Oral surgery is a part of dentistry that uses surgical methods in treating various functional and esthetic aspects of oral health. It includes the entire procedure from diagnosis to surgical treatment of defects and diseases involving both hard and soft tissue of teeth, mouth, gums and jaws. Oral surgery is commonly performed to remove wisdom teeth, prepare the mouth for dentures, repair jaw problems and perform root canals. Oral surgeons may also perform more advanced procedures, for example reconstruction that are required after trauma or severe damages to the structures of the mouth. Oral surgery is also used to help in orthodontic therapy and to correct irregularities and defects of face and jaws.