Kim Jung-Han, Min Young-Kyoung
Department of Orthopedic Surgery, Inje University Busan Paik Hospital, Inje University College of Medicine, Busan, Korea.
Clin Shoulder Elb. 2018 Sep 1;21(3):113-119. doi: 10.5397/cise.2018.21.3.113. eCollection 2018 Sep.
This study was undertaken to evaluate the positional relationship between planes of the glenoid component (the scapular plane and the perpendicular plane to the glenoid) and its surrounding structures.
Computed tomography (CT) images of both shoulders of 100 patients were evaluated using the 3-dimensional CT reconstruction program (Aquarius; TeraRecon). We determined the most lateral scapular bony structure of the scapular plane and measured the shortest distance between the anterolateral corner of the acromion and the scapular plane. The distance between the scapular plane and the midpoint of the line connecting the posterolateral corner of acromion and the anterior tip of the coracoid process (fulcrum axis) was also evaluated. The perpendicular plane was then adjusted to the glenoid and the same values were re-assessed.
The acromion was the most lateral scapular structure of scapular plane and perpendicular plane to the glenoid. The average distance from the anterolateral corner of the acromion to the scapular plane was 10.44 ± 5.11 mm, and to the plane perpendicular to the glenoid was 9.55 ± 5.13 mm. The midpoint of fulcrum axis was positioned towards the acromion and was measured at 3.90 ± 3.21 mm from the scapular plane and at 3.84 ± 3.17 mm from the perpendicular plane to the glenoid.
Our data indicates that the relationship between the perpendicular plane to the glenoid plane and its surrounding structures is reliable and can be used as guidelines during glenoid component insertion (level of evidence: Level IV, case series, treatment study).
本研究旨在评估肩胛盂假体平面（肩胛平面和肩胛盂垂直平面）与其周围结构之间的位置关系。
使用三维CT重建程序（Aquarius；TeraRecon）对100例患者双肩的计算机断层扫描（CT）图像进行评估。我们确定了肩胛平面最外侧的肩胛骨性结构，并测量了肩峰前外侧角与肩胛平面之间的最短距离。还评估了肩胛平面与连接肩峰后外侧角和喙突前端（支点轴）的直线中点之间的距离。然后将垂直平面调整至肩胛盂，并重新评估相同的值。
肩峰是肩胛平面和肩胛盂垂直平面中最外侧的肩胛结构。肩峰前外侧角到肩胛平面的平均距离为10.44±5.11mm，到肩胛盂垂直平面的平均距离为9.55±5.13mm。支点轴中点朝向肩峰，距肩胛平面测量值为3.90±3.21mm，距肩胛盂垂直平面测量值为3.84±3.17mm。
我们的数据表明，肩胛盂平面垂直平面与其周围结构之间的关系是可靠的，可作为肩胛盂假体植入过程中的指导（证据级别：IV级，病例系列，治疗研究）。
