School of Oral Health Sciences
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Item A comparative sem study of keratinized and non-keratinized oral mucosa of the vervet monkey(1981) Grossman, E. S.; Cleaton-Jones, P. E.Scanning electron microscopy has revealed that the surfaces of keratinized and non-keratinized oral epithelial cells have characteristic features which enable these tissue types to be readily distinguished. These features include pits, villus-like projections and ridge-like folds called microplications. The origin and functional significance of these structures is not known, although several hypotheses have been proposed. Microplications have been interpreted as a reserve area for cell stretching but further studies have yielded conflicting results. Cellular interdigitation resulting from the microplications may aid adhesion between the stratified epithelial cells. This view has been supported by subsequent investigations of superficial epithelial cells. The situation in the deeper cell layers is not entirely clear.Item Hypocalcification and hypoplasia in primary teeth of pre-school children from different ethnic groups in South Africa(1989) Hargreaves, J. A.; Cleaton-Jones, P. E.; Roberts, G. J.; Et alA study was completed in 1985/86 which examined the dental health of pre-school children from different ethnic groups and communities in South Africa: rural black, urban black, urban colored, urban Indian, and urban white. Enamel defects were recorded in primary teeth by use of the HHI, an index developed to measure hypocalcification and hypoplasia of enamel. The findings showed that colored children had the greatest number of enamel defects. The teeth most commonly affected were the maxillary anterior teeth and mandibular molar teeth. It is suggested that further epidemiological studies utilizing the HHI should be undertaken in pre-school children, especially from developing countries, to gain more information on the causes of enamel defects in the primary dentition and the possible use of such findings to predict nutritional health of individuals.Item Hypocalcification and hypoplasia in permanent teeth of children from different ethnic groups in South Africa assessed with a new index(1989) Hargreaves, J. A.; Cleaton-Jones, P. E.; Williams, S. D. L.A new descriptive index, the HHI (hypocalcification-hypoplasia index), is described for comparing enamel defects in groups of people. The index was used in a study completed in 1986, in which 1251 11-year-old children from different ethnic groups resident in South Africa were examined: 210 rural black, 203 urban black, 206 urban colored, 426 urban Indian, and 206 urban white. The index can be used as a screening examination, and the results from these different ethnic groups are presented.Item The effect of frozen irradiated bone homografts on the healing of defects in the mandible and femur of the rat(1971) Cleaton-Jones, P. E.; Retief, D. H.; Maier, G.1. The effects of frozen irradiated homogenous bone grafts on the healing of circumscribed defects in the mandibles and femora of forty albino rats have been studied. 2. The grafts were well tolerated by the host animals and did not appear in any way either to stimulate or to inhibit osteogenesis. The rate of healing of the defects containing the homografts compared favourably with that of the control defects.Item Delayed passive eruption - A predisposing factor to Vincent's Infection?(1974) Volchansky, A.; Cleaton-Jones, P. E.Item Rampant caries and labial caries - synonyms?(1977) Richardson, B. D.; Cleaton-Jones, P. E.Item Activation analysis in biological material(1975) Turkstra, J.; Retief, D. H.; Cleaton-Jones, P. E.Item Comparison of milk consumption and its contribution to total sugar intake in South African and other schoolchildren(1987) Richardson, B. D.; Sinwel, R. E.; Cleaton-Jones, P. E.Item Hepatitis-B virus infection and the dental profession: a survey in the Witwatersrand area(1981) Lownie, J. F.; Cleaton-Jones, P. E.; Struthers, P. J.; et al.Item The bearing of dietary sucrose on the deciduous dentition of pre-schoolchildren in the Traansvaal(1979) Richardson, B. D.; Cleaton-Jones, P. E.
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