Person: DENİZ, ŞULE TUĞBA
Loading...
Status
Kurumdan Ayrılmıştır
Organizational Units
4 results
Search Results
Now showing 1 - 4 of 4
Publication Metadata only The effect of home bleaching agents on the surface roughness of five different composite resins: A SEM evaluation(2016-05-01T00:00:00Z) Cengiz, Esra; Kurtulmus-Yilmaz, Sevcan; Ulusoy, Nuran; Deniz, ŞULE TUĞBA; Yuksel-Devrim, Ece; DENİZ, ŞULE TUĞBAThe aim of this study was to investigate the effect of hydrogen peroxide (HP) and carbamide peroxide (CP) on the surface roughness of five different composite resins using profilometer and scanning electron microscope (SEM). Thirty-six specimens (1mm thick, 10mm in diameter) of five composite resins were fabricated. Each composite group was equally divided into three subgroups as control, CP and HP. In control group, specimens were stored in daily refreshed distilled water during the 14-day testing period. In other groups, 10% HP (Opalescence Treswhite) and 10% CP (Opalescence PF) were applied and surface roughness values (Ra) of each specimen were measured with a profilometer at the end of 14 days. Additionally, SEM analysis was performed to evaluate the surface deformations of composite resins. Data were analyzed with Kruskal-Wallis and Mann-Whitney U tests. Ra values of composite groups exposed to bleaching agents were statistically higher than control group (p<0.05). There was no significant difference between Ra values after HP and CP application within each composite group while SEM micrographs showed higher surface alterations at HP group compared to CP. Among the composite resins tested, Ceram-X Mono revealed the lowest Ra values after CP and HP applications as seen at SEM images. Home bleaching agents increased the surface roughness of all composites. Except CP applied Ceram-X mono specimens, Ra values of all composite resins evaluated in this study exceeded the critical limit of 0.2m. Ceram-X mono was the least affected composite material after bleaching application. SCANNING 38:277-283, 2016. (c) 2016 Wiley Periodicals, Inc.Publication Metadata only Effect of bleaching agents and whitening dentifrices on the surface roughness of human teeth enamel(2013-05-01T00:00:00Z) Ozkan, Pelin; Kansu, Gulay; Ozak, ŞULE TUĞBA; Kurtulmus-Yilmaz, Sevcan; Kansu, Pelin; DENİZ, ŞULE TUĞBAObjective. The aim of this in vitro study was to evaluate the surface roughness of human enamel bleached with 10% carbamide peroxide or 10% hydrogen peroxide bleaching agents at different times and also subjected to different superficial cleaning treatments. Materials and methods. One hundred and forty flat enamel samples were divided into 14 groups, Group 1-Group 14 (G1-G14). G1-G7 were treated with 10% carbamide peroxide and different dentifrices, G8-G14 were treated with 10% hydrogen peroxide and different dentifrices (G1 and G8: not brushed as control groups; G2 and G9: brushed with Ipana (R) toothpaste; G3 and G10: brushed with Clinomyn (R) toothpaste; G4 and G11: brushed with Moos Dent (R) toothpaste; G5 and G12: brushed with Signal (R) toothpaste; G6 and G13: brushed with Colgate (R) toothpaste; G7 and G14: brushed without dentifrice). A profilometer was used to measure average roughness values of the initial surface roughness and at each 7-day-interval. The bleaching was performed for 6 h a day and the surface cleaning treatment was performed 3-times a day, 2 min each time, for 4 weeks. The samples were stored in distilled water during the test period. Results. Statistical analysis revealed significant differences in surface roughness values over time for all groups except G1 and G8 (not brushed). The results of the surface roughness of all groups were nearly the same. Conclusions. The bleaching with 10% hydrogen peroxide and 10% carbamide peroxide did not alter the enamel surface roughness, but when the bleaching treatment was performed combined with abrasive dentifrices, a significant increase in roughness values was observed.Publication Metadata only The effect of home-bleaching application on the color and translucency of five resin composites(2013-11-01T00:00:00Z) Kurtulmus-Yilmaz, Sevcan; Cengiz, Esra; Ulusoy, Nuran; Ozak, ŞULE TUĞBA; Yuksel, Ece; DENİZ, ŞULE TUĞBAObjectives: The aim of this study was to investigate the effect of home bleaching agents on the color and translucency of resin composites.Publication Metadata only Evaluation of staining susceptibility of resin artificial teeth and stain removal efficacy of denture cleansers(2014-11-01T00:00:00Z) Kurtulmus-Yilmaz, Sevcan; Deniz, ŞULE TUĞBA; DENİZ, ŞULE TUĞBAObjective. To assess the staining susceptibility of four acrylic resin (Ivostar, SR Vivodent PE, Major Dent, Integral) and a nanocomposite resin (Veracia) artificial teeth and to evaluate the stain removal efficacy of denture cleansers. Materials and methods. Sixty maxillary incisors of each brand (total = 300) were divided into three groups according to staining solution as coffee, red wine and tea. Baseline color measurements were performed with a spectrophotometer. Specimens were immersed in staining solutions for 14 h (2 h x 7 days) and then second color measurements were performed. Each group was further divided into four sub-groups according to denture cleanser as Corega tabs, Fittydent, NaOCl (0.5%) and distilled water (control) (n = 5). Specimens were immersed in denture cleansers for 8 h and third color measurements were made. Thus, the weekly simulation period was completed. This cycle was repeated 12 times to simulate a 3-month time period and measurements were performed at the end of the 4th, 8th and 12th cycles. Delta E values were calculated and data were analyzed with 3-way repeated measures ANOVA and Bonferroni tests. Results. Significant color differences were found among the teeth and staining solutions, but all of the color differences were in the clinically acceptable range (Delta E < 5.5). Integral showed the highest Delta E values for all solutions, while Ivostar and Vivodent demonstrated the lowest Delta E values for red wine and tea solutions. There was no significant difference among the denture cleansers in terms of stain removal efficacy. Conclusions. Cross-linked acrylic (Integral) and nanocomposite (Veracia) resin teeth were more susceptible to staining. Denture cleansers were efficient on stain removal from artificial teeth.