Huqh Mohamed Zahoor Ul, Hassan Rozita, Rahman Roselinda Abdul, Yusof Asilah, Narmada Ida Bagus, Ahmad Wan Muhamad Amir W
Orthodontic Unit, School of Dental Sciences, Universiti Sains Malaysia, Kubang Kerian, Malaysia.
Department of Oral and Maxillofacial Surgery, School of Dental Sciences, Universiti Sains Malaysia, Kubang Kerian, Malaysia.
Eur J Dent. 2021 Jul;15(3):523-532. doi: 10.1055/s-0040-1722483. Epub 2021 Feb 23.
The purpose of this study was to evaluate the short-term effect of active skeletonized sutural distractor (ASSD) appliance on temporomandibular joint morphology of class III malocclusion subjects.
This was a prospective interventional study. Cone-beam computerized tomography (CBCT) images of 22 patients were taken before and after treatment by using Planmeca Promax 3D CBCT machine version 2.9.2 (Planmeca OY Helsinki, Finland). The condylar width, height, length, roof of glenoid fossa thickness, and all joint spaces were measured. The condylar position was determined based on Pullinger and Hollander formula. The condylar shape was determined as per Kinzinger et al. The condylar volume was calculated by using Mimics software (Materialize, Belgium).
Data analysis was performed by using SPSS software version 24. Wilcoxon paired signed-rank test was used to compare the difference in temporomandibular joint morphology and condylar volume between pre- and post-treatment measurements. Chi-square test was used to compare the condylar position and shape.
The superior ( = 0.000 on the right side, = 0.005 on the left side) and posterior joint spaces ( = 0.000 on both sides) were decreased after the treatment, respectively. The condyles were rotated upward and backward, thereby increasing the anterior joint spaces ( = 0.000 on both sides) after the treatment. The condylar volume increases after treatment, but no significant differences were observed ( = 0.903 on the right side, = 0.062 on the left side).
The significant changes were observed in joint spaces. The condyles were more anteriorly placed before treatment. Condylar position and shape alter in response to ASSD treatment. The condylar volume did not show any significant change.
本研究旨在评估主动式骨骼化缝牵引器（ASSD）矫治器对Ⅲ类错牙合患者颞下颌关节形态的短期影响。
这是一项前瞻性干预研究。使用Planmeca Promax 3D CBCT 2.9.2版本（芬兰赫尔辛基Planmeca OY公司）对22例患者在治疗前后进行锥形束计算机断层扫描（CBCT）成像。测量髁突的宽度、高度、长度、关节窝顶厚度以及所有关节间隙。根据Pullinger和Hollander公式确定髁突位置。按照Kinzinger等人的方法确定髁突形状。使用Mimics软件（比利时Materialize公司）计算髁突体积。
使用SPSS 24软件进行数据分析。采用Wilcoxon配对符号秩检验比较治疗前后颞下颌关节形态和髁突体积的差异。采用卡方检验比较髁突位置和形状。
治疗后，上关节间隙（右侧P = 0.000，左侧P = 0.005）和后关节间隙（双侧P = 0.000）分别减小。髁突向上向后旋转，从而使治疗后前关节间隙增大（双侧P = 0.000）。治疗后髁突体积增加，但未观察到显著差异（右侧P = 0.903，左侧P = 0.062）。
观察到关节间隙有显著变化。治疗前髁突位置更靠前。ASSD治疗后髁突位置和形状发生改变。髁突体积未显示任何显著变化。
