AngleⅡ类错患者髁突表面积与体积三维重建测量

目的运用锥束CT(CBCT)测量AngleⅡ类错患者髁突的表面积和体积,探讨AngleⅡ类错患者髁突形态大小的特点。方法选择该院正畸科就诊患者中年龄为20～28岁的AngleⅡ类错患者66例(男33例,女33例)进行CBCT检查,运用Mimics10.0软件对左、右两侧髁突进行三维重建,测量其表面积与体积,计算髁突形态指数。并与AngleⅠ类错患者髁突大小进行比较。结果 AngleⅡ类错患者男性的髁突体积与表面积均大于女性(P<0.05)。AngleⅡ类错患者右侧髁突的体积与表面积均大于左侧。AngleⅡ类错患者髁突的体积与表面积均小于AngleⅠ类错患者(P<0.05)。髁突形态指数在各组间差异无统计学意义(P>0.05)。结论 AngleⅡ类错患者的髁突大小与性别和髁突位置有关。且AngleⅡ类错患者髁突小于AngleⅠ类错患者。

Three-dimensional reconstruction study of condyle volume and surface area in Angle′s class II malocclusion patients

Objective To measure the condyle volume and surface area in the patients with Angle′s class Ⅱ malocclusion by cone-beam CT(CBCT) and to study the characteristics of mandibular condylar size.Methods 66 young patients with Angle′ s class Ⅱ malocclusion were chosen from our hospital(aged 20-28 years;33 males and 33 females).All patients received CBCT examination,the CT slice used the Mimics 10.0 software for three-dimensional reconstruction of the condyle to measure the condyle volume,surface area and shape index(ratio of volume and surface area).The comparison between class Ⅱ malocclusion patients and class Ⅰ malocclusion patients was performed.Results The condyle volume and surface area in male patients with class Ⅱ malocclusion were significantly greater than those in female patients(P<0.05),and the condyle volume and surface area in right condyle were significantly greater than those in left condyle(P<0.05).The condyle volume and surface area in class Ⅱ malocclusion patients were less than those in class Ⅰ malocclusion patients(P<0.05).The condylar morphology index had no significant difference among various groups(P>0.05).Conclusion The condyle volume is related to the genders and condyle position.The size of mandibular condyle in class Ⅱ malocclusion patients is smaller than classⅠ malocclusion patients.