[在使用Herbst矫治器进行两阶段治疗期间颞下颌关节骨结构的锥形束计算机断层扫描分析]
[Cone beam computed tomography analysis of the bony structure of the temporomandibular joint during two phase treatment with Herbst appliance].
作者信息
Weiwei Chen, Ting Sang, Zhen Huang, Jun Wu
机构信息
Dept. of Stomatology, Traditional Chinese Medicine and Western Medicine Combination Hospital of Nanchang City, Nanchang 330006, China.
Dept. of Orthodontics, The Affiliated Stomatological Hospital of Nanchang University, Nanchang 330006, China.
出版信息
Hua Xi Kou Qiang Yi Xue Za Zhi. 2016 Oct 1;34(5):498-501. doi: 10.7518/hxkq.2016.05.013.
OBJECTIVE
This study assessed the effects of two-phase treatment with Herbst appliance on the bony structure of the temporomandibular joint via cone beam computed tomography (CBCT) analysis.
METHODS
This study selected 15 patients exhibiting early permanent dentition and classⅡmalocclusion combined with mandibular retrusion treated by a two phase treatment (Herbst and fixed appliance). The CBCT scans of the patients were obtained at the following stages: 2 weeks before Herbst treatment (T1), at the start of treatment when the Herbst appliance was set in place (T2), immediately after removal of the Herbst appliance (T3), and immediately after removal of the edgewise appliance (T4). Three-dimensional reconstruction and related measurements were performed using InvivoDental software, and the acquired data were statistically analyzed.
RESULTS
- CBCT showed a crescent-shaped hyperplasia at the posterior-superior border of the condyles that the outer edge was highly dense and the inner region was lowly dense in T3 in 14 patients (28 condyles). 2) In T3-T2 and T4-T1, the diameters of the anteroposterior condyles increased by 0.62 and 0.66 mm, respectively (P<0.01), and the condylar head height correspondingly increased by 0.54 and 0.53 mm (P<0.01).
CONCLUSIONS: Condylar growth remodeling occurs during Herbst treatment. .
目的
本研究通过锥形束计算机断层扫描（CBCT）分析评估Herbst矫治器两期治疗对颞下颌关节骨结构的影响。
方法
本研究选取15例恒牙早期且安氏Ⅱ类错合伴下颌后缩的患者，采用两期治疗（Herbst矫治器和固定矫治器）。在以下阶段获取患者的CBCT扫描图像：Herbst治疗前2周（T1）、Herbst矫治器就位开始治疗时（T2）、Herbst矫治器拆除后即刻（T3）、方丝弓矫治器拆除后即刻（T4）。使用InvivoDental软件进行三维重建和相关测量，并对获取的数据进行统计学分析。
结果
1）CBCT显示，14例患者（28个髁突）在T3时髁突后上缘出现新月形增生，外缘高密度，内部区域低密度。2）在T3 - T2和T4 - T1阶段，髁突前后径分别增加0.62和0.66 mm（P<0.01），髁突头部高度相应增加0.54和0.53 mm（P<0.01）。
结论
Herbst治疗期间髁突发生生长改建。
Zotero 插件