A total knee replacement is not a normal knee. Our goal was to design a total knee replacement (TKR) that maintains A/P stability and allows total knee axial rotation to reduce contact stresses on the polyethylene, therefore reducing wear.
The 3DKnee:
- Allows PCL preservation.
- Conformity and high anterior lip of the tibial insert for use without the PCL.
- Provides A/P stability similar to the intact ACL and PCL with anatomic surface shapes. [9]
- Allows for normal total knee axial rotations, without imposing undue implant constraint.
- Fixed bearing implant allows femoral roll-back without an additional wear surface as with a mobile bearing knee.
- Allows deep flexion with a posterior set sulcus and flexion-friendly posterior condyles.
Fig. 10. The insert obtains maximal contact surface to minimize poly wear, and controls excessive anterior/posterior tibial-femoral motions while permitting free axial rotations.
It also allows PCL preservation and
provides A/P stability similar to ACL deficient valgus knees that develop a concave lateral compartment [9].