Publication details

Authors: Fisher, M. B.; Jung, H. J.; McMahon, P. J.; Woo, S. L. 
Title: Evaluation of bone tunnel placement for suture augmentation of an injured anterior cruciate ligament: effects on joint stability in a goat model 
Type: Journal Article 
Publisher: Journal of Orthopaedic Research 
Year: 2010 
Volume: 28 
Issue: 10 
Start Page: 1373 
End Page: 1379 
DOI: 10.1002/jor.21141 
Abstract: Use of novel tissue engineering approaches to heal an injured anterior cruciate ligament (ACL) requires suture repair and/or augmentation to provide joint stability. We evaluated the effects of the location of suture augmentation at the femur and tibia in terms of joint stability using a goat model. Eight goat stifle joints were tested with augmentation sutures placed in two femoral tunnel locations: (1) anterior to, or (2) through the ACL footprint, and two tibial tunnel locations: (1) medial to, or (2) medial and lateral to the footprint. Using a robotic/universal force-moment sensor testing system, the anterior tibial translation (ATT) and the corresponding in situ force carried by the sutures were obtained at 30 degrees , 60 degrees , and 90 degrees of flexion in response to external loads. No significant differences were found between augmentation groups due to tunnel location in terms of ATT or the in situ forces carried by the sutures at all flexion angles tested. Similar results were found under 5 N m of varus-valgus torque. Under a 67 N anterior tibial load, the ATT was restored to within 3 mm of the intact joint following suture augmentation (p > 0.05). Suture augmentation, when placed close to the ACL insertion, could be helpful in providing initial joint stability to aid ACL healing in the goat model. 
Keywords: Animals, Anterior Cruciate Ligament/physiopathology/*surgery, *Anterior Cruciate Ligament Injuries, Biomechanical Phenomena, Goats, Joint Instability/physiopathology/*surgery, Knee Joint/physiopathology/*surgery, Male, Models, Animal, Range of Motion, Articular/physiology, *Suture Techniques, Treatment Outcome 
File:  (123K)