Cargando…

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...

Descripción completa

Detalles Bibliográficos
Autores principales: Yoon, Jong-Wook, Kim, Sung-Hun, Lee, Jai-Bong, Han, Jung-Suk, Yang, Jae-Ho
Formato: Texto
Lenguaje:English
Publicado: The Korean Academy of Prosthodontics 2010
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
_version_ 1782196797448388608
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
work_keys_str_mv AT yoonjongwook astudyonthefracturestrengthofcollarlessmetalceramicfixedpartialdentures
AT kimsunghun astudyonthefracturestrengthofcollarlessmetalceramicfixedpartialdentures
AT leejaibong astudyonthefracturestrengthofcollarlessmetalceramicfixedpartialdentures
AT hanjungsuk astudyonthefracturestrengthofcollarlessmetalceramicfixedpartialdentures
AT yangjaeho astudyonthefracturestrengthofcollarlessmetalceramicfixedpartialdentures
AT yoonjongwook studyonthefracturestrengthofcollarlessmetalceramicfixedpartialdentures
AT kimsunghun studyonthefracturestrengthofcollarlessmetalceramicfixedpartialdentures
AT leejaibong studyonthefracturestrengthofcollarlessmetalceramicfixedpartialdentures
AT hanjungsuk studyonthefracturestrengthofcollarlessmetalceramicfixedpartialdentures
AT yangjaeho studyonthefracturestrengthofcollarlessmetalceramicfixedpartialdentures