Lin Rui, Zhou Man-Li, Min Min, Zhang Xian-Fang, Qian Wen-Hao
Dental Disease Control Institute, Xuhui District. Shanghai 20032, China. E-mail:
Shanghai Kou Qiang Yi Xue. 2024 Oct;33(5):471-475.
To compare the trueness of the tissue surface of the complete denture base among the digital cutting complete denture, the digital 3D printing complete denture and the conventional complete denture.
Three edentulous patients were selected, and three complete dentures were made for each case. Cutting dentures (cutting group), 3D printed dentures(printing group) were considered as the experimental groups, traditional dentures (traditional group) were considered as the control group. The tissue surface of complete denture model and denture base were scanned and their 3D data were obtained. Geomagic software was used to fit the model information with the tissue surface information of the denture base. A total of 8 regions were selected in the upper and lower complete dentures, and 10 points were randomly selected in each region. The average value of the absolute deviation value(Dm) of each region was calculated. SPSS 22.0 software package was used to analyze the Dm in a total of 24 regions of the three pairs of dentures.
The absolute mean deviation was (0.056±0.025) mm in the cutting group, (0.103±0.038) mm in the printing group, and (0.096±0.039) mm in the traditional group, which were significantly different among the three groups(P＜0.05). The trueness of the ablation group was better than that of the conventional group, and the difference was significant (P＜0.05). The trueness of the printing group was worse than that of the traditional group, and the difference was not significant(P＞0.05).
The trueness of cutting dentures is better than that of traditional dentures, while the trueness of 3D printed dentures is not significantly better than that of traditional dentures.
比较数字化切削全口义齿、数字化3D打印全口义齿和传统全口义齿基托组织面的贴合度。
选取3例无牙颌患者，为每例患者制作3副全口义齿。将切削义齿（切削组）、3D打印义齿（打印组）作为实验组，传统义齿（传统组）作为对照组。对全口义齿模型及义齿基托的组织面进行扫描，获取其三维数据。使用Geomagic软件将模型信息与义齿基托的组织面信息进行拟合。在上、下全口义齿中总共选取8个区域，每个区域随机选取10个点。计算每个区域绝对偏差值（Dm）的平均值。使用SPSS 22.0软件包对三副义齿总共24个区域的Dm进行分析。
切削组的绝对平均偏差为（0.056±0.025）mm，打印组为（0.103±0.038）mm，传统组为（0.096±0.039）mm，三组间差异有统计学意义（P＜0.05）。切削组的贴合度优于传统组，差异有统计学意义（P＜0.05）。打印组的贴合度比传统组差，差异无统计学意义（P＞0.05）。
切削义齿的贴合度优于传统义齿，而3D打印义齿的贴合度不比传统义齿显著更好。
