This procedure is used in case of: atraumatic instability, as part of a Bankart repair for traumatic instability or for internal impingement (Thrower’s shoulder).
Capsular shrinkage causes restricted movement, although, when intact, it is very thin and does not contribute to the stability in the shoulder joint- capsule tensioning is usually indicated by the surrounding ligaments and muscles (Itoi et al., 2015).
It is used specifically for shoulders where capsular stretching appears to be the major source of the problem. With posterior medial capsular plication translation is reduced, without any restriction in motion (Werner et al., 2017).
In the same way that you would use strapping around the shoulder to increase skin sensory input we can improve the shoulder proprioception by tightening the capsule. As this procedure is done arthroscopically and nothing has been incised or stitched, there is no need to wait to start post-operative physiotherapy.
Werner et al., 2017, Medial Posterior Capsular Plication Reduces Anterior Shoulder Instability Similar to Remplissage Without Restriction Motion in the Setting of an Engaging Hill-Sachs Defect, American Journal of Sports Medicine, doi: 10.1177/0363546517700860
Itoi E. et al., 2015, Shoulder Stiffness: Current Concepts and Concerns, Springer, Heidelberg, Germany, p: 131