An Investigation of the Reasons for Failure in Patients with A Fixed Prosthesis

Complications seen in tooth-supported fixed prosthetic restorations are mentioned in many places in the literature. In order to make more successful prostheses, it is important to establish a relationship between patients’ complaints and clinical and radiological findings. The study was conducted with 90 patients between 2019-2020. The aim of this study was to compare the failure rates of the fixed prosthesis used by the patients according to the dental supported fixed prosthetic failure scale in terms of age, gender, clinical and radiological status, education level, duration of use, and prosthesis material.

Methods: Failure classification in prosthetic restorations was made with Manappallil’s failure level scale seen in tooth-supported fixed prostheses. The SPSS v20 program was used to analyze the data. Categorical variables were presented as numbers and percentages while numerical variables were presented as mean and standard deviation. Relationships between numerical variables, student T test, Kruskal Wallis and Spearman correlation tests, and relationships between categorical variables were determined by a chi-square test. p <0.05 was considered statistically significant.

Results: While there was a significant relationship between failure class and prosthesis type (crown or bridge), there was no relation between (p<0.05) mean age, prosthesis type, and prosthetic material. There was a moderate positive correlation between age and failure classes (p<0.001, r=0.39). It was observed that there was a significant relationship between duration of prosthesis use and failure classes (p<0.05). There was a low degree of positive correlation between age and duration of use (p<0.05, r=0.23). There was no relationship between the clinical condition and radiological findings of the patient and the education level and failure classification.

Keywords: Tooth supported fixed dental prosthesis; Complication; Failure classification; Prognosis