Hypodontia, hyperodontia, and double formation of primary teeth in Iceland An epidemiological study

Magnusson, Thordur Eydal

doi:10.3109/00016358408993864

Cited by 39 publications

(47 citation statements)

References 5 publications

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“…Existing studies have focused particularly on the epidemiological descriptions of the prevalence of the condition. Thus, Grahnkn & Granath [l] found a prevalence of @4%, and in subsequent studies Ravn [2], Jarvinen & Lehtinen [3] and, later, Magnusson [4], reported prevalences of @5%, 0.9% and @5%, respectively. In these studies, attention was also given to the types of teeth most frequently affected by agenesis, and, generally, agenesis of maxillary lateral incisors was most frequent.…”

Section: Introductionmentioning

confidence: 95%

Pattern of agenesis in the primary dentition: a radiographic study of 193 cases

Daugaard‐Jensen

Nodal

Kjær

1997

Int J Paed Dentistry

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Summary. The purpose of this study was to examine radiographs of a large sample of children who had congenital absence of primary teeth and to determine the number and distribution of the missing teeth. Radiographs collected within the Danish Municipal Child Oral Health Care System were available of 193 children, all of whom had congenital absence of one or more primary teeth but no other abnormalities in the jaws or dentition. More than half of the children (54.9%) had agenesis of only one primary tooth, and 7.8% of more than two primary teeth. Agenesis was found twice as frequently in the maxillary lateral incisor region (119 children) than in the mandibular lateral incisor region (53 children). Congenital absence of primary molars, canines and maxillary central incisors was extremely rare. However, agenesis of one maxillary primary central incisor was found in two cases. A follow‐up study will compare the agenesis patterns recorded with the pattern of agenesis in the permanent dentition of the same group of children. Résumé. Modéle d'agénésies dans la dentition temporaire: étude radiographique de 193 cas Le but de cette étude a été d'examiner les radiographics d'un large échantillon d'enfants qui avaient une absence congénitale de dents temporaires et de déterminer le nombre et la distribution des dents manquantes. Les radiographics collectées dans un centre de santé dentaire municipal danois concernaient 193 enfants, tous ayant une absence congénitale d'une ou plusieurs dents temporaires mais pas d'autres anomalies des maxillaires ou des dents. Plus de la moitié des enfants (59%) avait une agénésie d'une seule dent temporaire et 7.8% de plus de deux dents temporaires. Une agénésie a été trouvée deux fois plus fréquemment dans la région de l'incisive latérale maxillaire supérieure (119 enfants) que dans la région de l'incisive latérale mandibulaire (53 enfants). L'absence congénitale de molaires temporaires, canines et incisives centrales maxillaires était extrêmement rare. Mais l'agénésie d'une incisive centrale temporaire maxillaire a été trouvée dans deux cas. Une étude à venir comparera les modéles d'agénésies enregistrées avec les modéles d'agénésies dans la dentition permanente de ce même groupe d'enfants. Zusammenfassung. Nichtanlagen im Milchgebiss ein röntgologische Studie von 193 Fällen Der Zweck dieser Studie war bei einer grossen Anzahl von Kindern mit Nichtanlagen, die Röntgenbilder zu prüfen und festzustellen die Anzahl, und die Verteilung der fehlenden Zähne. Röntgenbilder von 193 Kinder des dänischern städtischen Oralen Gesundheits Systemes wurden ausgewählt für dieses Studie. Es wurde mindesten die Nichtanlage von einem Milchzahn festgestellt aber ohne jegliche weitere Missbildung der Zähne oder Kiefer. Bei mehr als die Hälfte der Kinder (54.9%) fand man die Nichtanlage eines einzelnen Milchzahnes und bei 7.8% mehr als 2 Milchzähne. Die Nichtanlagen waren doppel so heufig in der maxillären lateralen Frontzahn‐Region. Die Nichtlage von Milchmolaren, Eckzähne und von zentralen oberen Schneidezä...

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Section: Introductionmentioning

confidence: 95%

Pattern of agenesis in the primary dentition: a radiographic study of 193 cases

Daugaard‐Jensen

Nodal

Kjær

1997

Int J Paed Dentistry

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“…Double teeth is a term that describes both gemination of one tooth, which is the partial division of a single dental germ [12,13], and fusion of two teeth, which is the partial union of two different dental germs [13,14]. The prevalence rate for double teeth in the primary dentition varies from 0.5 to 1.6% [5,9], while it has been reported to be 0.3% in the permanent dentition [15,16]. Double teeth were reported to be 75% of the cases of dental anomalies in the primary dentition, with 94% of fusions and 6% of geminations [17].…”

Section: Introductionmentioning

confidence: 99%

“…Lateral incisors are most commonly involved [6], whereas the duplication of canines is a very rare occurrence [3]. Hypodontia is the lack of one or more teeth with a prevalence rate in the permanent dentition ranging from 0.4 to 0.9% in European populations [3][4][5][7][8][9], while it is more diffuse in Japanese children (2.4%) [10]. The prevalence rate of hypodontia of the primary teeth is smaller, and it approximates 0.3-0.8% [3,11].…”

Section: Introductionmentioning

confidence: 99%

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Dental anomalies in the primary dentition and their repetition in the permanent dentition: a diagnostic performance study

et al. 2011

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This study investigated the recurrence in the permanent dentition of dental anomalies of the primary dentition. A sample of 189 subjects (100 males, 89 females, mean age of 5 years and 7 months) with anomalies of primary teeth (tooth hypodontia, supernumerary teeth, geminated teeth, and fused teeth) was selected and re-analyzed at a mean age of 11 years and 2 months for the recurrence of the dental anomalies in the permanent dentition. As a control group, 271 subjects (123 males, 148 females) without dental anomalies in the primary dentition were selected. The recurrence in the permanent dentition of the dental anomalies in the primary dentition was evaluated by measures of diagnostic performance. The results showed high values for the repetition of hypodontia (positive likelihood ratio = 102.0); low score for the repetition of hyperdontia (positive likelihood ratio = 6.5); low positive likelihood ratio (9.1) for gemination of primary teeth resulting in supernumerary permanent teeth; high positive likelihood ratio (47.0) for fusion of primary teeth followed by missing permanent teeth. Dental anomalies in the primary dentition are associated with an increased likelihood of anomalies of the succedaneous permanent.

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“…If the fusion takes place in the advanced stage of morph-differentiation, it may be limited to the roots, meaning the fused teeth might have separate pulp chambers and root canals [3,4]. Primary fused teeth (PFT) usually occur unilaterally [5,6] and are more common in primary than in permanent dentition [2,7,8]. They nearly always occur in the anterior region, and most often involve the mandibular lateral incisors and canines; occurrence in the posterior region is rare [9,10].…”

Section: Introductionmentioning

confidence: 99%

Primary Fused Teeth and Findings in Permanent Dentition

2018

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Objective: The aim of this study was to investigate the characteristics of primary fused teeth (PFT) and their effect on permanent dentition in a group of Turkish children. Subjects and Methods: Dental records of 13,450 pediatric patients who attended the Pediatric Dental Clinic in northern Turkey between 2015 and 2017 were reviewed. Forty patients had been diagnosed with PFT and were included in the study. Clinical and radiographic examinations were conducted, and the distribution of PFT was calculated by type, sex, affected jaw, associated dental anomalies, and clinical complications. Data analysis involved descriptive statistics. Results: A total of 50 PFT were detected in the 40 patients. The mean age of patients was 6.7 ± 0.3 years (range 3–10 years). The most common PFT were the mandibular lateral incisors and canines (34, 68%). The most prevalent type of PFT was type III (20, 40%). Of the 40 patients with PFT, 34 (85%) also exhibited other dental anomalies such as tooth aplasia, peg-shaped incisors, talon cusps, ectopic eruption, and delayed eruption in both related and unrelated areas. The most common complications of PFT were fusion-related tooth aplasia (n = 26 [76%]) and caries formation in the affected teeth (24 [48%]). Conclusion: In this study, PFT were frequently observed in the mandibular anterior region. Caries formation and dental anomalies, especially permanent tooth aplasia, were often encountered in areas where PFT were seen. Hence, parents should be informed about possible dental problems associated with PFT and be encouraged to schedule regular follow-up appointments.

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Hypodontia, hyperodontia, and double formation of primary teeth in Iceland An epidemiological study

Cited by 39 publications

References 5 publications

Pattern of agenesis in the primary dentition: a radiographic study of 193 cases

Pattern of agenesis in the primary dentition: a radiographic study of 193 cases

Dental anomalies in the primary dentition and their repetition in the permanent dentition: a diagnostic performance study

Primary Fused Teeth and Findings in Permanent Dentition

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