Matzon Jonas L, Widmer Benjamin J, Draganich Louis F, Mass Daniel P, Phillips Craig S
Department of Orthopaedic Surgery, Hospital of the University of Pennsylvania, Philadelphia, USA.
J Hand Surg Am. 2006 Oct;31(8):1272-8. doi: 10.1016/j.jhsa.2006.05.010.
Coronoid injuries are classified according to the size of the coronoid fracture. The purpose of this study was to provide a detailed anatomic description of the coronoid process, with specific focus on the coronoid height, the coronoid width, and the olecranon-coronoid angle.
Thirty-five cadaveric arms were dissected. All soft tissue was removed and the ulna was disarticulated from the humerus, radius, and the carpal bones. A 3-dimensional digitizing system was used to locate 19 anatomic landmarks on each specimen. By using the 3-dimensional coordinates of the landmarks, the coronoid heights, proximal ulnar widths, and olecranon-coronoid angles were determined.
The coronoid height, with its base defined by the trough of the trochlear notch and the slope change of the distal coronoid process, measured 15 mm and was 42% of the ulnar height. The coronoid height, with its base defined by the transverse groove of the sigmoid notch at the guiding ridge and the distal insertion of the brachialis muscle, measured 15 mm and was 43% of the ulnar height. The olecranon-coronoid angle ranged between 33 degrees and 38 degrees .
For lateral radiographic classification of coronoid fractures, coronoid height is best defined by the trough of the trochlear notch and the slope change of the distal coronoid process. For anatomic studies, coronoid height is best defined by the transverse groove of the sigmoid notch at the guiding ridge and the distal insertion of the brachialis muscle. The olecranon-coronoid angle is best defined by the angle formed by the lines from the olecranon tip through the coronoid tip and through the slope change of the distal coronoid process. The coronoid anatomy measurements reported in this study may help to improve coronoid fracture classification.
冠突损伤根据冠突骨折的大小进行分类。本研究的目的是提供冠突的详细解剖描述，特别关注冠突高度、冠突宽度和鹰嘴-冠突角。
解剖35例尸体手臂。去除所有软组织，将尺骨与肱骨、桡骨和腕骨分离。使用三维数字化系统在每个标本上定位19个解剖标志点。通过使用这些标志点的三维坐标，确定冠突高度、尺骨近端宽度和鹰嘴-冠突角。
冠突高度，以滑车切迹的沟和冠突远端的斜率变化为基础定义，测量为15mm，占尺骨高度的42%。冠突高度，以乙状切迹在引导嵴处的横向沟和肱肌的远端附着为基础定义，测量为15mm，占尺骨高度的43%。鹰嘴-冠突角在33度至38度之间。
对于冠突骨折的侧位X线分类，冠突高度最好以滑车切迹的沟和冠突远端的斜率变化来定义。对于解剖学研究，冠突高度最好以乙状切迹在引导嵴处的横向沟和肱肌的远端附着来定义。鹰嘴-冠突角最好以从鹰嘴尖通过冠突尖并通过冠突远端斜率变化的线所形成的角度来定义。本研究报告的冠突解剖测量结果可能有助于改进冠突骨折的分类。
