In one embodiment, a method may include retrieving, via a processor, a fundamental frequency of a cylinder type from a memory communicatively coupled to the processor, receiving, via the processor, a first signal from a first knock sensor disposed on a cylinder. The cylinder is disposed in an engine. The method may also include deriving whether a number of amplitudes of the first signal at the fundamental frequency and one or more harmonic frequencies exceed an undesired installation threshold value, and identifying an asymmetric piston as having an undesired installation if the undesired installation threshold value exceeds the number of amplitudes of the first signal and the one or more harmonic frequencies.

A drive mechanism for a device with two operating parts, which are connected so as to be pivotally displaceable relative to each other between a first position and a second position about a common axis of rotation. The drive mechanism has a driving mechanism such that a movement from the first position to the second position can be initiated initially by a slight movement and the additional movement is then effected automatically through spring force (F) until the second position has been reached. The movement out of the first position into the second position is possible in either a clockwise and counterclockwise movement. The driving mechanism comprises a driven part, one operating part and two drives that are in the form of a force storing device The force storing devices interact with the driven part in opposing directions in such a manner that only the one for storing device is in driving connection with the driven part while the other force storing device is retained in its starting position.

The invention relates to a method for determining the fatigue capital of a cable supporting a civil engineering structure, the method including: a measuring step (S1, S2) during which the normal tensile stress in the cable and the bending stress in the cable are measured in a synchronized manner so as to obtain the compound stress in the cable; a counting step (S3) during which a count of the number of stress cycles, depending on the amplitude of the stress, is carried out from the measured compound stresses; and a step (S4) of assessing the fatigue capital of the cable during which the fatigue capital of the cable is determined by comparing the count, carried out in the counting step, with a pre-set Wohler curve for the cable.

A control and measurement system for a coriolis flowmeter having a flowtube, a driver adapted to vibrate the flowtube, and a pair of sensors adapted to generate signals indicative of movement of the flowtube when it is being vibrated by the driver, wherein the sensors are positioned relative to one another so the signals from the sensors are indicative of a mass flow rate of fluid through the flowtube. A digital drive signal generator is adapted to generate a variable digital drive signal for controlling operation of the driver. The digital drive signal generator can be adapted to cause the driver to resist motion of the flowtube during a first time period and amplify motion of the flowtube during a second time period. The digital drive signal generator can also be adapted to initiate motion of the flowtube by sending one or more square wave signals to the driver.

The present disclosure relates to a grouting and welding combined connection joint and an offshore installation method thereof, characterized in that: it comprises a set of grouting systems disposed inside of the annular space formed by an inner shell of the central pore canal of a column with large cross section and an outer wall of a column with small cross section, as well as a group of brackets welded on a top deck of a column with small cross section and an inner shell of the central pore canal of the column with large cross section. The grouting and welding combined connection joint provided by the present disclosure has advantages of being able to adapt to the connection of different dimensions of columns, and having simple offshore installation, highly reliable structural safety and low cost.

A method and apparatus for underwater pelletizing and subsequent drying of crystallizing polymers to crystallize the polymer pellets with out subsequent heating is shown in FIG. 5. High velocity air or other inert gas is injected into the water and pellet slurry line (120) toward the dryer near the pelletizer exit (102) at a flow rate from about 100 to about 175 m3/hour, or more. Such high-speed air movement forms a vapor mist with the water and significantly increases th speed of the pellets into and out of the dryer such that the polymer pellets leave the dryer with sufficient latent heat to cause self-crystallization within the pellets. A valve mechanism in the slurry line (150) after the gas injection further regulates the pellet residence time and a vibrating conveyor after the dryer helps the pellets to achieve the desired level of crystallinity and to avoid agglomeration.

Bimetallic alloys prepared in a ball milling process, such as iron nickel (FeNi), iron palladium (FePd), and magnesium palladium (MgPd) provide in situ catalyst system for remediating and degrading nitro explosive compounds. Specifically, munitions, such as, 2,4,6-trinitrotoluene (TNT), cyclo-1,3,5-trimethylene-2,4,6-trinitramine (RDX), nitrocellulose and nitroglycerine that have become contaminants in groundwater, soil, and other structures are treated on site to remediate explosive contamination.

The present invention relates to a method for recrystallizing fine spherical cyclotrimethylenetrinitramine (Research Department Explosive, hereinafter, referred to as “RDX”) particles, and the method for recrystallizing fine spherical RDX particles according to the present invention may include (a) introducing a powder material containing RDX into a container, (b) introducing a dimethylether compressed gas into the container and dissolving the RDX to form a RDX solution, (c) releasing and decompressing the RDX solution into atmospheric pressure to form crystallized RDX particles, and (d) separating and collecting the RDX particles.

A munition is described including a reactive fragment having an energetic material dispersed in a metallic binder material. A method is also described including forming a energetic material; combining the energetic material with a metallic binder material to form a mixture; and shaping the mixture to form a reactive fragment. The munition may be in the form of a warhead, and the reactive fragment may be contained within a casing of the warhead.

Provided is a fuel of catalytic metal-containing ionic liquid (MCIL) and an IL, to spur hypergolic ignition of such liquids upon contact with an oxidizer to define a hypergolic bipropellant.

A lead-free pyrotechnic and primary explosive compositions including metal iodates as an oxidizer in nanocomposite energetic compositions including metal powder fuel.

An adhesive may bond a plastic bonded explosive to a metal surface. The adhesive may include a mixture of hydroxyl-terminated polybutadiene (HTPB) and isophorone di-isocyanate (IPDI) in a weight ratio in the range of about 5 to 1 to about 10 to 1. The adhesive may include a solvent and/or a catalyst.

This invention relates to an apparatus for explosively dispersing particles of reactive metals into the atmosphere to form a fuel-air explosive. Also, this invention relates to a composition, which enhances the performance of metal augmented charge (MAC) devices. The metal augmented charge (MAC) includes flaked aluminum powder and polytetrafluorethylene. The MAC is pressed into solid billets. A preferred embodiment of the present invention involves a system with heavy-walled warhead, which comprises a canister and a cylinder of MAC disposed in the canister, so that said cylinder is in contact with the interior wall of the canister. Further, a high explosive is disposed in the cylinder with a fuze in direct contact with the high explosive, in such a way that the fuze detonates the high explosive.

A gas generating pyrotechnic composition that in addition to a primary fuel component and a primary oxidizer component includes critical relative amounts of elemental carbon and cupric oxide. Also provided are associated methods for producing an inflation gas for an occupant restraint system of a motor vehicle.

Device for taking back empty containers, in particular plastic bottles and metal cans, with a housing which has apparatuses for processing inserted empty containers, an intake chute accessible from the outside that receives empty containers as bulk material and a bottom sloping downward in direction of intake chute. Device is provided that prevents or impedes insertion of excessively large objects into device. Device provides almost unimpeded insertion of empty containers as bulk material into intake chute, and simultaneously prevents that excessively large objects can enter into the device. The bottom of intake chute has a plurality of grooves arranged side by side and running in the intake direction, the grooves flowing into a passage opening leading to the device and whose cross-section is dimensioned in such a manner that empty containers aligned longitudinally in the intake direction can pass unimpeded through the grooves.

A retractable stock guide has a stationary guide rail on which a retractable guide cap is operably supported. The guide rail and cap have two through holes at opposite ends through which two mounting studs extend to attach the stock guide to an associated die member. The holes in the guide cap are ovate, and the heads of the mounting studs are tapered, whereby tightening of the mounting stud shifts the guide cap relative to the guide rail from an aligned, retracted load/unload condition, to an inwardly protruding, extended run condition, wherein the stock strip is slidingly captured between two like stock guides and the mounting surface of the die. Two ball bearing guides can be substituted for the stationary guide rail.

A process of forming the wall of the mouth of a cylindrical, metal container or packaging from a tubular ring that may or may not be molded that has to accommodate a sealing lid equipped with an elastic seal secured by a vacuum created in the container is characterized essentially by the use of a single element, the head carrying out the deformation of the internal diameter of the container by expansion to produce a bead together and simultaneously with a contraction that produces shrinkage above the bead of the mouth, the head comprising an expansible stationary part and a moving part that turns around the stationary part, the parts of the head being coaxial, which has the effect of compressing the metal and hardening it by organizing the metal molecules under two simultaneous stresses, which hardens the packaging and allows it to withstand the vacuum applied thereto.

A method for forming a piece of a sheet metal is performed by positioning a consumable body, made of metal, proximate to the piece of the sheet metal. The consumable body is rapidly vaporized, and the gas pressure generated thereby is directed into the piece of the sheet metal. This results in acceleration of the piece of sheet metal, and it is collided into a stationary body at a velocity, generally in excess of 200 m/s. Depending upon the type of stationary body, the piece of sheet metal is deformed into a predetermined shape or is welded onto the stationary body. The vaporization is accomplished by passing a high current of electricity into the consumable body. The effect of the vaporized metal may be augmented by additional components in the consumable body.

A hydroforming method for metal produces hardware having a throat in only one side and having approximately right-angled corners without causing thinning and breakage. The method includes using a working fluid to exert a liquid pressure on a metal embryo and cooperating with a push rod of a hydroforming mold to supply material from the lower edge, forcing the side sheet metals to bulge. Furthermore, by using the hydroforming mold to provide a downwardly pressing active force on the metal embryo, under feeding of the downwardly pressing active force cooperating with continuous liquid pressure, the metal embryo deforms and bulges such that each corner of the metal embryo and the wall corners of the die cavity of the hydroforming mold have approximately the same angles. Hardware, every angle of which approximates a right angle, can be obtained after removing the hydroforming mold. This method can also be used to obtain a metal box.

A method of processing an alloy workpiece to reduce thermal cracking may comprise spraying a metallic coating material onto at least a portion of a surface of the alloy workpiece to form a surface coating metallurgically bonded to the alloy workpiece. The surface coating may be more ductile than the alloy workpiece and reduces heat loss from the alloy workpiece.

A digital manufacturing system comprises a build chamber, a build platform disposed within the build chamber, at least one extrusion line configured to heat a metal-based alloy up to a temperature between solidus and liquidus temperatures of the metal-based alloy, a deposition head disposed within the build chamber and configured to deposit the heated metal-based alloy onto the build platform in a predetermined pattern, an umbilical having a first end located outside of the build chamber and a second end connected to the deposition head, and at least one gantry assembly configured to cause relative motion between the build platform and the deposition head within the build chamber, where the at least one gantry assembly comprises a motor disposed outside of the build chamber.

A hydraulically installed tube plug with or without O.D surface enhancements and plug installation tooling, high pressure fluid system and method. The invention stops leaks in tubes with a plug that utilizes controlled high pressure fluid within the plug itself to radially expand the plug in place. Other plugs and plugging systems rely on mechanical methods for setting the plugs in the tubes with little or no control on the radial pressure applied to the tube. This lack of radial pressure control can result in a tubesheet ligament being over stressed (plastically deformed) or not enough pressure applied to stop the leak. The plug high pressure expansion tooling is designed with built in safety components that allow high pressure hydraulic expansion methods to be used safely in blind holes. The high pressure fluid system's design allows it to be used in hazardous environments.

Method for manufacturing a metal cord with three concentric layers including a first layer of diameter dc made up of M wire(s) of diameter d1, around which layer are wound together as a helix at a pitch p2, as a second layer, N wires of diameter d2, around which are wound as a helix at pitch p3, as a third layer, P wires of diameter d3. The N wires of the second layer are assembled around the layer to form, at a point called “assembling point”, an intermediate cord called “core strand” of M+N construction; upstream and/or downstream of the assembling point, the layer and/or the core strand is sheathed with a rubber or rubber composition by passing through at least one extrusion head; then the P wires of the third layer are assembled around the core strand to form a cord of M+N+P construction thus rubberized from the inside.

Bucket teeth having a metallurgically bonded wear-resistant coating and methods for forming the coated bucket teeth are disclosed. The bodies of the bucket teeth have a hard metal alloy slurry disposed on a surface and then are fused to form a metallurgical bond with the iron-based alloy. The wear-resistant coating can be formed of a fused, metal alloy comprising at least 60% iron, cobalt, nickel, or alloys thereof. The portion of the outer surface of the bucket teeth having the wear-resistant coating corresponds to a wear surface of the bucket teeth during operation.

An excavator includes a mobile chassis with a first bucket drum and a second bucket drum coupled thereto. The first bucket drum and second bucket drum are coupled to the chassis for positioning thereof on the surface at opposing ends of the chassis. Each first scoop on the first bucket drum is a mirror image of one second scoop on the second bucket drum when (i) the first bucket drum and second bucket drum are on the surface adjacent opposing ends of the chassis, and (ii) the first bucket drum is rotated in one direction and the second bucket drum is simultaneously rotated in an opposing direction.

In one example, a method for controlling a display with a digital signal includes detecting a binary value from a timing controller, the binary value corresponding to a portion of an image to be displayed. The method can also include determining a previous binary value from the timing controller and calculating a difference between the binary value from the timing controller and the previous binary value from the timing controller. Furthermore, the method can include generating an encoded signal based on the difference and transmitting the encoded signal to a display panel.

A liquid crystal panel and the driving method thereof are disclosed. The liquid crystal panel includes at least one storage electrode, a plurality of scanning lines, a plurality of data lines, and a plurality of pixel areas. Each of the pixel areas includes a pixel electrode, a first TFT and a second TFT. The first TFT drives the corresponding pixel electrode. The gate of the second TFT connects with the previous scanning line, and one of the source and the drain of the second TFT connects to the corresponding pixel electrode within the pixel area, and the other one connects with the storage electrode. In this way, the optimal common voltage is applied to the liquid crystal panel when the liquid crystal panel is in a displaying process, and thus the display performance is guaranteed.

According to one embodiment, each pixel of a liquid crystal display device includes: a switch configured to sample subframe data; a storage unit configured to hold the subframe data sampled by the switch, the storage unit and the switch constituting an SRAM cell; and a conductive switch disposed between a liquid crystal display element and an adjacent pixel. A range of a source voltage of NMOS and PMOS transistors constituting each inverter constituting the storage unit of one pixel is configured to be able to be set separately from a range of a source voltage of NMOS and PMOS transistors constituting each inverter constituting the storage unit of another pixel.

A GOA (Gate driver On Array) for an LCD (Liquid Crystal Display) device is disclosed herein. The LCD device comprises a plurality of scanning lines. The GOA circuit comprises a plurality of GOA units, which are cascaded with each other as a plurality of level GOA units. The (n)th level GOA unit comprises a clock circuit, a pull-down circuit, a bootstrap capacitor circuit, a pull-up circuit, and a pull-down sustain circuit, to improve the color shift issue of a Tri-gate.

A method and network node for adaptation of contention windows in a multicarrier wireless communication system implementing a listen-before-talk protocol are disclosed. According to one aspect, a method includes determining at least one component carrier (CC), of multiple CCs to serve as a backoff channel. The method further includes performing a listen-before-talk procedure on the at least one CC serving as a backoff channel. The listen-before-talk procedure includes sensing for each backoff channel whether a clear channel exists during a backoff period drawn from a contention window (CW). The LBT procedure also includes deferring transmitting on a CC for which the sensing does not indicate that a clear channel exists. The LBT procedure also includes transmitting on a CC for which the sensing indicates a clear channel exists. The method also includes determining a size of the CW based on at least one transmission feedback value.

There are described powders comprising agglomerated nanocrystals of an electroactive alloy and oxygen. The main component of the alloy can be of nickel, cobalt, iron or mixtures thereof while the alloying element is one or more transition metals such as Mo, W, V, the alloy also including oxygen. Preferably the nanocrystals will be made of an alloy of nickel, molybdenum and oxygen. An electrode which is used by compacting the powders is also disclosed. Also disclosed, is a process for producing the powders by providing particles of nickel, cobalt and iron or oxides thereof with particles of at least one transition metal, (Mo, W, V) or oxides thereof and subjecting the particles to high energy mechanical alloying such as ball milling under conditions which include oxygen and for a sufficient period of time to produce a nanocrystalline alloy. Electrodes produced from these powders have an electrocatalytic activity for the hydrogen evolution which is comparable or higher than the electrodes which are presently used in the electrochemical industry. Moreover, these materials present an excellent chemical, electrochemical and mechanical stability. When use as a cathode the powders are useful in water electrolyzers, in chlor-alkali or the like cells.

A centerline marker holder used for engaging and sliding along a portion of two intersecting walls and sliding along an exterior or interior rounded or bull nose corner between the walls. The marker holder uses a pencil for drawing a centerline along a length of the corner. The marker holder includes a flat, first wall engaging member attached at an angle to a flat, second wall engaging member. Along a length of an intersection of the first and second wall engaging members is a centerline hole. The centerline hole is dimensioned to receive the pencil therethrough for marking the centerline. The marker holder also includes a plurality of offset holes from the centerline hole for drawing parallel offset lines at a selected distance from the centerline.

The present disclosure provides methods, computing device readable medium, devices, and systems having a dental attachment placement structure. One dental attachment placement apparatus includes a body having an attachment placement surface that is to be placed on an attachment affixing surface of a tooth and wherein the attachment placement surface includes a portion that is shaped to allow placement of an attachment at a particular position on the affixing surface of the tooth and a portion of the body having a contour that is shaped to correspond with a contour of an alignment surface of a tooth and when the contour of the body and the corresponding contour is aligned, the attachment is located at the particular position and can be secured to the affixing surface of the tooth.

The present invention provides a dental implant with a post section that can be implanted in a jaw with a designated mounting component. A crown may be attached to the mounting component. The cmounted components are designed in multiple sections, preferably in two sections, in which a first mounted component with an attached formed first contact pin can be firmly inserted into an allocated recess in the post section, and a second mounted section with an attached formed second contact pin can be inserted into the recess in the second mounted section.

The present invention relates to an endosseous implant assembly adapted for treatment of peri-implantitis. The implant assembly comprises an implant core body configured to receive and couple with implant insert structures that potentially facilitate treatment of peri-implantitis.

Root canal abutment devices and methods which facilitate the adjustment or removal of an oral appliance, e.g., a crown or bridge, from a reconfigurable abutment assembly are described. The adjustable abutment assembly may be secured within a pulp chamber of a pre-existing tooth. The abutment assembly has a projecting abutment portion with one or more shape memory alloy sleeves or plates or elements extending along the abutment. Each of the sleeves has a length with at least one curved or arcuate portion. Energy may be applied to the elements such that the arcuate portion flattens to allow for the oral appliance to be placed thereupon while removal of the energy allows the elements to reconfigure into its curved configuration thereby locking the oral appliance to the abutment. Removal of the oral appliance may be effected by reapplication of energy to the elements.

A multi-layer coating of alternating titanium nitride (TiN) and titanium carbo nitride (TiCN) layers is applied to at least part of a dental device for use in attaching crowns, overdentures, and the like in a patient's jaw, where the outermost layer is TiCN with a predetermined percentage of carbon to produce a pink color. The pink outermost layer is of sufficient thickness to conceal the color of the underlying layers, and is very hard and resistant to wear and damage in use. At the same time, the outermost TiCN layer is of a color consistent with the gingival anatomy, and is very hard and resistant to wear and damage in use.

The present invention relates to oral and dental care and cleaning agents comprising an aqueous dispersion of a phosphate-containing and/or phosphonate-containing polyurethane polymer and anionic surfactant(s), to tooth cleaning methods using these agents, and to the use of oral and dental care and cleaning agents comprising an aqueous dispersion of a phosphate-containing and/or phosphonate-containing polyurethane polymer and anionic surfactant(s) to reduce the restaining of teeth and/or to reduce biofilm development on dental surfaces and/or to reduce the adhesion of bacteria to dental surfaces and/or to extend the antibacterial action of antibacterial substances.

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.

A dental bur (10) is disclosed having an elongated shank (11) which extends to a cutting head (12). The shank includes a gripping portion (14), a tapered transition portion (15), and a neck portion (16). The diameter of the neck portion (D1) is generally the same as the diameter of the cutting head (D2). The cutting head includes six helical cutting flutes (20) extending from the neck portion (16) to a tip (18). Each cutting flute has a top cutting edge (21) and a series of generally rectangular shaped cross-cut notches. The rectangular shaped cutting notches are formed by a generally flat floor (25) and two oppositely disposed sidewalls (26). The floor forms a floor cutting edge (28) while the sidewalls form sidewall cutting edges (29). The intersection of the floor cutting edge with the sidewall cutting edges form two interior cutting corners (30).

The tool for treatment of interdental surfaces includes a strip (10) having an abrasive field (12) on at least one of its longitudinal sides (11). The field is situated at a distance (A) from the apical edge (11a) of the longitudinal side, the latter being blank between the apical edge and the field.

A post for a dental crown is disclosed having improved structural features—including increased post strength and reduced likelihood of root fracture. In one embodiment, the post includes a quadrangle (4-way) split shank for increased compliance and root stress reduction while providing very high mechanical grip strength and pull-out resistance. In another embodiment, a shortened threaded section and a thread-free shank tip minimize the possibility of root fracture while still providing high grip strength and pull-out resistance. Embodiments also include a radiused transition from a primary thread to a secondary thread portion of the shank for stress reduction; and axial grooves, cross-axis through holes and other shape features of the post head for increased crown retention strength.

The present invention provides a dental implant that can deal with a subsequent reduction in bone mass while reducing a burden on a patient, and a set thereof. The present invention is directed to a dental implant comprising: a first stage implant 1 that has a bottomed tubular shape, a male thread 3 formed on an outer periphery thereof, and a female thread 4 formed in an inner periphery thereof; and a second stage implant 2 that has a tip part 6 having a male thread 5 threadably engaged with the female thread 4 of the first stage implant 1 and a rear end part 7 to which an upper prosthesis is to be attached via an abutment 8, wherein the female thread 4 of the first stage implant 1 and the male thread 5 of the second stage implant 2 are tapered threads.

The replacement of teeth using dental implants has always been done sequentially with the placement of the implant into a patient's bone followed by the creation of a prosthesis and subsequent insertion of the prosthesis. The process can take numerous visits and is done over a period of many months. This patent describes a method of using a digitally designed and created dental prosthesis as the drill guide to place the implants. Rather than the stent acting as a guide to place the implants, the drill guide itself comprises a stent encasing the final prosthesis. The final prosthesis—whose placement was digitally predetermined—is then secured with small-diameter implant screws, and the case is completed in one short visit.

The present invention provides a dental member, which has a reduced size, and thus prevents damages to tooth roots upon implantation, has high strength and low elasticity, and is excellent in engraftment stability after implantation. The dental member is produced with an amorphous alloy having a composition represented by formula: ZraNibCucAld [wherein “a” ranges from 60 to 75 at. %, “b” ranges from 11 to 30 at. %, “c” ranges from 1 to 16 at. %, and “d” ranges from 5 to 20 at. %] and is used as an orthodontic anchor screw wherein the screw part has a core diameter of 0.5-1.0 mm or a length of 2-5 mm, a one-piece-type dental implant wherein the screw part has the largest diameter of 0.5-2.9 mm and a length of 2-13.4 mm, or a two-piece-type dental implant wherein the screw part has the largest diameter of 0.5-2.9 mm and a length of 2-5.9 mm.

Custom dental prosthesis or implants each individually designed and manufactured to replace nonfunctional natural teeth positioned in a jawbone of a specific pre-identified patient are provided. An example dental prosthesis/implant includes a dental implant body having a prosthesis interface formed therein to receive an occlusally-facing dental prosthesis component. The prosthesis interface has a custom three-dimensional surface shape positioned and formed to create a form locking fit with respect to the occlusally-facing dental prosthesis component when positioned thereon.

A method of analyzing a positional relationship between a dental restoration and a dental substructure. The method has steps of scanning a reference area and determining the shape of the dental substructure in its positional relationship to the reference area, and thereby providing a virtual dental substructure model and scanning the reference area along with scanning at least a portion of the dental restoration in fit position with the dental substructure to provide a virtual assembly model. The method further has the step of providing fitting quality information between the dental restoration model and the dental substructure model. The method utilizes superposing of further virtual models to provide the fitting quality information. The method facilitates the assessment of the quality of the fit between a dental restoration and a dental substructure.

A dental carrier comprises a thermoplastic carrier. The thermoplastic carrier has a pattern structure. After heating the thermoplastic carrier, the thermoplastic carrier is provided with a user to be impressed by teeth or alveolar ridge for forming teeth or alveolar ridge model of the user. Compared to the prior art, the dental carrier of the present invention can provide the dental medicament contained in the pattern structure to be precisely applied and hold onto the treatment area and the medicament can be evenly coated on the teeth, root, or periodontal tissue for the treatment of teeth. When the dental carrier is not used to carry medicament, the pattern structure can improve the mechanical strength and fitness of the dental carrier to be used as a biteplate, orthodontic retainer, periodontal dressing for treatment or protection or mouth guard in sports.

A dental implant assembly includes an implant, an abutment, and a fixing element. The implant is placed in the alveolar bone. The abutment is assembled to the implant and includes a tapered position-restricting part and an elastic pressing part. The tapered position-restricting part has an abutment fixing channel substantially matching the tapered position-restricting outer wall of the tapered position-restricting trench. The elastic pressing part includes the elastic pressing structures extended from the tapered position-restricting part. The fixing element includes the fixing head and the fixing rod extended from the fixing head. A tolerance allowable gap is formed between the abutment fixing channel and the fixing rod. As the abutment is assembled to the implant, the elastic pressing structures press against the position-restricting wall first to hinder the relative rotation therebetween; when an offset error exists, the tolerance allowable gap allows the fixing rod to penetrate the abutment fixing channel.

A three-dimensional (3D) scanner device for generating a three dimensional (3D) surface model of shaped objects, such as dental structures, applicable for use in the field of dentistry, particularly to dental prosthetics manufacturing is described. The scanning device can include a probe head having a particular configuration and utility. Methods and systems relating to the device and components thereof are also disclosed.