Dislocations caused by trauma are 85-90% to reoccur. The capsule, ligaments, tendons, and musculature are all damaged to some extent. You will definitely need rehabilitation to get your shoulder strong enough to stabilize with overhead movements. There are several types of braces you can wear in order to minimize the risk of another dislocation or subluxation (
Sully® Shoulder Stabilizer)..
I have dislocated several times, being too stubborn to get the surgery needed to fix my shoulder, I just strengthen all the muscles and wear that brace and hope for the best. There will come a time when I will have no choice but to get it fixed.