93 results about "Molar" patented technology

Provided herein are systems and methods for determining if a 3D tooth model requires trimming or removal of incomplete or missing data (e.g., gingiva covering a portion of a tooth such as a molar). A patient's dentition may be scanned and / or segmented. Raw dental features, principal component analysis (PCA) features, and / or other features may be extracted and compared to those of other teeth, such as those obtained through automated machine learning systems. A classifier can identify and / or output probability that the 3D tooth model requires trimming. Trimming of the 3D tooth model can be implemented without human intervention.

A device for collecting and transporting aqueous fluid from the oral cavity to a lateral chromatographic strip for test is disclosed. The lateral chromatographic strip is placed within and extend along a cavity defined in a housing. At least one inspection site to the lateral chromatographic strip is provided to enable inspection of selected sites on the lateral chromatographic strip for test results. A porous wick material protrudes from the housing to a collection site exterior of the housing at one end and communicates to the lateral chromatographic strip at the other end. The porous wick material has particulate construction, the particles adsorbing aqueous oral fluid to transport the fluid from the mouth to the lateral chromatographic strip without substantial absorption. The particles of the porous wick material are bound together to define a continuous interstitial volume for the flow of oral fluid to be transported and are treated to be hydrophilic to the adsorbed oral fluids. The porous wick material readily releases oral fluid to the lateral chromatographic strip. Prevention of reverse flow to the oral cavity from the lateral chromatographic strip naturally occurs due to the circuitous flow path of the porous wick material. A bite plate is coupled to the housing and insertable between the teeth of the patient to position the porous wick in the oral cavity for collecting the oral fluid. The bite plate is typically held in place by the occlusal force of the teeth, preferably the molars and / or the bicuspids, to position the porous wick in the buccal space. By observing the lateral chromatographic strip while the test device is in the mouth immediate test results are obtained.

Disclosed herein is an apparatus for correcting the position of teeth used in dentistry. The apparatus for correcting the position of teeth is constructed in a structure in which an implantation unit is securely fixed to a palate, e.g., the roof of a mouth, the bony tissue of which is very excellent and the soft tissue thickness of which is small, using a fixing source, opposite suspension parts are suspended by opposite buccal molar areas to draw front teeth backward, whereby the movement of teeth at the molar tooth areas is prevented, and therefore, reimplantation is unnecessary, application points for drawing the front teeth, including the molar teeth, backward are located at the buccal molar areas, whereby the application of a force (a correction force) is easy, it is possible to induce natural extension of a dental arch (an arch-shaped area where teeth are implanted), and the teeth are moved backward to correct the irregularities of teeth, whereby it is possible to considerably reduce a possibility of tooth extraction.

A non-custom, tray-shaped dental treatment device includes a moisture-resistant barrier layer having a front side wall and a bottom wall, and a dental treatment composition. In addition, the tray-shaped dental treatment device includes at least one of the following anatomical features to enhance the fit of the device: (1) the bottom wall includes a plurality of cuts positioned to help the bottom wall better conform to abrupt changes in the diameters of a person's teeth where the bicuspids and canines meet, and / or (2) the bottom wall includes at least one V-shaped or U-shaped indentation configured to be inserted into the depression typically found along the top surfaces of a person's molars, and / or (3) the front side wall and bottom wall include radii of curvature that account for typical flaring of a patient's incisors.

Mandibular attachment structure, devoid of elastomeric member, for use in an orthodontic assembly having a force member connecting the mandibular and maxillar portions of the assembly and method of using the same. The structure includes bands dimensioned to encircle corresponding lower molars on opposite sides of the tongue, a single arched member connecting the bands and extending along a lingual side of the lower teeth, and threadless couplers each of which is affixed to a labial side of a corresponding band. Neither the structure nor the method require the use of an orthodontic brace to maintain a pressing connection between the structure and the rest of an orthodontic assembly. The pressing connection is maintained by cooperating a hook at the end of the force member and a hook at the end of a threadless coupler.

An orthodontic appliance in one aspect for a maxillary second molar tooth is pre-adjusted to provide a distal offset that is in the range of about 6 degrees to about 10 degrees and a torque that is greater in a negative direction than about −15 degrees. In another aspect, an orthodontic appliance for a molar tooth has a buccal wall with a recess, and a notch is located in the recess for facilitating positioning the appliance on the tooth.

The invention discloses a novel digestive molar rod for a pet, and belongs to the field of pet videos. According to the novel digestive molar rod for the pet, pressurizing blocks are arranged, friction blocks are uniformly and fixedly arranged on the outer surfaces of the pressurizing blocks, the friction blocks and shaping blocks are alternately arranged, so that the contact area between the molar rod and teeth is conveniently increased, tooth stains are conveniently removed from the teeth of the pet, cleaning blocks are arranged on the inner surfaces of the pressurizing blocks, the peripheries of the teeth of the pet can be effectively buffered, a proper amount of medicine is injected into a medicine reaction bin in an injection mode, in the biting process of the pet, through telescopingand extruding of telescopic parts, the medicine is extruded out to release balls through pressurizing shafts and is released into a mouth of the pet through the cleaning blocks, and therefore the health of the pet can be conveniently maintained in a guided mode.

A sliding molar distalizer is provided. The distalizer features a canine attachment bracket, a molar tube, and a rod connected to the bracket and having an engagement end for engaging the molar tube. A hook formed on a portion of the rod receives an elastic for imparting distalization force directly on the distalizer towards the molar tube. An orthodontic tube formed on the attachment bracket holds an archwire that passes through premolar brackets. A buccal push flange lever is formed at a distal portion of the rod for imparting force on the molar tube.

The invention discloses an erecting auxiliary spring for an impacted molar of a lower jaw. The erecting auxiliary spring acts on an external surface of a tooth in cooperation with a tooth fixed corrective appliance and comprises an L-shaped tape-ring erecting auxiliary spring adaptive to a side face of the impacted molar, wherein a proximal end of the erecting auxiliary spring is bent into an elastic ring, and a distal end of the erecting auxiliary spring is bent into a hook which is adaptive to a primary arch wire. The impacted molar can be erected by a light force, the tape-ring auxiliary spring is adjusted in batches to carry out gradual stressing, and thus, the forward-tilting impacted molar is erected. Moving requirements of other teeth are not affected, the production is simple, theadjusting is easy, foreign body sensation is low, wearing is comfortable, and the erecting auxiliary spring is healthy and clean and is free of complications.

The invention provides a method for establishing a rat periodontitis model, and belongs to the technical field of periodontology. The rat periodontitis model is established by injecting drugs into a plurality of rats to be modeled; the rats suffering from periodontitis are divided into a hard food feeding group and a soft food feeding group, hard food is fed to the rats suffering from periodontitis in the hard food feeding group, and soft food is fed to the rats suffering from periodontitis in the soft food feeding group; and maxilla specimens in molar regions at the two sides of the rats suffering from periodontitis are separated, and local tissues are scanned to confirm the establishment of a mechanical load composite model of the rats suffering from periodontitis . Through iconographicanalysis on to-be-modeled tissues of the rats, it is proved that the pathological change of the local periodontal tissues of the rats suffering from periodontitis is detected by changing the hardnessof the food, and the pathological process of clinical dentition defects accompanied by periodontitis affected teeth is fully simulated; and an innovative method is provided for designing and researching dentures of patients with periodontal diseases and dentition defects accompanied by the periodontal diseases.

The invention provides a personalized appliance for pulling molar to distal part. The appliance comprises an anchorage assembly and a molar pulling assembly used for applying force to molar to be corrected, the anchorage assembly is connected to the molar pulling assembly, the anchorage assembly comprises a connecting piece and a plurality of retainers, the retainers are arranged on upper anchorage teeth and / or lower anchorage teeth respectively, and the molar pulling assembly comprises a positioning curve, a traction hook, a tongue side tongue buckle, a buccal side tongue buckle and an elastic tension piece. The appliance is accurate in correction and high in correction efficiency, the molar pulling assembly can apply pulling force to the molar to be corrected and move the molar towards the distal part, and the purpose of correction is effectively achieved.

An apparatus for dental irrigation may be provided to project fluid onto the surfaces of, and the interproximal spaces between, a user's teeth and gum-line. The apparatus may comprise two hollow U-shaped manifolds having orifices located on their interior faces used as fluid jets. The manifolds may be connected, at a central point of reflection, by a rotating inlet joint which supplies the fluid flow. When placed in the user's mouth, the apparatus may be designed to receive the top and bottom sets of teeth in each corresponding U-shaped manifold, with orifices configured to provide fluid jets aligned towards the lingual and buccal side of the teeth. The orifices may be staggered to provide staggered fluid flow. A user's teeth may be cleaned with a controlled fluid flow by moving the apparatus in a sweeping motion between each set of rear molars.

The invention relates to a virtual tooth root generation method capable of controlling the shape. The method mainly comprises the following steps of: 1, establishing a three-dimensional coordinate system M1, and drawing a tooth root virtual contour in an X1Y1 plane of the three-dimensional coordinate system M1, 2, determining an actual boundary line L of any tooth T, 3, selecting any point p on the boundary line L, and determining a plane D, 4, establishing a three-dimensional coordinate system M2, 5, determining a transformation matrix A of the tooth root virtual contour from the three-dimensional coordinate system M1 to the three-dimensional coordinate system M2, and 6, obtaining a final curved surface K1, namely the required virtual tooth root, by utilizing the transformation matrix A.By means of the method, virtual tooth roots in different shapes can be generated for incisor teeth, canine teeth and molar teeth, the recognition degree of various teeth is improved, and the method can be achieved only through one algorithm.

A device and method for performing orthodontic decompensation before orthognathic surgery without the aid of braces. The device includes an archwire coupled at either end to a band which is in turn adhered to the first molars of a patient. Disposed along the length of the archwire is a plurality of fixtures which may include a plurality of hooks that work in conjunction with elastics or other components used during the orthognathic procedure. The archwire is formed around the patient's teeth so as to be passive and maintain the patient's current orthodontic treatment progress. The device may be placed on either or both of the upper and lower teeth of the patient before the orthognathic procedure thereby ensuring that the teeth will not move during or after the surgery during the recovery process and that required surgical splints will still fit.