关键词: 种植, 定位器, 测量, 导向

Abstract: Objective　To evaluate the measurement and guidance function of an oral implant locator through ex vivo experiments. Methods    The edentulous area of the pig mandible was used as the model of the alveolar ridge in the edentulous area. Cone beam computed tomography（CBCT），locator and vernier caliper were used to measure the buccal-lingual width of alveolar ridge，and the measurement result of vernier caliper was used as the standard to compare the measurement deviations of CBCT and locator. Prepare the hole by the locator（locator groups）and hand（free-hand groups）separately，and compare the angle deviation and distance deviation in the hole direction to assess the difference in the risk of lateral penetration between the two groups by CBCT. Results   （1）Measure the buccal-lingual width of the alveolar ridge：the measurement deviation of the locator ［（1.24 ± 0.491）mm ］ was slightly larger than the CBCT measurement deviation ［（0.81 ± 0.377）mm ］，and the difference was statistically significant（P = 0.025）.（2）The accuracy of measuring the direction of planting holes：the angle and distance deviation value of the locator group ［（6.05° ± 2.803°），（1.05 ± 0.302）mm ］ was significantly smaller than that of the free-hand group ［（20.50° ± 7.199°），（3.70 ± 0.971）mm ］，and the difference was statistically significant（P < 0.05）. Conclusion    This locator has both alveolar bone width measurement and assisted oral implant guidance functions. Although there are certain measurement errors，it can meet clinical requirements.

Key words: implantation, locator, measurement, guidance