基于三维重建模型的国人距骨的内偏角及跖倾角测量

Measurement of declination angle and inclination angle based on three-dimensional reconstruction model of talus

目的通过测量健康成年人距骨的内偏角及跖倾角,为临床进钉角度及术后复位评价提供详细、可靠的数据标准。方法从2018年3月至2019年2月期间在天津医院共纳入40名健康成年志愿者,男女各20名。扫描CT后获得DICOM格式双侧踝关节数据,通过Mimics19.0软件进行距骨的三维重建后,使用3-matic功能对距骨内偏角、跖倾角进行测量。组间数据比较采用t检验。结果健康成人受试者内偏角为26.3°±3.2°(20.1°~32.7°),跖倾角为40.8°±2.5°(35.0°~45.7°)。男性内偏角为:左侧26.0°±3.3°,右侧26.1°±3.2°;跖倾角为:左侧40.1°±2.5°,右侧40.1°±2.5°。女性内偏角为:左侧26.5°±3.3°,右侧26.6°±3.2°;跖倾角为:左侧41.4°±2.8°,右侧41.6°±2.2°。同性之间左右侧距骨内偏角、跖倾角比较差异均无统计学意义。(t=-0.520^-0.166,均P>0.05)。异性之间同侧距骨内偏角及跖倾角比较结果差异均无统计学意义。(t=-2.001^-0.457,均P>0.05)。结论健康成年人的左右距骨内偏角及跖倾角呈对称分布,无明显性别差异,临床上可用内偏角及跖倾角为进钉角度及复位评价提供参照标准。

Objective To measure the declination angle and inclination angle of talus in healthy adults to provide a detailed and reliable data standard for clinical nail angle and postoperative reduction evaluation.Methods A total of 40 healthy adult volunteers were included in Tianjin Hospital from March 2018 to February 2019,including 20 males and 20 females.Bilateral ankle joint data in DICOM format were obtained after CT scan.After three-dimensional reconstruction of talus by Mimics19.0 software,the declination angle and inclination angle of talus were measured by 3-matic function.Data were compared between groups by using t test.Results The declination angle of healthy adult subjects was 26.3°±3.2°(20.1°-32.7°),and the inclination angle was 40.8°±2.5°(35.0°-45.7°).The declination angle in the male was 26.0°±3.3°on the left side,26.1°±3.2°on the right side,and the inclination angle was 40.1°±2.5°on the left and 40.1°±2.5°on the right.The declination angle in the female was 26.5°±3.3°on the left side,26.6°±3.2°on the right side,and the inclination angle was 41.4°±2.8°on the left and 41.6°±2.2°on the right.There was no significant difference in declination angle and inclination angle between the left and right talus of the same gender(t=-0.520--0.166,all P>0.05).There was no significant difference in the declination angle and inclination angle of the ipsilateral talus between the genders(t=-2.001--0.457,all P>0.05).Conclusion The declination angle and the inclination angle of left and right talus in healthy adults are symmetrically distributed,and there is no significant gender difference,the results can be used to provide reference criteria for nail angle and reduction evaluation.