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	Dental Composite Biomaterials
		Modern dental composite materials are thus a blend of glass or ceramic particles dispersed in a photo-polymerizable synthetic organic resin matrix.
		The wearing mechanism of composites is not fully understood, but the breakdown of composites is known to be related to degradation resulting from hydrolytic, mechanical and enzymatic phenomena.
		The main problems with composite materials such as posterior restoratives are: lack of wear resistance, low modulus and incomplete polymerization, and polymerization shrinkage that adversely affects long-term survival.
	www.cda-adc.ca /jcda/vol-64/issue-10/732.html (2019 words)

	Composite dental material and method of preparing same - Patent 4028325
		Another composite material found to be useful in making crowns, bridge veneers and artificial teeth included a silica glass containing on a weight basis of between about 1.0%-20.0%, preferably 14.0%-18.0%, of alkali metal oxides in solution where the alkali metal oxides were selected from the group consisting of sodium oxide, potassium oxide and lithium oxide.
		Composite compositions containing similar formulations but with a fused silica or quartz filler have compressive strengths between 10 and 20% lower, and cannot be polished by any known technique available in dentistry.
		The composite is strong as shown in TABLE II, and it is bondable to the denture base in a manner similar to that used with plastic, as well as having a low modulus of 1.9 million psi which is 1/5 to 1/10th that of porcelain.
	www.freepatentsonline.com /4028325.html (4652 words)

	dental composite (Site not responding. Last check: 2007-10-16)
		Composite reviews anterior composite restoration of surface class 3, class 4, class 5, veneering, diastema closure, laterals, rotated teeth, periodontal papillae loss, repair, use as temporary crowns, general color management, surface shaping, contouring textring, hypocalcification and craze line placement, and indirect posterior composites esthetic recontouring.
		Composite materials, burs, bonding materials, placement instruments, curing finishing burs, finishing instruments, polishing instruments, strips materials, matrix and weding systems, impression systems were reviewed.
		composite is loaded into the mould and the thin transparent matrix is applied to the top base of the with the excess material extruded by between 2 microscope slides.
	www.thedentalinsurance.com /risk_.htm (1493 words)

	Composite for dental restorations - Patent 4020557
		The composites involve a methacrylate based system in which a silica or silicate glass filler is covalently bonded to a resin matrix, or to a coupling agent which is covalently bonded to both.
		Furthermore, it has been found that the compressive strength of a dental composite material formed with a relatively soft inorganic filler such as wollastonite is about equal to that of a composite made with a hard glass or mineral filler.
		Although the new composite material produced a restoration more opaque than conventional composites, the results were deemed highly effective and were observed to be aesthetically superior on specific tooth surfaces where the lines of demarcation between the restoration and the natural tooth surface were virtually if not completely undetectable to the naked eye.
	www.freepatentsonline.com /4020557.html (3802 words)

	Dental composite: What is the composition of tooth bonding (dental bonding)?
		You might be curious as to the composition of dental composite (the restorative material that is utilized with dental bonding technique).
		In comparison if the dental composite will be used in a cosmetic dental bonding application for a front tooth then fillers that enhance the composite's color and polishing characteristics will be emphasized in the formulation.
		The great convenience of using dental composite in this form is that the dentist can work with and shape the composite at their leisure, and then when satisfied with their efforts expose the composite to a curing light so to activate its set.
	www.animated-teeth.com /tooth-bonding/a6-dental-composite-bonding.htm (830 words)

	[No title]
		Because these composites are used in an aggressive, aqueous environment that constantly challenges the vulnerable silane mediated polymer-glass bond, understanding of this critical interfacial phase is being acquired so that strategies can be developed for its improvement.
		Dental research directions in support of the goals are established in collaboration with the American Dental Association(ADA), the National Institute of Dental Research, and guest scientists from the U.S. Navy and the U.S. Public Health Service.
		A dental resin consisting of equivalent mass fractions of BisGMA and TEGDMA (triethylene glycol dimethacrylate) photo- activated with camphorquinone (CQ) and ethyl 4-N,N-dimethylaminobenzoate (4EDMAB) was used to prepare the composites.
	www.msel.nist.gov /structure/polymers/techactv95/dentmed.html (5203 words)

	Dental Materials
		Modern dental practice has become very dependent on its materials, such that the dentist's greatest challenge is choosing the right combinations of them for the benefit of their patients.
		A modern dental composite consists of a paste created by combining a mixture of dimethacrylate monomers and cross-linking agents (known in dentistry as resins) with up to 80% by weight of silane-coated, ceramic particles (the filler), whose sizes range from 0.04-4 microns.
		This composite paste is packed into a dental cavity and the dentist exposes it for about 30 seconds to intense visible blue light.
	www.azom.com /details.asp?ArticleID=527 (2168 words)

	[No title]
		SO - Dental Materials 1992 Jul;8(4):224-8 AB - The specific aims of this study were to: 1) measure the occlusal wear of four different dental composite materials placed in the posterior teeth of adults; and 2) evaluate the effect of the clinical parameters, cavity class and tooth type on occlusal wear.
		The aim of this study was to determine the feasibility of using fatigue-testing of a complex dental restoration and to evaluate the mechanical fatigue behavior of premolar teeth restored with a titanium alloy post and an amalgam or composite core.
		Composites are prone to wear, fracture and a lack of marginal seal; whilst porcelain is brittle, difficult to manipulate and has the ability to wear opposing enamel.
	www.lib.umich.edu /dentlib/nihcdc/searches/mccomb/mccomb1e-3.txt (19474 words)

	dental composite (Site not responding. Last check: 2007-10-16)
		The first successful composite bite plane was constructed with light cured dental composite.
		Composite resin restorations have emerged on the esthetic dentistry scene...
		The polymeric matrix of a dental composite is formed by free radical polymerization, under ambient conditions, of a resin which is one or more vinyl monomers, usually of the methacrylate class.
	basekb.info /rp/tc/dental-composite (297 words)

	AMALGAM AND COMPOSITE FILLINGS: (Site not responding. Last check: 2007-10-16)
		Composite resin dental restorative materials are also subject to wear during eating due to abrasive foods and friction with opposing teeth, resulting in the steady loss of material from filled tooth surfaces (Sulong and Aziz 1990).
		surface area of composite resin, depending on the composition of the composite resin and whether or not the unpolymerized surface layer was removed.
		Dental materials are not subjected to the same stringent or rigorous pre-market review procedures, to screen for potential health risks, as are drugs, numerous medical devices, pesticides, food additives, and industrial chemicals.
	www.bcd.com.au /Documents/Richardson98.html (9056 words)

	What are Composite Resin Fillings (Site not responding. Last check: 2007-10-16)
		Composite resin dental fillings were created as an alternative to traditional metal dental fillings.
		Composite resins may also be used to enhance the appearance of any tooth, which is a tooth bonding procedure.
		Composite resin fillings are applied in thin layers, and slowly built up to form the complete filling.
	www.drboettcher.com /fillings.htm (528 words)

	Composite Dental Filling - Dentalfind.com
		Thanks to advances in modern dental materials and techniques nowdays teeth can be restored with a more aesthetic and natural appearance by using white fillings.
		Before filing a tooth with composite filling it is necessary to remove decay and prepare the tooth for the filling. When a tooth is conditioned, a thin resin is applied and it further bonds to the surface of the tooth.
		Once placed composite fillings are hardened by shining an intense light on them for a specified period of time. This light cures the layers of fillings. You usually get six to seven layers for a bigger hole but with composite filling you can fill even a microscopic hole.
	www.dentalfind.com /Composite_Dental_Filling (440 words)

	What Is a Compomer?
		Dental composites are polymer-ceramic materials in which methacrylate and dimethacrylate monomers polymerize to form the matrix and glasses, ceramics or glass-ceramics are incorporated as spherical fillers.
		They were marketed as a new class of dental materials that would provide the combined benefits of composites (the “comp” in their name) and glass ionomers (“omer”).
		Dental practitioners should have a good understanding of basic dental materials science principles to enable them to critically assess the plethora of new materials that are constantly being introduced and aggressively marketed.
	www.cda-adc.ca /jcda/vol-65/issue-9/500.html (2506 words)

	Dental Composite Materials Research (Site not responding. Last check: 2007-10-16)
		The in vivo degradation of posterior dental composite restorative materials is some combination of mechanical, physical, and chemical phenomena leading to volumetric occlusal material loss and marginal breakdown under loading.
		The combination of surface adhesive and abrasive wear, cohesive subsurface fracture of the bulk, fatigue, and stress-environment interactions is not well understood for this force loading profile.
		Differential parameters may include variations of the polymeric matrix; filler size, shape, composition, or distribution; interfacial bonding between the filler and the matrix; and environmental variations of testing temperature, liquid media, or bolus.
	www.dental.uab.edu /departments/prosthodontics/givan/research.htm (404 words)

	Austin Dental -- Composite Veneers (Site not responding. Last check: 2007-10-16)
		We have placed composite veneers on your teeth.
		These restorations were placed with the finest materials and techniques available today.
		Please call us if you notice any changes or have any questions about your veneers.
	www.lifetimedental.com /index.php3?id=37 (188 words)

	fortis dental with bearing, leasing, composite and placa
		Improvements in the traditional highspeed dental bearing design mean smoother operation, longer life, higher speeds, and reduced maintenance.
		The multiple uses of lasers in dentistry involves soft tissue surgery, dental composite curing, replacement of the dental drill and pain relief and biostimulation of lesions.
		02/10/04 - anestesicos dentales caries dentales with coronas, anestesicos, instrumentos and enfermedades
	www.soele.com /fortisdental.htm (1725 words)

	Austin Dental -- Composite Veneers (Site not responding. Last check: 2007-10-16)
		A veneer is a thin sheath of material which is bonded to the tooth to hide discoloration.
		A composite veneer is made of tooth colored resin.
		For details on composite veneers, see our Patient Education Sheet on caring for composite veneers that we give to our patients who have recently received composite veneers.
	www.lifetimedental.com /index.php3?id=130 (103 words)

	Relief hologram replication using a dental composite as an embossing tool
		The surface structure is copied into dental photopolymer composite by direct contact and subsequent photo-polymerization.
		Due to its excellent mechanical and thermal properties, micro-patterned dental composite can be further used as an embossing tool for mass production of holograms.
		S. Savić Šević and D. Pantelić, "Relief hologram replication using a dental composite as an embossing tool," Opt.
	www.opticsexpress.org /abstract.cfm?URI=OPEX-13-7-2747 (612 words)

	3M Filtek P60 Posterior Restorative Dental Composite (Site not responding. Last check: 2007-10-16)
		Filtek P60 posterior restorative is an esthetic, light cured, radiopaque composite specifically designed for use in posterior direct or indirect restorations.
		Bonding to tooth structure is accomplished by using a dental adhesive system, such as 3M Single Bond or 3M Scotchbond Multi-Purpose Adhesive Systems.
		The matrix of this composite is a resin consisting of BIS-GMA (Bisphenol A diglycidyl ether dimethacrylate), UDMA (urethane dimethacrylate), and Bis-EMA (Bisphenol A polyethylene glycol diether dimethacrylate).
	www.matweb.com /search/SpecificMaterialText.asp?bassnum=PMMM00 (325 words)

	Appendix I: References
		Proceedings of Symposium on Dental Pulp: Reactions to Restorative Materials in the Presence or Absence of Infection.
		Mjör, I.A.; and Wennberg, A. (1985): Biocompatibility Considerations of Composite Resins.
		Proceedings of the Intemational Symposium on Posterior Composite Resins.
	www.health.gov /environment/amalgam1/appendixI-refer.htm (5649 words)

	Dental Glossary (Site not responding. Last check: 2007-10-16)
		dental pulp; the internal chamber of a tooth
		dental specialist treating the gums and supporting soft and hard tissues retaining natural teeth and the surgical placement of dental implants
		dental specialist skilled in restoring or replacing teeth with fixed or removable prosthesis (appliance), maintaining proper occlusion; treats facial deformities with artificial prostheses such as eyes, ears, and noses
	www.dentistry.com /glossary2.html (2277 words)

	Standardized cytotoxicity tests for dental composite materials with quality assurance (Site not responding. Last check: 2007-10-16)
		(3) Finally, four different composite materials at variable increment thickness were analysed.
		(3) The cytotoxicity of each composite was significantly higher when polymerized in 5-mm than 2.5-mm increments (p<0.0001).
		Conclusion: Cytotoxicity tests should be further standardized, particularly in regard to specimen production protocols, to ensure results are internationally comparable and to make these tests useful as a tool for risk assessment.
	iadr.confex.com /iadr/2004Hawaii/techprogram/abstract_44761.htm (266 words)

	New Product: Dental Composite Based on Polyhedral Oligomeric Silsesquioxane
		Pentron Clinical Technologies have introduced the first commercial dental product based on polyhedral oligomeric silsesquioxane or POSS.
		The resin infiltrates etched surfaces and provides a strong bond between the tooth and dental restorative material.
		The kit includes a unique etch primer and adhesive system that work together and provide excellent bonding to dentin and cut enamel.
	www.azom.com /details.asp?ArticleID=1609 (176 words)

	ADC Advanced Dental Composite
		- Ten years of experience : Our team invents, conceives and produces prosthetic components in fibre reinforced composite for the best known brands.
		- Compatible with your usual adhesive and core build up composite
		We offer direct sales of generic products with certified results ex works at reduced prices.
	www.advanced-dental-composite.com /accueil.php?lang=en (110 words)

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