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Bonding the Titanium Attachment Matrix Housing to Acrylic Overdentures Using Different Primers, Adhesives, and Resin
Mohammadreza Nakhaei1, Hosein Dashti2, Sepideh Sasannejad3
1Dental Materials Research Center, Department of Prosthodontics, School of Dentistry, Mashhad University of Medical Sciences, Mashhad, Iran.
International Journal of Dentistry
|April 16, 2025
Summary
Improving the bond strength of attachment matrix housing (AMH) in overdentures is crucial. Protocols using G-Premio BOND on titanium and Quick Up or autopolymerizing acrylic resin on the denture base showed the best adhesion, enhancing durability.
Area of Science:
- Dental Materials Science
- Biomaterials Engineering
- Prosthodontics
Background:
- Dislodgement of attachment matrix housing (AMH) from acrylic resin bases is a significant issue in overdenture fabrication.
- Ensuring a robust and lasting bond between AMH and the acrylic component is essential for overdenture longevity.
- Multifunctional monomers in primers and adhesives may enhance the adhesion between dissimilar materials.
Purpose of the Study:
- To evaluate the impact of various bonding protocols on the shear bond strength (SBS) of resin materials to titanium (Ti) and denture acrylic bases.
- To compare the effectiveness of different surface treatments and adhesive systems in improving the bond between AMH and acrylic resin.
Main Methods:
- Sixty poly methyl methacrylate (PMMA) blocks and 60 AMH were prepared and divided into six groups for each substrate.
- Specimens were subjected to different bonding strategies including primers, flowable resin composites, and autopolymerizing acrylic resins.
- Following 5000 thermal cycles, shear bond strength (SBS) was measured, and failure modes were analyzed.
Main Results:
- For acrylic resin bonding, Quick Up, autopolymerizing acrylic resin, and air abrasion + SR Connect primer + flowable resin composite showed comparable high SBS.
- For titanium (Ti) housing, G-Premio BOND + resin composite, ALLOY PRIMER + G-Premio BOND + resin composite, and Monobond Plus primer + Multilink Hybrid Abutment demonstrated superior SBS.
- ALLOY PRIMER did not significantly enhance adhesion to the Ti substrate when used with G-Premio BOND or Quick Up.
Conclusions:
- The application of G-Premio BOND (with or without ALLOY PRIMER) on Ti substrates and Quick Up or autopolymerizing acrylic resin on the acrylic base yielded the best adhesion for AMH in overdentures.
- Specific bonding protocols can significantly improve the bond strength between attachment matrix housing and denture base materials.
- ALLOY PRIMER's efficacy in enhancing Ti adhesion in this context was not confirmed.
