131 results about "Biting force" patented technology

A device used in conjunction with fixation hardware to provide a two-stage process to address the competing needs of immobilization and re-establishment of normal stress-strain trajectories in grafted bone. A method of determining a patient-specific stress/strain pattern that utilizes a model based on 3D CT data of the relevant structures and cross-sectional data of the three major chewing muscles. The forces on each of the chewing muscles are determined based on the model using predetermined bite forces such that a stiffness of cortical bone in the patient's mandible is determined. Based on the stiffness data, suitable implantation hardware can be designed for the patient by adjusting external topological and internal porous geometries that reduce the stiffness of biocompatible metals to thereby restore normal bite forces of the patient.

The invention relates to a dental implant, comprising an implant part, an abutment part and a central positioning bolt, which is characterized in that a peripheral cylindrical spiral body of the implant part is divided into three sections of an implant shoulder part, an implant main body part and an implant cone part, a self-tapping slot is formed on the cone part, an inner hole which can be inserted in the abutment part to form the inner intubation sleeve type connection is formed therein; the inner hole is divided into the upper section of a conical part, the middle section of an implant inner hole deep part and the lower section of an implant inner thread with the diameter less than that of the middle section; the abutment part is a rotary body which is sequentially reverse conical, positive curved, positive conical and cylindrical from top to bottom at the periphery, the abutment part can be a solid body and can also be the rotating body with a through hole which can be equipped with the central positioning bolt at the center, and the periphery thereof is a circular table which is sequentially reverse conical, positive curved, positive conical and cylindrical. The dental implant of the invention has rapid implantation, great strength, tight positioning and early retention, which can prevent the rotation, transfer the scattered bite force and scatter the stress function of the central bolt.

A method and a device for effecting the cordless retraction of the gingival sulcus tissue prior to the taking of an impression of a tooth for making a crown or bridge which is attained by controlling any bleeding in the gingival sulcus area, and utilizing a dental dam preferably formed of a sponge or foam like material to contain an astringent fortified silicone impression material embedded about the prepared tooth, and using the patient's biting force to apply the necessary pressure onto the dam until the silicone impression material sets and adheres to the dam to enhance easy removal of the set impression material from the tooth. The dam is formed to accommodate either the posterior teeth or the anterior teeth.

Methods and apparatus for producing controlled tooth-moving forces are provided. An orthodontic appliance includes one or more occlusal surface features that modify bite forces between opposing teeth during intercuspation to aid in realignment of the teeth. The interception bite forces can be applied between appliance shells on opposing arches, or between an appliance shell and an opposing tooth. These modified bite forces can be used to supply or augment tooth-moving forces, and the tooth moving forces can produce moments to urge rotational movement of a tooth. Also described herein are orthodontic appliances having an occlusal outer surface contours that are distinct from the occlusal inner surface contour within the dental appliance and may be configured to selectively intercuspate.

Products and methods for reducing tartar on the teeth of a pet are provided. In an embodiment, a chewable product that enhances dental hygiene in a pet is provided comprising a body having a continuous phase and a discontinuous phase in such a proportion so that the force required to penetrate the product is greater than an anticipated bite force exerted by the pet during a normal biting event, and below the maximum force that the pet may periodically exert.

The invention provides an auxiliary system for dental diagnosis and restoration which comprises a computer, a three-dimensional scanner connected with the computer, a dental bite force test instrument and a display, wherein the dental bite force test instrument is used for testing the distribution condition of the dental bite force of a patient and transmitting bite force measurement data acquired through the test to the computer for processing; a bite force distribution figure is formed on the computer and is displayed by the display; the three-dimensional scanner is used for scanning a dental model obtained after teeth are modeled and transmitting three-dimensional data of the dental model to the computer for processing; a dental model three-dimensional figure is formed on the computer and is displayed by the display; and correctness of dental diagnosis and restoration can be guaranteed by contrasting and analyzing the two figures on the same software interface. The auxiliary system is applied to auxiliary diagnosis of teeth.

The invention provides a temporomandibular joint training implement. The temporomandibular joint training implement comprises a supporting part and a body part, wherein the supporting part comprises two half ring-shaped forked plates which conform to an upper and lower dental arches respectively, two connecting arms and two supporting arms, the middle parts of the forked plates are provided with forked plate handles respectively, one ends of the forked plate handles are connected to the edges of the excircles of the forked plates, the other ends of the forked plate handles are connected to the front ends of the connecting arms through front connecting pins respectively in a hinged mode, the rear ends of the connecting arms are connected to the front ends of the supporting arms through rear connecting pins respectively in a hinged mode, and the body part comprises a shell body, a sliding sleeve, a spring, a pressure adjusting nut, a pressure adjusting screw rod and a position adjusting nut. The temporomandibular joint training implement has the advantages that hand gripping or pressing power does not needed, it is only need to adjust a corresponding opening distance and a corresponding opening elastic force, through the automatic bite force of the patient, the upper and lower jaws are closed, the spring force of the spring is used for assisting the patient to open the mouth, repeated upper and lower movements of the lower jaw are achieved, and the patient is relaxed and comfortable.

A dental x-ray sensor assembly includes a bite block used for digital imaging, wherein a surface of the bite block includes a deformable material that readily returns to an undeformed position after a biting force is removed therefrom.

The invention provides a steel pipe concrete pile. The steel pipe concrete pile comprises an outer-layer steel pipe; a spiral rib is fixed on the inner wall of the outer-layer steel pipe; a plurality of circles of rivets are fixed at the circumference of the inner wall of the outer-layer steel pipe; the outer-layer steel pipe is lined with a concrete inner layer, and an end plate is arranged at the end portion of the outer-layer steel pipe; according to the structural design, the biting force of the steel pipe and the concrete comprises three parts, namely the biting force of the spiral rib and the concrete, the anchoring force of the rivet and the concrete and the binding force of the inner wall of the steel pipe and the concrete; the added spiral rib rivet is capable of improving the binding of the concrete and the steel pipe to a large extent, so that the concrete and the steel pipe can be bound firmly and the impact resistance can be enhanced, and in the striking process, the concrete and the steel pipe are not separated from each other. According to experimental verification, after the spiral rib is added and the rivet is arranged, the bending resistance and the shear-bearing capacity of the novel pipe pile are improved by 50%.

The invention discloses a resistor testing apparatus. The apparatus comprises a four-point resistor testing device, a resistance meter, a thermometer, a tubular furnace, a gas cylinder, an air exhauster, an air inlet flange and an air exhaust flange, wherein the four-point resistor testing device comprises a resistance testing probe assembly and a sample bench assembly which are movably connected through a tubular clamp; the resistance testing probe assembly is provided with resistance testing probes; the sample bench assembly is provided with a sample bench and a temperature measuring probe; and the resistance testing probes abut tight against the upper surface of the sample bench under effects of the bite force of the tubular clamp. The use of the four-point resistor testing device improves the accuracy of the resistor testing apparatus provided by the invention, at the same time, during measurement of a sample to tested, on one hand, the sample to be detected is not polluted, and on the other hand, the problem of incapability of accurate control of the positions of the four probes due to silver slurry pasting in a conventional testing method can be solved. Besides, the measuring temperature is not restricted by an oxidation temperature of silver slurry anymore, and theoretically, the testing temperature can reach the melting point of a platinum wire, i.e., 1680 DEG.

The invention discloses a novel side slope retainer anchor anti-sliding pile, which comprises a cylindrical pile body and is characterized in that a cylindrical cavity is arranged in the pile body, a plurality of water filtering holes are uniformly distributed in the axial direction of the pipe body, a water discharge pipe is arranged in the cylindrical cavity, broken stone is filled at the gap part of the cylindrical cavity, a water outlet of the water discharge pipe is connected with an external vacuum pump, the novel side slope retainer anchor anti-sliding pile also comprises an anchor rod body with the round cross section, the anchor rod body passes through the pile body, an included angle between the anchor rod body and the pile body is 15 to 25 DEG C, the anchor rod body comprises a plurality of sections of coaxially and integrally formed rod body sections, and the diameter of the rod body sections is sequentially reduced from the rod head of the rod body to the rod tail. The novel side slope retainer anchor anti-sliding pile has the advantages that the anti-sliding effect and the water discharge are integrated, in addition, the bending resistance intensity is improved, and meanwhile, the bite force and the friction force between the anchor rod and the mortar are improved.

The invention discloses a casting porcelain tooth with zirconium oxide as a base crown and a preparation method thereof. The preparation method includes the following steps that 1, the zirconium oxide base crown is prepared, wherein a color porcelain block or a color-clarity-gradually-changing porcelain block or a white porcelain block immersed with staining fluid is selected, CAD (Computer Aided Design)/CAM (Computer Aided Manufacturing) is used, a zirconium oxide inner crown is designed and sintered, and then the zirconium oxide base crown is prepared; 2, the casting porcelain tooth is prepared, wherein the zirconium oxide base crown is sleeved with a prepared model, embedded and then heated in a casting porcelain furnace for model removal, heating continues to be conducted, finished porcelain is molten and then cast into a cavity formed after the model is removed, and the casting porcelain tooth with zirconium oxide as the base crown is obtained after cooling is completed. Zirconium oxide is used as the base crown, strength is high, large bite force can be borne, and the service life is prolonged. The casting porcelain tooth is good in clarity, the strength is similar to that of a natural tooth, the overall attractiveness effect is good, cost is low, complex after-treatment is not needed, and the influences of human factors are low.

The invention discloses a prefabricated bridge pier steel bar connection manner and a construction method thereof. A steel bar embedded in a precast concrete component and a grouting sleeve are included, a steel chisel strip is arranged on the inner wall of the grouting sleeve along the circumference, one end of the grouting sleeve is provided with a grouting hole, the other end of the grouting sleeve is provided with a slurry discharging hole, a limit baffle is arranged at the center of the sleeve, rubber ring plugs are arranged on ports of the two ends, the steel chisel strip is welded to the inner wall of the sleeve, the surface of the steel bar is in a concave-convex shape, and the shape of a joint of the steel chisel strip is matched with the steel bar to form mechanical overlap. In the installation process of a prefabricated bridge pier, after a prefabricated component is straightened and positioned, the other end of the steel bar is inserted into the grouting sleeve, as the joint of the steel chisel strip is in mechanical connection with the steel bar, the steel bar is not easily pulled out, and at the time, ordinary mortar is poured from the grouting hole. According to theprefabricated bridge pier steel bar connection manner and the construction method, the steel bar and the grouting sleeve have mechanical biting force, the steel bar is not easy to be pulled out, certain tensile and compressive resistance can be provided, then the ordinary mortar is poured into the sleeve, and the construction accuracy and quality assurance are better.

The invention relates to a method for testing the rodent damage resistant property of cable materials. In a device provided with two structural units which can move in opposite directions, nibble teeth or relative artificial teeth of rodents are fixed at one side of two opposite end parts of the two structural units, which can access and touch each other, and a tested material sample is fixed at the other side; the tooth tops of the nibble teeth or the relative artificial teeth are opposite to a tested material sample. The two structural units are driven to move in opposite directions to forcethe tooth tops of the nibble teeth or the relative artificial teeth to touch and press the surface of the tested material sample, a pressure value is recorded when the tooth tops damage the surface of the tested material sample. Test data are compared with the test data of the known maximal biting force of the rodents to obtain the test result of the nibbling damage resistant property of the tested material sample. The method can conveniently, quickly and qualitatively test, judge and evaluate the rodent damage resistant property of the cable materials.

The invention relates to an anchoring method of a flat cross section of a carbon fiber composite reinforcement material. The anchoring method is characterized in that the carbon fiber composite reinforcement material is locally heated and softened at a part close to the tail of an anchorage device, when the temperature of the carbon fiber composite reinforcement material is close to the solidifying temperature of the reinforcement material, the heated part is rolled to be flat by a tool, the reinforcement material is subjected to four-times rolling, the rolling is respectively carried out two times in the orthogonal direction and the vertical direction of the reinforcement material, and after cooling, the rolled part is solidified again; after the reinforcement material passes through location holes of an end plug and a sealing cover, the anchorage device is vertically placed, the end plug is moved away, and an epoxy resin mortar anchoring filler is poured into the anchorage device from the small end of the anchorage device, after the anchorage device is filled with the filler, the end plug is put at an original location, and after the anchorage device is vertically placed for one day and the epoxy resin mortar anchoring filler is solidified, the glue pouring and solidifying of the other end are carried out. The anchoring method has the advantages that the local surface of the carbon fiber composite reinforcement material can be rapidly and conveniently flattened, the contact area between the reinforcement material and the epoxy resin mortar anchoring filler is enlarged, the mechanical bite force is generated, the anchorage bonding length is reduced, and meanwhile, the reinforcement material is prevented from slipping off from the anchoring filler.

The invention provides a parallel-type spline falling-prevention device and an application method thereof. According to the parallel-type spline falling-prevention device, a movable force bearing device can drive rotation wedge blocks to be clamped into tooth grooves of a guide frame spline, the rotation wedge blocks have driving force for making the rotation wedge blocks rotate anticlockwise, andclamp blocks limit continuous anticlockwise rotation of the rotation wedge blocks when the rotation wedge blocks anticlockwise rotate to horizontal positions; when clamped into the tooth grooves of the guide frame spline respectively, the rotation wedge blocks can move upwards relative to the guide frame spline, the clamp blocks can prevent the rotation wedge blocks from moving downwards relativeto the guide frame spline, bite force between the rotation wedge blocks and the guide frame spline can provide high bearing capability, a falling prevention effect is achieved in a climbing stage ofa guide frame climbing working platform, operation safety of mechanical equipment is ensured, and the problems are solved that in a prefabricated building major structure construction stage of the guide frame climbing working platform, due to long-term electromagnetic braking of a motor, sufficient braking force can be caused, and a current locking device is high in manual intervention degree andlow in accuracy.

The present invention provides a personalized lower jawbone biomechanics model stress measurement system. The system comprises a measurement pedestal, a muscle strength equivalent structure, the fixing device of the muscle strength equivalent structure, an articular disc fixing device, a loading platform and a strain gage. The fixing device of the muscle strength equivalent structure, the articular disc fixing device and the loading platform are installed on the measurement pedestal, the personalized lower jawbone biomechanics model includes a lower jawbone and two temporal-mandibular joint discs, the lower jawbone is provided with the spring hanger of the upper jaw muscle group, the strain gage is pasted at the measurement region of the lower jawbone, the two temporal-mandibular joint discs are fixed in the articular disc fixing device, two condyles on the lower jawbone model are arranged in the articular disc, the teeth for bearing the bite force in the lower jawbone model is contacted with the motion end of the loading platform, the lower end of the muscle strength equivalent structure is connected with the spring hanger, and the upper end of the muscle strength equivalent structure is connected with the fixing device of the muscle strength equivalent structure. The personalized lower jawbone biomechanics model stress measurement system can express the patient's real condition and has good measurement accuracy.

The invention discloses a high-efficiency jaw crusher with large bite force, wherein a drive shaft, a crushing pair, a moving jaw and a toggle plate are arranged on a rack; the crushing pair comprises a pair of tooth plates standing opposite each other so as to form a crushing cavity; one tooth plate is fixedly connected on the rack and the other tooth plate is fixedly connected on the moving jaw; the upper end of the moving jaw is pivoted on the drive shaft and the lower end of the moving jaw is pivoted on the toggle plate; a driving wheel is connected on the drive shaft; and the tooth plates are flat plates with reticular mesh structures. According to the invention, a traditional way of setting tooth form on the basis of a conventional technical tooth plate is broke through; a toothless tooth plate is provided; the tooth form design is replaced by a honeycomb reticular mesh design to ensure that the crushing functions of split, breaking and extrusion are strengthened; the most remarkable effect is that a crushing mechanism mainly based on extrusion and squash in the prior art is changed into comprehensive application mainly based on filing and shear and supplementarily based on the split, the breaking and the extrusion; and then, larger crushing bit force are provided and the crushing performance is greatly improved.

A dental impression apparatus for obtaining a patient's dental impression is provided. The dental impression apparatus includes a support frame of a predefined shape, a partially permeable membrane mounted on the support frame, and absorbent barrier members. The support frame includes a distal member, a buccal edge member, and a lingual edge member. The absorbent barrier members mounted to the buccal edge member and the lingual edge member of the support frame define opposing troughs separated by the partially permeable membrane. The opposing troughs receive the patient's mandibular teeth and maxillary teeth. The opposing troughs are deposited with a first impression material and/or a second impression material for obtaining the dental impression of the patient. The absorbent barrier members confine a flow of the first impression material and the second impression material within the opposing troughs, when the patient applies a biting force within the opposing troughs.

The invention designs a spiral fin grouting anchor cable assembly with an adjustable angle. The spiral fin grouting anchor cable assembly comprises an anchor cable body and an anchorage device, wherein the anchor cable body is formed by stranding steel strands by taking a grouting pipe as a cable core; the grouting pipe is in a pipe shape, and is composed of a cement outlet, a cement spraying hole and a grouting opening; the anchorage device comprises a tray, an anchor ring and an anchor cable clamping piece, wherein a hemispherical concave table of the tray is matched with a hemispherical protruding end of the anchor ring; the anchor cable body penetrates a through hole of the tray, and penetrates out from an anchoring hole of an anchor ring cylinderical end through the matched tray and anchor ring; the anchor cable body is clamped by the anchor cable clamping piece in the anchoring hole; the anchorage device and an anchor cable are enabled to always keep vertical after being stressed by the anchorage device through a self-adjusting function, so that a bite force can be guaranteed to be uniform; under an equivalent acting force, the probability that the anchorage device drops off and glides can be greatly reduced. With the adoption of the spiral fin grouting anchor cable assembly with the adjustable angle, the combination of anchor cable support effect and grouting reinforcement effect is realized, so that the anchoring range and the anchoring force are greatly increased, and the consumption of a drill hole drilling machine and anchor cable materials is saved, thereby the cost is lowered.

The invention provides a bite force measuring device. The bite force measuring device comprises a bite sensing sheet, a pressure measuring module and a wireless signal transmission module, wherein thebite sensing sheet is internally provided with a pressure sensor; the pressure sensor is provided with an electric parameter which changes along with pressure; the pressure measuring module is used for measuring the electric parameter of the pressure sensor and calculating a pressure value according to the electric parameter; and the wireless signal transmission module is coupled to the pressuremeasuring module, receives the pressure value from the pressure measuring module and transmits the pressure value. The tooth biting force measuring device is convenient to use, is safe and reliable, is high in measuring precision, and does not cause discomfort to a patient in a using process.

The invention discloses a gear lead screw which comprises a helical tooth shaft, a straight tooth gear, a sleeve, end covers, a straight tooth gear shaft, a rolling bearing and the like. A long shaft of which the surface is provided with helical teeth with a certain helical angle alpha is adopted as the helical tooth shaft; the straight tooth gear shaft penetrates through a U-shaped groove which is formed in a square groove, wherein the square groove is formed in the sleeve and inclined to the sleeve axis in an angle which is equal to and has the same direction with the helical angle alpha of the helical tooth shaft; by installing the rolling bearings in blind holes which are formed in the end covers arranged at the two ends of the sleeve and are coaxial with the U-shaped groove, the straight tooth gear installed on the straight tooth gear shaft is driven by a motor to roll along the helical line on the helical tooth shaft; helical transmission is achieved through the mechanical bite force of the straight tooth gear and the helical tooth shaft, and the helical line of a helical motion trail is orthogonal to the helical line of a helical structure of the helical teeth. Compared with a traditional lead screw, the gear lead screw has the advantages that not only is the sliding friction not generated, but also the motion lead angle can be significantly increased, the transmission efficiency is higher, and transmission is more reliable.

The invention belongs to the field of oral treatment denture, and particularly discloses broken-stress attachment denture. The denture comprises a base provided with artificial teeth, wherein a broken-stress attachment connected with an abutment tooth is arranged on the base, and comprises an attachment positive part and an attachment negative part which are made of Vitallium 2000 plus Co-Cr-Mo alloy; a main connecting hole is formed in the tail end of the attachment negative part; a press head used for extruding the middle part of the attachment negative part is arranged at the front end part of the attachment positive part; a main connecting head matched with the main connecting hole is arranged on the attachment positive part; the buffer gap between the main connecting head and the main connecting hole is 0.3-0.5mm; and the friction coefficient at the contact part between the press head and the attachment negative part is 0.25-0.35. After the attachment denture is arranged on the abutment tooth, the bite force generated by chewing foods vertically acts on the attachment negative part, and the problem that the abutment tooth connected with the denture is separated due to the bite force can be solved.

The invention discloses a multi-direction biting force measuring device based on a force sensor. The multi-direction biting force measuring device comprises a detachable outer shell and a plurality of groups of measuring systems arranged in the outer shell, wherein the outer shell comprises an upper shell body and a lower shell body, the plurality of groups of measuring systems comprise a main measuring system with one end connected to the inner wall of the outer shell and the other end pushing against the inner wall of the outer shell, and an auxiliary measuring system with one end connected to the main measuring system and the other end connected to the inner wall of the upper shell body or the inner wall of the lower shell body. The multi-direction biting force measuring device based on the force sensor overcomes the defect that an existing instrument cannot measure the specific direction of the biting force, the real-time positive pressure is measured on the basis of pressure sensors of the measuring systems in four directions, the real-time measurement for the magnitude and direction of the biting force when a pair of upper and lower teeth chews an object can be realized, the multi-direction biting force measuring device can be used for diagnosis and treatment for oral diseases, the biting force measuring device provided by the invention can be repeatedly used, and the spherical outer shell can also provide a true chewing feeling when biting force of a person is measured.

The invention discloses a four-point resistor testing device. The four-point resistor testing device comprises a resistance testing probe assembly and a sample bench assembly which are movably connected through a tubular clamp; the resistance testing probe assembly is provided with resistance testing probes; the sample bench assembly is provided with a sample bench; and the resistance testing probes abut tight against the upper surface of the sample bench under effects of the bite force of the tubular clamp. The resistance testing of the four-point resistor testing device is contact type testing, and a silver slurry bonding mode in a conventional four-point resistor testing method is avoided, so that on one hand, a sample to be detected is not polluted, and the sample to be detected can be continuously used or subjected to secondary testing; and on the other hand, the problem of incapability of accurate control of the positions of the four probes due to silver slurry bonding is avoided, and the measuring precision is improved. At the same time, the measuring temperature is not restricted by an oxidation temperature of silver slurry anymore, and theoretically, the testing temperature can reach the melting point of a platinum wire, i.e., 1680 DEG.

The invention discloses a feed additive for a yellow catfish. The feed additive is prepared from the following raw materials in parts by weight: 10-30 parts of seaweed extract powder, 3-8 parts of an adenosine composition, 3-10 parts of fennel powder, 2-7 parts of pericarpium citri reticulatae powder, 2-3 parts of garlic powder, 2-3 parts of spirulina powder, and 0.1-1 part of mineral. The feed additive disclosed by the invention has the benefits that the feed additive is rich in food-calling components; the seaweed extract powder which has the special taste of seaweeds has the strong effect of ingestion stimulation for the yellow catfish, so that the seaweed extract powder is a stimulant for the olfactory nerve of the yellow catfish; adenosine diphosphate, adenosine triphosphate and 5'-adenosine phosphate have a high food-calling effect, so that the feeding frequency of the yellow catfish is increased, and the biting force of the yellow catfish is enhanced; the garlicin which is a natural plant phagostimulant has the high food-calling effect on the yellow catfish, so that the feeding rate of the yellow catfish is increased; the fennel powder and the pericarpium citri reticulatae which are Chinese herbal medicine powder can enhance the immunity of the yellow catfish and have the food-calling effect; the spirulina powder can quickly promote the color increase of the body color of the yellow catfish.