It is important to remove bacterial plaque formation in order to prevent dental caries and interproksimal pathology. Even though brushing is important for oral hygiene if it's not performed well only tounge, cheek, palate and occlusal surfaces would be cleaned. There are several methods for cleaning interproksimal area. It's important to use appropraite instruments in a proper way to perform an exact oral hygiene. The aim of this study is to investigate the frequency of other instruments' use in addition to tooth brush in order to remove bacterial plaque. It's important to educate patients to achieve a better oral hygiene. We concluded that the frequency of interdental brush use regularly and effectively is higher between the patients who have periodontal and orthodontic treatment as a result of recieve a better education from dentists.