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entin Hypersensitivity (DH) has been defined as 'an acute sharp pain of short duration due to exposed dentin, in response to external stimuli that cannot be ascribed to any other form of dental defect and pathology'.1,2 It is a painful response to different irritants such as tooth brushing, sweet and/or sour food etc.3 It is one of the most commonly encountered clinical problems in routine practice. It has also been considered as a chronic pain condition by some authors.4 It is a multi-factorial disease condition caused by enamel loss that could be due to any trauma, gingival recession, erosion and tooth wear.1 The prevalence of DH in the human population is about 10 to 30% , with a female predominance.5 Any surface of tooth can be affected but most common sites are buccal and cervical region of canine and premolars.3 DH can affect any age but usually peaks during the third and fourth decade of life.3 It has been proposed that dentin is composed of dentinal tubules that are covered by mineralized structures on crown by enamel or on the root by the cementum.6 Exposed dentinal tubules due to gingival recession or loss of enamel, play an important role in dentin hypersensitivity.7,8 Many theories have been proposed to explain this phenomenon, including 'Odontoblast Receptor Theory', 'Dentin Innervation Theory' but the most widely accepted theory is the 'Hydrodynamic Theory'. According to this theory, when dentinal tubules come into contact with any stimuli, the dentinal fluid present in tubules tends to move towards the pulp. This movement stimulates the nerve endings in the pulp and that leads to discomfort with pain called dentin hypersensitivity.5 Many agents to manage DH are currently being used 1. Registrar, Department of Periodontology, Riphah International University. 2. Assistant Professor, Department of Periodontology, Riphah International University 3. House Officer, Department of Periodontology, Riphah International University. Corresponding author: “Dr Anam Zahid Kiani” < anamzahid@gmail.com >

journal of pakistan dental association/journal of the pakistan dental association

Clinical Comparison of 5% Potassium Nitrate and 10% Strontium Chloride Toothpastes in Alleviating Dentin Hypersensitivity Following Manual Scaling: A Pilot Study