Resident, Department of Prosthodontics, School of Medicine, Ewha Womans University, Seoul, Republic of Korea.
Assistant Professor, Department of Restorative Dentistry and Biomaterials Sciences, Harvard School of Dental Medicine, Boston, Mass.
J Prosthet Dent. 2019 Jan;121(1):110-117. doi: 10.1016/j.prosdent.2018.02.018. Epub 2018 Jul 10.
Limited information is available evaluating the trueness and tissue surface adaptation of computer-aided design and computer-aided manufacturing (CAD-CAM) maxillary denture bases fabricated using digital light processing (DLP).
The purpose of this in vitro study was to evaluate the trueness of DLP-fabricated denture bases and to compare the tissue surface adaptation of DLP with milling (MIL) and pack and press (PAP).
The maxillary denture bases were virtually designed on the reference cast and were fabricated using DLP and MIL. Their intaglio surfaces were scanned and superimposed on the reference computer-aided design denture base to evaluate the trueness. A total of 20 denture bases (10 per technique) were also fabricated on the duplicated master casts using DLP and MIL. Ten denture bases were additionally made using PAP. The intaglio surfaces of the dentures were scanned and superimposed on the corresponding casts to compare the degree of tissue surface adaptation among the 3 techniques. The Mann-Whitney test and Kruskal-Wallis ANOVA were used for statistical analyses (α=.05).
The trueness of the DLP denture base was significantly better than that of the MIL denture base (P<.001). Statistically significant differences were detected with respect to tissue surface adaptation of the denture base among the groups (P<.001). The DLP denture base showed the best denture base fit among the 3 techniques with a small interquartile range.
Within the limitations of this in vitro study, the DLP maxillary denture base showed better trueness and tissue surface adaptation of ≤100 μm of the 3-dimensional surface deviation than the MIL and PAP denture bases.
可用的信息有限，评估使用数字光处理（DLP）制造的计算机辅助设计和计算机辅助制造（CAD-CAM）上颌义齿基托的真实性和组织表面适应性。
本体外研究的目的是评估 DLP 制造的义齿基托的准确性，并比较 DLP 与铣削（MIL）和包压（PAP）的组织表面适应性。
参考模型上虚拟设计上颌义齿基托，并使用 DLP 和 MIL 制造。扫描其凹面并与参考计算机辅助设计义齿基托叠加，以评估准确性。总共制作了 20 个义齿基托（每种技术 10 个），使用 DLP 和 MIL 在复制的主模型上制作。另外使用 PAP 制作了 10 个义齿基托。扫描义齿的凹面并与相应的模型叠加，比较 3 种技术之间的组织表面适应性程度。使用 Mann-Whitney 检验和 Kruskal-Wallis ANOVA 进行统计分析（α=.05）。
DLP 义齿基托的准确性明显优于 MIL 义齿基托（P<.001）。组间在义齿基托的组织表面适应性方面存在统计学差异（P<.001）。在 3 种技术中，DLP 义齿基托的基托拟合最好，四分位距较小。
在本体外研究的限制内，与 MIL 和 PAP 义齿基托相比，DLP 上颌义齿基托的三维表面偏差的准确性和组织表面适应性更好，偏差值≤100μm。
