Primary: The primary objective of this pilot study is to compare the intraarticular kinematics by fluoroscopy of Vanguard XP to that of Vanguard CR. Secondary: The secondary objective of this pilot study is to compare the standing balance by force plate of patients with the Vanguard XP prosthesis to those who have Vanguard CR prosthesis. Furthermore, we wish to assess isometric quadriceps muscle strength in both groups.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
SINGLE
Dept. of Orthopaedic Surgery, Copenhagen University Hospital Hvidovre
Hvidovre, Denmark
Anterior-posterior translation of the femoral component with respect to the tibia component
Group mean in millimeters (mm)
Time frame: at least one year post surgery
Axial rotation of the femoral component with respect to the tibia component
Group mean in degrees (°)
Time frame: at least one year post surgery
Traveled distance of center of pressure
Group mean in centimeters (cm)
Time frame: at least one year post surgery
Velocity of center of pressure
Group mean in mm/second
Time frame: at least one year post surgery
Rambling-trembling distance
Group mean in mm
Time frame: at least one year post surgery
Isometric quadriceps muscle strength
Group mean in newton meter pr. kilograms weight (Nm/kg)
Time frame: at least one year post surgery
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