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Öğe The color differences of direct esthetic restorative materials after setting and compared with a shade guide(Amer Dental Assoc, 2011) Barutcigil, Cagatay; Harorli, Osman Tolga; Yildiz, Mehmet; Ozcan, Erdal; Arslan, Hakan; Bayindir, FundaBackground. The authors conducted a study to evaluate esthetic restorative materials' color differences after setting and color matching between set materials and a shade guide. Materials and Methods. The authors evaluated 13 resin-based composites, one silorane-based composite, two polyacid-modified resin composites and one conventional glass ionomer cement. They measured the color parameters of the samples, which were 8 millimeters in diameter and 1 5 mm in thickness, before and after they were set according to the Commission International de l'Eclairage (CIE) L*a*b* color scale relative to standard illumination against a white background by means of a dental colorimeter. They also compared the final colors of the restorative materials with a shade guide. Results. Color difference values for each restorative material ranged from 3.25 to 14.04. With the exception of Fuji IX (GC, Tokyo), Filtek P60 (3M ESPE) and Te-Econom (Ivoclar Vivadent), the restorative materials exhibited a perceptible color change after setting. Color difference values between the set materials and the shade guide tabs ranged from 1.86 to 11.83. With the exception of Filtek Supreme XT (3M ESPE) and Fuji IX, the materials exhibited a perceptible difference. Conclusion. Most of the materials tested exhibited a significant color change after polymerization and did not match the shade guide tab after undergoing light curing.Öğe Effect of Boric Acid Versus Conventional Irrigation Solutions on the Bond Strength Between Fiber Post and Root Dentin(Quintessence Publishing Co Inc, 2017) Culhaoglu, Ahmet Kursad; Ozcan, Erdal; Kilicarslan, Mehmet Ali; Seker, EmrePurpose: To compare the effect of boric acid solutions of different percentages to conventional irrigation solutions on the adhesive bond strength between fiber posts and radicular dentin surface with different cement types. Materials and Methods: One hundred fifteen extracted human incisors were endodontically instrumented to a length of 14-15 mm, and 12-mm post spaces were prepared with specific drills. Cylindrical fiber posts (Panavia Post) were luted with two different composite cements (Panavia F 2.0, Panavia SA) and cut into 1-mm-thick slices. These specimens were randomly allocated to 5 groups according to the irrigant applied: 1. control, no irrigant; 2. 10 ml of 2% chlorhexidine; 3. 10 ml of 5.25% NaOCl for 5 min and 10 ml of 17% EDTA for 3 min; 4. 10 ml of 5% boric acid solution at a temperature of 55 degrees C for 60 s; 5. 10% boric acid solution, conditions as in group 4. Bond strength was determined using the push-out test. Microscopic assessment and SEM evaluations were performed in combination with push-out tests. Results: The push-out bond strengths of cervical segments were significantly higher than for the middle and apical segments in all groups. The type of irrigation solution used significantly affected the bond strengths of the posts. The 10% boric acid solution and EDTA + NaOCl irrigation solutions provided the highest bond strengths (p < 0.005). SEM analysis showed that the dentin tubules were open and the smear layer was completely removed when EDTA/NaOCl and 10% boric acid were used as irrigation agents. Conclusion: Boric acid solutions, especially at a concentration of 10%, can be a viable alternative to the conventional irrigants used during endodontic treatment. The extent to which the 10% boric acid solution successfully removed the smear layer and the ease of rinsing boric acid from the root surface are advantageous.Öğe Effects of ethylenediaminetetraacetic acid and sodium hypochlorite on the bond strength of bonding agents to pulp chamber lateral walls(Elsevier Taiwan, 2014) Barutcigil, Cagatay; Harorli, Osman Tolga; Ozcan, Erdal; Arslan, Hakan; Yildiz, MehmetBackground/purpose: The purposes of this in vitro study were to determine the microtensile bond strengths of four different dentin adhesive materials placed in pulp chamber walls, and to test the effects of 5% sodium hypochlorite (NaOCl) and 17% ethylenediaminetetraacetic acid (EDTA) pretreatments on resin dentin bond strengths. Materials and methods: Recently extracted human third molars were selected. The teeth were divided into four groups. Specimens in each group were treated as follows: irrigated with distilled water; irrigated with EDTA for 5 minutes; irrigated with sodium hypochlorite for 5 minutes; and irrigated with EDTA for 5 minutes followed by NaOCl. for 5 minutes. Treated specimens were dried, bonded with a total-etching adhesive, two self-etching adhesives, or a one-bottle self-etching adhesive system. After the bonding procedure and composite restoration, teeth were sectioned, and 15 dentin sticks were obtained. Microtensile testing was performed, and scanning electron micrographs were taken of each irrigated group. Results: In the control group, the one-bottle self-etching adhesive system showed statistically higher bond strength values. EDTA irrigation did not affect the bond strength except for the total-etching adhesive. NaOCl significantly reduced the bond strengths of all adhesives. The EDTA and NaOCl combination did not show a statistically significant reduction in bond strengths of the adhesives to pulpal dentin. Conclusion: There was a reduction in bond strengths of all adhesive systems used to test pulp chamber lateral walls after endodontic irrigation solutions were used. Copyright (C) 2012, Association for Dental Sciences of the Republic of China. Published by Elsevier Taiwan LLC. All rights reserved.Öğe Root and canal morphology of maxillary first premolars in a Turkish population(Elsevier Taiwan, 2012) Ozcan, Erdal; Colak, Hakan; Hamidi, Mehmet MustafaBackground/purpose: The purpose of this study was to evaluate root and canal morphology in maxillary first premolars in a Turkish population. Materials and methods: We collected 653 maxillary premolars from patients who came for extractions needed for several reasons, such as caries or prosthodontic or orthodontic treatment. The extracted teeth were thoroughly washed and cleaned to remove blood, saliva, or debris. The cleaned samples were then stored in normal saline till further experiment was carried out. A sample of maxillary first premolars was subjected to visual examination and digital radiography to determine the number of roots and root canals and their types. Results: Of the 653 teeth, 295 (45.2%) had one, 351 (53.7%) had two, and three molars (1.1%) had three roots. Of these, 7.8% (51 teeth) had single canal (Type I canal), 90.7% (592 teeth) had two canals (Types II and III), and 1.5% (10 teeth) had three canals (Type IV). Conclusion: Turkish maxillary first premolars are mainly two rooted and predominantly have Type III canal morphology. Copyright (C) 2012, Association for Dental Sciences of the Republic of China. Published by Elsevier Taiwan LLC. All rights reserved.
