Root Resorption

Abstract

Root resorption is the loss of the dental hard tissues. This chapter provides an overview of the different types of resorption that affect the dental hard tissues. It discusses the aetiology, pathogenesises, diagnosis and management of internal and external resorption. Depending on its location in relation to the root surface, root resorption may be classified as internal or external. Internal root resorption affects the root canal wall. It is further classified as either inflammatory or replacement. External inflammatory root resorption is a common finding in almost all teeth diagnosed with apical periodontitis. These lesions are also observed following severe traumatic injuries such as luxation injuries and avulsion. External replacement resorption occur as a result of injury to the periodontal attachment apparatus, usually following trauma. External surface resorption is transient and induced by pressure such as orthodontic tooth movement, impacted teeth, cystic lesions and tumours.