The effectiveness of current methods of surgical treatment of anterior recurrent instability of the shoulder joint, depending on anatomical and functional changes

Abstract

Introduction Traumatic anterior dislocation of the shoulder usually results in chronic recurrent shoulder instability, especially in young adults. To reduce the rate of recurrent dislocations, various options of osteoplastic operations have been proposed. The purpose of our study is to determine the significance of anatomical and functional disorders in patients with anterior shoulder joint instability; to evaluate the results of the methods for surgical treatment of patients with anterior recurrent instability of the shoulder joint, depending on the anatomical and functional disorders. Materials and methods The results of diagnostic examination and treatment of 169 patients with recurrent post-traumatic dislocation of the shoulder who were operated on at the Federal State Budgetary Organization “Federal Center for Traumatology, Orthopedics and Arthroplasty” (Cheboksary) were analyzed. The average age of patients was 31.1 ± 13.1 years; the average period of postoperative follow-up was 49.5 ± 24.0 months. Clinical data were assessed by angulometry, using the ROWE, ASES, UCLA, VAS scales. The size of bone defects was determined using radiological methods. 99 patients (58.6 %) underwent arthroscopic Bankart repair, 24 patients (14.2 %) with more than 15 % anterior glenoid bone defect underwent Latarjet operation. Bankart + Remplissage surgery was performed in 39 patients (23.1 %), Latarjet + Remplissage in 7 (4.1 %) patients. Results Bone defect of the glenoid of more than 15 % of the area was detected in 32 patients. Hill-Sachs grade 3 injury was reported in 24 patients. Most of these patients had a history of more than 20 dislocation episodes. Hyperelasticity of the shoulder joint was found in 34 patients. In the postoperative period, there was a slight improvement in the mean indicators of flexion and abduction in the shoulder joint from 174.2 ± 15.9° and 170.6 ± 17.8° to 175.6 ± 9.3° and 173.0 ± 12.3°, respectively. The mean external rotation worsened from 61.6 ± 25.7° to 55.9 ± 14.4°. Indicators of the ROWE, ASES, UCLA rating scales improved significantly from 38.5 ± 8.5, 76.0 ± 13.2 and 20.8 ± 3.0 to 89.9 ± 17.5, 94.0 ± 7.1 and 32.7 ± 3.7 points, respectively. Poor results were observed in 7 patients (4.1 %), of which three had a relapse. Conclusions Critically significant anatomical and functional disorders in patients with anterior instability of the shoulder joint are the defect of the anterior rim of the articular process of the scapula more than 15 %, the defect of the posterior surface of the humeral head (Hill-Sachs defect) of grade 3, hyperelasticity of the soft tissues of the shoulder joint. The severity of bone defects is directly proportional to the total number of dislocations. The effectiveness of surgical techniques for stabilizing the shoulder joint, depending on the above anatomical and functional disorders, was 95.9 %.

Keywords

• shoulder joint
• habitual shoulder dislocation
• recurrent instability
• bankart repair
• latarjet operation
• remplissage