| 摘要 |
The present invention features an acromial-humeral prosthesis for use in performing acromial-humeral arthoplasty. The prosthesis is useful for cases where massive, irreparable tears to the rotator cuff have occurred. The principle function of the prosthesis is to prevent superior migration of the humeral head. An acromial tray is inserted using a specialized insertion tool. The acromial tray is held in place against a prepared inferior surface of the acromion by a pair of screws. A concave, disc-like polymeric component is affixed to the bottom of the acromial tray by sliding the component onto one or more matching rails on the inferior surface of the acromial tray This component is relieved to accept the long head of the biceps tendon anteriorly and the greater trochanter laterally. The inventive prosthesis helps prevent non-anatomical articulations of the humerus and other inappropriate glenohumeral kinematics.
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