Most of the minimally displaced proximal humerus fractures in people > 65 years age will unite uneventfully ant the outcomes will be good.
However sometimes these fractures are moderately to severely displace and may be accompanied with a head dislocation.
The bone of contention is the highly comminuted and displaced fractures, which pose a significant challenge for the treating physician.....
What are the available options for someone who had a fracture of proximal shoulder, which hasn’t united? One, he has a painful shoulder and 2nd he has limited motion.
Mostly this will be found in old individuals with a poor bone stock, which was a contributory factor to non-union in the first place.
A traditional approach which fails very often would be to attempt refixation with bone grafting. However this may not result in union of the fracture besides giving him a very stiff shoulder.....