A posterior stabilized orthopaedic knee prosthesis comprising: a femoral component including (i) a pair of spaced apart condyles (52, 54) defining an intracondylar notch between them, at least one of the pair of spaced apart condyles (52, 54) having a condyle surface curved in the sagittal plane and (ii) a posterior cam positioned in the intracondylar notch; and a tibial bearing including (i) a platform having a bearing surface configured to articulate with the condyle surface of the femoral component and (ii) a spine extending upwardly from the platform; the knee prosthesis being characterised in that the condyle surface of the femoral component (i) contacts the bearing surface at a first contact point on the condyle surface at a first degree of flexion, the first degree of flexion being less than about 30°, (ii) contacts the bearing surface at a second contact point on the condyle surface at a second degree of flexion, the second degree of flexion being in the range of 35° to 90°, (iii) contacts the bearing surface at a third contact point on the condyle surface at a third degree of flexion, the third degree of flexion being greater than the second degree of flexion, and (iv) contacts the bearing surface at a plurality of contact points between the first contact point and the second contact point when the femoral component is moved from the first degree of flexion to the second degree of flexion; wherein the posterior cam of the femoral component contacts the spine of the tibial bearing at a fourth degree of flexion, the fourth degree of flexion being no greater than about 10° more than the third degree of flexion; wherein each contact point of the plurality of contact points is defined by a ray extending from a common origin to the respective contact point of the plurality of contact points, each ray having a length defined by the following polynomial equation: r θ = a + b * θ + c * θ 2 + d * θ 3; wherein r θ is the length of the ray defining a contact point at θ degrees of flexion, a is a coefficient value between 20 and 50, and b is a coefficient value in a range selected from the group consisting of: -0.30 < b < 0.00, 0.0.0 < b < 0.30, and b = 0; wherein when b is in the range of -0.30 < b < 0.00, (i) c is a coefficient value between 0.00 and 0.012 and (ii) d is a coefficient value between -0.00015 and 0.00; wherein when b is in the range of 0 < b < 0.30, (i) c is a coefficient value between -0.010 and 0.00 and (ii) d is a coefficient value between -0.00015 and 0.00; and wherein when b is equal to 0, (i) c is a coefficient value in a range selected from the group consisting of: -0.0020 < c < 0.00 and 0.00 < c < 0.0025 and (ii) d is a coefficient value between -0.00015 and 0.00. a femoral component including (i) a pair of spaced apart condyles (52, 54) defining an intracondylar notch between them, at least one of the pair of spaced apart condyles (52, 54) having a condyle surface curved in the sagittal plane and (ii) a posterior cam positioned in the intracondylar notch; and a tibial bearing including (i) a platform having a bearing surface configured to articulate with the condyle surface of the femoral component and (ii) a spine extending upwardly from the platform; the knee prosthesis being characterised in that the condyle surface of the femoral component (i) contacts the bearing surface at a first contact point on the condyle surface at a first degree of flexion, the first degree of flexion being less than about 30°, (ii) contacts the bearing surface at a second contact point on the condyle surface at a second degree of flexion, the second degree of flexion being in the range of 35° to 90°, (iii) contacts the bearing surface at a third contact point on the condyle surface at a third degree of flexion, the third degree of flexion being greater than the second degree of flexion, and (iv) contacts the bearing surface at a plurality of contact points between the first contact point and the second contact point when the femoral component is moved from the first degree of flexion to the second degree of flexion; wherein the posterior cam of the femoral component contacts the spine of the tibial bearing at a fourth degree of flexion, the fourth degree of flexion being no greater than about 10° more than the third degree of flexion; wherein each contact point of the plurality of contact points is defined by a ray extending from a common origin to the respective contact point of the plurality of contact points, each ray having a length defined by the following polynomial equation: r θ = a + b * θ + c * θ 2 + d * θ 3; wherein r θ is the length of the ray defining a contact point at θ degrees of flexion, a is a coefficient value between 20 and 50, and b is a coefficient value in a range selected from the group consisting of: -0.30 < b < 0.00, 0.0.0 < b < 0.30, and b = 0; wherein when b is in the range of -0.30 < b < 0.00, (i) c is a coefficient value between 0.00 and 0.012 and (ii) d is a coefficient value between -0.00015 and 0.00; wherein when b is in the range of 0 < b < 0.30, (i) c is a coefficient value between -0.010 and 0.00 and (ii) d is a coefficient value between -0.00015 and 0.00; and wherein when b is equal to 0, (i) c is a coefficient value in a range selected from the group consisting of: -0.0020 < c < 0.00 and 0.00 < c < 0.0025 and (ii) d is a coefficient value between -0.00015 and 0.00.