Document Detail

Graft tension of the posterior cruciate ligament using a finite element model.
MedLine Citation:
PMID:  23851970     Owner:  NLM     Status:  Publisher    
PURPOSE: The aim of the study was to analyse the change in length and tension of the reconstructed single-bundle posterior cruciate ligament (PCL) with three different femoral tunnels at different knee flexion angles by use of three-dimensional finite element method.
METHODS: The right knees of 12 male subjects were scanned with a high-resolution computed tomography scanner at four different knee flexion angles (0°, 45°, 90° and 135°). Three types of single-bundle PCL reconstruction were then conducted in a 90° flexion model: femoral tunnels were created in anterolateral (AL), central and posteromedial (PM) regions of the footprint. Length versus flexion curves and tension versus flexion curves were generated.
RESULTS: Between 0° and 90° of knee flexion, changes in length and tension in the PM grafts were not significant. Whereas the lengths and tension of the AL and central grafts significantly increased in the same flexion range. The length and tension of the PM grafts at 135° of knee flexion were significantly higher than those at 90° of knee flexion, whereas the AL and the central grafts showed only slight length changes beyond 90° of flexion. However, the tension of the AL graft increased significantly beyond 90° of flexion.
CONCLUSIONS: Changes in the graft length, and tension were generally affected by different femoral tunnels and knee flexion angles. In groups with the AL and PM single-bundle reconstruction, the graft tension increased beyond 90° of knee flexion when the graft is tensioned at 90° of flexion. These data suggest that final fixation angle at 90° for the AL or PM graft would induce graft overtension in high knee flexion of 135°. Whereas central graft which is fixed in 90° of flexion is desirable in terms of prevention of graft overtension. Because the graft tension within it was relatively constant beyond 90° of flexion.
Young-Jin Seo; Si Young Song; In Sung Kim; Myeong Jae Seo; Yoon Sang Kim; Yon-Sik Yoo
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2013-7-14
Journal Detail:
Title:  Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA     Volume:  -     ISSN:  1433-7347     ISO Abbreviation:  Knee Surg Sports Traumatol Arthrosc     Publication Date:  2013 Jul 
Date Detail:
Created Date:  2013-7-15     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9314730     Medline TA:  Knee Surg Sports Traumatol Arthrosc     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Department of Orthopedic Surgery, Hallym University Medical Center, Dongtan, Gyunggido, Korea.
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