TITLE

A Biomechanical Comparison of Single and Double-Row Fixation in Arthroscopic Rotator Cuff Repair

AUTHOR(S)
Smith, Christopher D.; Alexander, Susan; Hill, Adam M.; Huijsmans, Pol E.; Bull, Anthony M. J.; Amis, Andrew A.; De Beer, Joe F.; Wallace, Andrew L.
PUB. DATE
November 2006
SOURCE
Journal of Bone & Joint Surgery, American Volume;Nov2006, Vol. 88-A Issue 11, p2435
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Background: The optimal method for arthroscopic rotator cuff repair is not yet known. The hypothesis of the present study was that a double-row repair would demonstrate superior static and cyclic mechanical behavior when compared with a single-row repair. The specific aims were to measure gap formation at the bone-tendon interface under static creep loading and the ultimate strength and mode of failure of both methods of repair under cyclic loading. Methods: A standardized tear of the supraspinatus tendon was created in sixteen fresh cadaveric shoulders. Arthroscopic rotator cuff repairs were performed with use of either a double-row technique (eight specimens) or a single-row technique (eight specimens) with nonabsorbable sutures that were double-loaded on a titanium suture anchor. The repairs were loaded statically for one hour, and the gap formation was measured. Cyclic loading to failure was then performed. Results: Gap formation during static loading was significantly greater in the single-row group than in the double-row group (mean and standard deviation, 5.0 ± 1.2 mm compared with 3.8 ± 1.4 mm; p < 0.05). Under cyclic loading, the double-row repairs failed at a mean of 320 ± 96.9 N whereas the single-row repairs failed at a mean of 224 ± 147.9 N (p = 0.058). Three single-row repairs and three double-row repairs failed as a result of suture cut-through. Four single-row repairs and one double-row repair failed as a result of anchor or suture failure. The remaining five repairs did not fail, and a midsubstance tear of the tendon occurred. Conclusions: Although more technically demanding, the double-row technique demonstrates superior resistance to gap formation under static loading as compared with the single-row technique. Clinical Relevance: A double-row reconstruction of the supraspinatus tendon insertion may provide a more reliable construct than a single-row repair and could be used as an alternative to open reconstruction for the treatment of isolated tears.
ACCESSION #
23113240

 

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