This disclosure relates to various systems and methods related to preventative laser-based treatment of a dental tissue; for example, to prevent a patient from forming cavities. In some instances, a laser-based treatment system can generate a laser beam pulse with a fluence profile at a treatment site that results in either an increase in acid resistance of the tissue or removal of carbonate from the tissue, without melting or ablating the tissue. In some instances, the laser-based treatment system can direct the laser beam to various locations within a treatment site according to a temporal and/or spatial pattern, that results in either an increase in acid resistance of the tissue or removal of carbonate from the tissue, without melting or ablating the tissue. Many other systems and techniques for preventative and other laser-based treatment are also described.

Described herein is a dental material applicator system comprising a segmented capsule and handpiece. The capsule separately holds a powder and a liquid such that upon activation in the handpiece by an operator, the powder and liquid are mixed into a paste. The operator then triggers the handpiece so that the mixed paste is extruded.

An image of a dental arch comprising a preparation tooth is generated by an image capture device associated with an augmented reality (AR) display. The image of the dental arch is registered to previous image data associated with the dental arch. A visual overlay associated with a dental prosthetic to be placed on the preparation tooth is generated based on the registering of the image of the dental arch to the previous image data associated with the dental arch. The visual overlay is output to the AR display, wherein the visual overlay is superimposed over a view of the preparation tooth on the AR display.

A portable oral irrigator includes a charging seat assembly, a water container assembly, a housing assembly and a pump assembly. The charging seat assembly includes a charging seat base, a transparent charging seat member on the charging seat base, a first control board in the charging seat base, a first light guide line in the transparent charging seat member, a second light guide line in the charging seat base, a charging seat cover on the transparent charging seat member, and a charging socket projecting out of the charging seat cover. With provision of the charging seat assembly, the water container assembly, the housing assembly and the pump assembly, the pump unit draws water from the water container body and exits the water through the nozzle. The first and second light guide lines and the light guide strip emit light to indicate a current state of the oral irrigator.

This invention is about a root canal activator and the activation method. It belongs to technical field of root canal treatment equipment. The eccentric wheel is connected with a oscillatory needle, which is composed of a needle head, a spherical joint and a connecting rod. The connecting rod is connected through a spherical joint to the ball-shaped slot of the eccentric wheel and therefore, a spherical pair is formulated to allow for a degree of freedom. There is a head cover made of soft rubber mounted at the top end of the outer shell. The oscillatory needle is mounted inside the soft rubber cover through a cylindrical joint, which has formulated a cylindrical pair and allows for five degrees of freedom in total.

A handpiece assembly for a medical device has a handpiece having a handpiece distal portion for receiving an insert assembly including a radiofrequency identifier, an insert antenna and an insert. A handpiece antenna is arranged in the handpiece distal portion. Radiofrequency signal supply means provide radiofrequency signals to the handpiece antenna that communicates with the insert antenna when the insert assembly is inserted in an insertion region in the handpiece distal portion. The handpiece antenna is a loop antenna or segmented ring antenna having at least two segments. A first end of a first segment is connected to a first terminal of the radiofrequency signal supply means, a second end of a last segment is connected to a second terminal of the radiofrequency signal supply means, forming a coil radiating structure generating an electromagnetic field. Each segment has a radiant metal element, with respective inductance, electrically connected to a respective capacitive element. A medical device including a control element, an insert assembly, and the handpiece assembly is also provided.

An insert assembly has an insert having an insert metal tang, and a radiofrequency identifier having a ferromagnetic layer in contact with the insert metal tang and including ferromagnetic material, a dielectric layer in contact with the ferromagnetic layer, an insert antenna in contact with the dielectric layer and having an insert antenna metal element extending along a planar profile for receiving and transmitting electromagnetic fields, and an identification chip operatively connected to the insert antenna for transmitting and receiving information about the insert assembly. The ferromagnetic layer reduces or cancels attenuation and/or distortion phenomena of electromagnetic fields. A transceiver device puts the identification chip in wireless communication with a handpiece antenna. The identification chip avoids protruding from a first or outer side of the planar profile. A part of the identification chip protrudes with a chip portion from a second or inner side of the insert antenna metal element. The chip portion is received in a chip seat.

A dental cleaning appliance includes a handle and a fluid delivery system for delivering a burst of working fluid to the teeth of a user. Part of the fluid delivery system is moveable relative to the handle as the appliance is moved along the teeth of the user. A sensor provides an output which varies with movement of that part of the fluid delivery system relative to the handle. A control circuit actuates the delivery of working fluid to the teeth of the user depending on the output from the sensor.

An oral imaging system and method for acquiring dental impression scans is provided by having one or more imaging strips with illumination elements and imaging sensors that are positioned along the contour of the various surfaces of a dental tray and acquire images of the lips, teeth, and gum regions of a mouth. Fluid channels interconnecting a vacuum source or pressurized air source to openings near the imaging sensors on the dental tray are provided to reduce condensation on the imaging sensors. An extraoral extension may also be provided to acquire images of the exterior region of the lips. Furthermore, two dental trays of the present invention may be stacked together so that the entire mouth may be scanned at one time. A ramp is provided on the lower dental tray in the stacked configuration for acquiring relative jaw positions.

A dental laser treatment system may include a laser source providing a laser beam, and a focusing device to produce a laser beam having a waist. The focal length and waist of the laser beam are selected to achieve a depth of treatment that is at least 5 mm long, and has a power density of at least a minimum power density required to perform a selected treatment on dental tissue. In some instances, the focal length is 25 mm or greater.