数字化口腔修复（20）--数字化全口覆盖义齿的临床应用（附病例报告）

目的：利用计算机辅助设计与制造（ computer aided design／computer aided manufacturing，CAD／CAM）技术，制作数字化的全口覆盖义齿并评价其修复效果。方法：临床病例为上下颌各残余经根管治疗和金属根帽修复的两个残根的无牙颌患者，按照传统全口义齿的临床操作完成印模，哥特式弓记录轨迹，面弓转移牙合记录，上牙合架，再经过扫描牙合架上的模型，在CAD虚拟牙合架上完成虚拟排牙和虚拟咬合运动，CAM切削基托蜡型和成品人工牙，最后将人工牙安放在切削基托蜡型咬合面的基底上。经过传统试排牙和三维数字化试排牙后，患者满意后，常规充胶，完成全口覆盖义齿制作并戴牙。结果：数字化全口覆盖义齿的固位和稳定良好，美观，能够正常行使咀嚼功能。结论：数字化全口覆盖义齿与传统的全口覆盖义齿比较，具有简单数字化排牙工艺，牙合设计精确，形成的牙合曲线完美，基托厚薄一致，患者适应期短的优点，是今后全口义齿制作的发展方向。

Digital restorative dentistry and prosthodontics(20)---A clinical application of digital over-complete denture (a case report)

Objective:The aimed of this article is to use computer aided design/computer aided manufacturing ( CAD/CAM) technique to fabricate a case of edentulous patient by digital over-complete dentures.Methods:An edentulous patient,who had two residue roots which were finished root canal treatments and restoration of metal caps,was retorted with digital over-complete denture as follow procedures:according to clinical operation of conventional complete denture to do im-pression,to record Gothic arch tracing,to transfer occlusal record with facebow,to set up articulator,to scan articulator with model,to finish virtual arrangement of teeth and occlusal movement in CAD virtual articulator,to mill the wax base and artifi-cial tooth,to connect artificial tooth to wax base.The patient was satisfied with both tying in the conventional wax pattern of digital over-complete denture and in three dimensional digital virtual wax pattern.Processing the acrylic resin and finishing adjustment and insertion of digital over-complete dentures.Results:The denture ’ s retention and stability were better, it worked aesthetically and had well function.Conclusion:The digital complete overdentures compared to conventional den-tures,had many advantages as follow:technology of digital arrangement of teeth, the precise occlusal design and occlusal curve,consistent thickness of base plate,and short adaptation for patient.Therefore,it had to be a development direction for production of full denture in future.