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Temporary Implant-Supported Single Crowns Using Titanium Base Abutments: An In Vitro Study on Bonding Stability and
The International Journal of Prosthodontics
|September 21, 2020
Summary
Cementation protocols significantly impact the stability of temporary implant crowns. Airborne particle abrasion and MMA-based liquid conditioning enhance retention on titanium bases, but conventional temporary abutments may offer superior outcomes.
Area of Science:
- Dental Materials Science
- Biomaterials Engineering
- Prosthodontics
Background:
- Temporary implant-supported crowns are crucial for maintaining function and aesthetics during osseointegration.
- The interface between the crown and abutment is critical for the long-term stability of temporary restorations.
- Various cementation protocols exist, but their impact on the durability of temporary implant crowns requires further investigation.
Purpose of the Study:
- To evaluate how different cementation protocols affect the bonding interface stability and pull-out forces of temporary implant-supported crowns.
- To compare the performance of crowns bonded to a titanium base abutment (TiB) versus a temporary titanium abutment (TiA).
Main Methods:
- Sixty implants were restored with PMMA-based CAD/CAM crowns, divided into five groups based on abutment type and surface treatment.
- Treatments included resin conditioning, airborne particle abrasion with Al2O3 or silica-coated Al2O3, and silanization.
- Specimens underwent artificial aging (120,000 cycles) followed by analysis of bonding interface failure and pull-out forces.
Main Results:
- Bonding failure rates after aging varied significantly, from 0% in the TiA group to 100% in some TiB groups.
- The TiA group exhibited significantly greater pull-out forces compared to other groups.
- Airborne particle abrasion with silica-coated Al2O3 followed by MMA-based liquid conditioning (TiB/30SiOAl-SRc) also showed improved retention.
Conclusions:
- Cementation protocols critically influence the bonding stability and retention of temporary implant crowns.
- Airborne particle abrasion and MMA-based liquid conditioning can improve the retention of temporary restorations on titanium bases.
- Conventional temporary abutments may provide more reliable outcomes for temporary implant-supported crowns compared to titanium base abutments with tested protocols.
