Kype Kype A kype is a hook-like secondary sex characteristic which develops at the distal tip of the lower jaw in some male salmonids prior to the spawning season. The structure usually develops in the weeks prior to, and during, migration to the spawning grounds. In addition to the development of the kype, a large depression forms in the two halves of the premaxilla in the upper jaw, allowing the kype to fit into the premaxilla when the mouth is closed. The kype functions as a secondary sexual characteristic and influences the formation of dominance hierarchies at the spawning grounds. The
Osteonecrosis of the jaw known to occur spontaneously. There may be no symptoms for weeks or months, until lesions with exposed bone appear. Lesions are more common on the mandible than the maxilla. Post radiation maxillary bone osteonecrosis is something that is found more in the lower jaw (mandible) rather than the maxilla (upper jaw) this is because there are many more blood vessels in the lower jaw. The symptoms of this are very similar to the symptoms of MRONJ. Patients are in a lot of pain, the area may swell up, bone may be seen and fractures may take place. The patients may