Hypercementosis is characterized by the excessive deposition of cementum on tooth roots. It can be localized, affecting a single tooth due to conditions like periapical osteitis, or generalized, affecting many teeth as an age-related factor or due to diseases like Paget's disease of bone. Radiographically, it appears as thickening and blunting of roots with a bulbous or irregular apex. Diagnosis is clinical based on the bulbous root appearance. Treatment focuses on managing any underlying primary causes.