Analytical Services : Mechanical
General Tensile Test
A basic mechanical testing protocol in which a sample (various forms possible) is strained in a single direction, most often to failure. This testing provides insight into material and construct properties such as Ultimate Tensile Strength, Yield Strength, Young’s Modulus, Yield Strain, and Ultimate Strain.
3-Point Bend Test
3-point bend testing is completed when a specimen is placed on two parallel support beams, and a load is applied downward between the two parallel beams. 3-point bending is useful for providing insight into the flexural stress, flexural strain, and modulus of elasticity in bending.
A test to evaluate a specimen’s mechanical and displacement response under compressive loads. Compressive testing is used to determine the compressive strength and modulus of a material.
Suture Tensile Test, Knotted and Unknotted
In addition to tensile testing of sutures, knot-pull test can be conducted under tensile loading to evaluate the knot strength of a suture. USP and EU standards for tensile testing methods are used in knot-pull testing. This analysis provides information about Tensile Strength, Elongation and Young’s Modulus, as well as the critical Ultimate Knot Load, which is used to assess against pharmacopeia suture requirements.
A commonly used method of testing the resistance of surgical mesh to failure at suture tie-in points. Suture Pull-out tests involve passing a suture through the construct and pulling in tensile to determine the failure load of the base material. Procedure-specific suture sizes and types are typically used, and the output is a failure load.
Ball burst testing involves constraining a section of mesh and impressing a polished hemispherical plunger to measure the resistance of the mesh to deformation and failure.
Standard test method to determine the relative peel resistance of adhesive bonds between flexible substrates. For cyanoacrylate adhesives, it is common to use porcine skin as a substrate, although the method most typically used at Poly-Med utilizes a consistent textile fabric soaked in 7.4pH buffered solution. The test output is average and maximum load to adhesive failure is reported per unit width, i.e. N/cm