Journal Published Online: 03 August 2010
Volume 7, Issue 8

Relative Motion of ACL Insertion Points In Vivo: A Case Study, Including Skiing Maneuvers

CODEN: JAIOAD

Abstract

FASTRAK receivers were mounted on Kirschner-wires inserted in the distal femur and proximal tibia, respectively. Relative motions of the anterior cruciate ligament (ACL) insertion points were calculated for a hypothesised ACL while diagnostic and skiing load cases were applied to the knee. The highest strains, in descending order were: (i) Lachman test (13.5 %), (ii) 20 N•m internal rotation load (10.6 %) and (iii) latero-medial knee movement (6.4 %). The Lachman-procedure not only produces anterior tibial translation (5.5 mm) but as well internal rotation (10.0°). The medial knee movement produces valgus (2.3°) and external rotation (15.6°), but induces flexion (9.7°) as well, which therefore increases ACL load due to a non physiological instantaneous centre of rotation.

Author Information

Freudiger, Stefan
Ingenieurbüro Flugwesen und Biomechanik IFB AG, Bremgarten, Switzerland
Vogt, Wolfgang
Orthopädisches Fachzentrum OFZ
Wirz, Dieter
Labor für orthopädische Biomechanik, Universität Basel, Klingelbergstrasse 50–70, CH-4056 Basel, Switzerland
Pages: 9
Price: $25.00
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Details
Stock #: JAI102831
ISSN: 1546-962X
DOI: 10.1520/JAI102831