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Three dimensional shape measurement system for residual ridges.
1Second Department of Prosthetic Dentistry, Osaka University Faculty of Dentistry, Japan.
The Journal of Osaka University Dental School
|December 1, 1992
Summary
This study introduces a new shape measurement system for residual ridges in edentulous patients. The laser-based system achieves high accuracy, crucial for designing complete dentures.
Area of Science:
- Biomedical Engineering
- Dental Prosthetics
- Measurement Science
Background:
- Accurate evaluation of residual ridges is essential for complete denture design in edentulous patients.
- Existing methods may lack the precision required for objective assessment.
- Developing advanced measurement systems can improve prosthetic outcomes.
Purpose of the Study:
- To describe a novel shape measurement system for residual ridges.
- To evaluate the accuracy of this newly developed system.
- To assess the system's performance in simulating residual ridge shapes.
Main Methods:
- The system utilizes a high-precision laser displacement meter, a controlled moving table, and a personal computer.
- Plaster models simulating residual ridges were placed on a working table moving at 0.7 mm/sec.
- Height measurements were taken intermittently at a frequency of 7 points/sec.
Main Results:
- The developed shape measurement system demonstrated a measurement error of 2.5%.
- This level of accuracy is considered highly reliable for residual ridge assessment.
- Measurement accuracy was found to decrease with darker plaster model colors.
Conclusions:
- The described shape measurement system offers a precise and objective method for evaluating residual ridges.
- The system's high accuracy supports its application in the design and construction of complete dentures.
- Further research may explore optimizing performance with different model materials or colors.