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| 1 | Surface roughness of zirconia for full-contour crowns after clinically simulated grinding and polishing显示文摘The aim of this study was to evaluate the effect of controlled intraoral grinding and polishing on the roughness of full-contour zirconia compared to classical veneered zirconia. Thirty bar-shaped zirconia specimens were fabricated and divided into two groups(n515). Fifteen specimens(group 1) were glazed and 15 specimens(group 2) were veneered with feldspathic ceramic and then glazed. Prior to grinding,maximum roughness depth(Rmax) values were measured using a profilometer, 5 times per specimen. Simulated clinical grinding and polishing were performed on the specimens under water coolant for 15 s and 2 N pressure. For grinding, NTI diamonds burs with grain sizes of 20 mm, 10 mm, and 7.5 mm were used sequentially. The ground surfaces were polished using NTI kits with coarse, medium and fine polishers. After each step, Rmaxvalues were determined. Differences between groups were examined using one-way analysis of variance(ANOVA). The roughness of group 1 was significantly lower than that of group 2. The roughness increased significantly after coarse grinding in both groups. The results after glazing were similar to those obtained after fine grinding for non-veneered zirconia. However, fine-ground veneered zirconia had significantly higher roughness than venerred, glazed zirconia. No significant difference was found between fine-polished and glazed zirconia, but after the fine polishing of veneered zirconia, the roughness was significantly higher than after glazing.It can be concluded that for full-contour zirconia, fewer defects and lower roughness values resulted after grinding and polishing compared to veneered zirconia. After polishing zirconia, lower roughness values were achieved compared to glazing; more interesting was that the grinding of glazed zirconia using the NTI three-step system could deliver smooth surfaces comparable to untreated glazed zirconia surfaces. | Rim Hmaidouch Wolf-Dieter Mller Hans-Christoph Lauer Paul Weigl | 2014 | International Journal of Oral Science2014，6，4： | 2 |
| 2 | Disruption of biofilms from sewage pipes under physical and chemical conditioning显示文摘Biofilms grown inside two sewage collecting pipes located in industrial and residential areas are studied. Bacterial biomass inside three layers of biofilms was evaluated. Biofilm cohesion under different mixing rate and ionic strength was also investigated. Effects of physical and chemical parameters in the biofilms were evaluated by monitoring turbidity,chemical and biochemical oxygen demands. Extracted organic matter from biofilms was partitioned to polar,aromatic and saturated fractions using activated silica column chromatography. Results revealed that bacterial biomass growth depending on biofilm thickness and stratification. The most loaded stratum in bacterial biomass was the sewage-biofilm interface stratum that represented 51% of the total bacterial biomass. Stirring rate and ionic strength of mono-and bivalent salts showed a major influence in biofilm disruption. The stirring time enhanced the exchange dynamic and matter capture between biofilm fragments at the critical stirring rate 90 r/min. Sodium chloride showed the dispersing effect on biofilms in suspension,and decreased the BOD5(biochemical oxygen demand) beyond the physiological salt concentration. | Charbel Mahfoud Antoine El Samrani Rita Mouawad Walid Hleihel Rim El Khatib Bruno S. Lartiges Nam Ouani | 2009 | Journal of Environmental Sciences2009，21，1： | 2 |
| 3 | Competition and Inhibition of Sulfate Reducers and Methane Producers in Anaerobic Treatment显示文摘 | Chio E Rim J M | | 0，，： | 1 |
| 4 | Anti-synchronization of Chaotic Oscillator显示文摘 | Kim C M Rim S Kye W H | 2003 | Phys Lett A2003，320，1： | 1 |
| 5 | Trends in breast cancer screening and diagnosis显示文摘 | Rim A Chellman-Jefers M | 2008 | Cleve Clin J Med2008，75，1： | 1 |
| 6 | Competition and inhibit ion of sulfate reducers and methane producers in anaerobic treatment显示文摘 | Chio E Rim J M | 1991 | Wat Sci Technol1991，23，： | 1 |
| 7 | Strain rate dependence of deformation behavior of high - nitrogen austenitic steels 显示文摘 | Rim Y S Nama S M Kim S J | | Journal of Materials Processing Technology0，，： | 1 |
| 8 | A high-speed, highsensitivity silicon lateral tranch phtodetector显示文摘 | M Yang K Rim D L Rogers | 2002 | IEEE Electron Device Letters2002，23，7： | 1 |
| 9 | Multi-user downlink beamforming with multiple transmit and receive antennas显示文摘 | Rim M | 2002 | Electron Letter2002，38，25： | 1 |
| 10 | Competitiom and inhibition of sulfate reducers and methane producers in anaerobic treatment显示文摘 | Choi E Rim J M | 1991 | Wat Sci Tech1991，23，8： | 1 |
| 11 | Disordered molecular siever with branched mesoporous channel network显示文摘 | Ryoo R Rim J M Ko C H | | 0，，45： | 1 |
| 12 | Competition and inhibition of sulfate reducers and methane producers in anaerobic treatment显示文摘 | CHIO E RIM J M | 1991 | Wat Sci Technol1991，23，： | 1 |
| 13 | Humanpapillmavirus genotyping by HPV DNA chip in cervical cancer and precancerous lesions显示文摘 | Lee G Y Kim S M Rim S Y | 2005 | Int J Gyneml Cancer2005，15，1： | 1 |
| 14 | Design of almost minimax FIR filters in one and two dimensions by WLS techniques显示文摘 | ALGANI V SUK M RIM C | 1986 | IEEE Trans CAS1986，33，6： | 1 |
| 15 | Anti-synchronizati on of chaotic oscillators显示文摘 | Kim C M Rims S Key W H | 2003 | Physics Letters A2003，，320： | 1 |
| 16 | Optimal and heuristic algorithms for solving the binding problem 显示文摘 | Rim M Majumdar A | 1994 | IEEE Transactions on VLSI Systems1994，2，7： | 1 |
| 17 | Anti-synchronization of chaotico scillators显示文摘 | Kim C M Rim S W Kye W H | 2003 | Physics Letters A2003，320，1： | 1 |
| 18 | Transition of latecomer finns from technology users to teehnology generators:Korean semieonductor firms 显示文摘 | Choung J Y Hwang H R Choi J H Rim M H | 2000 | World Development2000，28，5： | 1 |
| 19 | Pharmaeotherapy of the depressed patient with cardiovascular and/or eerebrovascular illness 显示文摘 | Lane RIM Sweeney M Henry JA | 1994 | Br J Clin Praet1994，48，5： | 1 |
| 20 | Recovery of volatile organic flavor compounds by pervaporation 显示文摘 | Song K H Lee K R Rim J M | 2004 | Journal of Chemical Engineering of Japan2004，37，1： | 1 |
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