Ding Yuan-Feng, Song Li-Juan
Department 1 of Orthodontics, Affiliated Stomatological Hospital of Soochow University, Suzhou Stomatological Hospital. Suzhou 215008, Jiangsu Province, China. E-mail:
Shanghai Kou Qiang Yi Xue. 2020 Dec;29(6):656-660.
To evaluate the morphology and position of condyle and fossa and joint space of adolescent temporomandibular joint with Class Ⅱ subdivision malocclusion, in order to provide a reference for diagnosis before treatment.
The study sample consisted of 30 adolescent patients with Class Ⅱ subdivision malocclusions(9 males, 21 females, mean age 12.5 years) as the experimental group and 30 adolescent patients with Class Ⅰ malocclusions (11 males, 19 females, mean age 12 years) as the control group treated from June 2018 to December 2019 in Suzhou Stomatological Hospital. The long axis of condyle, short axis of condyle, the distance from the outer pole of condyle to sagittal midline, horizontal angle of condyle, Joint space(medial, inner, outer, anterior, superior, posterior), vertical height of condyle, width of joint fossa, depth of joint fossa, angle of posterior wall of the articular tubercle and vertical distance of bilateral condyle to horizontal line were measured on cone-beam CT(CBCT) images and analyzed with Dolphin Imaging 11.95. SPSS 23.0 software package was used for statistical analysis of the data.
In Angle Class Ⅱ subdivision malocclusion patients, there were significant differences in posterior joint space, horizontal angle of condyle, vertical height of condyle, width of joint fossa, depth of joint fossa and angle of posterior wall of the articular tubercle between neutral side and distal side(P<0.01). In Angle Class Ⅰ malocclusion patients, there was no significant difference in joint fossa morphology, condyle morphology and condyle position between right side and left side (P>0.05).
There may be differences in condyle position, condyle shape and joint fossa shape between patients with Class Ⅱ subdivision malocclusions and Class Ⅰ malocclusion patients. More attention should be paid to the temporomandibular joint in initial clinical examination and clinical orthodontic treatment.
评估安氏Ⅱ类亚类错牙合青少年颞下颌关节髁突、关节窝的形态、位置及关节间隙，为治疗前诊断提供参考。
选取2018年6月至2019年12月在苏州市口腔医院就诊的30例安氏Ⅱ类亚类错牙合青少年患者（男9例，女21例，平均年龄12.5岁）作为实验组，30例安氏Ⅰ类错牙合青少年患者（男11例，女19例，平均年龄12岁）作为对照组。在锥形束CT（CBCT）图像上测量髁突长轴、髁突短轴、髁突外极至矢状中线距离、髁突水平角、关节间隙（内侧、内、外、前、上、后）、髁突垂直高度、关节窝宽度、关节窝深度、关节结节后壁角度及双侧髁突至水平线的垂直距离，并采用Dolphin Imaging 11.95进行分析。数据采用SPSS 23.0软件包进行统计学分析。
安氏Ⅱ类亚类错牙合患者中立侧与远中侧在关节后间隙、髁突水平角、髁突垂直高度、关节窝宽度、关节窝深度及关节结节后壁角度方面差异有统计学意义（P<0.01）。安氏Ⅰ类错牙合患者右侧与左侧在关节窝形态、髁突形态及髁突位置方面差异无统计学意义（P>0.05）。
安氏Ⅱ类亚类错牙合患者与安氏Ⅰ类错牙合患者在髁突位置、髁突形态及关节窝形态上可能存在差异。在临床初诊及正畸治疗中应更加关注颞下颌关节。
