Caries incidence falls. Dentine increase at expense of pulp size. Secondary and reparative dentine deposition. Changes in dentine - dead tracts, increase of peritubular dentine, darkens and sclerotic dentine formed. Pulp constituents alter - cells decrease and fibres increase.
Deposition goes on throughout life, deposition increases in response to enamel wear.
Tends to be cellular type. Increase or decrease of load due to loss of teeth influences width. Apical migration of attachment. Rate increases with gingival disease. Epithelium gets thinner, more fragile, less keratinised Epithelial pegs flatten, turnover rate falls.