354 results about "Natural tooth" patented technology

A method is set forth for making a computer model of patient's jaws on the basis of digital information. Digital data about the jaws, teeth, soft tissues and artificial teeth is joined in computer space to create aesthetic and functional plans for the removal of teeth, shaping of supporting bone and placement of dental implants. Artificial teeth and pre-manufactured prosthetic devices are made and attached to the dental implants at the time of surgery. The aesthetic and functional position of artificial teeth is determined prior to surgical removal of natural teeth and the ideal position of implants and the proper form of the remaining bone are determined prior to surgery. Surgical guides used to shape bone, record occlusal orientation and position dental implants are manufactured using computer milling or layered manufacturing.

A preparation (10, 11,12,13) to be fixed to a natural tooth part or tooth, in particular for the replacement of a load-bearing tooth part, is for example a filling for a drilled-out tooth (1), a crown, bridge or prosthesis to be placed on a tooth stub, or a tooth pin to be fixed in a tooth root for fastening an artificial tooth, a bridge or a prosthesis. The preparation has surface regions which consist of a material with thermoplastic properties. The preparation (10, 11, 12,13) is designed in a manner such that it has oscillation properties with such low damping losses that for a liquefaction of the material with thermoplastic properties by way of oscillations there are local stress concentrations required, and in a manner such that such stress concentrations only occur in the region of the preparation surface. The preparation is positioned on a suitably prepared natural tooth part in a manner such that the material with the thermoplastic properties is in contact or may be brought into contact with the dentin surface and/or enamel surface. The preparation is then made to mechanically oscillate and is simultaneously pressed against the natural tooth part, whereby the material with the thermoplastic properties is at least partly liquefied and brought into intimate contact with the dentin or enamel surface in a manner such that after solidification it forms a positive fit and/or material fit connection. Teeth restored with such preparations have a high stability and a long life, which in particular is attributed to the fact that the thermoplastic material, in contrast to cements used for the same purpose, shrinks less and has the ability to relieve internal stress by creeping.

Systems, methods, and/or computer-readable media described herein provide technical solutions to the highly technical problems of machine generation of dental restorations. In particular, these systems, methods and/or computer readable media may provide technical solutions to aid in the creation of dental restorations that more closely resemble a natural tooth (including its internal optical structure). These systems, methods and/or computer readable media may help in virtually rendering a tooth, including its internal optical structure, and apply these renderings (e.g., digital models) to the fabrication of the dental restoration.

The invention relates to a method for producing an artificial tooth, comprising a base layer substantially determining strength and at least one cover layer substantially determining appearance of a finished artificial tooth, said method comprising: establishing the available outer shape and dimensions for the finished artificial tooth, e.g. with a CAD-CAM system; -acquiring an image of a natural tooth to be replaced by the artificial tooth or a corresponding natural tooth over at least the in use visible outer surface thereof, including variations in appearance in said outer surface; -determining in the appearance determining properties of the cover layer to correspond with the variations in the appearance of the natural tooth to be replaced or the corresponding natural tooth, and determining a thickness of the cover layer locally required for said correspondence; -constructing the base layer to a shape and dimensions, which are based on the shape and dimensions available for the artificial tooth and prior to construction deducting, in the CAD-CAM system therefrom the locally required thickness of the cover layer, and -applying the cover layer over the base layer to attain the available outer shape and dimensions for the finished artificial tooth.

A prosthetic dental device has an inner portion formed of an inner material and an outer portion formed of an outer material that covers at least a part of the inner portion. The inner material is substantially different from the color of natural teeth while the outer material is substantially the same color as natural teeth. Both the inner material and the outer material comprise a polymer.

A biofunctional dental implant system for affixing a crown to an implant socket that is made in the bone structure within the mouth of a dental patient. A root portion is initially anchored within the implant socket made in the patient's bone structure. According to a first embodiment of this invention, the crown is secured to the root portion by a flexible abutment post. According to a second embodiment, the crown is secured to the root portion by a hollow abutment tube. The dental implant system of this invention is capable of increasing bone/implant stabilization and providing a supply path through which to evenly distribute human growth factor to the bone structure surrounding the root portion. The system also enables the crown to have a selectively controllable mobility relative to the root portion that is anchored within the implant socket so as to advantageously function like a natural tooth.

Dental implants made at least in part of a porous tantalum material for enhancing the osseointegration of the dental implant into surrounding bone. For example, there is provided a dental implant which includes a porous tantalum portion and an outer portion having a color generally replicating the color of natural teeth. The dental implant further comprises a core portion and the porous tantalum portion at least partially surrounds the core portion. An esthetic portion is disposed at least the outer portion and the porous tantalum portion is disposed for at least partially reinforcing the esthetic portion. After implantation of the implant, bone tissue may osseointegrate into the porous tantalum portion to anchor the implant in position within the surrounding bone. Other embodiments of implants are provided, each implant including at least a portion thereof formed of porous tantalum for improved osseointegration.

A method for making a denture comprising a base and a plurality of teeth joined thereto. The method comprises forming a first cavity in a block of a denture base material, the first cavity being formed to match the contour of natural teeth as arranged on maxillae or on a mandible; filling the first cavity with a first fluid synthetic tooth material and solidifying the first fluid synthetic tooth material into a first solid synthetic tooth material; removing a portion of the first solid synthetic tooth material to form the plurality of teeth; and removing a portion of the block of denture base material to form the denture base. The steps of the method may be implemented by a computer. An apparatus for making the denture according to certain embodiments of the method, and a denture comprised of a base and artificial teeth are also disclosed.

Custom dental prosthesis or implants each individually designed and manufactured to replace nonfunctional natural teeth positioned in a jawbone of a specific pre-identified patient are provided. An example dental prosthesis/implant includes a dental implant body having a prosthesis interface formed therein to receive an occlusally-facing dental prosthesis component. The prosthesis interface has a custom three-dimensional surface shape positioned and formed to create a form locking fit with respect to the occlusally-facing dental prosthesis component when positioned thereon.

A dental crown consisting essentially of stabilized zirconia. The dental crown is particularly suited for pedodontic and veterinary applications. The zirconia crown may be formed by one of several manufacturing processes. The formed crown exterior is polished and fine polished to produce an aesthetic outer surface mimicking a natural tooth. Also disclosed is a method for providing a dental crown to a natural tooth and a kit of prefabricated crowns.

Dental implant assemblies, custom dental implants, and custom dental prosthesis and components each individually designed and manufactured to replace nonfunctional natural teeth of a specific pre-identified patient are provided. An example dental prosthesis/assembly includes a transgingival interlock abutment having a prosthesis interface formed therein to receive an occlusally-facing dental prosthesis component, and an implant interface form to receive a dental implant body. The prosthesis interface has a custom three-dimensional surface shape formed to create a form locking fit with respect to the occlusally-facing dental prosthesis component when connected herewith. The implant interface also has a custom three-dimensional surface shape formed to create a form locking fit with respect to the dental implant component when connected therewith.

A dental prosthesis or template (10) simulates the front surfaces of a patient's teeth and is overlayed over a patient's natural teeth (40) to provide an indication of what a dental porcelain overlay may look like once applied to the patient's teeth. The dental template preferably is made from a flexible urethane or sanaprene material to allow the template to be applied against the person's natural teeth and temporarily adhere the template to his teeth provide for the visual demonstration of potential improvement to the patient's smile. The dental template (10) can be adhered to a set gel or registration paste to set the facial plane (75) at which the overlay should lie relative to the tooth plane (73) of the natural teeth (40) to establish a final restoration with an ideal and naturally appearing aesthetic result as it relates to horizontal facial planes and facial appearances.

The present invention provides a dental mill blank having excellent mechanical strength and having gloss retention high enough to maintain the gloss similar to that of natural teeth in an oral cavity for a long period of time. The present invention is a dental mill blank made of a cured product of a curable composition containing: a polymerizable monomer (A); and a spherical inorganic filler (B) having an average primary particle size of not less than 0.1 μm and less than 1 μm.

Root canal abutment devices and methods which facilitate the adjustment or removal of an oral appliance, e.g., a crown or bridge, from a reconfigurable abutment assembly are described. The adjustable abutment assembly may be secured within a pulp chamber of a pre-existing tooth. The abutment assembly has a projecting abutment portion with one or more shape memory alloy sleeves or plates or elements extending along the abutment. Each of the sleeves has a length with at least one curved or arcuate portion. Energy may be applied to the elements such that the arcuate portion flattens to allow for the oral appliance to be placed thereupon while removal of the energy allows the elements to reconfigure into its curved configuration thereby locking the oral appliance to the abutment. Removal of the oral appliance may be effected by reapplication of energy to the elements.

A dental polymerizable and curable composition that can be used as a dental composite restorative featuring excellent handling property at the time of filling, a small contraction upon polymerization, a high bending strength, excellent surface smoothness and wear resistance, and a very good matching of color tone to the natural tooth after restored.

The invention provides a tooth cosmetic veneering method, which comprises the following steps that: spinels are adopted for porcelain laminate veneering, wherein the veneer thickness can be controlled between 0.5 and 0.8; tooth surfaces are free from being processed, so that painless cosmetology is realized; temporary teeth are free from being worn, so that inconvenience of a person being subject to cosmetology can be reduced; and the tongue side parts of teeth are free from being processed, so that jaw teeth can be effectively protected, and 'foreign body feeling' is free. In the invention, a compound material prepared by a special glass permeation method is adopted, the strength can reach over 400 Mpa after bonding, the durability of the prepared spinel porcelain laminate tooth veneer can reach over 10 years; the prepared spinel porcelain laminate tooth veneer has the optical speciality being the same as that of natural tooth tissues, and has a simulation cosmetic effect; the material has good mechanical and physical properties so as to bear high stress, high acid corrosion resistance, and low heat conduction property so that the tooth body can not be irritated by heating, and no stimulation is caused to teeth pulp when people eat cold and hot food; the material has a self-cleaning capability, so that bacteria are difficult to grow; the X-ray transmission property is good; and the cost is low.

The invention relates to a preparation method of tooth color imitating dental tetragonal polycrystalline zirconia ceramics, which specifically comprises the following steps: taking a 3Y-TZP ceramic ingot as the raw material, taking rare earth oxide and transition element oxide as the colorant, adding the colorant and absolute ethyl alcohol into 3Y-TZP, ball milling, adding the 3Y-TZP, the absolute ethyl alcohol and agate ball milling beads into an agate ball milling pot by the mass ratio of 1:1:1, then drying, dry pressing and forming, isopressing and forming; and sintering at normal pressure, cutting and forming to obtain the tooth color imitating dental tetragonal polycrystalline zirconia ceramics. The preparation method of tooth color imitating dental tetragonal polycrystalline zirconia ceramics has the advantages that the chromatic values of 6 types of zirconia ceramics are within the range of natural tooth color, the color stability is good, the mechanical properties are excellent, and a constructed two-stage sintering process is beneficial to industrialized popularization, expands the adaptation disease scope thereof in dental clinical medicine and provides bases for the localization thereof.

The invention discloses a multiple-oxide-doped gradient-color zirconia dental prosthesis and a preparation method thereof. The multiple-oxide-doped gradient-color zirconia dental prosthesis is formed by mixing and overlaying more than one of dental zirconia porcelain mixed powder A, B and C with powder D on each porcelain layer according to different mass fractions. The three mixed powder is obtained by respectively doping ErO2, CeO2 and Fe2O3 with zirconia porcelain raw materials. The powder D refers to undoped zirconia porcelain raw materials. The preparation method includes mixed powder preparation, pre-dry-pressing, dry pressing, cold isostatic pressure forming, pre-sintering, blank engraving and final sintering. The preparation method is simple and easy to operate, the obtained prosthesis is wide in color regulation range and uniform in transition and has similar distribution characteristics to a natural tooth, and attractiveness of the zirconia all-porcelain prosthesis is improved. In addition, through the dry pressing process added during forming, uniformity of a powder overlaying and mixing stage is guaranteed and sintering body volume density and strength are improved.

A method for manufacturing a dental restoration, including: determining an external form and dimensions available for a completed restoration; obtaining an image of a natural tooth to be replaced with the restoration or a tooth corresponding therewith, wherein the image comprises at least the external surface visible in use of the to be replaced or corresponding tooth, with variations in the appearance therein; defining locally on and at least to visible depth below the surface of appearance-determining properties of at least one material to be applied for the restoration in accordance with the obtained image and the variations in the appearance therein; constructing the restoration, including the steps of: providing at least one material to be applied in non-cohesive form; and providing cohesion to the material in accordance with the available form and dimensions.