Biomaterial Database

[Effect of polymerization-shrinkage of different resin composites curing by two different light curing units]. 2011

Xiao-lin Deng, and Bao-wei Zhang, and Peng Lu

Department of Prosthodontics, Ninth People's Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine, Shanghai Key Laboratory of Stomatology, Shanghai 200011, China. dengxl118@163.com

OBJECTIVE To investigate the effect of light-emitting diode (LED) light curing unit (LCU) and quartz-tungsten (QTH) LCU on the polymerization-shrinkage of different resin composites. METHODS Three composites Z100, Z250, AP-X were irradiated by QTH LCU and LED LCU. Polymerization-shrinkage of 50s and 400s after the composites curing were measured by 3D-profile measuring apparatus by phase-shifted projected grating.The polymerization-shrinkage of LED and QTH curing composites were analysed by SPSS12.0 software package of one-way ANOVA. RESULTS At 50s curing and 400s curing period, the polymerization- shrinkage of Z100, Z250 resin was different by QTH LCU and LED LCU curing, the polymerization-shrinkage by LED LCU curing was less than that by QTH LCU (P < 0.05); the polymerization-shrinkage of AP-X was not statistically different by QTH LCU and LED LCU curing (P > 0.05). CONCLUSUINS: The polymerization-shrinkage of Z100,Z250 resin is statistically less cured by LED LCU than QTH; the polymerization-shrinkage of AP-X resin is not statistically different cured by QTH LCU and LED LCU. Supported by Research Fund of Science and Technology Commission of Shanghai Municipality (08DZ2271100).

UI	MeSH Term	Description	Entries
D008422	Materials Testing	The testing of materials and devices, especially those used for PROSTHESES AND IMPLANTS; SUTURES; TISSUE ADHESIVES; etc., for hardness, strength, durability, safety, efficacy, and biocompatibility.	Biocompatibility Testing,Biocompatible Materials Testing,Hemocompatibility Testing,Testing, Biocompatible Materials,Testing, Hemocompatible Materials,Hemocompatibility Testings,Hemocompatible Materials Testing,Materials Testing, Biocompatible,Materials Testing, Hemocompatible,Testing, Biocompatibility,Testing, Hemocompatibility,Testing, Materials,Testings, Biocompatibility
D008689	Methacrylates	Acrylic acids or acrylates which are substituted in the C-2 position with a methyl group.	Methacrylate
D003188	Composite Resins	Synthetic resins, containing an inert filler, that are widely used in dentistry.	Composite Resin,Resin, Composite,Resins, Composite
D006244	Hardness	The mechanical property of material that determines its resistance to force. HARDNESS TESTS measure this property.	Hardnesses
D055117	Curing Lights, Dental	Light sources used to activate polymerization of light-cured DENTAL CEMENTS and DENTAL RESINS. Degree of cure and bond strength depends on exposure time, wavelength, and intensity of the curing light.	Dental Curing Lights,Halogen Dental Curing Lights,LED Dental Curing Lights,Plasma Arc Dental Curing Lights,Curing Light, Dental,Dental Curing Light,Light, Dental Curing,Lights, Dental Curing
D058105	Polymerization	Chemical reaction in which monomeric components are combined to form POLYMERS (e.g., POLYMETHYLMETHACRYLATE).	Polymerizations