摘要目的:应用锥形束CT测量分析广东地区正常青年Monson球面半径，探讨个性化测量Monson球面半径的方法，为口腔临床咬合重建提供参考。方法:采用单纯随机抽样法从广州医科大学附属口腔医院体检人群中招募60名广东地区正常 青年志愿者［男性30名，女性30名，年龄（22.1±2.0）岁（18~26岁）］，于广州医科大学附属口腔医院放射科行锥形束CT扫描，对锥形束CT数据行三维重建，对重建后模型进行定点、描图和测量，采用单样本 t检验比较男性和女性Monson球面半径的差异。 结果:60名正常 青年Monson球面半径为（100.72±4.89） mm，男性和女性Monson球面半径分别为（103.48±4.19）和（97.97±3.93） mm，男女差异有统计学意义（ P<0.01）。 结论:采用锥形束CT可准确测量Monson球面半径，结果可为 平面重建提供参考。

abstractsObjective:To measure and analyze the spherical radius of Monson of normal young people in Guangdong province using cone-beam CT (CBCT), and to establish a personalized measurement method of the spherical radius of Monson to provide a reference for clinical application of Monson spherical radius in occlusal reconstruction.Methods:Sixty healthy young adults from physical examination population at Stomatology Hospital of Guangzhou Medical University [30 males and 30 females, aged (22.1±2.0) years 18-26 years) were recruited, and their CBCT were taken. Three-dimensional reconstruction of CBCT data was carried out, and the reconstructed models were fixed, traced and measured. The difference of Monson spherical radius between male and female was compared by using a single sample t-test. Results:The Monson spherical radius was (100.72±4.89) mm. The Monson spherical radius of male and female were (103.48±4.19) mm and (97.97±3.93) mm respectively. The difference between male and female was statistically significant ( P<0.01). Conclusions:CBCT can be used to accurately measure the spherical radius of Monson and can be used as a reference for reconstruction of occlusal plane.