Three-dimensional positions and forms of temporomandibular joints in Class Ⅱ division 1 malocclusion patients associated with different vertical skeletal patterns
10.3760/cma.j.issn.1002-0098.2014.07.004
- VernacularTitle:不同垂直骨面型安氏Ⅱ类1分类错(牙合)患者颞下颌关节三维形态结构的比较
- Author:
Bei CHE
1
;
Hao ZHANG
;
Caimei QIAN
;
Yang ZHANG
;
Lin WANG
;
Junqing MA
Author Information
1. 高邮市中医医院口腔科
- Keywords:
Malocclusion,Angle Class Ⅱ;
Temporomandibular joint;
Cone-beam computed tomography
- From:
Chinese Journal of Stomatology
2014;49(7):399-402
- CountryChina
- Language:Chinese
-
Abstract:
Objective To evaluate the positions and forms of temporomandibular joints(TMJ) with different vertical skeletal patterns in Class Ⅱ division 1 patients.Methods Cone-beam CT scans of 117 Class Ⅱ division 1 adolescent patients (including 30 patients with high angle,58 with average angle and 29 with low angle) were selected and reconstructed using Mimics 10.0 software.Fourteen measurements related to the positions and forms of condyle,forms of fossa and joint spaces were performed.Results Compared with high and average angle patients,the condyles in low angle patients located more posteriorly and inferiorly [the vertical distances between condyle and S was (20.67 ± 1.99) mm and the antero-posterior distances between condyle and S was (9.15± 1.61) mm].The joint fossae were deeper[the fosse depths was (7.83 ± 1.06) mm].The angles of posterior joint node bevels were bigger[the inclinations were (28.91 ±3.94)°].The condyles were shorter,thicker,tipped more anteriorly and positioned more posteriorly[the proportions of post-positioned condyles of low angle,average angle and high angle patients were 26％,4％,0％ respectively].Conclusions Class Ⅱ division 1 adolescents with different vertical skeletal patterns had different forms of fossae,and different positions and forms of condyles.
