KMID : 1207720090010020068
|
|
Clinics in Orthopedic Surgery 2009 Volume.1 No. 2 p.68 ~ p.73
|
|
The Influence of Tibial Positioning on the Diagnostic Accuracy of Combined Posterior Cruciate Ligament and Posterolateral Rotatory Instability of the Knee
|
|
Jung Young-Bok
Lee Yong-Seuk Ko Young-Bong Nam Chang-Hyun Jung Ho-Joong
|
|
Abstract
|
|
|
Background: To determine if tibial positioning affects the external rotation of the tibia in a dial test for posterolateral rotatory instability combined with posterior cruciate ligament (PCL) injuries.
Methods: Between April 2007 and October 2007, 16 patients with a PCL tear and posterolateral rotatory instability were diagnosed using a dial test. The thigh-foot angle was measured at both 30¡Æ and 90¡Æ of knee flexion with an external rotation stress applied to the tibia in 2 different positions (reduction and posterior subluxation). The measurements were performed twice by 2 orthopedic surgeons.
Results: In posterior subluxation, the mean side-to-side difference in the thigh-foot angle was 11.56 ¡¾ 3.01¡Æ at 30¡Æ of knee flexion and 11.88 ¡¾ 4.03¡Æ at 90¡Æ of knee flexion. In the sequential dial test performed with the tibia reduced, the mean side-to-side difference was 15.94 ¡¾ 4.17¡Æ (p < 0.05) at 30¡Æ of knee flexion and 16.88 ¡¾ 4.42¡Æ (p = 0.001) at 90¡Æ of knee flexion. The mean tibial external rotation was 5.31 ¡¾ 2.86¡Æ and 6.87 ¡¾ 3.59¡Æ higher in the reduced position than in the posterior subluxation at both 30¡Æ and 90¡Æ of knee flexion.
Conclusions: In the dial test, reducing the tibia with an anterior force increases the ability of an examiner to detect posterolateral rotary instability of the knee combined with PCL injuries.
|
|
KEYWORD
|
|
Posterolateral rotatory instability, Dial test, Thigh-foot angle
|
|
FullTexts / Linksout information
|
|
|
|
Listed journal information
|
|
|