Abstract:
The purpose of this study was to evaluate leucite reinforced glass ceramic
(IPS Empress) partial coverage restoration (PCR) on endodontically treated molars.
A total of 95 IPS Empress PCRs placed in 89 patients selected from the
post and crown waiting list of the Department of Prosthodontics, Faculty of Dentistry,
Mahidol University, were evaluated according to the United States Public Health
Service (USPHS) evaluation system. In addition, restoration fractures and tooth
fractures, patient satisfaction, pocket depth, and the papilla bleeding index (PBI), were
included. Statistical analysis was performed to determine the survival rate with
Kaplan-Meier analysis.
The results based on USPHS criteria show a success rate of 84.2% after 4
years for IPS Empress PCRs. Associated factors (location in jaw, position of molar,
number of proximal contacts, and opposing dentition) have no influence on the 4-year
survival rate of IPS Empress PCRs (Log-Rank test; P-value > 0.05). In conclusion, the
4-year survival rate of IPS Empress PCRs has shown a satisfactory outcome (84.2%).
All failures are bulk fractures.