168 results about "Alveolar ridge" patented technology

A method and apparatus is disclosed for providing implants in the upper jaws of a person. A sleeve is inserted through the alveolar ridge to the maxillary sinus. The sleeve is used to raise the subantral membrane and form a cavity. A filler, such as a bone growth stimulant is injected through the sleeve into the cavity. In the process, the sleeve also can cut and/or condense the bone around itself so that the bone can hold an implant. Optionally, the bone growth stimulant is also introduced into the bone surrounding the sleeve. During the injection, the pressure within the sleeve or the cavity is monitored to detect and prevent the rupture of the subantral membrane.

The present invention provides a novel process for producing a calcium phosphate cement or filler which hardens in a temperature dependent fashion in association with an endothermic reaction. In the reaction a limited amount of water is mixed with dry calcium phosphate precursors to produce a hydrated precursor paste. Hardening of the paste occurs rapidly at body temperature and is accompanied by the conversion of one or more of the reactants to poorly crystalline apatitic calcium phosphate. The hardened cements, fillers, growth matrices, orthopedic and delivery devices of the invention are rapidly resorbable and stimulate hard tissue growth and healing. A composite material is provided including a strongly bioresorbable, poorly crystalline apatitic calcium phosphate composite and a supplementary material. The supplementary material is in intimate contact with the hydroxyapatite material in an amount effective to impart a selected characteristic to the composite. The supplemental material may be biocompatible, bioresorbable or non-resorbable. A method for treating a bone defect also is provided by identifying a bone site suitable for receiving an implant, and introducing a strongly resorbable, poorly crystalline apatitic calcium phosphate at the implant site, whereby bone is formed at the implant site. The implant site may be a variety of sites, such as a tooth socket, non-union bone, bone prosthesis, an osteoporotic bone, an intervertebral space, an alveolar ridge or a bone fracture.

In a dental implantation, after exposure of the alveolar crest and drilling a pilot hole into the crest, a novel mill having an axial guide pin which extends into the pilot hole is used to form clearance for a cover screw or temporary healing abutment. The pilot hole is then enlarged to form clearance for the implant and the screw or abutment is attached.

A removable denture system comprising a support beam fixedly attached to the individual's alveolar ridge above the mucous membrane by a plurality of dental implants, and a denture generally conforming with the dental parameters of the individual and integrated with a supper-structure. The supper-structure comprises at least a portion shaped in confirmation with the support beam, and a denture locking arrangement for removably though fixedly articulating the denture to the support beam preventing unintentional disengagement of the denture.

An ultrasonic dental implant tool set includes an ultrasonic machine, a hand piece connected to the ultrasonic machine and tool members selectively mounted on the hand piece for providing vibrations and a compressed fluid. Each tool member has a connection base, a pole and a cutter tip. The spray nozzle has a connection base, a pole extends from the connection base and having a longitudinal fluid passage for the passing of a fluid and a fluid injection hole for injecting a fluid into a vertical hole made on the alveolar ridge of the patient to be treated, and an operating tip located on one end of the pole remote from the connection base and for insertion into the vertical hole made on the alveolar bone of the patient to transfer ultrasonic vibrations to the fluid applied to the inside of the vertical hole on the alveolar bone of the patient.

The present invention provides effective new methods and materials for maxillofacial bone augmentation, particularly alveolar ridge augmentation, that are free of problems associated with prior art methods. In one embodiment, these materials include human recombinant platelet derived growth factor (rhPDGF-BB) and a biocompatible matrix. In another embodiment, these materials include rhPDGF-BB, a deproteinized bone block or calcium phosphate, and a bioresorbable membrane. The use of these materials in the present method is effective in regenerating maxillofacial bones and facilitating achievement of stable osseointegrated implants. The mandible and maxilla are preferred bones for augmentation, and enhancement of the alveolar ridge is a preferred embodiment of the present invention.

A dental implant fixture and abutment system for use in restorative dental surgery comprises a thin coating, preferably of gold, applied to certain regions of the implant fixture and to certain regions of the abutment post, so as to mask or camouflage the unattractive dark root and crown appearance of prior art dental restorations which is caused primarily by the innate gray-black chroma of the titanium alloys out of which such restorations are conventionally fabricated. Optionally, the implant fixture may also be shaped such that, upon placement in the mouth, the transgingival portions of the implant fixture are more coronal on the palatal aspect and more apical on the facial aspect, thereby accommodating the differences in the residual alveolar ridge morphology and allowing for maintenance of peri-implant bone height post implant placement. Both one-stage and two-stage dental implant systems having such characteristics are disclosed, as are dental restoration systems in which a prosthetic tooth device or crown is combined with a one-stage or two-stage dental implant having such a characteristics.

A bone graft that is made at least partially of synthetic material or demineralized bone matrix and is manufactured in suitable shape and/or dimensions to augment an alveolar ridge. The bone graft may be such as to augment both a portion of the crest of the alveolar ridge and a portion of at least one side of the alveolar ridge. The graft may include at least one hole for the intended position of an implant base, and/or at least one hole for attachment hardware. The graft may be manufactured to standard dimensions or it may be manufactured to patient-unique dimensions which may be determined radiographically prior to surgery and prior to manufacturing of the bone graft. The bone graft may be able to be carved for dimensional adjustment during surgery. The bone graft may have composition and/or local geometry which varies from one place to another, and may have a particular composition and/or local geometry at places intended to adjoin natural bone.

The invention relates to a mandibular gingival flap stretching fixation clamp which has simple structure, is convenient to use and is used in gingival flap implant operation. When in use, a left alveolar bone fixing arm and a right alveolar bone fixing arm clamp the alveolar bone from the left and right sides, a left gingival flap stretching arm and a right gingival flap stretching arm can move oppositely, gingival flap stretching plates on the left and right gingival flap stretching arms stretch the gingival flap to the left and right sides so that the surgical site on the top of the alveolar bone can be fully exposed for operation, the dental drill for holing and the implant can not contact the gingival soft tissue, and the soft tissue can not be carried into the cavity to affect synosteosis; and after the gingival flap is stretched by the stretching fixation clamp, the hands of the doctor can be free and the operation can be performed smoothly. The mandibular gingival flap stretching fixation clamp is mainly used to stretch and fix the gingival flap after gingival is flapped in the mandibular teeth implant operation and can also be used in the mandibular teeth alveolar ridge trimming and forming operation.

A dental carrier comprises a thermoplastic carrier. The thermoplastic carrier has a pattern structure. After heating the thermoplastic carrier, the thermoplastic carrier is provided with a user to be impressed by teeth or alveolar ridge for forming teeth or alveolar ridge model of the user. Compared to the prior art, the dental carrier of the present invention can provide the dental medicament contained in the pattern structure to be precisely applied and hold onto the treatment area and the medicament can be evenly coated on the teeth, root, or periodontal tissue for the treatment of teeth. When the dental carrier is not used to carry medicament, the pattern structure can improve the mechanical strength and fitness of the dental carrier to be used as a biteplate, orthodontic retainer, periodontal dressing for treatment or protection or mouth guard in sports.

An orthodontic distalizing apparatus comprises at least one force generating element positioned intermediate a force dissipating element secured to the hard palate and/or alveolar ridge and a first tooth (e.g., a molar) that is being distalized. The at least one force generating element is positioned to apply a distalizing force on the molar in a direction substantially along a longitudinal axis of the dental arch and at a low level of the basal gingiva. The at least one force generating element may be configured to prevent inadvertent disassembly thereof during installation, adjustment and/or conversion of the apparatus between an active and a passive state. In addition, the at least one force generating element may be configured to be reversibly convertible between an active state and a passive state without requiring removal of the device from the patient's mouth. Moreover, the at least one force generating element may be configured to provide a continuous activation force of substantially constant magnitude during distalization of the molar. The apparatus may also be constructed so that the force dissipating element is connected to at least one anchoring tooth by a slidable coupling that absorbs all reaction forces transmitted substantially along a direction of the longitudinal arch. A second force dissipating element may be positioned intermediate the force dissipating element and a second tooth (e.g., a bicuspid) to facilitate the closing of any gaps that are created following distalization of the molar. A method of converting an orthodontic distalizing apparatus between an active and a passive state is also provided.

A hydrogel for use in oral care. The hydrogel is ion beam cross-linked, the hydrogel is adapted to be disposed in the oral cavity and may be adapted to provide a denture fixative or may be loaded with a whitening agent for use in whitening one or more teeth and disposed on or adjacent one or more teeth and the whitening agent is slow-released to whiten the one or more teeth. Other loading materials may include materials for treatment of alveolitis or malodor, inter alia. The present invention is a new hydrophilic oral and dental cohesive hydrogel sheet designed to securely grip and cushion prosthetic devices in the human mouth with the further ability to slow release antimicrobial or other orally desirable agents. Additionally, the invention also provides a method of making an orally cohesive device that: 1) is easily adapted and applied to a removable dental prosthesis; 2) bonds well to alveolar ridge/palatal mucosa and denture acrylic materials; and 3) releases cleanly, with no tacky or thixotropic residue when the prosthesis is removed. The cohesive hydrogel gel device is a hydrogel-forming polymer mixed with water, optionally surrounding an internal scrim, and uses an electron-beam energy source to cause cross-linking. The method does not need any chemical additive to affect the cross-linking. Furthermore the beam energy can be adjusted to optimize the cohesive properties of either side of the device, as well as to compensate for addition of orally active agents, if any are chosen. The hydrogel sheets are pre-cut to fit most sizes of maxillary and mandibular full denture prostheses, but can be easily trimmed with a scissors by the end user for the ideal custom fit of any full or partial denture, in either arch.

The invention discloses a method for producing an immediate complete or half denture based on a 3D printing technique. The method comprises the steps of preparing an impression with a remaining tooth jaw or a tooth-free jaw, transferring a jaw position relation, acquiring digital models of the remaining tooth jaw or the tooth-free jaw and the jaw position relation, setting the arrangement and the denture border of artificial teeth of the immediate complete or half denture corresponding to the form of the remaining tooth jaw or the tooth-free jaw and the jaw position relation, invoking data in a preset database, designing the artificial teeth and polishing surfaces of the artificial teeth, regulating the occlusion of the teeth to enable alveolar ridge supporting tissues to bear proper pressure distribution, and manufacturing a three-dimensional model of the immediate complete or half denture by virtue of a photo-healing three-dimensional printing technique in the 3D printing technique. The method has the advantages that the production steps are simple, the production time is short, the precision is high, the denture can be conformably worn by a patient, and meanwhile, the production cost is lowered.

A biocompatible, self-supporting, curved, collagen membrane adapted to be secured by bone tacks or bone screws over exposed bone at a desired bone graft site in the alveolar ridge of a patient such that the membrane defines a space having a predetermined height and width over the exposed bone, in which the membrane maintains its structural integrity for at least 4 months after implantation at the bone graft site and then naturally breaks down and is resorbed by the patient's body, a method of making such a membrane, and a method of using such a membrane for vertical augmentation of the alveolar ridge of the patient.

A device which allows the insertion of a flowable filling material through at least part of a dental implant inside the body to touch the bone. The implant can be hollow and to have a side perforation connecting the space inside the implant with the surrounding of the implant. This perforation can be placed initially outside the alveolar ridge. The device can allow immediate direct contact between the filling material and the tissue and for the displacement of the soft tissues covering the bone.

The invention relates to a digital preparation method of an edentulous jaw individual impression tray. The method comprises the following steps: preparing a preliminary impression, or forming a plaster model by pouring; scanning the preliminary impression or scanning the plaster model; introducing scanning data into reverse engineering software and intercepting tissue surface point cloud data of the edentulous jaw preliminary impression; acquiring point cloud data of undercut-free alveolar ridge surface; uniformly enlarging the alveolar ridge surface by 1-2mm in the normal direction of the alveolar ridge surface so as to obtain a virtual tray inner surface; uniformly thickening the virtual tray inner surface by 2mm in the normal direction thereof; designing an upper jaw virtual tray handle and a lower jaw virtual tray handle; and fusing data boundaries of the inner and outer surfaces of the virtual tray as well as the handle and saving the data in an STL format, importing the data into a computer system connected to 3D printing equipment, and making the edentulous jaw individual impression tray from a polymethyl methacrylate (PMMA) material by virtue of the 3D printing equipment. The digital designing and manufacturing method of the edentulous jaw individual impression tray can replace traditional hand-made manufacturing method.

The invention relates to a digital designing and making method of an individual tray without edentulous jaw function pressure. The method includes: making an edentulous jaw preliminary impression; scanning the impression or a model to obtain data 1; scanning alveolar ridges of upper and lower jaws to obtain jaw position relation data 2; registering the data 1 to the data 2; completing undercut filling and buffering on the surfaces of the alveolar ridges of the upper and lower jaws; creating a dentition positioning coordinate system in the data 1; scanning a pair of upper-lower jaw dentition reference gypsum models to acquire data 3; creating a dentition posture coordinate system in the data 3; registering the data 3 to the data 1 through coordinate system registering; using a triangular grid to fill gaps between upper and lower jaw data 1 and the data 3 to acquire STL data of the individual tray; printing upper-lower jaw trays. The method replaces complex steps of conventional manual making, clinical operation steps are simplified, operation difficulty is lowered, and clinical diagnosis and treatment efficiency of edentulous jaw complete denture repair is improved.

Disclosed is a measuring apparatus for three-dimensionally measuring a row of teeth, the rows of teeth of the maxilla and mandible, buccally, during articulation and during terminal occlusion, an alveolar ridge or the palate in the oral cavity, the measuring apparatus comprising an autonomously movable measuring head (1) on a shaft (4), said measuring head (1) consisting of a central measuring member (1.1) and at least two lateral measuring members (1.2, 1.3) which are movably interconnected and define a variable measurement space (6). The measuring head (1) can be placed on the row of teeth and is be guided therealong using guiding elements (1.1.1, 2.1, 2.2, 5); contact sensors (13) and angle sensors (16) ensure that the lateral measuring members are laterally guided and the angles thereof are adjusted to the topology of the alveolar ridge while the central guiding element (1.1.1) and/or a support (5) of the shaft (4) can rest on the row of teeth. Measuring units (26) for measuring the structures in the measurement space (6) are provided in the measuring members (1.1, 1.2, 1.3). Measurements are taken from multiple solid angle positions of the measuring units, said positions being preset in the measuring members (1.1, 1.2, 1.3), being adjusted by moving the measuring members (1.1, 1.2, 1.3), being taken by having mirrors move, in a controlled manner, the beam path generated by the measuring units, or being aligned by changing the angular position of the measuring head (1) relative to the shaft (4) in an automatically controlled manner.

The invention relates to an individualized biomimetic dental implant and a manufacture method thereof. The invention is characterized in that the dental implant comprises an implant body for imitating the original tooth root tissue structure of a patient's missing tooth and also comprises a biomimetic artificial alveolar bone structure outer-layer for imitating a patient's alveolar bone tissue structure. The biomimetic artificial alveolar bone structure outer-layer and the external surface of the implant body are combined as a whole. The biomimetic tooth root implant body's outer layer is a 3D printed biomimetic artificial alveolar bone structure outer-layer which is combined with the implant body to form a whole structure, and is similar to the tissue structures of missing tooth's original tooth root and alveolar bone. Thus, the invention provides an ideal implementation scheme of a biomimetic artificial tooth root structure. What is the most important is that the invention provides a structure which is beneficial to bone marrow stem cell and osteogenesis-related cell adhesion, proliferation and mineralization and gives play to final osteogenic function and has good bioactivity. Therefore, a microenvironment for promoting osteogenesis is created, osteocyte generation is induced, and early rapid and firm synosteosis is realized.

The invention discloses a semi-finished complete denture, which comprises an upper jaw and a lower jaw, wherein both the upper and the lower jaws consist of false teeth and bases, wherein the thickness of the base is 0.5-0.8mm, and a machining allowance of about 2mm is arranged along the extending direction of the edge of the base. Because the thickness of the base is only 0.5-0.8mm, a base mucous membrane tissue surface is not formed, enough space is left between the mucous membrane tissue surface and the corresponding part of an alveolar ridge to be suitable for alveolar ridges of various shapes, and a pad is additionally added so that the semi-finished complete denture can be suitable for different patients; and the base edge is provided with the machining allowance of about 2mm, so the denture is suitable for a doctor to grind the excessive base tissue when the doctor adjusts and grinds in the oral cavity of the patient after the comparison. By utilizing the semi-finished complete denture to make the complete denture, the invention has less procedures, short time and good quality. Moreover, the invention further provides a method for producing the semi-finished complete denture.