Research Outputs (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 Analyses of marginal seals in aged amalgam restorations using extraction replicas(1984) Grossman, E. S.; Witcomb, M. J.; Jodaikin, ASince dental amalgam does not bond chemically to tooth structure, a microcrevice is present at the amalgam/tooth interface of a freshly placed restoration. This gap is of sufficient width to allow fluids and microorganisms to pass along the cavity walls and thereby facilitating the recurrence of dental caries, which accounts for the majority of amalgam restoration replacements.Item Experimental marginal leakage around dental amalgams placed in artificial cavities(1984) Jodaikin, A.; Grossman, E. S.Experimental marginal leakage of high- and low-Cu amalgam restorations placed in acrylic teeth, where the cavities were untreated or painted with denatured collagen and/or a CaP slurry, was assessed after specimens were stored in a 1% NaCl solution for ten days and for one yr. All specimens stored for ten days showed severe marginal leakage. High- and low-Cu amalgam restorations placed in untreated acrylic teeth cavities formed seals after a storage period of one yr, indicating that these materials are able to form a seal without interacting with a natural tooth cavity interface. Cavities treated with denatured collagen also formed seals in the long-term group. It was apparent that, when the CaP slurry was used, generally more leakage resulted after the year's storage period than when amalgam restorations were placed in uncoated acrylic cavity surfaces or in those painted with denatured collagen.Item A proposed function for microplications on epithelial cells(1983) Grossman, E. S.Item A comparative study of the cellular response of the oral mucosa to mechanical loading(1981) Grossman, E. S.; Austin, J. C.Item Alveolar dehiscence and fenestration in dried South African Negro maxillae(1981) Volchansky, A.; Vieira, 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 Comparison of three anaesthetic scavenging devices using cuffed and non-cuffed nasal endotracheal tubes during dental anaesthesia(1981) Moyes, D.; Cleaton-Jones, P.; Shaw, R.; et alItem Partial denture teaching programmes presented to undergraduate students at Dental Schools in the Republic of South Africa(1982) Collis, J.; Slabbert, J. C. G.; Cleaton-Jones, P. E.; et al.