Abstract: Abstract：Objective To evaluate the value of computer navigation +homemade surgical guide technique in the area of the posterior mandible. Methods Make model of the teeth lost region，then select implantation poin and the first guide was made. CT data was collected and Simplant software was used for data analysis；use a grinding instrument to determine the direction of the final implantation and final surgical guides. The guides were worn，then measure preoperative and postoperative angle and depth deviation. Results By comparing the measured data，the portion of implants in the buccolingual direction had a deviation，which was about 10 degree；angulation abutment can adjust the dental prosthetic restoration to a correct occlusion relationship. Planting depth and mesiodistal had small deviations before and after the implant. Conclusion The system can help clinicians to implant under inadequate height conditions，which is of great significance in improving the quality and accuracy of implant surgery.

摘要： 目的 评价计算机辅助设计和自制牙支持式导板应用于下颌后牙区种植的临床疗效。方法 选择2012年4-9月山西医科大学口腔医院口腔外科收治的下颌后牙区单颗缺失患者10例，制取缺牙区牙列模型，选取植入点，制作初导板。采集CT数据，利用Simplant软件对数据分析，使用研磨仪在模型上确定最后植入方向并制作最终导板。口内戴入导板，植入种植体，拍摄CT，测量术前术后角度及深度偏差。结果 种植体在颊舌向与模拟植入体方向存在偏差，但偏差角度在10°以内，可以通过角度基台调整以适应咬合关系。种植深度及近远中向角度术前、术后偏差较小。结论 该系统可指导临床医生在下颌骨高度不足条件下植入种植体，对于提高种植手术质量与精度具有重要意义。