Abstract: A mouse as an example of an electronic equipment can be used in medical settings and includes a housing that can be gripped by a hand, a substrate which is arranged in a space in the housing and on which an electronic circuit component for calculating a state of the mouse is mounted, and an optical element (lens) which is arranged in a part of a bottom portion (housing bottom portion) of the housing and through which image light from outside enters. The optical element and the electronic circuit component are connected by a transmission unit capable of transmitting the image light. The substrate is arranged so as to be separated from the housing bottom portion upward in a Z direction by a distance between a lower surface of the housing bottom portion and a lower surface of the electronic circuit component in the Z direction and/or by a distance between an upper surface of the housing bottom portion and a lower surface of the substrate in the Z direction.

Abstract: A wax model of a required coping is produced using CNC machining techniques based on a virtual model of the coping created from digital data obtained from the intraoral cavity. The dental coping is then fabricated from the wax model.

Abstract: An electronic impression tray can be used to obtain three-dimensional and temporal measurements in dentistry. There is a device having optical measurement sensor system, and an electronic system including a central management unit capable of collecting, storing and ordering the data obtained by the sensor systems distributed over all or part of the impression tray. An optical impression of all or part of a dental arch can be obtained with a single or multiple impressions. The tray includes a part having the shape of all or part of a dental arch, and the part can change by virtue of its ability to deform and/or a structure formed by multiple elements that are hinged to one another and/or reversibly assembled and secured to one another, such as to provide the optimal shape.

Abstract: A dental tray molding kit for making a custom dental tray includes a generic tray, a thermoformable member removably insertable into the generic tray and a deformable spacer member placeable onto the thermoformable material and bitable by the user upon placement of the spacer member onto the thermoformable member in the user's mouth. The generic tray may be a rigid carrier tray and the kit may include a partially deformable member placed between the rigid carrier tray and the thermoformable member. A method for dental tray molding includes providing a generic tray, heating a thermoformable member until sufficiently pliable, placing the thermoformable member over the generic tray, placing a deformable spacer member over the thermoformable member, applying a biting force from a user onto the thermoformable member through the deformable spacer member, cooling the thermoformable member and separating the thermoformable member, whereby the thermoformable member forms a custom dental tray.

Abstract: Dental systems and methods related to impressionless dental modeling. A dental modeling system includes a dental model base and a mounting plate. The dental model base includes a plate support surface and a plurality of pin receiving apertures formed in the support surface. The mounting plate includes a plate portion positioned on the plate support surface and a plurality of pins extending into the pin receiving apertures to provide removable attachment of the mounting plate to the dental model base. The plate portion includes a model support surface configured to support a model of a person's teeth. The model may be formed directly on the model support surface using an impressionless technique. The model may be formed separately using an impressionless technique and then bonded to the model support surface.

Abstract: There are disclosed an apparatus for assembling a 3D model including a key input unit configured to generate a variety of key inputs for 3D model assembling or key data based on touch input on a screen; a control unit configured to drive an application to implement 3D model assembling based on the key input from the key input unit; a 3D model unit configured to provide a menu screen for 3D model assembling, when driven by the control unit, to display a screen of parts for a 3D model selected as an assembling object based on the touch or key input on the menu screen and to assemble parts selected from the part screen in successive steps to finish the 3D model; and a display unit configured to display successive screens based on the 3D model assembling performed by the 3D model unit.

Abstract: A chop saw, grinding wheel, or like apparatus is disclosed herein also incorporated to an easily portable dust collection system. In a preferred embodiment, a worktable is provided with a center slot for receiving a circular saw blade. A negative pressure and resulting air flow is provided at the center slot to capture particulate matter as a byproduct of cutting the workpiece. Side slots are also disclosed to assist in particulate collection. A unique filter chamber having a cylindrical filter is additionally provided to remove dust from air and discharge the filtered air at a lateral side of the apparatus. A filter cleaning knob is additionally disclosed to assist in cleaning the filter. Of the beneficial aspects of the chop saw with dust collection system is its portability being one integral unit and the dust filter being easily cleaned and maintained.

Abstract: A jaw-strengthening device has a first receiver that receives a first row of teeth having first and second molar sections, a first air chamber within the first receiver positioned in a first molar section of the first receiver, a second air chamber within the first receiver positioned in a second molar section of the first receiver, and an egress valve, that permits egress and prevents ingress of air, in communication with the first and second air chambers, a second receiver that receives a second row of teeth having first and second molar sections, a third air chamber within the second receiver positioned in a first molar section of the second receiver, a fourth air chamber within the second receiver positioned in a second molar section of the second receiver, and an ingress valve in communication with the third and fourth air chambers.

Abstract: A multifunctional diagnostic tray configured to clasp an oral structure when positioned in a mouth. The tray may be digitally designed from surface scan data of the mouth and manufactured. The tray provides a temporary positioning reference location that may be viewed in a tomography scan data set. The tray may be used to orient and verify the tomography scan data set and the surface scan data set to create a combined master data file that may be used to determine the appropriate location for a dental implant or other dental procedure.

Abstract: A device for adsorption treatment of a fluid or fluid stream, comprising a container for receiving adsorber material, wherein the container has a fluid inlet opening and a fluid outlet opening, and two fluid connection devices, wherein one of the fluid connection devices is provided at the fluid inlet opening and the other one of the fluid connection devices is provided at the fluid outlet opening, wherein the fluid connection devices are locked in a fluid-tight manner and are designed in such a way that they can each be connected to a fluid line connector and unlocked and, if they are connected to the respective fluid line connector they can be unlocked or are unlocked.

Abstract: A wax model of a required coping is produced using CNC machining techniques based on a virtual model of the coping created from digital data obtained from the intraoral cavity. The dental coping is then fabricated from the wax model.

Abstract: Centrifugal deflection device intended to be fitted to a surgical or dental handpiece to prevent the penetration of foreign matter that results from an operation, the centrifugal deflection device including a ring coupled in rotation either directly or via a tool shank to a drive shaft of the handpiece. This device is characterized in that the ring is covered by a sleeve secured to the front end of the body of the handpiece and which, with the ring, delimits an ejection chamber. The ejection chamber includes an inlet that communicates with a rear area of the handpiece and an outlet that communicates with the external environment, the ring having a first diameter at the outlet of the ejection chamber and a second diameter at the inlet of the ejection chamber, the first diameter of the ring being larger than the second diameter of the ring.

Abstract: A method for displaying live video of a tooth identifies a tooth tissue region in a viewable image frame obtained from a video stream and processes pixel data within the tooth tissue region to identify a suspected caries site. Intensity values for pixels that correspond to the suspected caries site are modified and a highlighted viewable image frame is formed as a combination of the modified intensity values corresponding to the suspected caries site and other pixel values in the viewable image frame. The highlighted viewable image frame is displayed in video form.

Abstract: A dental treatment apparatus is disclosed that may include a PTFE strip and at least one applicator tab attached to the PTFE strip wherein the applicator tab can be pulled away from the PTFE strip under the discretion of an operator. The applicator tab may comprise at least one adhesive surface limited to an area of the application tab which is used for attaching the application tab to the PTFE strip. The PTFE strip and the applicator tab may comprise varying shapes, widths, and lengths based on its desired application.

Abstract: A dental mouthpiece is provided that may be attached to a high-suction dental adapter for the purpose of assisting the dental staff during dental procedures through chair-side, hands-free suction, and isolation. Such a mouthpiece may comprise a main body portion, a cheek retractor portion, and a suction connector portion. In some embodiments, the main body portion, cheek retractor portion, and suction connector portion (and sub-portions thereof) may be molded in one piece, preferably by injection molding. In an exemplary embodiment, the mouthpiece may be made of a material that is flexible, translucent, conducive to injection molding, high heat-resistant, and autoclavable. Such a material may include silicone. Because the mouthpiece may be made of a high heat-resistant and autoclavable material, such a mouthpiece may be reusable.

Abstract: A dental mouthpiece is provided that may be attached to a high-suction dental adapter for the purpose of assisting the dental staff during dental procedures through chair-side, hands-free suction, and isolation. Such a mouthpiece may comprise a main body portion, a cheek retractor portion, and a suction connector portion. In some embodiments, the main body portion, cheek retractor portion, and suction connector portion (and sub-portions thereof) may be molded in one piece, preferably by injection molding. In an exemplary embodiment, the mouthpiece may be made of a material that is flexible, translucent, conducive to injection molding, high heat-resistant, and autoclavable. Such a material may include silicone. Because the mouthpiece may be made of a high heat-resistant and autoclavable material, such a mouthpiece may be reusable.

Abstract: A dental mouthpiece is provided that may be attached to a high-suction dental adapter for the purpose of assisting the dental staff during dental procedures through chair-side, hands-free suction, and isolation. Such a mouthpiece may comprise a main body portion, a cheek retractor portion, and a suction connector portion. In some embodiments, the main body portion, cheek retractor portion, and suction connector portion (and sub-portions thereof) may be molded in one piece, preferably by injection molding. In an exemplary embodiment, the mouthpiece may be made of a material that is flexible, translucent, conducive to injection molding, high heat-resistant, and autoclavable. Such a material may include silicone. Because the mouthpiece may be made of a high heat-resistant and autoclavable material, such a mouthpiece may be reusable.

Abstract: A dental mouthpiece is provided that may be attached to a high-suction dental adapter for the purpose of assisting the dental staff during dental procedures through chair-side, hands-free suction, and isolation. Such a mouthpiece may comprise a main body portion, a cheek retractor portion, and a suction connector portion. In some embodiments, the main body portion, cheek retractor portion, and suction connector portion (and sub-portions thereof) may be molded in one piece, preferably by injection molding. In an exemplary embodiment, the mouthpiece may be made of a material that is flexible, translucent, conducive to injection molding, high heat-resistant, and autoclavable. Such a material may include silicone. Because the mouthpiece may be made of a high heat-resistant and autoclavable material, such a mouthpiece may be reusable.

Abstract: The systems and methods disclosed herein employ a combination of digital three-dimensional modeling and rapid fabrication technologies to provide pre-indexed, pre-registered, and/or precut components for articulated dental models. Dental articulators and components of dental models as described herein use a positioning key to encode positional information for components of the dental model, and/or a reference grid on mounting surfaces to enforce local accuracy of fabricated parts against a fixed reference array.

Abstract: The present invention relates to an apparatus used in dental care environment and to a method for controlling a device belonging to the apparatus, especially to hygienic and ergonomic control of a device belonging to the apparatus in connection with dental care work. The invention includes at least one device (2, 3) used in connection with dental care work, such as a dental unit, a patient chair, a dental x-ray device and/or a computer and at least one user interface (1) for sending control commands to at least one of said devices (2, 3) used in connection with dental care work, whereby a fixed or a detachable means (4) is arranged in said user interface (1) for detachably connecting it to a person working in the dental care environment, to his/her clothing or to the dental unit, or the user interface is arranged as a fixed or a detachable part of clothing arranged to be separately dressed on the person in question or of some other structure to be dressed on.

Abstract: Disclosed is a marker for image information matching. A marker for image information matching in accordance with an embodiment of the present invention is installed in an oral cavity of a patient to provide a reference point for obtaining image information on an oral tissue of the patient.

Abstract: Device for taking three-dimensional and temporal optical imprints in color, including a three-dimensional dental imaging device that does not employ structured light projection. The device includes a stereo camera having at least two CCD or CMOS color sensors in preset positions, an optical system of fixed and preset focal length, an LED lighting system, and an electronic system located behind or near the sensor, controlling the latter but also the LEDs illuminating the imprint capture region. The system includes a central processing unit and a card for controlling said LEDs. The sensors are distributed over all or part of a dental arch, being placed in a sort of optical impression tray allowing a complete image of the arch to be captured in a single exposure.

Abstract: The device for infiltration of approximal tooth surfaces, with a flexible planar element and with a holder into which the planar element is clamped, is characterized in that the planar element is a liquid-impermeable plastic film which has a surface area for taking up a liquid to be used for treatment, and in that the holder is a bow-shaped element with a web and two lateral arms which extend from the latter and are arranged in an arc-shape or U-shape, to which the plastic film is connected in a liquid-impermeable manner.

Abstract: A biocompatible material, wherein at least a part of a surface of the biocompatible material is characterized by a micro or nano-meter scale topographical structure comprising a plurality of features where the structure is selected to promote the growth of undifferentiated pluripotent stem cells or serve to promote the uniform differentiated growth of stem cells. Furthermore, a biocompatible material is provided having a surface structure and composition that affects a cellular function, in particular cellular functions related to gene induction, cell differentiation and the formation of bone tissue in vivo and ex-vivo.

Abstract: A compliance monitoring system (40) for an intraoral appliance comprises a power source (460), a detector (410) for detecting when the intraoral appliance is positioned in the mouth for use, a recorder (430) configured to record measurement data, and a transponder (440) configured to communicate the measurement data. The monitoring system is adjustable based on a particular property of a patient or a group of patients.

Abstract: Fluid distributions implement to evenly wear down dental decay, diseased tissue, or undesired dentin in oral applications with live patients. The dentist has adjustable control over both the intensity and distribution field of a low-pressure sterile fluid, which may contain a pre-determined amount of reductive elements held in suspension. The implement must be supplied with a source of power and feed line of the chosen fluid. When switched on, it delivers one or a plurality of rapid bursts of varying impact strength in such a quick manner that the entire impact zone receives an even distribution of the liquid bursts. The desired result is the severe reduction in cratering, gouging, and non-symmetrical damage introduced by implements of the prior art such as drills, jet-stream fluid delivery systems, and tissue sanders with less danger of structural impairment to the patient in these cases of comparison.

Abstract: The present invention relates to a new and inventive composition for implant cleaning and/or debridement of hard surfaces in the oral cavity, which comprises optimally activated nanoparticles of TiO2, having a mean particle diameter (D50) of about 10-100 nm at a concentration between 0.5-500 g/L, and H2O2, at a concentration of at the most 7.5% by volume, said composition being antibacterial, without causing microbial resistance, and anti-inflammatory, and wherein said composition further comprises solid microparticles, having a mean particle diameter (D50) of about 100-200 ?m at a concentration between 0.5-300 g/L, for improved mechanical debridement and/or cleaning of rough surfaces in the oral cavity and/or on an implant.

Abstract: The systems and methods disclosed herein employ a combination of digital three-dimensional modeling and rapid fabrication technologies to provide pre-indexed, pre-registered, and/or precut components for articulated dental models. Dental articulators and components of dental models as described herein use a positioning key to encode positional information for components of the dental model, and/or a reference grid on mounting surfaces to enforce local accuracy of fabricated parts against a fixed reference array.

Abstract: A device for operation of a surgical or dental drive unit includes a control valve attached to a drive unit to control a flow rate of a compressed fluid flowing from a compressed fluid source to the drive unit. The control valve includes (a) a first control arrangement controlling a rate of flow of the compressed fluid through the control valve; (b) a control switch; and (c) a control sleeve controlled by the control switch to axially move along a longitudinal axis of the drive unit between a first configuration in which the control valve is locked and closed to fluid flow and a second configuration in which the control valve is unlocked and the first control arrangement controls the rate of flow therethrough.

Abstract: A device for dispensing a material comprises a piston for extruding the material. The device further has a spindle and a cooperating nut that are rotatable relative to each other to displace the piston axially to a rotation axis of the spindle. The device is adapted for rotationally driving the spindle and the nut individually. The invention is advantageous in that it helps in providing a relatively compact and inexpensive device.

Abstract: A therapeutic dental mouthpiece-forming substrate includes: a flexible board on which an electrical component used for dental arch treatment is mounted; and a thermosoftening resin sheet in which the flexible board is embedded in an airtight or watertight state.

Abstract: An ultrasonic orthodontal monitoring system and method of use is described herein, featuring an intraoral ultrasonic transducer and an ultrasonic monitoring apparatus configured to connect to the intraoral ultrasonic transducer, generate and send electrical pulse signals to the intraoral ultrasonic transducer, receive measured signals from the intraoral ultrasonic transducer, and generate time-of-flight and relative density based on the measured signals. This invention will permit routine measurements to be made of osseointegration by the patient's dentist during regular maintenance appointments, thereby reducing the risk of a failed implant, patient discomfort, and inconvenience. As a diagnostic tool, it can also aid in the diagnosis and treatment of progressive periodontal disease, peri-implantitis, and osteoporosis in edentulous patients.

Abstract: The present invention relates to a dental firing furnace having a firing space and at least one carrier for dental material, in particular a muffle, which can be loaded into the firing space, and, in particular, a pressing device for pressing a ceramic blank inserted in the muffle, at least one physical variable of the firing space and/or of the carrier and/or of the muffle and/or of the ceramic blank being detected. A processing program of the dental furnace (10) that can be set is based on the detected physical variable.

Abstract: The hands-free dental appliance includes upper and lower tray members (12, 14) for receiving the teeth of the user, the tray members having teeth contact members such as bristles. A power assembly (28) moves the tray member in a reciprocal manner, resulting in cleaning of the surfaces of the teeth by the bristles. A grounding system (30) with bite portions (32, 34, 36) for biting contact whereby the user's teeth grounds the appliance to the user's mouth structure, reacting both static and dynamic forces, the grounding system being either separate from the tray members or flexibly connected to the tray members, allowing the tray members to move and clean the teeth without the user having to hold or otherwise manipulate the appliance.

Abstract: Method for expanding bone crest (1) in order to receive the installation of a final dental implant (4), where the bone crest (1) is expanded using a implant-expander, in other words, a biocompatible and osteoconductive piece that has an expander function. The use of an implant-expander (3) to widen the bone crest (1) has the important effect of said implant-expander acting as a support to the bone and therefore helping to consolidate the fracture of the bone crest (1) and the formation of bone around said implant-expander. The bone generated around the implant-expander (3) is therefore of a high quality. The invention also contemplates the optional correction of the angulation of the alveolus during the widening process, so that the final dental implant (4) and the corresponding dental prosthesis are adequately oriented. It is also an object of the invention to provide a specific design for the implant-expander (3).

Abstract: A dental-plaque detection system and dental-plaque detection method which are excellent in the detection accuracy of dental plaques and also capable of improving the situation to stain sites other than dental plaques (such as interdental parts and gums) are provided. The dental-plaque detection system includes a dental-plaque staining agent, which contains at least one selected from yellow pigment of beni-koji, turmeric extracts, and curcumin; and a light-emitting apparatus, which outputs light having a wavelength within a range of 250 to 500 nm to an object in the oral cavity where the dental-plaque staining agent is attached. The dental-plaque detection method includes attaching a dental-plaque staining agent, which contains at least one selected from yellow pigment of beni-koji, turmeric extracts, and curcumin onto an object in the oral cavity; and thereafter irradiating light having a wavelength within a range of 250 to 500 nm onto the object.

Abstract: Biodegradable stents and methods for selectively guided tissue regeneration in treating a periodontal defect adjacent to a root of a tooth are provided. The biodegradable stents and methods comprise a coronal portion and a transverse portion or shelf, which reduce unwanted migration of gingival epithelium, gingival connective tissue, and soft tissue and enable the cementum and periodontal ligament cells to re-establish the periodontal ligament in a proper sequence resulting in a new periodontal attachment.

Abstract: Devices and methods are provided for maintaining space to treat a periodontal defect adjacent to a tooth, the devices and methods comprise a supporting structure comprising a pin, or suture or mesh having a body configured to extend over the periodontal defect and hold gingival tissue above the defect, the supporting structure having a first end configured to retain the supporting structure against at least a portion of the tooth and a second end configured to be attached or implanted in or on at least a portion of bone adjacent to the periodontal defect. The devices and methods provided maintain space between at least gingival tissue and the periodontal ligament and avoid compression of any bone replacement material in the defect. In some embodiments, the devices and methods provided can be removed from the healed periodontal defect without the need to cut into healed soft tissue.

Abstract: A non-custom, dental tray device includes a moisture-resistant barrier layer having a labial-buccal wall, a lingual wall, and a bottom wall. The dental tray device includes at least one of the following structural features to enhance the fit of the device; (1) the bottom wall includes an abrupt reduction of width at a location corresponding to where the first bicuspid meets the canine; (2) a bottom wall in the posterior region having a width that is equal to or less than the width of the bottom wall in the anterior region, with no lingual wall in the posterior region; or (3) a transition portion between the bottom wall and either the labial-buccal wall or the lingual wall has a larger radius of curvature as compared to a radius of curvature at a transition portion between the bottom wall the other of the labial-buccal wall and the lingual wall.

Abstract: Disclosed herein are teeth whitening compositions generally including an oxidizing agent (e.g., a peroxide), and an activating agent that has an emission wavelength between about 400 nm and about 570 nm (e.g., Eosin B). Methods of employing these compositions to whiten teeth, methods of making these compositions and kits that include some or part of the composition ingredients, are also described.

Abstract: A method comprises creating a predetermined pattern of treatment microzones in oral tissue affected by a condition, applying energy of predetermined characteristics to the soft tissue through a tip being limited by at least one dimensional feature of the oral tissue. The application of energy to the oral tissue after creating the predetermined pattern of treatment microzones in the oral soft tissue is terminated. A type of the energy and the characteristics of the predetermined pattern of treatment microzones are defined by the condition in the soft tissue. The condition in the oral tissue can be a gingival recession, gingivitis, periodontal disease, xerostomia, black triangle disease, and interdental/interimplant papilla deficiencies. The oral tissue can be oral soft tissue, such as oral mucosa soft tissue or a gingival soft tissue.

Abstract: The present invention relates generally to the design and optimal placement of transmitting and receiving directional antennas, a priori, as used in intra-oral to extra-oral (or visa versa) wireless electronic systems regardless of the type and purpose of the data transmitted between the antennas (intra-oral and extra-oral). Systems related to the invention transmit data via electromagnetic radio waves or through an inductive loop coupling such as in stimulating the human hearing nerve (inner ear) via dental bone conduction pathway when operating in “receive mode”. “Send mode” systems related to the invention transmit non-acoustic information or voice data from inside the mouth to a receiver located outside the mouth.

Abstract: The mouthpiece (10) includes receiving portions for receiving teeth from the upper and lower jaws. The teeth receiving portions includes two side portions (26, 28) which are joined by flexible members (32, 34) to a front portion (30). The two side portions move laterally relative to the front portion by the flexible members to accommodate a variety of dental arch configurations.

Abstract: A teeth whitening system includes a head unit adapted to be worn on a user's head, a light housing supported by the head unit proximate to the user's mouth, the light housing including a light source, and a mouth piece including a tray portion adapted to surround the user's teeth. At least one of the light housing or the mouth piece includes a receptacle, and the other of the light housing or the mouth piece includes a plug portion adapted to engage in the receptacle. The present application also provides an apparatus for whitening teeth, a mouth piece for use in whitening teeth, and a method of whitening teeth.

Abstract: In a method and apparatus for detecting a crack in a human tooth, especially one covered by a restoration, such as a crown, the approach is to stress the suspect tooth and, by means of acoustic emission techniques, analyze the characteristics of the resultant acoustic emission from the tooth. To aid the identification of a crack from the acoustic emission signal, a baseline may be obtained by performing this procedure at a time when the tooth is known not be cracked, e.g., when a restoration is placed on it. This baseline acoustic emission signature is recorded. This procedure is repeated at intervals. The subsequent measurements are compared with the baseline to identify changes that indicate the initiation and growth of a crack. The invention includes apparatus for implementing the method. The approach is to integrate the acoustic emission pulser and sensor into commercially available dental instruments, e.g., a tooth polisher and a water syringe.

Abstract: A method for creating a custom dental tray is made by filling a dental tray with an elastomer material, obtaining a first impression of a patient's teeth in the elastomer material by pressing the elastomer-filled dental tray against the patient's teeth, heating a polymer sheeting, and placing the heated polymer sheeting over the first impression in the elastomer-filled dental tray. In addition, the custom dental tray is made by obtaining a second impression of the patient's teeth in the polymer sheeting by pressing the elastomer-filled dental tray having the first impression and the heated sheeting over the patient's teeth and removing the polymer sheeting from the elastomer-filled dental tray.

Abstract: The systems and methods disclosed herein provide real time display of three-dimensional dental data acquired intraorally from a dental patient.

Abstract: Provided is an assistant apparatus for oral treatment including dental treatment and a unit chair equipped with the same. The assistant apparatus includes an oral cavity insertion member positioned in the oral cavity in front of the uvula of a patient, or preferably, on the soft palate, such that washing liquid or saliva is prevented from entering a patient's throat during oral treatment. Therefore, it is possible to prevent patient discomfort and interruption of treatment. Further, medical instruments/components are prevented from entering the throat and injuring the pharynx.

Abstract: A dental prosthesis removal tool comprising a handle portion and a top portion, the top portion comprising a head portion and a beak portion. The beak portion is configured to engage both a maxillary dental prosthesis and a mandibular dental prosthesis without the tool needing to be reoriented. The dental prosthesis removal tool makes it possible for a dental prosthesis wearer to remove dental prostheses without the user placing his or her fingers inside of his or her mouth. The dental prosthesis removal tool also allows a denture wearer to remove dental prostheses without bending, work hardening, or breaking metal clasps contained in some dental prostheses. The dental prosthesis removal tool further allows a denture wearer to more comfortably remove his or her dental prosthesis, promoting better patient compliance with maintenance procedures and oral hygiene.

Abstract: A liquid injection apparatus for lifting a maxillary sinus mucous membrane includes a passageway longitudinally extending through inside the apparatus; a connecting pipe formed at a rear portion to connect with a liquid supply apparatus; and an injection pipe 16 formed in a front portion, for being inserted into an implant hole extending to a bottom of a mucous membrane of a maxillary sinus, with a distal end of the injection pipe 16 spaced apart from the mucous membrane by a predetermined distance. The injection pipe is structured to inject liquid into the implant hole while closing the implant hole. The liquid injection apparatus can more easily lift the maxillary sinus mucous membrane without damaging the same by applying uniform pressure to the maxillary sinus mucous membrane when the maxillary sinus mucous membrane is being lifted.