Success Rate of Tooth-Supported Overdenture Abutment, Department of Medical Services, Ministry of Public Health
Keywords:success rate, survival rate, tooth-supported overdenture, coping prosthesis, affecting factors
Background: Tooth supported overdentures have been made for aging patients in the institute of Dentistry continuously due to its major benefits. However, this treatment outcomes have never been systematically evaluated. Studying the treatment outcomes and associating factors can improve treatment efficacy.
Objectives: to evaluate the success rate of treatment of Tooth-supported Overdenture Abutment Teeth (TOAT) with coping restoration as well as factors affecting the treatment outcome.
Methods: patients who underwent tooth-supported overdenture at the Institute of Dentistry, Department of Medical Services, Ministry of Public Health, Thailand during January 2009 to December 2017 were clinically and radiographically examined. Previous data were reviewed.
Results: among 184 patients who underwent tooth-supported overdenture, 105 patients (55 men and 50 women) with the mean age of 70 (47-90) years were recalled to participate in this study. The recall rate was 56.1% with the average recall interval of 4.3 years. The total number of abutment teeth were 230 while 20 abutment were extracted within the first 2 years after treatment. The survival rate of TOAT is 91.3% (210/230). The remaining 210 TOAT with coping were clinically examined and underwent radiographic evaluation. Treatment outcomes of this study were considered in 3 aspects: endodontic aspect (67.4% healed VS 8.2% disease), periodontal aspect (92.4% maintenance VS 7.6% progression) and restorative aspect (82.9% success VS 14.3 %failures). Among several factors analyzed, statistically significant factors associated with treatment outcomes are medical welfare scheme, frequency of patient recall, apical pathology, extension of root canal filling, underlying medical condition, Kennedy classification and gingival inflammation.
Conclusions: this study demonstrates that restoring procedures of TOAT in our institute has satisfactory outcomes and high success rate. However, the outcomes are affected by several factors which should be concerned and monitoring for further improvement of the treatment outcomes.
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