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KMID : 1157520230190040051
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International Journal of Clinical Preventive Dentistry
2023 Volume.19 No. 4 p.51 ~ p.56
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Comparison of Fitness of Digital Denture Bases Produced Using CAD
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Kim Nam-Joong
Song Do-Hun
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Abstract
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Objective: The purpose of this study is to compare the suitability of a denture base by manufacturing a denture base designed using three methods: milling PMMA, 3D printing, and injecting resin and thermal polymerization after burying milled wax.
Methods: Prepare 3 sets of 11 standard models to compare the fit, and design a denture base for each model using the Dental CAD program. After 3D printing, PMMA milling, and wax milling, the designed denture bases are manufactured by three methods, 11 each. To check the gap between the model and the base, apply silicone to the inner surface of the denture base and press it with constant pressure. When it is cured, it is scanned once again with the silicone present, and the thickness of the silicone is measured by merging it with the first model. The measured values are analyzed through a statistical program (SPSS).
Results: Looking at the average value of the gap between each measurement area according to the manufacturing method, the 3D printing method showed the smallest overall value. In the right alveolar line, the milling method showed the largest gap, and in the center of the palate, PMMA milling showed the largest gap. Also, the curing method showed the highest value in the left alveolar line, and there was no statistically significant difference between the manufacturing methods in the center of the palate and the left alveolar line.
Conclusion: 3D printing showed the best fit for denture bases manufactured using CAD/CAM system, but the gap in the center of the palate was larger than the left and right alveolar lines in all three methods.
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KEYWORD
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fitness, denture base, wax milling, 3D printing
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