The ultrasonographic evaluation of the posterior cruciate ligament length before and after training in patients with posterior knee instability – preliminary report

Elizabeta Popova Ramova, Anastasika Poposka


Summary: The posterior cruciate ligament (PCL) has an important role in stabilization and kinematics of knee. The aim
of this study is to evaluate by ultrasonography the changes in length of the PCL during the rehabilitation programs in patients
with posterior instable knees treated conservatively. Material and method: Ultrasonographic examination was performed in
16 patients with unilateral posterior knee instability treated by conservative therapy. The length of the PCL was measured.
The control group was represented by the normal contralateral knee (group A). The patients were evaluated before starting the
treatment (group B), after a month (group C), and after 6 months (group D) of rehabilitation therapy. Results: The average
length of the PCL was 39.87± 6.1 mm in group A, 46.8±7.9 mm in group B, 43.9± 7.5 mm in group C, and 40.36±6.2 mm
in group D. There were signifi cant differences of the PCL length between group A and group B (p<0.01), group A and group
D (p<0.01) and between group B and group D (p<0.05). No statistical difference was found between group C and group D
(p>0.05). Stability of knee was in correlation with decrease of PLC measured size. Conclusion: The most important period for
ligament recovery is the fi rst month of therapy. Ultrasonography can be used for the evaluation of the effects of rehabilitation


ultrasonography; posterior cruciate ligament; rehabilitation therapy.

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