Quantitative assessment of thinning of the subscapularis tendon in recurrent anterior dislocation of the shoulder by use of magnetic resonance imaging

Long-term subscapularis strength assessment after Bristow-Latarjet procedure: isometric study

“…In a shoulder with multiple dislocations, subscapularis musculotendinous unit is lengthened and thinned as result of the healing of the posttraumatic lesions, 27 even if in elderly patients the most common findings after multiple dislocations are the posterior-superior rotator cuff tears. 21 Repetitive micro-trauma and stretching, due to the recurrent instability, induce thinning and decrease of the cross-sectional area of the subscapularis tendon 29 with interstitial fibrosis of the muscle and modifications in the ratio of fiber types. 7 The innervation of the subscapularis muscle is at risk during the mobilization technique performed in the surgical approach, 2,11 because the penetrating subscapularis nerve branches are closest to the anterior border of the glenoid when the arm is changed from the internal to the external rotation.…”

Integridade do músculo subescapular após a cirurgia aberta para tratamento da luxação recidivante glenoumeral: avaliação clínica e radiológica

“…A diferença encontrada foi de 19%, resultado semelhante ao obtido nos estudos de Tuoheti et al (17) (18,7%). Na avaliação da área da seção transversal do subescapular também foi observada diminuição significativa no ombro operado, com um déficit de 23%.…”

“…Na avaliação da área da seção transversal do subescapular também foi observada diminuição significativa no ombro operado, com um déficit de 23%. Tuoheti et al (17) encontraram em seu estudo um déficit de 29%. A avaliação da degeneração gordurosa mostrou que a maioria dos pacientes apresentou bons resultados e somente nos com lado operado não dominante foi observada degeneração nos graus 2 e 3.…”

Subscapularis dysfunction following anterior surgical approaches to the shoulder

“…53 It is believed that the SSC musculotendinous unit is lengthened and thinned in shoulders with recurrent anterior dislocations. 8,10,53,58 Tuoheti et al have shown that the SSC tendon undergoes an 18.7% decrease in thickness and a 29.1% decrease in cross-sectional area in patients with recurrent anterior dislocations compared to the contralateral side. 58 Repetitive stretching by the dislocated humeral head may cause the thinning and decrease in cross-sectional area of the SSC tendon.…”

“…8,10,53,58 Tuoheti et al have shown that the SSC tendon undergoes an 18.7% decrease in thickness and a 29.1% decrease in cross-sectional area in patients with recurrent anterior dislocations compared to the contralateral side. 58 Repetitive stretching by the dislocated humeral head may cause the thinning and decrease in cross-sectional area of the SSC tendon. Gamulin et al have found interstitial fibrosis within the SSC muscle that was compatible with muscle scarring and modifications in the ratio of fiber types, as seen with disuse atrophy in patients with recurrent anterior instability.…”