Evaluation of temporomandibular joint space and condylar morphology in patients with anterior open-bite based on cone-beam CT
10.12016/j.issn.2096-1456.2021.07.006
- Author:
LAI Zhanwen
1
,
2
,
3
;
HU Ziyang
4
;
PAN Xiao
4
;
HAO Yanqing
4
;
LIN Zitong
4
Author Information
1. Guangxi Institute of Occupational Disease Prevention and Control &
2. Guangxi Workers&prime
3. Hospital
4. Nanjing Stomatological Hospital, Medical School of Nanjing University, Department of Dentomaxillofacial Radiology Imaging
- Publication Type:Journal Article
- Keywords:
cone-beam CT;
temporomandibular joint;
anterior space;
superior space;
posterior space;
condylar morphology;
anterior open-bite;
normal overbite;
orthodontic treatment
- From:
Journal of Prevention and Treatment for Stomatological Diseases
2021;29(7):468-473
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To investigate the difference of the temporomandibular joint between patients with anterior open-bite and normal overbite with cone beam CT (CBCT).
Methods : Fifty-four patients with anterior open bites and 54 patients with normal overbites were selected from the Department of Orthodontics, Nanjing Stomatological Hospital, Medical School of Nanjing University from June 2014 to August 2020. Sagittal and coronal images of the temporomandibular joint were reconstructed with multiplanar reconstruction techique. The Kamelchuk method was used to measure the superior, posterior and anterior space of the temporomandibular joint, and the condylar morphology was divided into two types: normal and abnormal. The joint space and condylar morphology of the anterior open-bite group and the normal overbite group were statistically analyzed. The anterior open-bite group was divided into 3 subgroups: ① Ⅰ° open-bite (open bite distance < 3 mm), ② Ⅱ° open-bite (open bite distance ≥ 3 mm and ≤ 5 mm) and ③ Ⅲ° open-bite (open bite distance > 5 mm). The difference of overbite spaces of the temporomandibular joint was compared among these three subgroups.
Results:Compared to the normal group, no significant differences were found for the anterior and superior space of the temporomandibular joint in the anterior open-bite group (P > 0.05), but the posterior space increased significantly (P < 0.01). A total of 52.8% of patients in the anterior open-bite group had abnormal condyles, whereas 21.3% of patients in the normal group, overbite significant differences was found between the two groups (P < 0.01). Compared with patients with Ⅰ° and Ⅱ° openbite, the condyle of patients with III° open bites was more forward in the fossa (P < 0.05).
Conclusion :The position of the condyle in the fossa of patients with anterior open bites is more forward, and abnormal condylar bone is more common found.
- Full text:前牙开牙合患者颞下颌关节间隙及髁突形态的锥形束CT评价.pdf
