Shoulder dislocations can be very complex and unforgiving when it comes to rehab and return-to-work. A simple, straightforward dislocation can be vastly different from a traumatic injury with soft tissue, cartilage, and capsular damage in and around the joint.
For someone to complete a conservative (nonoperative) treatment program in eight weeks and get back on-the-job is pretty good. Most patients with clinically stable shoulders (i.e., who have a negative apprehension test) are able to resume full physical activity about three months after the injury.
There is always a risk of recurrence after a traumatic dislocation. This may not happen at first while you are being cautious in how you use the arm. If the shoulder dislocates a second time, studies show this is most likely 10 to 17 months after the first injury.
Age is a factor in second (recurrent) shoulder dislocations. Younger adults tend to have the highest rate of shoulder redislocations. Older (perhaps less active) adults have a lower risk of redislocation.