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In vitro wear of resin denture teeth
S Hirano1, K B May, W C Wagner
1Department of Prosthodontics, School of Dentistry, University of Michigan, Ann Arbor, USA.
The Journal of Prosthetic Dentistry
|March 26, 1998
Summary
DB Plus and MLI composite denture teeth showed significantly less wear than acrylic resin teeth after 10,000 cycles. This indicates superior wear resistance for composite materials in dental restorations.
Area of Science:
- Dental Materials Science
- Biomaterials Engineering
Background:
- Wear resistance is a critical property for artificial teeth in restoring edentulous patients.
- Maintaining stable occlusal relationships over time is essential for denture longevity and function.
Purpose of the Study:
- To compare the in vitro wear characteristics of four distinct resin denture teeth.
- To evaluate the wear performance of these artificial teeth against human enamel.
Main Methods:
- A mechanical wear testing device subjected five denture tooth samples against five enamel abraders.
- Tests were conducted over two 5,000-cycle periods (10,000 cycles total) under a 13.4 N load.
- All wear tests were performed in human saliva, with wear measured after each period.
Main Results:
- Acrylic resin teeth (Classic and Kenson) exhibited significantly greater wear than composite teeth (DB Plus and MLI) after 10,000 cycles.
- Kenson teeth showed more wear than Classic teeth.
- No significant wear differences were observed between the two composite denture teeth (DB Plus and MLI).
Conclusions:
- DB Plus and MLI resin denture teeth demonstrated approximately 50% less wear compared to Classic and Kenson teeth when opposed by human enamel.
- Composite resin denture teeth offer superior wear resistance against natural enamel.
- These findings have implications for the selection of materials in artificial tooth fabrication for improved durability.