Stump classification was correlated with retear in the suture-bridge and double-row repair techniques for arthroscopic rotator cuff repair.
PURPOSE
The Stump classification is significantly correlated with a retear after arthroscopic rotator cuff repair. However, no study has evaluated whether or not the stump classification is correlated with retear in the suture-bridge or double-row repair techniques. The aim of this study was to evaluate the relationship between a retear and the stump classification in the suture-bridge and double-row repair techniques.


METHODS
Among 389 patients who underwent arthroscopic repairs of full-thickness rotator cuff tears using suture-bridge or double-row repair techniques, 326 patients (median age 67.0 years; range 25-85) were included. There were 51 small, 172 medium, 83 large, and 20 massive tears. Two hundred forty patients were treated with the suture-bridge technique, and 86 patients were treated with the double-row technique. The following variables were analyzed: age, sex, the Cofield classification, anteroposterior and mediolateral tear size on preoperative MRI, global fatty degeneration index, and the stump classification. Cuff integrity was evaluated on magnetic resonance imaging at 6 months after surgery. The patients were divided into the intact and retear groups and the relationship between the variables and retear was evaluated by multivariate logistic regression analysis.


RESULTS
The overall retear rate was 10.1%. In the multivariate logistic regression analysis, the independent predictors of a retear were the stump classification type 3 (Odds ratio: 4.71, p = 0.0246), global fatty degeneration index (Odds ratio: 3.87, p = 0.0030), and anteroposterior tear size (Odds ratio: 1.07, p = 0.0077) in the suture bridge technique. In the double-row technique, the independent predictors of retear were stump classification type 3 (Odds ratio: 7.82, p = 0.0348), and age (Odds ratio: 1.22, p = 0.0163).


CONCLUSION
The stump classification was significantly correlated with retear in the suture-bridge and double-row repair technique. Stump classification type 3 was indicated to be an important risk factor for predicting retear.


LEVEL OF EVIDENCE
III.
['Takeuchi|Naohide|N|http://orcid.org/0000-0002-9088-0835', 'Kozono|Naoya|N|', 'Nishii|Akihiro|A|', 'Matsuura|Koumei|K|', 'Ishitani|Eiichi|E|', 'Onizuka|Toshihiro|T|', 'Zaitsu|Yoshihisa|Y|', 'Okada|Takamitsu|T|', 'Mizuki|Yasuhiro|Y|', 'Kimura|Takehiro|T|', 'Yuge|Hidehiko|H|', 'Uchimura|Taiki|T|', 'Iura|Kunio|K|', 'Mori|Tatsuya|T|', 'Ueda|Koki|K|', 'Miake|Go|G|', 'Senju|Takahiro|T|', 'Takagishi|Kenji|K|', 'Nakashima|Yasuharu|Y|']
D000328:Adult D000368:Aged D000369:Aged, 80 and over D001182:Arthroscopy D006801:Humans D008279:Magnetic Resonance Imaging D008875:Middle Aged D012189:Retrospective Studies D017006:Rotator Cuff D000070636:Rotator Cuff Injuries D013536:Suture Techniques D013537:Sutures D016896:Treatment Outcome
Stump classification Retear Risk factor Arthroscopic rotator cuff tear