An adjustable, temporary device that exerts spacing force through a pair of identical lattices to increase the distance between the distal femur and proximal tibia. Pairs of lattices are connected to a femoral and a tibial base plate by connections to lift anchors. A pair of connector rods joins the lattices the drive rod that includes a travel block functionally joins the connector rods. The threaded length of drive rod engages the threaded chase of the travel block and the smooth second end engages the smooth chase of the static block. The chases are aligned at a right angle to the anchor rods. Rotating the anchor rod moves the travel block so that a forces is exerted on the lattices. Rotating the drive rod increases the length of the lattices and the distance between the femur and tibia which is expressed as increased tension on the ligaments and soft tissue of the knee. The device may include a measuring tape housing with a flexible tape. When the surgeon determines by manipulation of the knee joint that the optimum tension has been reached, the distance is measured and the optimum thickness of the permanent spacer is established.
