Which synthetic mesh is not considered synthetic?

The correct answer is stainless steel mesh because it is composed of metal, whereas the other options are made of synthetic materials. Synthetic meshes, like polypropylene, PTFE (polytetrafluoroethylene), and polyester, are specifically designed for surgical applications and are derived from polymers. These materials exhibit properties that make them suitable for various medical procedures, such as biocompatibility, flexibility, and resistance to infection.

In contrast, stainless steel mesh is made from a metal alloy, primarily iron, with chromium and other elements added to enhance its strength and resistance to corrosion. Although stainless steel mesh can be used in surgical applications, such as in certain orthopedic or cardiovascular procedures, it does not fall under the category of synthetic meshes, which are characterized by their polymer-based composition. This fundamental difference underlines why stainless steel is not considered a synthetic mesh.