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Failure of maxillary canine retainers for fixed prostheses
The International Journal of Prosthodontics
|September 1, 1989
Summary
Retainers on maxillary canine teeth in fixed prostheses fail more often than expected. This study identifies canine crown shape, biting forces, and tooth movement as key reasons for this high failure rate.
Area of Science:
- Dental prosthetics
- Biomaterials science
- Clinical dentistry
Background:
- Fixed prostheses rely on abutment teeth for retention.
- Retainer failure is a significant concern in fixed prosthodontics.
- Maxillary canines are frequently used as abutment teeth.
Purpose of the Study:
- To investigate the high failure rate of retainers on maxillary canines in fixed prostheses.
- To identify factors contributing to retainer failure on these specific teeth.
- To propose clinical strategies to mitigate these failures.
Main Methods:
- Statistical analysis of fixed prostheses with failed retainers.
- Evaluation of abutment tooth distribution within the dental arch.
- Clinical assessment of canine crown morphology and occlusal forces.
Main Results:
- Retainers on maxillary canines exhibit a disproportionately high failure rate.
- Canine crown form, occlusal force distribution, and abutment tooth displacement paths are identified as contributing factors.
- A correlation between these factors and retainer failure was established.
Conclusions:
- The unique characteristics of maxillary canines contribute to increased retainer failure.
- Understanding these factors is crucial for improving prosthesis longevity.
- Clinical techniques can be adapted to address these specific challenges and enhance retainer success.