Malocclusions are the 3rd most common of oral health problems, and are associated with a number of complications (1). Orthodontic treatment often can correct these complications or at least prevent them from progressing; but it also holds some potential for harm to teeth and periodontal tissues. For example oral hygiene
may be difficult to maintain during treatment, which may lead to plaque accumulation and gingival inflammation (2). It has been shown that orthodontic treatment induces changes in the oral environment, with an increase in the bacteria’s concentration, and alterations in buffer capacity, pH acidity and salivary flow rate (3);
however, little is known about periodontal inflammation that results in occult blood in saliva and the acidity
of dental plaque.