Abstract:
BACKGROUND:Retearing mechanism after transosseous equivalent (TOE) rotator cuff repair has not been fully clarified yet. OBJECTIVE:The purposes of this study were to compare the stress distribution pattern in the tendon stump between knotted and knotless TOE repair and to investigate the role of suture tension applied during medial knot tying using a 3-dimensional finite element (3D-FE) method. METHODS:Both knotted and knotless TOE repairs were simulated on the 3D-FE human rotator cuff tear model. Elastic analysis was performed to compare the stress distribution pattern inside the tendon between the two models. The amount of compressive load applied to the medial-row sutures was then changed as 0, 20, 40, 60, 80, and 100 N in the knotted model. RESULTS:Knotted model demonstrated more distinct stress concentration inside the tendon around medial-row sutures than the knotless model. Mean von Mises equivalent stress in this area in the 0, 20, 40, 60, 80, and 100 N models was 0.26, 0.35, 0.50, 0.70, 1.11, and 1.14 MPa, respectively. CONCLUSIONS:In the knotted TOE repair, tight medial knot tying might cause a high stress concentration around medial knots, which may constitute one of the pathogenetic factors of postoperative retearing at this site.
journal_name
Biomed Mater Engjournal_title
Bio-medical materials and engineeringauthors
Sano H,Tokunaga M,Noguchi M,Inawashiro T,Irie T,Abe H,Yokobori ATdoi
10.3233/BME-171673subject
Has Abstractpub_date
2017-01-01 00:00:00pages
267-277issue
3eissn
0959-2989issn
1878-3619pii
BME1673journal_volume
28pub_type
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