Related Experiment Videos
Lased and sandblasted denture base surface preparations affecting resilient liner bonding
N L Jacobsen1, D L Mitchell, D L Johnson
1Department of Removable Prosthodontics, University of Oklahoma, College of Dentistry, Oklahoma City, USA.
The Journal of Prosthetic Dentistry
|August 1, 1997
Summary
Mechanical surface preparation of denture bases using sandblasting or lasers may not improve the bond strength of resilient liners. This can prevent bacterial growth and prosthesis breakdown.
Area of Science:
- Dental Materials Science
- Biomaterials Engineering
- Prosthodontics
Background:
- Adhesive failure between denture liners and bases promotes bacterial growth and liner breakdown.
- This compromises the integrity and longevity of the prosthesis.
Purpose of the Study:
- To evaluate the impact of sandblasting and laser preparation on the interfacial bonding of polymethyl methacrylate (PMMA) with resilient liners.
- Investigate the bonding of PMMA to polyethyl methacrylate and silicone liners after surface treatments.
Main Methods:
- PMMA specimens underwent untreated, sandblasted (aluminum oxide), or CO2 laser surface treatments.
- Resilient liners (polyethyl methacrylate, silicone) were applied, and peel strengths were measured using ASTM standards.
Main Results:
- Sandblasting significantly decreased peel strengths for both liner types.
- Laser treatment also reduced peel strengths, significantly for polyethyl methacrylate but not for silicone liners compared to controls.
- Untreated PMMA showed significantly higher peel strengths with polyethyl methacrylate than with silicone liners.
Conclusions:
- Mechanical surface preparation of denture bases may not be beneficial for resilient liner adhesion.
- Rethinking surface treatments for denture bases could improve prosthesis durability.