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Journal of Bone and Joint Surgery - British Volume, Vol 90-B, Issue 10, 1386-1391.
doi: 10.1302/0301-620X.90B10.20862  
Copyright © 2008 by British Editorial Society of Bone and Joint Surgery
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A comparison of single-versus double-row suture anchor techniques in a simulated repair of the rotator cuff

AN EXPERIMENTAL STUDY IN RABBITS

M. Ozbaydar, MD, Orthopaedic Surgeon1; B. Elhassan, MD, Assistant Professor2; C. Esenyel, MD, Orthopaedic Surgeon3; A. Atalar, MD, Orthopaedic Surgeon4; E. Bozdag, PhD, Researcher5; E. Sunbuloglu, MSc, Researcher5; N. Kopuz, MD, Pathologist6; and M. Demirhan, MD, Professor4

1 Department of Orthopaedics and Traumatology, Okmeydani Teaching Hospital, 34387, Okmeydani, Istanbul, Turkey.
2 Mayo Clinic, 200 First Street, Rochester, Minnesota 55905, USA.
3 Department of Orthopaedics and Traumatology, Vakif Gureba Teaching Hospital, 34093, Fatih, Istanbul, Turkey.
4 Department of Orthopaedics and Traumatology, Istanbul University, Istanbul School of Medicine, 34390, Capa, Istanbul, Turkey.
5 Department of Medical Engineering, Istanbul Technical University, 34437, Güssüssuyu, Istanbul, Turkey.
6 Department of Pathology, Istanbul University, Cerrahpasa Medical Faculty, 34098, Fatih, Istanbul, Turkey.

Correspondence should be sent to Dr M. Ozbaydar; e-mail: mehmetozbaydar{at}hotmail.com

We compared time-dependent changes in the biomechanical properties of single-and double-row repair of a simulated acute tear of the rotator cuff in rabbits to determine the effect of the fixation techniques on the healing process.

A tear of the supraspinatus tendon was created in 80 rabbits which were separated into two equal groups. A single-row repair with two suture anchors was conducted in group 1 and a double-row repair with four suture anchors in group 2. A total of ten intact contralateral shoulder joints was used as a control group. Biomechanical testing was performed immediately post-operatively and at four and eight weeks, and histological analysis at four and eight weeks.

The mean load to failure in group 2 animals was greater than in group 1, but both groups remained lower than the control group at all intervals. Histological analysis showed similar healing properties at four and eight weeks in both groups, but a significantly larger number of healed tendon-bone interfaces were identified in group 2 than in group 1 at eight weeks (p < 0.012).

The ultimate load to failure increased with the number of suture anchors used immediately post-operatively, and at four and eight weeks. The increased load to failure at eight weeks seemed to be related to the increase in the surface area of healed tendon-to-bone in the double-row repair group.




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 J Bone Joint Surg BrHome page
B. C. Hanusch, L. Goodchild, P. Finn, and A. Rangan
Large and massive tears of the rotator cuff: FUNCTIONAL OUTCOME AND INTEGRITY OF THE REPAIR AFTER A MINI-OPEN PROCEDURE
J Bone Joint Surg Br, February 1, 2009; 91-B(2): 201 - 205.
[Abstract] [Full Text] [PDF]


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Hip, Knee, Trauma, Upper limb, Foot & Ankle, Paediatrics, Oncology, Spine, Arthroplasty, General