• Pahlavan A, Hasani Tabatabaei M, Arami S, Ataie M, Valizadeh S. Comparison of Polymerization Shrinkage in Methacrylate and Silorane-Based Composites Cured by different LEDs. (ac.ir)
  • The aim of this study was to evaluate the polymerization shrinkage of these two composites. (ac.ir)
  • ISO 17304:2013 specifies a test method for the measurement of the polymerization shrinkage of external energy-activated polymer-based restorative materials such as composites and core materials. (iso.org)
  • Determination of polymerization shrinkage of different composites using a photoelastic method. (bvsalud.org)
  • The new and experimental resin composites showed significantly less polymerization shrinkage stress than the conventional resin composite (Filtek Supreme XTE). (bvsalud.org)
  • Proposition: The objective of this study was to evaluate how the volumetric shrinkage (VS), degree of conversion (DC), maximum rate of reaction (RPmax), polymerization stress (PSmax) and maximum rate of stress development (RSmax) of two experimental composites are influenced by the photoinitiator concentration ([photo]) and by the irradiance. (usp.br)
  • Therefore, incremental placement of resin composites has been suggested to reduce polymerization shrinkage stress [ 11 ]. (hindawi.com)
  • Polymerization shrinkage of visible-light-cured composites. (thejcdp.com)
  • Developing a more complete understanding of stresses produced in dental composites during polymerization. (thejcdp.com)
  • The aim of this study was to compare the degree of conversion and polymerization shrinkage of low and high viscosity bulk-fill giomer-based and resin-based composites. (koreamed.org)
  • Objective: To assess the effect of the cavity design factor (C-factor) on polymerization stress development (PSD) in resin composites. (nist.gov)
  • Temperature rise occurs during photoactivation of dental composites due to the exothermic polymerization reaction and different curing units. (jida.ir)
  • The composites containing particles based on PHE- MA/SiO2 offer the possibility of reduced polymerization shrinkage without severe reductions in flow characteristics of the prepolymerized resin. (conicet.gov.ar)
  • Professor Bailey invented a new class of monomers that expand during polymerization, resulting in high-strength adhesives, strain-free composites, and strongly adhering coatings. (nae.edu)
  • Compared to universal resin composites, flowable composites have greater polymerization shrinkage and inferior mechanical properties due to their lower filler percentage. (dentaleconomics.com)
  • Results: Mean results identified a wide volumetric shrinkage range with considerable similarity overlap. (uky.edu)
  • The amount of reinforcing filler in the final composite will be determined as a compromise between optimizing both the rheological properties and the volumetric shrinkage without jeopardizing the mechanical properties required by a particular application. (conicet.gov.ar)
  • Glass slab and sample were placed on a special LVDT holder in order to light cure from bottom surface and to measure the polymerization shrinkage. (ac.ir)
  • Polymerization shrinkage in Methacrylate-based composite is one of the most important factors in composite restorations failure. (ac.ir)
  • Comparison of polymerization shrinkage of pattern resins. (tomorrowtooth.org)
  • To investigate the polymerization shrinkage gap of different universal composite resins. (bvsalud.org)
  • Differences in the organic matrix, as well as in the filler content, significantly affected the polymerization shrinkage gap of universal composite resins. (bvsalud.org)
  • However, one of the major shortcomings of conventional composite resins is polymerization shrinkage. (hindawi.com)
  • There have been many advances to composite resins in terms of strength, shrinkage, polishability, durability and esthetics. (dentalproductsreport.com)
  • The fact is, all composite resins exhibit some polymerization shrinkage and for that reason, multiple thin increments are recommended to avoid the detrimental effects of shrinkage. (dentalproductsreport.com)
  • Temper-ature rise during polymerization of visible light-activated composite resins, Dent Mater. (jida.ir)
  • Epoxy resins or binders exhibit high strength and low shrinkage during cure. (globalspec.com)
  • Furan resins are formed from the polymerization or poly condensation of furfural, furfural alcohol, or other compounds containing a furan ring. (globalspec.com)
  • In spite of all the advantages resulting from their intrinsic characteristics, it should be noted though that composite resins still have inconveniences related in the first place to the polymerization contraction/shrinkage, which causes a gap between the obturation and the dental tissue further resulting in the generation of marginal micro-infiltrations with all the related drawbacks. (revmaterialeplastice.ro)
  • Our work uses the simultaneous measurement of the degree of conversion, polymerization stress, the change in reaction temperature, and shrinkage strain in situ. (nist.gov)
  • Significance: Polymerization shrinkage deformation was compensated by hygroscopic expansion within 4 weeks in teeth restored with a hydrophobic resin composite, while a hydrophilic restorative over-compensated polymerization shrinkage within 1 week causing tooth expansion. (umn.edu)
  • The objective of this study was to evaluate, at different irradiances, the conversion-dependent shrinkage behavior of (meth)acrylates as a function of monomer reactivity, resulting network stiffness and hydrogen bonding potential. (umich.edu)
  • The purpose of this study was to evaluate polymerization of TheraCal LC, one of the tricalcium silicate cements. (koreamed.org)
  • The fillers used in Filtek™ Bulk Fill Flowable Restorative were chosen to maximize strength, wear resistance and radiopacity and to minimise shrinkage while still maintaining good flowable handling. (3m.com.au)
  • Background: As a restorative material used to treat dental caries, the light-curing type resin is widely used, but it has the disadvantage of polymerization shrinkage. (koreamed.org)
  • Inconsistent shrinkage behavior was evident and all materials reached maximum values before 24 h. (uky.edu)
  • Analytical and finite element analyses have been performed on a cantilever-beam based methodology (tensometer) for evaluating the development of stresses as the concomitant of constrained polymerization shrinkage. (nist.gov)
  • However, after posts have been cemented with resin agents, stresses produced by polymerization shrinkage may harm the integrity of the bond between the resin cement and the root canal walls [ 1 ]. (hindawi.com)
  • Silorane-based composite (P90) showed significantly less polymerization shrinkage than that of methacrylate-based composite (Z250). (ac.ir)
  • Practitioners should yield to the potential effect of shrinkage stress development, because this might affect marginal integrity in the clinical performance. (bvsalud.org)
  • Low polymerization shrinkage, resulting in better marginal integrity. (dentistrytoday.com)
  • Some low viscosity bulkfill-restoratives generate less shrinkage stress compared to other conventional or bulk-restoratives. (bvsalud.org)
  • Temperature-induced shrinkage range of the dual responsive hydrogels was higher and broader than that of the conventional poly(N-isopropylacrylamide) hydrogel. (ias.ac.in)
  • Then, the samples were polished, and, after 24 hours, the polymerization shrinkage gaps were measured by scanning electronic microscopy. (bvsalud.org)
  • This can lead to shrinkage stress and rarely to marginal gaps and failure. (wikipedia.org)
  • A Compari-son of composite curing parameters: Effects of light source and curing mode on conversion, temperature rise and polymerization shrinkage. (jida.ir)
  • 5. Hussey DL, Biagioni PA & Lamey PJ, Ther-mographic measurement of temperature change during resin composite polymerization invivo. (jida.ir)
  • In vitro pulp chamber temperature rise during composite resin polymerization with various light curing sourse. (jida.ir)
  • Thermal properties for specialty concrete and mortar include service temperature, thermal conductivity, and the coefficient of thermal expansion (CTE), the amount of linear expansion or shrinkage that occurs in a material with a change in temperature. (globalspec.com)
  • First , they should have reduced polymerization shrinkage to minimize the chance of failure due to microleakage. (dentalproductsreport.com)
  • Silorane-based composite is introduced to compensate this drawback and claimed to have low shrinkage. (ac.ir)
  • Can hygroscopic expansion compensate polymerization shrinkage? (umn.edu)
  • Dive into the research topics of 'Can hygroscopic expansion compensate polymerization shrinkage? (umn.edu)
  • The intelligent monomer and filler selection allows a 4mm depth of cure, low shrinkage and low polymerization stress thereby enabling bulk placement. (3m.com.au)
  • Purpose: The study's purpose was to evaluate the 24-hour polymerization shrinkage of resin composite core materials. (uky.edu)
  • Dual-activated cements provide long working time until they are exposed to light activation, and, due to the chemical polymerization process, their bond strength continues to increase over time [ 13 ]. (hindawi.com)
  • The samples were stored, light -protected and dry (23°C). Polymerization shrinkage stress data (MPa) were calculated 15 minutes, 1 and 24 hours after light exposure, based on the diameter of the isochromatic curves of first order, obtained from araldite plates. (bvsalud.org)
  • This study aimed to determine whether the curing times of Xtra Power and High Power modes of high-power light emitting diode (LED) curing light are sufficient for polymerization of resin. (koreamed.org)
  • The main disadvantages are that it requires heating to reach maximum cure strength, and relies on strong alkalis to activate the polymerization process. (seasteading.org)
  • The delay in shrinkage in relation to conversion has been demonstrated to be dependent on irradiance, monomer reactivity, secondary intermolecular interactions and stiffness of the network. (umich.edu)
  • A novel dual responsive hydrogelwas synthesized by inversemicroemulsion polymerization, using itaconic acid as pH-responsive monomer and N- isopropylacrylamide as thermo-responsivemonomer. (ias.ac.in)
  • Polymerization shrinkage of composite resin is closely related to direct or indirect restoration failure. (koreamed.org)
  • Shrinkage (linometer) and conversion (near-IR) were followed simultaneously during photopolymerization (3 or 30 mW/cm 2 ). (umich.edu)
  • Resin composite restoratives differ in their polymerization shrinkage stress development, independent of their viscosity . (bvsalud.org)
  • The mean of polymerization shrinkage in Z250 cured with LED and High Power LED was 11.15±0.08µm and 11.51±0.17µm, respectively (P=0.094), and in P90 cured with LED and High Power LED was 1.08±0.06µm and 1.16±0.12µm, respectively (P=0.019). (ac.ir)
  • Shrinkage consistently increased for all products and it is not known if the continued shrinkage magnitude may compromise the stability and fit of all-ceramic crowns at 24 h. (uky.edu)
  • The key features are related to the improved polymerization shrinkage and the greater depth of cure. (dentalproductsreport.com)
  • They demonstrate a low polymerization shrinkage stress at the same time [ 12 , 13 ]. (hindawi.com)
  • Shrinkage data was statistically compared using Friedman/Dunn's test for intragroup analysis and Kruskal Wallis/Dunn's test for intergroup analysis, all at a 95% level of confidence (α = 0.05). (uky.edu)