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.
1 A mountain is the highest landform on the surface of the earth. 2  It is usually found to be conical in shape with steep sides and a pointed tip called a peak. 3  As compared to their surroundings, mountains are high points on the surface of the earth.4  Mountain range is a series of mountains. A mountain is the highest landform on the surface of the earth. 2  It is usually found to be conical in shape with steep sides and a pointed tip called a peak. 3  As compared to their surroundings, mountains are high points on the surface of the earth.