Badet R, Boulahia A, Walch G
Clinique Emilie de Vialar, Lyon.
Rev Chir Orthop Reparatrice Appar Mot. 1998 Oct;84(6):508-14.
The authors proposed a CT method to measure the humeral head subluxation in sagittal plane. They used this method to analysed the sagittal position of the humeral head, in primary gleno humeral osteoarthritis without humeral head elevation.
The control group was composed of 50 shoulder computed tomography in small rotator cuff tear confined to the supraspinatus muscle (Bernageau stade I on the arthrography). We evalued computer tomographic findings in 104 cases of primary gleno humeral osteoarthritis without humeral head elevation. The results were expressed in rate of subluxation.
This method can be used to measure sagittal subluxation of the humeral head in scapulo humeral pathology. In 35 per cent of cases, gleno humeral osteoarthritis without humeral head elevation, the posterior subluxation (rate of subluxation > 55 per cent) can explain the arthritic evolution. If total shoulder arthroplasty is performed, persistent posterior subluxation may result in premature posterior wear of the glenoïd component, or, in premature loosening of the glenoïd component.
The method used for sagittal subluxation of the humeral head measurement is precise. This study, emphasizes the pronostic interest and the therapeutic consequences of this measurement in gleno humeral osteoarthritis without humeral head elevation.
作者提出一种CT方法来测量矢状面肱骨头半脱位情况。他们运用此方法分析了原发性盂肱关节骨关节炎且肱骨头无抬高时肱骨头的矢状位情况。
对照组由50例局限于冈上肌的小肩袖撕裂的肩部计算机断层扫描（关节造影为Bernageau I期）组成。我们评估了104例原发性盂肱关节骨关节炎且肱骨头无抬高患者的计算机断层扫描结果。结果以半脱位率表示。
该方法可用于测量肩胛盂肱关节病变中肱骨头的矢状面半脱位情况。在35%的原发性盂肱关节骨关节炎且肱骨头无抬高的病例中，后脱位（半脱位率>55%）可解释关节炎的进展。如果进行全肩关节置换术，持续的后脱位可能导致肩胛盂部件过早出现后侧磨损，或者导致肩胛盂部件过早松动。
用于测量肱骨头矢状面半脱位的方法是精确的。本研究强调了这种测量在原发性盂肱关节骨关节炎且肱骨头无抬高情况下的预后意义及治疗后果。
