title: Comparison of the clinical outcomes of single- and double-row repairs in rotator cuff tears.
abstract: BACKGROUND
  Although research has demonstrated the superiority of double-row rotator cuff repair over single-row methods from a biological and mechanical point of view, few studies have compared clinical outcome of the 2 methods, and no articles have been published describing the superiority of double-row methods in clinical aspects.
  
  
  OBJECTIVE
  Arthroscopic double-row repair of a rotator cuff tear has superior clinical outcome to single-row repair.
  
  
  METHODS
  Cohort study; Level of evidence, 2.
  
  
  METHODS
  The study included 78 patients operated on for full-thickness rotator cuff tears between May 2002 and May 2004. A single-row fixation method was used in the first consecutive 40 patients, and a double-row fixation method was used in the next consecutive 38 patients. The mean age at surgery was 56 years. At 2 years after surgery, final evaluation was done with American Shoulder and Elbow Surgeons and Constant scoring systems and the Shoulder Strength Index. The Shoulder Strength Index is a new evaluation method to estimate relative shoulder strength compared with the unaffected shoulder.
  
  
  RESULTS
  At final follow-up, the average American Shoulder and Elbow Surgeons scores were 91.6 in the single-row group and 93.0 in the double-row group. The Constant score was 76.7 in the single-row group and 80.0 in the double-row group. Functional outcome was improved in both groups after surgery, but there was no significant difference between the 2 groups. When the patients were further divided by size of tear, there was still no difference between the repair techniques in the patients with small to medium (<3 cm) tears. However, in patients with large to massive tears (>3 cm), the American Shoulder and Elbow Surgeons and Constant scores and Shoulder Strength Index were all significantly better in the group that had double-row repair.
  
  
  CONCLUSIONS
  Small to medium rotator cuff tears should be repaired with the single-row method, and large to massive tears should be repaired with the double-row method.
authors.affiliation: Shoulder, Elbow and Sports Service, Department of Orthopaedic Surgery, Konkuk University School of Medicine, Seoul, Korea. drpark@chol.comor
authors.forename: Jin-Young
authors.initials: JY
authors.lastname: Park
authors.forename: Sang-Hoon
authors.initials: SH
authors.lastname: Lhee
authors.forename: Jin-Hyung
authors.initials: JH
authors.lastname: Choi
authors.forename: Hong-Keun
authors.initials: HK
authors.lastname: Park
authors.forename: Je-Wook
authors.initials: JW
authors.lastname: Yu
authors.forename: Joong-Bae
authors.initials: JB
authors.lastname: Seo
mesh_terms: D000328:Adult; D000368:Aged; D001182:Arthroscopy / Q000379:methods; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008875:Middle Aged; D019637:Orthopedic Procedures / Q000379:methods*; D017006:Rotator Cuff / Q000473:pathology / Q000502:physiology / Q000601:surgery*; D000070636:Rotator Cuff Injuries; D013718:Tensile Strength; D016896:Treatment Outcome; D014945:Wound Healing