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Silane to enhance the bond between polymethyl methacrylate and titanium
1Department of Prosthodontics, School of Dentistry, University of Michigan, Ann Arbor, USA.
The Journal of Prosthetic Dentistry
|May 1, 1995
Summary
Surface pretreatment significantly improves the bond strength between titanium and acrylic resin for dental prostheses. The Rocatec bonding material enhanced shear strength by 68% compared to untreated titanium.
Area of Science:
- Biomaterials Science
- Dental Materials Science
- Surface Engineering
Background:
- Machined titanium surfaces in implant prostheses exhibit poor adhesion with acrylic resin.
- Surface pretreatment methods are explored to improve the retention of polymethyl methacrylate (PMMA) on titanium.
Purpose of the Study:
- To evaluate the efficacy of a new bonding material, Rocatec, in enhancing the bond strength between titanium and PMMA.
- To quantify the effect of alumina air abrasive and Rocatec pretreatment on titanium-PMMA shear bond strength.
Main Methods:
- Grade 2 titanium specimens were divided into two groups: untreated (Group A) and pretreated with alumina air abrasive and Rocatec (Group B).
- Heat-cured denture base resin (PMMA) was applied to titanium samples.
- Shell-Nielsen shear tests were conducted using a universal testing machine to measure bond strength in megapascals (MPa).
Main Results:
- Pretreated titanium specimens (Group B) demonstrated a significantly higher shear bond strength (23.8 +/- 1.78 MPa) compared to untreated specimens (Group A: 16.1 +/- 1.61 MPa).
- The Rocatec-pretreated group exhibited a 68% increase in shear strength (p < 0.0001).
Conclusions:
- Surface pretreatment of grade 2 titanium using 110-micron alumina air abrasive and Rocatec bonding material significantly enhances shear bond strength to PMMA.
- This pretreatment method offers a promising approach for improving the durability of implant-supported fixed prostheses.