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    Comparative analysis of three different filling techniques and the effects of experimental internal resorptive cavities on apical microleakage
    (2014) Keles A.; Ahmetoglu F.; Ocak M.S.; Dayi B.; Bozkurt A.; Orucoglu H.
    Objectives: The aim of this study was to evaluate the sealing abilities of three different gutta-percha techniques in experimentally defective roots (EDR) and non-defective roots (NR). Materials and Methods: Sixty canine teeth were divided into six groups of ten; Group 1, NR + cold lateral condensation (CLC); Group 2, EDR + LC; Group 3, NR + BeeFill; Group 4, EDR + BeeFill; Group 5, NR + Thermafil; and Group 6, EDR + Thermafil. Apical leakage was measured using a computerized fluid filtration meter with a laser system. Results: Statistical analysis revealed that the CLC demonstrated more microleakage in the EDR than in the NR (P < 0.01). Thermafil demonstrated more microleakage in the NR than in the EDR (P < 0.01). No statistically significant differences were found between the BeeFill groups (P > 0.05). Conclusions: The results of this study indicate that internal resorptive cavities can affect the apical sealing properties of different root canal filling techniques, with Thermafil ensuring the lowest apical microleakage. © 2014 Dental Investigations Society.
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    Comparison of the sealing ability of biodentine, iroot bp plus and mineral trioxide aggregate
    (Cumhuriyet University Faculty of Dentistry, 2016) Aydemir S.; Cimilli H.; Gemi P.M.; Bozkurt A.; Orucoglu H.; Chandler N.; Kartal N.
    Objective: The aim of this study was to compare the sealing ability of two new root repair materials, Biodentine and iRoot BP Plus against ProRoot MTA when used as root-end fillings. Methods: The root canals of 45 extracted maxillary anterior teeth were prepared with Pro Taper instruments. After apical resection and ultrasonic root-end cavity preparation, the teeth were divided into three groups. The cavities in the first group of 15 were filled with Biodentine, the second with iRoot BP Plus and the third with ProRoot MTA. A computerized fluid filtration method assessed the seal at 2, 10 and 28 days. Results: Significant differences were found between Groups 1-2, Groups 1-3 and between Groups 2-3 at all-time intervals (P < 0.05). Leakage was not significantly different at 10 and 28 days for Biodentine and iRoot BP Plus (P > 0.05). Conclusion: The two new root repair materials showed good performance and both offered improved handling properties compared to MTA. © 2016, Cumhuriyet Dent J. All rights reserved.
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    Effect of bioaggregate thickness on the apical sealing of root-end filling
    (2013) Bayram M.; Bayram E.; Bozkurt A.
    Objectives: The purpose of this study was to compare the ability of different cavity thickness of Bioaggragate to prevent microleakage using computerized fluid filtration method. Materials and Methods: Fifty single- rooted human teeth were selected for this study. The root canals were prepared with Ni-Ti rotary files with 5% Sodium hypocloride (NaOCl) solution as the irrigant. Then sealed with gutta-percha points(DiaDent®GuttaPercha Points, Seul, SouthCorea) and AH Plus (Dentsply Maillefer, Ballaigues, İsviçre). After root end resection, fifty theeth were randomly selected into 1 of 4 test groups containing 10 teeth each, and positive and negative control groups containing 5 teeth each. Group 1: 1mm, Group 2: 2mm, Group 3: 3mm, Group 4: 6mm cavity thickness. And then all prepared root-end cavities filled with Bioaggregate. Leakage was evaluated using with a computarized fluid filtration model. Results: Statistical analysis showed that group 1 leaked more than all other groups (p<0.001). There was a significant difference between group 1 and group 3(p<0.001),and also there was a significant difference between group 2 and group 3. In contrast there was no significant difference between group 3 and group 4 (p>0.001). Conclusions: According to this study, the thickness of root end cavity must be minimum 3mm and more when Bioaggregate root end filling material is used.
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    Fluid flow evaluation of coronal microleakage intraorifice barrier materials in endodontically treated teeth
    (2013) Bayram H.M.; Çelikten B.; Bayram E.; Bozkurt A.
    Objective: The objective of this study was to compare the coronal microleakage intraorifice barrier materials, called CoroSeal (CS), fissur sealant (FS), flowable composite FC, and policarboksilate cement (PC), by using the computerized fluid filtration method. Materials and Methods: Fifty freshly extracted, single-canal human maxillary central teeth were used in this study. The teeth were decoronated to a standardized root length of 15 mm. After preparation and irrigation, all the teeth were obturated with gutta-percha and AH-Plus. In all teeth, the coronal 2 mm of root filling was removed and replaced with one of the intraorifice barriers. According to intraorifice barriers, teeth were divided randomly into 4 experimental groups (n = 10) and 2 control groups (n = 5). Group 1: CS; Group 2: FS; Group 3: FC; and Group 4: PC. Positive Control Group: No barrier material was used. Negative Control Group: Roots were completely coated with the nail polish, including the orifice. Leakage was evaluated by using a computerized fluid filtration model. Differences in fluid filtration among groups were subjected to statistical analysis using the Kruskal-Wallis Test and multiple comparisons test. Results: A value of P < 0.05 was statistically significant. Statistical analysis has indicated that the CS leaked significantly less than other groups (P < 0.05). There was a significant difference between FS and PC (P < 0.05), in contrast there was no significant difference between FS and FC (P > 0.05). Conclusions: Using the CS material as an intraorrifice barrier material reduced amount of microleakage as compared with FS, FC, and PC. © 2013 Dental Investigations Society.