That's a really good question, I have asked on researchgate a similar one regarding rotator cuff repairs.
As far as I had searched the literature, it does not seem to have a lot of evidence on the topic and still relies more on surgeons experience. It is something I am personally interested in exploring.
I strongly agree, there are some evidence on shoulder braces regarding traumatic shoulder dislocation but we all know braces are widely used after postoperative conditions.
Hello Elif, I personally use the sling in all the postop patientents, the vast majority in neutral position ( confortable as the patients feel like) only use in external rotation ( that means 30° aprox. ) in cases of posterior dislocation, the method used by Itoi of external rotation in anterior instability is no longer used...ok?
I agree with dr Tsvetkov, that post immobilization is to temporary restrict ROM and protect soft tissue healing. In my routine practice I use a brace in internal rotation except of cases of surgery addressing posterior instability, posterior dislocation and palliative incomplete supers-posterior RC reconstruction (infraspinatus, trees major tears). In these cases i recommend neutral position or even slight external rotation. Always 6 week and passive ROM exercises from 2nd post day.
One article and one editorial published this month. I think we are still far from reliable evidence on the topic.
Based on what I am observing with my PhD data, I think the "secret" of sling influencing good outcomes is not on arm positioning, but on how many hours per day and for how many weeks patients are using it after surgery. The 6-weeks after cuff repairs based on the mechanobiology and healing stages do not seem to be appropriate, but we still lack strong evidence to confirm or refute that.