The Kambin triangle is a specialized surgical instrument used in arthroscopic surgery. It is a triangular-shaped tool that is inserted into a joint through a small incision and is used to create a portal, or small opening, in the joint for the insertion of an arthroscope, a thin camera used for visualization. The Kambin triangle is designed to allow for a more precise and controlled creation of portals in the joint, which can be useful in performing minimally invasive surgical procedures, such as joint debridement, reconstruction, or biopsy.