Lateral incisor agenesis, canine impaction and characteristics of supernumerary teeth in a South European male population

Abstract

Objective:To assess the prevalence of lateral incisor agenesis impacted canines and supernumerary teeth in a young adult male population.Materials and Methods:The panoramic radiographs of 1745 military students (mean age: 18.6 ± 0.52 years) who attended the Center of Aviation Medicine of the Armed Forces of Greece during the period 1997-2011 were initially analyzed for lateral incisor agenesis by two observers. After exclusion of the known orthodontic cases, a subgroup of 1636 examinees (mean age: 18.6 ± 0.44 years) was evaluated for canine impaction and supernumerary teeth.Results:Twenty-eight missing lateral incisors were observed in 22 military students, indicating an incidence of 1.3% in the investigated population. No lateral incisor agenesis was detected in the mandibular arch. A prevalence rate of 0.8% was determined for canine impaction in the sample of young adults. The majority of impacted teeth (86.7%) were diagnosed in the maxillary arch. Thirty-five supernumerary teeth were observed in 24 examinees (prevalence rate: 1.5%). The ratio of supernumerary teeth located in the maxilla versus the mandible was 2.2:1. The most common type of supernumerary tooth was the upper distomolar.Conclusion:The prevalence of lateral incisor agenesis, canine impaction, and supernumerary teeth ranged from 0.8 to 1.5% in the sample of male Greek military students.

Frequency of impacted teeth and categorization of impacted canines: A retrospective radiographic study using orthopantomograms

“…The incidence of tooth impaction varies among various ethnic populations from 5.6% to 18.8%. [13][14][15] For instance, the prevalence of impacted maxillary canines has been reported as 5.4% among Hungarian, [16] 5.1% among Turkish, [17] and 2.1% among Chinese [18] orthodontic patients. A new classification has been proposed to classify the most frequently impacted maxillary canines.…”

The frequency of non-syndromic distomolar teeth in a Greek population sample?

“…According to previous reports 76% to 86% of non syndromic cases present only one supernumerary tooth (Fig. 1 ), 12% to 23% present two supernumerary teeth and only 1% present multiple supernumerary teeth ( 6 - 8 ). Supernumerary teeth are classified according to their location in the dental arches, or to their morphology ( 1 - 3 , 5 ).…”

“…They might be single or multiple and occur more often in males than in females. Furthermore, these teeth present a delayed development in relation to normal teeth, could be located in one or in both jaws, (although they present a predilection in the maxilla), may be erupted or impacted, symptomatic or asymptomatic, located unilaterally or bilaterally ( 1 - 6 ). Supernumerary teeth may occur as a clinical finding in syndromes such as cleidocranial dysplasia, in cleft lip and palate patients, otherwise they might be a non-syndromic finding ( 2 , 5 ).…”

“…If distomolars are impacted they may cause complications such as impaction, root resorption or pulp necrosis of the adjacent tooth, pain in the molar area, infection, formation of diastema, follicular cyst, neoplasms and neuralgias of the trigeminous nerve. In case that they erupt they may cause malocclusion, retention or ectopic eruption, delayed eruption of the adjacent teeth, mandibular disorders, periodontal disease and caries ( 2 , 6 , 8 ).…”

Development and evaluation of a standardized method and atlas for contouring primary and permanent dentition

“…On a per-tooth basis, we observe relatively decreased accuracy of root delineation as well as the added challenge of accounting for congenital anomalies such as supernumerary teeth, which may occur in approximately 1% of the population. [12][13][14] The tooth-contouring atlas includes a subject with dental artefacts (i.e. fillings), however, the study data set excluded individuals with dental fillings, orthodontic appliances or implants to minimize confounding variables.…”