Degree of Vinyl Conversion, Polymerization Shrinkage and Stress Development in Experimental Endodontic Composite
نویسندگان
چکیده
منابع مشابه
Shrinkage stress and degree of conversion of a dental composite submitted to different photoactivation protocols.
The aim of this study was to evaluate the polymerization stress and degree of conversion of a composite submitted to different photoactivation protocols. The composite Filtek Z350 was placed in the central perforation of a photoelastic disc and polymerized using a LED-based curing unit (BluePhase II--Ivoclar Vivadent) with energy density of 12, 24 or 36 J/cm2 using the following photopolymeriza...
متن کاملEffect of temperature on composite polymerization stress and degree of conversion.
OBJECTIVE To test the following hypotheses: (1) degree of conversion (DC) and polymerization stress (PS) increase with composite temperature (2) reduced light-exposure applied to pre-heated composites produces similar conversion as room temperature with decreased PS. METHODS Composite specimens (diameter: 5mm, height: 2mm) were tested isothermally at 22°C (control), 40°C, and 60°C using light...
متن کاملVolumetric Polymerization Shrinkage of Contemporary Composite Resins
The polymerization shrinkage of composite resins may affect negatively the clinical outcome of the restoration. Extensive research has been carried out to develop new formulations of composite resins in order to provide good handling characteristics and some dimensional stability during polymerization. The purpose of this study was to analyze, in vitro, the magnitude of the volumetric polymeriz...
متن کاملPolymerization shrinkage of dental composite resins.
Aesthetic materials have always been a priority for the restoration of anterior teeth; increasingly, they have also gained prominence in the restoration of posterior teeth. This has been due to their advantages as an alternative to amalgam. Their drawbacks however, can include poor marginal adaptation, postoperative sensitivity and cuspal movement. These are particularly associated with the pol...
متن کاملEffect of Light-curing Units and Activation Mode on Polymerization Shrinkage and Shrinkage Stress of Composite Resins
The aim of this study was to evaluate the polymerization shrinkage and shrinkage stress of composites polymerized with a LED and a quartz tungsten halogen (QTH) light sources. The LED was used in a conventional mode (CM) and the QTH was used in both conventional and pulse-delay modes (PD). The composite resins used were Z100, A110, SureFil and Bisfil 2B (chemical-cured). Composite deformation u...
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ژورنال
عنوان ژورنال: Journal of Biomimetics, Biomaterials and Tissue Engineering
سال: 2009
ISSN: 1662-100X
DOI: 10.4028/www.scientific.net/jbbte.4.1