Lehtinen Janne T, Tingart Markus J, Apreleva Maria, Ticker Jonathan B, Warner Jon J P
Harvard Shoulder Service, Department of Orthopedics, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts, USA.
Arthroscopy. 2004 Feb;20(2):175-8. doi: 10.1016/j.arthro.2003.11.029.
The purpose of this study was to investigate normal bony anatomy of the glenoid rim and to define the angles for successful anchor placement for anterior and posterior labral repairs.
An anatomic study using cadaveric shoulder specimens.
Soft tissue was dissected from 20 cadaveric shoulders, and the glenoids were isolated. The glenoid specimens were scanned to obtain cross-sectional images using peripheral quantitative computed tomography (pQCT) in 4 different planes. Glenoid rim angles were measured from the cross-sectional pQCT images of the glenoids at 5 positions: the 3-o'clock, 4:30-, 6-, 7:30-, and 9-o'clock positions. Glenoid morphology was noted for each position.
The glenoid rim angles from the 3-o'clock to the 9-o'clock positions were 53 degrees +/- 5 degrees, 45 degrees +/- 7 degrees, 80 degrees +/- 10 degrees, 61 degrees +/- 10 degrees, 49 degrees +/- 4 degrees, respectively. Asymmetric morphology of the glenoid was noted with an almost straight line extending medially from the rim at the 3-o'clock position, whereas a concave morphology was noted at the 9-o'clock position. Similarly at the 4:30-o'clock position, the scapular bony surface did not curve toward the base as markedly as it did at the corresponding posterior 7:30-o'clock position.
The available bone mass for the anchor insertion was found to vary depending on the position of the glenoid rim. Both rim angle and glenoid morphology for each position must be considered when selecting the ideal anchor insertion angle for labral repair.
本研究旨在探究肩胛盂边缘的正常骨解剖结构，并确定用于前后盂唇修复的成功锚钉置入角度。
一项使用尸体肩部标本的解剖学研究。
从20具尸体肩部解剖软组织，分离出肩胛盂。使用外周定量计算机断层扫描（pQCT）在4个不同平面扫描肩胛盂标本以获取横断面图像。从肩胛盂横断面pQCT图像上的5个位置测量肩胛盂边缘角度：3点、4:30、6点、7:30和9点位置。记录每个位置的肩胛盂形态。
从3点到9点位置的肩胛盂边缘角度分别为53度±5度、45度±7度、80度±10度、61度±10度、49度±4度。注意到肩胛盂形态不对称，在3点位置从边缘向内侧延伸几乎呈一条直线，而在9点位置为凹形。同样，在4:30位置，肩胛骨关节面不像在相应的后7:30位置那样明显地向底部弯曲。
发现可用于锚钉插入的骨量因肩胛盂边缘位置而异。在选择盂唇修复的理想锚钉插入角度时，必须考虑每个位置的边缘角度和肩胛盂形态。
