1. Highly polishing surface treatment for stem neck, distal bullet and metal ball head, and the Ra of the final surface is not more than 0.1μm.

2. In order to ensure the stability of the dimensions, the products which are sensitive to temperature , such as cup insert UHMWPE, are machined under the temperature of 20℃±2℃.

3. Ten models of stem prosthesis designs to provide more reasonable choices for operation.

4. The cross-section trapezoid design of the hip stem can match the proximal femoral medullary geometry perfectly, and improve the anti-rotation stability.

5. Plasma sprayed porous Ti coating enhances intramedullary bone ingrowth, and the pore structure can seal the proximal femur to prevent osteolysis, and it has very good long-term fixation.