A complete denture, consisting of teeth and a gum base, is a standard device used to restore masticatory and esthetic functions in patients with complete edentulism. The different colors and mechanical properties for teeth and the gum base mean a complete denture is manufactured using two materials with different mechanical properties. This study proposes a method to make a complete denture using a laboratory-developed, multiresin additive manufacturing (MRAM) system with two resins and different mechanical properties. A tenon joint is used to create the bottom of the teeth that fit into the gum base, ensuring automatic alignment and higher bending strength. The mechanical properties, material waste, fabrication time, and effect of the tenon joint on the bending strength of a complete denture printed using the MRAM system are compared with the values for a computer-aided design and computer-aided manufacturing (CAD/CAM) system. Experimental results show that the printed denture is manufactured 3 times faster and produces 14 times less material waste, but is 35.08% less inaccurate than one produced using a CAD/CAM system. The proposed tenon joint increases the bending strength by 31.94%. The MRAM system is applicable for printing a complete denture.

中文翻译：

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打印完整义齿的多树脂增材制造工艺及精度分析

全口义齿由牙齿和牙龈基托组成，是一种标准装置，用于恢复完全无牙患者的咀嚼和审美功能。牙齿和牙龈基托的不同颜色和机械性能意味着全口义齿是使用两种具有不同机械性能的材料制造的。本研究提出了一种使用实验室开发的多树脂增材制造 (MRAM) 系统制作全口义齿的方法，该系统具有两种树脂和不同的机械性能。榫头接头用于创建适合牙龈底部的牙齿底部，确保自动对齐和更高的弯曲强度。机械性能、材料浪费、制造时间、将榫接头对使用 MRAM 系统打印的全口义齿的弯曲强度和影响与计算机辅助设计和计算机辅助制造 (CAD/CAM) 系统的值进行了比较。实验结果表明，与使用 CAD/CAM 系统生产的义齿相比，打印义齿的制造速度提高了 3 倍，材料浪费减少了 14 倍，但不准确度降低了 35.08%。拟议的榫接头将抗弯强度提高了 31.94%。MRAM系统适用于打印全口义齿。拟议的榫接头将抗弯强度提高了 31.94%。MRAM系统适用于打印全口义齿。拟议的榫接头将抗弯强度提高了 31.94%。MRAM系统适用于打印全口义齿。