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The cantilever fixed partial denture--a literature review
1Department of Oral Rehabilitation, Tel Aviv University, Maurice and Gabriela Goldschleger School of Dental Medicine, Israel.
The Journal of Prosthetic Dentistry
|April 1, 1992
Summary
Cantilever fixed partial dentures (FPDs) can cause abutment movement due to forces on pontics. Increasing abutments and decreasing pontics improves FPD prognosis, requiring strong abutment teeth and good oral hygiene.
Area of Science:
- Dentistry
- Prosthodontics
- Biomaterials
Background:
- Cantilever fixed partial dentures (FPDs) feature abutments at one end and unsupported pontics at the other.
- Forces on cantilevered pontics can induce tilting and rotational movements in abutments.
- Unilateral lack of terminal abutments in cross-arch FPDs activates inhibitory feedback from mechanoreceptors.
Purpose of the Study:
- To analyze the biomechanical behavior of cantilever fixed partial dentures.
- To identify factors influencing the success and failure of cantilever FPDs.
- To provide recommendations for improving the prognosis of cantilever FPD restorations.
Main Methods:
- Review of biomechanical principles governing FPD function.
- Analysis of strain patterns in distal cantilevered FPDs.
- Evaluation of clinical factors affecting FPD longevity.
Main Results:
- Greatest strain in distal cantilevered FPDs occurs mesial to the most distal retainer, correlating with fracture locations.
- Increasing the number of abutments and decreasing pontics enhances FPD prognosis.
- Abutment teeth require long roots, adequate alveolar support, sufficient preparation length, and parallel axial walls.
Conclusions:
- Optimal cantilever FPD design involves maximizing abutments and minimizing pontics.
- Adequate abutment support, harmonious occlusion, and excellent oral hygiene are crucial for FPD success.
- While osseointegrated implants offer an alternative, cantilever FPDs remain a viable treatment option, particularly as a substitute for removable partial dentures.