Product Details
HRSK Rotating Hinge Knee System: Optimized Design by China Factory Suppliers for Seamless Biomechanical Adaptation
Special Description
Modular sleeves provide Intra-operative flexibility by accommodating bone defects of the Engh Type II and Type II.
Highly polished upper surface reduces postoperative wear.
Augments with 187 Specifications
Are available for patients with inadequate bone stock.
Tibial Augment
Deepened and extended trochlear groove
Reduces patellar force throughout the range of motion.
Alleviates patellar subluxation and dislocation.
The hinge mechanism of modularity
• Stress transmission is buffered, significantly reducing cement-bone interface loosening.
• The hinge structure prevents direct contact between the metal hinge axis and the metal femoral condyle, minimizing wear.
• Designed so that 95% of the load is borne by the tibia, aligning with the load distribution of primary prostheses; gravity and joint surface stress are primarily supported by the tibiofemoral joint surface.
Design of the tibiofemoral anastomosis
• High compatibility ensures direct contact between the femoral condyle and tibial insert throughout the entire range of flexion and extension, allowing for effective load-bearing.
• The well-matched tibiofemoral joint surface also provides damping constraints at extreme flexion and extension positions: During prosthetic hyperextension, the anterior curvature of the HRSK comes into contact with the tibial joint surface. This interaction slightly separates the knee joint, preventing hyperextension impact. This design is intended to protect against hyperextension.
Special Instrumentation
HRSK® Femoral Condyle
| Material | Spec (mm) | A/P (mm) | M/L (mm) |
|---|---|---|---|
| CoCrMo | 2# R/L | 57 | 61 |
| 3# R/L | 59 | 64 | |
| 4# R/L | 61 | 66 | |
| 5# R/L | 63 | 68 | |
| 6# R/L | 66 | 71 |
HRSK® Tibial Bearing (PS)
| Material | Spec (mm) | A/P (mm) | M/L (mm) |
|---|---|---|---|
| Germany UHMWPE | 2# 14mm, 16mm, 18mm, 20mm, 22mm | 41 | 63 |
| 3# 14mm, 16mm, 18mm, 20mm, 22mm | 43 | 67 | |
| 4# 14mm, 16mm, 18mm, 20mm, 22mm | 46 | 63 | |
| 5# 14mm, 16mm, 18mm, 20mm, 22mm | 48 | 67 | |
| 6# 14mm, 16mm, 18mm, 20mm, 22mm | 51 | 79 |
HRSK® Tibial Tray
| Material | Spec (mm) | A/P (mm) | M/L (mm) |
|---|---|---|---|
| CoCrMo | 2# | 41 | 63 |
| 3# | 43 | 67 | |
| 4# | 46 | 71 | |
| 5# | 48 | 75 | |
| 6# | 51 | 79 |
Video
Technology Education
Frequently Asked Questions
What is the clinical benefit of the modular sleeves in the HRSK® system?
Modular sleeves provide intra-operative flexibility for surgeons by accommodating bone defects of the Engh Type II and Type II classifications, ensuring a more stable and customized implant fit.
How does the hinge mechanism reduce implant wear?
The hinge structure is specifically designed to prevent direct contact between the metal hinge axis and the metal femoral condyle, which minimizes material friction and wear over time.
How does the system distribute joint loads?
It is designed so that 95% of the load is borne by the tibia, aligning with the natural load distribution of primary prostheses where gravity and joint surface stress are supported by the tibiofemoral joint surface.
What safety features protect against hyperextension?
During prosthetic hyperextension, the anterior curvature of the HRSK comes into contact with the tibial joint surface, which slightly separates the knee joint to prevent hyperextension impact.
What materials are used in the construction of the HRSK® components?
The Femoral Condyle and Tibial Tray are constructed from premium Cobalt-Chromium-Molybdenum (CoCrMo) alloy, while the Tibial Bearing is made from high-grade German Ultra-High-Molecular-Weight Polyethylene (UHMWPE).