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Split-frame implant prosthesis designed to compensate for mandibular flexure: a clinical report
Carmen Yamily Paez1, Thomas Barco, Sally Roushdy
1School of Dentistry, Indiana University, Indianapolis, Ind 46033, USA. cypaezpi@iupui.edu
The Journal of Prosthetic Dentistry
|April 12, 2003
Summary
Mandibular flexure can loosen screws in implant-supported dentures. Separating the prosthesis at the midline can relieve stress on implants and the denture, improving stability.
Area of Science:
- Dental Implantology
- Prosthodontics
- Biomechanics
Background:
- Restoring an edentulous mandible with multiple implants and a metal bar can lead to biomechanical complications.
- Mandibular flexure is a significant factor contributing to stress and strain in implant-supported prostheses.
Observation:
- Screw loosening and excessive stress on the prosthesis and implants occur with rigid, bar-retained mandibular restorations.
- The natural movement and flexure of the mandible can negatively impact the longevity of fixed implant prostheses.
Findings:
- Separating the hybrid mandibular denture at the midline effectively mitigates stresses and strains.
- A midline separation technique reduces the detrimental effects of mandibular flexure on implant-supported restorations.
Implications:
- This technique offers a solution to improve the functional longevity and stability of implant-supported mandibular dentures.
- Midline separation is a valuable consideration for clinicians managing complex edentulous mandible reconstructions.