Suggest Treatment For A.V. Necrosis

My wife (43 years) has A.V. Necrosis of both the shoulders. Her right shoulder was replaced seven years back (when she was 36 years). She does not have any pain in the replaced shoulder now, but the problem is that she cannot move her hand on the back side.

Now she wants to be operated for the left shoulder also as the joint has deteriorated very much. Is there any improvement in the technology whereby she can move her hand on the back side after the replacement operation?