One- and two-incision anterior cruciate ligament reconstruction: a biomechanical comparison including the effect of simulated closed-chain exercise

Arthroscopy : the Journal of Arthroscopic & Related Surgery : Official Publication of the Arthroscopy Association of North America and the International Arthroscopy Association
P G DalldorfD M Lintner

Abstract

The purpose of this study was to evaluate the effect of simulated closed-chain exercise on anterior translation in the anterior cruciate ligament (ACL) reconstructed knee comparing patellar tendon grafts secured with endoscopic and two-incision techniques. ACL reconstructions, were performed on five matched pairs of fresh frozen cadaver lower extremities. One of each pair had endoscopic (inside-out) placement of the femoral interference screw and other had outside-in femoral screw placement. A model for closed-chain exercise was developed to simulate half squat exercises using a custom apparatus on the Material Testing machine with a 356 N (80 lb) axial load and 40 N (9 lb) static hamstring force. Knee motion from near full extension to 60 degrees flexion was achieved by varying the quadricep force. One thousand squats were performed, and KT-1000 arthometry was done before and after cycling each specimen. The femur-graft-tibia constructs were then stressed to failure. Closed-chain cycling resulted in no significant change in anterior translation in either group. The mean maximum load to failure of the femur-graft-tibia construct was 340.4N in the one-incision group and 434.2 N in the two-incision group. P=.048 was considered st...Continue Reading

Citations

Jan 17, 2003·The Orthopedic Clinics of North America·Thomas J Gill, J Richard Steadman
Jun 1, 2016·The Journal of the American Academy of Orthopaedic Surgeons·Aman DhawanScott A Lynch
Oct 12, 2000·Arthroscopy : the Journal of Arthroscopic & Related Surgery : Official Publication of the Arthroscopy Association of North America and the International Arthroscopy Association·P T SimonianJ W O'kane
Jul 17, 1999·Scandinavian Journal of Medicine & Science in Sports·J KarlssonB I Eriksson
Feb 13, 2003·Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine·D J Beevers

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