Cementless femoral stem BB1

1. Can match different types medullary cavity; 2. Adjustable anteversion angle, cope with complicated conditions during surgery and reduce the risk of dislocation; 3. 3D printing bone trabecular structure + HA coating, the proximal end is 3D printing bone trabecular structure, high porosity, surface hydroxyapatite (HA) Spray, induce bone ingrowth (3D+HA); 4. Distal rack, anti-rotation, 8 small racks/grooves at the distal end of the femoral stem. Advantages: racks/grooves bite into the cortex, anti-torque, anti-rotation when implanation; 5. Increase the middle number, 1mm increments; 6. Longer stem, suitable for osteotomy under small trochanter, more stable; 7. Increase the R arc to reduce stress concentration. The enlarged R arc on the inner side of the proximal femoral stem reduces stress concentration and lowers the risk of breakage of the femoral stem; 8. The "clothespin" shaped coronal groove reduces the hardness of the distal end of the stem, reduces the influence of the mismatch, and reduces the occurrence of thigh pain/fracture.