Yazar "Eldeniz, Ayce Ünverdi" seçeneğine göre listele
Listeleniyor 1 - 4 / 4
Sayfa Başına Sonuç
Sıralama seçenekleri
Öğe Assessment of antibacterial activity of EndoREZ(Mosby-Elsevier, 2006) Eldeniz, Ayce Ünverdi; Erdemir, Ali; Hadimli, Hasan Hüseyin; Belli, Sema; Erganis, OsmanObjective. The aim of this in vitro study was to evaluate antibacterial activity of a new resin based sealer, EndoREZ in comparison with 5 other sealers: AH 26, Diaket, Sultan, Apexit, and RoekoSeal. Study design. The effect of 6 different sealers oil the growth of 3 bacteria (Enterococcus faecalis, Staphylococcus aureus, and Pseudomonas aeruginosa) was measured using the agar diffusion test (ADT) and direct contact test (DCT). For ADT, 200 mu L bacterial suspensions were spread oil agar plates and freshly mixed sealers were applied to uniform wells punched in the agar. The zones of inhibition of bacterial growth were measured at 24 hours, 48 hours, 7 days, and 10 days. For DCT, 2 sets of sealers were prepared: fresh and 24-hour samples. Fresh samples were used within 20 minutes of mixing time while 24-hour samples were allowed to set it) a humid atmosphere at 37 degrees C for 24 hours before testing. Sealers were mixed and placed oil the walls of microliter plate wells and 10-mu L bacterial Suspensions were allowed to directly contact the sealers for I hour. Fresh media were added and 15 mu L were transferred from this plate to another plate containing fresh medium (215 mu L). Bacterial growth of this last plate was then measured using spectrophotometer every hour over 16 hours. Results. ADT results indicated that EndoREZ, Apexit, and RoekoSeal did not show any, antibacterial activity. In DCT results, AH 26 and Sultan were potent bacterial growth inhibitors. Conclusion. EndoREZ is not as potent a bacterial growth inhibitor as Sultan and AH 26.Öğe Effects of Different Curing Units and Luting Agents on Push-out Bond Strength of Translucent Posts(Elsevier Science Inc, 2010) Zorba, Yahya Orçun; Erdemir, Ali; Türkyılmaz, Ali; Eldeniz, Ayce ÜnverdiIntroduction: The aim of this study was to evaluate the effects of different curing units and 2 luting cements on the push-out bond strength of a translucent fiber post. Methods: Thirty maxillary incisor roots were endodontically treated. Post spaces were prepared, and the smear layers were removed. Posts (FRC Postec Plus) were luted with either a self-etch cement (Panavia F 2.0) or a self-adhesive cement (Maxcem). Luting agents were then light-activated with a quartz-tungsten-halogen, a blue light emitting diode, or a plasma-arc curing unit. Roots/cemented posts were transversally sectioned from coronal to apical. Push-out tests were performed, and data were analyzed by using three-way analysis of variance and Tukey tests. Results: Push-out bond strengths were significantly affected by the type of luting agent (P < .05) and root region (P < .05). The type of light source used in curing did not affect push-out bond strengths (P > .05). Conclusions: Self-adhesive resin cement provided higher bond strength than the self-etch cement when smear layer was removed before the post cementation. The push-out bond strength in the apical portion of the root was significantly lower than in the coronal region. The use of different curing units in the photoirradiation of dual-cured resin cement did not affect the retention of the fiber post as a result of the limited light transmission capability of this post. (J Endod 2010;36:1521-1525)Öğe The effects of three different desensitizing agents on the shear bond strength of composite resin bonding agents(Elsevier Science Bv, 2010) Zorba, Yahya Orçun; Erdemir, Ali; Ercan, Ertuğrul; Eldeniz, Ayce Ünverdi; Kalaycıoğlu, Barış; Ülker, MustafaThe aim of this study was to evaluate the effects of three desensitizing agents on the shear bond strengths of four different bonding agents used to bond composite resin to dentin. A total of 160 extracted human molars were sectioned parallel to the occlusal plane under water cooling, polished and randomly divided into 4 groups of 40. Each group was treated with a different desensitizing agent (Tooth Mousse, Ultra-EZ, Cervitec Plus), except for an untreated control group. Each group was then randomly subdivided into 4 groups of 10, and a different dentin bonding agent (XP Bond, AdheSE, Adper Prompt L-pop, GBond) was applied to each group in order to bond the specimens to a resin composite (Gradia Direct) built up using a plastic apparatus. A Universal Testing Machine was used to measure the shear bond strength of each specimen. Statistical analysis was performed using one-way ANOVA and Tukey's tests. With the exception of the Control/AdheSE and Ultra-EZ/XP Bond groups, no statistically significant differences were found in the shear bond strength values of the groups tested. These findings suggest that the use of different desensitizing agents does not affect the shear bond strength of various adhesive systems used to bond resin composite to dentin. Crown Copyright (C) 2010 Published by Elsevier Ltd. All rights reserved.Öğe Evaluation of pH and calcium ion release of Acroseal sealer in comparison with Apexit and Sealapex sealers(Mosby-Elsevier, 2007) Eldeniz, Ayce Ünverdi; Erdemir, Ali; Kurtoğlu, Firuze; Esener, TimurObjective. This is an in vitro assessment of pH level and calcium ion release exhibited by 3 calcium hydroxide-based root canal sealers-Sealapex, Apexit, and Acroseal. Study design. The materials were prepared according to the manufacturers' instructions and placed in 1 cm long and 4 mm diameter tubes. The tubes were then immersed in a glass flask containing 10 mL bidistilled water (n = 15), which was sealed and stored at 37 degrees C before the materials had set. The control group contained bidistilled water with empty tubes (n = 12). At predetermined time intervals (24 h, 96 h, and 7, 15, and 28 days) the pH of the bidistilled water was tested with a pH meter and for released calcium by using spectrophotometry. The data were statistically analyzed using 1-way analysis of variance for the comparison of the materials at each time point. If the difference was significant, individual comparisons were performed by Tukey multiple comparisons test (alpha = .05). Results. Sealapex produced higher pH and released significantly higher calcium amounts than the other 2 sealers at all periods (P < .05). Apexit showed higher calcium release than Acroseal at the end of 15 days (P < .05). There was no significant difference in the pH between Apexit and Acroseal (P > .05). Conclusion. The new Acroseal sealer presented the least calcium ion release and pH than Sealapex and less calcium ion release than Apexit sealer.
