Wals-Siezenheim Orofacial Pain and Temporomandibular Disorders Unit, Department of Oral and Maxillofacial Surgery, Center of Dentistry and Oral Surgery, Innsbruck Medical University, Innsbruck, Austria.
J Oral Rehabil. 2012 Feb;39(2):93-9. doi: 10.1111/j.1365-2842.2011.02251.x. Epub 2011 Sep 19.
To assess whether in patients with temporomandibular joint (TMJ) arthralgia cephalometric variables of mandibular morphology may discriminate among the magnetic resonance (MR) imaging-based TMJ groups of 'bilateral presence of disk displacement without reduction (DDwoR) and osteoarthrosis (OA)' and 'bilateral absence of bilateral DDwoR and OA'. Bilateral MR imaging of the TMJ was performed in 45 consecutive TMJ arthralgia patients to identify individuals with the specific structural characteristics of bilateral TMJ DDwoR associated with OA. Linear and angular cephalometric measurements were taken from lateral cephalograms to apply selected criteria of mandibular morphology. A discriminant function analysis was used to investigate how cephalometric parameters discriminate among the TMJ groups of 'bilateral presence of DDwoR with OA' and 'bilateral absence of DDwoR and OA'. Ramus height (Ar-Go) and effective mandibular length (Ar-Pog) produced a significant discriminant function that predicted TMJ group membership (P < 0·001). This function correctly classified 80·2% of original and cross-validated grouped cases. This study supports the concept that cephalometric variables of mandibular morphology discriminate among subjects with and without bilateral TMJ DDwoR and OA.
为了评估颞下颌关节（TMJ）关节炎患者的下颌形态的头影测量变量是否可以区分基于磁共振成像（MRI）的 TMJ 组的“双侧存在不可复位的盘移位和骨关节炎（DDwoR 和 OA）”和“双侧不存在 DDwoR 和 OA”。对 45 例连续的 TMJ 关节炎患者进行双侧 TMJ MRI 检查，以确定具有与 OA 相关的双侧 TMJ DDwoR 特定结构特征的个体。从侧位头颅侧位片上测量线性和角度头影测量值，以应用下颌形态的选定标准。使用判别函数分析来研究头影测量参数如何区分“双侧存在 DDwoR 和 OA”和“双侧不存在 DDwoR 和 OA”的 TMJ 组。髁突高度（Ar-Go）和有效下颌长度（Ar-Pog）产生了一个显著的判别函数，可以预测 TMJ 组别的归属（P<0·001）。该函数正确分类了 80·2%的原始和交叉验证分组病例。本研究支持这样的概念，即下颌形态的头影测量变量可以区分双侧 TMJ DDwoR 和 OA 患者和无 TMJ DDwoR 和 OA 患者。
