Abstract:
The invention provides dental composition system having curable liquid which is useful alone as a light curable composition and which is useful by mixing with a powder in preselected proportions to form dual cure compositions. The composition system is useful as bonding agent, cement, liner, base, restorative, pit and fissure sealants, and/or core build-up material, having improved adhesion to dentin. After storing the powder and the liquid in separate containers for at least two weeks and then mixing a portion of the powder and a portion of the liquid to form a mixture, the polymerizable compound polymerizes within 20 minutes of the mixing to form a first polymeric material having a flexural strength of at least 50 MPs, and an expansion in water at 37 DEG C after 90 days of less than 1 percent by volume.
Abstract:
The invention provides a transducer activated subgingival tool for contacting subgingival tooth surfaces and directing a fluid adjacent to said surfaces, wherein the tool has an activated tip having a fluid inlet end, a subgingival outlet end, a step in the surface of the outer wall of said tip between said inlet end and said subgingival outlet end, and a fluid passageway wall internal to the tip. The passageway wall is formed in the inlet end generally along the longitudinal center axis of the inlet end of the tip.
Abstract:
A fluoride releasing dental pit and fissure sealant dispensing system including a cartridge having a nozzle with a capillary conduit wall enclosing a capillary passage extending to a dispensing opening from a cylindrical chamber enclosing a sustained release dental pit and fissure sealant composition having a viscosity of less than 30,000 cps and including a polymerizable acrylic monomer, fluoride releasing glass particles and a fluoride containing salt. The salt is at least one hundred percent more soluble in water than calcium fluoride. The nozzle has a length to diameter ratio of at least six, and is readily bendable to form an arc of at least 30 degrees between the center line of the cylindrical chamber and the center line of the distal end of the nozzle.
Abstract:
Improved two component polymerizable polyorganosiloxane compositions are described, particularly for use in making dental impressions, having improved tear strength and wettability. Improved tear strength results from inclusion of a quadri-functional polysiloxane having a vinyl content of 0.16 to 0.24 m-mole/g. Working time is maintained by including sufficient amounts of a retarder composition that delays onset of the vinyl polymerization. Wettability is improved by including a surfactant resulting in a surface contact angle with water at three minutes of less than 50 DEG . The surfactant chosen has an HLB of 8-11, such that the wetting contact angle is achieved within less than two minutes and remains wetting throughout the working time of the impression taking, substantially improving impression quality. A low viscosity impression material is provided and includes a base component and a catalyst component. Both components are siloxane-based materials.
Abstract:
The invention provides polymerizable dental, compounds, compositions, including the compounds and products for mixing the compositons and methods of using the compositions. Aryl acid compounds are provided in accordance with the invention. The compositions include at least one polymerizable aryl acid compound, an effective amount of a polymerization initiator, and at least 10 percent by weight of ceramic, metal and/or metal oxide filler particles having a particle size less than 500 microns. The dental products of the invention include a polymerizable composition in an enclosure having at least two chambers separated by a wall adapted to be ruptured prior to or during mixing of the composition. Compositions of the invention are preferred for use in these enclosures. Core build up material including a polymerizable acid containing compound is used to support dental crowns and adhere them to teeth in accordance with the invention.
Abstract:
A laminar package material for packaging of volatile compositions containing solvents with a vapor pressure of from about 90 hPa to about 300 hPa at 20 DEG C, includes a combination of a polyolefin (A), a second polymer (B) serving as a barrier material incompatible with the polyolefin and an alkylcarboxyl-substituted polyolefin serving as a compatibilizer (C).
Abstract:
An ultrasonic dental tooth treatment system including an ultrasonic dental handpiece, a fluid reservoir housing and a power control housing. The reservoir housing is supported by the control housing. The reservoir housing encloses two containers which are connected to the selector valve. The selector valve is connected to a control housing conduit which is connected to the handpiece. The control housing encloses a power control circuit which is connected to the handpiece. In a preferred embodiment of the invention a fluid dispenser includes at least one readily removable reservoir container supported by a reservoir housing having a pivotable cover and a fluid control valve. The cover is pivotable between an open position and a closed position. The valve is closed by the cover when the cover is in its open position.
Abstract:
The invention provides a method of operating a dental scalar system having a vibrating scaling tip by continuously monitoring the amplitude and frequency of vibration of the tip which provides scaling power to a tooth in a patient's mouth. The amplitude and frequency of vibration of the tip is continuously adjusted to maintain a substantially constant scaling power. Preferably, the insert is vibrated at its resonant frequency and the system provides a substantially constant tip motion while the user varies the applied pressure between the tip and the tooth.
Abstract:
A composition useful for removing and cleaning an oral dentition of organic residues that interfere with dental material activity, such as inhibiting curing of silicone based impression material. The composition is useful for cleaning temporary adhesive from a dentition prior to permanently adhering a crown, onlay, inlay or the like thereto and removing contaminating glove residues or the like from a dentition prior to taking of an impression. A method of preparing an impression of a dentition in the oral cavity, for removing inhibitors left by latex gloves that interfere with platinum catalyzed hydrosilation reactions, includes applying the decontaminating composition including surfactants, especially a polyoxyethylene surfactant, hydrogen peroxide and water to the area that is to have its impression taken substantially immediately before applying the impression taking material. The composition is rinsed from the area and, after drying, the taking of the dental impression proceeds free of surface inhibition of curing.
Abstract:
Epoxide-amine dendrimers synthesized by a repetitive and step-wise addition reaction of epoxides comprising functional moieties which are available for conversion into amino groups followed by a reaction of these groups to primary amino moieties. The amino terminated dendrimers are reacted with (2,3-epoxypropoxy) methacrylate, a monoepoxide and/or a monoisocyanate. The methacrylate terminated dendrimers are polymerizable using redox initiators and/or photoinitiators. The resulting dendrimers show a very low volume shrinkage from that of the starting materials, on the order of less than about 5 % by volume.