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Comparative Evaluation of Marginal Accuracy of Metal Copings Fabricated using Direct Metal Laser Sintering, Computer-Aided Milling, Ringless Casting, and Traditional Casting Techniques: An In vitro Study
PURPOSE: The purpose of the study is to determine the amount of marginal discrepancy produced by Co-Cr copings fabricated using various fabrication methods which include direct metal laser sintering (DMLS), computer-aided milling, traditional casting, and ringless casting and compare the values obta...
Autores principales: | , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Medknow Publications & Media Pvt Ltd
2018
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6104364/ https://www.ncbi.nlm.nih.gov/pubmed/30166838 http://dx.doi.org/10.4103/ccd.ccd_191_18 |
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author | James, Annu Eliza Umamaheswari, B. Shanthana Lakshmi, C. B. |
author_facet | James, Annu Eliza Umamaheswari, B. Shanthana Lakshmi, C. B. |
author_sort | James, Annu Eliza |
collection | PubMed |
description | PURPOSE: The purpose of the study is to determine the amount of marginal discrepancy produced by Co-Cr copings fabricated using various fabrication methods which include direct metal laser sintering (DMLS), computer-aided milling, traditional casting, and ringless casting and compare the values obtained between each fabrication technique and to evaluate if the fabrication technique can produce prosthesis that is within the standards of clinical acceptance of marginal discrepancy. MATERIALS AND METHODS: Ten metal copings were fabricated by DMLS, computer-aided milling, traditional casting, and ringless casting. Marginal gap at the buccal, lingual, mesial, and distal areas was measured using silicone replica technique. A digital microscope was used to measure the silicone layer. Statistical analysis was done using one-way ANOVA test and post hoc Bonferroni test to test the difference between the fabrication method and categories of measured points, respectively. RESULTS: The values indicate that the marginal gap was least for the copings fabricated using ringless casting followed by traditional casting and DMLS. The widest gap was seen in copings fabricated using computer-aided milling. Analysis of results showed statistically significant difference between copings fabricated using computer-aided milling and traditional casting (P = 0.029 and 0.043 – mesial and distal, respectively) and computer-aided milling and ringless casting (P = 0.002 and 0.001 – mesial and distal, respectively). CONCLUSION: Even though the marginal gap was found to vary with the fabrication method, all measurements of marginal gap of all groups were well within the standard clinical acceptance of 120 μ. |
format | Online Article Text |
id | pubmed-6104364 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2018 |
publisher | Medknow Publications & Media Pvt Ltd |
record_format | MEDLINE/PubMed |
spelling | pubmed-61043642018-08-30 Comparative Evaluation of Marginal Accuracy of Metal Copings Fabricated using Direct Metal Laser Sintering, Computer-Aided Milling, Ringless Casting, and Traditional Casting Techniques: An In vitro Study James, Annu Eliza Umamaheswari, B. Shanthana Lakshmi, C. B. Contemp Clin Dent Original Article PURPOSE: The purpose of the study is to determine the amount of marginal discrepancy produced by Co-Cr copings fabricated using various fabrication methods which include direct metal laser sintering (DMLS), computer-aided milling, traditional casting, and ringless casting and compare the values obtained between each fabrication technique and to evaluate if the fabrication technique can produce prosthesis that is within the standards of clinical acceptance of marginal discrepancy. MATERIALS AND METHODS: Ten metal copings were fabricated by DMLS, computer-aided milling, traditional casting, and ringless casting. Marginal gap at the buccal, lingual, mesial, and distal areas was measured using silicone replica technique. A digital microscope was used to measure the silicone layer. Statistical analysis was done using one-way ANOVA test and post hoc Bonferroni test to test the difference between the fabrication method and categories of measured points, respectively. RESULTS: The values indicate that the marginal gap was least for the copings fabricated using ringless casting followed by traditional casting and DMLS. The widest gap was seen in copings fabricated using computer-aided milling. Analysis of results showed statistically significant difference between copings fabricated using computer-aided milling and traditional casting (P = 0.029 and 0.043 – mesial and distal, respectively) and computer-aided milling and ringless casting (P = 0.002 and 0.001 – mesial and distal, respectively). CONCLUSION: Even though the marginal gap was found to vary with the fabrication method, all measurements of marginal gap of all groups were well within the standard clinical acceptance of 120 μ. Medknow Publications & Media Pvt Ltd 2018 /pmc/articles/PMC6104364/ /pubmed/30166838 http://dx.doi.org/10.4103/ccd.ccd_191_18 Text en Copyright: © 2018 Contemporary Clinical Dentistry http://creativecommons.org/licenses/by-nc-sa/4.0 This is an open access journal, and articles are distributed under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike 4.0 License, which allows others to remix, tweak, and build upon the work non-commercially, as long as appropriate credit is given and the new creations are licensed under the identical terms. |
spellingShingle | Original Article James, Annu Eliza Umamaheswari, B. Shanthana Lakshmi, C. B. Comparative Evaluation of Marginal Accuracy of Metal Copings Fabricated using Direct Metal Laser Sintering, Computer-Aided Milling, Ringless Casting, and Traditional Casting Techniques: An In vitro Study |
title | Comparative Evaluation of Marginal Accuracy of Metal Copings Fabricated using Direct Metal Laser Sintering, Computer-Aided Milling, Ringless Casting, and Traditional Casting Techniques: An In vitro Study |
title_full | Comparative Evaluation of Marginal Accuracy of Metal Copings Fabricated using Direct Metal Laser Sintering, Computer-Aided Milling, Ringless Casting, and Traditional Casting Techniques: An In vitro Study |
title_fullStr | Comparative Evaluation of Marginal Accuracy of Metal Copings Fabricated using Direct Metal Laser Sintering, Computer-Aided Milling, Ringless Casting, and Traditional Casting Techniques: An In vitro Study |
title_full_unstemmed | Comparative Evaluation of Marginal Accuracy of Metal Copings Fabricated using Direct Metal Laser Sintering, Computer-Aided Milling, Ringless Casting, and Traditional Casting Techniques: An In vitro Study |
title_short | Comparative Evaluation of Marginal Accuracy of Metal Copings Fabricated using Direct Metal Laser Sintering, Computer-Aided Milling, Ringless Casting, and Traditional Casting Techniques: An In vitro Study |
title_sort | comparative evaluation of marginal accuracy of metal copings fabricated using direct metal laser sintering, computer-aided milling, ringless casting, and traditional casting techniques: an in vitro study |
topic | Original Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6104364/ https://www.ncbi.nlm.nih.gov/pubmed/30166838 http://dx.doi.org/10.4103/ccd.ccd_191_18 |
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