Biomaterial Database

Fracture toughness of provisional resins for fixed prosthodontics. 1987

A G Gegauff, and H G Pryor

Six resins for treatment restorations were tested to determine fracture resistance. The resins were broadly categorized chemically as: one epimine, two poly(methyl methacrylate)s, one composite, and two poly (R' methacrylate)s. Miniature compact tension specimens were molded and then cured for 5 minutes at atmospheric pressure or at an additional pressure of approximately 0.14 MPa. A commercially available pressure vessel was used for curing. The epimine and two poly(methyl methacrylate) resins demonstrated the greatest fracture toughness whereas poly (R' methacrylate) had the lowest. The composite, representing a new class of provisional material, recorded an intermediate fracture toughness. The use of a pressure vessel during polymerization did not significantly increase the fracture toughness of the six resins. There was minimal effect of pressure on the surface of the specimens but it reduced the internal porosity evident in the atmospheric pressure-cured specimens.

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
D008768	Methylmethacrylates	The methyl esters of methacrylic acid that polymerize easily and are used as tissue cements, dental materials, and absorbent for biological substances.
D011109	Polymethacrylic Acids	Poly-2-methylpropenoic acids. Used in the manufacture of methacrylate resins and plastics in the form of pellets and granules, as absorbent for biological materials and as filters; also as biological membranes and as hydrogens. Synonyms: methylacrylate polymer; poly(methylacrylate); acrylic acid methyl ester polymer.	Methacrylic Acid Polymers,Acid Polymers, Methacrylic,Acids, Polymethacrylic,Polymers, Methacrylic Acid
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
D003830	Denture, Partial, Fixed	A partial denture attached to prepared natural teeth, roots, or implants by cementation.	Fixed Bridge,Fixed Partial Denture,Pontic,Bridge, Fixed,Bridges, Fixed,Denture, Fixed Partial,Dentures, Fixed Partial,Fixed Bridges,Fixed Partial Dentures,Partial Denture, Fixed,Partial Dentures, Fixed,Pontics
D006801	Humans	Members of the species Homo sapiens.	Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D013314	Stress, Mechanical	A purely physical condition which exists within any material because of strain or deformation by external forces or by non-uniform thermal expansion; expressed quantitatively in units of force per unit area.	Mechanical Stress,Mechanical Stresses,Stresses, Mechanical
D013499	Surface Properties	Characteristics or attributes of the outer boundaries of objects, including molecules.	Properties, Surface,Property, Surface,Surface Property