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Results for “tooth anomalies”

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At least 19 recordsLinked to original sources

PubMed2001

Congenital tooth anomalies and malocclusions: a genetic link?

The aim of the present study was to investigate putative relationships between different malocclusions such as Class III and Class II division 1, and congenital tooth anomalies. Two-hundred Class III and 215 Class II division 1 patients were examined for the presence of any of the following congenital tooth anomalies: maxillary incisor hypodontia, maxillary canine impaction, transpositions, supernumerary teeth, and tooth agenesis. Their occurrence rates were then calculated as a percentage of the total sample and were compared for statistical differences. The results revealed no statistical difference (P > 0.05) in the occurrence rates of upper lateral incisor agenesis, peg-shaped laterals, impacted canines, or supernumerary teeth between the Class III and the Class II division 1 malocclusions. When the occurrence rate of all congenital tooth anomalies was compared between the two malocclusions, Class III subjects showed significantly higher rates (P < 0.05). Comparison with published surveys on general populations showed similar occurrence rates. It can be concluded that subjects with Class III and Class II division 1 malocclusions show patterns of congenital tooth anomalies similar to those observed in the general population. Congenital tooth anomalies may represent another criterion for the study of malocclusion, with respect to their origin and development.

Adolescent↗

PubMed2000

Tooth anomalies associated with failure of eruption of first and second permanent molars.

The occurrence of tooth anomalies in association with failure of the first and second molars to erupt was assessed in a sample of 1520 nonsyndromic subjects with uncrowded dental arches (mean age, 14 years 4 months) and compared with the prevalence rate calculated in a matched control group of 1000 subjects. The tooth anomalies examined included infraocclusion of deciduous molars, palatal displacement of maxillary canines, rotation of maxillary lateral incisors, aplasia of second premolars, and small size of maxillary lateral incisors. Associations among arrested eruption of first and second permanent molars and anomalies in tooth eruption and position (infraoccluded deciduous molars, palatally displaced canines, rotated maxillary lateral incisors) were highly significant (P <. 001). No significant association was found among the occurrence of molar eruption disturbances, aplasia of premolars, and small-sized laterals. These findings point to a common biologic cause for the appearance of failure of eruption of molar teeth and other disturbances in tooth eruption and position, most likely under genetic influence.

Adolescent↗

PubMed1998

A clinical and statistical study of etiologic aspects related to associated tooth anomalies in number, size, and position.

BACKGROUND: The study was aimed to reveal patterns of association among five types of dental anomalies (aplasia of second premolars, small size of maxillary lateral incisors, infraocclusion of primary molars, ectopic eruption of first molars, and palatal displacement of maxillary canines) in an untreated orthodontic population, aged 7-14 years. METHODS: The prevalence of associated tooth anomalies in five groups of 100 subjects each and characterized by the constant presence of one primarily diagnosed dental anomaly was compared to the prevalence for the examined dental anomalies in a control group of 1,000 subjects, deriving from a common initial sample of 4,850 subjects. RESULTS: Significant reciprocal associations (p < 0.008) were found among four dental anomalies (aplasia of second premolars, small size of maxillary lateral incisors, infraocclusion of primary molars, and palatal displacement of maxillary canines), suggesting a common genetic origin for these conditions. Ectopic eruption of first molars appeared to be a rather separate pathological entity with respect to all other examined tooth anomalies. CONCLUSIONS: The statistically demonstrated existence of associations among different tooth anomalies is clinically relevant, since the diagnosis of those anomalies that appear earlier may indicate potential risk for later developing tooth and eruption disturbances.

Adolescent↗

PubMed2000

The Class II Division 2 craniofacial type is associated with numerous congenital tooth anomalies.

The aim of the present study was to examine whether a putative relationship exists between the Class II division 2 craniofacial type and congenital anomalies of the dentition, such as missing teeth, peg-shaped laterals, transpositions, supernumerary teeth and canine impactions. Two hundred and sixty-seven untreated patients with Class II division 2 malocclusion were examined. The results show that 56.6 per cent of the patients exhibited some form of congenital tooth anomaly, 13.9 per cent agenesis of the upper lateral incisors, 7.5 per cent peg-shaped upper laterals, while impacted canines were present in 33.5 per cent of the subjects. Transpositions were present in 1.1 per cent of the patients and in all cases the canine was involved. No patient exhibited a supernumerary tooth. Comparing the results of the present study with existing data on the percentage of congenital tooth anomalies in the general population, it can be concluded that Class II division 2 malocclusions are closely associated with congenital tooth anomalies.

Adolescent↗

PubMed2000

[Pili trianguli et canaliculi. A case report of uncombable hair in relation to atopic eczema and tooth anomalies].

We report on a child with pili trianguli et canaliculi. This hair shaft abnormality belongs to a heterogeneous group of diseases which are included under the synonym uncombable hair. The diagnosis was confirmed by scanning electron microscopy, revealing hair shafts with a characteristic longitudinal groove. In addition the girl suffered from atopic eczema and tooth anomalies. Our findings suggest that this disorder could represent a tricho-odontal subtype of ectodermal dysplasia.

Biotin↗

PubMed1984