Ciocca Leonardo, Maltauro Mattia, Cimini Valerio, Breschi Lorenzo, Montanari Angela, Anderlucci Laura, Meneghello Roberto
Oral and Maxillo-Facial Prosthodontics, Section of Prosthodontics, Department of Biomedical and Neuromotor Science, Alma Mater Studiorum University of Bologna, Bologna, Italy.
Department of Management and Engineering, University of Padova, Vicenza, Italy.
J Adv Prosthodont. 2023 Feb;15(1):22-32. doi: 10.4047/jap.2023.15.1.22. Epub 2023 Feb 23.
Digital technology has enabled improvements in the fitting accuracy of denture bases via milling techniques. The aim of this study was to evaluate the trueness and precision of digital and analog techniques for manufacturing complete dentures (CDs).
Sixty identical CDs were manufactured using different production protocols. Digital and analog technologies were compared using the reference geometric approach, and the Δ-error values of eight areas of interest (AOI) were calculated. For each AOI, a precise number of measurement points was selected according to sensitivity analyses to compare the Δ-error of trueness and precision between the original model and manufactured prosthesis. Three types of statistical analysis were performed: to calculate the intergroup cumulative difference among the three protocols, the intergroup among the AOIs, and the intragroup difference among AOIs.
There was a statistically significant difference between the dentures made using the oversize process and injection molding process ( < .001), but no significant difference between the other two manufacturing methods ( = .1227). There was also a statistically significant difference between the dentures made using the monolithic process and the other two processes for all AOIs ( = .0061), but there was no significant difference between the other two processes ( = 1). Within each group, significant differences among the AOIs were observed.
The monolithic process yielded better results, in terms of accuracy (trueness and precision), than the other groups, although all three processes led to dentures with Δ-error values well within the clinical tolerance limit.
数字技术已通过铣削技术提高了义齿基托的贴合精度。本研究的目的是评估制造全口义齿（CD）的数字技术和模拟技术的准确性和精确性。
使用不同的生产方案制造60副相同的全口义齿。采用参考几何方法比较数字技术和模拟技术，并计算八个感兴趣区域（AOI）的Δ误差值。对于每个AOI，根据敏感性分析选择精确数量的测量点，以比较原始模型与制造的假体之间的准确性和精确性的Δ误差。进行了三种类型的统计分析：计算三种方案之间的组间累积差异、AOI之间的组间差异以及AOI之间的组内差异。
采用超大尺寸工艺和注塑工艺制作的义齿之间存在统计学显著差异（<.001），但其他两种制造方法之间无显著差异（=.1227）。对于所有AOI，采用整体式工艺制作的义齿与其他两种工艺制作的义齿之间也存在统计学显著差异（=.0061），但其他两种工艺之间无显著差异（=1）。在每组内，观察到AOI之间存在显著差异。
就准确性（真度和精度）而言，整体式工艺比其他组产生了更好的结果，尽管所有三种工艺制作的义齿的Δ误差值都远在临床公差范围内。
