Browse

A study on the fracture strength of collarless metal-ceramic fixed partial dentures

Cited 4 time in Web of Science Cited 6 time in Scopus
Authors
Yoon, Jong-Wook; Kim, Sung-Hun; Lee, Jai-Bong; Han, Jung-Suk; Yang, Jae-Ho
Issue Date
2010
Publisher
KOREAN ACAD PROSTHODONTICS
Citation
JOURNAL OF ADVANCED PROSTHODONTICS, Vol.2, No.4, pp.134-141
Keywords
Fracture strengthPorcelain marginCollarless metal-ceramic fixed partial dentureModified collarless coping
Abstract
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. [J Adv Prosthodont 2010;2:134-41]
ISSN
2005-7806
Language
English
URI
http://hdl.handle.net/10371/80545
DOI
https://doi.org/10.4047/jap.2010.2.4.134
Files in This Item:
Appears in Collections:
College of Dentistry/School of Dentistry (치과대학/치의학대학원)Dept. of Dentistry (치의학과)Journal Papers (저널논문_치의학과)
  • mendeley

Items in S-Space are protected by copyright, with all rights reserved, unless otherwise indicated.

Browse