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A longitudinal study of resin-bonded prostheses
1School of Dentistry, Karolinska Institute, Huddinge, Sweden.
The Journal of Prosthetic Dentistry
|August 1, 1996
Summary
Resin-bonded prostheses often dislodge. Preparing dentin grooves and silicoating frameworks improved longevity, but bond strength to gold alloys remained insufficient, necessitating enhanced retention strategies for durable dental restorations.
Area of Science:
- Dental materials science
- Prosthodontics
- Biomaterials engineering
Background:
- Resin-bonded fixed partial dentures (RBFPDs) have historically faced high dislodgement rates.
- Current restorative techniques and materials often lack sufficient retentive qualities.
- Long-term clinical performance data for RBFPDs is crucial for improving treatment outcomes.
Purpose of the Study:
- To evaluate the long-term clinical success of resin-bonded prostheses.
- To investigate the efficacy of specific preparation techniques in preventing debonding.
- To identify factors contributing to the longevity of RBFPDs.
Main Methods:
- A longitudinal study examined 34 resin-bonded prostheses over a mean follow-up of 6 years.
- Preventive measures included preparing proximal dentin grooves in anterior abutments.
- Framework inner surfaces were treated with silicoating to enhance bonding.
Main Results:
- Five out of 34 prostheses (14.7%) experienced debonding during the study period.
- The bond strength between resin cements and high gold alloys proved inadequate against fatigue.
- The implemented preparation and surface treatment showed some benefit but did not fully resolve bond failures.
Conclusions:
- While proximal groove preparation and silicoation may enhance RBFPD longevity, bond strength remains a critical limitation.
- Further research is needed to develop frameworks with improved retention and resistance forms.
- Optimizing cementation protocols and material selection is essential for predictable long-term success of resin-bonded prostheses.