THE RESULTS OF OPERATIVE RESECTION OF THE LATERAL END OF THE CLAVICLE

Seventy-three patients had operative resection of the lateral end of t he clavicle for the treatment of a painful condition of the acromiocla vicular joint. Thirty-two of the patients had had a traumatic separati on of the acromioclavicular joint, eight had had a fracture of the lat eral end of the clavicle, and thirty-three had primary acromioclavicul ar osteoarthrosis. An average of sixteen millimeters (range, five to t hirty-seven millimeters) was resected; the amount was similar in each of the three groups. The patients were evaluated an average of nine ye ars (range, four to sixteen years) after the operation. The result was considered good in twenty-one patients, satisfactory in twenty-nine, and poor in twenty-three. A poor result was more common in the patient s who had had a fracture of the lateral end of the clavicle (p < 0.01) , Forty-six patients reported pain with exertion, and thirteen noted p ain at rest. Eighteen patients had a decrease in the strength of the i nvolved upper extremity and sixteen had some limitation of the mobilit y of the shoulder. Elevation of the lateral end of the remaining part of the clavicle as compared with the scapula was noted in eighteen pat ients and was more likely to be associated with pain (p < 0.05). The e xtent of the resection was significantly associated with pain; patient s who had had a smaller amount of resection (ten millimeters or less) had less pain than those who had had a larger amount (p < 0.03). A goo d result was more common in the patients in whom less than ten millime ters had been resected and who had had a previous traumatic separation of the acromioclavicular joint or had primary acromioclavicular osteo arthrosis. We recommend that resection of the lateral end of the clavi cle be considered with caution for patients who have severe post-traum atic or degenerative osteoarthrosis of the acromioclavicular joint. If resection is performed, it should not exceed ten millimeters.