Evaluation of Medical Equipment/Implant Materials
Bending Fatigue Test of Bone Plates
Evaluation of fatigue strength of bone plates under cyclic loading in accordance with JIS standard.
Outline of Measurement Technology
Because damage to bone plates frequently originates from screw holes near the fracture line, evaluation by the 4-point bending test is recommended from the viewpoint of strength of materials.
The 4-point bending fatigue test is effective when evaluating the durability of products in which new materials are used.
This test evaluates the durability of bone joining devices which are subject to bending loads in accordance with the corresponding JIS standards.
[Outline of Test]
| Corresponding standards | JIS T 0312 "Testing methods for bending properties of metallic osteosynthesis devices" |
|---|---|
| Test environment | Room temperature, normal temperature, in atmosphere |
| Test method | 4-point bending fatigue test |
| Load frequency | 1-5 Hz |
| Examples of applicable medical products | Plates, CHS (Compression Hip Screw), nails, intramedullary nails, screws, etc. |
Example of Measurement of 4-Point Bending Fatigue Strength
Example of 4-point bending fatigue test of bone plate
[Test Conditions]
| Test environment: | Room temperature, normal temperature, in atmosphere |
|---|---|
| Cyclic frequency: | 3 Hz |
| Test specimen: | 8-hole plate (Ti) |
Example of test jig
