摘要:
A bone substitute that drills and cuts like bone for use in training and testing comprising an inner core of a foamable polymer or other soft material and an outer shell of a polymer such as an epoxy resin with a particulate filler such as aluminum oxide or silicon carbide added thereto together with, in some cases, titanium oxide to form a slurry for casting or molding around the inner core. Also provided is a method for making the bone substitute.
摘要:
A biocompatible polyester comprising repeating units derived from glycerophosphorylcholine or glycerophosphorylethanolamine and at least one di- or poly-functional acid or reactive derivative thereof is haemocompatible and may be used in components for handling body fluids and in prostheses.
摘要:
A porcelain paste comprising a porcelain powder mixed with an aqueous colloidal dispersion of a urethane polymer. The paste can be applied as the first layer to a dental coping, and does not need to be fired prior to the addition of the body porcelain layers.
摘要:
The present invention provides a two-component composition for use to form a solvent-free fixing material suitable for use in dentistry, which fixing material is liquid at room temperature and has a viscosity in the range of from 5,000 to 100,000 cP, said compositions having: a first component comprising at least one organic polyisocyanate with aliphatically and/or cycloaliphatically bonded isocyanate groups; and a second component comprising (a) at least one polyhydroxy compound having a molecular weight in the range of from 200 to 20,000, being substantially free of ether groups, and having at least 2 aliphatically bonded OH groups and (b) from 1 to 60% by weight, relative to the total mixture, of monohydric and/or polyhydric alcohols with a molecular weight below 200 and/or from 0 to 40% by weight, relative to the total mixture, of oligomeric polyesters containing at least 2 OH groups or ester-diols, with an average molecular weight of from 100 to 500, the first and second components of the mixture being present in amounts corresponding to a NCO/OH ratio of from 0.8:1 1.2:1.
摘要:
An adhesive composition is provided for the hard tissues of the human body which comprises (1) a radical-polymerizable monomer and a curing system comprising (2) a peroxide, (3) an amine (or its salt) and (4) a salt of a sulfinic acid. The composition is available in two independent packages, one of which contains (1) and (2) the other package (3) and (4). Alternatively, one package contains (1) and (3) the other package (2) and (4).
摘要:
Resinous materials for restoring crowns is disclosed herein, said materials prepared by mixing a modified polymethyl methacrylate in the liquid state with powders of a methacrylic resin polymer.
摘要:
Novel bromine-containing compounds of the formula ##STR1## in which R is an alkylidene radical having 1 to 6 carbon atoms, a cycloalkylidene radical or a SO.sub.2 radical, R' is an alkylene radical having 2 to 6 carbon atoms or a cycloalkylene radical and Y is an acyl radical of a carboxylic acid having 2 to 6 carbon atoms and optionally bearing an aromatic substituent, and x is 1 or 2 and y is 0, 1 or 2, which are particularly useful for the preparation of dental replacement parts and dental models when mixed with a substance that catalyzes the polymerization of the compounds.
摘要:
A novel calcium fluoroaluminosilicate glass consisting essentially of from 25 to 35% by weight of silicon calculated as silica, from 30 to 40% by weight of aluminum calculated as alumina, from 20 to 35% by weight calcium, calculated as calcium oxide, and up to 9% by weight fluorine (preferably 4-7%) can be associated with a poly(carboxylic acid) e.g. as an intimate mixture of glass and acid to constitute a composition curable on contact with water and useful, for example, as a loading on a splinting bandage. Such a bandage preferably has a ratio of set time to gel time from 4:1 to 8:1 with a minimum gel time of 60 seconds.
摘要:
The present invention provides a lining material for a polymerized methylmethacrylate denture restoration which consists essentially of an admixture of approximately 40% of methylmethacrylate polymer, approximately 10% of methylmethacrylate monomer, and approximately 50% of butyl phthalyl butyl glycolate. The denture liner material is semi-cured for approximately 5 minutes at a temperature of about 160.degree.F. into a soft, tacky material having no inherent rigidity and which can be manually shaped to conform to an irregular object. The denture liner material can also be semi-cured for approximately 15 minutes at a temperature of 160.degree.F. into a somewhat hard material which is capable of being softened by application of heat and pressure. Both the soft semi-cured liner material and the somewhat hard semi-cured liner material are capable of being finally cured with a polymerized methylmethacrylate denture and adhered thereto to provide a soft liner therefor. The invention also provides methods for preparing the liner material and for adhering it to a polymerized methylmethacrylate denture.
AND R1 IS HYDROGEN, LOWER ALKYL, OR HALOGEN, ARE UTILIZED AS BINDERS IN DENTAL RESTORATIVE COMPOSITIONS. THE COMPOUNDS ARE PREPARED BY THE REACTION OF AN ACRYL CHLORIDE AND DERIVATIVES THEREOF WITH THE APPROPRIATE DIOL.