63 results about "Pulp (tooth)" patented technology

A portable, multimodal dental diagnostic device for assessing the vitality of the dental pulp, consisting of: a detachable diagnostic component comprising a variety of probes, including the following: a heat probe configured to deliver controlled heat stimuli to a tooth surface and measure the heat response of the dental pulp; an electrical probe configured to deliver low-voltage electrical pulses to the tooth surface and measure the electrical impedance of the dental pulp; and an optical probe configured to assess blood oxygen saturation and microcirculation in the dental pulp using near-infrared light; a microcontroller unit configured to process sensor data from the thermal probe, the electrical probe and the optical probe, to calibrate measurements based on the oral base temperature and the ambient conditions, to aggregate multimodal sensor data and to control the operation of the thermal probe, the electrical probe and the optical probe; a cloud platform configured to receive and store aggregated sensor data, run artificial intelligence algorithms to analyze multimodal sensor data and generate diagnostic insights that include vital signs and diagnostic probabilities; a user application that is communicatively connected to the cloud platform and configured to wirelessly receive aggregated sensor data, display detailed diagnostic reports with vital signs and trends to the user, integrate with electronic health data systems, and issue alerts in case of abnormal readings; a wireless communication module connected to the microcontroller unit, configured to transmit the aggregated sensor data to the cloud platform; a display interface configured to show real-time feedback from the probes, including vitality assessments and sensor readings; and a main body containing the microcontroller unit, a rechargeable power supply and the display interface, wherein the rechargeable power supply can be charged via the current provided through a charging port on the main body, and wherein the main body is also equipped with on / off and start / stop switches; the device is configured to provide a non-invasive, quantitative real-time analysis of dental pulp health by combining physiological responses from thermal, electrical, and optical measurements.

Systems and methods for using a liquid jet apparatus for dental treatments are disclosed. In one implementation, the liquid jet apparatus may include a handpiece configured to deliver a high velocity liquid jet to a desired location in the mouth of a patient. The handpiece may include a positioning member having a channel through or along which the jet can propagate. The positioning member may have a distal end portion configured to be at least partially disposed in a pulp cavity, canal space, or opening in the tooth under treatment. During operation, the jet may impact an impingement surface of the distal end portion of the positioning member and be deflected as a spray through one or more openings in the distal end portion. The liquid jet apparatus may be used for root canal treatments.

The utility model discloses a portable deciduous tooth breaking device which comprises a first holding rod and a second holding rod, one end of the first holding rod is hinged to one end of the second holding rod, an extrusion head is arranged on the first holding rod, and a groove used for containing deciduous teeth is formed in the second holding rod. When the first holding rod and the second holding rod are close to each other, the extrusion head is in clearance fit with the groove; according to the scheme, the first holding rod and the second holding rod are close to each other by holding the two holding parts with a hand, so that the extrusion head crushes the deciduous teeth placed in the grooves, and the dental pulp mesenchymal stem cells in the deciduous teeth are conveniently extracted; the protruding length of the extrusion head can be adjusted, so that the distance between the front end of the extrusion head and the bottom of the groove is adjusted when the first holding rod and the second holding rod get close to each other, deciduous teeth of different sizes can be matched, and the situation that the deciduous teeth and dental pulp are crushed together due to the too small distance, and consequently the dental pulp is difficult to extract is avoided.

The invention discloses wood pulp defibrating equipment and a defibrating method thereof.The defibrating equipment comprises a shell, a rotor rotatably installed in the shell and a stator structure fixedly installed on the inner wall of the shell, the shell is provided with a feeding port and a cotton outlet, a plurality of movable tooth pieces are installed in the circumferential direction of the rotor, and the movable tooth pieces are arranged on the inner wall of the shell. The multiple movable tooth pieces are arranged on the circumferential surface of the rotor in a staggered mode to form a double-helix mode. And the stator structure comprises a pre-crushing part, a defibrating part and a homogenizing part which are sequentially distributed outside the circular arc of the rotor, and the pre-crushing part, the defibrating part, the homogenizing part and the movable tooth pieces correspondingly form a pre-crushing area, a defibrating area and a homogenizing area. According to the wood pulp defibrated by the method, fibers with the fiber length of 2.5 mm or above account for 95% or above, fibers with the fiber width of 35 microns or above account for 95% or above, the dust rate is within 4%, the high defibrating capacity of 500-1500 kg / h is achieved, and efficient defibrating, gentle carding and fiber protection are achieved.

The utility model discloses a nut grinding and pulp discharging device, which relates to the technical field of nut grinding equipment and comprises an operation box and a movable door movably hinged to the outer side of the operation box, a bearing table is fixedly mounted in the operation box, and a filtering assembly is arranged below the bearing table. The filter assembly comprises a telescopic rod fixedly installed at the bottom in the operation box, the upper end of the telescopic rod is in threaded connection with a filter screen frame, a tooth groove is formed in the top of the filter screen frame, a movable ring is movably arranged over the filter screen frame, insertion teeth are fixedly connected to the bottom of the movable ring and matched with the tooth groove, and a supporting rod is fixedly arranged on the inner side of the movable ring. And a driving rod is fixedly mounted in the middle of the top of the supporting rod, the upper end of the driving rod rotationally penetrates through the bearing table and is fixedly connected to the lower grinding disc, and the filtering assembly filters out particle impurities in pulp, so that the problems that most of existing fruit grinding pulp discharging devices directly discharge the pulp, the pulp subjected to preliminary processing is filtered and processed subsequently, and the efficiency is low are solved.

A device for estimating the thickness of rigid material in a tooth covering the pulp of the tooth. The device comprises a light source arrangement configured to emit light at a first wavelength and light at a second wavelength onto the tooth and a sensor arrangement for measuring the intensity of light reflected and scattered from the tooth corresponding to the first and second wavelengths. The device also comprises a processor configured to receive a first intensity map corresponding to the first wavelength and a second intensity map corresponding to the second wavelength from the sensor arrangement, analyze the first intensity map and the second intensity map to asses the amount of light reflected and scattered from the tooth corresponding to the first wavelength and the second wavelength and estimate an indication of thickness for the rigid material covering the pulp of the tooth based on the analysis.

The invention relates to the technical field of fiber processing, in particular to an opening device and method for blocky aramid pulp, and the opening device comprises an opening machine table, an anti-winding assembly and a rotating maintenance assembly. The first roller processing assembly and the second roller processing assembly are arranged between the two supporting frames through the rotary supporting assembly, and when bulk aramid pulp is subjected to opening pretreatment, the first roller processing assembly and the second roller processing assembly are used for carrying out pressing and scattering and preliminary loosening treatment in sequence; when a licker-in of the second roller processing assembly is subjected to loosening processing, the anti-winding assembly is matched, so that combined thorn tooth pieces on the licker-in cannot be wound to the maximum extent, the later maintenance convenience of opening processing is improved, and the rotating maintenance assembly can improve the rotating stability of the first roller processing assembly and the second roller processing assembly; and in addition, the combined thorn tooth pieces of the licker-in are modularized design of thorn tooth cylinder installation, later replacement and maintenance treatment is facilitated, and the maintenance cost and convenience are reduced.

The utility model discloses an oral cavity tooth body, which belongs to the technical field of oral cavities and comprises a protective box, a first tooth socket is placed in the protective box, the top of the first tooth socket is fixedly connected with two first mounting blocks, the tops of the two first mounting blocks are in lap joint with second mounting blocks, and the second mounting blocks are in lap joint with the second mounting blocks. Second screws are in threaded connection with the interiors of the first mounting blocks and the interiors of the second mounting blocks, the number of the second screws is two, and miniature electric push rods are fixedly mounted at the tops of the two second mounting blocks correspondingly. The purpose of dismounting or mounting the first tooth socket and the second tooth socket is achieved by screwing the first screw and the second screw, the effect of replacing the first tooth socket and the second tooth socket is achieved, and the purpose of facilitating medical staff to diagnose tooth pulp of a patient is achieved through work of a miniature illuminating lamp and a miniature 360-degree camera.

This utility model relates to the field of pulp molding technology and discloses a pulp molding device with automatic unloading function, including a processing table and an extension plate. An automatic unloading mechanism is provided on the left side of the processing table. The automatic unloading mechanism includes a toothed plate, a locking block, a fixing plate, a limiting block, and a second toothed plate. The upper surface of the first toothed plate is fixedly installed with the lower surface of the extension plate, the top of the locking block is fixedly installed with the bottom of the first toothed plate, and the right side of the fixing plate is fixedly installed with the left side of the processing table. This pulp molding device with automatic unloading function achieves automatic unloading of molded products through the meshing transmission of the first and second toothed plates and gears, combined with the linkage structure of the screw driving the limiting rod and the push plate. This significantly improves production efficiency, reduces manual intervention, and lowers labor intensity. The cooperation of the limiting block and the fixing plate ensures smooth sliding of the second toothed plate, achieving a more efficient unloading effect.

The invention relates to the technical field of medical teaching instruments, in particular to a 3D printing simulation tooth model for root canal therapy training teaching, and a construction method of the 3D printing simulation tooth model comprises the following steps: constructing a multi-modal tooth image data set by fusing CBCT volume data and oral cavity scanning point cloud information, extracting a root canal system structure based on an anatomical registration and depth segmentation algorithm, and constructing a multi-modal tooth image data set; a high-precision three-dimensional entity model is generated by combining B-spline surface reconstruction and a topological repair mechanism, an anatomical reference is established by taking a medullary cavity-root canal joint as a coordinate origin, and a curvature control point network is designed for four root canal types; space coordinates are controlled through sagittal plane, coronal plane and cross section angles, and adjacent points are connected to construct a constant-curvature arc section to realize form quantization; and fusing the quantized root canal curve with the tooth shell model, additionally arranging a pulp opening hole and a root canal positioning point, exporting an STL format, and performing SLA photocuring printing verification. According to the invention, anatomy fidelity control and standardized teaching application of the personalized root canal model are realized.

The invention relates to the technical field of dental fluorosis patient repairing, and discloses a dental fluorosis patient tooth surface defluorination repairing device which comprises a grinding device and a grinding head, a cooling assembly is arranged on one side of the grinding device, and an adsorption assembly is arranged on one side of the grinding device; and the cooling assembly comprises a liquid box, the liquid box is connected with a liquid outlet pipe through a first connecting pipe, an atomizing nozzle is arranged in the liquid outlet pipe, the liquid outlet pipe is fixedly connected to the top of the outer surface of the grinding device, and the atomizing nozzle is located at the top of the grinding head. The invention aims to solve the problems that when an existing defluorination repair device for dental fluorosis is used, friction grinding is generated in a contact core area of a grinding head and a dental surface, local friction heat is easy to damage fragile enamel of a dental fluorosis, dental pulp sensitivity is caused, heat generated by friction between the grinding head and the dental surface cannot be dissipated in time, and the dental fluorosis repair effect is poor. And the problem that the enamel with poor thermal conductivity is easy to have micro-cracks due to local high temperature is solved.

The utility model relates to the field of medical instruments. The tooth pulp aspirator comprises a shell, a sealing cover used for sealing the device is arranged above the shell, an aspirator is fixed on one side of the interior of the shell, an air bin is fixedly arranged on one side of the aspirator, a storage bin is installed on one side of the aspirator and the air bin, and a conversion bin is installed on the face, close to the aspirator and the air bin, of the outer side of the shell. A conversion disc is rotationally installed in the conversion bin, a bent channel is formed in the conversion disc, a communication groove is formed in the face, making contact with the suction device and the air bin, of the side face of the shell, and an installation groove is formed in the face, close to the conversion bin, of the communication groove. And switching between extraction and blowing cleaning can be flexibly adjusted in the working process.

The utility model discloses a paper pulp stirring device, which relates to the technical field of paper pulp stirring equipment and comprises a stirring barrel, a scraping ring and a rotary lifting mechanism, the rotary lifting mechanism further comprises a fluted disc rotationally arranged on a cover ring, and an inverted L-shaped mounting frame fixedly connected with the cover ring is arranged above the fluted disc. A driving motor is mounted at the top of the mounting frame, a shaft body of an output shaft of the driving motor is fixedly sleeved with a power gear meshed with the fluted disc, and the paper feeding device further comprises a suction mechanism used for processing paper impurities on the fluted disc; through the arrangement of the suction mechanism and the adsorption head positioned beside the dust collection head, paper pulp impurities attached to the fluted disc can be effectively and continuously sucked in the rotating process of the fluted disc and are introduced into the adsorption box for centralized storage, so that the paper pulp impurities can be prevented from influencing the rotating effect of the fluted disc; and subsequent secondary utilization of paper pulp raw materials can be facilitated.

The present invention relates to a three-dimensional biomaterial comprising particles that encapsulate at least one complementary active fragment dispersed therein. The invention also relates to a process for manufacturing said biomaterial. This biomaterial is useful for tissue regeneration, especially of dental pulp, dentin, periodontal and gingival tissues, as well as bone tissues.

The utility model relates to the technical field of mineral engineering, and provides a spoon head of an ore feeder of a ball mill, which comprises a spoon head, the end part of the spoon head is detachably connected with a wear-resistant part, the wear-resistant part comprises a middle tooth and side teeth, the end part of the spoon head is inserted into the middle tooth, the side teeth are respectively propped against the inner walls of the two sides of the end part of the spoon head, and the inner walls of the two sides of the end part of the spoon head are connected through the middle tooth and the side teeth. And the end part of the spoon head is wrapped by the device, so that ore feeding can be better guided, the impact of mineral aggregates on the spoon head in the ore feeding process is reduced, the abrasion is reduced, the spoon head is more durable, the service life of the device is prolonged, and the production cost is reduced. Meanwhile, when the ore pulp is scooped up, the splashing phenomenon can be avoided, and the ore feeding amount of the ball mill is guaranteed.

The present application provides a kind of dentin inducer for enhancing histone succinylation and its application, wherein the dentin inducer is dimethyl succinate.The present application finds that Wnt3a protein with clear odontogenic differentiation effect promotes odontogenic differentiation of dental pulp stem cells by increasing intracellular succinic acid content to induce histone succinic acid, and direct addition of succinic acid or succinic acid derivatives such as dimethyl succinate can play a Wnt3a replacement role, enhance stem cell histone succinylation and promote odontogenic differentiation of dental pulp stem cells.Furthermore, compared with Wnt3a protein class inducer, succinic acid or succinic acid derivative has the advantages of stable preparation and clear target, and is more suitable for clinical operation, which has important practical significance for promoting the clinical transformation of dental pulp dentin complex regeneration technology.

This utility model discloses a portable hydraulic pulp extraction device, including a shearing unit, a hydraulic drive unit, and a handheld drive unit. The shearing unit includes a fixed shearing component and a movable shearing component with their blades facing each other. The handheld drive unit acts on the hydraulic drive unit, which drives the movable shearing component to cooperate with the fixed shearing component to break the tooth sample. The advantages of this utility model include: the inclusion of a manual drive unit and a hydraulic drive unit, utilizing Pascal's law to amplify the force output, simplifying operation, and allowing experimenters to easily break teeth without expending excessive force. The fixed and movable shearing components have simple structures; only the movable shearing component needs to be driven to cooperate with the fixed shearing component to break the tooth.

The invention provides a multi-stage differential pulping system for improving fiber forming, and relates to the field of paper production, the multi-stage differential pulping system comprises a trapezoidal bracket, a coarse tooth main body, a first-stage box body, a middle tooth main body, a middle-stage box body, a fine tooth main body, a final-stage box body, a pulping and discharging mechanism and a collecting and connecting mechanism; the coarse tooth body is fixedly connected to the upper end face of the trapezoidal support. The primary box body is fixedly connected to the upper end surface of the trapezoidal bracket; the middle tooth body is fixedly connected to the upper end face of the trapezoid support. The intermediate box body is fixedly connected to the upper end surface of the trapezoidal bracket; the fine tooth body is fixedly connected to the upper end face of the trapezoidal support. The last-stage box body is fixedly connected to the upper end face of the trapezoidal support. The pulping and discharging mechanism is arranged in the coarse tooth main body; and the collecting and connecting mechanism is arranged on the first-stage box body. The processing quality of paper pulp is improved through the pulp grinding and discharging mechanism, and the paper production quality is improved through the collecting and connecting mechanism. The problem that the filter screen is easily blocked by fibers is solved.

This invention discloses a device for real-time monitoring of human biological information, comprising: a monitoring device, installed within a root canal-treated tooth via a filling adhesive; the monitoring device includes a battery with wireless charging capability and a wireless transmission device for sensing the patient's biological information and wirelessly transmitting the information externally, thereby monitoring blood oxygen, blood glucose, and body temperature in real time; and a charging device for charging the battery within the monitoring device. This invention eliminates the need for external restraint of the patient's body and the need for needles to penetrate the skin, enabling real-time monitoring of biological information without causing the patient any foreign body sensation or hindering their physical activity. The device can be installed during root canal treatment, and then fixed by filling the pulp cavity with filling adhesive. If the monitoring device installed within the root canal malfunctions, it can be removed and replaced.

The invention relates to the technical field of medical instruments, in particular to a bionic resin root canal model for dental teaching and a preparation method.The bionic root canal model comprises at least two tooth blocks provided with dental pulp cavities, at least one connecting face is formed on the outer surface of each tooth block, and the connecting faces are connected with the dental pulp cavities. The tooth blocks are assembled in an abutting mode through the corresponding connecting faces so that at least a root canal cavity can be defined through the dental pulp cavities, and the tooth blocks are arranged in a separable mode. The bionic root canal model can be split and reused, the training effect can be evaluated timely and accurately without adopting a mode of damaging the model, a user can improve the operation skill in a targeted mode, and the requirement of efficient clinical skill training can be met.

The invention relates to the technical field of medical instruments, in particular to dental pulp nerve cell filling paste and a preparation method thereof, and the filling paste comprises the following components: 8-12% of an inorganic filler, 12-18% of an antibacterial filler, 5-8% of slow-release antibiotic microspheres, 8-12% of an nHA-Col collagen composite material, 1-3% of a traditional Chinese medicine extract, and the balance of a liquid agent. According to the technical scheme, growth and reproduction of pathogenic microorganisms can be effectively inhibited, two schemes of protecting dental pulp nerve cells, opening pulp and not opening pulp are achieved, and the problems of multiple complications such as over-changeable blackening and breaking of the existing nerve-killing and root-tip-extraction nerve excision tooth tissue surface are successfully solved; the purpose that the permanent dental pulp nerve cell filling can be completed by one-time minimally invasive rust removal of a patient in about 15 minutes is achieved, the dental pulp nerve cells are protected, dental pulp nerves are not killed, apical nerve cells are completely filled at one time, and time and cost are saved.

The invention provides a manufacturing and using method of an in-vitro tooth jaw model for experiment teaching. The manufacturing and using method comprises the following steps: step 1, manufacturing the in-vitro tooth jaw model for experiment teaching; 2, fixing the extracted tooth; the method comprises the following steps of: cleaning and disinfecting isolated teeth required by experiment teaching, ultrasonically removing tartar, selecting 5-10g of proper heat-sensitive high polymer material, putting the selected heat-sensitive high polymer material into a 5-10ml injector, immersing the injector in a water bath, injecting the injector into a hollow cavity of the 3D printed isolated tooth jaw model after the injector is melted, then inserting the cleaned isolated teeth at corresponding tooth positions, and finally carrying out 3D printing on the 3D printed isolated tooth jaw model to obtain the 3D printed isolated tooth jaw model. After the temperature is reduced, the heat-sensitive polymer is solidified, so that the fixation of the extracted tooth required by experiment teaching is realized; 3, performing experimental training by an operator; 4, taking out the extracted tooth; and 5, carrying out subsequent treatment. The problems that a traditional gypsum model is serious in consumable loss, tedious in operation process, time-consuming, non-reusable in teaching resources and the like in tooth and dental pulp experiment teaching are solved.

The present technology relates to products for tooth whitening based on the in situ generation of active oxygen in the form of oxygen free radical species. The whitening gel comprises a modified niobium compound and its activity is primarily maximized when it is applied together with a low concentration of hydrogen peroxide of 1% to 10% (preferably 3% by mass) and stabilized with a thickener (preferably carbopol). The whitening sol can be used for tooth whitening without the need for additional light treatment, which makes it more effective than commercial products when used for tooth whitening and has significant potential to reduce side effects (allergy and inflammation). The developed product showed no cytotoxicity and no significant inflammatory effects were observed in dental pulp tissue. The present technology also describes a method for preparing the whitening gel.

The utility model belongs to the technical field of pulp unpacking in viscose fiber production, and discloses a wrapping paper skin removing device suitable for pulp bags, which comprises a mounting stand column, a tooth-shaped paper skin taking mechanism and a moving mechanism, the moving mechanism comprises a swing arm type moving frame and a longitudinal moving frame, one end of the swing arm type moving frame is movably connected with the mounting stand column, and the other end of the swing arm type moving frame is movably connected with the longitudinal moving frame. The other end is connected with the longitudinal moving frame; the tooth-shaped leatheroid taking mechanism comprises a mounting transverse plate and at least two sets of toothed clamping pieces, the mounting transverse plate is arranged at the lower end of the longitudinal moving frame, and the toothed clamping pieces are evenly distributed on the mounting transverse plate; in the set of toothed clamping pieces, the toothed clamping pieces are distributed on the two opposite sides of the installation transverse plate respectively, grippers used for clamping the packaging paper skin are formed between the oppositely-distributed toothed clamping pieces, and clamping teeth of the oppositely-distributed toothed clamping pieces are opposite. And a clamping cylinder is arranged on the mounting transverse plate. Not only is the high efficiency of removing the wrapping paper skin ensured, but also the effective removal of the wrapping paper skin of the pulp bag is ensured, and an effective premise and guarantee are provided for feeding of the pulp in an impregnation process.

The utility model belongs to the technical field of dental medical instruments, and particularly relates to an electric drill for cleaning dental pulp. The electric drill comprises an electric drill body, the electric drill body comprises a grab handle and a drill bit, a connecting part for connecting the drill bit is fixed on the grab handle, a fixing pipe is independently sleeved on the drill bit below the connecting part, the fixing pipe is connected with the outer side wall of the connecting part through a connecting mechanism, an adsorption pipe is arranged on the side wall of the fixing pipe, and the adsorption pipe is communicated with the fixing pipe. And a negative pressure mechanism for generating negative pressure in the adsorption pipe is arranged on the adsorption pipe. When teeth are drilled through the drill bit, negative pressure is generated in the adsorption pipe and the fixing pipe at the same time, powder generated when the teeth are drilled through the drill bit is sucked into the adsorption pipe through the fixing pipe, and the generated powder is treated while the teeth are drilled, so that the powder in the oral cavity of a patient is reduced; the subsequent oral cavity flushing time can be shortened, the oral cavity can be conveniently flushed, and therefore the operation time of a doctor is shortened.

System for diagnosis, planning and guided execution of dental preparations in fixed prostheses, comprising a computer system, with respective hardware and software components, as well as further dedicated peripherals, which implements a process characterized by the following steps: A) preliminary diagnosis of the elements to be submitted to a prosthetic process : A.l) evaluate the dental element(s) and related prosthetic process, A.2) evaluate the bone support, including ratio of intraosseous and extraosseous dental portion, and distance and divergence between teeth to be connected, and A.3) evaluate the internal structure, e.g. enamel, dentin, pulp, cement, material for reconstruction; B) planning of ideal dental preparation(s) : B.l) superimpose an ideal prosthetic project to an initial anatomical dental situation; B.2) define a final subgingival / juxtagingival / supragingival preparation; and B.3) starting from an ideal tooth volume, reduce the volume so as to simulate the ideal dental preparation, taking into due consideration: B.3.1) the extent of the reduction depending on the material that will be used to construct the crown, e.g. metal-ceramic, zirconia, zirconia-ceramic, composite, disilicate lithium, ceramic, B.3.2) insertion axis of the prosthesis, where multiple dental elements should be parallelized in order to have a common insertion axis, and B.3.3) inclination of the prosthesis walls, which could be more or less retentive from a mechanical point of view; C) diagnosis of the ideal dental preparation(s) generated: C.l) evaluate the proximity to the pulp in the dental vital elements, including the need of root canal therapy related to vital dental elements, C.2) evaluate the structural surface composition of an ideal abutment, including percentage of enamel / dentin / reconstruction material, in order to assess retention adhesive of the substrate, C.3) evaluate, starting from the final preparation, the quantity of healthy dental tissue in terms of height - splint / cerclage effect, in order to define the mechanical stability of the preparation; D) transfer the ideal dental preparation into the oral cavity of a real patient according to two possible options: a) develop a tooth-supported transfer mask with guide tracks for dedicated drills with

The application provides a tooth model set and a multi-layer root canal treatment exercise model, wherein the hard tissue part of the teaching tooth model is colorless and transparent printing material, and the soft tissue part is colored printing material. The hard tissue part of the pulp amputation exercise model is opaque 3D printing material, and the pulp part is colored printing material with a color different from that of the hard tissue part. The tooth crown part of the root canal treatment exercise model is opaque printing material, the tooth root part is colorless and transparent printing material, and the pulp part is colorless and transparent colloidal texture printing material. The tooth crown part of the multi-layer root canal treatment exercise model is opaque printing material, the tooth root part is colorless and transparent printing material, a translucent colored layer with a preset thickness is arranged near the pulp part of the tooth root part, and the pulp part is colorless and transparent colloidal texture printing material. The tooth model set provided by the application has a higher simulation degree of teeth and a more explicit simulation result display.

This invention relates to the development of a biodegradable scaffold containing growth factor and antibiotic loaded nanoparticulate systems with the aim of enabling the regeneration of the pulp-dentin complex of immature permanent teeth with necrotic pulp damaged due to infection, trauma, or developmental anomalies.