TITLE:
Porcelain fracture of metal-ceramic tooth-supported and implant-supported restorations: A review
AUTHORS:
Rola M. Shadid, Nasrin R. Sadaqah, Layla Abu-Naba’a, Wael M. Al-Omari
KEYWORDS:
Metal-Ceramic; Fracture; Implant-Supported Restoration; Screw-Retained
JOURNAL NAME:
Open Journal of Stomatology,
Vol.3 No.8,
November
15,
2013
ABSTRACT:
Metal-ceramic restorations are widely used in dentistry
with a high degree of general success. However, fracture of these restorations
does occur and usually frustrates both the dentist and the patient. Objective:
This literature review discusses the factors that may lead to the fracture of
these restorations whether they are tooth-supported or implant-supported with
the aim of making dentists and technicians aware of these factors to avoid them. Factors reviewed include:
technical factors, dentist-related factors, inherent material
properties, direction, magnitude and frequency of applied loads, environmental
factors, screw-retained implant-supported restorations, and posterior cantilevered
prostheses. Material and Methods: A netbased search in “Pubmed” was performed
and combined with a manual search. The search was limited to articles written
in English. Conclusions: the published literature revealed that the factors predisposing to fracture of metal-ceramic restorations may be related to the technician,
dentist, patient, environment, design of the restoration, or to inherent structure of ceramics and others. However, if the dentist and technician understand
these factors and respect the physical characteristics of the materials, most
of those are avoidable.