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    Clinical evaluation of apex locator and radiography in primary teeth
    (WILEY-BLACKWELL, 2015) Oznurhan, Fatih; Unal, Murat; Kapdan, Arife; Ozturk, Ceren; Aksoy, Serkan
    AimThe aim of this in vivo study was to evaluate the accuracy and reliability of electronic apex locater and radiographic determination of root canal length in primary teeth. MethodologyA total of 32 human primary molar teeth (96 roots) were selected. After endodontic access preparation, root canals were irrigated with physiological saline solution. The access cavities were dried with cotton pellets and, the roots were dried with paper points before performing the electronic measurement. The root canal length measurements were first taken with an apex locater (EndoMaster), and then, a size 15K-file was inserted into the root canal, and radiography was taken to determine the working length measurements. The measurement data were recorded and compared by one-way anova and Kruskal-Wallis tests. P<0.05 was accepted for the significance. ResultsThe mean values for radiography were 13.231.92mm and for EndoMaster were 13.08 +/- 1.77mm. The accuracy of EndoMaster was 80.2% in correct measurements +/- 1mm (P<0.001). ConclusionThe electronic apex locators could be useful in determining working length and thereby decreasing the need for radiographs and exposure to ionizing radiation in pediatric dental patients.
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    Evaluation of Polypropylene Fiber Reinforced Glass Ionomer Cement: A Comparative In-Vitro Study
    (Sage Publications India Pvt Ltd, 2020) Oznurhan, Fatih; Ozturk, Ceren
    Aim: To compare the surface roughness, microtensile bond strength (mu TBS), and flexural strength of polypropylene (PP) fibers reinforced glass ionomer cements (GICs). Materials and Methods: A comparative in vitro study was designed to test the PP fiber reinforced GIC, which was formed when 0.5-1 mm length PP fibers were added into the powder of conventional GIC. Four groups were prepared (Group 1: control, Group 2: 1 wt% PP fiber, Group 3: 3 wt% PP fiber, and Group 4: 5 wt% PP fiber) to evaluate flexural strength, surface roughness values, and mu TBS. A total of 10 samples with 25 x 2.5 x 5 mm dimensions were prepared for each group to test flexural strength. Disk-shaped specimens (n = 10) of 2 mm thickness and 10 mm diameter were used to test surface roughness. A total of 24 human primary molar teeth were used to evaluate mu TBS, and 12 sticks were obtained for each group. The fractured surface analyses of samples from mu TBS was performed using scanning electron microscope. The data obtained from the experiments were recorded and analyzed with one-way analyses of variance technique, and the normality was tested using the Shapiro-Wilk technique. A significance level of .05 was used. Results: In flexural strength tests, Group 3 (3 wt% PP fiber) showed significantly increased values (p < .05) when compared with other groups. Group 4 (5 wt% PP) showed significantly highest values in surface roughness tests (p < .05). No significant differences were seen between the groups (p > .05) according to mu TBS results. More PP fibers were seen in fractured surfaces, when PP ratio increases. Conclusion: It was observed that increased PP fiber percentage showed increased surface roughness, and 3 wt% PP fiber gave optimal values for fracture toughness. Incorporation of PP fiber to GIC does not affect the bonding to primary tooth dentine.