Paknahad Maryam, Shahidi Shoaleh
Oral and dental disease research center, oral and maxillofacial radiology department, dental school, Shiraz university of medical sciences, Shiraz, Iran.
Biomaterials research center, oral and maxillofacial radiology department, dental school, Shiraz university of medical sciences, Shiraz, Iran.
Int Orthod. 2017 Dec;15(4):740-751. doi: 10.1016/j.ortho.2017.09.007. Epub 2017 Oct 28.
Condylar position may play an important role in the establishment of different craniofacial morphologies. The aim of the present study was to determine the possible association between condylar position and vertical skeletal craniofacial morphology in subjects with normal sagittal skeletal pattern using CBCT.
The CBCT images of 45 patients with Class I sagittal skeletal pattern were classified into three balanced groups on the basis of SN-MP angle. Each group contained 15 subjects: low angle, normal angle and high angle. The condylar position was determined for the left and right joints. Chi square test was applied to assess the association between condylar position and vertical skeletal growth pattern.
The condyles were more anteriorly-positioned in patients with high angle vertical pattern than in those with normal and low angle vertical pattern. No significant differences were found in condylar position between low angle and normal angle subjects.
A significant correlation between condylar position and vertical skeletal pattern was found in the present study. This relationship can be considered for predicting and establishing a proper treatment plan for temporomandibular diseases during orthodontic treatment.
髁突位置可能在不同颅面形态的形成中起重要作用。本研究的目的是使用锥形束计算机断层扫描（CBCT）确定矢状骨面型正常的受试者中髁突位置与垂直向骨骼颅面形态之间的可能关联。
根据SN-MP角将45例I类矢状骨面型患者的CBCT图像分为三个均衡组。每组包含15名受试者：低角组、正常角组和高角组。确定左右关节的髁突位置。应用卡方检验评估髁突位置与垂直向骨骼生长型之间的关联。
高角垂直型患者的髁突位置比正常角和低角垂直型患者的髁突位置更靠前。低角组和正常角组受试者的髁突位置未发现显著差异。
本研究发现髁突位置与垂直向骨骼型之间存在显著相关性。在正畸治疗期间，这种关系可用于预测和制定颞下颌疾病的适当治疗计划。
