Typical patterns of malalignment in the degenerative acromioclavicular joint

Abstract Introduction Although arthroscopic acromioclavicular (AC) joint resection is a frequently performed procedure, the pathophysiology of non-traumatic AC degeneration still unclear. The purpose this study was to investigate whether shows typical pattern and it starts at posterior part with malalignment articular surfaces. Materials methods In retrospective monocentric diagnostic study, healthy affected subjects were investigated using T2 magnet resonance imaging (MRI) scans in transverse plane. Group 1 included 30 asymptomatic adults no history trauma (mean age, 38.6 years). group 2, 90 patients symptomatic joints who underwent 60.0 All relevant pathologies that affect excluded. Malalignment defined as space smaller than 2 mm conjunction an angle lower 12°. Results measured values mm; mean p -value): anterior (6.07; 5.63; 0.50), central (2.97; 2.09; 0.001), (3.97; 2.38; 0,001), (7.63; 19.2; 0.001). 1, n = 24 (80%) showed aligned joints, whereas only 11 (12.2%) ( < Increasing age correlated significantly (r 0.21, 0.021). Conclusions Patients degenerative changes show opening early contact surfaces contrast subjects. influences effect.