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Root resorption of maxillary incisors as a result of impacted maxillary canines is a sequelae of canine ectopia that has been reported in the literature in terms of case reports and retrospective case series. However, to our knowledge there has been no work done that consolidates the available information on the subject, particularly since the advent of improved imaging techniques with higher rates of detection of maxillary incisor root resorption. This paper aims to review the prevalence rates of maxillary incisor root resorption induced by impacted maxillary canines, as well as to discuss the diagnosis and prognosis of teeth affected by this phenomenon.
Clinical Relevance: Maxillary incisor root resorption induced by ectopic maxillary canines is an issue which may be encountered by all dental specialties; however, the awareness of each stage of management is frequently unknown by clinicians. This paper aims to increase awareness and provide a reference point for appropriate management.
Article
The failure of eruption of the maxillary canine at its appropriate site within its normal period of eruption has led to a high volume of literature reporting on the aetiology, diagnosis and management of ectopic canines.1 The significance of palatally impacted canines has also been acknowledged by the Royal College of Surgeons (Eng) in the form of a national treatment guideline.2
The prevalence of canine impaction has frequently been quoted in literature as second only to third molars, occurring from 0.8% to 3.3% in varying population bases.1,3,4,5 Impaction of the maxillary canine can lead to root resorption of the maxillary central or lateral incisor. The resorption can occur as either a physiological or pathological activity of the cementoclasts, which results in loss of cementum and/or dentine.6 External root resorption of the maxillary incisors is usually discovered by chance and, once clinically diagnosed, may already be at an advanced stage, thereby limiting the treatment options.
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