The purpose of this study was to analyze the factors of a poor outcome after shoulder surgery. Eleven patients (15 shoulders) were evaluated, who got a poor outcome after shoulder surgery. The cases included 1 male and 10 female. The mean age to get shoulder discomfort was 18.1 (ranged, 10-32) years old. The shoulders included 11 loose shoulders, 2 rotator interval lesions, 1 recurrent dislocation of the shoulder and 1 acromioclavicular dislocation. They all had shoulder instabilities. The causes of shoulder discomfort were unknown in 8 shoulders and injuries in 7 shoulders. Eleven glenoid osteotomies, seven N-H method (modified Putti-Platt procedure), four rotator interval repairs, and 1 Dewar method were performed. In 10 shoulders after surgery the scapulo-humeral rhythm was bad, in 9 severe pain continued, in 8 instability remained, and in 8 the range of motion of the shoulders was bad. All the patients had psychiatric problems. In our study the factors of a poor outcome after shoulder surgery was shoulder instability, which was based on psychoneurosis.
