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Öğe Antifungal Efficacy of Aqueous and Gaseous Ozone in Root Canals Infected by Candida albicans(AHVAZ JUNDISHAPUR UNIV MED SCI, 2013) Hubbezoglu, Ihsan; Zan, Recai; Tunc, Tutku; Sumer, Zeynep; Hurmuzlu, FeridunBackground: Candida albicans is one of the important microorganism which can be isolated from normal flora in the mouth. The resistance of C. albicans against disinfectants like ozone can reduce success rate of root canal treatments. Objectives: The current study aimed to investigate the antifungal efficacy of aqueous and gaseous ozone in human root canals infected by C. albicans. Materials and Methods: Fifty single-root mandibular premolar teeth were selected. The teeth were prepared and sterilized. C. albicans were incubated in root canals and kept at 37 degrees C for 24 h. The teeth were divided into one positive, one negative control, and three experimental groups (n = 10). Group 1, saline (positive control); Group 2, sodium hypochlorite (NaOCl) (negative control); Group 3, aqueous ozone with manual technique (4 mg/L); Group 4, aqueous ozone with ultrasonic technique (4 mg/L) and Group 5, gaseous ozone. Disinfection procedures were performed during 300 s to ensure standardization among all the working groups. Paper points, placed in the root canals before and after disinfection procedures, were transferred in Eppendorf tubes containing 0.5 ml of brain heart infusion broth. Then 50-mu L suspension was inoculated onto Sabouraud dextrose agar. Microbial colonies were counted and data were evaluated statistically with using one-way ANOVA and Tukey's tests. Results: A statistically significant difference was found between antifungal activities of gaseous ozone group and NaOCl group (P < 0.05). Additionally, although no statistically significant differences were found among aqueous ozone groups (manual and ultrasonic techniques) and the NaOCl group (P > 0.05), few fungi were found in the aqueous ozone with manual technique group. Conclusions: When gaseous ozone was used alone in root canals, its antifungal effect was not sufficient. However, applying aqueous ozone with ultrasonic technique showed stronger antifungal effects than aqueous ozone with manual technique in root canals.Öğe Effect of acid etching and different Er:YAG laser procedures on microleakage of three different fissure sealants in primary teeth after aging(JAPANESE SOC DENTAL MATERIALS DEVICES, 2013) Unal, Murat; Hubbezoglu, Ihsan; Zan, Recai; Kapdan, Arife; Hurmuzlu, FeridunThe purpose of this study was to evaluate the effects of different surface conditioning procedures on microleakage and unfilled area proportions of three fissure sealants(Aegis, Helioseal and Helioseal F) in primary molar teeth. One hundred and fifty teeth were randomly divided into five main groups according to surface conditioning procedures. Main groups were; acid-etching(Group A); laser 3.75 W(Group B) and 5 W(Group D); acid-etching combined with laser 3.75 W(Group C) and 5 W(Group E). Samples were aged by thermocycling and water bath. Afterwards, they were immersed in basic fuchsin solution for 24 h and bucco-lingual sections were obtained from each tooth. Digital images were taken using a stereo-microscope and the microleakage and unfilled area proportions were assessed by using a software system. Consequently, Aegis FS containing amorphous calcium phosphate was found to exhibit the lowest microleakage in all surface conditioning procedures. Unfilled areas were not detected in Groups C and E of all FSs.Öğe Effect of external tooth bleaching on dental plaque accumulation and tooth discoloration(MEDICINA ORAL S L, 2008) Gursoy, Ulvi Kahraman; Eren, Digdem Isin; Bektas, Ozden Ozel; Hurmuzlu, Feridun; Bostanci, Vildan; Ozdemir, HakanObjectives: Treatment of dental discolorations with external bleaching is becoming very common in dentistry, however, possible irreversible alterations on enamel surface due to bleaching procedures is a topic of discussion. The aim of this study was to evaluate the clinical effects of bleaching by measuring the dental plaque accumulation on human enamel and tooth discoloration in vivo. Study Design: Forty-four teeth in eleven patients not revealing any restorations or periodontal problems were enrolled in this study. Bleaching agent applied only to labial surfaces of incisors using commercial 35 % hydrogen peroxide gel. Dental plaque and tooth color measured in the same group of participants, at the end of non-brushing periods lasting 3 and 5 days, respectively, before and after bleaching. Results: The results of the comparison of pre- and post-bleaching measurements showed that, after a non-brushing period lasting 3 day, discoloration scores and plaque accumulation scores for bleached surfaces were lower than the non-bleached surface scores. However, at the end of a non-brushing period lasting 5 day, even the color measurement score in post-bleaching period was lower than the pre- bleaching counterpart, plaque index measurements showed higher plaque accumulation scores in the bleached group. Conclusions: According to these results, bleaching with 35 % hydrogen peroxide seem to favor plaque accumulation after non-brushing period lasting 5 day and tooth discoloration after bleaching is not in correlation with the amount of plaque accumulation.Öğe Fracture Resistance of Root-Filled Maxillary Premolar Teeth Restored with Current Dentin Bonding Adhesives(Univ Zagreb, Sch Dental Medicine, 2008) Siso, Seyda Herguner; Er, Kursat; Hurmuzlu, Feridun; Kustarci, Alper; Akpinar, Kerem EnginObjective: The aim was to study and compare the fracture resistance of root-filled premolar teeth restored with various dentin bonding adhesives (DBAs). Material and Methods: Eighty extracted single-rooted human maxillary premolar teeth were randomly assigned to eight groups (n=10). Group 1 (control) did not receive any preparation. From groups 2 to 8, the teeth were root filled and MOD cavities were prepared. Group 2 remained unrestored. Groups 3-8 were restored using the following DBAs: iBond (Heraeus Kulzer), G-Bond (GC Co.), Xeno III (Dentsply/Caulk), AdheSe (Ivoclar Vivadent), Clearfil Protect Bond (Kuraray) and Clearfil Tri-S Bond (Kuraray); all preparations were further restored with a resin composite (Renew, Bisco). All specimens were then stored in 100% humidity at 37 degrees C for 24 h, followed by thermal cycling 500 times between 5 degrees and 55 degrees C. Compressive loading of the teeth was performed by a universal testing machine at a crosshead speed of 1 mm min-1 until failure. The data were recorded in Newton (N) and were submitted to one-way ANOVA and Tukey post-hoc test. Results: The mean loads necessary to fracture the samples in each group were: group 1: 984.00 +/- 116.27a, group 2: 167.30 +/- 47.26b, group 3: 872.30 +/- 164.99a, group 4: 848.70 +/- 157.84a, group 5: 916.30 +/- 246.19a, group 6: 863.20 +/- 197.69a, group 7: 802.20 +/- 183.84a, group 8: 870.70 +/- 126.48a. Similar letters indicate statistically similar values (P>0.05). Conclusion: The type of DBAs had no influence on the fracture resistance of teeth.Öğe INfluence Of Different Cavity Disinfection Solutions And Laser Systems On Repair Bond Strength Of Silorane Based CompositE(Cumhuriyet University Faculty of Dentistry, 2021) Kaptan, Alper; Hurmuzlu, FeridunPurpose: To evalute the effects of Nd:YAG-laser, Er:YAG-laser, chlorhexidine and ozonated water application used for antibacterial effects on repair bond strength of silorane based composite. Materials and Methods: 100 cavities (2 mm deep, 3 mm diameter) prepared in acrylic blocks were filled with silorane composite and subjected thermal cycle and divided into 5 groups (N=20). Group 1: Chlorhexidine; Group 2: Ozonated-water; Group 3: Nd:YAG-laser; Group 4: Er:YAG-laser; Group 5 (control): untreated. And disinfection method treated according to the groups. Composite repair procedure was implemented with the same silorane based composite. Groups divided into 2 subgroups (n=10). One of the subgroups for each group was subjected second thermal cycle. All of the samples tested by a universal test device. Data were statistically analyzed and significance test of the difference between the two means, the variance analysis, and Student-t Test used. Results: No statistical difference was observed among groups after first thermal cycle (p>0.05). After the composite repair, there were no statistically significant difference between groups that were subjected to second thermal cycle (p>0.05). When each group was evaluated in themselves on comparing before and after the thermal cycle after the repair operation; as no statistically significant difference between Ozonated-water, Nd:YAG, Er:YAG and Control groups (p>0.05), a statistically significant decrease was observed only in the Chlorhexidine group after thermal cycle (p<0.05). Conclusions: Ozonated-water, Nd:YAG-laser and Er:YAG-laser applications can be used in the repair of silorane-based composite restorations as an alternative antibacterial application, since the application of chlorhexidine reduces the repair bonding strength. © 2021,Cumhuriyet Dental Journal.All Rights ReservedÖğe Physical Properties of Three Different Types of LC Composite Resins(Univ Zagreb, Sch Dental Medicine, 2008) Siso, Seyda Herguner; Hurmuzlu, FeridunObjectives: The aim of this study was to determine physical properties of three different types of composite resins: Point 4 (microhybrid), Solitaire 2 (packable) and Definite (ormocer). Materials and Methods: In the physical section of this study, 10 samples for each of the following tests were prepared from each of the three restorative materials according to standard protocols: compressive strength test (ADA 27), diametral tensile strength test (ADA 27), flexural strength test (ISO 4049) and depth of cure test (ISO 4049). The data were analyzed using Kruskal Wallis and Mann Whitney-U tests. Results: The compressive, diametral tensile strength, flexural strength, depth of cure test values respectively of the materials were: Point 4 (202.49, 47.12, 93.09, 4.74); Solitaire 2 (248.92, 59.74, 92.97, 4.12); and Definite (174.73, 50.82, 103.15, 5.25). While significant statistical differences were observed in the values of the compressive strength, diametral tensile strength and depth of cure tests (p<0.05), no significant variance was found in the results of the flexural strength test (p>0.05). Conclusion: According to the results of the compressive strength and diametral tensile strength tests, Solitaire 2 received the highest value, whereas Definite scored highest on the depth of cure test.Öğe Temperature Rises During Application of Er:YAG Laser Under Different Primary Dentin Thicknesses(MARY ANN LIEBERT INC, 2013) Hubbezoglu, Ihsan; Unal, Murat; Zan, Recai; Hurmuzlu, FeridunObjective: The present study investigated the effects of the Er:YAG laser's different pulse repetition rates on temperature rise under various primary dentin thicknesses. Background data: The Er:YAG laser can be used for restorative approaches in clinics and is used to treat dental caries. There are some reports that explain the temperature rise effect of the Er:YAG laser. Recently, the Er:YAG laser has been found to play an important role in temperature rises during the application on dentin. Methods: Caries-free primary mandibular molars were prepared to obtain dentin discs with 0.5, 1, 1.5, and 2 mm thicknesses (n = 10). These discs were placed between the Teflon mold cylinders of a temperature test apparatus. We preferred three pulse repetition rates of 10, 15, and 20 Hz with an energy density of 12.7 J/cm(2) and a 230 mu s pulse duration. All dentin discs were irradiated for 30 sec by the Er:YAG laser. Temperature rises were recorded using an L-type thermocouple and universal data loggers/scanners (E-680, Elimko Co., Turkey). Data were analyzed by two-way ANOVA and Tukey tests. Results: Whereas the lowest temperature rise (0.44 +/- 0.09 degrees C) was measured from a 10 Hz pulse repetition rate at a dentin thickness of 2 mm, the highest temperature rise (3.86 +/- 0.43 degrees C) was measured from a 20 Hz pulse repetition rate at a 0.5 mm dentin thickness. Conclusions: Temperature rise did not reach critical value for pulpal injury in any primary dentin thicknesses irradiated by a high repetition rate of the Er:YAG laser.
