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177 results about "Oral tissue" patented technology

Treatment of tissue in sphincters, sinuses and orifices

The invention provides a method and system for ablation of body structures or tissue in a sphincter, sinus or orifice such as the rectum, colon, esophagus, vagina, penis, larynx or pharynx. In one aspect of the invention, the environment surrounding the targeted ablation region can be isolated or controlled by blocking the flow of gases or liquids using an inflatable balloon positioned immediately adjacent to the tissue that is to be ablated. In a preferred embodiment, the inflatable balloon also serves to anchor the catheter in place and prevent the catheter from being expelled from the body. The inflatable balloon also insures that locally administered drug remain in the area where most needed. In a second aspect of the invention, positive pressure is used to inflate the balloon. Inflation of balloon triggers the extension of at least one curvilinear electrode into the targeted tissue. Negative pressure deflates the air sac and helps retract the curvilinear electrodes so as to allow the catheter to be removed from the body without damaging adjacent body structures. In a third aspect of the invention, the electrodes are coupled to sensors that measure properties of the target region such as temperature and impedance. Measurement of these properties permits the use of feedback technique to control delivery of the RF energy and administration of fluids for cooling and hydrating the affected tissues. In a fourth aspect of the invention, the catheter includes an optical path that can be coupled to external viewing apparatus. In this way, the position of the electrodes in the body can be determined by fluoroscopic or fiber optic techniques.
Owner:NOVASYS MEDICAL

Digitalized making method of dental orthodontic appliance and fixed appliance

The invention discloses a digitalized making method of a dental orthodontic appliance. The digitalized making method comprises the steps of acquiring CT (Computed Tomography) data and carrying out intraoral scanning; reconstructing a three-dimensional oral tissue model to obtain bones and teeth; reconstructing intraoral scanning data to obtain gingivas and accurate teeth; compounding two models to obtain a composite model; calculating key parameters including tooth movement amount, required orthodontic force and moment, and force applying mode and the like, discharging a treated target dentition; accurately calculating a mode of moving each tooth and a movement distance or an angle, calculating a required force and moment; calculating required shape and size parameters of an SMP force applying mechanism, and further designing a force applying unit; generating an immobilizing structure according to the three-dimensional model of each tooth on the basis of the surface; designing accessories according to certain special movements so as to obtain an integral structure of an integrated orthodontic appliance; making an integrated orthodontic appliance by using a three-dimensional printer integrally formed from multiple materials, and providing the integrated orthodontic appliance for being clinically used by a doctor; and during clinical use, heating the integrated orthodontic appliance to a phase change temperature to ensure that the force applying unit becomes soft and is conveniently adhered and fixed on the surface of the tooth. An integrated fixed appliance manufactured by using the method comprises a force applying unit, an immobilizing unit and accessories.
Owner:北京诺亚口腔诊所有限公司

Human-computer cooperative robot tooth-implant method and human-computer cooperative robot tooth-implant system based on augmented reality

A human-computer cooperative robot tooth-implant method based on augmented reality includes the following steps: (1) acquiring data; (2) carrying out three-dimensional reconstruction to obtain an oraltissue model; (3) designing a implanting scheme; (4) designing and manufacturing a positioning marker; (5) generating a manipulator off-line program instruction according to the implanting scheme; (6) allowing a patient to wear the positioning marker, and calibrating the position of a manipulator; (7) carrying out surgical operation by the manipulator according to an instruction, and adjusting according to a real-time micro motion position of a patient; and (8) allow a doctor to observe the correspondence condition between a three-dimensional implanting scheme and the actual position in the patient oral cavity from worn AR spectacles, and interfering adjustment by the man-machine fusion technique. The invention provides the human-computer cooperative robot tooth-implant method and a human-computer cooperative robot system based on augmented reality, wherein the method and the system can realize superposition of the three-dimensional implanting scheme and the patient oral cavity and automatic tracking and positioning, realize surgical operation by a robot and allow the doctor to intervene timely.
Owner:ZHEJIANG UNIV OF TECH

Bleaching compositions and devices having a solid adhesive layer and bleaching gel adjacent thereto

Dental bleaching compositions in the shape of a dental tray or tray-like form include a substantially solid adhesive layer and a dental bleaching gel. A barrier layer may be included on an outer surface of the adhesive layer to form a dental bleaching device. The adhesive layer comprises a substantially solid adhesive composition that has increased adhesiveness to oral tissue when moistened with saliva or water. The adhesive layer is formed from an intermediate composition that is heated to drive off the solvent. Using a bleaching gel separate from the adhesive layer improves the potency and stability of the bleaching agent, as the bleaching gel is not heated like the adhesive layer. The shape of the dental bleaching device facilitates placement of the device over a person's teeth with substantially less manipulation compared to the use of initially flat bleaching strips. The moistened adhesive composition reliably adheres the dental bleaching composition or device against a user's teeth during a bleaching procedure. Because a substantial portion of the adhesive composition remains solid or semi-solid during bleaching, the adhesive composition maintains a substantial portion of its adhesive properties and internal cohesive strength compared to, e.g., a bleaching gel used by itself.
Owner:ULTRADENT PROD INC
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