Abstract: Disclosed herein are a tissue management impression material and a method of application into the sulcus of a patient, whereby the tissue management impression material is a part of the final dental impression made when manufacturing a dental device, such as a crown.

Abstract: Disclosed herein are a tissue management impression material and a method of application into the sulcus of a patient, whereby the tissue management impression material is a part of the final dental impression made when manufacturing a dental device, such as a crown.

Abstract: A corrosion coupon rack includes one or more coupon mounting devices constructed of a coupon holder receiver including a handle recess of a given diameter and an end wall, a connection conduit in communication with the handle recess through an opening in the end wall and axially aligned therewith, and locking means having open and closed positions, the locking means including a cam surface extending into the handle recess when the locking means is in the closed position; and a coupon holder including a handle insertable into the handle recess, the handle having inner and outer ends, a locking recess, and a shaft axially aligned with the handle, the shaft having a proximal end attached to the handle inner end, and a distal end adapted to releasibly attach a corrosion coupon, the shaft extending through the T-connection and into the pipe.

Abstract: Dental cements and abrasives are provided which are polymerizable with visible light. Such adhesives may be applied in thinner films than heretofore possible and demonstrate superior physical properties. Processes employing such materials are disclosed wherein the polymerization of the adhesive is accomplished by transmitting visible light through tooth or other structures to effect the adhesion.

Abstract: Apparatus for purifying, devolatilizing and/or sheeting a thermoplastic material in which a high density, flowable heat exchange material, having a density substantially above the density of the thermoplastic material and which is essentially immiscible therewith, is continuously circulated through a contact zone in a manner to maintain an extended surface area body of the high density heat exchange material in the contact zone, the thermoplastic material is introduced into and withdrawn from the contact zone in a manner to form a continuously flowing layer of the thermoplastic material across the surface of the body of high density heat exchange material. Thermoplastic material may be introduced into the contact vessel as a powder, melted in an intermediate section of the contact vessel, resolidified at the opposite end of the contact vessel and withdrawn as a sheet of thermoplastic material.

Abstract: Dental cements and adhesives are provided which are polymerizable with visible light. Such adhesives may be applied in thinner films than heretofore possible and demonstrate superior physical properties. Processes employing such materials are disclosed wherein the polymerization of the adhesive is accomplished by transmitting visible light through tooth or other structures to effect the adhesion.

Abstract: Novel compositions, especially light curable compositions, are provided which are coherent, but frangible when cured. Preferred compositions comprising a major proportion of inert, preferably inorganic filler material, polymerizable resin and frangibility enhancing material are provided which are light curable. The materials are particularly useful for "temporary" dental fillings and removable endodontic fillings. The cured materials are easily dissected, comminuted and removed as desired after curing without trauma to the filled teeth.

Abstract: The present invention is directed to a method for developing a bond having a shear strength in excess of 1200 psi between dental cements and dental appliances fashioned from glass-ceramic materials. The inventive method consists of contacting the fitting surface of the appliance with an etchant in flowable gel form at a temperature below about 150.degree. F., while protecting the exterior surface of the appliance. Subsequently, a silane solution followed by a dental cement is applied to the etched surface and cured in place.

Abstract: A method and apparatus for purifying, devolatilizing and/or sheeting a thermoplastic material in which a high density, flowable heat exchange material, having a density substantially above the density of the thermoplastic material and which is essentially immiscible therewith, is continuously circulated through a contact zone in a manner to maintain an extended surface area body of the high density heat exchange material in the contact zone, the thermoplastic material is introduced into and withdrawn from the contact zone in a manner to form a continuously flowing layer of the thermoplastic material across the surface of the body of high density heat exchange material. Thermoplastic material may be introduced into the contact vessel as a powder, melted in an intermediate section of the contact vessel, resolidified at the opposite end of the contact vessel and withdrawn as a sheet of thermoplastic material.

Abstract: Novel processes for the restoration of teeth particularly posterior teeth, wherein the use of a matrix band is required, are provided employing one component, packable, actinic light curable, resin-based restorative compositions. Such methods are now capable, for the time, of employing resin-based restoratives in the posterior restoration of teeth wherein the packability of the restorative composition enable the deformation of a matrix to allow substantial restoration of the original conformation of the tooth. Packable one component actinic light curable resin-based restorative compositions are provided.

Abstract: A railcar running gear or a wheel unit for railcars with at least two essentially parallel axles with two wheels on each axle is provided for, of which the front two wheels have a roll surface touching the rail that is slightly tapered so that the smaller diameter of the roll surface is located at the outside and the larger diameter of the roll surface is located at the inside of the wheel, and the rear two wheels have a roll surface touching the rail that is slightly tapered so that the smaller diameter of the roll surface is located at the inside and the larger diameter of the roll surface is located at the outside of the wheel.

Abstract: A method is provided for stabilizing an open graded course of asphalt-concrete against lateral displacement under a moving load. The method which is suitable for use during construction of the asphalt-concrete course or on courses already completed is carried out by causing particulate matter of suitable size to be passed into the interstices of the asphalt-concrete course and then consolidating this particulate matter within the interstices using an emulsion of a thermoplastic elastomer, a resinous material and a polar solvent which upon curing forms a stabilized course.

Abstract: Asphalt surface roads are subjected to an oxidizing treatment, e.g., flame treatment, to improve resistance thereof to skidding on the surface thereof.

Abstract: Dental cements and abrasives are provided which are polymerizable with visible light. Such adhesives. may be applied in thinner films than heretofore possible and demonstrate superior physical properties. Processes employing such materials are disclosed wherein the polymerizatioa of the adhesive is accomplished by transmmitting visible light through tooth or other structures to effect the sdhesion.