Spinal Pedicle Screw-Rod System Compressive Fatigue Tester

Standard

YY/T 0857-2011 (China): Specifies compression fatigue testing protocols for spinal pedicle screw-rod systems, including load ratios, frequency, and failure criteria.

YY/T 1560-2017 (China): Defines methodologies for evaluating the fatigue strength of spinal implant assemblies under complex loading.

ASTM F1717-18 (International): Standard test methods for spinal implant constructs in vertebrectomy models.

ASTM F2706-19: Specifies static and fatigue testing requirements for occipito-cervical and occipito-cervico-thoracic spinal implants.

Product Advantages

High-Frequency Stability: Advanced electromagnetic actuator maintains 0.1–15 Hz frequency range with ±0.05% force accuracy.

Ultra-Precision Loading: 50 kN axial force capacity with 1 N resolution for submicron displacement control.

Dynamic Load Control: Programmable R=0.1–10 load ratios with real-time stiffness compensation.

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 <0.2% drift in calibration.

Modular Design: Six-station configuration allows parallel testing of multiple specimens.

Product Features

Electromagnetic Servo Motor: 50 kN axial force capacity with programmable load ratios (R=0.1–10).

Triaxial Strain Gauge: Measures axial/radial strains simultaneously (0.1 με resolution).

Dynamic Load Control: 0.1–15 Hz frequency range with programmable waveforms (sine, square, random, custom).

Thermal-Mechanical Chamber: ±0.3°C temperature stability with integrated humidity control (10–95% RH).

High-Resolution Imaging: Optional integration with micro-CT systems for in-situ crack analysis.

Safety System: Emergency stop, overload clutches, and laser-based specimen breakage detection.

Technical Parameters

Parameter	Specification
Max. Axial Force	±50.000 N (50 N resolution)
Frequency Range	0.1–15 Hz (0.01 Hz increments)
Load Ratio (R)	0.1–10 (adjustable)
Axial Displacement	±15 mm (0.1 μm resolution)
Temperature Control	-20°C to +50°C (PT1000 sensors)
Humidity Control	10–95% RH (non-condensing)
Data Sampling Rate	100 kHz (synchronized across 16 channels)
Power Requirements	220V/110V ±10%, 50/60Hz, 3.500W
Dimensions (W×D×H)	2.200 × 1.600 × 2.300 mm
Weight	1.350 kg (including environmental chamber)
Noise Level	<65 dB (A-weighted)

Accessories

Spinal Implant Fixture Kit:

Self-centering pedicle screw clamps (4.5–7.5 mm diameter compatibility)

Rod-bending jigs with laser-aligned loading anvils

Thermal-Mechanical Chamber:

25L capacity with rapid cooling/heating (15°C/min)

316L stainless steel interior with HEPA filtration

CompressionMaster Pro Software:

Automated stiffness degradation tracking and fatigue limit calculation

21 CFR Part 11-compliant audit trail with blockchain timestamping

Remote monitoring via dedicated iOS/Android app

Operator Kit:

Calibrated torque wrench set (0.5–50 Nm)

Specimen alignment gauges (ASTM F1717 compliant)

Calibration Bundle:

NIST-traceable force calibration weights

Strain gauge verification tool

Safety Kit:

Laser safety curtains

Acoustic enclosure with 30 dB noise reduction

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