Department of Orthopaedic Surgery, The University of Texas Southwestern Medical Center, Dallas, Texas 75390-8883, USA.
Arthroscopy. 2012 Jul;28(7):1030-5. doi: 10.1016/j.arthro.2012.04.147.
In patients with anterior glenohumeral instability, the most commonly observed osseous defect involves the anterior portion of the inferior glenoid. The amount of glenoid bone loss guides surgical treatment, with progressively larger defects not being amenable to arthroscopic soft-tissue procedures. Currently, there is no universally accepted method of quantifying glenoid bone loss. Two-dimensional area-based methods and 1-dimensional methods of measuring bone loss have both been described but cannot be used interchangeably. The surface area of a glenoid bony defect is a more comprehensive descriptor of its magnitude than the 1-dimensional width of the defect. Calculating surface area can be challenging. We describe a method of quantifying glenoid bone loss using a glenoid arc angle that corresponds to the surface area of the defect. The arc angle is easily measured by use of commonly used imaging software tools and is independent of the size of the glenoid or defect orientation. This method may prove valuable in preoperative planning for patients with anterior glenohumeral instability.
在肩盂前向不稳定的患者中，最常观察到的骨缺损涉及肩胛盂下部的前份。肩胛盂骨缺损的程度指导手术治疗，随着缺损逐渐增大，关节镜下软组织手术不再适用。目前，尚无普遍接受的定量评估肩胛盂骨缺损的方法。二维基于面积的方法和一维测量骨丢失的方法都已被描述，但不能互换使用。与骨缺损的一维宽度相比，肩胛盂骨缺损的表面积是对其严重程度更全面的描述。计算表面积可能具有挑战性。我们描述了一种使用与缺陷表面积相对应的肩胛盂弧角来定量评估肩胛盂骨丢失的方法。该弧角可通过使用常用的成像软件工具轻松测量，并且与肩胛盂或缺陷方向的大小无关。这种方法可能在前肩盂前向不稳定患者的术前规划中具有重要价值。
