PDF: Tooth root resorption: etiopathogenesis and classification

Resorption is the combination of physiological or pathological factors leading to the loss of enamel, dentin, cementum, and the alveolar bone by the action of polynuclear giant cells. 

There are various theories about the causes of resorption. They can be divided into local and systemic. For local reasons mainly are mentioned injuries, pulp necrosis, arising as a result of local caries, chronic pulp inflammation and iatrogenic factors, especially high temperature triggered during the cavity preparation or tooth crown preparation in prosthetic reconstruction.

Depending on location of the lesion, resorption is divided into internal and external. In some cases, the two types of resorption may occur simultaneously. Untreated resorption usually leads to loss of the tooth.

► See also: PDF: Nonmetallic post-endodontic restorations: a systematic review