86 results about "Body of mandible" patented technology

A computer implemented method of creating a dental model for use in dental articulation includes providing a first set of digital data corresponding to an upper arch image of at least a portion of an upper dental arch of a patient, providing a second set of digital data corresponding to a lower arch image of at least a portion of a lower dental arch of the patient, and providing hinge axis data representative of the spatial orientation of at least one of the upper and lower dental arches relative to a condylar axis of the patient. A reference hinge axis is created relative to the upper and lower arch images based on the hinge axis data. Further, the method may include bite alignment data for use in aligning the lower and upper arch images. Yet further, the method may include providing data associated with condyle geometry of the patient, so as to provide limitations on the movement of at least the lower arch image when the arch images are displayed. Further, a wobbling technique may be used to determine an occlusal position of the lower and upper dental arches. Various computer implemented methods of dental articulation are also described. For example, such dental articulation methods may include moving at least one of the upper and lower arch images to simulate relative movement of one of the upper and lower dental arches of the patient, may include displaying another image with the upper and lower dental arches of the dental articulation model, and/or may include playing back recorded motion of a patient's mandible using the dental articulation model.

A system for mandibular reconstruction generally includes an elongated locking plate having a plurality of internally threaded apertures and a plurality of fasteners. Each fastener includes a main body portion having an upper threaded shaft and a lower threaded shaft. The lower threaded shaft is adapted to engage the mandible. Each fastener further includes a removable head portion internally threaded for engaging the upper shaft portion and externally threaded for engaging a selected one of the internally threaded apertures of the locking plate. In the preferred embodiment, the thread leads of the head portion and lower shaft of the main body portion are identical. A method of mandibular osteosynthesis utilizes the system of osteosynthesis and generally comprises the steps of temporarily securing the elongated locking plate to the mandible with at least one fastener by engaging the threads of the lower portion with the mandible and threadably engaging the head with the locking plate, unthreading the head portion from the main body of the fastener to thereby allow displacement of the locking plate from the mandible without removing the fasteners from the mandible, performing a surgical procedure (e.g., removal of a cancerous growth), and re-securing the elongated plate to the fastener with the removable head portion.

A system for mandibular reconstruction generally includes an elongated locking plate having a plurality of internally threaded apertures and a plurality of fasteners. Each fastener includes a main body portion having an upper threaded shaft and a lower threaded shaft. The lower threaded shaft is adapted to engage the mandible. Each fastener further includes a removable head portion internally threaded for engaging the upper shaft portion and externally threaded for engaging a selected one of the internally threaded apertures of the locking plate. In the preferred embodiment, the thread leads of the head portion and lower shaft of the main body portion are identical. A method of mandibular osteosynthesis utilizes the system of osteosynthesis and generally comprises the steps of temporarily securing the elongated locking plate to the mandible with at least one fastener by engaging the threads of the lower portion with the mandible and threadably engaging the head with the locking plate, unthreading the head portion from the main body of the fastener to thereby allow displacement of the locking plate from the mandible without removing the fasteners from the mandible, performing a surgical procedure (e.g., removal of a cancerous growth), and re-securing the elongated plate to the fastener with the removable head portion.

Computer-implemented methods to plan, display and evaluate orthodontic treatment plans. A plurality of teeth in a representation on a computer display may be moved simultaneously in accordance with a mathematically defined pattern. Software tools available to generate the treatment path may include adjusting the smile teeth, moving teeth along a curve fit to points in the mandible, individually moving a tooth, cross sectioning to check for interference and simulations of occlusal points, highlighting teeth that have moved from their original position, making notations on the teeth, and generating and saving animation sequences of before and after treatment tooth positions.

A removable magnetic dental appliance is provided. The magnetic dental appliance can be used in the treatment of various conditions, including but not limited to, snoring, sleep apnea, some forms of temporomandibular joint pain or inflammation, myofascial pain or bruxism. The appliance comprises an upper arch attachment member and a lower arch attachment member, each for removably engaging at least a portion of the dentition. A magnetic component is positioned anteriorly on one of the upper arch attachment member or the lower arch attachment member and a magnet-attracted element is provided on the other arch attachment member for magnetic engagement with the magnetic component when the upper and lower arch attachment members are substantially vertically aligned. The appliance uses magnetic force to selectively position the mandible while still permitting movement of the mandible relative to the maxilla for improved comfort. A use of the magnetic dental appliance and a kit comprising the magnetic dental appliance are also provided

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.

A cover screw for a dental implant seals a threaded hole of an implant fixture formed in a mandible or maxilla. The cover screw is formed of a main body and a membrane fixing screw, and is attached to the implant fixture until the implant fixture is thoroughly connected to the mandible or maxilla in an implantation hole. The main body includes a first male screw to be screwed into the threaded hole of the implant fixture, an outer face formed on a side opposite to the male screw and facing an oral cavity, and a threaded hole formed on a side of the outer face. The threaded hole has a diameter smaller than that of the male screw and extends parallel to the male screw. The membrane fixing screw has a head, and a second male screw to be screwed in the threaded hole. A barrier membrane is properly held between the main body and the head.

An apparatus for osteosynthesis of a mandible. An elongated plate has a plurality of apertures. A cover has a lateral wall, a top wall, and a medial wall defining a channel. A portion of the mandible is resected to leave a bony gap. The elongated plate is received within the channel of the cover, and the cover is received within the bony gap to alleviate growth of soft tissue against the elongated plate. Screw fasteners received through the apertures of the elongated plate secure the plate to the mandible.

A dental articulator (5) capable of reproducing or analyzing a physiological occlusion status by implementing a pressure receiving function and a traction function capable of operating in all the motion directions equivalently provided by a jaw joint function of a living body with a teeth plaster model fitted between upper and lower jaw frames, comprising an occlusal plane table (8) having the same anteversion angle as the occlusal plane oblique angle of a living body; a bite analysis plate (9) on which average positions of a spew center (91) and a posterior motion axis (92) are set at a plurality of positions and they are sketched in pairs with the average positions of the spew center on one side and those of the posterior motion axis on the other side of the plate; an incisal guidance plate (56) in which an inverted conical slope for mapping front-and-rear, right-and-left inclinations of the cusp is cut to allow the tip of an incisal guide to slide; and a transform plate (1) which is fitted using a lower jaw frame (52) as a base, wherein the teeth plaster model (7) of a lower jaw is mounted on and fitted to the transform plate (1) to effect a shift operation, thereby reproducing physiological occlusion status in conjunction with an intercuspal position and a posterior occlusion position of a living body.

Dental simulation apparatus comprising a six degrees of freedom motion actuator having an upper mobile portion; an artificial mandible secured to the mobile portion of the motion actuator, the artificial mandible being arranged to receive a plurality of artificial teeth or other dental restoratives; and an artificial maxilla rigidly located about the artificial mandible, the artificial maxilla also being arranged to receive a plurality of artificial teeth or other dental restoratives.

The present invention discloses a safe surgical mouth gag (MG) comprising a substantially planar frame larger than the maximal mouth aperture which is defined by at least two cross members, i.e., a longitudinal maxillary cross member and a mandibular cross member and by at least one rod connecting said maxillary and said mandibular cross members; and modules maneuverably interconnected to the same. Said modules are selected from a tongue blade approximately perpendicular to said frames' plane, which is vertically displaceable with respect to said mandibular cross member; a retaining member within which said tongue blade shaft is slidably displaceable; retraction elements for urging the cheeks away from the oral cavity; abutment members for contacting the upper teeth or upper maxilla; and at least one light auxiliary located adjacent to oral cavity, adapted to illuminate the same effectively.

Monson spherical plate has an arch chart drawn thereon for preparing an arch wire. A maxillary dental arch curve and a mandibular dental arch curve are drawn on concave and convex surfaces of a Monson spherical plate and an arch wire afforded with a Monson curve is prepared along this arch curve. It is possible to inhibit Christensen phenomenon and changes in the curve of occlusion and to smooth muscle movements around the mandible. An arch wire having a curve corresponding to the curve of occlusion can be prepared using the Monson spherical plate.

The invention provides a mandibular condyle motion track measuring method for manufacturing A mandibular condyle prosthesis. The method comprises the following steps: acquiring a mandible three-dimensional model, a standard maxilla-mandible dentition three-dimensional model and a mandibular motion track of a patient, wherein targets include an upper target and a lower target; matching the maxilla-mandible dentition three-dimensional model with the mandible three-dimensional model, substituting a lower dentition in the maxilla-mandible dentition three-dimensional model for a lower dentition inthe mandible three-dimensional model to obtain a standard mandible three-dimensional model; matching the mandibular motion track with the standard mandible three-dimensional model; performing calculation to obtain the motion track of mandibular condyle according to the mandibular motion track and a preset function side of the mandibular condyle on the mandible three-dimensional model. According tothe method, the standard maxilla-mandible dentition three-dimensional model is taken as a middle bridge, and the mandibular condyle motion track is obtained according to the mandibular motion track obtained by measuring with a mandibular motion track scanning instrument, so that accurate measurement of the mandibular condyle motion track is realized.

The present invention addresses the problem of providing an orthodontic retainer with which there are no aesthetic concerns and smooth pronunciation during conversation is possible, and which is able to secure favorable fitting and can be worn for long periods. The retainer is configured so that, by being fitted so as to surround the entire dental arch (T) of the maxilla (A) or the mandible and by the inner surface being fitted, on the front and back surfaces of the entire dental arch (T), with a specified vertical width (H) that encompasses the cervical sections (T1, T2) of said teeth, a retaining force is applied on a portion of the crown (T3) of each tooth from the front and back surfaces.

The invention discloses a multiloop edgewise arch wire for jaw malformation correction and a jaw malformation correction method. The multiloop edgewise arch wire is composed of bracket fixing wires and boot-shaped loops which correspond to each other one by one; the two ends of each bracket fixing wire are connected with a first connecting wire and a second connecting wire of the corresponding boot-shaped loop respectively, and the first connecting wires and the second connecting wires of the boot-shaped loops are arranged in parallel or in a certain included angle; first connecting points between the first connecting wires and the corresponding bracket fixing wires and second connecting points between the second connecting wires and the corresponding bracket fixing wires are arranged in a staggered mode; the first connecting points and the second connecting points are located on two horizontal lines respectively. According to the jaw malformation correction method, force borne by teeth when jawbones move is regulated through the multiloop edgewise arch wire for jaw malformation correction, force transmission among the teeth is achieved to enable all the teeth to be finally located on the appropriate occlusion plane, therefore, the lower jawbone is induced to rotate clockwise, anticlockwise and laterally, occlusion reconstruction is successfully achieved, and the appearance of the teeth and the whole face is beautified.

The invention relates to a novel impacted molar correction device. The device adopts the technical scheme comprising the following steps of: implanting implanting screws in the corresponding positions at an upper jaw bone and a lower jaw bone according to the concrete condition of the impacted molars; connecting the implants with the impacted molars by using loop-rod connecting bodies; and pushing the third impacted molar to a far-middle position so as to make the third impacted molar upright by applying force by using a chain-like rubber band or a nickel-titanium tension spring and along with the release of the force of the chain-like rubber band. The correction device releases the reacting force for correcting the impacted molars to the anchorage implants through a loop-rod structure, without adverse influence on other teeth and with higher correcting efficiency.

A convertible oral bite plate appliance has at least one removable occusal shim attached and conforming to the outer surface of a base. The removable occlusal shim is preferably attached by complementary ribs and grooves on the lingual and buccal/labial portions of the occlusal shim and the base. Elastic bands may optionally be used to connect the maxillary and mandibular occlusal shims to pull the lower jaw anteriorly.

The invention relates to a navigation physical system for precisely cutting the bone of a mandible, in particular to a manufacturing method of a navigation entity for an individuation angle of mandible obesity operation. Aiming at cutting the bone with obese angle of mandible which is a common cranio-jaw-facial operation, the invention realizes the three dimensional accurate cutting bone of the angle of mandible through the operation navigation entity which is formed by the rapid manufacturing technique, improves the operation quality and reduces complications. Compared with the conventional technique, the invention has the advantages that the individuation operation navigation entity is formed by the rapid manufacturing technique, thus guiding the accuracy of cutting bone and bilateral symmetry. In addition, on the basis, the accurate operation navigation technique which is realized by the rapid molding also can be applied to other cranio-jaw-facial plastic operations, thus realizing the digitizing and accuracy of the operation.

The present invention is concerned with an apparatus for simulating the chewing process for the purpose of testing dental materials and implants and for the purpose of analyzing food samples. The apparatus comprises a frame, a stationary platform connected compliantly to the said frame and a moving platform corresponding to the maxillae and mandible of humans or animals, to which dentures or teeth are affixed. The moving platform is guided and driven in mandibular motion using six rods fitted with spherical joints at both ends. Said ball-jointed rods are attached with one end to the moving platform, and with the other end either to the frame of the apparatus, or to rotary cranks driven synchronously by a motor via a transmission. The rotary cranks together with their motor and transmission are mounted on a carrier which is adjustably attached to the frame of the apparatus. To closely reproduce a desired mandibular motion, the locations of the spherical joints to the frame, the position and orientation of the carrier relative to the frame, and the lengths of the rotary cranks and of the ball-jointed rods are suitably adjusted.

The dental splints are used for treating temporomandibular disorders, clenchers, bruxism and headaches resulting from improper alignment of the jaws. The dental splints include a maxillary splint and a mandibular splint. Both splints are formed from stents having a U-shaped trough filled with a dental acrylic and cured in situ on the patient's maxillary teeth and mandibular teeth, respectively. The apparatus includes a maxillary plane analyzer and a holding plate. The holding plate is a U-shaped plate having a central slot for receiving a stem of the plane analyzer and a plurality of recesses for receiving temporary cleats extending from the maxillary stent. The plane analyzer includes a handle, a U-shaped base mounted on the handle and including a pair of arms adapted for extending to either side of the mandible, a stem extending between the arms of the base, and a cruciform upright mounted on the handle.

The invention discloses a string bag type lower jawbone implant applying a three-dimensional printing technology, and belongs to the technical field of medical treatment. According to the string bag type lower jawbone implant applying the three-dimensional printing technology, a string bag type lower jawbone implant meeting individual requirements is made by the adoption of the three-dimensional printing technology, thus, different string bag type lower jawbone implants can be designed according to different individualization, and the individualized deigns accord with original skeleton forms of different individuals; meanwhile, the implant comprises a string bag type main body, wherein the inner diameter and the outer diameter of the gingiva are larger than the inner diameter and the outer diameter of the lower jawbone inferior margin, and a fixing body close to the middle uninjured side and a fixing body away from the middle uninjured side are integrally formed at the two ends of the sting bag type main body respectively. Meanwhile, according to the string bag type lower jawbone implant applying the three-dimensional printing technology, the string bag type main body, the fixing body close to the middle uninjured side and the fixing body away from the middle uninjured side are all porous thin layers, thus, the problem that the lower jawbone repairing work is poor in effect due to the fact that fixing is conducted through a titanium clamping plate in the prior art is overcome, the effect of the lower jawbone repairing work is further improved, and the successful repairing of the lower jawbone is further guaranteed.