Related Experiment Video
Updated: May 30, 2025
06:17
Production of a Strain-Measuring Device with an Improved 3D Printer
Published on: January 30, 2020
6.0K
Evaluation of Fitting Accuracy of Light- and Auto-Polymerizing Reline Materials Using Three-Dimensional Measurement
Miona Utsumi1, Natsuko Murakami1, Toshiki Yamazaki1
1Department of Advanced Prosthodontics, Institute of Science Tokyo, Tokyo 113-8510, Japan.
Polymers
|January 25, 2025
Summary
Auto-polymerizing reline materials provide a superior fit for removable partial dentures (RPDs) compared to light-polymerizing options. This study utilized 3D analysis to confirm better adaptation of auto-polymerizing materials to edentulous models.
Area of Science:
- Dental Materials Science
- Prosthodontics
- Biomedical Engineering
Background:
- Removable partial denture (RPD) incompatibility arises from residual ridge resorption during long-term use.
- Light-polymerizing reline materials offer enhanced chairside workability over conventional auto-polymerizing materials.
- Accurate RPD fit is crucial for patient comfort and function, especially after relining.
Purpose of the Study:
- To evaluate and compare the fitting accuracy of light-polymerizing (LP) and auto-polymerizing (AP) reline materials.
- To assess the efficacy of conventional fitting tests combined with 3D measurements for detailed fit analysis.
- To determine the optimal reline material for improving RPD compatibility and addressing residual ridge resorption.
Main Methods:
- Comparative evaluation of LP (HikariLiner) and AP (Rebase III) reline materials.
- Measurement of gaps between relined denture bases and simplified edentulous models.
- Three-dimensional (3D) data superimposition for analyzing displacement and deviation of relined RPDs.
Main Results:
- AP materials demonstrated significantly smaller gaps at all measurement points in the edentulous model compared to LP materials.
- The alveolar ridge crest exhibited significantly larger gaps than other sites in the edentulous model.
- Root Mean Square (RMS) values at the residual ridge crest were significantly lower for AP materials in the partial denture model.
Conclusions:
- The 3D scanning and comparison method is effective for detailed analysis of reline material fit.
- Auto-polymerizing reline materials offer superior fitting accuracy compared to light-polymerizing materials for RPDs.
- Further enhancements in scanning accuracy are recommended for future fit assessments.
