THE ROLE OF GLENOID DYSPLASIA IN THE PATHOGENESIS OF RECURRENT SHOULDER INSTABILITY

The purpose - to analyze computerized tomography data in patients with recurrent shoulder instability for signs of glenoid dysplasia. Methods. We studied the diagnostic data and the results of surgical treatment of 168 patients (137 men and 31 women) mostly of young age (under 30 years) who addressed to the clinic during the period from 2010 to 2014 with the symptoms of recurrent anterior shoulder instability. A risk group has been defined with alleged glenoid dysplasia in the amount of 27 patients who were studied by glenoid dimensions (height, width, area), glenoid version (anteversion, retroversion) and inclination angle of the glenoid. Results. In 22 cases, there has been a change in the normal anatomy of the glenoid as its excessive anteversion, increased angle of inclination, and decrease of its absolute area. Research has identified a pathogenic role of changes in the normal anatomy of the glenoid because recurrence of chronic instability in some cases after surgery, as well as in cases of non-traumatic instability in patients without anatomic lesions. Conclusions. Dysplastic changes of bony structures of the shoulder represent the risk factor for recurrent instability and can serve as one of the causes of recurrence after surgical treatment. When choosing a treatment strategy in patients of modern population is advisable to suggest the possible presence of dysplastic changes glenoid. In the event of recurrence after surgical treatment is shown holding computerized tomography to rule out dysplastic changes.