News Column

Studies from C. Sachs and Colleagues Yield New Information about Dentistry (Full-arch prostheses from translucent zirconia: Accuracy of fit)

September 10, 2014

By a News Reporter-Staff News Editor at Biotech Week -- Data detailed on Dentistry have been presented. According to news reporting out of Munich, Germany, by NewsRx editors, research stated, "The aim of this study was to evaluate the marginal and internal fit of single crowns, compared to 14-unit frameworks made of translucent yttria-stabilized zirconia. We hypothesized that there is an influence of the type of restoration on the marginal and internal fit."

Our news journalists obtained a quote from the research, "Eight teeth (FDI locations 17, 15, 13, 11, 21, 23, 25 and 27) of a typodont maxillary model were provided with a chamfer preparation to accommodate a 14-unit prosthesis or four single crowns (SCs). Ten 14-unit fixed dental prostheses (FDPs) and 40 single crowns were fabricated using a computer aided design (CAD)/computer aided manufacturing (CAM) system with pre-sintered translucent yttria-stabilized zirconia blanks. The restorations were cemented onto twenty master dies, which were sectioned into four pieces each. Then, the marginal and internal fits were examined using a binocular microscope. In order to detect the differences between the two types of restorations a non-parameteric test (Mann-Whitney-U) was carried out; to detect differences between the abutment teeth and the abutment surfaces non-parametric tests (Kruskal-Wallis) and pairwise post hoc analyses (Mann-Whitney-U) were performed after testing data for normal distribution (method according to Shapiro-Wilk). Level of significance was set at 5%. The mean (SD) marginal opening gap dimensions were 18iirn (14) for the single crowns and 29iirn (27) for the 14-unit FDPs (p

According to the news editors, the research concluded: "However, both restorations showed clinically acceptable marginal and internal fit."

For more information on this research see: Full-arch prostheses from translucent zirconia: Accuracy of fit. Dental Materials, 2014;30(8):817-823. Dental Materials can be contacted at: Elsevier Sci Ltd, The Boulevard, Langford Lane, Kidlington, Oxford OX5 1GB, Oxon, England. (Elsevier -; Dental Materials -

Our news journalists report that additional information may be obtained by contacting C. Sachs, Stadelmann Dental, Munich, Germany. Additional authors for this research include J. Groesser, M. Stadelmann, J. Schweiger, K. Erdelt and F. Beuer (see also Dentistry).

Keywords for this news article include: Munich, Germany, Europe, Dentistry

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Source: Biotech Week

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