نتایج جستجو برای: resin based composites

تعداد نتایج: 2994217  

Journal: :علوم و تکنولوژی پلیمر 0
مریم حاجی حسینی آرش پیامی سیدرضا غفاریان امیرمسعود رضادوست

in the processing of carbon/carbon composites using polymer resin as the matrix precursor, it is inevitable that a porous structure was formed after carbonization. as a result, densification by liquid phase impregnation followed by recarbonization is required to obtain a densified composite. consequently, the char formability of resin is an important factor in reducing the number of densificati...

Journal: :journal of dental research, dental clinics, dental prospects 0
abiodun arigbede department of restorative dentistry, faculty of dentistry, university of port harcourt, port harcourt, nigeria bukola folasade adeyemi department of oral pathology, faculty of dentistry college of medicine, university of ibadan ibadan, oyo state. omowumi femi-akinlosotu department of anatomy, faculty of basic medical sciences college of medicine, university of ibadan ibadan, oyo state, nigeria

background and aim: in vitro studies have revealed a direct association between resin content and cytotoxicity of resin composites; but implantation studies in this regard are sparse. this study investigates the relationship between filler content of composite resins and biocompatibility. materials and methods: this study was conducted using 18 male wistar rats (180-200g), 1 nano-hybrid (prime-...

Journal: :Dental materials journal 2018
Takatsugu Yamamoto Masao Hanabusa Saori Kimura Yasuko Momoi Tohru Hayakawa

The objective of this study was to investigate changes in polymerization stress and elastic modulus for light-cured bulk-fill resin composites following irradiation. Crack analysis was applied to obtain the stresses for 24 h after irradiation, which were calculated from the lengths of cracks in a glass mold bonded to the composites. The elastic modulus was repeatedly measured by nano-indentatio...

Journal: :Nanoscale 2010
Joanna Górka Mietek Jaroniec Wojciech L Suchanek

Novel α-alumina crystalline nanosheets are used for the preparation of alumina-carbon composites, in which the latter component is phenolic resin-based ordered mesoporous carbon. A unique feature of these composites is perpendicular orientation of ordered mesopores of the carbon to the (001) facets of nonporous α-alumina nanosheets accompanied by significant enlargement of these mesopores in co...

Journal: :Dental materials journal 2018
Takako Yoshikawa Alireza Sadr Junji Tagami

This study evaluated the effects of the light curing methods and resin composite composition on composite polymerization contraction behavior and resin composite adaptation to the cavity wall using μCT-3D visualization analysis and dye penetration test. Cylindrical cavities were restored using Clearfil tri-S Bond ND Quick adhesive and filled with Clearfil AP-X or Clearfil Photo Bright composite...

Journal: :Dental materials journal 2016
Takako Yoshikawa Makoto Morigami Alireza Sadr Junji Tagami

The aim of this study was the effects of different light curing methods on marginal sealing and resin composite adaptation to the cavity wall using the dye penetration test and environmental scanning electron microscope (SEM) observations. Cylindrical cavities were prepared on cervical regions. The teeth were restored with Clearfil Liner Bond 2 V adhesive and filled with Clearfil Photo Bright o...

2011
Hye-Jung Park Sung-Ae Son Bock Hur Hyeon-Cheol Kim Yong-Hoon Kwon Jeong-Kil Park

The degree of resin polymerization achieved during a restoration placement is a major factor in the success and predictability of resin composite restorations. The polymerization of resin composite depends on many intrinsic conditions, such as the type of the photoinitiator, composition of filler particles, shade and degree of translucency of the materials. In addition, the effective spectral o...

Ali Eskandarizadeh Faranak Rahimi Kheyzaran Baharlooyi Mohammad-Reza Naeimi-Jamal Nafiseh Elm-Amooz

Introduction: Resin composites are an important part of restorative treatment in modern dentistry. There are many trademarks available in Iran market and physico-chemical properties of many of these resin composites are not evaluated yet. This study was carried out to evaluate the physico-chemical properties of four available resin composites and also to assess the effect of aging on their prop...

Journal: :Journal of the Royal Society, Interface 2007
S A Hayes W Zhang M Branthwaite F R Jones

Self-healing resin systems have been discussed for over a decade and four different technologies had been proposed. However, little work on their application as composite matrices has been published although this was one of the stated aims of the earliest work in the field. This paper reports on the optimization of a solid-state self-healing resin system and its subsequent use as a matrix for h...

Journal: :Journal of oral science 2009
Yumiko Hosoya Takanobu Shiraishi Maki Oshiro Susumu Ando Masashi Miyazaki Franklin García-Godoy

Color characteristics of the shades for different filler type resin composites were compared in the reflectance and transmittance modes, and specular component included (SCI) and specular component excluded (SCE) geometries for reflectance mode. Resin composites and shades used in this study were submicron filled Estelite Sigma (Sigma: Inc, A2, A3, B3, C2, OA2, OA3) and nanofilled Filtek(TM) Su...

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