title: Ranges of motion after reverse shoulder arthroplasty improve significantly the first year after surgery in patients with rheumatoid arthritis.
abstract: OBJECTIVE
  To evaluate the trajectory of the change in range of motion after reverse shoulder joint replacement during 3-year follow-up among patients with rheumatoid arthritis.
  
  
  METHODS
  Retrospective cohort longitudinal study of 76 shoulder replacements performed in a university clinic. The range of shoulder motion was assessed by a physiotherapist using a manual goniometer with 5-degree precision before the surgery and 1, 3, 6, 12, and 36 months postoperatively.
  
  
  RESULTS
  The shapes of the regression curves suggest that the improvement or decline observed in joint motion was happening mostly during the first year after surgery. After 1 year, the trajectories become flat and they remained unchanged until the end of follow-up.
  
  
  CONCLUSIONS
  After shoulder joint replacement, the range of shoulder motion showed substantial changes during the first year only. This should be taken into account when scheduling control visits, planning rehabilitation, and predicting the use of community services after the surgery.
authors.affiliation: Department of Rheumaorthopaedic Surgery, Turku University Hospital and University of Turku, PO Box 52, 20521, Turku, Finland. hannu.tiusanen@tyks.fi.
authors.forename: Hannu
authors.initials: H
authors.lastname: Tiusanen
authors.affiliation: Department of Rheumaorthopaedic Surgery, Turku University Hospital and University of Turku, PO Box 52, 20521, Turku, Finland.
authors.forename: Pjotor
authors.initials: P
authors.lastname: Sarantsin
authors.affiliation: Department of Rheumaorthopaedic Surgery, Turku University Hospital and University of Turku, PO Box 52, 20521, Turku, Finland.
authors.forename: Miika
authors.initials: M
authors.lastname: Stenholm
authors.affiliation: Department of Orthopedic Surgery, Physical Medicine and Rehabilitation, Stanford University Hospital and Clinics, Stanford, CA, USA.
authors.forename: Ryan
authors.initials: R
authors.lastname: Mattie
authors.affiliation: Department of Physical and Rehabilitation Medicine, Turku University Hospital and University of Turku, Turku, Finland.
authors.forename: Mikhail
authors.initials: M
authors.lastname: Saltychev
mesh_terms: D000359:Aftercare / Q000458:organization & administration; D000368:Aged; D001172:Arthritis, Rheumatoid / Q000175:diagnosis / Q000601:surgery; D019643:Arthroplasty, Replacement / Q000379:methods*; D005260:Female; D006801:Humans; D007595:Joint Prosthesis; D008137:Longitudinal Studies; D008297:Male; D008875:Middle Aged; D011184:Postoperative Period; D011859:Radiography / Q000379:methods; D016059:Range of Motion, Articular; D020127:Recovery of Function; D012785:Shoulder Joint / Q000000981:diagnostic imaging / Q000503:physiopathology / Q000601:surgery
keywords: Articular; Range of motion; Reverse shoulder; Rheumatoid arthritis; Shoulder arthroplasty