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Öğe Antibacterial Activities of MDPB and Fluoride in Dentin Bonding Agents(Int Amer Assoc Dental Researchi a D R/a a D R, 2002) Özer, F.; Karahara, S.; Erganiş, Osman; Hadimli, Hasan Hüseyin[Abstract not Available]Öğe Association Analysis of the Gln223arg Polymorphism in the Human Leptin Receptor Gene, and Traits Related to Osas and Blood Pressure(Oxford Univ Press Inc, 2010) Küççüktürk, Serkan; Yosunkaya, Şebnem; Okur, H.; Demirel, S.; Özer, F.[Abstract not Available]Öğe Bond Strength of Five Current Adhesives to Caries-Affected Dentin(Blackwell Publishing Ltd, 2002) Şengün, Abdulkadir; Ünlü, Nimet; Özer, F.; Öztürk, B.Five current dentin adhesives were evaluated for their ability to bond to caries-affected dentin. The materials were: total etch [Solid Bond (SB)], two self-etch [Clearfil SE Bond (CSE), Etch and Prime (EP)], two one bottle [Prime and Bond 2.1 (PB), One Coat Bond (OCB)]. Sixty extracted molar teeth with proximal caries (mesial or distal) extending into mid-dentin were used. By grinding normal and caries-affected proximal surfaces, flat dentin surfaces were obtained. The surfaces were then bonded with each adhesive system and composite resins were added to the surfaces by packing the material into a cylindrical-shaped plastic matrix with an internal diameter of 2.5 mm and height of 3 mm. Shear bond testing was performed following 10 days incubation of specimens in distilled water at 37 degreesC. Results were analysed by Kruskal-Wallis ANOVA, and Mann-Whitney U multiple comparison test and Wilcoxon rank tests. The results obtained with CSE, SB, and EP were similar in caries affected and normal dentin (P > 0.05). But bonds made to normal dentin with OCB and PB were lower (P < 0.05) than bonds to caries-affected dentin. Bonding to caries-affected dentin with CSE (24.49 +/- 5.38), SB (21.49 +/- 9.15), and EP (21.19 +/- 9.17) showed shear bond strengths higher than OCB (17.43 +/- 9.78) and PB (14.10 +/- 7.94) (P < 0.05). Bonding to normal dentin with CSE (29.91 +/- 8.95) was the highest (P < 0.05). SB (21.17 +/- 5.41) and EP (17.45 +/- 6.21) showed shear bond strengths higher than OCB (11.99 +/- 10.15) and PB (10.57 +/- 4.56) (P < 0.05).Öğe Bond Strength of Three Different Dentin Bonding Systems to Abraded Dentin(Int Amer Assoc Dental Researchi a D R/a a D R, 2003) Karakaya, S.; Ünlü, Nimet; Say, E. C.; Özer, F.; Soyman, N.; Tagami, J.[Abstract not Available]Öğe Bond Strengths of Bonding Agents to Pulp Chamber Dentinal Wall(Int Amer Assoc Dental Researchi A D R/A A D R, 2002) Öztürk, B.; Özer, F.[Abstract not Available]Öğe Bonding Strength to Two Different Surfaces of Dentin Under Simulated Pulpal Pressure(2001) Belli, Sema; Ünlü, N.; Özer, F.Purpose: The purpose of this in vitro study was to measure and compare the in vitro shear bond strengths (SBS) of the following dentin bonding systems to different dentin surfaces under simulated pulpal pressure: Liner Bond 2 (self-etching) (LB2), Liner Bond 2V (self-etching) (LB2V), Opti Bond Solo (single component) (OBS), Fuji Bond LC (filled) (FBLC), Prime & Bond 2-1 (single component) (P&B2-1), and Solid Bond (total etching) (SB). Materials and Methods: Occlusal and buccal surfaces of 60 extracted human molars were prepared to expose the dentin bonding surface. After being wet ground with 600-grit abrasive papers, teeth were randomly assigned to 6 equal groups of 10 each. The dentin surfaces were treated with the bonding systems mentioned above, and resin composite cylinders (Clearfil AP-X) were built up under simulated pulpal pressure when diluted bovine serum was used as the pulpal fluid. After one day of storage in 37°C water, the specimens were shear tested to failure on an Instron machine. Results: The data were statistically analyzed with the Student's t-test and a post hoc Tukey test. Comparing buccal surfaces, the post hoc Tukey test indicated no significant differences among all the test groups (p > 0.05). On occlusal surfaces, the post hoc Tukey test indicated significant differences among the tested groups (p < 0.05). The Student's t test revealed significant differences between the occlusal and buccal shear bond strength values in LB 2, LB2V, and SB groups (p < 0.05). Conclusion: The strength of adhesion to dentin depends upon both the adhesive system used - with selfetching systems tending to show higher bond strengths than the other materials tested - and the location of the dentin, with significantly higher SBS being found on buccal surfaces in 3 of the 7 tested bonding systems.Öğe Bonding to Sound Vs. Caries-Affected Dentin Using Photo- and Dual-cure Adhesives(Int Amer Assoc Dental Researchi a D R/a a D R, 2003) Say, E. C.; Nakajima, M.; Senawongse, P.; Soyman, M.; Özer, F.; Tagami, J.[Abstract not Available]Öğe Comparison of Antibacterial Activity of Two Dentin Bonding Systems Using Agar Well Technique and Tooth Cavity Model(Elsevier Sci Ltd, 2003) Özer, F.; Karakaya, S.; Ünlü, Nimet; Erganiş, Osman; Kav, K.; Imazato, S.Objective. This study compared the antibacterial activities of two dentin bonding systems (ABF, Kuraray and Reactmer Bond, Shofu) by a conventional agar well technique and a newly designed in vitro test using tooth model. Methods. In the agar well technique, the test materials were filled in the welts of Muller Hinton agar plates inoculated with Streptococcus mutans NCTC10449, and the diameters of inhibition zones produced around the materials were measured after 24 h of incubation. For the tooth model test, three cavities (diameter 1 mm, depth 2 mm) were prepared in the flat occlusal dentin of human extracted molar. After sterilization, the teeth were left in broth culture of 1.56 x 10(8) CFU/ml of S. mutans at 37 degreesC for 72 h for allowing bacteria to invade the cavity. The dentin bonding systems were applied separately to each of the two infected cavities, and the third cavity was left unapplied for control. After seating the occlusat surfaces, the teeth were kept in physiologic saline solution at 37 degreesC for 72 h. The standardized amounts of dentin chips (120 +/- 5 mg) were obtained from the cavity walls and the number of bacteria recovered was determined. The results were analyzed by One Way ANOVA, Kruskal Wallis and Mann-Whitney's U tests. Results. The primer of ABF and Reactmer Bond produced inhibition zones with similar sizes (p > 0.05), but the bonding resin of ABF did not produce any inhibition. When tested by the mode( cavity method, the application of ABF resulted in significantly less bacterial. recovery than Reactmer Bond (p < 0.05), demonstrating substantial antibacterial effects. Conclusions. The tooth model method used in this study was effective for evaluating the substantial, antibacterial effects of dentin bonding agents, and the experimental dentin bonding system ABF was demonstrated to be able to inactivate the bacteria in the cavity effectively in comparison with little antibacterial activity shown by Reactmer Bond.Öğe Effect of Cavity Varnish, Amalgam Liner or Dentin Bonding Agents on the Marginal Leakage of Amalgam Restorations(BLACKWELL SCIENCE LTD, 2001) Belli, S.; Ünlü, N.; Özer, F.The purpose of this in vitro study was to compare marginal leakage of Class II amalgam restorations lined with different agents (two new generation dentin bonding systems, a cavity varnish and an amalgam liner). Forty freshly extracted human molar teeth were divided into five groups. Class II preparations were prepared in the mesial and distal surfaces of each molar. While the cavities in two groups were lined with two new generation bonding systems, the other two groups were treated with an amalgam lining material and a cavity varnish. Fifth group was used as control, without any lining. Amalgam was hand-condensed into each preparation. Specimens were thermocycled, stained and sectioned. Microleakage was graded using a stereomicroscope. Mean microleakage scores for occlusal and cervical margins were calculated and analised. For the leakage values on occlusal margins, Kruskal-Wallis test indicated no significant difference in all groups. For the leakage values on cervical margins, Kruskal-Wallis test indicated significant difference in four groups when compared with controls (P < 0.001). On the other hand, there was no significant difference between the occlusal and cervical leakage values in each group.Öğe The Effect of Simulated Intrapulpal Pressure on Bond Strength to Enamel and Dentine(WILEY, 2003) Şengün, A.; Öztürk, B.; Özer, F.The purpose of this study was to evaluate the effect of simulated intrapulpal pressure on the shear bond strength (SBS) of a self-etching bonding system (Clearfil Liner Bond II) to both enamel and dentine surfaces. Forty-two caries-free human molar teeth were randomly assigned to two equal groups (n =21). One group of 21 teeth was connected to a special pulpal pressure machine, which is developed to simulate in vivo conditions. The buccal and lingual surfaces of the teeth were prepared with a diamond wheel to create flat dentine and enamel surfaces. A self-etching bonding system was then applied under pulpal pressure and 2.5 mm diameter composite cylinders were bonded to the prepared surfaces. The samples were then stored in distilled water at room temperature for 24 h under pulpal pressure before SBS was tested. The second restored group was used as a control and the teeth were not connected to the pulpal pressure apparatus during material application and test procedures. They were stored for 24 h in distilled water at room temperature before the SBS test. Fracture analysis of the enamel and dentinal surfaces was performed using a stereomicroscope. Shear bond strength values to dentine was significantly reduced with pulpal pressure (P < 0.001). However, in the enamel, SBS was increased (P < 0.001). In the control group, the SBS values to dentine and enamel did not show any significant difference (P > 0.05). Based on these results, it can be concluded that further analysis of enamel histology and bonding mechanisms are needed.Öğe Effects of Antibacterial Agents on Bond Strength of a Self-Etching Adhesive System to Caries-Affected Dentin on the Gingival Wall(Int Amer Assoc Dental Researchi A D R/A A D R , 2003) Şengün, A.; Koyutürk, A. E.; Şener, Y.; Özer, F.[Abstract not Available]Öğe Evaluation of Antibacterial Effectiveness of Desensitizers Against Oral Bacteria(Int Amer Assoc Dental Researchi a D R/a a D R, 2003) Duran, I.; Şengün, A.; Hadimli, Hasan Hüseyin; Ülker, M.; Özer, F.[Abstract not Available]Öğe Influence of Surface Preparation in Resin/enamel Interface: a Sem Study.(Int Amer Assoc Dental Researchi a D R/a a D R, 2002) Şengün, A.; İpekdal, I.; Özer, F.; Yaşar, E.[Abstract not Available]Öğe Leptin Levels in Patients with Obstructive Sleep Apnea Syndrome and the Effect of Cpap Treatment Over Leptin Levels(OXFORD UNIV PRESS INC, 2010) Yosunkaya, S.; Doğan Ünüvar, F.; Okur, H.; Özer, F.[Abstract not Available]Öğe Reducing Microleakage in Composite Resin Restorations: an in Vitro Study.(INT AMER ASSOC DENTAL RESEARCHI A D R/A A D R, 2002) Ünlü, Nimet; Karakaya, S.; Özer, F.[Abstract not Available]Öğe Restoring Function and Esthetics in a Patient With Amelogenesis Imperfecta: a Case Report(QUINTESSENCE PUBLISHING CO INC, 2002) Şengün, A.; Özer, F.Amelogenesis Imperfecta is a hereditary disorder that affects enamel on primary and permanent teeth. It is a rare dental disease but represents a major restorative challenge for the dentist. A 14-year-old boy presented with sensitive, discolored, and mutilated teeth and a decreased vertical dimension of occlusion. The aim of treatment was to reduce dental sensitivity, to restore esthetics, and to correct the vertical dimension of occlusion. To modify the occlusion, and to protect the dentin from chemical and thermal attacks, nickel-chrome onlays were placed on the molars. To improve the esthetics of the incisors and premolars, resin composite restorations were applied. The patient was regularly recalled during the postoperative period. Radiographic and clinical examinations 10 months posttreatment revealed no evidence of disorders associated with the restored teeth or their supporting structures.Öğe Three Dimensional Microscopic Investigation of Resin/Cavity Wall Integrity.(Amer Assoc Dental Research, 2000) Özer, F.; Şengün, A.; Belli, Sema; Unlu, N.; Alkaya, F.[Abstract not Available]
