NEET PG DENTAL EXAM

Detailed explanation-1: -Age-related changes in dentine include the formation of secondary dentine and the reduction in tubular lumen diameter (dentine sclerosis), which lead to a reduction in the volume of the pulp chamber.

Detailed explanation-2: -In the first phase, dentinal tubules, due to loss of enamels, are exposed by attrition, abrasion, erosion, and abfraction. However, dentinal exposure mostly occurs due to gingival recession along with the loss of cementum on the root surface of canines and premolars in the buccal surface.

Detailed explanation-3: -Primary dentine forms before tooth eruption. Secondary dentine forms after eruption, as the tooth develops with age. Reparative or tertiary dentine forms as a result of trauma to the odontoblasts; this can be thermal, chemical, bacterial or mechanical.