Definition : Devices conformed (e.g., molded) according to anatomic structures of the human body. Most stents are designed to provide support and/or to maintain patency within the body's tubular structures, such as blood vessels and gastrointestinal, urinary, or biliary ducts. These devices typically consist of a metallic (e.g., wire mesh) or polymeric (e.g., plastic, Silastic) tube. Metallic stents usually become a permanent implant a few weeks after deployment. Stents are typically used to keep the ducts patent after dilatation of strictures (e.g., angioplasty); some are used for anastomosis (e.g., vessel, intestinal). Several types of specialized stents are used in dentistry (e.g., antihemorrhagic, drainage, occlusal, periodontal) and maxillofacial surgery.
UMDC code : 15784