Objective: Damages in removable dentures occur as denture base fractures, debonding of artifical teeth.The aim of this study was to investigate the type and the localization of the damages occured in removable dentures in terms of denture cracks, denture fractures and tooth debondings. Method: A total of 109 removable dentures needing repairs were examined according to the type and the localization of the cracks, fractures and tooth debondings. Results: Of the 109 dentures needing repairs examined, 63.3% were complete dentures, 32.1% were metal-framework and 4.6% were acrylic based partial dentures. The results showed that most commonly needing repair was upper complete dentures and the most frequent type of damage was midline cracks (53.6%) and midline fractures (35.7%) in denture bases. Midline fractures in lower complete dentures were 90% and there was no crack in lower complete dentures.In upper metal-based partial dentures, rate of fractures of retentive meshwork was 75%. In lower metal-based partial dentures, fractures of meshwork and clasps were 42.9%. In upper and lower acrylic-based complete dentures, only fractures of denture flanges (100%) were examined. Debonding of artifical teeth in removable dentures were 47.7% and the adhesive and cohesive failure rates were 82.7% and 17.3%, respectively. Conclusion: To reduce the need of denture repairs, close attention is recommended in the clinical design and laboratory making to increase the strength of the denture bases especially at the interface between the major connector and the retentive meshwork.

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