نتایج جستجو برای: tetric ceram
تعداد نتایج: 610 فیلتر نتایج به سال:
Purpose: The aim of the study is to evaluate color stability a conventional composite resin and bulk-fill resins.
 Material Methods: A total 120 samples 10 mm diameter 2 thickness were prepared from three (Beautifil Bulk-Fill, Filtek One Tetric N-Ceram Bulk-Fill) one (Z250) light cured. Initial measurements made with spectrophotometer. Samples for each randomly divided into 3 groups (black...
OBJECTIVES To evaluate the in vitro blending effect (BE) of layered resin composites related to material, shade, and differences in color and translucency between compared materials. METHODS Specimens made of two composites (2CS, n=5) consisted of the outer composite with an outer diameter of 10mm, 4mm thick and an inner diameter of 4mm, 2mm thick for the inner composite. Thus, the inner comp...
The aim of this in vitro study is to investigate the effects acidic beverages on discoloration bulk-fill composites with different viscosities. 144 disc-shaped specimens (8mm diameter × 2mm thick) were prepared from four composite resins including a nanohybrid (Filtek Ultimate), two packable Bulk Fill, Tetric N Ceram Fill), and flowable (Tetric Flow Fill). each group divided into 3 subgroups su...
Background and Aims: The aim of this study was to measure the degree of conversion (DC) of three types of composite resins (micro-hybrid, nano-hybrid and Ormocer) with different light curing units (LED LCU and QTH LCU) in two depths. Materials and Methods: Three commercially available dental resin composites were used in this study: (Tetric Ceram, Ivoclar Vivadent, Liechtenstein-A2 shade), (Te...
مقایسه میزان ریزنشت در روشهای ترمیم حفرات clv در دندانهای خلفی دکتر نرمین محمدی* - دکتر رضا خضریان** -* استادیار گروه آموزشی ترمیمی دانشکده دندانپزشکی دانشگاه علوم پزشکی تبریز. -** دندانپزشک. چکیده زمینه و هدف: علی رغم بهبود خصوصیات کامپوزیت ها گلاس یونومرها و دیگر مواد همرنگ دندان، هنوز هم استفاده کلینیکی از آنها با مسائلی همراه است. برخی از این مسائل شامل حساسیت تکنیکی، تغییر رنگ ری...
Background and Aim: Halogen lamp is the commonly used light source for composite photo polymerization. Recently, high power halogen lamps, LED and plasma arc are introduced for improving the polymerization. The aim of this study was to investigate the effect of conventional and high power halogen lamps and LED light curing unit on degree of conversion of two different composite resins.Materials...
Background and Aim: The majority of commercial curing units in dentistry are of halogen lamp type. The new polymerizing units such as blue LED are introduced in recent years. One of the important side effects of light curing is the temperature rise in composite resin polymerization which can affect the vitality of tooth pulp. The purpose of this study was to evaluate the temperature rise in two...
Posterior composite restorations, due to polymerization contraction, result in microleakage. Different methods have presented to reduce this phenomena. The aim of this study is to evaluate the effects of flowable and condensable composites to reduce microleakage. Seventy extracted human teeth were prepared with proximal class II cavities with gingival margin 1 mm below CEJ. The teeth randomly w...
Dentifrice abrasiveness and brushing time may increase color change (∆E) and surface roughness (∆Ra) of resin composites. This study aimed to evaluate the effect of mechanical brushing time of dentifrices with different abrasiveness on ∆E and ∆Ra of nanofilled (Z350, 3M ESPE) and nanohybrid (Tetric N-Ceram, Ivoclar Vivadent) resin composites. Sixteen specimens (12 mm diameter x 2 mm thick) were...
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