Int J Prosthodont. 2023 Sep 12;36(4):469-478. doi: 10.11607/ijp.7193.
To assess the retention and adaptation of milled and printed denture bases in comparison to conventional ones.
A total of 24 completely edentulous patients were selected. For each patient, three maxillary denture bases were constructed according to different fabrication techniques, thus defining the three groups for comparison: group 1 consisted of denture bases constructed by a conventional technique, group 2 consisted of denture bases milled from prepolymerized blocks of PMMA, and group 3 consisted of denture bases fabricated by a 3D printing technique. A digital force gauge was used for measuring the retention of the denture bases intraorally, while Geomagic Control X 64 software was used to evaluate the adaptation of the denture bases with their corresponding master casts. Repeated-measures analysis of variance was used for comparison among the groups, followed by pairwise comparison with post hoc Bonferroni correction. The significance level was set at α = .05.
Statistical analysis showed significant differences among the three groups regarding retention and adaptation. The highest values of retention and adaptation of denture bases were found in group 2 (milling group).
Within the limitations of this study, the following could be concuded: milled denture bases demonstrated better retention and adaptation than the conventional heat-polymerized and printed denture bases, and the printed denture bases showed better adaptation but similar retention to conventional heat-polymerized denture bases.
评估与传统义齿基托相比，铣削和打印义齿基托的保留和适应性。
共选择 24 名完全无牙颌患者。为每位患者根据不同的制作技术构建了三个上颌义齿基托，从而定义了三个比较组：组 1 由传统技术构建的义齿基托组成，组 2 由预聚物 PMMA 块铣削而成的义齿基托组成，组 3 由 3D 打印技术制造的义齿基托组成。使用数字力计在口腔内测量义齿基托的保留力，而Geomagic Control X 64 软件用于评估义齿基托与其相应的主模型的适应性。采用重复测量方差分析比较组间差异，然后进行事后 Bonferroni 校正的两两比较。显著性水平设为α=0.05。
统计分析显示，在保留力和适应性方面，三组之间存在显著差异。铣削组（组 2）的义齿基托保留力和适应性最高。
在本研究的限制范围内，可以得出以下结论：铣削义齿基托的保留力和适应性优于传统热聚合和打印义齿基托，而打印义齿基托的适应性较好，但保留力与传统热聚合义齿基托相似。
