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SAZAK ÖVEÇOĞLU, HESNA

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    Comparison of intracoronal bleaching methods on teeth discolored by different antibiotic pastes
    (WOLTERS KLUWER MEDKNOW PUBLICATIONS, 2017) TARÇIN, BİLGE; Iriboz, E.; Ozturk, B. A.; Korklu, S.; Tarcin, B.; Berker, Y. G.; Ovecoglu, H. S.
    Aim: To compare the bleaching efficacy of sodium perborate with different activation methods on crowns discolored by two different antibiotic pastes. Materials and Methods: Eighty-five extracted human incisors were prepared to size #30 using ProTaper rotary instruments. After chemomechanical preparation and irrigation procedures, the specimens received triple antibiotic paste (TAP, n = 40), minocycline paste (MP, n = 40), or calcium hydroxide (n = 5, control group) and coronally sealed with temporary filling material. Spectrophotometric readings were obtained on day 0uweek 4. Data were analyzed with the MannuWhitney U-test and Wilcoxon sign test (P < 0.05). Sodium perborate was then inserted into the pulp chambers of discolored teeth (four subgroups, n = 10) and activated by heat or ultrasonically using two different frequencies and times. Spectrophotometric readings were obtained on days 3u7. Data were analyzed by the MannuWhitney U-test and KruskaluWallis test (P > 0.05). Results: Both groups showed statistically significant coronal discoloration at each time interval (P < 0.01), but their final shades did not significantly differ between the groups (P > 0.05). Although the MP subgroups exhibited more bleaching than the TAP subgroups on days 3 and 7, the difference was not significant (P > 0.05). The bleaching results for the sodium perborate activation techniques did not significantly differ among groups (P > 0.05). Conclusions: Both antibiotic pastes induced crown discoloration that was reversible using all sodium perborate bleaching techniques.
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    Efficacy of XP-Endo Finisher in the Removal of Triple Antibiotic Paste from Immature Root Canals
    (ELSEVIER SCIENCE INC, 2017) TÜRKAYDIN, DİLEK; Turkaydin, Dilek; Denzil, Erhan; Basturk, Fatima Betul; Ovecoglu, Hesna Sazak
    Introduction: The aim of this study was to evaluate and compare the effectiveness of the XP-Endo Finisher (FKG Dentaire, La Chaux-de-Fonds, Switzerland) with passive ultrasonic irrigation (PUI) and needle irrigation in the removal of triple antibiotic paste (TAP) from the straight immature root canals of extracted teeth. Methods: Thirty-four freshly extracted single-rooted teeth were used. All canals were prepared up to the ProTaper F5 file (Dentsply Maillefer, Ballaigues, Switzerland). Apices were drilled to simulate teeth with immature apices. The canals were filled with TAP, sealed, and incubated at 37 degrees C and 100% humidity for 1 month. Samples were randomly assigned to 3 experimental groups according to the method used for TAP removal: XP-Endo Finisher, PUI, and needle irrigation (n = 10). Then, the roots were split into 2 halves. The amount of TAP residue in the apical portion of each segment was evaluated using a scanning electron microscopy and scored. Results: The amount of remaining TAP was significantly lower in the XP-Endo Finisher group compared with the needle irrigation and PUI groups (P < .05). Between the needle irrigation and PUI groups, there were no statistically significant differences (P> .05). Conclusions: Within the limitations of this study, the XP-Endo Finisher removed significantly more TAP than needle irrigation and PUI.