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Evaluation of the mechanical properties of posterolateral structures and supporting posterolateral instability of the knee.

Authors
 Yong-Min Chun  ;  Sung-Jae Kim  ;  Hyoung-Sik Kim 
Citation
 JOURNAL OF ORTHOPAEDIC RESEARCH, Vol.26(10) : 1371-1376, 2008 
Journal Title
 JOURNAL OF ORTHOPAEDIC RESEARCH 
ISSN
 0736-0266 
Issue Date
2008
MeSH
Aged ; Aged, 80 and over ; Biomechanical Phenomena ; Cadaver ; Humans ; Joint Instability/physiopathology* ; Knee Joint/physiopathology ; Knee Joint/surgery* ; Ligaments, Articular/physiopathology ; Ligaments, Articular/surgery* ; Medial Collateral Ligament, Knee/physiopathology ; Medial Collateral Ligament, Knee/surgery ; Osteotomy/methods ; Range of Motion, Articular ; Rotation ; Tibia/physiopathology ; Tibia/surgery ; Torque
Keywords
popliteofibular ligament ; popliteus tendon ; lateral (fibular) collateral ligament ; external rotatory laxity ; varus laxity
Abstract
The objectives of this study are to evaluate the contributions of the popliteofibular ligament (PFL), the popliteus tendon (PT), and the lateral (fibular) collateral ligament (LCL) to the posterolateral stability of the knee by changing the sequence of selective transection. Twelve fresh-frozen cadaveric knees were divided into two groups. Group 1 has a cutting sequence as follows: PFL, PT, LCL. Group 2 has a cutting sequence as follows: PT, PFL, LCL. Each specimen was mounted on the apparatuses using the Ilizarov external fixator for measuring external rotatory and varus laxities at every 30 degrees from 0 degrees to 90 degrees of knee flexion. In both groups, there was no significant difference between the PFL and PT in the increment of respective external rotatory laxity after transection at each knee flexion angle, except 0 degrees in group 2. The transection of the LCL significantly increased the external rotation laxity at 0 degrees and 30 degrees . Varus instability was increased significantly only after cutting the LCL at every knee flexion angle. In conclusion, both the PFL and PT equally contribute to the external rotatory stability. The LCL also contributes to the external rotatory stability at early range of knee flexion. The LCL is a main structure for varus stability in the knee.
Full Text
http://onlinelibrary.wiley.com/doi/10.1002/jor.20596/abstract
DOI
10.1002/jor.20596
Appears in Collections:
1. College of Medicine (의과대학) > Dept. of Orthopedic Surgery (정형외과학교실) > 1. Journal Papers
Yonsei Authors
Kim, Sung Jae(김성재)
Kim, Hyoung Sik(김형식) ORCID logo https://orcid.org/0000-0002-9303-4116
Chun, Yong Min(천용민) ORCID logo https://orcid.org/0000-0002-8147-6136
URI
https://ir.ymlib.yonsei.ac.kr/handle/22282913/106483
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