[en] The following procedures were performed on 23 patients (15 of them males): a shoulder strength isokinetic evaluation of the internal (IR) and external (ER) rotators (with the shoulder 45 degrees and 90 degrees abducted in the frontal plane), a passive range of motion measurement, a Rowe score and a scanner exam. These patients had previously undergone open coracoid transposition using Latarjet's technique according to two different surgical procedures: a tenotomy (n = 6) or a splitting (n = 17) of the subscapularis muscle approach. In our retrospective study, the period of time between surgery and assessment was an average of 30 months. The average Rowe score was 89 on a scale of 100, with a good pattern of passive mobility. The isokinetic data showed an external rotator weakness (in all testing conditions), most notably at 60 degrees/s in 45 degrees of abduction position (p < 0.001 - 12.2%). By contrast, the internal rotators were only significantly (p < 0.05) impaired (8.2%) at 60 degrees/s in the 90 degrees of abduction position. Consequently, the external/internal rotator ratio (ERAR) was reduced in the 45 degrees of abduction installation only, highlighting the influence of testing position on the isokinetic results and therefore on the shoulder muscle profile. Surgical technique comparison revealed that only the tenotomy procedure entailed an IR deficit (17%) measured at 45 degrees of abduction installation. Shoulders (n = 5) presenting a fatty degeneration of the subscapularis muscle >= stage II (corresponding exclusively to the tenotomy surgical approach) showed an internal rotator weakness (19%) measured in 45 degrees of abduction. Patients (n = 13) without subscapularis fatty degradation (corresponding solely to the horizontal splitting approach) did not develop any impairment of strength in internal rotators. Furthermore, no correlation between mobility pattern and strength impairment was observed in the study.
Disciplines :
Orthopedics, rehabilitation & sports medicine Laboratory medicine & medical technology
Author, co-author :
Forthomme, Bénédicte ; Université de Liège - ULiège > Département des sciences de la motricité > Rééducation du membre supérieur
J.A. Abboud and L.J. Soslowsky, Interplay of the static and dynamic restraints in glenohumeral instability, Clin Orthop Rel Research 400 (2002), 48-57.
J. Allain, D. Goutallier, C. Glorion and D. Creteil, Long-term results of Latarjet procedure for the treatment of anterior instability of the shoulder, J Bone Joint Surg 80 (1998), 841-852.
M.N. Benammar, D. Saragaglia, J.J. Legrand, C. Faure and J. Butel, L'intervention de Latarjet dans les luxations antérieures récidivantes de l'épaule. 117 cas avec un recul de 8 ans, Rev Chir Orthop 72 (1986), 447-154.
P.R. Cain, T.A. Mutschler, F.H. Fu and S.K. Lee, Anterior stability of the glenohumeral joint. A dynamic model, Am J Sports Med 15 (1987), 144-148.
R.A. Donatelli, ed., Physical therapy of the shoulder, 4th edition. Churchill Livingstone: Elsevier, 2004.
G. Felicetti, A.D. Scarabelli, C. Gastaldi, D. Rovati and M. Maini, Isokinetic assessment and mid-term work reincorporation of patients surgically treated with the shoulder Latarjet technique, Giornale Italiano di Medicina del Lavoro Ed Ergonomia 22 (2000), 324-327.
B. Forthomme, J.M. Crielaard and J.L. Croisier, Shoulder isokinetic assessment: an update (Submitted).
T.J. Gill and B. Zarins, Open repairs for the treatment of anterior shoulder instability, Am J Sports Med 31 (2003), 142-153.
D. Goutallier, J.M. Postel, J. Bernageau, L. Lavau and M.C. Voisin, La dégénérescence graisseuse des muscles des coiffes tendineuses rompues de l'épaule, Revue Rhumatisme 62 (1995), 439-446.
D. Huguet, G. Pietu, C. Bresson, F. Potaux and J. Letenneur, Instabilité antérieure de l'épaule chez le sportif: à propos de 51 cas de stabilisation par intervention de Latarjet-Patte, Acta Orthop Belgica 62 (1996), 200-206.
E. Itoi, W. Watanabe, S. Yamada, T. Shimizu and I. Wakabayashi, Range of motion after Bankart repair. Vertical compared with horizontal capsulotomy, Am J Sports Med 29 (2001), 441-445.
W.N. Levine and E.L. Flatow, The pathophysiology of shoulder instability, Am J Sports Med 28 (2000), 910-917.
E.C. MacCarty, P. Ritchie, H.S. Gill and E.G. McFarland, Shoulder instability: return to play, Clin Sports Med 23 (2004), 335-351.
E.G. McFarland, T.K. Kim, P. Banchasuek and E. McCarthy, Histologic evaluation of the shoulder capsule in normal shoulders, unstable shoulders, and after failed thermal capsulorrhaphy, Am J Sports Med 30 (2002), 636-642.
A. Paxinos, J. Walton, A. Tzannes, M. Callanan, K. Hayes and G.A.C. Murrell, Advances in the management of traumatic anterior and atraumatic multidirectional shoulder instability, Sports Med 31 (2000), 819-828.
F. Picard, D. Saragaglia, E. Montbarbon, Y. Tourne, F. Thony and A. Charbel, Conséquences anatomo-cliniques de la section verticale du muscle sub-scapulaire dans l'intervention de Latarjet, Rev Chir Orthop 84 (1998), 217-223.
W.D. Regan, S. Webster-Bogaert, R.J. Hawkins and P.J. Fowler, Comparative functional analysis of the Bristow, Magnuson-Stack, and Putti-Platt procedures for recurrent dislocation of the shoulder, Am J Sports Med 17 (1989), 42-48.
C.R. Rowe, The shoulder, Edinburgh, Churchill Livingstone, 1985.
S.C. Schiffern, R. Rozencwaig, J. Antoniou, M.L. Richardson and F.A. Matsen, Anteroposterior centering of the humeral head on the glenoid in vivo, Am J Sports Med 30 (2002), 382-387.
L.I. Tsai, T. Wredmark, C. Johansson, K. Gibo, B. Engström and M. Törnqvist, Shoulder function in patients with unoperated anterior shoulder instability, Am J Sports Med 19 (1991), 469-473.
C. Vander Maren, B. Geulette, J. Lewalle, J. Mullier, J.C. Autrique, J. Thiery and J. Deneufbourg, Butée coracoïdienne selon Latarjet versus opération de Bankart. Etude comparative des résultats à propos de 50 cas, Acta Orthop Belgica 59 (1993), 148-155.
J.J. Warner, L.J. Micheli, L.E. Arslanian, J. Kennedy and R. Kennedy, Patterns of flexibility, laxity and strength in normal shoulders and shoulder with instability and impingement, Am J Sports Med 18 (1990), 366-375.