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Linear dimensional variability of three denture base resins after processing and in water storage
D L Dixon1, L C Breeding, K G Ekstrand
1Department of Prosthodontics, University of Iowa, College of Dentistry, Iowa City.
The Journal of Prosthetic Dentistry
|July 1, 1992
Summary
Denture base resins showed minimal dimensional changes during curing and water storage. These changes were not statistically significant and unlikely to be clinically noticeable for dental applications.
Area of Science:
- Materials Science
- Biomaterials Science
- Dental Materials
Background:
- Denture base resins are known to undergo dimensional changes, including shrinkage during curing and expansion during water storage.
- These dimensional variations can potentially affect the fit and stability of dentures.
Purpose of the Study:
- To measure and compare the linear dimensional changes of three different denture base resins during processing and after prolonged water storage.
- To evaluate the clinical significance of these dimensional changes in denture base materials.
Main Methods:
- Three denture base resins (Triad, Accelar 20, and Lucitone 199) were tested under both long- and short-curing conditions.
- Linear dimensional changes were recorded during curing and after 30, 60, and 90 days of water immersion.
Main Results:
- Accelar 20 resin demonstrated the least curing shrinkage, while short-cured Lucitone 199 exhibited the most.
- After 90 days of water storage, only Accelar 20 showed shrinkage from its processed state.
- All observed dimensional changes (shrinkage and expansion) were minimal and not statistically significant.
Conclusions:
- The dimensional stability of the tested denture base resins is high, with negligible changes observed.
- These minor dimensional variations are unlikely to be clinically detectable, suggesting good performance in terms of fit and stability over time.