Resin-Based Composites in Dentistry

Organic Resin Matrix = Provides high viscosity paste Inorganic Glass Filler = Constitutes 70-80% of high viscosity paste Coupling Agent = Provides chemical affinity Diluent crosslinkers = Includes TEGDMA

BisGMA = Cross-linked with entanglements TEGDMA = Low molecular weight and diluent UDMA = High molecular weight with two methacrylate groups 10-MDP = Acts as an adhesion promoter

Bis-GMA = Bulky monomer with reduced polarity HEMA = Low molecular weight with one methacrylate group UDMA = High molecular weight with two methacrylate groups 10-MDP = No hydrogen bonding and hydrophobic

<p>Direct filling material = Clinical indication for resin-based composites Composite inlay = Indirect restoration using resin composite Fissure sealant = Direct application in preventive dentistry CAD/CAM crowns = Indirect restoration involving computer-aided design</p> Signup and view all the answers

<p>Bis-GMA = Two OH groups and one aromatic group HEMA = One OH group and no aromatic groups UDMA = No OH groups and two methacrylate groups 10-MDP = One P=O group and no aromatic groups</p> Signup and view all the answers

<p>Monomer (e.g., BisGMA) = Primary component of the resin matrix Diluent crosslinkers (e.g., TEGDMA) = Aids in reducing viscosity and crosslinking Inhibitor = Component that prevents premature polymerization Coupling agent (e.g., 10-MDP) = Enhances adhesion to tooth structure</p> Signup and view all the answers

<p>Base/catalyst = Substance that initiates or accelerates a chemical reaction by interacting with the reactants Photosensitiser = A compound that absorbs light and transfers its energy to another molecule, starting a chemical reaction Resin Matrix Technology = A composite material consisting of a polymer matrix reinforced with other materials Chemical cure = The process of hardening a material through a chemical reaction rather than physical methods</p> Signup and view all the answers

<p>Wavelength / nm = The distance between successive points of a wave, measured in nanometers Molar absorptivity (L/mol.cm) = A measure of how well a substance absorbs a particular wavelength of light Absolute irradiance (mW/cm2.nm) = The total power per unit area emitted by a light source at a specific wavelength Visible Light Curing = A method of curing materials using visible light as the energy source</p> Signup and view all the answers

<p>Camphoroquinone (CQ) = A commonly used photoinitiator in dental composites Monoacylphosphine oxide (MAPO) = An alternative photoinitiator with different reactivity compared to CQ Methods of photoinitiation = Various techniques used to initiate polymerisation reactions using light Increased working time = Benefit of using certain photoinitiators that allow for extended manipulation time before curing</p> Signup and view all the answers

<p>Weak interface = May lead to interfacial degradation and bulk fracture in composite materials Stronger interface = Results in improved mechanical properties of the composite material Silane is an amphiphilic molecule = Has the potential to accelerate water uptake in certain regions within the composite No mixing = Characteristic of two-paste composites where base and catalyst are separate until application</p> Signup and view all the answers

<p>Radical scavenger = Improves ambient light stability by preventing unwanted polymerisation reactions Command set = Refers to a specific system that controls the initiation and progression of polymerisation processes Styling web pages = (Not applicable) Filler-resin coupling weak interface = (Not applicable)</p> Signup and view all the answers