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Results for “Tooth Abnormalities”

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At least 811 records · Page 45Linked to original sources
PubMed1991

[Dental delay and microdontia in children with somatotropin hormone deficiency].

The clinical effects of growth hormone deficiency on dental development were studied in 27 young people aged 3.5-17.5 years, suffering from pituitary dwarfism. They presented with either a late selective eruption of premolars whose roots appeared normal or partial eruption of the whole permanent dentition. Premolar crowns were statistically significantly smaller while the other teeth were of normal size. The hormonal deficiency produced a decrease in the level of circulating growth factors and especially of EGF which may explain the anomalies of eruption and dental morphogenesis.

Adolescent↗
PubMed1991

In vitro study of the incidence of radicular grooves in maxillary incisors.

The purpose of this investigation was to determine the prevalence of radicular grooves in 500 central and 421 lateral extracted maxillary incisors. Radicular grooves were present in 2.0% of the central and 2.6% of the lateral maxillary incisors. The majority of radicular grooves in central maxillary incisors were detected on the buccal root surface (1.6%), and fewer on the lingual root surface (0.4%). In lateral maxillary incisors, the radicular grooves were always observed on the lingual surface.

Brazil↗
PubMed1991

[Anomalies of deciduous teeth and findings in permanent dentition].

Prevalence of anomalies of deciduous teeth has been analyzed in the general population of Zagreb preschool children. The sample comprised 2,987 children from 3 to 6 years of age (1,582 boys and 1,405 girls). Hypodontia was found in 0.47%, hyperdontia in 0.10%, and double teeth in 0.43% of total sample. Total prevalence of all anomalies in the sample was 1.0%. The sample for the analysis of permanent dentition has been enlarged with the clinical sample of children having the same anomalies and comprised 48 children. In all children with anomalies of primary teeth the orthopantomograms were taken and the status of permanent dentition was analyzed. In children with hypodontia in primary dentition hypodontia of permanent teeth was found in 100% of cases. Patients with hyperdontia of primary teeth displayed anomalies in permanent dentition in 85.7%, while in children with primary double teeth, anomalies of permanent teeth were present in 61.1% of cases. Missing deciduous teeth were found in both jaws in only 8.7% of cases, and in 34.8% in permanent dentition. Symmetrical occurrence of hypodontia of primary teeth (i.e. in both sides of jaws) was significantly higher in boys (56.3%) than in girls (28.6%). In permanent dentition symmetrical occurrence of hypodontia was significantly higher than in primary dentition (81.3% in boys and 57.1% in girls). The most frequently missing primary teeth were maxillary lateral incisors (48.8%) followed by mandibular central incisors (34.9%). Hyperdontia of primary teeth has been found only in boys, and it related only to the maxillary lateral incisors. Anomalies of deciduous teeth show a high degree of association with the finding in the permanent dentition.(ABSTRACT TRUNCATED AT 250 WORDS)

Anodontia↗
PubMed1991

[Dysostosis cleidocranialis--a case report].

An 18-year female patient with dysostosis cleidocranialis, treated for dental anomalies characteristic of her basic disease since the age of 12, is described. Delayed resorption of deciduous teeth and eruption of permanent teeth were recorded. At the age of 12, the patient had still had all deciduous teeth, with the exception of lower incisors and right upper mesial incisor. The presence of 11 succedaneous teeth, 7 in the maxilla and 4 in the mandible, had been recorded by X-ray. The treatment performed step by step is presented. Firstly, deciduous teeth were extracted, and a prosthesis for both the maxilla and mandible were constructed to stimulate eruption of permanent teeth. All supernumerary teeth from the jaws were also surgically removed. After the permanent tooth eruption had been accomplished, orthodontic treatment of these teeth was required and it has still been successfully performed. Thus, a conclusion is made that the treatment of dental anomalies should start at the time of normally expected deciduous tooth exfoliation.

Adolescent↗
PubMed1991

[Esthetic restorations and occlusal stress].

The purpose of this work is to value reconstructions on conoid, abraded and fractured elements made using an hybrid composite. Results have been excellent either functionally or aesthetically.

Composite Resins↗
PubMed1991

[Comparison of different types of cleft lip and palate in regards to dental anomalies and sexual incidence].

The present study addresses two questions. Does the incidence of dental anomalies differ among the four following types of cleft lip and palate: the isolated cleft palate, the unilateral cleft lip and palate, (right or left), and the bilateral cleft lip and palate. Furthermore is the sexual incidence comparable among the four above mentioned types? Radiographic records and complete family history of clefting of 156 patients with a complete cleft lip and palate were obtained from the Cleft Lip and Palate Teams of Ste-Justine Hospital. Patients in which the cleft was part of a syndrome were excluded from the study. According to the analysis of the data, the incidence of dental anomalies was relatively high, specifically as high as 92% for the bilateral cleft lip and palate. The sexual incidence differed among the four types.

Anodontia↗
PubMed1991

[The clinico-radiological assessment of dental anomalies with real and apparent numerical defects].

Dental anomalies involving real shortfall in the number of teeth (agenesis) or apparent deficiency (impaction) have been studied in a population sample including 700 national servicemen aged between 19 and 26, in the period April-August 1989. The study was carried out by means of careful objective examination and the systematic performance of orthopantomography showed that 5.14% of the population examined is affected by dental agenesis. The tooth most often involved in agenesis is the lateral maxillary incisor followed by the third mandibular molar, the second mandibular premolar and the second maxillary premolar. As regards apparent agenesis, the upper and lower wisdom teeth were the most frequently involved in physiological or pathological bone impaction (this event occurs in almost 50% of third molars). The maxillary cuspid is also impacted with some frequency. The data obtained were compared with those in the world literature.

Adult↗
PubMed1991

Restorative and endodontic management of an anomalous mandibular molar.

Morphologic variations of dental hard tissue should be recognized and considered during restorative procedures. Overlooking anomalies increases the potential for clinical complications. Amalgam was used erroneously in a patient when the presence of a paramolar structure was overlooked. The clinical complications that resulted from overlooking the anomaly led to restorative, endodontic, and periodontal failures. The present report describes the use of conservative endodontics and a cast restoration, taking into account the presence of the paramolar structure, to correct the case.

Adult↗
PubMed1990

[Analysis of deciduous tooth discoloration, before and after liver transplantation].

130 children aged between 5 months and 15 years were orally examined in our Department in view of preparation for hepatic pre-grafts, before being given a graft by Professor J.-B. Otte and his team at the Paediatric Surgery Department. 70% of these children age from 5 months to 3 years. We report here two cases of dysplasia and dyschromia, observable in young children, which appear to us to be particularly convincing.

Adolescent↗