A Survey to Assess The Failure in Crowns and Fixed Partial Dentures: An In Vivo Study.

Purpose: As the prevalence of failures of fixed prostheses have increased the need to assess the causes of failure of such prostheses have also increased to avoid all possible errors and thus achieving efficient treatment. This study was done to assess and survey clinically the failure rates of the fixed prosthesis according to the dental supported fixed prosthetic failure scale.

Materials and methods: A total of 156 patients were selected for the study who reported to the Department of fixed prosthodontics with complaints related to fixed dental prosthesis. Failure classification in prosthetic restorations was made with Manappallil's failure level scale. The SPSS program version 22 was used for statistical analysis. Relationships between categorical variables were determined by a Chi-square test.

Results: A total number of 253 failed fixed dental prostheses were evaluated. Majority of failures (39%) were found to be class 3 failure, which include unserviceable restorations. Porcelain fused to metal (PFM) prostheses showed more failure percentage (79%) than other types of prostheses. The results shows a statistically significant difference in the failure class of prosthesis according to prosthesis type, and its position in the dental arch.

Conclusion: Within the limitation of this survey, it was found that almost all of failed prostheses require replacement and the patients applied to the prosthodontics clinic when the rate of complications increased. Therefore proper patient selection, careful diagnosis, treatment planning, clinical and technical skills, and plane schedule of follow-up care must be kept in mind to provide successful treatment.

Clinical significance: By knowing the severity of the prosthodontics failures, we can provide a proper treatment plan so that the restoration will have a long time prognosis. Int J Prosthodont. 10.11607/ijp.8632.