Product Details
HRSK Rotating Hinge Knee System: Optimized Load Distribution by China Suppliers and Factory for Enhanced Performance
Special Description
- Modular sleeves provide Intra-operative flexibility by accommodating bone defects of the Engh Type II and Type III.
- Highly polished upper surface reduces postoperative wear.
Augments with 187 Specifications
- Are available for patients with inadequate bone stock.
Tibial Augment
Designed to provide stable support and fill defects in the tibial region, ensuring proper alignment and load distribution.
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 Demonstration
Technology Education
Download PDF
Frequently Asked Questions
What clinical benefits do the modular sleeves of the HRSK System offer?
The modular sleeves provide excellent intra-operative flexibility, allowing surgeons to effectively accommodate and reconstruct severe bone defects classified under Engh Type II and Type III.
How does the hinge mechanism protect against implant wear?
The hinge design prevents direct contact between the metal hinge axis and the metal femoral condyle. This significantly buffers stress transmission and minimizes wear, reducing the risk of cement-bone interface loosening.
What materials are used in the components of the HRSK System?
The femoral condyle and tibial tray are fabricated from CoCrMo (Cobalt-Chromium-Molybdenum) alloy for high strength, while the tibial bearing is made of high-durability UHMWPE sourced from Germany to ensure reduced friction and wear.
How does the trochlear groove design optimize patellar tracking?
The deepened and extended trochlear groove reduces patellar force throughout the full range of motion. This design feature effectively alleviates the risk of patellar subluxation and dislocation.
What feature prevents hyperextension impact in this knee system?
During prosthetic hyperextension, the anterior curvature of the HRSK contacts the tibial joint surface. This interaction gently separates the joint slightly to absorb impact, protecting the knee construct from hyperextension damage.