Research Outputs (Oral Health Sciences)
Permanent URI for this collectionhttps://wiredspace.wits.ac.za/handle/10539/18776
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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 The effect of enamel etchants and a cleaning agent on cut dentine: an in vitro study(1985) Sparrius, O.; Grossman, E. S.Cavities 1,25 x 2,00mm were prepared in the cervical dentine of extracted human premolar teeth using a no. 577 tungsten carbide bur. The cavity depth was standardised at 1mm with the aid of a depth gauge fitted to the high speed airturbine. The cavities were hemisected with a low speed, water cooled, diamond disc saw, then cleaned with water and air. Thereafter the following solutions were applied to six cavities each as per manufacturers' instructions: Anhydron; Chemfill (Citric Acid); Enamelbond etchant and Scotchbond etchant gel. Once the cavities had been cleaned and dried, the specimens were prepared for scanning electron microscopy (SEM) and viewed at magnifications of x35, x200 and x2000. Cavity walls and floors were viewed separately and representative areas photographed. Similarly prepared unetched cavities served as a control.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 The Dental Research Institute at Wits 1954-1985(1985) Cleaton-Jones, P.Item Social class classification in the RSA - a comparison of four ethnic groups(1985) Richardson, B. D.; Cleaton-Jones, P. E.Item An investigation into the relationship of alveolar bone height and timing of canine retraction following premolar extraction(1983) Spruyt, J. L. L.; Cleaton-Jones, P.Item Dentists in the RSA, 1972 and 1982. A study of geographic spread and dentist to population ratios(1985) Smith, M.; Cleaton-Jones, P.Item A clinical appraisal of various aetiological factors involved in dry socket (Fibrinolytic Alveolitis)(1984) Bischoff, P. J.; Lownie, J. F.; Cleaton-Jones, P. E.Item Black and White pregnant women in Johannesburg, South Africa(1984) Rudolph, M. J.; Cleaton-Jones, P. E.