Importance of the different posterolateral knee static stabilizers: biomechanical study
Clinics
;
65(4): 433-440, 2010. ilus, tab
Article
in English
| LILACS
| ID: lil-546318
ABSTRACT
PURPOSE:
The purpose of this study was to evaluate the relative importance of the different static stabilizers of the posterolateral corner of the knee in cadavers.METHODS:
Tests were performed with the application of a varus and external rotation force to the knee in extension at 30 and 60 degrees of flexion using 10 cadaver knees. The forces were applied initially to an intact knee and then repeated after a selective sectioning of the ligaments into the following section of the lateral collateral ligament; section of the lateral collateral ligament and the popliteofibular complex; and section of the lateral collateral ligament, the popliteofibular complex and the posterolateral capsule. The parameters studied were the angular deformity and stiffness when the knees were submitted to a 15 Newton-meter varus torque and a 6 Newton-meter external tibial torque. Statistical analysis was performed using the ANOVA (Analysis of Variance) and Tukey's tests. RESULTS ANDCONCLUSION:
Our findings showed that the lateral collateral ligament was important in varus stability at 0, 30 and 60 degrees. The popliteofibular complex was the most important structure for external rotation stability at all angles of flexion and was also important for varus stability at 30 and 60 degrees. The posterolateral capsule was important for varus stability at 0 and 30 degrees and for external rotation stability in extension. Level of evidence Level IV (cadaver study).
Full text:
Available
Index:
LILACS (Americas)
Main subject:
Medial Collateral Ligament, Knee
/
Joint Instability
/
Knee Joint
Limits:
Adult
/
Aged
/
Female
/
Humans
/
Male
Language:
English
Journal:
Clinics
Journal subject:
Medicine
Year:
2010
Type:
Article
Affiliation country:
Brazil
Institution/Affiliation country:
Faculdade de Ciências Médicas de Minas Gerais/BR
/
Instituto de Ortopedia e Traumatologia de Roortopedia Porto Velho/BR
/
Universidade de São Paulo/BR
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