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Öğe Bactericidal efficacy of Er,Cr : YSGG laser irradiation against Enterococcus faecalis compared with NaOCl irrigation: an ex vivo pilot study(WILEY, 2007) Eldeniz, A. U.; Ozer, F.; Hadimli, H. H.; Erganis, O.Aim To compare the efficacy of a standard NaOCl irrigation procedure with that of Er,Cr:YSGG laser irradiation in contaminated root canals having small and large apical foramina. Methodology Forty root canals of extracted central incisor teeth with straight roots were chosen so that their apical foramina just permitted the tip of a size 20-K file to pass through. The canals were then enlarged with files to size 60 and randomly divided into four groups of 10 teeth each. The apical foramina of one group were widened further so that the tip of a size 45-K file could just pass through. After sterilization, all roots were inoculated with Enterococcus faecalis for 48 h at 37 degrees C. The first group was used as a control, the second group was irrigated with 3% NaOCl solution for 15 min, and the last two groups having different sizes of apical foramina were irradiated with the Er,Cr:YSGG laser at output power from 0.5 W, with 20% air and water levels. The disinfecting efficacy of the groups was tested by collecting dentine chips from the inner canal walls of the specimens and counting viable E. faecalis on Mueller-Hinton agar plates. Results The differences in the mean number of viable colonies between the control and laser groups were statistically significant (P < 0.05). The control specimens had the highest number of microorganisms (153 x 10(3) +/- 39 x 10(3)). Complete sterilization was achieved in the 3% NaOCl group. The mean colony forming units (CFU) values obtained after Er,Cr:YSGG laser irradiation were 6.6 x 10(3) CFU and 6.5 x 10(3) CFU in root canals having large and small apical foramina respectively. Conclusion In teeth with straight roots the Er,Cr:YSGG laser reduced the viable microbial population in root canals with small and large apical foramina but did not eradicate all bacteria. Three percent NaOCl inhibited the growth of E. faecalis and effectively sterilized all root canals.Öğe Effect of Er,Cr:YSGG Laser on the Microtensile Bond Strength of Two Different Adhesives to the Sound and Caries-affected Dentin(OPERATIVE DENTISTRY INC, 2009) Ergucu, Z.; Celik, E. U.; Unlu, N.; Turkun, M.; Ozer, F.Objective: This study examined the effect of Er,Cr:YSGG laser irradiation on the microtensile bond strength (pTBS) of a three-step etch-and-rinse and a two-step self-etch adhesive to sound and caries-affected dentin. Methods: Sixteen freshly extracted human molars with occlusal dentin caries were used. The caries lesion was removed by one of the following methods: conventional treatment with burs or Er,Cr:YSGG laser (Waterlase MD, Biolase). The adhesive systems (AdheSE, Ivoclar Vivadent and Scotchbond Multi Purpose, 3M ESPE) were applied to the entire tooth surface according to the manufacturers' instructions. Resin composites were applied to the adhesive-treated dentin surfaces and light-cured. Each tooth was sectioned into multiple beams with the "non-trimming" version of the microtensile test. The specimens were subjected to microtensile forces (BISCO Microtensile Tester, BISCO). The data was analyzed by three-way ANOVA and independent t-tests (p=0.05). Results: Er,Cr:YSGG laser irradiation exhibited similar pTBS values compared to that of conventional bur treatment, regardless of the adhesive system and type of treated dentin. The self-etch system revealed lower mu TBS values, both with conventional and laser treatment techniques, compared to the etch-and-rinse adhesive in sound and caries-affected dentin (p<0.05). Conclusion: Er,Cr:YSGG laser irradiation did not negatively affect the bonding performance of adhesive systems to sound and caries-affected dentin.Öğe The examination of enamel-dentin morphology by using the acetate peel technique.(INT AMER ASSOC DENTAL RESEARCHI A D R/A A D R, 2003) Tasdemir, S. T.; Solmaz, K.; Derinbay, O.; Sengun, A.; Ozer, F.[Abstract not Available]Öğe Influence of Operator Experience on In Vitro Bond Strength of Dentin Adhesives(Quintessence Publishing Co Inc, 2012) Unlu, N.; Gunal, S.; Ulker, M.; Ozer, F.; Blatz, M. B.Purpose: To examine the influence of operator experience level on shear bond strength (SBS) of a self-etching adhesive (Clearfil SE Bond [CSE], Kuraray) and an etch-and-rinse adhesive (Single Bond [SB], 3M ESPE). Materials and Methods: Flat dentin surfaces were created on 120 extracted human third molars. Bonding agents and composite resin were applied and light cured according to manufacturers' directions (n = 15). Four operators with different levels of experience in operative dentistry performed the same specimen preparation steps independently: group 1: specialist in operative dentistry; group 2: post-graduate student; group 3: undergraduate dental student; group 4: private general practitioner. Specimens were stored in distilled water for 24 h at 37 degrees C before SBS testing. Statistical analyses were carried out with Mann-Whitney U- and Kruskall-Wallis tests. Results: For CSE, mean SBS and standard deviations were: (1) 54.4 +/- 15.6(a), (2) 55.3 +/- 7.6(a), (3) 49.4 +/- 10.5(ab), (4) 41.6 +/- 13.1(b). For SB, they were: (1) 28.6 +/- 10.3(c), (2) 32.7 +/- 11.2(c), (3) 17.5 +/- 5.6(d), (4) 24.4 +/- 9.5(cd). Groups with the same superscript letters are not significantly different. CSE showed higher bond strengths than SB in all groups (p < 0.05). There was no significant difference in mean bond strengths between groups 1 and 2 for each adhesive (p > 0.05). Depending on the adhesives, groups 3 and 4 were significantly different from groups 1 and 2, but not different from each other. Conclusion: Operator experience influences dentin bond strength values of dentin adhesives. An increased level of experience with a specific adhesive system and the associated application procedures correlates with higher SBSs.Öğe TNF-alpha, IL-6 AND NT pro-BNP LEVELS IN PATIENTS WITH OBSTRUCTIVE SLEEP APNEA SYNDROME AND THE EFFECT OF CPAP TREATMENT OVER LEVELS OF THESE PARAMETERS(OXFORD UNIV PRESS INC, 2010) Dogan, Unuvar F.; Yosunkaya, S.; Okur, H.; Ozer, F.[Abstract not Available]Öğe Tolerability of nimesulide in patients with histories of adverse reactions to acetylsalicylicacid and non steroidal antiinflammatory drugs(WILEY-BLACKWELL, 2013) Tepetam, F. M.; Colakoglu, B.; Ozer, F.; Maden, E.; Yosunkaya, S.; Duman, D.; Oruc, O.[Abstract not Available]
