Hip Joint Hemiarthroplasty System
Components: biopolar cup &insert & pressfit ring & metal ball head & bone cemented stem.
Raw Material: use ISO 5832-4 cast CoCrMo alloy or ISO 5812-12 wrought CoCrMo alloy for biopolar cup, bone cemented stem and metal bal head; use ISO 5834-2 UHMWPE for insert and pressfit ring.
1.Highly polishing surface treatment for biopolar cup, bone cemented stem 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 the insert and the pressfit ring, are machined under the temperature of 20℃±2℃ .
3. Seven 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 medulary geometry perfectly, and improve the anti-rotation stability.