نتایج جستجو برای: self cure
تعداد نتایج: 553777 فیلتر نتایج به سال:
اخیرا با کاربرد ترمیمهای همرنگ غیرمستقیم، تحقیقات جهت یافتن ماده مناسب جهت چسباندن این ترمیمها وسعت زیادی یافته است. سیمانهای رزینی به لحاظ استحکام، زیبایی، و ضخامت لایه ای مطلوب، کاربرد مناسبی در این زمینه دارند و انواع آنها با سیستمهای مختلف پلیمریزاسیون (شیمیایی، نوری، dual) بدین منظور توصیه شده اند؛ لیکن سیمانهای dual cure به دلیل ادعای کارخانه ها مبنی بر این که پس از قطع نور، پلیمریزاسیون ...
زمینه و هدف: پست های همرنگ غیر فلزی به واسطه سیمان رزینی و مواد چسبنده عاجی به دیواره کانال دندان می چسبند. دوام ترمیم به استحکام این اتصال وابسته است زیرا استحکام باند پست به ریشه منجر به گیر بهتر و توزیع مناسب تنش می شود. هدف از این مطالعه بررسی استحکام باند پست d.t. light توسط دو نوع سیمان رزینی self-cure و dual-cure و بررسی اثر مواد شوینده مختلف داخل کانال بر میزان استحکام باند این دو نوع س...
Abstract Introduction: One-bottle light-cured adhesives systems have variable pH. In addition to ease of use, universal adhesives can be used in various restorations and different substrates. Due to the lack of studies, the purpose of this study was to compare the enamel and dentin micro-leakage of self-cure and light cure composite restorations using a universal bonding system. Materials...
Introduction:One-bottle light-cured adhesives systems have variable pH. In addition to ease of use, universal adhesives can be used in various restorations and different substrates. Due to the lack of studies, the purpose of this study was to compare the enamel and dentin micro-leakage of self-cure and light cure composite restorations using a universal bonding system. Materials & Methods:The ...
Statement of Problem: Composite reins have recently become popular for posterior teeth restorations. Gap formation and subsequent microleakage are of the complications resulting from such restorations. One of the techniques to overcome polymerization shrinkage of composite resins is sandwich technique (application of glass ionomer as a base beneath the composite resin). Since polymerization pat...
Introduction: To evaluate and compare shear bond strength of self-cure and light-cure composites using a universal bonding system. Materials and Methods: Superficial coronal dentin of 62 intact extracted premolars was exposed and bonding agent (All-Bond Universal) was applied over the dentin surface according to the manufacturer instruction (self-etch mode). Then samples were distribut...
Background and Aims: Radiopacity is an essential requirement for all restorative materials. Radiopaque materials allow the dentist to diagnose and assess radiographically the restoration, primary caries, assessment of contours, overhang and secondary caries. The aim of this study was to evaluate the radiopacity of two types of dental bases and liners in comparison whit dental structure using a ...
The samples were prepared according to the routine work for sample preparation in dental laboratories. After reaching dough stage, the mixture packed into dumbbell shaped of stainless steel mould and pressed in a hydraulic bench press for 25 min at room temperature. For heat-cure, the polymerization cycle was carried out using water bath, while self-cure done at room temperature. The residual m...
BACKGROUND Endodontically treated teeth with excessive loss of tooth structure are frequently restored using fiber posts. In this in vitro study, the apical leakage of self- and dual-activated curing modes for dual-curing resins cementing a translucent fiber post was evaluated using computerized fluid filtration meter and dye extraction method. MATERIAL AND METHODS One hundred and four extrac...
OBJECTIVES To compare the polymerization contraction stress of resin cements in dual-cure and self-cure modes, and verify its effect on microleakage and gap formation in class I cavities restored with porcelain inlays. METHODS Dual-cure cements (Calibra, Choice and RelyX ARC) were monitored for contraction stress during 30 min in the tensilometer, in the presence or absence of photo-activatio...
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