72 results about "Permlastic" patented technology

A method and a device for effecting the cordless retraction of the gingival sulcus tissue prior to the taking of an impression of a tooth for making a crown or bridge which is attained by controlling any bleeding in the gingival sulcus area, and utilizing a dental dam preferably formed of a sponge or foam like material to contain an astringent fortified silicone impression material embedded about the prepared tooth, and using the patient's biting force to apply the necessary pressure onto the dam until the silicone impression material sets and adheres to the dam to enhance easy removal of the set impression material from the tooth. The dam is formed to accommodate either the posterior teeth or the anterior teeth.

To provide a dental impression material composition having high hydrophilicity comparable to that of polyether rubber-made impression materials, being superior in recovery from deformation caused by removal out of an oral cavity, which are similar to silicone rubber-made impression materials, the dental impression material composition being superior in dimensional precision, and good in storage stability. The dental impression material composition includes (A) 100 parts by weight of the sum of (1) an organopolysiloxane containing at least two aliphatic unsaturated hydrocarbons in one molecule and (2) a polyether containing at least one aliphatic unsaturated hydrocarbon in one molecule, in a weight ratio of (1) to (2) of 1:0.01˜1:5, having (B) 0.1˜100 parts by weight of an organohydrogenpolysiloxane containing at least three hydrogen atoms directly bonded to a silicon atom in one molecule, (C) 10˜500 ppm, based on the sum of (A) and (B), of a silicone-soluble platinum compound, (D) 10˜800 parts by weight of an inorganic filler, and (E) 0.5˜5 parts by weight of a nonionic surfactant and / or a polyether-modified silicone oil, compounded therewith.

An interocclusal appliance is formed from a single polymer material composition as one unitary piece or from multiple polymer material compositions as a two-piece preform. The two-piece preform includes a base material and an impression material that has a softening point lower than the base material. Teeth are received into the heat-softened impression material, so as to contour the impression material. A portion of the impression material also may contour to a portion of the user's palate. In certain embodiments, substantially no polymeric material contacts the front surfaces of the front teeth, leading to greater comfort and better air flow between front teeth. In still another embodiment, the appliance fits over front teeth only and no polymeric material contacts the maxillary molars.

A dental impression tray includes a body having a channel for receiving a quantity of curable thermoset dental impression material and an electrically resistive heating element provided within the channel, in order to use heat to accelerate the curing of the dental impression material. In some embodiments, the tray includes a liner positioned on the heating element in the channel, where the liner has low thermal conductivity. A system for forming a dental impression includes a quantity of thermoset dental impression material, and the tray. A method for using the tray includes the step of turning on the heating element after the tray is positioned within a patient's mouth, to accelerate the curing of the dental impression material.

A dental tray having a body, at least two finger rest beams and a handle. The body has a predetermined shape and a plurality of body openings. The predetermined shape of the body accommodates the anatomical shape of the patient's mouth and receives the entire jaw and gingiva areas. The plurality of body openings positioned in the body to allow the impression materials to vent through the body openings to obtain the impression and to retain the impression materials onto the body. The handle is received on the body and has a predetermined configuration to facilitate ease of use and elimination of lip pressure. Each finger rest beams are received longitudinally on the bottom of the body. The combination of the handle and each finger rest beams are ergonomically designed to allow optimal stabilization pressure be exerted by the operator to the dental tray and impression material.

A method is disclosed for forming an accurate stone cast from a dental hydrocolloid impression, used for the purpose of prosthetic fabrication, such as dental prostheses. The dental stone catalyst, calcium sulfate dihydrate, is engaged onto the internal surface of set hydrocolloid impression. This catalyst, placed in the area between impression material and wet, mixed stone, will act to hasten the initial setting of dental stone that is in closest proximity to the impression. The result is a stratified set of the stone. Setting of the wet, mixed dental stone occurs first at the impression / stone interface. The setting radiates outwardly, away from the impression / stone interface. The mixed stone better resists distortion upon setting and the resultant set stone cast is more accurate.

A method and component devices for producing edentulous dentures. The method includes obtaining a cast impression of a jaw, any teeth and gingiva area with a first set of dental trays including selecting a properly sized upper dental tray and a properly sized lower dental tray, applying impression material in each said tray and placing each said dental impression tray with said impression material in said oral cavity in order to deform uncured impression material. A second set of dental trays is utilized including a lower dental tray having a contact plate with an upwardly extending shoulder surrounding a tapered opening, a ball nut retained in the tapered opening, and a post adjustably secured to the ball nut. A striking plate is attached to a second upper dental tray in order to accurately obtain an established occlusal vertical and centric relation positions. A third upper dental tray with a wax impression is inserted for esthetic blue printing to establish the shape of the patient's upper lip and mouth. A third lower dental tray with wax impression material is utilized to determine functional position including tongue, cheek and lip positioning.

A pasty dental alginate impression material composition having features that fluidity of a mixture is changeable by changing mixing ratio of both pastes, sufficient working time can be kept, and liquid separation in abase material paste does not occur during storage, comprises the base material paste composed mainly of 1-20 wt. % alginate and water, and a setting material paste composed mainly of 10-60 wt. % calcium sulfate and a liquid component unreactive with the calcium sulfate, wherein the base material paste does not contain a filler substantially, but contains 0.01-5 wt. % carbonate of sodium or potassium as a retarder and 0.01-15 wt. % one or more polysaccharides such as carrageenan, pullulan, curdlan, xanthan gum, pectin, konjak glucomannan, and locust bean gum, and the setting material paste contain 0.01-10 wt. % phosphate of sodium or potassium as a retarder, and 0.5-30 wt. % polybutene.

The invention relates to a curable dental composition comprising a) a curable organopolysiloxane polymer, b) a crosslinker compound capable of crosslinking said organopolysiloxane polymer, c) a catalyst capable of catalyzing a crosslinking reaction of component (A) and component (B), d) a surfactant, e) a F-containing compound, wherein the F-containing compound has the following formula: (G1-L1-O)s-Rfa-O-L2-G2 wherein: G1 and G2 each independently represents a non-ionic endgroup that is free of polyoxyalkylene groups or contains polyoxyalkylene such that the total amount thereof in the F-containing compound is not more than 10% by weight based on the molecular weight of the F-containing compound; L1 and L2 each independently represents an aliphatic hydrocarbon group or a partially or fully fluorinated aliphatic hydrocarbon group; Rfa represents a mono-valent or divalent partially or fully fluorinated aliphatic group or a partially or fully fluorinated aliphatic group interrupted by one or more oxygen atoms; with the proviso that at least one of the following conditions is fulfilled: (i) at least one of the moieties L1-G1 and L2-G2 is partially or fully fluorinated or (ii) Rf is a partially or fully fluorinated aliphatic group interrupted by one or more oxygen atoms. The invention also relates to a kit of parts and a method of producing a dental composition as well as the use of the dental composition for the preparation of or as impression material or for the preparation of crowns and bridges.

Single-use cartridges for the storing and dispensing of dental two-component impression materials have a closable external chamber with a cylinder-shaped external wall, a cylindrical closable internal chamber that is arranged coaxially or eccentric therein, a mixing element including housing and mobile mixer that is to be mounted separately or connected firmly to the external chamber at its inlet end. Either the internal cylindrical chamber is arranged such that it can be rotated and forms the drive shaft for the mobile mixer part of the mixing element, or the drive shaft extends parallel to the central axis through the internal cylindrical chamber or forms the central axis. The content of the chambers can be dispensed by means of conveying means whose axial thrust motions can be controlled independent of each other.

Two-part dental impression material curable by a metathesis reaction comprising a base paste with first and second resin components each containing at least two cycloolefin groups per molecule curable by a metathesis reaction with a metathesis catalyst. The first resin includes a urethane polyether or polyester carboxylate backbone terminated with the cycloolefin groups and the second resin includes an alkoxy-siloxane polyether or polyester carboxylate backbone terminated with the cycloolefin groups. The metathesis catalyst can be a ruthenium carbene complex catalyst.

The present invention is a method of making a dental impression, having the first step of providing an impression tray filled with a first high viscosity impression material. The second step is to take a first impression by inserting the tray into the patient's mouth over a prepared tooth for the patient to bite and let cure. Thirdly, the tray is removed and a second low viscosity impression material is applied over the prepared tooth. The tray is then reinserted into the mouth over the prepared tooth of the patient in order to take a second impression of the prepared tooth, allowing the hydraulic pressure created by the second impression material to urge the sulcus away from the tooth margin. At this point, the tray is removed from the patient's mouth.

An impression tray set for edentulous jaw, including a pair of a maxillary impression tray and a mandibular impression tray for use in taking an intraoral impression of an patient including an edentulous patient, and capable of simultaneously recording bite position and height when taking the impression, is provided.An impression tray set for edentulous jaw is formed by a maxillary impression tray 1 and a mandibular impression tray 2 respectively including a tray main body 4 having a U-shaped groove on which an impression material is to be applied on a front surface side thereof, an engaging part formed on a back surface of the U-shaped groove in a position corresponding to an alveolar ridge of front teeth, and a handle part 6 that is detachably connected to the engaging part, and each of the maxillary impression tray 1 and the mandibular impression tray 2 includes projecting parts 7 being provided on the back surface, at left and right portions of the U-shaped groove in a position corresponding to an alveolar ridge from a first molar part to a premolar part, the projecting parts 7 being used for determining bite position and height in a state in which at least a part of flat top surfaces 7a of the projecting parts 7 contact each other when taking an impression.

Disclosed is an impression tray (1) with a concave tray body (2) for taking an impression of at least one jaw part, in which at least one implant body (12) is situated, which body has a receiving aperture into which an impression post (11) may be inserted, it being possible to fill the impression tray (1) with a free-flowing hardenable impression material (10) to produce a mold for a model of the jaw part, which when used reduces the time spent in the dentist's chair, increases the precision of an implant model and finally reduces the material and labor costs in that, at least in one portion, the tray body (2) has a wall (6, 6′) which can be penetrated by an impression post (11) inserted into the implant body (12) if the impression tray (1) is placed onto the jaw part.

A dental impression tray includes; a U shaped base, which includes a U shaped planar impression table, an outer wall and an inner wall, wherein the impression table extends between the inner wall along an inner periphery and the outer wall along an outer periphery, wherein the inner and outer walls extend upwardly from the base. The impression table together with the inner and outer walls thereby define a U shaped bite channel configured for receiving therein impression material and a set of teeth, thereby operably taking impressions of the teeth. The impression table includes numerous planar knock-out panels arranged in side by side fashion along the center line, the knock-out panels are configured to be selectively removed from the impression table thereby selectively providing an opening through the impression table. Each knock out panel is separated from the adjacent knock out panel by a panel gap at an open side wherein the gap extends transversely to the center line and between the inner and outer wall.

Device for taking an impression of a subject's ear minimizes risk of damage on the eardrum when the impression is made. The device comprises a nozzle having a first essentially tubular part that has a centre axis and a side wall. The first tubular part has also a first end intended to be inserted into a subject's ear, a first opening for the outlet of impression material, and a second end connected to a supply member for impression material to the tubular part.The first opening has a centre axis that is essentially perpendicular to the centre axis of the first tubular part at the point where the two centre axes intersect each other, alternatively has a direction, as seen from the centre axis of the first tubular part through the side wall, from said first end. The first opening is preferably arranged in the side wall of the tubular part.

Example embodiments of the present invention include hot melt dental adhesive materials that can create a reversible bond. In addition, example embodiments of the present invention include hot melt dental impression materials that can be used to accurately and efficiently obtain a dental impression. Moreover, example embodiments of the invention include devices and methods for use with the hot melt dental adhesive materials and the hot melt dental impression materials disclosed herein. The hot melt dental adhesive materials and the hot melt dental impression materials can provide dental professionals with dental materials that are more effective, efficient, and easier to use when compared to conventional dental adhesive materials and conventional dental impression materials.

The invention provides a molding denture cleaning device. The device comprises a bottom plate, a drive motor, a revolving unit and a scrubbing unit; the drive motor is mounted in the middle of the upper end surface of the bottom plate through a motor seat, an output shaft of the drive motor is connected with the revolving unit through a flange, the revolving unit is mounted in the scrubbing unit in a movable connection manner, and the scrubbing unit is mounted on the upper end surface of the bottom plate and located on the outer side of circumference of the drive motor. The device can solve the following main problems in a cleaning process of a denture: a, an impression material on the surface of the denture is bonded with holes in the denture after being solidified, therefore, the dentureis difficult to clean and the cleaning efficiency is low; and b, the existing dentures subjected to collective cleaning are mostly placed in a cleaning cylinder and stirred, the dentures and the cleaning cylinder or the dentures collide easily in the stirring process, and denture damage is further caused.

The invention discloses an impression material with good hydrophilicity, strength and deformation resistance, and relates to the field of impression materials. The impression material includes an upper jaw protection box and a lower jaw protection box, an upper jaw handle is fixedly connected to the middle of the rear end of the upper jaw protection box, an upper jaw tray is arranged in the middleof the interior of the upper jaw protection box, the upper jaw tray is provided with a plurality of upper jaw impression material holding holes, and a support protrusion is fixedly connected to the front end of the middle of the upper jaw tray. According to the impression material, the upper jaw protection box, an upper jaw front baffle, the lower jaw protection box and a lower jaw front baffle are arranged, so that the impression material can be prevented from overflowing from each periphery of a device to be deformed to affect treatment comfort and treatment quality of a curer, and the impression material has effective protection capability, and improves the treatment quality; the upper jaw tray and a lower jaw tray prepared from a medical silicone material are arranged, the trays havea certain degree of flexibility, so that the impression material is easy to take out from a mouth of the patient; and the upper jaw tray and the lower jaw tray can be operated separately, so that theimpression material is convenient and quick to use.

The invention relates to an accurate mold taking method and device for multi-tooth implantation. The method comprises the following steps: 1) mounting an implantation impression rod in an implant in an oral cavity; 2) performing scanning by using an intraoral scanner to obtain three-dimensional point cloud data; 3) carrying out editing and modeling by utilizing software to obtain a three-dimensional fixed block model, and forming a fixed hole in the surface of the three-dimensional fixed block model; 4) performing editing and modeling by utilizing software to obtain a three-dimensional tray model, wherein the three-dimensional tray model comprises a supporting block; a supporting groove formed in the surface of the supporting block; and a fixed inserting hole formed in the bottom surface of the supporting groove; 5) performing 3D printing on the three-dimensional fixed block model to obtain a fixed block, and performing 3D printing on the three-dimensional tray model to obtain a tray;and 6) sleeving the implantation impression rod with the fixed block through the fixing hole, injecting an impression material into the supporting groove, coating the fixed block with the supporting groove, and taking down the impression material after the impression material is solidified, thereby finishing mold taking. According to the mold taking method, the three-dimensional digital acquisition technology, the digital design and the advanced manufacturing technology are combined, and accurate, rapid and efficient mold taking operation can be achieved.

A medical resin composition is produced by mixing a powder of a polymer (A) comprising repeating units having an ester group and a liquid of a vinyl ester monomer (B) having 6 or more carbon atoms to increase a viscosity and, according to demand, further performing a polymerization reaction. The thus produced resin composition inhibits leaching of irritative substances, reduces any adverse effects on the human body by endocrine disruptors, etc. and can be prepared with high operational efficiency. The resin composition is suitably used as a dental resin composition such as a tissue conditioner, a functional impression material, a lining material, a denture base material or a mouth piece material.

Provided is an aqueous composition containing alginic acid or a derivative thereof, the composition having a viscosity retained stably over a long period of time. The alginic acid-containing aqueous composition includes alginic acid or a derivative thereof (A), water (B), and a non-reducing sugar (C). Also provided are a dental alginate impression material and a base material for a dental alginate impression material each using the composition, in which the viscosity of the aqueous composition is stably maintained for a long period.

To create a digital surface model of an intra-oral anatomy, a recess or a hole in an impression material having a predetermined shape and size is scanned. The scanning results and information on the predetermined shape and size are used for determining a threshold value representing interface between the impression material and another material. The threshold value is then used in generating the digital surface model from CT scanning data of an impression of an intra-oral anatomy on said impression material.

The invention discloses an overflow type dental impression tray, The tray is a channel capable of accommodating an upper dental arch, and further comprises a third bottom plate, a second outer side wall and a second bottom plate, and a plurality of third meshes in one-to-one correspondence with first meshes are formed in the second bottom plate; a first sliding assembly enables the second bottom plate to be located above or outside the third bottom plate; a second sliding assembly enables the second outer side wall to slide on a first outer side wall and enable the third bottom plate to be incontact with or separated from the first bottom plate; and when the third bottom plate makes contact with the first bottom plate, the second bottom plate is located outside the third bottom plate. Theoverflow type dental impression tray can prevent an impression material from flowing into an oral cavity, the tray and the impression material can be quickly separated, and the overflow type dental impression tray is convenient to clean.

The invention relates to a small dental impression material automatic blending device which comprises a blending cylinder, a mixing unit and a discharging unit, the mixing unit is arranged at the upper end of the blending cylinder, and the discharging unit is arranged on the inner wall of the lower end of the blending cylinder; according to the invention, through a quantitative blending mode, theproblem of many procedures of manual proportional mixing is solved through a mechanical quantitative mode, so that the workload of dental nurses is reduced, and the quality of a dental impression material is also improved; an impression needle tube is fixed, and then the impression material is directly guided to the impression needle tube, so that the problem of material waste in the process thatnurses guide the impression material into a needle cylinder is solved.