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Occlusal force pattern during mastication in dentitions with mandibular fixed partial dentures supported on
The Journal of Prosthetic Dentistry
|August 1, 1987
Summary
Osseointegrated cantilever prostheses in edentulous patients show chewing patterns similar to natural teeth. However, jaw muscles work harder, and cantilever segments experience high forces, yet failures are rare.
Area of Science:
- Dental Implantology
- Prosthodontics
- Biomechanics
Background:
- Edentulous patients often receive fixed prostheses on osseointegrated implants.
- Mandibular bilateral posterior two-unit cantilever fixed prostheses are used for restoration.
- These prostheses occlude with complete maxillary dentures.
Purpose of the Study:
- To investigate the occlusal force pattern in edentulous patients with specific implant-supported cantilever prostheses.
- To compare chewing patterns with natural dentitions and other prosthetic solutions.
- To assess the forces on cantilever segments during function.
Main Methods:
- Eight edentulous patients were studied.
- Occlusal forces during chewing and biting were measured.
- Chewing patterns were analyzed and compared to existing literature.
Main Results:
- Chewing patterns were comparable to healthy dentitions or tooth-supported fixed partial dentures.
- Increased voluntary capacity of jaw-closing muscles was observed during chewing and swallowing.
- Posterior cantilever segments experienced the largest local forces, contrary to some previous findings.
Conclusions:
- Fixture-supported cantilever prostheses demonstrate functional chewing patterns.
- Despite high localized forces on cantilever segments, material failures are infrequent in long-term studies.
- These prostheses represent a reliable restorative option for edentulous patients.