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Adhesive bond strength and compliance for denture soft lining materials
John F McCabe1, Thomas E Carrick, Hiroshi Kamohara
1Dental Materials Science Unit, The Dental School, University of Newcastle upon Tyne, UK. j.f.mccabe@ncl.ac.uk
Biomaterials
|January 24, 2002
Summary
Denture soft liner bond strength depends on material stiffness and adhesive type. Stiffer liners showed higher tensile strength but lower peel strength, with ethyl acetate adhesives outperforming toluene-based ones.
Area of Science:
- Materials Science
- Biomaterials Engineering
- Prosthodontics
Background:
- Polyvinylsiloxane (PVS) soft liners enhance denture comfort but require strong adhesion to acrylic resin bases.
- Understanding bond strength is crucial for denture longevity and patient satisfaction.
Purpose of the Study:
- To evaluate the peel bond strength and tensile bond strength of PVS denture soft liners to acrylic resin bases.
- To investigate the influence of soft liner compliance and adhesive system on bond performance.
Main Methods:
- Three PVS soft liners with varying filler content and compliance were tested.
- Two adhesive systems (ethyl acetate and toluene-based) were used for bonding.
- Peel bond strength and tensile bond strength were measured, and failure modes analyzed.
Main Results:
- Low compliance (stiffer) liners yielded higher tensile bond strength when failure was adhesive.
- Low compliance liners exhibited lower peel bond strength.
- Ethyl acetate adhesives resulted in higher bond strengths and cohesive failure compared to toluene-based adhesives.
Conclusions:
- Material compliance significantly affects bond strength, with different trends for tensile and peel tests.
- Adhesive system choice is critical, with ethyl acetate-based adhesives promoting better overall bond integrity.
- Stress concentration at the interface influences peel bond strength, especially for stiffer materials.