Oral complications caused by radiation therapy to the head and neck include the following: Fibrosis (growth of fibrous tissue) in the mucous membrane in the mouth. Tooth decay and gum disease. Breakdown of tissue in the area that receives radiation. Breakdown of bone in the area that receives radiation.
A landform is any natural formation of rock and dirt, found on Earth. A landform can be as large as a mountain range, or as small as a hill. It can be as large as a continent, or as small as a pond.
These events change the surface of the Earth by creating different landforms. A landform is a term that describes the shape of a natural land feature. Landforms are created by different forces of nature. For example, mountains, oceans, valleys and deserts can be called landforms.