Background: We herein describe a surgical technique for the repair of complete tear of the pectoralis major (PM)\r\ntendon using endobuttons to strengthen initial fixation.\r\nMethods: Five male patients (3 judo players, 1 martial arts player, and 1 body builder) were treated within 2 weeks\r\nof sustaining complete tear of the PM tendon. Average age at surgery and follow-up period were 28.4 years\r\n(range, 23-33) and 28.8 months (range, 24-36). A rectangular bone trough (about 1 Ã?â?? 4 cm) was created on the\r\nhumerus at the insertion of the distal PM tendon. The tendon stump was introduced into this trough, and fixed to\r\nthe reverse side of the humeral cortex using endobuttons and non-absorbable suture. Clinical assessment of re-tear\r\nwas examined by MRI. Shoulder range of motion (ROM), outcome of treatment, and isometric power were\r\nmeasured at final follow-up.\r\nResults: There were no clinical re-tears, and MRI findings also showed continuity of the PM tendon in all cases at\r\nfinal follow-up. Average ROM did not differ significantly between the affected and unaffected shoulders. The\r\nclinical outcomes at final follow-up were excellent (4/5 cases) or good (1/5). In addition, postoperative isometric\r\npower in horizontal flexion of the affected shoulder showed complete recovery when compared with the\r\nunaffected side.\r\nConclusions: Satisfactory outcomes could be obtained when surgery using the endobutton technique was\r\nperformed within 2 weeks after complete tear of the PM tendon. Therefore, our new technique appears promising\r\nas a useful method to treat complete tear of the PM tendon.
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