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Implant-supported cantilevered fixed partial dentures
1Private practitioner, affiliated with Faculty of Medicine, University of British Columbia, Vancouver, British Columbia, Canada.
Evidence-Based Dentistry
|June 26, 2010
Summary
Implant-supported fixed partial dentures with cantilever extensions show a 5-year survival rate of 91.9%, but may have higher technical complication rates. Caution is advised due to limited data on these cantilever prostheses.
Area of Science:
- Dental Implantology
- Prosthodontics
- Biomaterials Science
Background:
- This review evaluates the survival and complication rates of implant-supported fixed partial dentures (FPDP) with cantilever extensions.
- Studies included systematic reviews and longitudinal studies with at least 5 years of functional time.
Discussion:
- Cantilever FPDP demonstrated a 5-year survival rate of 91.9%, with implant fracture being the primary failure cause.
- Non-cantilever FPDP showed a higher 5-year survival rate (95.8%).
- Technical complications occurred more frequently in cantilever FPDP (20.3%) compared to non-cantilever designs (9.7%).
Key Insights:
- Cantilever FPDP exhibited a 5-year event-free survival rate of 71.7%, versus 85.9% for non-cantilever designs.
- Common complications included porcelain fractures and screw loosening.
- No significant differences in marginal bone loss were observed between the groups.
Outlook:
- Limited data necessitates cautious interpretation of survival and complication rates for cantilever FPDP.
- Further research is needed to fully understand the long-term performance and optimize designs for cantilever implant-borne prostheses.