed that all three tested liners demonstrated favorable effects on the pulp of the tooth and did not lead to inflammatory reactions. Conclusion. Histological analysis of the dental pulp of experimental animals suggests that the liners used in this study do not compromise the integrity of the odontoblastic layer, if it is applied over a thin layer of dentin. In each group of tested materials one tooth with mild signs of hyperemia and vasodilation was registered.
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Ergun, Gulfem, and Isil Cekic Nagas. "Color Stability of Silicone or Acrylic Denture Liners: An in Vitro Investigation." European Journal of Dentistry 01, no. 03 (July 2007): 144–51. http://dx.doi.org/10.1055/s-0039-1698330.
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ABSTRACTObjectives: The aim of this study was to compare the color stability of three acrylic based hard liners (Ufi gel hard, Dura-Liner II, Tokuso Rebase) and two silicone based soft liners (Ufi gel permanent, Molloplast B) by using the colorimeter.Methods: Sixty disc-shaped samples, with uniform size of 10 mm diameter and 2 mm in thickness were fabricated for each material. Thirty samples were made as control group in distilled water and the remaining thirty samples were weathered in accelerated aging chamber. Color measurements were made before and after distilled water and aging. Data were statistically analyzed using nonparametric Kruskal-Wallis and Mann-Whitney U tests.Results: Data showed that there are significant differences among materials in both after distilled water and aging treatments (P>.001). These results indicated that the most discolored liner material was Dura Liner II after aging (ΔE*=16.30) and the least discolored material was Ufi gel permanent after distilled water (ΔE*=0.41).Conclusions: Based on the results of this study, silicone based liner materials are considered to be more color stable than acrylic based liner materials. (Eur J Dent 2007;1:144-151)
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Qanber, Lubna M., and Thekra I. Hamad. "Effect of plasma treatment on the bond of soft denture liner to conventional and high impact acrylic denture materials." Journal of Baghdad College of Dentistry 33, no. 3 (September 15, 2021): 9–17. http://dx.doi.org/10.26477/jbcd.v33i3.2948.
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Background: The main drawback of soft lining materials was that they debonded from the denture base after a certain period of usage. Therefore, the purpose of this research was to determine the impact of oxygen and argon plasma treatment on the shear bonding strength of soft liners to two different kinds of denture base materials: conventional acrylic resin and high impact acrylic resin. Materials and Methods: Heat cure conventional and high impact acrylic blocks (40 for each group) were prepared. A soft liner connected the final test specimen of two blocks of each acrylic material. Shear bond strength (SBS) was assessed using universal testing machine. Additional blocks were also prepared for analyzing Vickers microhardness, contact angle, FTIR and AFM. The results were statistically analyzed using paired-sample T-test and independent-samples T-test (α=0.05). Results: The results showed a highly significant increase in SBS following plasma treatment with the highest mean value observed in plasma treated high impact acrylic specimen. Along with a significant rise in wettability, while microhardness was preserved. Conclusion: In conclusion, oxygen and argon plasma treatment was significantly effective in enhancing the SBS between soft liner and acrylic materials.
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Cervino, Gabriele, Marco Cicciù, Alan Scott Herford, Antonino Germanà, and Luca Fiorillo. "Biological and Chemo-Physical Features of Denture Resins." Materials 13, no. 15 (July 28, 2020): 3350. http://dx.doi.org/10.3390/ma13153350.
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In the dental field, the study of materials has always been the basis of the clinical practice. Over the years, with the evolution of materials, it has been possible to produce safe and predictable prosthetic devices, with ever better aesthetic features, biocompatibility and patient satisfaction. This review briefly analyzes the features of dental resin materials to underline the biological, microbiological and chemo-physical characteristics. The main aim of prosthodontics is to rehabilitate patients and therefore improve their quality of life. Dental resins are the main materials used for the production of dentures. Once solidified, these polymers have different mechanical or surface characteristics. The results of the literature on these characteristics were analyzed and some new brand dental resins, known as modern resin, were subsequently evaluated. The new materials are undoubtedly a step forward in the creation of dental prostheses, and also in all subsequent maintenance phases. This review shows how changing the chemical structure of the resins could have microbiological influences on the growth and management of the biofilm, and also physical influences in terms of its mechanical characteristics. The development of new materials is a constant goal in dentistry in order to obtain increasingly predictable rehabilitations.
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Andreescu, Claudia Florina, Doina Lucia Ghergic, Oana Botoaca, Violeta Hancu, Andreea Mariana Banateanu, and Dan Nicolae Patroi. "Evaluation of Different Materials Used for Fabrication of Complete Digital Denture." Materiale Plastice 55, no. 1 (March 30, 2018): 124–28. http://dx.doi.org/10.37358/mp.18.1.4977.
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Utilization of computer-aided design/computer-aided manufacturing (CAD/CAM) rapidly increases in dental medicine. Making of computer-engineered complete denture is based on scanning of patient data, designing of prosthesis and milling or rapid prototyping. This is digital denture, term that includes innovative devices, software programmes and corresponding materials. Industrially polymerized cross-linked polymethyl methacrylate (PMMA) is the material used for fabrication of digital denture. The aim of this study is to analyze the different cross-linked PMMA used for fabrication of CAD/CAM complete denture.
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Badaró, Maurício Malheiros, Vanessa Maria Fagundes Leite-Fernandes, Luciano Trevisan Martin, Viviane de Cássia Oliveira, Evandro Watanabe, Helena de Freitas de Oliveira Paranhos, and Cláudia Helena Silva-Lovato. "Antibiofilm Activity of an Experimental Ricinus Communis Dentifrice on Soft Denture Liners." Brazilian Dental Journal 30, no. 3 (June 2019): 252–58. http://dx.doi.org/10.1590/0103-6440201902326.
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Abstract The disadvantage of liners materials is the difficulty of biofilm control. It was compared an experimental dentifrice contained Ricinus communis, with commercials dentifrices as antibiofilm activity against microorganisms on denture liner. Six hundred specimens were distributed in 5 groups (n=18/ microorganism): water; experimental dentifrice; specific dentifrice for denture and two conventional dentifrices against C. albicans; C. glabrata; S. mutans; S. aureus; E. coli. Each group had a negative (n=5; without contamination) and positive control (n=15/ microorganism; without cleaning). The antibiofilm activity was evaluated by the method of biofilm formation in triplicate. The specimens were contaminated in a standard way and incubated. After that, manual brushing was performed (60 s), washed with PBS, immersed in liquid culture medium for resuspension and sowing in solid medium. The results (mean of triplicates) were expressed in CFU/mL. The data was submitted to Shapiro-Wilk, ANOVA and Tukey test (p<0.05). The specific dentifrice (1.27±1.20) was the most effective against S. mutans, followed by conventional (Trihydral, 3.13±0.88; Colgate, 2.16±2.02) and experimental (3.81±1.37) dentifrices, which were similar to each other (p=0.008). All of them were different from water (4.79±1.42). The specific (0.21±0.21) and experimental (0.36±0.25) dentifrices were similar against S. aureus, with a higher mean of CFU when compared to conventional (Colgate, 0.06±0.13), which was more efficient (p=0.000). For C. albicans, C. glabrata and E. coli, all dentifrices were similar to water (p=0.186). It was concluded, that the experimental dentifrice was effective against S. aureus and had not efficacy against Candida spp.; S. mutans; E. coli, as occurred with the commercials dentifrices.
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Williams, David R., David Chacko, Daryll C. Jagger, and Alan Harrison. "Reline Materials—Handle with Care?" Primary Dental Care os8, no. 4 (October 2001): 151–55. http://dx.doi.org/10.1308/135576101322462219.
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Introduction The fit of the denture base to the alveolar ridge progressively declines with alveolar ridge resorption. Once a denture becomes ill-fitting there are two main treatment options: to construct a new denture or to restore the fit of the existing denture. A denture may be relined as a laboratory procedure or at the chairside in the dental clinic. The chairside reline technique involves the direct application of auto-polymerising acrylic resin materials to the prepared denture base and the material is allowed to polymerise in the patient's mouth. The reline materials are generally supplied as a powder and a liquid. Clinicians and laboratory dental staff do not always follow manufacturers’ recommended guidelines and the tendency can be simply to add varying quantities of powder and liquid until the desired consistency is achieved. This method however may have deleterious effects on the properties of the resultant material. Materials and method The aim of the study was to investigate the effect of varying the powder/liquid ratio on some properties of three auto-polymerising acrylic resin reline materials. The properties investigated were the flow characteristics in terms of the manipulation and setting time and the hardness. Four powder and liquid ratios were chosen. Results and conclusions For all the materials studied, a clinically useful lengthening of the manipulation time can be achieved by increasing the amount of liquid added to the powder. However, this is perhaps offset by the fact that it is associated with a corresponding increase in the setting time and resultant increase in clinical chair-side time. There were significant differences in surface hardness when the powder/liquid ratio was altered.
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Ramakrishnaiah, Ravikumar, Abdul Aziz Abdullah al Khureif, Anilkumar Gujjari, and MR Dhakshayini. "A Comparative Study to Evaluate The Softness of Heat Processed and Auto Polymerized Denture Relining Materials When Stored in Hard and Soft Water-An Invitro Study." Journal of Oral Health and Community Dentistry 6, no. 2 (2012): 74–78. http://dx.doi.org/10.5005/johcd-6-2-74.
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ABSTRACT Aim To evaluate the effect of hard and soft water on softness of three commercially available soft liners. Material and Methods 8 specimens of 3mm height and 41mm diameter were fabricated from each soft liner on acrylic resin base of 3mm height and 44mm diameter. The specimens were stored in artificial saliva (Wet mouth, ICPA product) for14 hours in a day, at 37°C in an incubator and the rest of the time 4 specimens from each group were stored in hard water and 4 in soft water. Softness of each specimen was recorded using Shore-A durometer at the end of 1st, 7th, 15th, and 30th day. Results When compared between hard and soft water, the autopolymerized acrylic and autopolymerized silicone soft liners had significant reduction in softness on 7th day in hard water. The autopolymerized acrylic soft liner had least softness in both hard and soft water. The heat polymerized acrylic soft-liner showed maximum softness in both hard and soft Water. Conclusion Heat polymerized acrylic soft liner was proven to be softer than the other two materials followed by autopolymerized silicone and autopolymerized acrylic soft liners.
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Chaves, Carolina de Andrade Lima, Carlos Alberto de Souza Costa, Carlos Eduardo Vergani, Pedro Paulo Chaves de Souza, and Ana Lucia Machado. "Effects of Soft Denture Liners on L929 Fibroblasts, HaCaT Keratinocytes, and RAW 264.7 Macrophages." BioMed Research International 2014 (2014): 1–14. http://dx.doi.org/10.1155/2014/840613.
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The effects of six soft liners (Ufi Gel P (UG), Sofreliner S (SR), Durabase Soft (D), Trusoft (T), Coe Comfort (CC), and Softone (ST)) on L929, HaCat, and RAW 264.7 cells were investigated. Eluates (24 and 48 h) from the materials were applied on the cells and the viability, type of cell death, and morphology were evaluated. Cells were also seeded on the specimens’ surfaces (direct contact) and incubated (24 or 48 h), and viability was analyzed. Controls were cells in culture medium without eluates or specimens. For cell viability, no significant differences were found among materials or between extraction periods, and the liners were noncytotoxic or slightly cytotoxic. Morphology of RAW 264.7 cells was altered by the 24 h eluates from CC and D and the 48 h eluates from SR, CC, and D. The 24 and 48 h eluates from all materials (except T) increased the percentages of L929 necrotic cells. For direct contact tests, the lowest cytotoxicity was observed for UG and SR. Although eluates did not reduce viability, morphology alterations and increase in necrosis were seen. Moreover, in the direct contact, effects on viability were more pronounced, particularly for D, T, CC and ST. Thus, the use of UG and SR might reduce the risk of adverse effects.
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Shrestha, B., PK Parajuli, B. B. Basnet, G. Adhikari, DB Pun, D. Rokaya, and A. Bhandari. "Knowledge and Attitude of Nepalese Dental Interns towards Adhesives for Removal Dentures." Journal of BP Koirala Institute of Health Sciences 2, no. 2 (December 31, 2019): 40–45. http://dx.doi.org/10.3126/jbpkihs.v2i2.27857.
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Background: Denture adhesives play an important role in the retention of removal dentures. This research aimed to study the knowledge and attitude (K&A) of Nepalese dental interns in various Universities/ dental colleges towards adhesives for removal denture (ARDs).
Materials and Methods: A survey was conducted among the dental interns of various colleges in Nepal. Pearson’s Chi-square test was carried out to compare the various variables among the Universities/ dental colleges. Rating scale was used for testing the K&A towards denture adhesives.
Results: It was found that 86.5% of the dental interns had adequate K&A on ARDs, 87.8% responded that ARD is beneficial for dentures and 95.5% agreed that dentists should regularly inform regarding ARDs to all denture patients.
Conclusion: Most of the Nepalese dental interns of various Universities/ dental colleges possessed acceptable K&A on ARDs.
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Tugut, Faik, Mehmet Emre Coskun, Derya Ozdemir Dogan, Omer Kirmali, and Hakan Akin. "Tensile Bond Strength between Soft Liners and Two Chemically Different Denture Base Materials: Effect of Thermocycling." Journal of Prosthodontics 25, no. 4 (September 16, 2015): 319–23. http://dx.doi.org/10.1111/jopr.12296.
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Onuma, Hiraku, Masanao Inokoshi, Daisuke Hirayama, Minoru Inoue, and Shunsuke Minakuchi. "Stress distribution analysis of oral mucosa under soft denture liners using smoothed particle hydrodynamics method." Journal of the Mechanical Behavior of Biomedical Materials 117 (May 2021): 104390. http://dx.doi.org/10.1016/j.jmbbm.2021.104390.
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Jadczak, Kamila, Rafał Białek, and Marek Kuchta. "Impact of Prosthetic Materials Manufacturing Process on the Reliability of Dentures." Journal of KONBiN 45, no. 1 (March 1, 2018): 183–99. http://dx.doi.org/10.2478/jok-2018-0010.
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Abstract The paper presents a method of testing dental alloys used to produce frame dentures. The material constants stated by the manufacturers of dental alloys were verified. The impact of presented discrepancies on the durability and reliability of a frame denture was discussed.
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Al Jmoor, Cheman Abdulrahman. "Bacterial Contamination of Acrylic Resin Complete Denture : In Vitro Study." Journal of Baghdad College of Dentistry 30, no. 2 (June 15, 2018): 1–4. http://dx.doi.org/10.26477/jbcd.v30i2.2455.
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Background: Cross contamination of dental appliances in the dental clinics and laboratories may potentially be a health hazard to the dental team and the patient. This study aimed to evaluate bacterial contamination of acrylic complete denture as received from dental laboratory before delivery to the patient, and then to evaluate the effectiveness of disinfection with 2% chlorhexidine and Kin denture cleaner tablet. Materials and methods: 45 newly made upper complete dentures undergone biaacterial examination for contamination before delivered to the patient. Samples were examined in two stages, first after finishing and polishing; when collected from the laboratory and before inserting to the patient mouth, second; after the samples were immersed in 2 different disinfectant materials, 2% chlorhexidine mouth wash and Kin denture cleaner tablet. After initial stage, the dentures were divided into 3 groups. Group 1 immersed in Kin denture cleaner tablet for 10 minutes, group 2 immersed in 2% chlorhexidine mouth wash for 10 minutes and group 3 immersed for 20 minutes in 2% chlorhexidine. Data were analyzed with a computer-run statistical program (IBM SPSS Version 23). Results: High score of bacterial contamination was found initially in the sample collected from dental laboratory. Significant reduction in the colonies number was noticed after immersing the dentures in 2% Chlorhexidine and Kin denture cleaner tablets for10 minutes. There was nearly no contamination found with samples immersed in 2% chlorhexidine for 20 minutes. Conclusion: Dental laboratory is a main source of microbial contamination. Immersion of the dental prosthesis in disinfectant materials is essential before inserting into the patient mouth. 2%chlorhexidine mouth wash was more effective as disinfection material as compared to Kin denture cleaner tablet.
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Prashanth, MB, Rahul Shrivastava, Kamal Shigli, BN Kumaraswamy, and TD Nethravathi. "Assessment of Dental Anxiety and its Correlation with Denture Satisfaction in Edentulous Patients." Journal of Contemporary Dental Practice 13, no. 3 (2012): 257–60. http://dx.doi.org/10.5005/jp-journals-10024-1133.
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ABSTRACT Objective The objectives of this study were to measure the level of dental anxiety and its correlation with dental history, denture satisfaction and other variables. Materials and methods A cross-sectional study was conducted on 150 completely edentulous patients reporting to the Department of Prosthodontics, KLES's Institute of Dental Sciences, Belgaum, over a period of 17 months (August 2005 to March 2007). The anxiety level of the patients was assessed with the help of a questionnaire, after obtaining an informed consent. Reliability of the dental anxiety scale was assessed by means of coefficient alpha. Results The results of this study concluded that dental anxiety scale for edentulous patients was a reliable scale for measuring dental anxiety. The anxiety score was higher for female than male patients. A significant correlation was found between denture satisfaction score and anxiety. Discussion Anxiety plays a major role in denture satisfaction. The variables included: Previous denture experience, occupation, medical history, age, gender, dental anxiety scale, period of edentulousness, age of previous dentures, number of complete dentures, denture satisfaction score, and the score on the Hamilton anxiety scale Conclusion The study indicated that gender correlates significantly with dental anxiety. Patients with medical history were found to be more anxious than normal patients. Patients with higher anxiety values were less satisfied with the treatment. Lastly, subjects with higher general anxiety showed greater values on the dental anxiety scale. Clinical significance The assessment of dental anxiety will help the prosthodontist in the management of anxious patients and secondly to provide evidence-based research into this psychological construct which has been shown to predict dental avoidance. How to cite this article Shrivastava R, Srivastava R, Shigli K, Prashanth MB, Kumaraswamy BN, Nethravathi TD. Assessment of Dental Anxiety and its Correlation with Denture Satisfaction in Edentulous Patients. J Contemp Dent Pract 2012;13(3):257-260.
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Bhandari, Aruna Jawaharlal, and Akshay Jawaharlal Bhandari. "A Clinical Study of Improved Nitrile Butadiene Rubber Soft Lining Material and Acrylic Denture Base." International Journal of Prosthodontics and Restorative Dentistry 5, no. 4 (2015): 91–94. http://dx.doi.org/10.5005/jp-journals-10019-1137.
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ABSTRACT Relining of a complete denture essentially involves the recording of an impression within its support surface so as to correct the deficiency that has arisen as a result of tissues changes. Relining can be done simply, accurately and inexpensively by using lining material. In relining, a new thin layer of lining material is added to the existing denture base. Due to residual ridge resorption and irreversible changes in the tissues supporting, the prosthesis become loose and patient may complaint of frequent pain and ulceration. Relining can be done in such patients by using lining. A soft denture liner which is placed in a denture base that contacts tissues provides comfort. Resilient denture liners because of their viscoelastic properties act as shock absorber and reduce and distribute the stress on the denture bearing tissues. However, there is an increased probability of fungal growth on soft lining materials. Adherence of Candida to solid surface, such as denture resin or lining material has been thought to be the first step in successful colonization, subsequent plaque formation and development of pathogenesis. This study is done to find the adherence of Candida albicans to nitrile butadiene rubber (NBR) soft lining material and safe duration of its clinical usage. How to cite this article Bhandari AJ, Bhandari AJ. A Clinical Study of Improved Nitrile Butadiene Rubber Soft Lining Material and Acrylic Denture Base. Int J Prosthodont Restor Dent 2015;5(4):91-94.
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Yankova, Mariana, Todor Peev, Bozhidar Yordanov, Mariana Dimova-Gabrovska, and Desislava Dimitrova. "STUDY OF THE KNOWLEDGE AND USE OF RESILIENT DENTURE LINING MATERIALS IN CLINICAL PRACTICE." Journal of IMAB - Annual Proceeding (Scientific Papers) 27, no. 2 (April 2, 2021): 3668–75. http://dx.doi.org/10.5272/jimab.2021272.3668.
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Introduction: Since the beginning of the last century until today, resilient resins have been used for the lining of partial and complete dentures with the aim to achieve more uniform distribution of masticatory pressure and to reduce the trauma of mucous membranes. The aim of this study was to investigate the knowledge and use of resilient denture lining materials (RDLMs) in clinical practice. Material and methods: The study was conducted among dental practitioners and dental technicians in 2016. A direct survey method was used, with a questionnaire containing 11 questions. Results: Over half (53.4%, n = 133) of the respondents do not use RDLMs in their practice. In the cases of retentive prosthetic field or prosthetic field with advanced atrophy, the respondents focus mainly on the surgical preparation of the prosthetic field and recommend the use of RDLMsif there are exostosis-related pain symptoms (≈41%, n = 103) or painful neurogenic points (≈ 44%, n = 105). One-third of the respondents prefer the use of long-term RDLMs, and 73% prefer to apply the indirect lining technique. Conclusion: The various types of RDLMs and their characteristics are well-known by the dental practitioners and dental technicians but rarely used, due to a number of unresolved related issues, such as ungluing of the resilient material from the denture base, appearance of an unpleasant odor, change in the color or texture of the material, etc. In our study, dental practitioners and dental technicians use RDLMsfor complete denture lining mainly in clinical cases with presented pain symptoms.
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Ratwita, Dwiyanti Feriana, Okti Setyowati, and Endang Kusdarjanti. "TRAINING AND COUNSELING ON DISINFECTION DURING REPAIR OF ACRYLIC RESIN DENTURES AT DENTAL LABORATORIES IN SURABAYA AND JEMBER." Darmabakti Cendekia: Journal of Community Service and Engagements 1, no. 1 (June 25, 2019): 1. http://dx.doi.org/10.20473/dc.v1.i1.2019.1-7.
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Background: The dentist who handles a broken acrylic resin denture base case will send the denture to be repaired by a dental technician in the dental laboratory. The transfer of work is likely to pose a risk of cross-infection (for example AIDS, hepatitis, tuberculosis, pneumonia, and herpes. Purpose: To transfer science and technology based on community needs objectively to get a strong foundation in implementing health management for dental technicians. Methods: Training on how to use disinfection materials as well as participatory counseling using slides through LCD projectors, and using props along with interactive discussions and also mentoring when trainees take disinfection measures. Results: The implementation includes 3 activities, that is counseling, training and monitoring Counseling is carried out by providing knowledge about how to disinfect dentures, then training in how to do disinfection, the way is to train dental technicians to disinfect using chlorhexidine by spraying on the denture surface, then monitored. Conclusion: So far the dental laboratory has not carried out any disinfection at the time of denture repair. With counseling and training in this community partnership program, dental technicians know the importance of disinfection denture to prevent cross infection, so that it will then do it.
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Verma, Mahesh, Sneha Menghani, Jyoti Devi, Rekha Gupta, and Shubhra Gill. "A Novel Approach to Treat Traumatized Alveolar Ridges: Two Case Reports." Case Reports in Dentistry 2016 (2016): 1–6. http://dx.doi.org/10.1155/2016/9312412.
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Functional forces are transmitted to the basal seat mucosa through a hard denture base during mastication. Such hard base dentures are not comfortably tolerated in patients with fragile oral mucosa and will cause sore spots, masticatory pain, and further resorption of alveolar bone. Soft liners materials can be advocated successfully to manage such clinical situations. The soft liner material absorbs masticatory forces by means of the cushioning effect and distributes occlusal forces uniformly to prevent trauma to compromised residual ridges.
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Setyowati, Okti, and Endang Kusdarjanti. "ANALYSIS ON THE PATTERN OF USING THE SERVICE OF REMOVABLE PARTIAL DENTURE MAKING IN A DENTAL LABORATORY IN SURABAYA." Folia Medica Indonesiana 52, no. 4 (August 14, 2017): 270. http://dx.doi.org/10.20473/fmi.v52i4.5474.
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The making of removable denture is performed by a dental laboratory. To facilitate the identification, according to Kennedy classification, classes are divided onto groups, the Kennedy class I, II, III and IV. To suit with the needs of the dental laboratory tasks commonly done, priority are necessary for common cases and should to be taught to students of Dental Health Technology Diploma. In Surabaya, research of various cases of removable partial denture with the various Kennedy classifications has never been done before. This study was to analyze the pattern of service for the removable partial denture manufacture in dental laboratory at Surabaya (2011 – 2013). The research is an observatory analytic. The population is all dental laboratories located around the campus of the Faculty of Dentistry Airlangga University Surabaya. The sample was the whole population is willing to become respondents. Sampling by total sampling. The method of collecting data using secondary data from a dental laboratory in Surabaya from 2011 until 2013. The note is cases removable denture according to the classification of Kennedy that Kennedy Class I, II, III and IV. Also of note kinds of materials used to make the denture base that is heat cured acrylic resins, thermoplastic resins and metals coherent. The data is a compilation table charting the frequency until needed, then analyzed using cross tabulation. Mostly denture type is flexible type and the least is metal framework. Most cases by classification Kennedy is followed by class II class III and class II and more recently is the fourth. In conclusion, in 2011 and 2013 the manufacture of removable partial dentures according to the classification of Kennedy Class III is the most common in both the upper arch and lower jaw, followed by Class II, Class I and Class IV. In 2012 which is the highest grade III followed by class II, class IV and class I. The denture type most used is a flexible denture, followed acrylic denture and the last is the metal framework.
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Urechescu, Horatiu, Marius Pricop, Cristiana Pricop, Marius Mateas, Simon Natanael, and Sergiu Valentin Galatanu. "Thermoplastic Materials Used for Fabrication of Maxillary Obturator Prostheses Experimental compression and traction tests." Materiale Plastice 54, no. 3 (September 30, 2017): 477–80. http://dx.doi.org/10.37358/mp.17.3.4874.
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Maxillary obturator prostheses are dental devices used to close palatal defects created by surgical resection of different type of tumors, congenital malformation or trauma. The most popular material used for denture fabrication is the polymethyl methacrylate (PMMA). In recent years thermoplastic resins has attracted attention as a denture base material. This paper presents experimental compression and traction tests of VertexTMThermoSense from Vertex-Dental B.V. VertexTMThermoSense is a thermoplastic material based on a compounded mixture of Polyamide and pigments used in the fabrication of removable full and partial dental prostheses. Test results show that the average compressive yield strength of the samples is 60.18 MPa. The result of the tensile test showed an average of 49.4 MPa yield strength. VertexTMThermoSense has a very good average of the yield strain of 10%. The average of Young modulus is 1050 MPa.
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Wicks, Russell, Jegdish Babu, Franklin Garcia-Godoy, and Vinay Jain. "Comparison of Fungal Biofilm Formation on Three Contemporary Denture Base Materials." International Journal of Experimental Dental Science 4, no. 2 (2015): 104–8. http://dx.doi.org/10.5005/jp-journals-10029-1106.
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ABSTRACT Statement of problem: Modern polyamide ‘flexible’ denture base materials have increased in popularity for use in removable partial dentures in the last several years. The introduction of these newer products warrants investigation of their relative potential to develop fungal biofilms. Purpose The purpose of this study was to investigate the potential of three denture base materials to support fungal biofilm formation. Materials and methods Specimens of two ‘flexible’ nylon type materials and one traditional heat processed, methyl methacrylate resin material were studied (both polished and unpolished surfaces). The specimens were coated with saliva and evaluated for fungal (Candida albicans) biofilm formation. The fungal biofilm mass formed on denture substrates were evaluated by dry weight analysis and by determining the number of viable fungal cells in the biofilm by MTT viability assay. Alteration in fungal metabolic function following the treatment of the biofilm C. albicans with nystatin and fluconazole was determined by XTT assay. Results In general, the unpolished surfaces of the denture disks favored the fungal biofilm, the most being on polyamide specimen, Valplast. Significantly, less biofilm was formed on Duraflex and Lucitone surfaces. Biofim on C. albicans was also found to be resistant to antifungal agents. As compared to freshly incubated (grown) planktonic cells, biofilm fungal cells required significantly higher concentrations of nystatin and fluconazole in order to obtain 50% reduction in metabolic activity. Conclusion This study demonstrated the differences in denture materials to support fungal biofilm formation, and also difference between polished and unpolished denture material surfaces. The results demonstrated that one of the polyamide materials (duraflex) had lesser potential to biofilm formation than the others. Clinical significance Unfavorable tissue responses can ensue from the presence of fungal biofilms on dental prosthetics. Resistance to biofilm formation is a factor for dental materials in their selection and usage. This study helps to quantify, evaluate and compare biofilm formation on polished and unpolished surfaces of three commonly used denture base materials. The results of this study helped to identify materials, which may, therefore, be better indicated in clinical applications. Evaluations for the newer denture base materials, specific to these testing methods, appear to be novel in the scientific literature. How to cite this article Jain V, Babu J, Ahuja S, Wicks R, Garcia-Godoy F. Comparison of Fungal Biofilm Formation on Three Contemporary Denture Base Materials. Int J Experiment Dent Sci 2015;4(2):104-108.
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Kawala, Maciej, Joanna Smardz, Lukasz Adamczyk, Natalia Grychowska, and Mieszko Wieckiewicz. "Selected Applications for Current Polymers in Prosthetic Dentistry - State of the Art." Current Medicinal Chemistry 25, no. 42 (February 6, 2019): 6002–12. http://dx.doi.org/10.2174/0929867325666180510142937.
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Background: Polymers have wide applications in medicine, including dentistry, i.e. in prosthetic dentistry. Aim: The following paper is aimed at demonstrating the applications of selected modern polymers in prosthetic dentistry based on the reported literature. Material and Methods: The study was conducted using the PubMed, SCOPUS and CINAHL databases in relation to documents published during 1999–2017. The following keywords were used: polymers with prosthetic dentistry, impression materials, denture base materials, bite registration materials, denture soft liners, occlusal splint materials and 3D printing. Original papers and reviews which were significant from the modern clinical viewpoint and practical validity in relation to the possibility of using polymeric materials in prosthetic dentistry were presented. Results: Denture base materials were the most commonly modified polymers. Modifications mainly concerned antimicrobial properties and reinforcement of the material structure by introducing additional fibers. Antimicrobial modifications were also common in case of relining materials. Conclusion: Polymeric materials have widely been used in prosthetic dentistry. Modifications of their composition allow achieving new, beneficial properties that affect the quality of patients’ life. Progress in science allows for a more methodologically-advanced research on the synthesis of new polymeric materials and incorporation of new substances into already known polymeric materials, that will require systematization and appropriate classification.
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Saxena, Sudhanshu, Snigdha Gowd, Thatapudi Shankar, Vinay Suresan, Sneha Mantri, Prateek Mishra, and Pragya Panday. "Denture Hygiene Knowledge and Practices among Complete Denture Wearers attending a Postgraduate Dental Institute." Journal of Contemporary Dental Practice 18, no. 8 (2017): 714–21. http://dx.doi.org/10.5005/jp-journals-10024-2113.
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ABSTRACT Aims The aim of this study was to assess the denture hygiene knowledge and practices among patients using complete dentures attending a postgraduate dental hospital in Jabalpur city. The objective of this study was to assess the relationship between hygiene knowledge and practices to the denture wearer's gender, education, and income. Materials and methods A descriptive, cross-sectional survey was conducted using a self-administered questionnaire involving the complete denture patients attending the Department of Prosthodontics. The study subjects were randomly selected by recruiting old dentures wearers visiting the Department of Prosthodontics for a recall visit or for new dentures on the odd dates of the month. All subjects signed an informed consent before filling the questionnaire. The institutional review committee approved the study. Descriptive statistics included computation of frequencies and percentages. Nonparametric test, namely, chi-square test, was used for further data analysis; p-value <0.05 was considered statistically significant. Results A total of 530 individuals were approached for participation in our survey, 30 (5.66%) subjects declined to participate. The results showed that 195 (39%) subjects were wearing the same dentures for more than 5 years. In this study, 51 (10.2%) subjects reported never having been advised by their dentists as to how to clean their dentures. Among all the subjects interviewed, 264 (52.8%) reported to clean the oral tissues daily. This study disclosed that 66 (13.2%) of the subjects usually slept with their dentures. Maximum subjects in illiterate group had experienced bad breath sometimes when compared with subjects in postgraduate group (χ2 = 47.452, p < 0.001). There was a significant difference for method of denture cleaning according to gender (χ2 = 101.076, p < 0.001). Conclusion The majority of the denture wearers have limited knowledge of denture cleansing and oral hygiene practices. Hygiene habits and practices may not always present a positive correlation with the gender, educational level, and income of the subjects. Clinical significance Periodic recall for evaluation of denture and mucosal surfaces along with reinforcement of denture hygiene instructions will go a long way in helping the patients reap maximum benefits out of their prostheses. How to cite this article Shankar T, Gowd S, Suresan V, Mantri S, Saxena S, Mishra P, Panday P. Denture Hygiene Knowledge and Practices among Complete Denture Wearers attending a Postgraduate Dental Institute. J Contemp Dent Pract 2017;18(8):714-721.
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Gonzalez, Jorge. "The Evolution of Dental Materials for Hybrid Prosthesis." Open Dentistry Journal 8, no. 1 (May 16, 2014): 85–94. http://dx.doi.org/10.2174/1874210601408010085.
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Since the immemorial, the replacement of missing teeth has been a medical and cosmetic necessity for human kind. Nowadays, middle-aged population groups have experienced improved oral health, as compared to previous generations, and the percentage of edentulous adults can be expected to further decline. However, with the continued increase in the number of older adult population, it is anticipated that the need for some form of full-mouth restoration might increase from 53.8 million in 1991 to 61 million in 2020 [1]. Denture prosthetics has undergone many development stages since the first dentures were fabricated. The introduction of computer-aided design/computer aided manufacturing (CAD/CAM) has resulted in a more accurate manufacturing of prosthetic frameworks, greater accuracy of dental restorations, and in particular, implant supported prosthesis.
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Brown, David. "A Materials Scientist's Glimpse into the New Millennium." Primary Dental Care os7, no. 1 (January 2000): 25–28. http://dx.doi.org/10.1308/135576100322748493.
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Questions about the materials which are in current use are posed and answered in this review, which speculates about the sort of dental materials we will be using, or would like to use in the next century. Consideration is given to the merits and failings of dental amalgam, composites and glass-ionomer cements prior to laying down the requirements of the ultimate direct filling material. The case for the continued use of dental alloys for large restorations is discussed, and new ways of forming these are described. The use of many cunning techniques to improve the resistance of dental ceramics to catastrophic failure is reported, and a general improvement in both the denture bases and orthodontic appliances of the future is predicted.
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Ratwita, Dwiyanti Feriana. "Counseling About Disinfection During Repair of Acrylic Resin Dentures at Dental Laboratories in Malang and Kediri." Darmabakti Cendekia: Journal of Community Service and Engagements 2, no. 2 (April 28, 2021): 51. http://dx.doi.org/10.20473/dc.v2.i2.2020.51-57.
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Background: Sometimes the artificial teeth break or fracture, so then the patient asks the dentist to repair it. The dentist will then send the denture to be repaired by a dental technician in the dental laboratory. The transfer of work is likely to pose a risk of cross infection (for example: AIDS, hepatitis, tuberculosis, pneumonia and herpes. Objective: To transfer knowledge and technology of dentistry based on community needs objectively to obtain a strong foundation in carrying out health management of dental technicians . Implementation Method: Providing counseling to dental technicians on how to use disinfection materials and using props accompanied by interactive discussion Results: Implementation this programs is conducted at 2 locations in the city of Malang and Kediri Counseling is done by providing knowledge about how to disinfect dentures using chlorhexidine material by spraying it on the entire surface of the denture. Conclusion: The counseling activity which was held for a day received good reception from the participants.The dedication report was prepared to be a reference material in raising awareness of t dental technicians who work in dental laboratories to avoid cross-infection when doing denture repair
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Huang, Hua Li, Dan Feng, Hai Huan Gong, Ai Yang Song, and Song Zhu. "Color Stability of Heat-Cured Denture Base Resins." Advanced Materials Research 1088 (February 2015): 519–25. http://dx.doi.org/10.4028/www.scientific.net/amr.1088.519.
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Heat-cured denture base resin is an important component in removable partial dentures and complete dentures, and has been widely used in the clinic. However, during long-term use, its appearance may be affected by varying degrees of color change, affecting the appearance and longevity of the dentures. In this study we examined the color changes and water absorption and solubility of dental base resins to investigate the color stability of four types of resin materials: New Century, Heraeus, Nissin and BASIS-HI. They were soaked in artificial saliva (as control), red wine, cola, coffee and tea separately at 37°C for 1, 4 or 12 weeks. Results are presented on which the color changes of dental base resin materials were associated with different denture base resins, soak solutions and storage times. We found that most of the dental resins became darker at prolonged immersion time. Heraeus resins showed more significant changes after soaking in red wine for 12 weeks, and its water absorption and solubility values were also greater than those of the other three types of resins. The color changes of New Century, Nissin and BASIS-HI soaked in the four solutions were relatively stable. The information obtained here will help optimize maintenance of dentures and also inform choice of denture materials.