Dr. Gelabert (UCLA Vascular Surgeon) has brought this up before as a concern after rib resection or scalenectomy if you aren't moving your shoulder joint enough post-op. My fiancé had bicep reattachment and during recovery suffered Frozen Shoulder - it was awful! Through PT and chiropractics (we have a no-cracking chiro here) he was able to get close to his previous ROM. I wish you lots of luck, it is not an easy recovery but it is possible.