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An evaluation of wear of human enamel opposed by ceramics of different surface finishes
STATEMENT OF PROBLEM: Surface of porcelain restoration is a matter of clinical concern because of its abrasive action on the opposing enamel. PURPOSE: This study comparatively evaluated wear of enamel when opposed by three different surface finishes of ceramic. MATERIALS AND METHODS: A total of 60 m...
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Medknow Publications & Media Pvt Ltd
2015
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Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4762315/ https://www.ncbi.nlm.nih.gov/pubmed/26929496 http://dx.doi.org/10.4103/0972-4052.155031 |
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author | Mulay, Gauri Dugal, Ramandeep Buhranpurwala, Murtuza |
author_facet | Mulay, Gauri Dugal, Ramandeep Buhranpurwala, Murtuza |
author_sort | Mulay, Gauri |
collection | PubMed |
description | STATEMENT OF PROBLEM: Surface of porcelain restoration is a matter of clinical concern because of its abrasive action on the opposing enamel. PURPOSE: This study comparatively evaluated wear of enamel when opposed by three different surface finishes of ceramic. MATERIALS AND METHODS: A total of 60 metal-ceramic discs (10 mm × 2 mm) with different surface finishes were fabricated. They were divided into four groups of autoglazed ceramic surface, over glazed ceramic surface, ceramic surface polished with Shofu polishing kit and ceramic surface polished with DFS polishing wheels and paste. Each group comprised of 15 discs. Sixty human teeth samples were prepared from freshly extracted, unrestored, caries free, nonattrited maxillary first premolars. Each tooth sample was weighed before wear testing using AT200 Mettler Toledo electronic analytical balance of 0.0001 g accuracy. Occlusal surfaces of these teeth were then abraded against the substrates in a wear machine for a total of 10,000 cycles. Each tooth sample was weighed after 5000 cycles and after the total of 10,000 cycles, respectively, using the same balance. Differences in weight of tooth samples before and after wear testing were evaluated statistically using one-way analysis of variance and Bonferroni's correction for multiple group comparisons. RESULTS: The values obtained for percentage weight loss after 10,000 cycles for over glazed ceramic surface were marginally higher than values obtained for autoglazed surface. It was observed that values obtained for percentage weight loss by polished ceramic after 10,000 cycles were statistically less as compared to the values obtained with autoglazed and over glazed ceramic surface (P < 0.001). There was no statistically significant difference between the values obtained by polished ceramic surfaces of two different groups. CONCLUSION: Enamel wear produced by polished porcelain is substantially less than autoglazed and over glazed porcelain. No significant difference was found in enamel wear when opposed by ceramic surfaces polished by two different methods. This study indicates the potential damage porcelain can inflict upon enamel and suggests that porcelain should be polished instead of over glazed. |
format | Online Article Text |
id | pubmed-4762315 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2015 |
publisher | Medknow Publications & Media Pvt Ltd |
record_format | MEDLINE/PubMed |
spelling | pubmed-47623152016-04-01 An evaluation of wear of human enamel opposed by ceramics of different surface finishes Mulay, Gauri Dugal, Ramandeep Buhranpurwala, Murtuza J Indian Prosthodont Soc Original Article STATEMENT OF PROBLEM: Surface of porcelain restoration is a matter of clinical concern because of its abrasive action on the opposing enamel. PURPOSE: This study comparatively evaluated wear of enamel when opposed by three different surface finishes of ceramic. MATERIALS AND METHODS: A total of 60 metal-ceramic discs (10 mm × 2 mm) with different surface finishes were fabricated. They were divided into four groups of autoglazed ceramic surface, over glazed ceramic surface, ceramic surface polished with Shofu polishing kit and ceramic surface polished with DFS polishing wheels and paste. Each group comprised of 15 discs. Sixty human teeth samples were prepared from freshly extracted, unrestored, caries free, nonattrited maxillary first premolars. Each tooth sample was weighed before wear testing using AT200 Mettler Toledo electronic analytical balance of 0.0001 g accuracy. Occlusal surfaces of these teeth were then abraded against the substrates in a wear machine for a total of 10,000 cycles. Each tooth sample was weighed after 5000 cycles and after the total of 10,000 cycles, respectively, using the same balance. Differences in weight of tooth samples before and after wear testing were evaluated statistically using one-way analysis of variance and Bonferroni's correction for multiple group comparisons. RESULTS: The values obtained for percentage weight loss after 10,000 cycles for over glazed ceramic surface were marginally higher than values obtained for autoglazed surface. It was observed that values obtained for percentage weight loss by polished ceramic after 10,000 cycles were statistically less as compared to the values obtained with autoglazed and over glazed ceramic surface (P < 0.001). There was no statistically significant difference between the values obtained by polished ceramic surfaces of two different groups. CONCLUSION: Enamel wear produced by polished porcelain is substantially less than autoglazed and over glazed porcelain. No significant difference was found in enamel wear when opposed by ceramic surfaces polished by two different methods. This study indicates the potential damage porcelain can inflict upon enamel and suggests that porcelain should be polished instead of over glazed. Medknow Publications & Media Pvt Ltd 2015 /pmc/articles/PMC4762315/ /pubmed/26929496 http://dx.doi.org/10.4103/0972-4052.155031 Text en Copyright: © 2015 The Journal of Indian Prosthodontic Society http://creativecommons.org/licenses/by-nc-sa/3.0 This is an open access article distributed under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike 3.0 License, which allows others to remix, tweak, and build upon the work non-commercially, as long as the author is credited and the new creations are licensed under the identical terms. |
spellingShingle | Original Article Mulay, Gauri Dugal, Ramandeep Buhranpurwala, Murtuza An evaluation of wear of human enamel opposed by ceramics of different surface finishes |
title | An evaluation of wear of human enamel opposed by ceramics of different surface finishes |
title_full | An evaluation of wear of human enamel opposed by ceramics of different surface finishes |
title_fullStr | An evaluation of wear of human enamel opposed by ceramics of different surface finishes |
title_full_unstemmed | An evaluation of wear of human enamel opposed by ceramics of different surface finishes |
title_short | An evaluation of wear of human enamel opposed by ceramics of different surface finishes |
title_sort | evaluation of wear of human enamel opposed by ceramics of different surface finishes |
topic | Original Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4762315/ https://www.ncbi.nlm.nih.gov/pubmed/26929496 http://dx.doi.org/10.4103/0972-4052.155031 |
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