Research Outputs (Oral Health Sciences)
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Item Failure at the dental restorative-etched enamel interface(1973) Retief, D. H.Item Failure at the dental restorative etched enamel interface(1973) Retief, D. H.None of the restorative materials available to the dental profession adhere to tooth structure. The bonding of these materials could be greatly increased by etching the enamel surface prior to the placement of the restorative material. Conditioning of the enamel surface with phosphoric acid or an attenuated phosphoric acid solution is now an accepted procedure and widely applied in restorative and preventive dentistry.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 Intercellular junctions in the attached gingiva and alveolar mucosa in the vervet monkey (cercopithecus aethiops)(1979) Grossman, E. S.; Austin, J. C.; Cleaton-Jones, P.This study was undertaken to determine the distribution of hemidesmosomes on the basal cell membranes adjacent to the basement lamina and the spinous cell membranes on unloaded keratinized AG and non- keratinized AM.Item Ultrastructural features of exfoliating surface cells in keratinised and non-keratinised oral mucosa(1979) Austin, J. C.; Grossman, E. S.; Cleaton-Jones, P.Healthy keratinised and non-keratinised oral mucosa (attached gingiva and alveolar mucosa) were obtained from 6 adult vervet monkeys, fixed in situ by simultaneous perfusion and immersion fixation using cacodylate buffered 2,5% glutaraldehyde and prepared for examination by SEM and TEM.Item The relation between the action of vitamin E and protein in the body, and the influence of various fish-liver oils in the diet upon vitamin E activity in vivo(1955) Irving, J. T.; Budtz-Olsen, O. E.Item Alkali resistant haemoglobins from normal and sickle cell bloods(1955) Anderson, C. G.Item The relation between the action of vitamin E and protein in the body, and the influence of various fish-liver oils in the diet upon vitamin E activity in vivo(1955) Irving, J. T.; Budtz-Olsen, O. E.The experiments reported here were undertaken primarily to investigate further the histological changes occurring in the enamel organ of the rat’s incisor tooth during vitamin E deficiency. These changes were originally described by Irving (1942) and have been confirmed in general by Granados, Mason & Dam (1945, 1946) and by Pindborg (7950, 1952). It was, however, found by the present writers, usinga diet based on that of Gillman, Gilbert, Gillman & Spence (1952), that extreme changes in the enamel organ, avertable by vitamin E, could be produced in 21 days or less, whereas the changes described by the other authors took much longer to develop and were less extensive. In an attempt to determine further the effects of other dietary factors upon the enamel organ, certain additional findings seemed to be of significance. The present paper is concerned chiefly with these, and an account of the histological aspect is being prepared for publication. In particular it was found that the vitamin content of the oil containing highly unsaturated fatty acids was of importance and also that the actions of protein and vitamin E, which superficially appeared similar, differed in certain fundamental respectsItem Sectioning of the inferior dental nerve in rats(1969) Retief, D. H.; Dreyer, C. J.