关键词: 牙本质敏感, 抗敏感牙膏

Abstract: Summary： Dentin hypersensitivity is defined as a short，sharp pain resulting from exposed dentin in response to stimuli，which are typically thermal，evaporative，tactile，osmotic or chemical and which cannot be ascribed to any other form of dental defect or disease. The most widely accepted mechanism of dentin hypersensitivity is the hydrodynamic theory. Two processes are essential for the development of dentin hypersensitivity：dentin must become exposed，through either loss of enamel or gingival recession，and the dentin tubules must be open to both the oral cavity and the pulp. To diagnose dentin hypersensitivity，clinicians must rely on patient-reported history and clinical examination. By definition，dentin hypersensitivity is a diagnosis of exclusion. Dentine hypersensitivity is common in Chinese adults，with the prevalence of 29.7%. On the other hand，most dentists in China have not grasped the knowledge，diagnosis and treatment of dentin hypersensitity. To prevent dentin hypersensitivity，predisposing factors and causes of dentin hypersensitivity should be removed or modified. The principle of treament relies on reducing fluid flow in the tubules，blocking the nerve response in the pulp or possibly both. Everyday use of desensitizing toothpastes should be considered and recommended as a noninvasive，inexpensive and efficacious first line of treatment.

Key words: dentin hypersensitivity, desensitizing toothpaste