Related Experiment Videos
Changes in occlusal vertical dimension in microwave processing of complete dentures.
Débora Barros Barbosa1, Marco Antonio Compagnoni, Cláudio Rodrigues Leles
1Department of Dental Materials and Prosthodontics, Faculty of Dentistry, São Paulo State University, Araraquara, SP, Brazil.
Brazilian Dental Journal
|November 14, 2002
Summary
Microwave curing cycles for complete dentures showed minimal changes in vertical dimension. While most microwave methods were comparable to water bath curing, specific cycles resulted in significant dimensional variations.
Area of Science:
- Dental Materials Science
- Prosthodontics
- Polymerization Techniques
Background:
- Complete dentures require precise fabrication to maintain occlusal vertical dimension (OVD).
- Microwave polymerization offers potential advantages in denture processing time and efficiency.
- Understanding the impact of different microwave curing cycles on OVD is crucial for clinical success.
Purpose of the Study:
- To investigate the effect of varying microwave curing cycles on the dimensional stability of complete dentures.
- To compare microwave polymerization methods with conventional water bath curing in terms of OVD changes.
- To identify specific microwave parameters that may influence OVD alterations.
Main Methods:
- Four groups of 12 maxillary complete dentures were fabricated.
- Three groups were polymerized using different microwave curing cycles.
- One control group was polymerized using a conventional water bath method.
- Occlusal vertical dimension changes were measured using pin opening.
Main Results:
- The average pin opening across all groups was less than 0.5 mm.
- No statistically significant difference in OVD changes was observed between microwave and water bath cured groups.
- Statistically significant differences in OVD changes were found between specific microwave curing cycles (Group 2 vs. Group 3).
Conclusions:
- Microwave polymerization can be a viable alternative to water bath curing for complete dentures with generally comparable OVD stability.
- Specific microwave curing parameters can lead to significant, yet small, variations in occlusal vertical dimension.
- Further research into optimizing microwave curing cycles is warranted to ensure predictable OVD outcomes.