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    Effect of new innovative restorative carbomised glass cement on intrapulpal temperature rise: an ex-vivo study
    (SOCIEDADE BRASILEIRA DE PESQUISA ODONTOLOGICA, 2016) Botsali, Murat Selim; Tokay, Ugur; Ozmen, Bilal; Cortcu, Murat; Koyuturk, Alp Erdin; Kahvecioglu, Firdevs
    This study aimed to evaluate the temperature changes that occurred in the pulp chamber when using GCP Glass Carbomer Fill (GCP) and two different resin-modified glass-ionomer (RGI) restorative materials at different dentin thicknesses. A standardized Class I occlusal cavity with 1 mm or 2 mm dentin thickness was prepared in the extracted human molar teeth. RGI and GCP fills were placed in the cavities and cured with two different light-curing units. This study included a total of 120 samples, with 20 samples in each group. The pulp microcirculation method was used for measuring the intrapulpal temperature changes. Statistical analysis was performed using the two-way ANOVA and Tukey HSD multiple comparison tests. Statistically significant differences were observed between 1 mm and 2 mm dentin thicknesses (p < 0.001). The GCP groups (both 1 mm and 2 mm dentin thicknesses) exhibited higher temperatures than the other groups (p < 0.001), and Fuji II LC and Photac Fil Quick Aplicap showed similar values (p > 0.05). The highest temperature changes were observed with 1 mm dentin thickness. While RGI materials in both dentin thicknesses did not cause temperature changes that were harmful to the pulp, GCP CarboLED LCU caused the highest intrapulpal temperature rise, and these values were borderline harmful to the dental pulp.
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    Effects of Er:YAG Laser on Bond Strength of Self-etching Adhesives to Caries-Affected Dentin
    (WILEY-BLACKWELL, 2014) Koyuturk, Alp Erdin; Ozmen, Bilal; Cortcu, Murat; Tokay, Ugur; Tosun, Gul; Sari, Mustafa Erhan
    The erbium:yttrium-aluminum-garnet (Er:YAG) laser may be effective the bond strength of adhesive systems on dentine surfaces, the chemical composition and aggressiveness of adhesive systems in clinical practice. The purpose of this study was to evaluate the effects of the Er:YAG laser system with the bonding ability of two different self-etching adhesives to caries-affected dentine in primary molars. Ninety mid-coronal flat dentine surfaces obtained from sound and caries-affected human primary dentine were treated with an Er:YAG laser or a bur. The prepared surfaces were restored with an adhesive system (Xeno V; Clearfil S-3) and a compomer (Dyract Extra). The restored teeth were sectioned with a low-speed saw and 162 samples were obtained. The bond strength of the adhesive systems was tested using the micro-tensile test method. The data were statistically analyzed. A restored tooth in each group was processed for scanning electron microscopy evaluation. The values of the highest bond strength were obtained from the Clearfil S-3-Er:YAG laser-sound dentine group in all groups. (24.57 +/- 7.27 MPa) (P>0.05). The values of the lowest bond strength were obtained from the Xeno V-Er:YAG laser-sound dentine group in all groups (11.01 +/- 3.89 MPa). It was determined that the Clearfil S-3 increased the bond strength on the surface applied with Er:YAG laser according to the Xeno V. Microsc. Res. Tech. 77:282-288, 2014. (c) 2014 Wiley Periodicals, Inc.
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    Influence of the bulk fill restorative technique on microleakage and microtensile of class II restorations
    (Elsevier Ltd, 2014) Koyutürk, Alp Erdin; Tokay, Uğur; Sarı, M. Erhan; Özmen, Bilal; Cortcu, Murat; Acar, Hamdi; Ülker, Mustafa
    Background & Aim: The aim of this study is to evaluate microleakage and bond strength test of the bulk fill restorative technique. Materials and methods: ÆLITE LS Posterior and SureFil SDR flow were used as composite restoration, and Clearfil S3 (Self Etch system) Bond and Prime&Bond NT (Total Etch system) were used as bonding agents. Standardized Class II cavities were made on sixty extracted premolar teeth and they were randomly divided into four groups. Thermo-cycling and mechanical loading was applied to all samples. The samples were stored in the %2 basic fuchsine solutions and the microleakage was evaluated. Results: When total etching system groups were evaluated, the cervical microleakage values were higher than occlusal microleakage values on both composites (P < 0.05), but there were no differences between the self-etch groups. Microtensile test was also applied to the samples. When the MPa values of all groups were compared, there was a very significant difference statistically (P < 0.001). Conclusions: The results support the conclusion that the SureFil SDR flow exhibited the best performance in occlusal margins of Prime&Bond NT-SureFil SDR groups. Copyright © 2014 The Japanese Society of Pediatric Dentistry.