For manufacturers and research teams developing spinal fixation systems, mechanical testing plays an important role in evaluating implant performance under static and repeated loading. To address these requirements, Laryee has developed and delivered a testing solution for a customer in Vietnam, combining the PWS-3 electronic fatigue testing machine with dedicated compression-bending fixtures based on ASTM F1717.

Figure 1. PWS-3-based testing system used in spinal implant mechanical testing applications.

One Platform for Static and Fatigue Testing

The solution is designed to support both static compression-bending and compression-bending fatigue tests on spinal implant constructs using a shared testing platform and application-specific fixtures.

For static testing, the submitted project configuration specifies displacement-controlled loading at a rate not exceeding 25 mm/min, with software-supported evaluation of parameters including yield load, stiffness and ultimate load. For fatigue testing, the system supports cyclic loading and the recording of load-cycle data for subsequent analysis.

Figure 2. Software interface showing a static compression-bending test result.

Purpose-Built Fixtures for Spinal Constructs

A key element of the solution is its dedicated fixture assembly, incorporating ultra-high-molecular-weight polyethylene (UHMWPE) test blocks and hinged connections. The arrangement allows the blocks to rotate under loading, helping reproduce the intended boundary conditions of the ASTM F1717 test setup.

Figure 3. Fixture arrangement for spinal implant compression-bending testing.

By pairing a suitable loading system with application-specific fixtures, the solution addresses more than machine capacity alone: specimen mounting, load transfer and repeatable test configuration are also considered in the equipment design.

Test Control and Data Analysis

The project materials describe sinusoidal constant-amplitude loading for fatigue tests, with configurable test parameters and software functions for recording results and preparing reports. The submitted configuration also references testing up to five million cycles and S–N curve generation. These are project-specific testing and analysis settings; the appropriate protocol and acceptance criteria should be defined for each implant and test program.

Delivered for a Customer in Vietnam

According to the project submission, the PWS-3-based solution and dedicated fixtures have been manufactured and delivered to an end customer in Vietnam for spinal implant development and evaluation. The fixture concept can also provide a starting point for testing related spinal fixation constructs, subject to specimen geometry and test requirements.

Laryee works with laboratory and industrial customers to translate application requirements into practical testing systems, integrating loading equipment, specialized fixtures and test-control functions.

Have a spinal implant or other medical-device mechanical testing requirement? Contact Laryee to discuss a suitable testing configuration.