title: Biomechanical Performance of Medial Row Suture Placement Relative to the Musculotendinous Junction in Transosseous Equivalent Suture Bridge Double-Row Rotator Cuff Repair.
abstract: OBJECTIVE
  To compare the biomechanical performance of medial row suture placement relative to the musculotendinous junction (MTJ) in a cadaveric transosseous equivalent suture bridge (TOE-SB) double-row (DR) rotator cuff repair (RCR) model.
  
  
  METHODS
  A TOE-SB DR technique was used to reattach experimentally created supraspinatus tendon tears in 9 pairs of human cadaveric shoulders. The medial row sutures were passed either near the MTJ (MTJ group) or 10 mm lateral to the MTJ (rotator cuff tendon [RCT] group). After the supraspinatus repair, the specimens underwent cyclic loading and load to failure tests. The localized displacement of the markers affixed to the tendon surface was measured with an optical tracking system.
  
  
  RESULTS
  The MTJ group showed a significantly higher (P = .03) medial row failure (5/9; 3 during cyclic testing and 2 during load to failure testing) compared with the RCT group (0/9). The mean number of cycles completed during cyclic testing was lower in the MTJ group (77) compared with the RCT group (100; P = .07) because 3 specimens failed in the MTJ group during cyclic loading. There were no significant differences between the 2 study groups with respect to biomechanical properties during the load to failure testing.
  
  
  CONCLUSIONS
  In a cadaveric TOE-SB DR RCR model, medial row sutures through the MTJ results in a significantly higher rate of medial row failure.
  
  
  CONCLUSIONS
  In rotator cuff tears with tendon tissue loss, passage of medial row sutures through the MTJ should be avoided in a TOE-SB RCR technique because of the risk of medial row failure.
authors: Division of Shoulder and Elbow, Department of Orthopaedic Surgery, New York University Hospital for Joint Diseases, New York, New York, U.S.A.
authors: Mandeep S
authors: MS
authors: Virk
authors: Sports and Shoulder and Elbow Division, Department of Orthopaedic Surgery, Midwest Orthopaedics at Rush University, Chicago, Illinois, U.S.A.
authors: Benjamin
authors: B
authors: Bruce
authors: Sports and Shoulder and Elbow Division, Department of Orthopaedic Surgery, Midwest Orthopaedics at Rush University, Chicago, Illinois, U.S.A.
authors: Kristen E
authors: KE
authors: Hussey
authors: Sports and Shoulder and Elbow Division, Department of Orthopaedic Surgery, Midwest Orthopaedics at Rush University, Chicago, Illinois, U.S.A.
authors: Jacqueline M
authors: JM
authors: Thomas
authors: Sports and Shoulder and Elbow Division, Department of Orthopaedic Surgery, Midwest Orthopaedics at Rush University, Chicago, Illinois, U.S.A.
authors: Tyler A
authors: TA
authors: Luthringer
authors: Sports and Shoulder and Elbow Division, Department of Orthopaedic Surgery, Midwest Orthopaedics at Rush University, Chicago, Illinois, U.S.A.
authors: Elizabeth F
authors: EF
authors: Shewman
authors: Sports and Shoulder and Elbow Division, Department of Orthopaedic Surgery, Midwest Orthopaedics at Rush University, Chicago, Illinois, U.S.A.
authors: Vincent M
authors: VM
authors: Wang
authors: Sports and Shoulder and Elbow Division, Department of Orthopaedic Surgery, Midwest Orthopaedics at Rush University, Chicago, Illinois, U.S.A.
authors: Nikhil N
authors: NN
authors: Verma
authors: Sports and Shoulder and Elbow Division, Department of Orthopaedic Surgery, Midwest Orthopaedics at Rush University, Chicago, Illinois, U.S.A.
authors: Anthony A
authors: AA
authors: Romeo
authors: Sports and Shoulder and Elbow Division, Department of Orthopaedic Surgery, Midwest Orthopaedics at Rush University, Chicago, Illinois, U.S.A.. Electronic address: Brian.Cole@rushortho.com.
authors: Brian J
authors: BJ
authors: Cole
mesh_terms: D001696:Biomechanical Phenomena; D002102:Cadaver; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D000070636:Rotator Cuff Injuries / Q000601:surgery*; D013314:Stress, Mechanical; D013536:Suture Techniques