Osteosynthesis Implants ISO 9585 Testing of surgery bone plates, Bending / Flexural Test Method for Metallic Bone Plate

ISO 9585 Describes a test method for straight plates but may also be used for ones having a small initial curvature. The method is neither recommended for plates of a length less than 50 mm nor for those designed to be used with, or forming parts of, intramedullary devices.

The static and dynamic strength of the bone plates are determined in 3-point or 4-point bending tests, whereby the bending device consists of two fixed and parallel supports. The bone plate (1) is fixed or clamped on the specimen holder (2). A cyclic, sinusoidal load is applied to the implant via a punch (3) until the specimen breaks or until the maximum number of cycles is reached. Testing in a liquid bath (heated to body temperature) with Ringer's solution increases the physiological relevance of the test. Force and displacement signals i.e. the deflection of the sample- must be recorded during the test. 

1, Single circle bending test method for metal bone plate: This method measures the bending stiffness, bending structural stiffness, and bending strength, and determines the intrinsic structural characteristics of the metal bone plate.

2, Testing method for bending fatigue characteristics of metal bone plates: This method can be used to determine the fatigue life of bone plates at specific or a series of maximum bending levels, or estimate the fatigue strength at a specified number of cycles.

UnitedTest ASTM F382 Metallic Bone Plates bending fatigue testing machine/dynamic testing machine can used to execute the above mentioned test.