Burkhead and Rockwood treated 140 shoulders with progressive resistance exercises and asked whether instability etiology predicts rehabilitation success. Patients were classified into traumatic (Types I/II) and atraumatic (Types III/IV) groups using history, examination, and radiographs. The study provides the foundational evidence for etiology-driven decision-making in shoulder instability management.
The reflex before this paper was to classify shoulder instability by direction — anterior, posterior, multidirectional. And plan surgery accordingly. Burkhead and Rockwood reframed the decision around etiology, and the outcome data made the case impossible to ignore.
When you see posterior or multidirectional instability in a young patient with generalized laxity and no osseous changes on imaging, commit to a full progressive resistance program. The 83% success rate in atraumatic cases is high enough that surgery is rarely the right first move. And applying a traumatic-instability repair to an atraumatic shoulder is well-documented to cause catastrophic failure.
When the history includes a discrete traumatic event, a Hill-Sachs lesion, or a prior dislocation, set expectations at the first visit: only 9-16% will respond to exercise alone. A trial is still warranted, but the reconstruction conversation should happen early, not after months of failed therapy.
Type IIIA (voluntary subluxation with psychiatric comorbidity) is a hard stop for surgery. Refer to psychiatry, never to the OR. Recognizing this subtype during the rehabilitation period, before an operation is performed, is one of the most practical contributions of this paper.
Burkhead and Rockwood treated 140 shoulders with progressive resistance exercises and asked whether instability etiology predicts rehabilitation success. Patients were classified into traumatic (Types I/II) and atraumatic (Types III/IV) groups using history, examination, and radiographs. The study provides the foundational evidence for etiology-driven decision-making in shoulder instability management.
The reflex before this paper was to classify shoulder instability by direction — anterior, posterior, multidirectional. And plan surgery accordingly. Burkhead and Rockwood reframed the decision around etiology, and the outcome data made the case impossible to ignore.
When you see posterior or multidirectional instability in a young patient with generalized laxity and no osseous changes on imaging, commit to a full progressive resistance program. The 83% success rate in atraumatic cases is high enough that surgery is rarely the right first move. And applying a traumatic-instability repair to an atraumatic shoulder is well-documented to cause catastrophic failure.
When the history includes a discrete traumatic event, a Hill-Sachs lesion, or a prior dislocation, set expectations at the first visit: only 9-16% will respond to exercise alone. A trial is still warranted, but the reconstruction conversation should happen early, not after months of failed therapy.
Type IIIA (voluntary subluxation with psychiatric comorbidity) is a hard stop for surgery. Refer to psychiatry, never to the OR. Recognizing this subtype during the rehabilitation period, before an operation is performed, is one of the most practical contributions of this paper.