Uhmpe tibial spacer for increased friction resistance. The design of a smooth circular arc notch at the front of the gasket column avoids patella impingement syndrome at high buckling. The circular arc treatment behind the gasket column can improve the internal and external rotation of tibial joint and increase the contact area and stability during high buckling. The surface is designed with spherical radian to obtain larger shape rounding and increase the degree of freedom of rotation.