Dynamische computer tomografie voor de beoordeling van de knie rotatie instabiliteit na posterior-lateraal hoekletsel.

Rationale: Posterolateral corner (PLC) injury is one of the most serious knee injuries in the young athlete. The PLC provides stability of the knee in rotation and varus stress. The reconstruction of the PLC complies two main goals, namely restoration of varus stability and restoration of rotational stability. Though, we cannot measure the rotational stability of the knee reliable for there is currently no reliable technique available. New generation Computed Tomography (CT) scanners (dynamic-CT) make it possible to assess moving joints in a quantitative manner. This technique might provide essential information of knee rotational stability before and in a later stage after PLC reconstruction and hereby, possibly prediction of patient satisfaction after PLC repair.


Objective: To assess the rotational stability of the knee using dynamic-CT scanning.


Study design: A feasibility study / pilot study. It will be a cross-sectional design, using the contralateral knee as control group (reference). A dynamic-CT scan will be performed of the injured as well as the uninjured knee to assess the differences in rotations.


Study population: 10 patients planned for PLC reconstruction surgery, with a unilateral symptomatic PLC deficiency will be included, 18-50 years of age.


Intervention: All participants will undergo one dynamic-CT scans of each knee, left and right, prior to PLC reconstruction.
Main study parameters/endpoints: Degrees of rotation (femur versus tibia) of the injured versus the uninjured knee. Is it possible to measure the present different using a dynamic-CT scan.

one time point: preoperatively

There will be no additional or altered treatment of the subjects. One dynamic-CT scan (diagnostic) of each knee will be performed.