Venkatesh Swapna Bettanapalya, Nayak Vaishnavi M, Sulaya Kavishma, Shetty Smitha Sammith
Department of Prosthodontics and Crown& Bridge, Manipal College of Dental Sciences, Manipal, Manipal Academy of Higher Education (MAHE), Manipal, 576104, Karnataka, India.
Department of Oral Pathology and Microbiology, Manipal College of Dental Sciences, Manipal, Manipal Academy of Higher Education (MAHE), Manipal, 576104, Karnataka, India.
J Oral Biol Craniofac Res. 2025 Jan-Feb;15(1):11-15. doi: 10.1016/j.jobcr.2024.11.004. Epub 2024 Nov 26.
Intraoral scanners used for the fabrication of milled and 3D-printed complete dentures simplify the procedure. However, its effectiveness in recording the functional peripheral seal area needs to be researched. Therefore, this study aims to assess the retention of conventional, milled and 3D-printed denture bases made from conventional impression technique and digital scans in different types of post palatal seal area.
Completely edentulous participants were divided into group A and group B based on type of posterior palatal seal area. Each group received three denture bases fabricated using compression molding, milling and 3D printing. The retention was evaluated using a digital dynamometer at 45° and 90° inclination.
The ANOVA test revealed statistically significant difference in the retention of denture bases fabricated using three different techniques. When compared between the three groups at 45 and 90°, statistically significant difference in the retentive values between the control and other two groups were observed.
All three of the fabrication processes have retention that falls within a clinically acceptable range. 3D printed dentures had better adaptation on the PPS area whereas the milled dentures had a better peripheral seal although the conventional process showed highest retention values.
用于制作铣削和3D打印全口义齿的口内扫描仪简化了制作过程。然而，其在记录功能性边缘封闭区域方面的有效性需要研究。因此，本研究旨在评估采用传统印模技术和数字扫描制作的传统、铣削和3D打印义齿基托在不同类型后腭部封闭区域的固位力。
根据后腭部封闭区域的类型，将无牙颌参与者分为A组和B组。每组接受使用压缩成型、铣削和3D打印制作的三种义齿基托。使用数字测力计在45°和90°倾斜度下评估固位力。
方差分析测试显示，使用三种不同技术制作的义齿基托的固位力存在统计学上的显著差异。在45°和90°时，三组之间进行比较，观察到对照组与其他两组之间在固位值上存在统计学上的显著差异。
所有三种制作工艺的固位力都在临床可接受范围内。3D打印义齿在PPS区域具有更好的贴合度，而铣削义齿具有更好的边缘封闭，尽管传统工艺显示出最高的固位值。
