Other than poor aesthetics, crowded teeth are difficult to clean and maintain. This may contribute to conditions leading to tooth decay and also gum disease. Children with protruding teeth would have a higher incidence of traumatizing their front teeth during or fall/accident. Other orthodontic problems can contribute to abnormal wear of teeth, inefficient chewing function, excessive stress on gum tissue and supporting bone or mal-alignment of the jaw joints. A person's self-esteem often improves as treatment brings teeth, lips and face into proportion. In this way, orthodontic treatment can benefit social and career success, as well as improve one's general attitude towards life.