Relation between agenesis and shape anomaly of maxillary lateral incisors and canine impaction

Anísio Bueno De Carvalho,Rogério Heladio Lopes Motta,Eliane Maria Duarte De Carvalho

doi:10.1590/s2176-94512012000600018

Anísio Bueno De Carvalho, Rogério Heladio Lopes Motta + Show 1 more

Open Access

https://doi.org/10.1590/s2176-94512012000600018

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Abstract

OBJECTIVE: The purpose was to obtain information about the relation between agenesis and shape anomaly of maxillary lateral incisors and canine impaction. METHODS: Seventy-three patients with canine impaction and 73 control patients, without canine impaction, were evaluated. The mesiodistal distances of the maxillary lateral incisors adjacent to the impacted canines and the correspondent mandibular lateral incisors were measured. The adjacent lateral incisors were classified in: 1 - absent, 2 - small, 3 - peg-shaped, 4 - standard. RESULTS: The results showed that among the patients with impacted canines, there were 21 anomalous teeth (small and peg-shaped) and among the control patients there were only three small and peg-shaped teeth, with a statistically significant difference (p = 0.001). No patients were found with impacted canines and absent lateral incisors. CONCLUSION: It was concluded that in patients with anomalous lateral incisors (small and peg-shaped) there is a probability to present impacted canines and this must be considered.

Highlights

» Inclusion Criteria: 1) Chronological age of 13 years minimum; 2) Panoramic radiographs with presence of impacted upper canine; 3) Patients that presented all teeth in the dental arch, except in cases of agenesis of maxillary lateral incisors; 4) Patients that did not present resin restoration nor enamel fractures of the maxillary and mandibular lateral incisors
There was a greater prevalence of the female gender, which confirms the work of Becker,[16] who found a proportion of two women for each man with impacted canines.[7,13,16,20]
These results can be explained by the prevalence of anomalies in maxillary lateral incisors, that is mostly found in women than in men

Summary

Objective

The purpose was to obtain information about the relation between agenesis and shape anomaly of maxillary lateral incisors and canine impaction. The mesiodistal crown width of the maxillary and mandibular incisors have been reported to be significantly smaller in patients with palatal canine impaction.[1,4,5,6,7,10,11,12,14] The root length of lateral incisors adjacent to palatally displaced canines was reported as responsible for the displacement of the palatally impacted maxillary canines.[8] To correct this malocclusion, the most common preventive treatment is to extract the deciduous canine expecting that the permanent canine will adjust its position by itself.[31] Two studies reported the success with this treatment, finding favorable eruption in 78% of the individuals, by Ericson and Kurol,[17] and in 62% of the individuals, by Power and Short.[30]. The purpose of this study was to evaluate the existing relation between impaction of upper canine and a) shape anomaly of maxillary lateral incisors; b) agenesis of maxillary lateral incisors

MATERIAL AND METHODS

Methods

DISCUSSION

Peg-shaped