Biomaterial Database

Fracture toughness of resin-modified glass ionomers. 1995

R E Kovarik, and M V Muncy

Chandler Medical Center, Department of Oral Health Practice, University of Kentucky, College of Dentistry, Lexington, KY 40536-0084, USA.

OBJECTIVE To measure and compare the fracture toughness of a multi-purpose resin composite, four light-cured glass ionomers, one light-cured resin ionomer, and two silver-containing glass ionomers. METHODS Ten specimens were fabricated for each of the eight materials: Herculite XRV, Fuji II LC, Photac-Fil, Vitrebond, Photac-Bond, VariGlass VLC, Ketac-Silver, and Miracle Mix. All materials were handled according to manufacturers' instructions during specimen fabrication, stored in 100% humidity for 2 weeks, and tested wet in a universal testing machine. RESULTS The mean fracture toughness values (MPa . m(0.5) + or - S.D.) were: Herculite XRV = 1.17 + or - 0.09, Fuji II LC = 1.37 + or - 0.10, Photac-Fil = 1.27 + or - 0.08, VariGlass = 0.90 + or - 0.07, Vitrebond = 0.88 = or - 0.06, Photac-Bond = 1.09 + or - 0.09, Ketac-Silver = 0.51 + or - 0.08, and Miracle Mix = 0.30 + or - 0.07. There was a significant difference in the means (ANOVA P<0.0001). Fuji II LC and Photac-Fil were significantly tougher than any of the other materials (Tukey's HSD test P<0.01).

UI	MeSH Term	Description	Entries
D008027	Light	That portion of the electromagnetic spectrum in the visible, ultraviolet, and infrared range.	Light, Visible,Photoradiation,Radiation, Visible,Visible Radiation,Photoradiations,Radiations, Visible,Visible Light,Visible Radiations
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
D012117	Resins, Synthetic	Polymers of high molecular weight which at some stage are capable of being molded and then harden to form useful components.	Dental Resins,Dental Resin,Resin, Dental,Resin, Synthetic,Resins, Dental,Synthetic Resin,Synthetic Resins
D003188	Composite Resins	Synthetic resins, containing an inert filler, that are widely used in dentistry.	Composite Resin,Resin, Composite,Resins, Composite
D004339	Drug Compounding	The preparation, mixing, and assembly of a drug. (From Remington, The Science and Practice of Pharmacy, 19th ed, p1814).	Drug Formulation,Drug Preparation,Drug Microencapsulation,Pharmaceutical Formulation,Compounding, Drug,Formulation, Drug,Formulation, Pharmaceutical,Microencapsulation, Drug,Preparation, Drug
D005899	Glass Ionomer Cements	A polymer obtained by reacting polyacrylic acid with a special anion-leachable glass (alumino-silicate). The resulting cement is more durable and tougher than others in that the materials comprising the polymer backbone do not leach out.	Glass Ionomer Cement,Glass Polyalkenoate Cement,Polyalkenoate Cement,Polyalkenoate Cements,Glass Polyalkenoate Cements,Glass-Ionomer Cement,Cement, Glass Ionomer,Cement, Glass Polyalkenoate,Cement, Glass-Ionomer,Cement, Polyalkenoate,Cements, Glass Ionomer,Cements, Glass Polyalkenoate,Cements, Glass-Ionomer,Cements, Polyalkenoate,Glass-Ionomer Cements,Ionomer Cement, Glass,Polyalkenoate Cement, Glass
D000180	Acrylic Resins	Polymers of high molecular weight which are derived from acrylic acid, methacrylic acid or other related compounds and are capable of being molded and then hardened to form useful components.	Acrylic Resin,Resin, Acrylic,Resins, Acrylic
D000704	Analysis of Variance	A statistical technique that isolates and assesses the contributions of categorical independent variables to variation in the mean of a continuous dependent variable.	ANOVA,Analysis, Variance,Variance Analysis,Analyses, Variance,Variance Analyses
D016722	Cermet Cements	Fluoride-releasing restorative materials made by the sintering of metal (usually silver) particles to glass ionomer powder. Glass ionomers are fluoride-releasing cements that are not very durable. Sintering of the metal particles is a means of improving those physical properties that will make the glass ionomer cement more durable.	Cermet,Ketac-Silver,Cements, Cermet,Ketac Silver,KetacSilver
D019279	Resin Cements	Dental cements composed either of polymethyl methacrylate or dimethacrylate, produced by mixing an acrylic monomer liquid with acrylic polymers and mineral fillers. The cement is insoluble in water and is thus resistant to fluids in the mouth, but is also irritating to the dental pulp. It is used chiefly as a luting agent for fabricated and temporary restorations. (Jablonski's Dictionary of Dentistry, 1992, p159)	Resin Cement,Cement, Resin,Cements, Resin