Study on Dimensional Stability of Resin Substrates for 3D Printed Complete Dentures

doi:10.13701/j.cnki.kqyxyj.2024.01.008

Abstract

Abstract: Objective: To quantitatively evaluate the deformation of tissue surface and each functional area of maxillary complete denture substrate printed by digital light processing (DLP) technology over a 14-day period. Methods: Six pairs of maxillary complete denture substrates were designed and printed using DLP technology based on a standard maxillary edentulous plaster model. The tissue surfaces of the substrates were scanned on day 1, 7, and 14 after printing. The scanned data and design files were imported into Geomagic 2014 software for best-fit alignment and 3D morphological deviation analysis. Further, the maxillary tissue surface was subdivided into primary stress-bearing area, secondary stress-bearing area, border seal area, relief area, and post dam area in the software, and the deformation of each functional area was quantified and analyzed over 14 days. Results: The results of 3D morphometric analysis showed that the substrate tissue surface had the greatest deformation in the bilateral maxillary tuberosity region and the post dam region in the opposite direction. The analysis of the functional areas showed that the functional areas with the least deformation were, in order, the relief area, the secondary stress-bearing area, the primary stress-bearing area, the border seal area, and the post dam area. Conclusion: The 3D printed maxillary complete denture base will undergo some deformation over time, with different amounts of deformation in each functional area.

Key words: maxillary complete denture, tissue surface, digitization, deviation analysis, dimensional stability

LI Kai, ZHANG Yan, AI Lin, ZHAO Yanfang, WU Yulu, WANG Cuilei. Study on Dimensional Stability of Resin Substrates for 3D Printed Complete Dentures[J]. Journal of Oral Science Research, 2024, 40(1): 40-45.

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