PMID- 35572439
OWN - NLM
STAT- PubMed-not-MEDLINE
LR  - 20220519
IS  - 2666-6383 (Electronic)
IS  - 2666-6383 (Linking)
VI  - 6
IP  - 3
DP  - 2022 May
TI  - Does lateralizing the glenosphere center of rotation by 4 mm decrease scapular 
      notching in reverse shoulder arthroplasty with a 135 degrees  humeral component?
PG  - 442-446
LID - 10.1016/j.jseint.2021.12.005 [doi]
AB  - BACKGROUND: Scapular notching continues to be associated with reverse shoulder 
      arthroplasty (RSA) and is thought to lead to fewer outcomes. Decreasing the 
      humeral neck-shaft angle (NSA) has been associated with decreased incidence of 
      scapular notching. Lateralizing the glenosphere center of rotation (COR) has also 
      been proposed to decrease notching; however, its effect in lower NSA RSA is less 
      understood. The purpose of this study was to compare the impact of the medial (0 
      mm) and lateral (4 mm) COR on the incidence of scapular notching and clinical 
      outcomes after RSA with a 135 degrees  NSA humeral component. METHODS: We performed a 
      multicenter retrospective comparative cohort of 82 patients with cuff tear 
      arthropathy (41 in each cohort) who underwent RSA with a 135 degrees  NSA humeral 
      component and a glenosphere COR of either 0 mm (medialized COR [MCOR]) or 4 mm 
      (lateralized COR [LCOR]) of lateralization. RSA was performed using the same 135 degrees  
      humeral system and baseplate design. All patients had 2-year radiographic and 
      clinical follow-up. Postoperative radiographs were evaluated for scapular 
      notching. Clinical outcomes included American Shoulder and Elbow Surgeons scores, 
      visual analog pain scale, Simple Assessment Numeric Evaluation, and active range 
      of motion. RESULTS: The overall incidence of scapular notching was 22.0%. There 
      was no significant difference in scapular notching between cohorts: 24.4% in the 
      MCOR and 19.5% in the LCOR (P = .625). Both cohorts had significant improvements 
      in American Shoulder and Elbow Surgeons scores, visual analog pain scale, Simple 
      Assessment Numeric Evaluation, and active range of motion postoperatively 
      (P < .005). Improvements did not significantly differ between cohorts. The 
      presence of scapular notching did not have a significant negative effect on any 
      clinical outcome measure. Complications occurred in 5 patients (2 MCORs and 3 
      LCORs), none of which occurred in patients with scapular notching. DISCUSSION AND 
      CONCLUSION: Lateralizing the glenosphere COR by 4 mm does not significantly 
      affect the incidence of scapular notching in RSA when using a 135 degrees  NSA humeral 
      component at short-term follow-up. Furthermore, such offset does not 
      significantly improve functional outcome scoring systems or range of motion when 
      compared with the MCOR (0 mm). Scapular notching did not have a negative impact 
      on any clinical outcome measure or complication rate in this series.
CI  - (c) 2022 The Authors.
FAU - Harmsen, Samuel M
AU  - Harmsen SM
AD  - TOCA at Banner Health, Phoenix, AZ, USA.
AD  - The University of Arizona College of Medicine, Phoenix, AZ, USA.
FAU - Robaina, Joey
AU  - Robaina J
AD  - The University of Arizona College of Medicine, Phoenix, AZ, USA.
FAU - Campbell, David
AU  - Campbell D
AD  - The University of Arizona College of Medicine, Phoenix, AZ, USA.
FAU - Denard, Patrick J
AU  - Denard PJ
AD  - Southern Oregon Orthopedics, Medford, OR, USA.
AD  - Department of Orthopedics and Rehabilitation, Oregon Health & Science University, 
      Portland, OR, USA.
FAU - Gobezie, Reuben
AU  - Gobezie R
AD  - The Cleveland Shoulder Institute, Cleveland, OH, USA.
FAU - Lederman, Evan S
AU  - Lederman ES
AD  - The University of Arizona College of Medicine, Phoenix, AZ, USA.
AD  - Banner Health, Phoenix, AZ, USA.
LA  - eng
PT  - Journal Article
DEP - 20220125
PL  - United States
TA  - JSES Int
JT  - JSES international
JID - 101763461
PMC - PMC9091732
OTO - NOTNLM
OT  - 135 degrees  neck-shaft angle
OT  - Center of rotation
OT  - Lateralization
OT  - Reverse shoulder arthroplasty
OT  - Scapular notching
EDAT- 2022/05/17 06:00
MHDA- 2022/05/17 06:01
PMCR- 2022/01/25
CRDT- 2022/05/16 04:12
PHST- 2022/05/16 04:12 [entrez]
PHST- 2022/05/17 06:00 [pubmed]
PHST- 2022/05/17 06:01 [medline]
PHST- 2022/01/25 00:00 [pmc-release]
AID - S2666-6383(22)00022-6 [pii]
AID - 10.1016/j.jseint.2021.12.005 [doi]
PST - epublish
SO  - JSES Int. 2022 Jan 25;6(3):442-446. doi: 10.1016/j.jseint.2021.12.005. 
      eCollection 2022 May.