Accuracy of Complete Dentures Duplicated by Milling and Three-Dimensional Printed CAD/CAM Technology Using Surface Matching Digital Meter

Abstract

Objectives: With the advent of computer-aided design (CAD) software, it is now simple to locate the cross-section of the desired program area. Because the denture base image is fitted to the cast using the reference points, the measurement of the misfit using CAD software occasionally produces a negative number, which is distinct from the traditional method. Therefore, the purpose of this present study was to evaluate the accuracy of duplicating dentures made using milling and three-dimensional (3D) printed CAD/CAM (computer-aided manufacture) fabrication techniques, and a surface matching digital meter was used in this present study. Materials and Methods: For this study, 20 mandibular complete denture (CD) bases were duplicated by two dissimilar kinds of acrylic denture base materials of different CAD/CAM manufacturing methods (pre-polymerized PMMA milling blocks and 3D printing photosensitive liquid resin) from ready-made polymethyl methacrylate (PMMA) acrylic mandibular CD (reference model). For accuracy evaluation, the linear and deviation measurements were carried out using digital metrology software. Results: The results of this study exposed that the milled duplicated denture showed a statistically significant higher linear accuracy and lower deviation in comparison with the 3D printed duplicated denture. Conclusion: The milling duplication techniques can be useful for producing duplicate CDs with a high degree of accuracy.