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Evaluation of three silicoating methods for resin-bonded prostheses
1Department of Prosthodontics, Karolinska Institute, Huddinge, Sweden.
Scandinavian Journal of Dental Research
|August 1, 1993
Summary
The original Silicoater technique offers superior resin-to-metal bond strength for dental prostheses, particularly with cobalt-chromium and titanium alloys. Silicoating enhances bond strength through chemical action, improving dental restoration durability.
Area of Science:
- Biomaterials Science
- Dental Materials
- Surface Engineering
Background:
- Achieving durable resin-to-metal bonds is crucial for the longevity of dental prostheses.
- Various surface treatments exist to enhance adhesion between metal alloys and resin cements.
- Understanding the efficacy of different techniques and materials is essential for clinical success.
Purpose of the Study:
- To compare the bond strength of three different surface treatment methods for resin-to-metal bonding.
- To evaluate the influence of different metal substrates (gold, cobalt-chromium, titanium) on bond strength.
- To assess the effect of storage and thermocycling on bond durability.
Main Methods:
- Three surface treatment techniques were evaluated: original Silicoater, Silicoater MD, and Rocatec system.
- Bond strength was tested on gold, cobalt-chromium (Co-Cr) alloy, and titanium specimens.
- Specimens underwent immediate bonding, storage with protective film, and thermocycling for durability assessment.
- Scanning electron microscopy (SEM) and energy-dispersive X-ray analysis (EDAX) were used for surface analysis.
Main Results:
- Silicoating significantly increased resin-to-metal bond strength compared to sandblasted surfaces alone.
- The original Silicoater technique yielded the highest bond strengths, especially with Co-Cr and titanium.
- Silicoater MD showed the lowest bond strengths across all tested metals.
- Resin bond strength to gold decreased after thermocycling when using the Rocatec system, but not for Co-Cr and titanium.
- Most resin cements performed similarly, except for Microfill Pontic, which resulted in weaker bonds.
Conclusions:
- Silicoating enhances resin-to-metal retention primarily through chemical interactions, not just improved mechanical interlocking.
- The original Silicoater technique is recommended for maximizing bond strength with Co-Cr and titanium alloys in dental applications.
- The choice of surface treatment and resin cement can impact the long-term durability of resin-bonded prostheses.