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Lateral Incisor Root Resorption: A Consequence of Ectopic Maxillary Canine Teeth Dental Update 2024 15:2, 707-709.
Abstract
Root resorption of permanent teeth is a recognized complication of ectopic maxillary permanent canines. This type of resorption is sometimes missed and can be diagnosed at the late presentation stage. Treatment of external resorption is complex and can require extraction of the affected tooth. This review provides an insight into the current evidence and guidance related to the interceptive treatment of displaced permanent maxillary canines to minimize the risk of resorption of adjacent teeth. Supported by two clinical cases, it looks into treatment options and long-term management of lateral incisors with external root resorption of varying severities.
CPD/Clinical Relevance: Primary care practitioners are best placed to recognize displaced maxillary permanent canines in a timely manner, and so, root resorption of adjacent teeth may be prevented.
Article
Lateral incisor root resorption is a recognized complication of impacted permanent maxillary canines, with a reported incidence varying from 0.7% to 12.5%.1 Resorption can be easily overlooked as a consequence of superimposition of the ectopic canines in plain radiographic views, and is therefore often diagnosed at a late stage. Although, at the time of diagnosis, most teeth are asymptomatic, resorption defects are often severe and consequently, these teeth can be deemed unrestorable.2 We present an overview of two cases and review the current literature relating to interceptive treatment of ectopic canines and management of teeth with root resorption.
An ectopic impacted tooth is one that fails to erupt at its appropriate site in the dental arch within a normal period of growth, based on clinical and radiographic assessment.3 In the permanent dentition, impacted maxillary canines have an incidence rate of 1.5%, second only to mandibular third molar teeth.4 These teeth usually erupt at the age of approximately 10.5 years in girls and 11.5 years in boys, and should be palpable from age 8 years.5 Ectopic permanent canines can have many adverse effects including cyst formation, displacement of adjacent teeth, loss of vitality and external resorption of adjacent teeth, all of which can complicate and lengthen restorative and orthodontic treatment for the patient. Further investigation with plain radiographic films for localization and advanced imaging with cone beam computed tomography (CBCT) is often required if a maxillary permanent canine is not palpable by the age of 10, or if there is prolonged retention of the primary predecessor.
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