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Three-dimensional stability of new denture base resin systems
G H Latta1, W F Bowles, J E Conkin
1Department of Prosthodontics, University of Tennessee, College of Dentistry, Memphis.
The Journal of Prosthetic Dentistry
|June 1, 1990
Summary
This study found that the position of metal markers in acrylic maxillary dentures shifted significantly after processing and over time. These variations differed between the four acrylic resins tested, impacting denture stability.
Area of Science:
- Dental Materials Science
- Prosthodontics
Background:
- Acrylic resins are commonly used for denture fabrication.
- Dimensional stability of denture base materials is crucial for prosthodontic success.
- Processing and aging can affect the fit and stability of dentures.
Purpose of the Study:
- To evaluate the dimensional stability of four different acrylic resins used in maxillary denture construction.
- To assess the impact of processing and aging on the positional accuracy of denture base components.
Main Methods:
- Ten maxillary dentures were fabricated from each of four acrylic resins using a standardized technique and silicone molds.
- Metal shot markers were embedded in the dentures and cast bases.
- Radiographs (frontal, lateral, occlusal) were taken at four time points: before processing, after processing, immediately after cast removal, and 30 days later.
Main Results:
- Significant positional variations of the metal markers were observed from the baseline in all tested acrylic resin groups.
- Substantial differences in marker displacement were found between the different acrylic resin groups.
- The changes in marker position indicated dimensional instability of the denture bases over time.
Conclusions:
- The choice of acrylic resin significantly influences the dimensional stability of maxillary dentures.
- Processing and aging lead to measurable changes in denture base dimensions, potentially affecting fit and function.
- Further research is needed to identify acrylic resins with superior dimensional stability for improved denture outcomes.