MRI may be a poor way to assess cuff healing and failure in continuity is a common phenomenon.It depends upon vertical or horizonatal power weakness that we need to plan our further management
By rotator cuff lesion I follow up condition with ultrasonografy in dynamic position, 6 weeks after lesion patient can move arm in abduction to 90 degrees and step by step to maximum in flexion and abduktion in next 3 months. external Rotation and abduction can make full after 4 months and with weight after 6 months of starting rehabilitation.
I agree with Prof. Popova-Ramova. Well staged mobilization exercising leads in most cases to gradual increase in ROM. Some patients may reach full ROM before 4 months after starting exerices.
Ultrasound scan (US) is proven to be as reliable as MRI for rotator cuff diagnosis and can be static or dynamic. MRI usually is static. Also US scan is cheaper than MRI. Personally use US scan for the study of rotaor cuff and post op regime is 10/7 to 2/52 in abduction and movement up to 90 degrees with passive assisted exercises. Then 2/52 light active assisted up to 90 degrees combined with CPM, followed by light active for the last 2/52 but trying to cover the whole range. Controlled movement with Physio supervision up to 3/12. Manual workers expected back to work in 4-6/12.