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Comparison of titanium and cobalt-chromium removable partial denture clasps
J T Bridgeman1, V A Marker, S K Hummel
1Department of Biomaterials Science, Baylor College of Dentistry, Dallas, Texas, USA.
The Journal of Prosthetic Dentistry
|August 1, 1997
Summary
Titanium alloy clasps for removable partial dentures show excellent long-term retention. Despite some porosity, titanium and titanium alloys are suitable alternatives to cobalt-chromium for denture applications.
Area of Science:
- Biomaterials Science
- Dental Materials Science
- Metallurgical Engineering
Background:
- Titanium alloys are increasingly used for removable partial dentures due to their flexibility.
- Concerns exist regarding the long-term retentive force of titanium clasps after repeated use.
Purpose of the Study:
- To evaluate cast clasps made from titanium and titanium alloys for removable partial denture applications.
- To determine the suitability of these materials as alternatives to traditional alloys.
Main Methods:
- Fabrication of clasps from commercially pure titanium, Ti-6Al-4V alloy, and cobalt-chromium.
- Measurement of retention force loss over 3 years of simulated clinical use.
- Radiographic and SEM evaluation for casting defects and surface characteristics.
Main Results:
- Titanium and titanium alloy clasps exhibited less retention loss compared to cobalt-chromium at a 0.75 mm undercut.
- Increased porosity was observed in titanium and titanium alloy clasps but did not correlate with fractures or deformation.
Conclusions:
- The sustained retentive ability of titanium and titanium alloy clasps indicates their suitability for removable partial dentures.
- These materials offer a viable alternative for denture clasp fabrication.