Dentsply Research & Development Corp.

Wu-Lan Wang

Emery W Dougherty

Disclosed in the present application is a method of curing a dental impression material by passing actinic light through a tray while the tray is in contact with the impression making composition, a new dental impression composition that is polymerizable by having an initiator activated by actinic light within the visible light range of 360 to 600 nanometers, a new composition of matter that is a compound having at least two terminal acrylate unsaturations and an organosilicone containing backbone and a new method of forming dental prosthetics by directly forming against the soft tissue of the oral cavity and then setting with visible light curing.

Dental image formation and organosiloxane

Dental impression method with photocuring of impression material in

Biocompatible, shelf-stable, polymerizable compositions which are especially useful for applications requiring direct contact with living pulpal tissue, bone or dentin, and methods for using the compositions are disclosed. The compositions are non-toxic, both before and after in situ polymerization, and include at least one polymerizable monomer or prepolymer which polymerized by a mechanism other than chelation or saponification. In one aspect, the compositions comprise at least one non-toxic polymerizable ethylenically unsaturated monomer or prepolymer and a catalytically effective amount of a free radical initiator system, and preferably, from about 5 to about 70% by weight of calcium hydroxide or calcium oxide.

Method of treating living pulp tissue

A dental impression tray and method of using it to form in a light-polymerizable impression material an impression of a portion of dental anatomy in an oral cavity, the tray being formed of transparent substantially rigid material, preferably clear plastic, and molded into a channel-like shape defined by walls capable of having visible actinic light applied to the walls of the tray for transmission along and through the walls, and substantially all the exterior surfaces of the walls having light reflecting metal foil or the equivalent applied thereto for the dual purpose of preventing unintentional light exposure to material in the tray and subsequently providing a light reflecting surface operable to reflect light into the impression material. The tray also may be loaded with polymerizable impression material and have a cover sheet sealed to the rim of the tray and thereby become a package conveniently ready for use simply by peeling the cover sheet from the rim of the tray to expose the impression material for immediate impression onto dental anatomy of which a model is to be made.

Growing community of inventors

Milford, DE, United States of America

Wu-Lan Wang