title: Biomechanical Performance of Hip Labral Repair Techniques.
abstract: To determine the strength of various suture techniques and the impact of suture passer size on cyclically loaded hip labra.
  
  
  
  We assigned 63 bovine hip labra to 9 simple knotless suture technique groups using OrthoCord suture: (1) penetrating grasper (2.6 mm)-placed horizontal mattress, (2) penetrating grasper-placed vertical mattress, (3) SutureLasso (1.8 mm)-placed vertical mattress, (4) penetrating grasper-placed oblique repair, (5) penetrating grasper-placed vertical mattress plus radiofrequency, (6) SutureLasso-placed horizontal mattress, (7) SutureLasso-placed oblique mattress, (8) SutureLasso-placed horizontal mattress plus radiofrequency, and (9) SutureLasso-placed oblique mattress plus radiofrequency. After 20 cycles of uniaxial tensile loading (5 to 80 N), destructive testing was performed.
  
  
  
  Penetrating grasper-placed horizontal mattress sutures showed lower ultimate failure loads than vertical and oblique mattress sutures (P < .05). Penetrating grasper-placed vertical mattress sutures had higher peak-to-peak displacement than SutureLasso-placed vertical mattress sutures (P = .04). SutureLasso-placed oblique mattress sutures had a higher ultimate load (P < .01) and stiffness (P = .04) than SutureLasso-placed horizontal mattress sutures. SutureLasso-placed horizontal mattress sutures had lower cyclic elongation than penetrating grasper-placed horizontal mattress sutures (P = .01) and lower ultimate load (P < .01) and stiffness than SutureLasso-placed vertical mattress sutures (P < .01). Horizontal mattress sutures with radiofrequency had a higher ultimate load (P = .02), stiffness, and cyclic elongation (P < .01) than without radiofrequency.
  
  
  
  A horizontal mattress hip labrum stitch shows a lower ultimate failure load than vertical or oblique mattress stitches. Smaller-diameter suture-passing devices show less cyclic displacement and elongation than larger-diameter devices. Radiofrequency labral treatment does not alter vertical stitch strength but does alter horizontal mattress stitch strength.
  
  
  
  Vertical and oblique stitches are stronger than horizontal stitches. A 1.8-mm passing device shows a better cyclic loading performance than a 2.6-mm device.
authors.affiliation: Department of Orthopedic Surgery, Dokuz Eylül University, İzmir, Turkey. Electronic address: onurhapa@gmail.com.
authors.forename: Onur
authors.initials: O
authors.lastname: Hapa
authors.affiliation: Plano Orthopedic & Sports Medicine Center, Plano, Texas, U.S.A.
authors.forename: F Alan
authors.initials: FA
authors.lastname: Barber
authors.affiliation: Department of Orthopedic Surgery, Dokuz Eylül University, İzmir, Turkey.
authors.forename: Onur
authors.initials: O
authors.lastname: Başçı
authors.affiliation: Department of Orthopedic Surgery, Dokuz Eylül University, İzmir, Turkey.
authors.forename: Levent
authors.initials: L
authors.lastname: Horoz
authors.affiliation: Department of Biomechanics, Dokuz Eylül University, İzmir, Turkey.
authors.forename: Fatih
authors.initials: F
authors.lastname: Ertem
authors.affiliation: Department of Orthopedic Surgery, Dokuz Eylül University, İzmir, Turkey.
authors.forename: Ahmet
authors.initials: A
authors.lastname: Karakaşlı
authors.affiliation: Department of Orthopedic Surgery, Dokuz Eylül University, İzmir, Turkey.
authors.forename: Hasan
authors.initials: H
authors.lastname: Havitçioğlu
mesh_terms: D000818:Animals; D001696:Biomechanical Phenomena / Q000502:physiology; D002358:Cartilage, Articular / Q000293:injuries / Q000502:physiology / Q000601:surgery*; D002417:Cattle; D006621:Hip Joint / Q000502:physiology / Q000601:surgery*; D008422:Materials Testing; D013536:Suture Techniques; D013537:Sutures