| 摘要 |
<p>The protractors are used to measure the circumferential location of points or regions relative to the anatomical neck of the humerus and the rim of the glenoid face of the scapula. The humerus compenent comprises a flat graduated ring 10 designed to pass through the hemispherical humeral head 4 to fit appropriately on the anatomical neck. The ring is divided into angled segments. The humeral component may also comprise a hemispherical cap 11 with finger grips 12. The glenoid component 8 is a pear shaped measuring piece. The rim is divided into angled segments. The glenoid component may additionally comprise a handle 9.</p> |
