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 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 Relationship between fluoride concentration in enamel, DMFT Index, and degree of fluorosis in a community residing in an area with a high level of fluoride(1976) Bischoff, J. I.; Van Der Merwe, E. H. M.; Retief, D. H.; et al.The DMFT index, degree of fluorosis (DEGF), fluoride concentration in enamel (F), and depth of etch (D) were determined in participants living in an area with a high fluoride level. A statistically significant difference was found between men and women for F and D. A significant correlation was established between F and DEGF and between F and age for men, but not for women.Item Activation analysis in biological material(1975) Turkstra, J.; Retief, D. H.; Cleaton-Jones, P. E.Item The fluoride concentration in the enamel of permanent central incisors(1971) Barbakow, F. H.; De Kock, A. C.; Retief, D. H.Item An in vivo evaluation of an lontophoretic Technique for increasing the surface fluoride content in enamel(1973) Barbakow, F. H.; van der Merwe, E. H. M.; Scanes, S. G.; et alSurface enamel fluoride concentrations were determined in IS subjects before and after topical fluoride applications. These IS subjects were divided into 2 groups, one of which received the fluoride applications iontophoreti- cally whereas the control group had the identical fluoride applications without the use of the current. The results indicate that the greatest increase in fluoride concentrations resulted after 3 applications done at weekly intervals when the iontoplioretic technique was employed. Two iontophoretic fluoride applications with an interval of a week between them resulted in a less marked increase whereas no increase was observed when fluoride was applied once only. The increase in the fluoride concentration of the surface enamel was not as significant when the fluoride was applied without the use of current.Item The effect of New Tubulicid® on smear layer removal(1982) Vieira, E.; Jodaikin, A.; Austin, J.Item The mineral composition of enamel from two South African population groups(1979) Retief, D. H.; Turkstra, J.; Cleaton-Jones, P. E.; et al