knee joint 3d model

Create a modular, 3D-printable human knee joint model for medical demonstration of Total Knee Replacement. Include distal femur, proximal tibia, femoral implant, tibial baseplate, and polyethylene insert as separate parts with realistic anatomy and alignment. Design precise snap-fit connections for all components: Femoral Implant to Femur: Dual pegs (6 mm diameter, 12 mm length) Holes with 0.25–0.3 mm clearance Snap retention ring (0.4 mm height, 1 mm width) Vertical flex slot (1.2 mm width, 8 mm depth) Tibial Baseplate to Tibia: Central stem (8 mm diameter, 14 mm length) Hole with 0.3 mm clearance Anti-rotation key (3 mm width, 1.5 mm depth) Poly Insert to Baseplate: Slide rails (2.5 mm width, 1.5 mm height) Grooves with 0.2 mm clearance Snap tab (0.5 mm height, 1 mm thick, 6 mm length) Functional: Fully detachable parts 0.3–0.5 mm articulation gap Durable, no thin fragile features Style: clean, realistic, slightly simplified, smooth fillets. Output separate, aligned parts