Knee Joint Prostheses Wear Tester
Standard
ISO 14243-1:2014: Specifies wear testing parameters for total knee prostheses, including axial loading, flexion/extension kinematics, and environmental conditions.
ISO 14243-3:2014: Defines protocols for simulating physiological loading, displacement, and rotation during knee joint wear testing.
ASTM F3297-18: Additional compliance for advanced testing scenarios including high-flexion and pivot-shift motions.
Product Advantages
Hexapod Motion Control: 6-DOF kinematic simulation replicates natural knee motion (flexion/extension ±120°, AP displacement ±15 mm, tibial rotation ±20°).
Dynamic Load Management: Dual-axis load control (axial 0–3.000 N, shear 0–500 N) with 0.1% force accuracy.
Biorelevant Environment: Temperature-controlled (37±1°C) lubrication bath with 20±2 g/L protein concentration.
Extended Durability: Capable of 10+ million cycle testing with <0.3% drift in calibration.
Automated Compliance: Pre-programmed ISO/ASTM test protocols with real-time data validation.
Modular Design: Four-station configuration allows parallel testing of multiple specimens.
Product Features
Electrohydraulic Actuation: Six independent servo-hydraulic actuators for precise motion control.
6-Axis Force/Torque Sensors: Measure axial forces, shear forces, and torsional moments simultaneously.
Temperature-Controlled Bath: Recirculating lubrication system with protein skimmer and pH monitoring.
High-Resolution Imaging: Optional integration with micro-CT systems for in-situ wear analysis.
AI-Powered Analytics: Machine learning algorithms predict wear rates from initial test cycles.
Safety System: Emergency stop, over-pressure relief, and laser-based specimen breakage detection.
Technical Parameters
| Parameter | Specification |
|---|---|
| Flexion/Extension Range | ±120° (0.01° resolution) |
| AP Displacement | ±15 mm (1 μm resolution) |
| Tibial Rotation | ±20° (0.01° resolution) |
| Max. Axial Force | ±3.000 N (500 N resolution) |
| Max. Shear Force | ±500 N (100 N resolution) |
| Load Control Accuracy | ±0.5% of reading (0–3.000 N) |
| Frequency Range | 0.1–5 Hz (programmable waveforms) |
| Temperature Control | 37±1°C (PT1000 sensors) |
| Lubrication System | 10L capacity with protein skimmer and bubble trap |
| Data Acquisition | 100 kHz sampling rate (16-bit resolution) |
| Power Requirements | 220V/110V ±10%, 50/60Hz, 2.500W |
| Dimensions (W×D×H) | 1.800 × 1.200 × 2.000 mm |
| Weight | 950 kg (including bath and control cabinet) |
| Noise Level | <65 dB (A-weighted) |
Accessories
Knee Simulator Fixture Kit:
Self-centering femoral/tibial component adapters (28–40 mm)
Patella-femoral contact jigs (30°–60° Q-angle adjustability)
Biorelevant Bath System:
10L capacity with recirculation pump and protein skimmer
316L stainless steel construction with HEPA filtration
WearMaster Pro Software:
Automated wear rate calculation (mass loss/volume displacement)
21 CFR Part 11-compliant audit trail with blockchain timestamping
Remote monitoring via iOS/Android app
Operator Kit:
Calibrated torque wrench set (1–50 Nm)
Specimen alignment gauges (ISO 14243-1 compliant)
Calibration Bundle:
NIST-traceable force calibration weights
Angular encoder verification tool
Safety Kit:
Laser safety curtains
Acoustic enclosure with 30 dB noise reduction
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