ISAKOS: 2019 Congress in Cancun, Mexico

2019 ISAKOS Biennial Congress ePoster #2029


The Association between Critical Shoulder Angle and Atraumatic Rotator Cuff Tears

Carlos I. Palomo-Pizarro, MD, Madrid, Madrid SPAIN
David Gomez-Garrido, MD, Villalba, Madrid SPAIN
Ignacio Perez-Gurbindo, Prof., Madrid, Madrid SPAIN
Miguel Angel Hernan-Prado, MD, Pozuelo de Alarcón, Madrid SPAIN

Hospital Universitario Santa Cristina, Madrid, Madrid, SPAIN

FDA Status Not Applicable


It is unknown both the impact of high critical shoulder angle after the repair of rotator cuff and if the surgery itself may alter the natural development of recovery.


- Background
The critical shoulder angle (CSA) has been described by Moor et al. CSA as a radiographic measure defined by the angle between a line connecting the inferior margin of the glenoid to the inferolateral edge of the acromion and a line connecting the superior and the inferior margins of the glenoid.
CSA over 35º has been demonstrated to be associated with an increased of rotator cuff tears (RCT), although RCT are multifactorial. CSA has been demonstrated as positively associated with the incidence of rotator cuff tears.


Our hypothesis was that individuals with CSA over 35º have poor patient-reported outcome score and more re-tear prevalence when compared with those with CSA lower than 35º.


Cohort Study of 100 patients with atraumatic full-thickness RCTs who underwent arthroscopic RCR were retrospectively evaluated. Demographic data as well as preoperative CSA, complications, re-tear and Constant-Murley score at 7 years.

- Result
Controlling for demographic and clinical characteristics, a multilevel regression analysis, demonstrated that the CSA was not a significant independent predictor for change in Constant-Murley score (P. 173) or re-tear (P. 678) at 7 years after arthroscopic RCR.
The correlation between the re-tear and low value of Constant-Murley score was positive.


In our study, the preoperatory CSA did not appear to be a significant predictor of re-tear of RCT and poor outcome in Constant-Murley score at 7 years after repair of atraumatic full-thickness RCTs.