HOME HELP CONTACT US SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:
Sign In to gain access to subscriptions and/or personal tools.

This Article Full Text Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Citation Map Services Email this article to a friend Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Request Permissions Request Reprints Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Google Scholar Articles by Selby, J. B. Articles by Caborn, D. N.M. Search for Related Content PubMed PubMed Citation Articles by Selby, J. B. Articles by Caborn, D. N.M. Related Collections Reconstruction Biomechanics Graft fixation

Effect of Screw Length on Bioabsorbable Interference Screw Fixation in a Tibial Bone Tunnel

Jeffrey B. Selby, MD, Darren L. Johnson, MD, Peter Hester, MD and David N.M. Caborn, MD

University of Kentucky School of Medicine, Lexington, Kentucky

Presented at the interim meeting of the AOSSM, Orlando, Florida, March 2000.

Address correspondence and reprint requests to David N. M. Caborn, MD, Department of Orthopaedic Surgery, University of Kentucky School of Medicine, K401 Kentucky Clinic, Lexington, KY 40536-0284

Initial tibial fixation strength is the weak link after anterior cruciate ligament reconstruction with a quadrupled hamstring tendon graft fixed with bioabsorbable interference screws. The purpose of this study was to determine the biomechanical differences between 28-mm and tapered 35-mm interference screws for tibial fixation of a soft tissue graft in 16 young cadaveric tibias. Failure mode, displacement before failure, and ultimate failure load were tested with a testing machine aligned with the tibial tunnel to simulate a worst-case scenario. The mode of failure was graft slippage past the screw in all but one of the specimens. The mean maximum load at failure of the 28-mm screw was 594.9 ± 141.0 N, with mean displacement at failure of 10.97 ± 2.20 mm. The mean maximum load at failure of the 35-mm screw was 824.9 ± 124.3 N, with a mean displacement to failure of 14.38 ± 2.15 mm. The 38% difference in mean maximal load at failure was significant. Important variables in hamstring tendon graft fixation within a bone tunnel include bone mineral density, dilatation, gap size, screw placement, and screw width and length. Attention to these variables will help to provide secure graft fixation during biologic incorporation throughout the rehabilitation period.

This article has been cited by other articles:

				J. M. Cottom, C. F. Hyer, G. C. Berlet, and T. H. Lee Flexor Hallucis Tendon Transfer With an Interference Screw for Chronic Achilles Tendinosis: A Report of 62 Cases Foot & Ankle Specialist, October 1, 2008; 1(5): 280 - 287. [Abstract] [PDF]

				B. S. Dunkin, J. Nyland, A. R. Duffee, J. A. Brunelli, R. Burden, and D. Caborn Soft Tissue Tendon Graft Fixation in Serially Dilated or Extraction-Drilled Tibial Tunnels: A Porcine Model Study Using High-Resolution Quantitative Computerized Tomography Am. J. Sports Med., March 1, 2007; 35(3): 448 - 457. [Abstract] [Full Text] [PDF]

				O. Kilicoglu, O. Koyuncu, M. Demirhan, C. Z. Esenyel, A. C. Atalar, S. Ozsoy, E. Bozdag, E. Sunbuloglu, and B. Bilgic Time-Dependent Changes in Failure Loads of 3 Biceps Tenodesis Techniques: In Vivo Study in a Sheep Model Am. J. Sports Med., October 1, 2005; 33(10): 1536 - 1544. [Abstract] [Full Text] [PDF]

				H. C. Chang, J. Nyland, A. Nawab, R. Burden, and D. N. M. Caborn Biomechanical Comparison of the Bioabsorbable RetroScrew System, BioScrew XtraLok With Stress Equalization Tensioner, and 35-mm Delta Screws for Tibialis Anterior Graft-Tibial Tunnel Fixation in Porcine Tibiae Am. J. Sports Med., July 1, 2005; 33(7): 1057 - 1064. [Abstract] [Full Text] [PDF]

				L. Jeys, S. Korrosis, T. Stewart, and N. J. Harris Bone Anchors or Interference Screws?: A Biomechanical Evaluation for Autograft Ankle Stabilization Am. J. Sports Med., October 1, 2004; 32(7): 1651 - 1659. [Abstract] [Full Text] [PDF]

				J. T. Nurmi, H. Sievanen, P. Kannus, M. Jarvinen, and T. L. N. Jarvinen Porcine Tibia Is a Poor Substitute for Human Cadaver Tibia for Evaluating Interference Screw Fixation Am. J. Sports Med., April 1, 2004; 32(3): 765 - 771. [Abstract] [Full Text] [PDF]

				P. Kousa, T. L. N. Jarvinen, M. Vihavainen, P. Kannus, and M. Jarvinen The Fixation Strength of Six Hamstring Tendon Graft Fixation Devices in Anterior Cruciate Ligament Reconstruction: Part I: Femoral Site Am. J. Sports Med., March 1, 2003; 31(2): 174 - 181. [Abstract] [Full Text] [PDF]

				P. Kousa, T. L. N. Jarvinen, M. Vihavainen, P. Kannus, and M. Jarvinen The Fixation Strength of Six Hamstring Tendon Graft Fixation Devices in Anterior Cruciate Ligament Reconstruction: Part II: Tibial Site Am. J. Sports Med., March 1, 2003; 31(2): 182 - 188. [Abstract] [Full Text] [PDF]