Table I.

Description of implant variants tested; where mechanical properties of the proximal tibia have been matched, values were taken from existing literature. ²⁶ T0 to T4 refer to total knee arthroplasty designs. M0 to M4 refer to medial unicondylar knee arthroplasty designs.

Implant	Description	Mechanical modulus
T0, M0	Conventional solid implant	EAxial = 113 GPa
T1, M1	Uniform axial modulus matched to the mean value in the proximal tibia	EAxial = 0.6 GPa
T2, M2	Uniform axial and transverse modulus matched to the mean value in the proximal tibia	EAxial = 0.6 GPa ETransverse = 0.45 GPa
T3, M3	Uniform axial modulus set similar to that in the proximal tibia	EAxial = 3.3 GPa
T4, M4	Graded axial modulus graded across the implant to replicate differences found across native condyles and subchondral depth, with a solid cortical rim	EAxial = 0.4 to 0.7 GPa