Dental anomalies: prevalence and associations between them in a large sample of non-orthodontic subjects, a cross-sectional study

Abstract

BackgroundTo analyze the prevalence and associations between dental anomalies detectable on panoramic radiographs in a sample of non-orthodontic growing subjects.MethodsFor this cross-sectional study, digital panoramic radiographs of 5005 subjects were initially screened from a single radiographic center in Rome. Inclusion criteria were: subjects who were aged 8–12 years, Caucasian, and had good diagnostic quality radiographs. Syndromic subjects, those with craniofacial malformation, or orthodontic patients were excluded and this led to a sample of 4706 subjects [mean (SD) age = 9.6 (1.2) years, 2366 males and 2340 females]. Sample was subsequently divided into four subgroups (8, 9, 10, and 11–12 year-old groups). Two operators examined panoramic radiographs to observe the presence of common dental anomalies. The prevalence and associations between dental anomalies were also investigated.ResultsThe overall prevalence of dental anomalies was 20.9%. Approximately, 17.9% showed only one anomaly, 2.7% two anomalies, while only 0.3% had more than two anomalies. The most frequent anomalies were the displacement of maxillary canine (7.5%), hypodontia (7.1%), impacted teeth (3.9%), tooth ankylosis (2.8%), and tooth transposition (1.4%). The lower right second premolar was the most frequent missing teeth; 3.7% had only one tooth agenesis, and 0.08% had six or more missing tooth (Oligodontia). Mesiodens was the most common type of supernumerary tooth (0.66%). Two subjects had taurodontic tooth (0.04%). Tooth transpositions and displacement of maxillary canine were seen in 1.4 and 7.5%, retrospectively (approximately 69 and 58% were in the 8 and 9 year-old groups, retrospectively). Significant associations were detected between the different dental anomalies (P < .05).ConclusionsThe results of our study revealed significant associations among different dental anomalies and provide further evidences to support common etiological factors.Electronic supplementary materialThe online version of this article (doi:10.1186/s12903-017-0352-y) contains supplementary material, which is available to authorized users.

Prevalence of developmental dental anomalies in Serbian orthodontic patients

“…Thus, these teeth are frequently affected by agenesis (4.28-7.52%) which is in accordance with our results [4][5][6][7]18]. A rare occurrence of oligodontia was reported in the Italian population (0.08%) which is in agreement with our result (0.09%) [24]. Contrary to the high prevalence of hypodontia, supernumerary teeth are less frequently found in healthy individuals (0.5-3.8%).…”

“…Contrary to the high prevalence of hypodontia, supernumerary teeth are less frequently found in healthy individuals (0.5-3.8%). The prevalence of supernumerary teeth in our sample was 4.4%, slightly higher than in recent studies [24,25,26]. The etiological pattern of sex distribution in association with supernumerary teeth is the opposite of hypodontia [1].…”

Dentinogenesis imperfecta type II in Swedish children and adolescents

“…Another finding in the present study was tooth retention or impaction (third molars excluded) in 17% (2/12). A study by Lagana et al [21] reported an impaction prevalence of 3.9% in a group of 4706 aged 8−12-years. Retention of permanent second molars is a frequent finding in OI [5, 6, 22], but was not found in any individuals in this cohort.…”

Esthetic and functional management of an ankylosed central incisor with a conservative restorative approach

“…The prevalence of dental ankylosis has been reported to range from 2% to 5% depending on the population and type of dentition . Despite the relatively low reported prevalence, dental ankylosis can significantly affect esthetics and function when it occurs in a tooth that is not fully erupted.…”

“…4,5 The prevalence of dental ankylosis has been reported to range from 2% to 5% depending on the population and type of dentition. [6][7][8][9] Despite the relatively low reported prevalence, dental ankylosis can significantly affect esthetics and function when it occurs in a tooth that is not fully erupted. Successful management of dentoalveolar ankylosis in the esthetic zone often demands a multidisciplinary approach including orthodontics, periodontics, endodontics, and a full range of restorative options from conservative adhesive strategies to dentoalveolar surgery and implant-supported restorations.…”