This document summarizes age-related changes to the periodontium. It discusses how aging affects tissues like the epithelium, connective tissue, periodontal ligament, cementum and alveolar bone at the cellular level through intrinsic changes like decreased cell renewal and stochastic changes due to mutations. It also reviews theories of aging and describes functional, physiologic and clinical changes that occur with age like gingival recession and bone loss. The document provides an overview of considerations for treating aged patients and the effects of aging on wound healing and prognosis.