41. Which of the following cannot be considered as a risk factor of dentin hypersensitivity? a. xerostomia b. periodontal y treated patients c. untreated carious tooth d. gingival recession e. overenthusiastic brushes

The correct answer is b. periodontally treated patients.<br /><br />Dentin hypersensitivity is a common dental condition characterized by sharp, sudden pain or discomfort when consuming hot, cold, or sweet substances. Several factors can contribute to the development of dentin hypersensitivity, including:<br /><br />a. Xerostomia: Dry mouth or reduced saliva flow can lead to increased sensitivity of the dentin.<br /><br />c. Untreated carious tooth: Decay or cavities in a tooth can expose the dentin and lead to hypersensitivity.<br /><br />d. Gingival recession: When the gums recede, the roots of the teeth are exposed, which can cause sensitivity.<br /><br />e. Overenthusiastic brushing: Brushing teeth too vigorously or using a toothbrush with hard bristles can wear down the enamel and expose the dentin.<br /><br />However, periodontally treated patients (b) are not typically considered a risk factor for dentin hypersensitivity. Periodontal treatment aims to address issues related to gum disease and does not directly contribute to the exposure of dentin or the development of dentin hypersensitivity.