Spinal Pedicle Screw-Rod Compression Fatigue Tester
The Spinal Pedicle Screw-Rod Compression Fatigue Tester provides a professional solution for evaluating the mechanical durability of spinal fixation systems under cyclic compression loading. With precise force control, advanced data acquisition, and compatibility with ASTM and ISO testing requirements, the system supports implant development, verification testing, and quality control for medical device manufacturers and research laboratories.
Applications
Evaluating the fatigue life of spinal pedicle screw-rod systems with different materials and designs under compressive stress. By applying cyclic compressive loads, the tester determines how many cycles of compression the screw-rod system can withstand before fatigue failure occurs. This allows for the comparison of the fatigue resistance of systems made from different materials (e.g., titanium alloys, cobalt-chromium alloys), with varying screw designs (e.g., thread type, diameter, length), rod diameters, and connection mechanisms.
Studying the deformation, damage, and performance changes of spinal pedicle screw-rod systems under long-term loading. During prolonged cyclic compressive testing, the tester can monitor and quantify various aspects of the system's response, including axial deformation, potential screw loosening from the simulated bone, damage to the rod or connectors, and changes in the overall stiffness of the construct. This provides valuable insights into the degradation mechanisms under compressive fatigue.
Comparing the differences in compressive fatigue performance among spinal pedicle screw-rod systems from different brands and models. The tester provides a standardized and objective platform for comparing the compressive fatigue durability of commercially available spinal fixation systems.7 This data is crucial for surgeons, hospitals, and purchasing departments to make informed decisions based on the expected long-term mechanical performance of the implants.
Providing scientific evidence for the research, development, production, and quality control of spinal implants, and helping to improve and optimize product designs. The data generated from compression fatigue tests is essential for supporting the safety and efficacy claims of spinal pedicle screw-rod systems in regulatory submissions (e.g., to FDA or equivalent bodies). It also serves as a critical tool for R&D engineers to optimize implant designs, material selection, and manufacturing processes to enhance compressive fatigue resistance and improve clinical outcomes. Furthermore, it is used in quality control to ensure that manufactured systems consistently meet performance specifications.
Standards
ASTM F1717
ASTM F2706
ISO 12189
Parameters
| Parameter | Specification |
|---|---|
| Loading Type | Cyclic compression fatigue testing |
| Dynamic Load Capacity | ±5 kN to ±50 kN (configuration dependent) |
| Frequency Range | Up to 10 Hz or higher (depending on testing requirements) |
| Load Control Accuracy | ≤ ±1% of set load |
| Displacement Control Accuracy | ≤ ±1% of set displacement |
| Maximum Cycle Count | Up to 5 million or 10 million cycles (configuration dependent) |
| Actuator Type | Servo-hydraulic or electrodynamic actuator |
| Loading Mode | Axial compression fatigue, optional multi-axis loading |
| Data Acquisition | Load, displacement, cycle count monitoring |
| Environmental Condition | Optional temperature-controlled fluid bath |
| Temperature Range | Ambient to 40℃ or higher (optional) |
| Temperature Accuracy | ±1℃ or better (optional) |
| Sample Compatibility | Various spinal screw-rod construct configurations |
| Power Supply | AC 220V / 380V, 50/60Hz (configuration dependent) |
Features
(1) High-precision dynamic loading system
Applies controlled cyclic compression forces with stable load output for fatigue testing.
(2) Standard-compliant test fixture design
Supports spinal implant construct testing according to ASTM and ISO requirements.
(3) Accurate fatigue data acquisition
Records load, displacement, and cycle information throughout long-duration testing.
(4) Flexible loading waveform control
Supports programmable loading profiles including sinusoidal and customized fatigue waveforms.
(5) Failure detection capability
Monitors excessive deformation, structural damage, and fatigue failure conditions.
(6) Advanced testing software
Provides parameter setup, real-time monitoring, data recording, and fatigue analysis functions.
(7) Optional environmental simulation
Temperature-controlled chambers or saline environments can be integrated for simulated physiological conditions.
(8) Safety protection system
Includes overload protection, emergency stop, and protective enclosure design.
FAQ
(1) What is a Spinal Pedicle Screw-Rod Compression Fatigue Tester?
The Spinal Pedicle Screw-Rod Compression Fatigue Tester is a mechanical testing system used to evaluate the fatigue durability of spinal fixation assemblies. It applies repeated compression loads to implant constructs and measures fatigue life, deformation behavior, and structural failure characteristics under controlled laboratory conditions.
(2) What products can be tested with this instrument?
This tester is mainly used for spinal pedicle screw-rod systems, spinal fixation assemblies, and related implant components. It is suitable for evaluating different materials, screw designs, rod structures, and connection mechanisms during medical implant research, verification testing, and quality control.
(3) How does the compression fatigue test work?
The system installs the spinal implant construct into a dedicated fixture and applies controlled cyclic compression loading through a dynamic actuator. During testing, sensors continuously record load, displacement, and cycle data to analyze fatigue performance and identify potential failure points.
(4) Which standards are supported by this tester?
The system supports spinal implant fatigue testing methods including ASTM F1717, ASTM F2706, and ISO 12189. Testing configurations can be customized according to laboratory procedures, implant designs, and specific verification requirements.
(5) Can the tester be customized for different implant testing requirements?
Contact our technical team to discuss your spinal implant testing application and configuration needs.
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