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Effect of tooth preparation design on bond strengths of resin-bonded prostheses: a pilot study
M A el Salam Shakal1, P Pfeiffer, R D Hilgers
1University at Cologne, Germany.
Statement Of Problem:
The success rate of resin-bonded fixed partial dentures is directly related to the adhesive system and the tooth preparation design for good retention.
Purpose Of Study:
This in vitro study evaluated the effect of various tooth preparation designs on the bond strength of retainers for adhesive fixed partial dentures.
Material And Methods:
Molar teeth were prepared in the conventional form or with occlusal coverage and opposing grooves and retainers were silicoated and bonded to etched enamel by a bis-glycerol methacrylate adhesive. Bond strengths were determined after water storage and thermocycling.
Results:
The least mean bond strength was recorded for the conventional form of tooth preparation (p < 0.05).
Conclusion:
A combination of 180-degree opposing groove placement at line angles "wraparound" and occlusal coverage resulted in the greatest bonding values.
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