Mandible condyle fracture has been reported to constitute 9–45 % (Asprino and Consani, 2006), 14.1 % (Bataineh, 1998), 25–50 % (Silvennoinen, Iizuka, 1992), 32 % (Chrcanovic et al., 2004), and 38 % (Brasileiro and Passeri, 2006) of all mandible fractures (Kozakiewicz and Swiniarski, 2013). Small bone segments, limited available space for application of the fixation material and limited visibility of the operative field are common difficulties. To guarantee satisfactory treatment effects, anatomical reduction and proper fracture stability are necessary. The use of 3–4 screws in the upper section (proximal segment) provides adequate immobilization, which can be easily achieved when the condyle is low and wide. However, if the condyle is slender, it is not technically possible to fix 2 plates and 4 screws for osteosynthesis. Selection of the appropriate fixative material that will provide adequate rigidity during the healing period while simultaneously allowing proper construction of the lateral silhouette of the processus condylaris mandibulae to fix the plate remains a key consideration.

The aim of this study was to evaluate clinico-anatomical classification of the condyle of mandible posture for traumatological purposes. Five hundred computer tomography virtual models were created, from which 11 measurements were made, and 2 indexes were calculated. Assessment of types based on the ratio of the condyle height index revealed a dichotomous division into high and short condyles. Statistically associated with the division, the Width_neck_basal (the width of the bone at the level of semilunar notch measured by a frontal projection perpendicular to line “A”, as described by Neff (Neff et al., 2014)) measurement allowed the creation of the following clinico-anatomical classification: -slender-type condyles have a Width_neck_basal in the range of 4–8.5 mm; -squad-type condyles have a Width_neck_basal in the range of 11.5–19.5 mm.

Patients with a Width_neck_basal value in the 8.5–11.5 mm range cannot be classified using this method, and a different method to assess the lateral condylar silhouette must be used. The proposed clinic-anatomical classification method avoids the problems associated with incorrect osteosynthesis plate selection. Assignment to a group can be obtained by making one measurement (the Width_neck_basal). In that way, the optimal fixing material can be selected by the surgeon before the operation commences, with great intraoperation time savings.

据报道，下颌骨髁骨折占 9–45% (Asprino and Consani, 2006)、14.1% (Bataineh, 1998)、25–50% (Silvennoinen, Iizuka, 1992)、32% (Chrcanovic et al., 2004)和 38%（Brasileiro 和 Passeri，2006 年）的所有下颌骨骨折（Kozakiewicz 和 Swiniarski，2013 年）。小骨段、固定材料的可用空间有限以及手术区域的可见性有限是常见的困难。为了保证满意的治疗效果，解剖复位和适当的骨折稳定性是必要的。在上部（近端节段）使用 3-4 颗螺钉可提供足够的固定，当髁低且宽时可以轻松实现。但是，如果髁突细长，在技术上无法固定2块钢板和4颗螺钉进行接骨术。

本研究的目的是评估用于创伤学目的的下颌骨姿势髁的临床解剖学分类。创建计算机断层扫描虚拟模型 500 次，进行 11 次测量，计算 2 项指标。基于髁突高度指数比率的类型评估揭示了高髁和短髁的二分法。在统计上与分割相关，Width_neck_basal（半月槽水平的骨骼宽度，由垂直于线“A”的正面投影测量，如 Neff（Neff 等人，2014 年）所述）测量允许创建以下临床解剖分类： - 细长型髁的 Width_neck_basal 范围在 4-8.5 毫米之间；-squad 型髁的 Width_neck_basal 范围在 11.5-19.5 毫米之间。

Width_neck_basal 值在 8.5-11.5 毫米范围内的患者不能使用这种方法分类，必须使用不同的方法来评估外侧髁轮廓。所提出的临床解剖分类方法避免了与不正确的接骨板选择相关的问题。通过进行一次测量（Width_neck_basal）可以获得对组的分配。这样，外科医生可以在手术开始前选择最佳的固定材料，大大节省了术中时间。