Increasing the insertion depth of suture anchors for rotator cuff repair does not improve biomechanical stability

The purpose of this study was to evaluate whether deeper-than-recommended insertion of a suture anchor within the rotator cuff footprint of human cadaveric humeri affects fixation characteristics. Metallic 5-mm screw-in anchors loaded with a single No. 2 suture were placed in the infraspinatus footp...

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Bibliographic Details
Published in:Journal of shoulder and elbow surgery 2005-11, Vol.14 (6), p.626-630
Main Authors: Mahar, Andrew T., Tucker, Bradford S., Upasani, Vidyadhar V., Oka, Richard S., Pedowitz, Robert A.
Format: Article
Language:English
Subjects:
Aged
Aged, 80 and over
Biological and medical sciences
Biomechanical Phenomena
Bone Screws
Cadaver
Diseases of the osteoarticular system
Female
Humans
Male
Medical sciences
Rotator Cuff - surgery
Rotator Cuff Injuries
Stress, Mechanical
Suture Techniques
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Summary:The purpose of this study was to evaluate whether deeper-than-recommended insertion of a suture anchor within the rotator cuff footprint of human cadaveric humeri affects fixation characteristics. Metallic 5-mm screw-in anchors loaded with a single No. 2 suture were placed in the infraspinatus footprint of 8 human cadaveric humeri at standard and deep depths. Specimens were cyclically loaded from 10 to 45 N for 500 cycles and then loaded to failure. Cylic displacement, failure load, and failure mode were compared. All deep anchors became flush within a few cycles, and both anchor depths displaced and rotated at the bone surface. Displacement of the deep anchors was significantly greater than that of standard anchors. There was no difference in failure load. Cyclic testing showed significant displacement, regardless of anchor position, possibly leading to gap formation of the repair. Deep placement of suture anchors for increased purchase caused greater displacement and is not recommended.
ISSN:1058-2746
1532-6500
DOI:10.1016/j.jse.2005.03.011