Abstract: The present invention discloses an intraoral semi-custom disclusion device for use on at least one anterior upper incisor, the kit comprises a channel, adapted to removably receive within the channel the at least one upper anterior incisor. The channel has a front wall and a back wall with each generally parallel to a common plane and a floor connecting the front and back walls having a lower outer surface in a plane that is either tiltable, or tilted, to the common plane. The device also includes a curable polymeric resin for filling at least a portion of the channel. The polymeric resin is moldable around the at least one anterior upper incisor when the channel is positioned for use and is curable to a soft resilient molded shape of the at least one anterior upper incisor.

Abstract: A flavored and medicated therapeutic mouthpiece for causing a mouth to salivate and for dispensing medicine to heal wounds and sores within the mouth. The flavored and medicated therapeutic mouthpiece includes a pliable U-shaped member insertable into a mouth of a user. A first flavored coating is disposed on the U-shaped member. A second flavored coating or a layer of medicine may also be applied to the U-shaped member. The U-shaped member may be hollow and have a cold temperature storage medium stored therein.

Abstract: A dental impression tray having a handle and a mouthpiece is disclosed herein. The mouthpiece contains an upper portion and a lower portion defined as a means for laterally displacing excess impression material. The upper portion of the mouthpiece, which holds the impression material, is defined by outer and inner walls having arcuate shapes, a base attached to and extending the length of the bottom of the outer and inner walls, a plurality of elongated vent holes in the base, and a serpentine occlusal stop ridge extending from the top of the base. Therein the outer edge of the inner wall of the upper portion of the tray are a plurality of holes which force excess impression material to extrude to the means for laterally displacing excess impression material. Excess impression material extruded from the holes flow laterally across the horizontal surface and interlock with the excess material extruded from the elongated vent holes thereby securely attaching the impression material to the mouthpiece.

Abstract: Dental impression tray structure having a base and a trough supported by the base, the trough being adapted to carry a settable impression composition in conforming contact with teeth, the trough having a porous surface layer in open communication with the impression composition within the trough.

Abstract: An intraoral administration device having an elongated, substantially plate-like arcuate oral screen designed to conform to the teeth and intended to be accommodated in the space between the teeth and the lips. The oral screen includes containers for the agent to be administered intraorally, which containers have provision for allowing the free entrance of saliva into the container and its exit therefrom. An administration system using the administration device and an active agent, such as for example an agent against caries or otitis media is also contemplated.

Abstract: An apparatus and method for fabricating and fitting dentures that employs a Biteblock/Impression Tray and a Preset Teeth Carrying Tray. The Biteblock/Impression Tray is produced for both upper and lower dental arches with a wax biteblock attached to each, and shaped with flanges and a palate on the upper tray to accommodate the taking of impressions. The Preset Teeth Carrying Tray is produced for both upper and lower dental arches with the denture teeth mounted in their anatomical position to a plastic tray using wax that is festooned around the teeth and simulates the gum tissue. Each denture tooth is produced with a retention groove below the gum line and has the glaze removed from the roots prior to being mounted in the wax on the Preset Teeth Carrying Tray. Since the teeth are in their correct anatomical position with wax simulating the gum tissue, the teeth can be easily transferred as a unit to a stone model of the patient's dental arch for denture fabrication.

Abstract: The invention has an object to permit easy and rapid manufacture of an occlusal plane raising plate which does not contain a fluid therein and does not impair relative movement of the upper and lower jaws, and provides a kit for manufacturing an occlusal plane raising plate comprising an occlusal plane raising plate manufacturing member body composed of a soft and thin lower member, an upper member inferior in softness to the lower member, and a path capable of housing a hardenable material, and hardenable materials to achieve the above object.

Abstract: A device useful for delivering a predetermined treatment agent using a non-adhesive carrier for controlled regional release where the relationship between pore size, molecular weight, concentration and the like are predetermined to achieve specific predetermined time and quantity of release. The device includes a mouthguard shaped for extended contact with a substantial portion of the users mouth, such as all of the teeth and gums, for example, so as to provide treatment to a major region of the mouth as opposed to specific topical points of treatment. The mouthguard is held in position by properly fitting it to the patient, such as by softening and molding in situ. The portion of the mouthguard that is in direct contact with the region of treatment is formed from a polymeric material having a network of porous cavities that are sized to incorporate the treatment agent and release that agent over a predetermined period of time.

Abstract: A dental impression tray having a handle and a mouthpiece is disclosed herein. The mouthpiece contains an upper portion and a lower portion defined as a means for laterally displacing excess impression material. The upper portion of the mouthpiece, which holds the impression material, is defined by outer and inner walls having arcuate shapes, a base attached to and extending the length of the bottom of the outer and inner walls, a plurality of elongated vent holes in the base, and a serpentine occlusal stop ridge extending from the top of the base. Therein the outer edge of the inner wall of the upper portion of the tray are a plurality of holes which force excess impression material to extrude to the means for laterally displacing excess impression material. Excess impression material extruded from the holes flow laterally across the horizontal surface and interlock with the excess material extruded from the elongated vent holes thereby securely attaching the impression material to the mouthpiece.

Abstract: An impression tray for fixed dental prosthesis has a first and second opposed recesses containing the material to be impressed, through which both the impressions of the upper and lower side of the dental arcade of a patient can be taken simultaneously.

Abstract: A single tooth handheld dental impression duplicating device and a method of using the device are disclosed. The device is designed to reproduce the occlusal surface anatomy of a particular tooth by making an impression, and after the setting of such material and having obtained the print of the tooth, use the device as a finishing mold for the restorative material. The device comprises a main body (1) with a holder or handle (8) attached to it. Within the main body there is a well defined cavity (3) proximal to the tooth, where the impression material (4) is located. Once the impression material has been softened, it is placed against the occlusal surface of a single tooth and `deformed` against the tooth surface when finger pressure is applied, thereby creating an impression of the tooth surface configuration. A second cavity (2) opposite to the previously mentioned proximal cavity (3), allows the placement of a fibre optic cable for the emission of light when curing materials are used.

Abstract: The present invention discloses high viscosity sustained release dental compositions, such as tooth bleaching or fluoride compositions, for treating tooth surfaces. For maximum results, an improved dental tray having reservoirs for holding the dental composition adjacent the desired tooth surfaces is preferably used in combination with the sustained release dental composition. The sustained release dental compositions include a high carboxypolymethylene concentration which results in very high viscosity. The high level of carboxypolymethylene makes dilution of the dental compositions from saliva difficult and time consuming so that the compositions stay within the tray reservoirs, thereby providing sustained release. The concentrated carboxypolymethylene adds a unique tackiness to the dental composition which helps retain and seal the soft tray material against the patient's teeth.

Abstract: A caddy is provided for either permanent or removable attachment to a dental articulator for retaining one or more bite registrations at or near the dental articulator.

Abstract: A dental impression tray has a receptacle for receiving a quantity of dental impression material, and the receptacle is coated with an adhesive for enhancing the bond between the impression material and the tray. The adhesive is applied to the tray body at least sixteen hours before the impression material is placed in the receptacle. Advance coating of the adhesive onto the tray body provides a higher bond strength between the impression material and the tray than would otherwise be observed. Precoating of the tray by the manufacturer represents a time savings for the dental practitioner and also reduces the amount of volatilized solvent emitted from the adhesive that might otherwise be emitted in the dental office.

Abstract: A dual dental tray assembly is provided which includes a pliable resilient outer dental tray using a pre-formed thin inner tray of thermoplastic material that nests inside the pliable outer tray. The two are heated to between 145.degree.-160.degree. F. During this time the inner tray is more formable, allowing for the inner tray to be accurately formed over the patient's teeth. The outer tray also prolongs the time during which the inner tray is moldable. The outer tray also operates as a seal with the gums to create a better vacuum created by the patient's sucking. Thus, the inner tray, once formed and cooled, becomes hard and flexible again and provides a thin hard dental tray as accurate as dental trays produced by dentists in their labs on models. The thinner, hard dental tray can then be used for dental treatments including bleaching, fluoride applications, and other dental operations, including provisional crowns and other dental work. The outer tray is usable for fluoride gel treatments.

Abstract: A single use impression tray assembly has a dental impression tray (12, 100) with a separate but readily attachable handle (14, 114). Impression tray (12, 100) includes a handle securing element to selectively interlock handle (14, 114) to impression tray (12, 100). Additionally, impression tray (12, 100) includes a plurality of impression material retaining structure (68) for retaining impression material within the impression tray.

Abstract: A dental impression tray contoured to fit over at least a portion of a patient's dentition is provided. The dental impression tray includes a wall portion and an elongate rib adapted to extend along the wall portion. The elongate rib and wall define a channel sufficiently elongate with respect to the portion of the patient's dentition to interfit with an impression material during an impression of the portion of the patient's dentition to hold the impression material more securely in the tray.

Abstract: A new type of dental impression device is disclosed, which aides in producing more accurate impressions. The device is a spring loaded device which holds a panel flat against the teeth. This panel is custom fabricated to fit against the teeth just below the height of contour. It temporarily yields a flattened surface, masking all of the irregular surfaces beneath it. The dental impression material may then be removed without the distortion caused by the associated stretching over the curves of the teeth.

Abstract: A dental impression technique is disclosed which actually includes the presents of air pockets within the dental impression material. The technique describes including small sponges into the tray impression material while mixing base and catalyst. Air pockets are thus created evenly within the impression material. Air pockets may also exist by mixing air into material, small premanufactured spheres, or by chemical reaction.

Abstract: A new Dental Impression Tray for making a dental impression of a lingual surface or a buccal surface of a tooth. The inventive device includes a tray portion and a handle portion extending from the tray portion, wherein the tray portion is perpendicularly removable from the lingual surface or the buccal surface of the tooth. The tray portion is adapted to retain a dental impression compound for use in making the dental impression. The tray portion comprises a first wall, and a second wall joined perpendicular to the first wall whereby the first wall and the second wall form a trough at an intersection thereof for retaining the dental impression compound.

Abstract: A dental impression tray has wall portions defining at least one channel for receiving a quantity of photocurable dental impression material. At least one of the wall portions is located next to the chamber and is made of a material that transmits electromagnetic actinic radiation. The tray also includes a chamber for receiving a chemiluminescent composition. Light emitted from the chemiluminescent composition induces the curing of the impression material in a uniform manner along the length of the channel.

Abstract: A dental impression tray includes at least one array of solid state light emitters for curing photocurable impression material received in a channel of the tray. The tray includes a body presenting the channel, and a housing that is detachably connected to the body. The tray preferably includes a battery that extends along a buccolabial side of the tray body and as a result is received in the patient's oral cavity when an impression is taken.

Abstract: A moldable material formed over teeth with a second flowable material containing an astringent placed into the impression of the teeth in the moldable material providing retraction and hemostasis at the gum line. A moldable material, preferably a silicone, may contain an astringent such as aluminum ammonium sulfate is made into a mold of teeth. The impression formed in the mold of the teeth is filled with a less viscous or initially flowable material also containing an astringent. The mold with the flowable material is placed over the teeth. The initially flowable material preferably sets into a solid. The flowable material may be made of a condensation silicone having a base and catalyst. The mold helps to apply pressure to the flowable material which is transmitted to the gum tissue resulting in retraction and hemostasis.

Abstract: The modulus of elasticity and yield strength of a rigid core rod are set within predetermined limits as to limit the elastic deformation and prevent plastic deformation of a dental tray during multiple impression taking, bite registration and subsequent handling. The tray is formed with a frame which provides a positive recovery force when it is flexed. The cross section of the core rod may be optimized to further limit deflection in a predetermined plane. Various preferred materials including nonwoven spun-bonded filaments are selected for supporting impression material on the tray while minimizing the likelihood of obstructing a patient's teeth during full occlusion.

Abstract: An improved tray system and articulator for use with a replication of a dental patient's teeth taken by a conventional dental impression in the creation of a dental model of the patient's mouth. A first tray and a second tray are provided, each tray having a substantially planar surface upon which a substrate layer of a stone material is applied. An insert is detachably secured to each of the trays and includes an upper keyed portion about which the stone layer bonds. An upper conventional dental impression is secured to the substrate stone layer of the first dental tray and a lower dental impression is secured to the substrate layer of the second dental tray. A reusable articulator includes first and second hinged members which secure to the first and second trays and mount the trays so as to position the teeth replications.

Abstract: A dual dental tray assembly is provided which includes a pliable resilient outer dental tray using a pre-formed thin inner tray of thermoplastic material that nests inside the pliable outer tray. The two are heated to between 145.degree.-160.degree. F. During this time the inner tray is more formable, allowing for the inner tray to be accurately formed over the patient's teeth. The outer tray also prolongs the time during which the inner tray is moldable. The outer tray also operates as a seal with the gums to create a better vacuum created by the patient's sucking. Thus, the inner tray, once formed and cooled, becomes hard and flexible again and provides a thin hard dental tray as accurate as dental trays produced by dentists in their labs on models. The thinner, hard dental tray can then be used for dental treatments including bleaching, fluoride applications, and other dental operations, including provisional crowns and other dental work. The outer tray is usable for fluoride gel treatments.

Abstract: An improved dental impression tray fabricated with vertical rests that anchor onto predetermined areas of the mouth to allow stabilization of tray while impression material sets. This disclosure also provides for a venting of selected teeth to the outside air to eliminate damaging force of vacuum on freshly cured material when tray is lifted. More specifically, the practitioner fills the impression tray with moldable material and seats fully into the mouth. Venting pins are immediately fitted through impression tray and impression material and seated onto the occlusal surfaces of the teeth. After the impression material has set, venting pins are removed. The impression tray is then lifted vertically and removed.

Abstract: A dental arch bite registration device in the form of a thin disk having a plan shape corresponding to that portion of opposing dental arches whose registration is to be taken. The disk has an outer perimeter frame of polymeric material for peripherally bounding, as viewed in plan, an open space where that portion of opposing dental arches whose registration is to be taken will register. Polymeric bite registration material is joined with, and supported by, the outer perimeter frame, extending across and filling the open space, so that when the device is used to take a bite registration, that portion of opposing dental arches whose registration is being taken will create a bite registration in only the bite registration material, and not in the outer perimeter frame.

Abstract: A dual dental tray assembly is provided which includes a pliable resilient outer dental tray using a pre-formed thin inner tray of thermoplastic material that nests inside the pliable outer tray. The two are heated to between 145.degree.-160.degree. F. During this time the inner tray is more formable, allowing for the inner tray to be accurately formed over the patient's teeth. The outer tray also prolongs the time during which the inner tray is moldable. The outer tray also operates as a seal with the gums to create a better vacuum created by the patient's sucking. Thus, the inner tray, once formed and cooled, becomes hard and flexible again and provides a thin hard dental tray as accurate as dental trays produced by dentists in their labs on models. The thinner, hard dental tray can then be used for dental treatments including bleaching, fluoride applications, and other dental operations, including provisional crowns and other dental work. The outer tray is usable for fluoride gel treatments.

Abstract: A dental impression paper tray comprising a material mainly composed of pulp which is compressed molded to a dental impression tray shape having a thickness of 0.5-10 mm. Minute concavities/convexities may be formed at least on the inner surface of the paper dental impression tray. Paraffin wax may be dispersingly included in the tray or coated on the surface of the tray. A handle of the tray may be integrally attached to a dish portion by insertion or adhesion. Since the tray is made of paper and is less expensive, it can be domestically disposed with an incinerator as a disposal tray. Further, the tray having the minute concavities/convexities has an increased holding force to an impression material. The tray to or in which paraffin wax is coated or contained has increased water resistance.

Abstract: A device for obtaining dental impressions to be used in the subsequent fabrication of a prosthesis. The dental impression device permits a more accurate impression by minimizing the interference typically encountered from the patient's segregation of saliva and/or the movement of his tongue. With a cooperating cover member that receives the U-shaped housing a dentist can force the moldable setting material conventionally used to conform to the area of the mouth being worked on. Openings selectively positioned on the upper wall of the housing member permit the injection of moldable material and other activities. A suction conduct is peripherally disposed around the lower edge of the U-shaped housing.

Abstract: The dental impression tray for optional partially toothless jaw and toothless jaw with implants consists of a basic impression tray (1) and of a paired impression tray (2) freely arrangeable and positioned upon it, whereat the tray (1) is executed basically as a grooved horseshoe-shaped profile (3), whose side edges (4) are thickened with the purpose of strengthening, and the paired impression tray (2) is executed as a stiff horseshoe-shaped U-profile, which rests exactly on the outer thick edge (4) of the tray (1) so that between the trays (1) and (2) a space (6) is formed, which can accept a tooth with the impression material, and the thin-walled profile (3) of the tray (1) is foreseen for making holes (7) by handy dental tools at optional places in accordance with the state of the treated jaw.

Abstract: A dental impression tray is disclosed herein having a pair of spaced-apart arcuate walls having a common radial center and wherein the opposing wall surfaces define a work area for holding a quantity of dental impression material. A thin plastic embedded fibrous membrane or sheet or a non-woven fabric material extends across the work area having its opposite edges attached to the walls and separating the walls into upper and lower wall sections. One end of the walls may or may not support a wire element while the opposite walls' ends are open. The opposing wall surfaces carry a plurality of alternate vertical grooves and rod-like projections disposed in parallel and split horizontally by the fibrous membrane. The root of each projection includes a recessed portion in order to engage with the impression material and a handle attached to an outer wall of the pair outwardly extends anteriorly therefrom. A tongue retractor structure may be integrated on an inner wall of the pair.

Abstract: A dental impression composition, dental impression pre-form and/or pre-mold and method for taking a dental impression that includes a pre-form made of an ethylene vinyl acetate copolymer mixed with a second polymer selected from vinyl acetate, a second ethylene vinyl acetate and a vinyl acetate vinyl alcohol ester. The pre-form softens at a temperature of about 120.degree. F. to 170.degree. F. The composition and method may also include a second pre-form made of a thin separator film sheet of a high molecular weight polycaprolactone, sandwiched between two ethylene vinyl acetate pre-forms.

Abstract: A dental impression tray includes a self-contained light source for curing photocurable impression material. The light source is a solid state light emitter such as a light emitting diode. In one embodiment, an array of light emitting diodes is arranged along a channel of the tray. In another embodiment, a light dispersive material distributes light into the tray channel from a bank of one or more emitters.

Abstract: A dental impression tray having a rough textured surface which provides a multiplicity of pits made up of valleys and peaks, holes that don't penetrate through the tray, cavities, craters, crevices, ledges and/or undercuts which retain and/or stabilize the impression material. The rough textured surface of the handle provides a non-slip surface for a gloved hand.

Abstract: 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.

Abstract: An impression tray is provided with a dispersal member which receives impression material for delivery into the impression tray. A one-step method includes the provision of barriers on the impression tray to confine light bodied impression material in the tray during the delivery of the material into the tray and the taking of the impression. A two-step method entails the direct deposit of heavy bodied impression material into the impression tray and the taking of a preliminary impression. A jig for punching the preliminary impression confines the impression tray during the formation of passageways for later injected lighter impression material injected into the dispersal member and then to the impression tray. An air cylinder is controlled by an operator for selective discharge of impression material from tubular containers and into the dispersal member. A unitary impression tray is disclosed with a dispersion channel for directing impression material into place.

Abstract: Multi-laminar bite registration devices are fabricated from ethylene vinyl acetate. Injection molding is used to bond one lamina to another without the use of separate adhesive. The lamina have different durometers. In one embodiment, two relatively low durometer lamina are injection molded onto opposite surfaces of a relatively higher durometer lamina. In another, a relatively lower durometer lamina is injection molded onto a relatively higher durometer lamina.

Abstract: An impression tray for making impressions of the upper and lower teeth, the impression tray includes a mouthpiece and a handle. Sectional and quadrant impressions may also be made using this impression tray. The mouthpiece including an outer wall, inner wall and a base connected between the outer and inner walls at a bottom thereof. The handle is connected to an outer side of the outer wall at a mid-section thereof. The outer and inner walls each have vertical slits spaced along their length. The vertical slits each have a shoulder within the slit providing an interlock for the impression material displaced through the slits. The base includes a number of ribs on its top, each rib extending between the outer and inner walls and in an alternating arrangement with the slits on the outer and inner walls. Between each adjacent pair of ribs are two holes extending through the base. The base is also attached, on its bottom, to a platform structure.

Abstract: An apparatus for protecting and treating teeth including a mouthpiece and storage container is disclosed. The mouthpiece has an arcuate or U-shaped body and is molded from a thin layer of soft, absorbent, and pliable elastomeric material. A continuous U-shaped channel is dimensioned for receiving the upper teeth of a user and is formed in the body in a location adjacent its periphery for a length coextensive with the U-shaped periphery of the body. The body has an integral center portion which arches upwardly from the U-shaped channel to conform to the similarly upwardly arched or convex form of the roof of the mouth or palate of the mouthpiece user. The U-shaped channel may be enclosed and filled with encapsulated setting materials to form a permanent, form-fitting dental impression for the upper teeth of the user. A medicated pad may be adhesively positioned over the enclosed channel to relieve sore gums and teeth.

Abstract: A light-curing apparatus for curing polymerizable material in the mouth is provided. In one embodiment the apparatus comprises a wand which is substantially the same size as a quadrant or a full dental arch; in a second embodiment, the apparatus is in the shape of a dental tray and is adapted to fit over the outside of a dental tray; and in a third embodiment the light source comprises a portion (substantially the frame) of a double arch impression tray, and has a slide mechanism by which the mesh of a double arch impression tray can be removed from the light source so the light source can be reused. The invention also comprises a method for curing a dental material in the mouth using the apparatus of the invention.

Abstract: A dental impression tray is disclosed herein having a pair of spaced-apart arcuate walls having a common radial center and wherein the opposing wall surfaces define a work area for holding a quantity of dental impression material. A thin plastic embedded fibrous membrane or sheet extends across the work area having its opposite edges attached to the walls and separating the walls into upper and lower wall sections. One end of the walls may or may not support a wire element while the opposite walls' ends are open. The opposing wall surfaces carry a plurality of alternate vertical grooves and rod-like projections disposed in parallel and split horizontally by the fibrous membrane. The root of each projection includes a recessed portion in order to engage with the impression material and a handle attached to an outer wall of the pair outwardly extends anteriorly therefrom. A tongue suppressor structure may be integrated on an inner wall of the pair.

Abstract: A method for making a custom impression tray is disclosed. The method includes the steps of heating a thermosetting material, such as polycaprolactone until the material becomes pliable and then molding the material in the area of the mouth for which a custom impression tray is desired. The material, upon cooling, sets thus forming a custom impression tray which is then removed from the mouth.

Abstract: A gel tray for holding a medicament to be applied to the teeth and gums of a patient includes a handle and an opposing buckle. In one embodiment, the buckle includes a tongue portion and a retainer strip surrounding the tongue portion so as to define a narrow space between the tongue portion and the retainer strip, the narrow strip having a width less than the thickness of the handle. The handle has a tongue reception groove extending transverse to its length at a position such that the tongue reception groove is engaged by the tongue when the tray is folded. In another embodiment, slotted tabs are interfitted when the tray is folded. The tray may therefore be securely maintained in the folded state. The tray can be combined with or preloaded with a treatment agent such as a gel comprising a pharmaceutically effective amount of at least one agent for treating teeth or gums dispersed in a gel medium consisting essentially of water and an amount of a water dispersible gelling agent sufficient to form a gel.

Abstract: A bead of a high-viscosity impression material is applied along the entire edge of an imperforate tray forming a U-shaped recess and an endless edge extending all around the recess and the tray is fitted, before the material cures, over a patient's dental arch with the bead on the edge engaging and deformed by the patient's mobile mucosa outward of the linear action boundary. The deformed bead of high-viscosity material is cured to form the tray and the cured bead of high-viscosity material into a custom tray which is then filled with a body of a low-viscosity impression material and again pressed over the patient's dental arch to press the cured bead on the tray edge into tight engagement against the mobile mucosa outward of the linear action boundary to form between the tray and the dental arch a substantially closed and generally constant-section chamber hydraulically confining the low-viscosity impression material.

Abstract: 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.

Abstract: A self contained dental tray for taking impressions of teeth and associated soft tissues which requires no prevous application of adhesive to allow the teeth and impression to separate. In all of the embodiments the room temperature vulcanizable rubber and its hardener are included in the tray without the danger of premature hardening during shipping and storage.

Abstract: A mold for taking impressions of the teeth including a substantially U-shaped bottom plate having a bottom surface which is bordered by an inner defining wall and an outer defining wall and a cover member including a perforated bottom. The cover member preferably is received within the bottom plate and separated from a bottom thereof by a spacer including an upwardly opening channel that registers with the perforations. Formed between the bottom part of the cover member and the bottom surface of the bottom plate are channels which function to conduct coolant through the mold. The mold is preferably made from a plastic material.

Abstract: A dental impression tray is provided with mold compound retention means comprising a multilayer sheet having a thin, central layer of a plastic film, a layer of a selected adhesive applied on each surface of the film respectively, and a peel-away disposable foil cover on each layer of adhesive.