Indonesian Journal of Dentistry 2006; Edisi Khusus KPPIKG XIV: 221-223Hypersensitivity of dentine is a common problem and may occur in a specific tooth, in several teeth, or in one area of the mouth and with various intensity of pain. The most accepted theory related to dentinal hypersensitivity is the hydrodynamic theory. This paper will discuss the iontophoresis with fluor to overcome the problem of hypersensitivity.