نتایج جستجو برای: cercon
تعداد نتایج: 76 فیلتر نتایج به سال:
Background and Aims: Since a large marginal opening allows more plaque accumulation, gingival sulcular fluid flow and bone loss, microleakage, recurrent caries and periodontal disease, marginal fit is of great importance in fixed restorations. The aim of this study was to compare the marginal fit of zirconium-based all ceramic (Cercon) frameworks, made by two different approaches (Direct and Wa...
2 CONTEMPORARY ESTHETICS | NOVEMBER 2006 While functional restorations in complicated prosthodontic cases are routinely used therapeutically, they can occasionally be esthetically discouraging. The introduction of a new class of high strength, high density, and high durability materials, such as Cercon Zirconia (Dentsply), DC Zircon (Popp DCS), inVizion (Vident), and Procera Z (Nobel Biocare), ...
The aim of this study was to evaluate and compare the fracture resistance definitive zirconia dioxide restorations obtained using a computer-aided design manufacturing (CAD/CAM) system. Methods: Two groups ten samples were analyzed for each material (n: 20); first group Zolid Gen X Amann Girrbach (ZGX) second Cercon HT Dentsply Sirona (CDS). designed with identical parameters milled CAD/CAM Eac...
سابقه و هدف: از آنجا که در سیستمهای تمام سرامیکی موجود، کور زیرکونیایی به صورت رایج و به شکل یک لایه با ضخامت یکنواخت ساخته میشود، پرسلن ونیر شده در نواحی مختلف ضخامتهای متفاوتی داشته، در نتیجه تحت تاثیر نیروهای مضغی سریعتر دچار Chipping و در نهایت شکست میشود. هدف از این مطالعه مقایسه نیروی منجر به شکست روکشهای تمام سرامیکی ساخته شده با دو طراحی مختلف کور زیرکونیایی در سیستم Cercon در شرا...
زمینه و هدف: امروزه استفاده از رستوریشن های تمام سرامیک به علت خواص فیزیکی آن ها همچون ترانسلوسنسی و ظاهری زیبا افزایش یافته است. مطالعات زیادی اثر روش های متنوع آماده سازی سطح را بر روی استحکام باند زیرکونیا با سمان های رزینی بررسی کرده اند. هدف مطالعه حاضر مقایسه میزان استحکام باند ریزبرشی دو نوع کور زیرکونیایی cercon و zirkonzahn با دو نوع سمان رزینی panavia f2 و rely x unicem2 پس از انجام ت...
Background and Aims: Increase of esthetic demands among dental patients has led to development and wide spread use of tooth colored ceramic systems for fabricating fixed restorations. However, they do not have same capability of matching the target color. The aim of this study was to compare the color coordinates of three widely used systems with A2 tab from a Vita Lumin Classic shade guide. ...
Background and Aims: Reliable bonding between tooth substrate and zirconia-based ceramic restorations is always of great importance. The laser might be useful for treatment of ceramic surfaces. The aim of the present study was to investigate the effect of laser irradiation on the shear bond strength of zirconia ceramic surface to dentin. Materials and Methods: In this experimental in vitro stu...
The present study evaluated the marginal and internal adaptation of single-tooth zirconium dioxide (ZrO2) ceramic copings or crowns with three different finish line designs. Twenty-four steel dies were prepared for maxillary central incisor crowns with the following finish line designs: shoulder (S), rounded shoulder (RS), and chamfer (C) preparations. Twenty-four standardized ZrO2 ceramic copi...
Nano-zirconia is commonly used in dentistry as a framework material over which feldspathic porcelain layered to form an aesthetic and strong bi-layered restoration. Sufficient bonding strength between zirconia frameworks veneering porcelains crucial for the longevity of zirconia-based dental restorations. This study aims determine shear bond (SBS) colloidal-processed slip-casted novel nano-zirc...
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