Early diagnosis and treatment of orthodontic problems may prevent extensive orthodontic treatment during adolescence and can greatly improve the final outcome. Conditions that are frequently treated as the permanent teeth are beginning to erupt are breathing problems, the improper functioning of oral muscles, improper jaw alignment, a lack of growth of the upper or lower jaw, and crooked or crowded teeth. Common early orthodontic procedures include arch expansion, the correction of cross bite, modification of growth patterns and the creation of space for permanent teeth.