CINCINNATI--(BUSINESS WIRE)--Members of the American Association of Orthodontists (AAO) are treating more than 5.8 million children, teen-agers and adults in the U.S. and Canada. These orthodontic patients are paying close attention to an important aspect of their treatment: their oral hygiene home care. Crest/Oral-B and the AAO (American Association of Orthodontists) are teaming up to raise awareness about good oral hygiene maintenance for orthodontic patients in addition to the benefits of ge