RT Journal A1 Liavaag, Sigurd A1 Brox, Jens Ivar A1 Pripp, Are Hugo A1 Enger, Martine A1 Soldal, Lars Atle A1 Svenningsen, Svein T1 Immobilization in External Rotation After Primary Shoulder Dislocation Did Not Reduce the Risk of RecurrenceA Randomized Controlled Trial JF The Journal of Bone & Joint Surgery JO The Journal of Bone & Joint Surgery YR 2011 FD May 18 VO 93 IS 10 SP 897 OP 904 DO 10.2106/JBJS.J.00416 UL http://dx.doi.org/10.2106/JBJS.J.00416 AB Background:  The treatment of primary traumatic anterior shoulder dislocation varies widely from no immobilization, to two or three weeks of immobilization in internal rotation with the arm in a sling, to treatment with a brace in external rotation. The aim of the present clinical trial was to compare immobilization in internal and external rotation after anterior shoulder dislocation.Methods:  One hundred and eighty-eight patients with a primary anterior traumatic dislocation of the shoulder were randomly assigned to treatment with immobilization in either internal rotation (ninety-five patients) or external rotation (ninety-three patients) for three weeks. The primary outcome measure was a recurrent dislocation within twenty-four months of follow-up.Results:  The follow-up rate after a minimum period of two years was 97.9% (ninety-three of ninety-five) in the internal rotation group and 97.8% (ninety-one of ninety-three) in the external rotation group. The compliance rate with the immobilization was 47.4% (forty-five of ninety-five) in the internal rotation group and 67.7% (sixty-three of ninety-three) in the external rotation group. The intention-to-treat analyses showed that the recurrence rate was 24.7% (twenty-three of ninety-three) in the internal rotation group and 30.8% (twenty-eight of ninety-one) in the external rotation group (p = 0.36).Conclusions:  Immobilization in external rotation does not reduce the rate of recurrence for patients with first-time traumatic anterior shoulder dislocation.Level of Evidence:  Therapeutic Level I. See Instructions to Authors for a complete description of levels of evidence.