Eliecer Eidelman

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.

Oral manifestations of Morquio's syndrome.

The clinical and laboratory findings in two siblings affected with Morquios syndrome are described. The oral findings, consisting of disturbances in the structure of the enamel in both deciduous and permanent teeth, resemble those of amelogenesis imperfecta, Type 1. Preformed crowns are recommended as the initial treatment, in order to avoid loss of vertical height. The dentists familiarity with the oral manifestations of Morquios disease may contribute to the early detection of this condition.

Ellis-Van Creveld syndrome: Report of a case

Abstract The case of an 8-year-old girl has been presented. The patient showed oligodontia and absence of mucolabial folds, dwarfism, polydactylia, and congenital heart disease, together with a number of minor abnormalities. The childs parents were closely related. The condition known as Ellis-Van Crevelds syndrome is thought to be a recessive hereditary characteristic.

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.

Effect of desalivation on the ash, calcium, phosphorus, and fluoride content of enamel of molars in hamsters.

The posteruptive maturation of enamel surface has been ascribed to an ionic exchange with saliva (R. J. FANNING, J. H. SHAW, and R. F. SOGNNAES, JADA 49:668, 1954). T. Yonan, J. Nicolau, and L. S. Fosdick (J Dent Res 45: 1701, 1966) reported a posteruptive formation of an acid-resistant layer of tooth enamel in hamsters. In the present study, the ash, calcium, phosphorus, and fluoride content of enamel of molars from a group of desalivated and nondesalivated hamsters was compared. Forty golden male hamsters, 27 days old, were equally divided into an experimental group and a control group. Under intraperitoneal anesthesia, the former group was desalivated by surgical extirpation of the submaxillary and sublingual glands and ligation of the parotid ducts. All animals were kept on a laboratory Purina* chow diet, fresh vegetables, and tap water ad libitum for 40 days. The animals were weighed and killed, the heads were separated, and the maxilla and mandible were removed and cleaned from soft tissue. All molars were examined under a low-power microscope for presence of various lesions. The molars were extracted, and every molar group was separate-