Non-absorbable sutures are surgical threads that do not dissolve in the body over time. They are made from materials like silk, nylon, or polypropylene and are used to close wounds or surgical incisions that require long-term support. These sutures remain intact until they are manually removed or until they are no longer needed. These sutures are often chosen for their strength and durability, making them ideal for areas that experience tension or movement, such as joints or muscle tissue. Non-absorbable sutures can also be used in internal procedures, where they provide lasting support without the risk of breaking down prematurely.