Aubrey Chosack

Amelogenesis imperfecta among Israeli Jews and the description of a new type of local hypoplastic autosomal recessive amelogenesis imperfecta

Amelogenesis imperfecta (AI) was detected in nine of 70,359 school children surveyed, a prevalence approximating 1:8,000. Of these cases, eight were the hypoplastic type and one the snow-capped hypomaturation type. Family studies demonstrated that hypoplastic AI was an autosomal dominant trait in two children and an autosomal recessive in six. Of three additional families referred to our clinic, two had autosomal recessive hypoplastic AI and one the hypocalcified type, inherited as an autosomal dominant trait. In four families, a new type of local hypoplastic autosomal recessive AI was observed, characterized by horizontal pitting and grooving more pronounced in the middle third of the crowns of most teeth in both dentitions.

Hypodontia: a polygenic trait--a family study among Israeli Jews.

A high prevalence of hypodontia was detected among 820 first degree relatives of 305 probands and there was an increased risk if a second family member was affected. Hypodontia is a common trait in the population, and a deviation from normal sex ratio was observed in those affected. These results suggest a polygenic mode of inheritance.

Scrotal tongue and geographic tongue: Polygenic and associated traits☆

The familial nature of scrotal and geographic tongue was investigated in parents and siblings of 156 probands having these conditions. The prevalence in parents and siblings was significantly higher than that in the control populations. The prevalence in sibilings from families in which at least one parent was also affected was significantly higher than that in siblings from families in which neither parent was affected. The prevalence of scrotal tongue alone in siblins was similar irrespective of the condition in the proband. The prevalence of geographic tongue alone was highest in siblins of probands having only geographic tongue. A polygenic mode of inheritance with some genes common to both conditions is suggested.

A clinical evaluation of vitality tests in anterior teeth following fracture of enamel and dentin

Abstract The purpose of this study was to examine the diagnostic and prognostic value of vitality tests in teeth which had suffered Ellis Class II fracture and to examine whether root development, mobility, or sensitivity to percussion at the first visit influenced the results. Fifty-five children, 6 to 14 years of age, with seventy-nine traumatized teeth were included in this investigation. Ninety-five per cent of the teeth gave a positive response to vitality tests at the first visit. There was a better correlation between the status of the tooth, as evaluated clinically, with the electric pulp tests than with ethyl chloride.

Distribution of Caries in Different Tooth Surfaces in 7-Year-Old Children

The distribution of caries was examined in teeth of 204 7-year-old children. The distal surfaces of the first primary molars, the mesial and occlusal surfaces of the second primary molars and the occlusal surfaces of the first permanent molars showed a high degree of susceptibility to caries. The occurrence of caries was found to be highly dependent on the presence of caries on the adjacent proximal surfaces: a higher frequency of caries was found on the proximal surfaces when the adjacent proximal surfaces were carious. The frequency of caries on the proximal surfaces of the first and second primary molars was higher when occlusal caries were present.

Radiographic appearance of nutrient canals in the region of the erupting permanent maxillary cuspid.

A retrospective radiographic search was made for nutrient canals situated immediately inferior to the incisal tip of the unerupted permanent maxillary cuspid. In this study, the structure was observed radiographically in 35.4% of the children between the ages of 6 and 10 years, with an apparently greater incidence among girls.