Abstract: Devices configured for insertion into an oral cavity of a subject for delivery of an agent for a time period are described. The devices are comprised of at least two polymer shells that nest or stack to create a space or gap therebetween. The agent is placed in the gap and is released in a controlled fashion to deliver agent for the time period. Kits comprised of a device and optionally a refill of the agent are also described.

Abstract: A dental implant assembly comprises a base member and an abutment member. The base member is adapted for placement into an opening in a jawbone and comprises elongated vertically parallel side walls coupled with opposing curved end walls which together define an eccentrically shaped external surface and an eccentrically shaped internal cavity. The base member also includes an eccentrically shaped curved lip which couples top edge perimeters of the external surface and the internal cavity to one another. The abutment member is adapted for placement into the eccentrically shaped internal cavity of the base member. Responsive to placement of the abutment member in the eccentrically shaped internal cavity of the base member, a trans-gingival emergence profile is formed between the eccentrically shaped curved lip and a region of the lower portion between the eccentrically shaped curved lip and the shoulder.

Abstract: A shell-like orthodontic appliance includes a shell-like body provided with a cavity accommodating a plurality of maxillary teeth. A sagittal adjustment portion is provided at a lingual side in an anterior region of the shell-like body. The sagittal adjustment portion is configured to adjust a maxillomandibular position relationship while at least to partially offset deformation of the shell-like body caused by occlusion, and the sagittal adjustment portion is at least partially connected to the lingual side in the anterior region of the shell-like body. The sagittal adjustment portion has a geometric structure configured to stabilize a maxillomandibular occlusion relationship and reduce a deformation of the shell-like body caused by occlusion while to adjust positions of teeth in a mandibular anterior region relative to a maxilla upward to target occlusion positions in a sagittal direction.

Abstract: A dental coil spring extension device capable of extending a pitch of the dental coil spring is disclosed. The dental coil spring extension device includes a first grip part, a second grip part, and an extension part. The first grip part grips one coil of a coil spring. The second grip part grips the other coil of the coil spring. The extension part separates the first grip part and the second grip part to expand a distance between the one coil and the other coil. Each of the first grip part and the second grip part includes a recessed portion formed to surround a periphery of each of the one coil and the other coil of the coil spring. Thus, the load deflection rate of the dental coil spring itself may be increased, and the need for additional crimpable stops or arch wire replacement may be eliminated.

Abstract: The present disclosure provides a dental handpiece and a head thereof, and a root canal preparation machine. The head of the dental handpiece includes a head housing; a movement cavity is provided in the head housing; a rotatable movement and a driving gear are provided in the movement cavity; the driving gear is sleeved on one end of the movement, and the movement can move along the axial direction of the driving gear; a reciprocating driving mechanism is further provided in the movement cavity, and the reciprocating driving mechanism is used for driving the movement to perform reciprocating movement along its own axis.

Abstract: A dental treatment apparatus includes a holder, a high-frequency signal generation circuit, a detector, and a control circuit. The holder holds an electrode placed at a dental treatment site. A power supply energizes the electrode with a high-frequency current. A detector detects a current value which energizes the electrode. A control circuit causes, based on the current value detected by detector, the power supply to control a current value of the high-frequency current which energizes the electrode.

Abstract: Provided herein are systems and methods for determining hook and or positioning feature placements during dental treatment planning. A patient's dentition may be scanned and/or segmented. A target tooth may be identified. Hook and or positioning feature placement may be determined based on satisfying manufacturing and clinical constraints. The hook or positioning features can be input into a dental treatment planning system.

Abstract: A system for generating a treatment plan for repositioning a plurality of teeth comprises instructions to receive a digital data set representing the plurality of teeth, and determine a movement trajectory for repositioning, each tooth from an initial position and orientation towards a target position and orientation. The movement trajectory of at least one tooth comprises movement along a plurality of different directions. A movement velocity is determined for repositioning each tooth along the corresponding movement trajectory. The movement velocity is determined independently for each tooth, and the movement velocity for the at least one tooth is determined independently for each direction.

Abstract: The disclosed computer-implemented method for selecting locations of mandibular relocation features (MRFs) on oral appliances may include determining candidate locations for placing an MRF on a first oral appliance for a first stage of mandibular relocation (MR) treatment and determining candidate locations for placing an MRF on a second oral appliance for a second stage. The method may include selecting from the candidate locations for the first stage and the second stage based on decreasing a distance between the selected pair of candidate locations. The method may further include processing multiple MRFs in parallel. The method may also include increasing a number of initial candidate locations. Locations for intermediate stages may be selected based on interpolating between the first and second stages or based on decreasing a distance between the selected pair if the interpolation fails. The intermediate stages may be processed using a binary search or a linear search.

Abstract: A dental implant assembly comprises a base member and an abutment member. The base member is adapted for placement into an opening in a jawbone and comprises elongated vertically parallel side walls coupled with opposing curved end walls which together define an eccentrically shaped external surface and an eccentrically shaped internal cavity. The base member also includes an eccentrically shaped curved lip which couples top edge perimeters of the external surface and the internal cavity to one another. The abutment member is adapted for placement into the eccentrically shaped internal cavity of the base member. Responsive to placement of the abutment member in the eccentrically shaped internal cavity of the base member, a trans-gingival emergence profile is formed between the eccentrically shaped curved lip and a region of the lower portion between the eccentrically shaped curved lip and the shoulder.

Abstract: The present invention is directed to a system of devices and a method for preparing a tooth to receive a restoration. The system includes a dental instrument for removal of portions of a tooth in the mouth of a patent and an overlay for guiding the dental instrument during the step of tooth removal. The overlay is designed for temporary installation into the mouth of the patient to guide the dental instrument to remove tooth material. The overlay has one or more sets of guide walls, with a predetermined configuration capable of contacting one or more guide projections of the dental instrument, and a receptacle capable of receiving and attaching to the dental instrument.

Abstract: An assembly type rod for an occlusal plane taking is presented. An assembly type rod according to one embodiment comprises: a bite rod of which the middle portion thereof is placed between the upper and lower anterior teeth of a patient to obtain information of the frontal occlusal plane parallel to the interpupillary line; and an extension portion which is coupled to the bite rod in the form of a ball-and-socket through a ball-shaped coupling portion and is rotatable in a state of being coupled with the bite rod such that information of a lateral occlusal plane according to Camper's line on both sides can be acquired.

Abstract: An air handling and filtration/treatment system (whether portable of affixed) for the mitigation and management of airborne biological contaminants (either those pre-existing or those that may become generated) that includes a suspended air in-take assembly containing a removable filter; that includes a deflector having ducting leading to a housing assembly that includes a UV sanitizer, a fan assembly and controller; and includes an outflow assembly that includes ducting leading to a position able manifold having a plurality orifices. The manifold and deflector are laterally offset from the housing assembly and vertically aligned with each other. The manifold is positioned to encircle the bioaerosol source.

Abstract: A system for delivering an oral product includes an appliance capable of fitting inside a user's mouth, the appliance having a body that is configured to cover the user's maxillary teeth and a reservoir for receiving the product. The reservoir has at least one port for delivering the product into the user's mouth at a predetermined rate. The reservoir has a first part and a second part, wherein the second part is affixed to the body and the first part is releasably attached to the second part. Opposite ends of the reservoir each include a peg-and-hole connector to releasably attach the first part to the second part.

Abstract: A ceramic dental implant for implantation into a jaw bone extending from an apical end to a coronal end. The implant has a blind bore open towards the coronal end and extends towards the apical end along a central longitudinal axis. The blind bore includes a threaded section having a base surface where a thread protrudes radially inwards. The threaded section includes a main portion, wherein the maximum thread radius remains constant along the portion length and, adjacent to the main portion, a tapered portion where the base surface tapers radially inwards from the maximum thread radius to the minimum thread radius at the apical end of the tapered portion, the tapered portion extending over an axial length greater than the thread pitch, forming a tapered thread having gradual reduction in thread depth, the tapered thread extending over more than one thread turn.

Abstract: A dental mirror with a reference point that includes an adjustable fixed mirror and reference point for endodontic treatment. This tool is attached to the bow of a tooth clamp by a clip and is removable. It enables a practitioners to hold a handpiece with one hand and the suction with the other. Practitioners will have an indirect view of the upper teeth using the mirror that is attached to the bow of the clamp. They can use the reference point if there is no clear point of reference for example in a badly decayed tooth or unclear reference point like in an inclined remaining tooth structure.

Abstract: An oral treatment device and a method of using the same. The oral treatment device includes an intraoral mouthpiece configured for placement into a mouth of a user, which includes a lamp having a top edge and a bottom edge, a plurality of first electromagnetic radiation emitting elements that emit light in a first wavelength when activated, and a plurality of second electromagnetic radiation emitting elements that emit light in a second wavelength when activated. The first electromagnetic radiation emitting elements are positioned along the lamp to emit light onto the user's teeth and the second electromagnetic radiation emitting elements are positioned along the lamp to emit light onto the user's teeth.

Abstract: The present disclosure provides a dental bleaching guide plate, including a first plate and a second plate, wherein the first plate and the second plate are abutted to form an enclosed deep groove structure, the first plate is provided with a guide hole, a spacing between two opposite side surfaces of the first plate and the second plate is greater than an outer diameter of a neck of a tooth, and there is a gap between the side surfaces of the first plate and the second plate and side surfaces of the tooth. The guide plate can be sleeved onto an exterior of a tooth to inhibit a bleaching agent from coming into contact with other teeth. In addition, a range and an amount of applying a bleaching agent can be accurately controlled, partitioned coloration and bleaching can be implemented, and an administration position can be accurately located.

Abstract: An obturation apparatus for prepared root canals incorporates the functionality of an endodontic spreader but with a circular disk located at a fixed distance from a distal tip of the apparatus and regulates the length of bioceramic putty inserted into the prepared root canal. The instrument comes in various sizes to cater to prepared root canals of differing dimensions such that the apparatus must be prefit before the application of the bioceramic putty to the apparatus tip before extending the bioceramic putty to the distal side of the circular disk. The apparatus is then inserted to a desired depth with application of apical pressure leaving the bioceramic putty in place as an apical plug when the apparatus is removed.

Abstract: The present invention relates to a device for driving an endodontic file head of an endodontic device and for operating a remote pump, the device comprising: a gear for the connection with the endodontic file head; a drive shaft for rotating the gear and for rotating at least one magnet; a first cylindrical element surrounding the drive shaft; a rotatable magnet holding means surrounding the first cylindrical element; at least one magnet fixed in the rotatable magnet holding means; a coil surrounding the rotatable magnet holding means; a second cylindrical element surrounding the coil; a central processing unit; an inner encoder on the central processing unit for measuring the velocity of the drive shaft; a transmitter; an antenna for sending a signal to a remote pump; and at least one sleeve interlinked with the drive shaft for moving the drive shaft by a motorized power handle.