Yaşar Meriç Tunca

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OBJECTIVE Widespread use of rotary nickel-titanium systems has caused manufacturers to produce gutta-percha cones that match the taper of the canals prepared with these systems. Obturations with these cones may provide 3-dimensional obturation of the root canal in less time. The aim of this study was to use a fluid filtration method to compare the apical(More)
OBJECTIVE This study compared the cyclic fatigue resistance of ProTaper rotary nickel-titanium (NiTi) files in artificial canals with 2 different radii of curvature. STUDY DESIGN One hundred ProTaper rotary instruments were used in this study. Twenty files of each size (S1, S2, F1, F2, and F3) were tested. Cyclic fatigue testing was performed using a(More)
Propolis is an agent having antimicrobial properties, however, its composition can vary depending on the area where it is collected. In the present study, the antimicrobial activity of five propolis samples, collected from four different regions in Turkey and from Brazil, against nine anaerobic strains was evaluated. Ethanol extracts of propolis (EEP) were(More)
OBJECTIVE This study compared the shaping ability of Hero Shaper and RaCe instruments in simulated curved canals. STUDY DESIGN Forty simulated canals in resin blocks were divided into 2 experimental groups, each comprising 20 resin blocks, and prepared with Hero Shaper and RaCe using the crown-down technique. Preoperative and postoperative photographs,(More)
OBJECTIVE Dentin hypersensitivity, or what patients may describe as "sensitive teeth," is defined as a short, sharp pain arising from exposed dentin in response to thermal, evaporative, tactile, electrical, osmotic or chemical stimuli. It is widely accepted that dentin hypersensitivity is an uncomfortable condition that also affects function and quality of(More)
OBJECTIVE This study aimed to test the hypothesis that aggressive dentin removal through greater-tapered instrumentation reduces the intracanal bacteria more effectively than conservative dimension instrumentation. MATERIAL AND METHODS Twenty extracted human lower premolar teeth were used. After extirpation of the pulps, the teeth were autoclaved and(More)
OBJECTIVE The aim of this study was to investigate the effect of sodium hypochlorite immersion on the surface characteristics of RaCe rotary nickel-titanium instruments using atomic force microscopy (AFM). STUDY DESIGN Four new RaCe instruments were used in this study (two 30.06 and two 30.02). One 30.06 and one 30.02 instrument were immersed in sodium(More)
INTRODUCTION This single-blind, randomized controlled trial aimed to evaluate whether foraminal enlargement (FE) with a continuous rotary system during endodontic treatment causes more postoperative pain than nonforaminal enlargement (NFE). METHODS Seventy qualified patients were randomized into 1 of 2 groups in a 1:1 ratio using a series of random(More)
AIM To test the hypothesis that, Epiphany, either in its mixed form or as separate components, can alter the vascular reactivity of isolated rat thoracic aorta. The possible mechanism of its vascular action was also investigated. METHODOLOGY The relaxant effect of the base, the catalyst and mixed Epiphany on isolated rat aortic rings pre-contracted with(More)
OBJECTIVES The control of postoperative pain is very important for the success of root canal treatment. The aim of this study was to research the factors that affect pain periods and pain intensity during and after endodontic treatment. METHODS The study included 128 patients. The teeth were grouped according to their type, location and vitality. Root(More)