The Influence of Tibial Positioning on the Diagnostic Accuracy of Combined Posterior Cruciate Ligament and Posterolateral Rotatory Instability of the Knee
Clinics in Orthopedic Surgery
;
: 68-73, 2009.
Article
in English
| WPRIM
| ID: wpr-69283
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 30degrees and 90degrees 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 +/- 3.01degrees at 30degrees of knee flexion and 11.88 +/- 4.03degrees at 90degrees of knee flexion. In the sequential dial test performed with the tibia reduced, the mean side-to-side difference was 15.94 +/- 4.17degrees (p < 0.05) at 30degrees of knee flexion and 16.88 +/- 4.42degrees (p = 0.001) at 90degrees of knee flexion. The mean tibial external rotation was 5.31 +/- 2.86degrees and 6.87 +/- 3.59degrees higher in the reduced position than in the posterior subluxation at both 30degrees and 90degrees 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.
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Physical Examination
/
Tibia
/
Biomechanical Phenomena
/
Posterior Cruciate Ligament
/
Range of Motion, Articular
/
Joint Instability
/
Knee Joint
Type of study:
Diagnostic study
Limits:
Adolescent
/
Adult
/
Female
/
Humans
/
Male
Language:
English
Journal:
Clinics in Orthopedic Surgery
Year:
2009
Type:
Article
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