Atrophy of type I and II muscle fibers is reversible in the case of grade >2 fatty degeneration of the supraspinatus muscle: an experimental study in rabbits.

Background: Although clinical investigations indicate that the limit of reversibility of rotator cuff muscles fibers type I and II atrophy is grade 2 of fatty degeneration (FD) according to the Goutallier computed tomography classification, little is known about the morphometric verification of these findings.

Methods: The supraspinatus tendon was detached from the greater tubercle and the infraspinatus and subscapularis in 12 rabbits, and a 12-week observation period followed. This proved to be sufficient for development of grade >2 FD of the supraspinatus tendon.

The evaluation of the influence of selected patellofemoral joint geometry indicators observed in magnetic resonance imaging on the incidence of anterior knee pain in patients after anterior cruciate ligament reconstruction using hamstrings.

Background: Anterior knee pain (AKP) is a frequent serious clinical problem after anterior cruciate ligament (ACL) reconstruction, regardless of the graft material used. The author conducted prospective studies of the correlation between AKP and disturbed geometry of patello-femoral joint observed in magnetic resonance imaging (MRI), in patients with injured ACL reconstructed with the use of hamstrings.

Material And Methods: The study included 60 patients (34 males and 26 females), at the mean age of 31, who underwent ACL reconstruction with flexors.