title: In vitro and finite element analysis of a novel rotator cuff fixation technique.
abstract: The purpose of this investigation was to assess the biomechanic strength and stress dispersion at the repair site of surface-holding repair techniques for rotator cuff repair compared to the double-row technique. Eighteen bovine infraspinatus tendons were repaired using 3 different repair techniques: double-row repair, surface-holding repair with transosseous sutures, and surface-holding repair with knotless anchors. Biomechanical testing and two-dimensional finite element analysis were performed. The surface-holding repair with transosseous sutures provided 87.9% more stiffness than the double-row repair. The number of tendon-suture site failures of the surface-holding repair with transosseous sutures was smaller than the other 2 techniques. The finite element analysis showed that the surface-holding repair model had a more dispersing stress pattern compared to a double-row repair model. It suggests that these repair techniques can prevent high stress concentration compared to the double-row repair.
authors.affiliation: Department of Orthopaedic Surgery, Hokkaido University Graduate School of Medicine, Sapporo, Hokkaido, Japan. tfunakoshi@gmail.com
authors.forename: Tadanao
authors.initials: T
authors.lastname: Funakoshi
authors.forename: Naoki
authors.initials: N
authors.lastname: Suenaga
authors.forename: Hirotaka
authors.initials: H
authors.lastname: Sano
authors.forename: Naomi
authors.initials: N
authors.lastname: Oizumi
authors.forename: Akio
authors.initials: A
authors.lastname: Minami
mesh_terms: D000818:Animals; D002417:Cattle; D020342:Finite Element Analysis; D011474:Prosthesis Design; D011897:Random Allocation; D017006:Rotator Cuff / Q000601:surgery*; D000070636:Rotator Cuff Injuries; D012421:Rupture; D013314:Stress, Mechanical; D053441:Suture Anchors; D013536:Suture Techniques; D013537:Sutures; D013718:Tensile Strength