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Öğe A comparison of microleakage scores of five different types of composite resins(Diagnosis Press Limited., 2010) Dallı, Mehmet; Bahşi, Emrullah; Şahbaz, Cafer; İnce, Bayram; Akkuş, Zeki; Ercan, Ertuǧrul; Atılgan, Serhat S.This study aimed to perform a comparative assessment of microleakage in Class V cavities among five different composite resins. For this purpose 100 fresh caries-free human permanent molars were randomly assigned to one of five groups (n=20). Clearfil Majesty Esthetic + Clearfil S3 Bond (Group I), TPH Spectrum + Xeno V (Group II), Gradia Direct Anterior + G Bond (GC) (Group III), Premise + Optibond All in One (Group IV) and Charisma + iBond (Group V) were applied and polymerized under LED. Specimens were varnished, immersed in 0.5% methylene and sectioned bucco-palatinally/lingually, and microleakage scores were determined. Gingival and occlusal microleakage scores among groups were statistically significant (p<0.05) (p=0.043, p=0.005). Occlusal microleakage scores for Clearfil Majesty Esthetic and Premise were lower than in the other groups. Charisma had the highest microleakage scores, with no difference among the other groups (p>0.05). In conclusion occlusal and gingival microleakage scores were satisfactory except for Charisma.Öğe The effects of antibacterial solutions on microorganisms isolated from infected root canals in vivo(2006) Ercan, Ertuǧrul; Dülgergil, Türksel Çoruh; Yavuz, I.; 0000-0002-4753-6553; 0000-0001-6953-747XObjective: This study assessed the in vivo antimicrobial activity of NaOCl, Chx, Ca(OH)2, and H2O2 against five different microorganisms: Enterococcus faecalis, Porphyromonas endodontalis, Streptococcus salivarius, Lactobacillus sp., and S. aureus. Study design: Eighty infected teeth in seventy patients with pulpal or periapical pathology were studied. After preparing a standard access cavity. Sterilized paper points were used to take samples from the root canals. These were incubated in test tubes at 37°C for 72 hours. Of the resulting bacteria, the five most frequent strains were examined. The teeth were divided into four equal groups. After preparing the root canal using the step-back technique until a number 55 file, each group was subjected to one of the following irrigation solutions: 2% chlorhexidine gluconate (Chx), 5% NaOCl, Ca(OH)2 in distilled-water, or 3% H2O2. After irrigation, a temporary filling was placed in each cavity. The same irrigation procedure was repeated three and six days later. Then, the microbiologic sampling was also repeated. The chi-squared test was used for statistical comparisons. Results: Of the irrigants tested in this in vivo study, chlorhexidine was the most effective against all the microorganisms isolated from infected root canals, followed by NaOCl, Ca(OH)2, and H2O2. However, differences among the three groups were not statistically significant, except against Enterococcus faecalis (p>0.05). Conclusions: Our results did highly confirm the fact from previous studies that chx with 2% percent is the most effective antibacterial agent after three consecutive irrigations. Furthermore, in vitro and in vivo studies are necessary to assess whether the Chx imparted substantive dissolve organic material.Öğe In vitro assessment of the effectiveness of chlorhexidine gel and calcium hydroxide paste with chlorhexidine against Enterococcus faecalis and Candida albicans(2006) Ercan, Ertuǧrul; Dallı, Mehmet; Dülgergil, Çoruh Türksel; 0000-0002-4753-6553Objective: The purpose of this study was to compare the effectiveness of various medicaments, including Ca(OH)2/ 2% chlorhexidine, 2% chlorhexidine gel, and Ca(OH)2 alone, against Enterococcus faecalis and Candid albicans in vitro. Study design: Eighty extracted single-rooted human maxillary teeth were used. After removing the crown, each root was instrumented up to size 50 by using a conventional technique. The root canal was irrigated with ethylenediamine tetra-acetic acid (EDTA) solution to remove smear layer. Then, roots were infected with E faecalis and C albicans. Subsequently, the roots were divided into 4 treatment groups: group 1 was treated with calcium powder hydroxide in distilled water, group 2 was treated with calcium hydroxide powder in 2% chlorhexidine, group 3 was treated with 2% chlorhexidine gel, and group 4 was treated with 0.9% sterile saline serving as negative control. Microbial samples were taken after 7, 15, and 30 days. After incubation, dentine chips were obtained form each root canal and examined microbiologically. The microbiological samples were plated to count colony-forming units in per milligram of dentin. Results: The results showed that the 2% chlorhexidine gel was significantly more effective than calcium hydroxide with 2% chlorhexidine, calcium hydroxide, and control saline solution (P < .05). Conlusion: Under the conditions of this study, 2% chlorhexidine gel is effective in the elimination of E faecalis and C albicans from the root canal system. However, to support this in vitro observation, further in vivo studies are needed.Öğe Investigation of microorganisms in infected dental root canals(2006) Ercan, Ertuǧrul; Dallı, Mehmet; Yavuz, I.; Özekinci, Tuncer; 0000-0002-4753-6553; 0000-0001-6953-747XObjective: The purpose of this study is to investigate the type of microorganisms isolated from necrotic pulp tissues and from failed endodontic treatments in infected root canals. Methods: This study is based on an experiment conducted on 90 patients between November, 2002 and November, 2003 using a sampling. One hundred single root canals were microbiologically sampled from these patients by using sterile paper points. Among 100 canals sampled, 61 had primary infection and 39 had a history of secondary infection. Microorganisms were isolated and identified by using established advanced microbiologic techniques for anaerobic species. Results: A total of 197 cultivable isolates were recovered, the microbial findings in both types of canals, such as the number of species isolated, the 68.0% of Gram-positives and 27.9% gram-negatives, the 52.8% of facultative and 43.1 % strict anaerobic microorganisms 4.1% fungi and so on. Ten canals presented no microbial growth. Conclusions: The prevalence of bacteria and fungi found in 100 root canals is the prevalence of the microbial genera in primary and secondary endodontic infection. Peptostreptococcus spp was the most predominantly isolated microbial genera, followed by Streptococcus spp (14.2%), Porphyromonas spp (12.2%), E. faecalis (9.6%), Staphylococcus salivarius (8.6%), Prevotella spp (8.1%), Lactobacillus spp (7.1%), Actinomyces spp (7.1%), Candida albicans (4.1%), Fusobacterium spp (3.6%) Veillonella spp (2.5%), Eubacterium spp (2.5%), Bacillus spp (2.0%), and Escherichial coli (1.6%) were other types of bacteria recovered.
