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A study on the fracture strength of collarless metal-ceramic fixed partial dentures
PURPOSE: The objective of this study was to evaluate fracture strength of collarless metal-ceramic FPDs according to their metal coping designs. MATERIALS AND METHODS: Four different facial margin design groups were investigated. Group A was a coping with a thin facial metal collar, group B was a co...
Autores principales: | , , , , |
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Formato: | Texto |
Lenguaje: | English |
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The Korean Academy of Prosthodontics
2010
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3024503/ https://www.ncbi.nlm.nih.gov/pubmed/21264192 http://dx.doi.org/10.4047/jap.2010.2.4.134 |
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author | Yoon, Jong-Wook Kim, Sung-Hun Lee, Jai-Bong Han, Jung-Suk Yang, Jae-Ho |
author_facet | Yoon, Jong-Wook Kim, Sung-Hun Lee, Jai-Bong Han, Jung-Suk Yang, Jae-Ho |
author_sort | Yoon, Jong-Wook |
collection | PubMed |
description | PURPOSE: The objective of this study was to evaluate fracture strength of collarless metal-ceramic FPDs according to their metal coping designs. MATERIALS AND METHODS: Four different facial margin design groups were investigated. Group A was a coping with a thin facial metal collar, group B was a collarless coping with its facial metal to the shoulder, group C was a collarless coping with its facial metal 1 mm short of the shoulder, and group D was a collarless coping with its facial metal 2 mm short of the shoulder. Fifteen 3-unit collarless metal-ceramic FPDs were fabricated in each group. Finished FPDs were cemented to PBT (Polybutylene terephthalate) dies with resin cement. The fracture strength test was carried out using universal testing machine (Instron 4465, Instron Co., Norwood MA, USA) at a cross head speed of 0.5 mm/min. Aluminum foil folded to about 1 mm of thickness was inserted between the plunger tip and the incisal edge of the pontic. Vertical load was applied until catastrophic porcelain fracture occurred. RESULTS: The greater the bulk of unsupported facial shoulder porcelain was, the lower the fracture strength became. However, there were no significant differences between experimental groups (P > .05). CONCLUSION: All groups of collarless metal-ceramic FPDs had higher fracture strength than maximum incisive biting force. Modified collarless metal-ceramic FPD can be an alternative to all-ceramic FPDs in clinical situations. |
format | Text |
id | pubmed-3024503 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2010 |
publisher | The Korean Academy of Prosthodontics |
record_format | MEDLINE/PubMed |
spelling | pubmed-30245032011-01-24 A study on the fracture strength of collarless metal-ceramic fixed partial dentures Yoon, Jong-Wook Kim, Sung-Hun Lee, Jai-Bong Han, Jung-Suk Yang, Jae-Ho J Adv Prosthodont Original Article PURPOSE: The objective of this study was to evaluate fracture strength of collarless metal-ceramic FPDs according to their metal coping designs. MATERIALS AND METHODS: Four different facial margin design groups were investigated. Group A was a coping with a thin facial metal collar, group B was a collarless coping with its facial metal to the shoulder, group C was a collarless coping with its facial metal 1 mm short of the shoulder, and group D was a collarless coping with its facial metal 2 mm short of the shoulder. Fifteen 3-unit collarless metal-ceramic FPDs were fabricated in each group. Finished FPDs were cemented to PBT (Polybutylene terephthalate) dies with resin cement. The fracture strength test was carried out using universal testing machine (Instron 4465, Instron Co., Norwood MA, USA) at a cross head speed of 0.5 mm/min. Aluminum foil folded to about 1 mm of thickness was inserted between the plunger tip and the incisal edge of the pontic. Vertical load was applied until catastrophic porcelain fracture occurred. RESULTS: The greater the bulk of unsupported facial shoulder porcelain was, the lower the fracture strength became. However, there were no significant differences between experimental groups (P > .05). CONCLUSION: All groups of collarless metal-ceramic FPDs had higher fracture strength than maximum incisive biting force. Modified collarless metal-ceramic FPD can be an alternative to all-ceramic FPDs in clinical situations. The Korean Academy of Prosthodontics 2010-12 2010-12-31 /pmc/articles/PMC3024503/ /pubmed/21264192 http://dx.doi.org/10.4047/jap.2010.2.4.134 Text en © 2010 The Korean Academy of Prosthodontics http://creativecommons.org/licenses/by-nc/3.0 This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited. |
spellingShingle | Original Article Yoon, Jong-Wook Kim, Sung-Hun Lee, Jai-Bong Han, Jung-Suk Yang, Jae-Ho A study on the fracture strength of collarless metal-ceramic fixed partial dentures |
title | A study on the fracture strength of collarless metal-ceramic fixed partial dentures |
title_full | A study on the fracture strength of collarless metal-ceramic fixed partial dentures |
title_fullStr | A study on the fracture strength of collarless metal-ceramic fixed partial dentures |
title_full_unstemmed | A study on the fracture strength of collarless metal-ceramic fixed partial dentures |
title_short | A study on the fracture strength of collarless metal-ceramic fixed partial dentures |
title_sort | study on the fracture strength of collarless metal-ceramic fixed partial dentures |
topic | Original Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3024503/ https://www.ncbi.nlm.nih.gov/pubmed/21264192 http://dx.doi.org/10.4047/jap.2010.2.4.134 |
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