Abstract: Objective To evaluate the application of computer aided design & computer aided manufacturing ( CAD/CAM）surgical template to measure the operation error in multianodontia patients. Methods A total of 20 multianodontia patients were selected and their CT DICOM data were analyzed by the EFeature Tooth Implant Client was used to design the locus and determine the implant surgery plan. Guide plate and implant were put intraorally, then immediate repair base in a corresponding size was selected, and immediate restoration was put in the patients mouth 48h after the surgery. At the same time, patients took CT for the measurement of the depth of the implants in the jaw, the angle of mesiodistally direction and faciolingual inclination of implants to see the operation error and observe the survival rate of the implants in the 3rd month, 6th month and one year. Results A total of 139 implants of 20 patients had accurate locations and only 2 implants fell off during followup. The gingival tissues of other 137 implants were in healthy condition with no periimplantitis occurring. Conclusion Computer aided design & computer aided manufacturing surgical template and immediate loading can improve the accuracy of implants locations and give dentists guidance. However, their long term effects need to be confirmed by further followup.

Key words: computeraided implantology, immediate loading, surgical template, 3D rapid prototyping technology