Dental hygiene services include scaling, polishing and in some circumstances, preventive topical fluoride application. Dr. Zhao believes that any dental treatment should be tailored to suite the patient's needs. In general, most patients require dental hygiene services once every six months. However, the frequency of such treatment can very depending on the patient's current oral health, patient's oral hygiene habit, and patient's specific dental needs. Dental hygiene care is fundamental to a person's oral health.