87 results about "TOOTH EXTRACTIONS" patented technology

The invention discloses an impacted wisdom tooth extraction resistance analysis simulation method and system based on CBCT and AI segmentation, is suitable for scenes of extraction resistance intelligent analysis and preoperative path simulation of impacted wisdom teeth, and assesses risks by automatically measuring the minimum spatial distance between the tooth root tip of a wisdom tooth to be extracted and a dental nerve tube. A resistance removal strategy is selected by performing three-dimensional mechanical analysis on adjacent tooth resistance, bone resistance and tooth root resistance of a wisdom tooth to be extracted, and a wisdom tooth extraction simulation path is planned based on a risk assessment result and the resistance removal strategy. According to the method, complex impacted wisdom teeth are analyzed for the first time, risk assessment and three-dimensional mechanical analysis related to an operation are achieved, and special modeling, risk assessment and tooth extraction resistance analysis can be conducted on the impacted wisdom teeth, especially the impacted mandibular wisdom teeth which are high-risk conditions that the shapes of adjacent neural tubes and tooth roots are complex and resistance sources are diversified; the pull-out difficulty, the resistance source and the intraoperative risk point are reflected, and the clinical use requirements are met.

The present invention relates to the technical field of dental medical treatment, and specifically discloses a method for using a CBCT (Cone Beam Computer Tomography) for automatically positioning a tooth, which comprises the following steps: S01, archiving CT data; S02, calculating AI and generating AI results; S03, entering CT reading by a client; S04, downloading and loading the CT data; S05, opening a function of a tooth lens; S06, selecting a corresponding tooth position in a tooth position list; and S07, selecting a 3D tooth rendering mode. The function of the ‘tooth lens’ is added into traditional CT reading, which is suitable for clinical disease diagnoses such as ‘tooth extraction, root canal therapy, tooth repair’ and the like in oral treatment, and doctors can precisely and quickly position the single tooth through selection for the tooth position, which facilitates more comprehensive analysis.

The invention provides an auxiliary tooth separation method and system for minimally invasive tooth extraction, and relates to the technical field of digital surgery in stomatology. According to the method, the oral anatomy three-dimensional electronic model is obtained by performing deep learning segmentation and three-dimensional reconstruction on the preoperative CBCT image, and the real-time spatial position and posture of the jaw bone are updated in combination with laser oral scanning of the preoperative anterior tooth area. On the basis, a three-dimensional simulation model is constructed, tooth division cutting path planning, interference judgment and dislocation space analysis are completed, precise tooth division cutting is implemented by a three-way mechanical arm along the planned path, and the safe and controllable automatic tooth extraction and tooth division process is completed in cooperation with water cooling and real-time track correction.

The invention discloses an immediate implantation operation method and system based on augmented reality. The method comprises the steps that CT data of the oral cavity and the head of a patient are acquired and subjected to denoising and normalization processing; the method comprises the following steps: constructing oral digital twins of a patient based on CT data, and completing tissue segmentation, key position marking and gravity center calculation; calculating tooth extraction and implantation paths through operation design software, dynamically predicting stress states of the alveolar bone at different implantation angles and depths based on finite element analysis, and generating an implantation planning scheme; accurately registering the digital twin with the oral cavity of the patient by using multi-point identification and an SLAM (Simultaneous Localization and Mapping) algorithm, and establishing a space mapping relation of an implanting tool; a doctor wears AR glasses to carry out surgery operation, a virtual guiding path and implanting depth and angle information are displayed in real time, and a three-dimensional virtual resistance simulation curved surface is overlaid to prompt bone wall resistance changes; tooth extraction and implantation operations are completed according to AR prompts, stable fusion of the implant and a tooth extraction socket or a bone wall is achieved, and data of the whole operation process are recorded for postoperative analysis.

The present invention relates to a method of marking a tooth or teeth for identification purposes by adhering a product to the tooth that is visible to the practitioner under UV (black) light. This disclosure provides a dental bonding agent containing a resin and a component that allows the material to glow under UV black light. In order to prevent wrong-site tooth extraction, the referring dentist, for example, can apply the inventive product to a particular tooth to mark and identify the tooth to be treated by another practitioner. This mark is not visible under normal circumstances (under normal lighting conditions) and therefore would not be noticeable, but identifies the particular tooth by glowing under black light.

The application provides a tooth grinding navigation method, system and storage medium, comprising the following steps: registering to obtain a coordinate conversion relationship between any two of a CT three-dimensional coordinate system, a reference plate three-dimensional coordinate system and an optical three-dimensional coordinate system; calibrating a tooth extraction handset; constructing and optimizing an oral cavity anatomical structure segmentation learning model; segmenting oral cavity CT real-time three-dimensional data; selecting a three-dimensional model of a tooth to be treated in a tooth CT three-dimensional model; obtaining a real-time relative position between the tooth to be treated and the tooth extraction handset; and updating the three-dimensional model of the tooth to be treated in real time according to a running path of a pin tip, and eliminating three-dimensional voxels on the three-dimensional model of the tooth to be treated that coincide with the running path of the pin tip. The oral cavity anatomical structure segmentation learning model can provide assistance for analysis based on oral cavity CT real-time three-dimensional data, and real-time poses of a handset tracker and an oral reference plate collected by a binocular navigator are used to realize visual tooth grinding.

The present application relates to a kind of personalized orthodontic bite gum, the bite gum is used to cooperate with the use of invisible aligner, the bite gum is horseshoe structure in horizontal plane view, it is wedge structure of back thin front thick in sagittal plane view;The bite gum includes bite gum pad, buccal side, lingual side, the buccal side and the lingual side extend to dental arch buccal side and lingual side from the bite gum pad;The bite gum is provided with the avoidance of corresponding arrangement with the invisible aligner, the avoidance is used to avoid weak position on the invisible aligner.The bite gum provided by the present application is mainly aimed at the cases of tooth extraction, tooth defect, replacement tooth period, tooth occlusal surface design, etc.Special device case, by setting avoidance, the bite gum can avoid weak position on the invisible aligner, prevent the deformation of aligner due to the use of bite gum, affect the treatment effect, reduce the use requirement to patient, improve the use efficiency of bite gum, save time.

The utility model provides a saliva absorber during tooth extraction, which relates to the technical field of dental appliances and comprises a microporous support, an outer absorbent cotton layer and a U-shaped clamping piece, the outer absorbent cotton layer is fixed on the outer side of the microporous support in a surrounding manner, the U-shaped clamping piece is arranged above the microporous support, communicating holes are formed in the lower portion of the microporous support in an annular array manner, and the communicating holes are communicated with the outer absorbent cotton layer. The top of the micropore support is fixedly connected with an upper connecting sliding frame, the tail portion of the micropore support is communicated and fixed with a drainage tube frame, the outer portion of the outer absorbent cotton layer is covered with an outer yarn cotton layer in a surrounding mode, and the outer yarn cotton layer is of a net-shaped structure. The microporous stent is in indirect contact with the oral cavity and saliva through cooperation of the outer absorbent cotton layer made of cotton balls, the situation that when an existing guide plastic pipe is in direct contact with the oral cavity, the inner membrane of the oral cavity is damaged is avoided, air suction noise can be eliminated through cooperation of the microporous stent and the outer absorbent cotton layer, and the problems that the plastic pipe only absorbs the saliva locally, the range is small, and the oral cavity is damaged are solved. Meanwhile, the problem that the inner membrane of the oral cavity is damaged due to overlarge force of the flow guide plastic pipe is solved.

The invention provides an accessory device for fixing orthodontics to realize mandibular advancement. The accessory device comprises an upper jaw guide base and a lower jaw guide base, the upper jaw guide plate is arranged at the bottom of the upper jaw guide base, and a convex block is fixedly mounted at the bottom of the upper jaw guide plate. According to the accessory device for fixing orthodontics to realize mandibular advancement, through mutual cooperation of the upper jaw guide base, the lower jaw guide base, the upper jaw guide plate, the lower jaw guide plate and other structures, tooth extraction operation does not need to be carried out in the use process, wounds caused by tooth extraction and potential influences on tooth integrity and oral cavity functions are avoided, and the accessory device is suitable for popularization and application. The trauma of treatment is reduced; meanwhile, as a fixed orthodontic device, the cost is lower than that of an invisible orthodontic mandibular leading scheme, and the economic burden of a patient is relieved; moreover, after fixed installation, a patient does not need to independently wear and manage the device for a long time, dependence on compliance of the patient is reduced, the treatment effect can be more stably guaranteed, and the treatment period is shortened.

The utility model provides a dental minimally invasive tooth extraction simulation device with a pressure feedback system, which relates to the technical field of medical instruments and comprises a base and a support rod. A spherical shell is supported on the base through a supporting rod, and a notch is formed in the spherical shell; the first inductor is used for simulating teeth, the fixing ring simulates a gum, and the upper and lower induction mechanisms correspond to an upper jaw and a lower jaw respectively. By means of the shielding function of the spherical shell and the mask, a dark environment similar to the interior of an oral cavity is created, and the operation of pulling the first inductor out of the fixing ring can simulate the tooth extraction process; whether the first inductor or the second inductor receives abnormal pressure feedback, signals can be transmitted to the controller through the lead-in wire, and then the controller controls the buzzer to make interrupted sound through the lead-out wire, so that problems in the simulation process are prompted, and related personnel are prompted to adjust in time. The problems that an existing dental tooth extraction simulation device is lack of a pressure feedback system and cannot feed back the treatment effect well are solved.

The invention discloses a method for establishing a mouse radioactive jawbone injury animal model, which comprises the following steps of: performing tooth extraction operation, performing radiation treatment after one day, and performing Micro-CT (Computed Tomography) scanning, intraoral examination and histopathologic detection on the lower jawbone on the thirteenth day after radiation so as to determine that the radioactive jawbone injury mouse model is successfully constructed. The animal model has the advantages that the pathological process of human early radioactive jaw necrosis is accurately simulated; the model is stable, good in repeatability and suitable for large-scale experimental research; and a reliable, short-cycle and convenient-to-operate animal model is provided for the mechanism research of radioactive jaw necrosis and the development of new drugs.

This invention discloses a method for preparing biomimetic calcium phosphate particles carrying type III recombinant human collagen, relating to the field of new biomedical materials. The particle formulation, by mass percentage, contains 50%-90% hydroxyapatite and 10%-50% type III recombinant human collagen. The preparation process involves artificially synthesizing hydroxyapatite precipitate, then compounding it with type III recombinant human collagen. The compounded material is then spread, naturally dried, crushed, and sieved to form particles. The resulting particles have a uniform and controllable particle size. When mixed with blood or water, they can quickly form a high-viscosity, malleable, and stable filling material, directly adapting to the site preservation requirements of alveolar sockets after tooth extraction. The advantages are: the degradation rate of these particles precisely matches the bone regeneration rate after site preservation surgery, efficiently guiding bone tissue regeneration while significantly shortening the waiting period for implantation after tooth extraction. This solves the clinical promotion difficulties caused by the long waiting period and complex operation of site preservation surgery, contributing to the widespread application of this technology in oral clinical practice.

An electroactive titanium support-reinforced composite film includes a titanium support and a film material coating the titanium support. The titanium support has a structure designed according to securing sites. The electroactive titanium support-reinforced composite film of the present invention can be bent and shaped for a close fit with a hard tissue, has excellent mechanical performance and a stable electroactive bending strength of bionic magnitude, and can prevent the collapse of surrounding tissues and tissue adhesion, effectively maintain a three-dimensional space for bone osteanagenesis and effectively promote bone injury healing, featuring ease and convenience of clinical operation and capability of promoting bone marrow mesenchymal stem cell adhesion, cytoskeleton rearrangement and induced osteogenic differentiation. The support-reinforced composite film is suitable for mandible or cranium injury repair in different ranges and has significant efficacy for clinical indications such as alveolar bone vertical bone augmentation and alveolar ridge preservation after tooth extraction.

The present invention relates to a system for displaying orthodontic information of an oral cavity and, more specifically, to a system for displaying orthodontic information of an oral cavity, the system being capable of displaying changes in the positions of teeth to be corrected and also displaying a tooth extraction state, by using oral cavity scan data obtained by scanning the shape of a patient's oral cavity for orthodontic treatment. The system for displaying orthodontic information of an oral shape, according to the present invention, enables movements of teeth for the patient's orthodontic treatment to be easily displayed or enables teeth to be extracted to be easily displayed, and enables the shape of the oral cavity after orthodontic treatment and tooth extraction are finished, to be visually displayed in an easy and quick manner, thereby facilitating the establishment of a plan for orthodontic treatment.

The invention discloses a complex tooth extraction digital simulation training system based on endoscope assistance, and relates to the technical field of oral medicine education and digital medical treatment. Comprising a multi-modal anatomical database module used for storing three-dimensional anatomical data, endoscope image data and biomechanical parameter data of an oral maxillofacial region; the endoscope visual field simulation module simulates the dynamic visual field of the endoscope in the virtual oral cavity based on a ray tracing algorithm; the force feedback operation module is used for providing real operation resistance feedback through a mechanical arm operation end and a force sensor; and the operation quantitative evaluation module is used for automatically recording and analyzing operation safety and efficiency indexes. According to the invention, endoscope visual field simulation, operating force feedback and quantitative evaluation in a real anatomical environment are realized, and the problems of insufficient sense of reality, high risk and difficult evaluation in traditional training are solved.

The invention discloses a method and a system for rapidly drawing up an Angler class II malocclusion treatment scheme, and belongs to the field of orthodontics, and the method comprises the following steps: obtaining head shadow measurement data and model measurement data, and distributing a unique variable code for each data; calculating tooth extraction gap values corresponding to all upper and lower jaw tooth extraction combinations based on the obtained tooth crown widths; based on the data after the unique variable code is allocated and the tooth extraction gap value, establishing constraint conditions for the key parameters; all tooth extraction combinations of the upper jaw and the lower jaw are calculated one by one, Z treatment scheme candidate combinations meeting the constraint conditions are screened, and corresponding parameter calculation results are output. According to the method, a more accurate treatment scheme can be provided, the uncertainty of decision making can be effectively reduced in clinical practice, a clinician is helped to judge whether key treatment decisions such as tooth extraction and anchorage selection are needed or not through quantitative analysis, therefore, making of clinical decisions is assisted, and scientificity and accuracy of treatment planning are improved.

This invention relates to a decellularized oral collagen plug and its preparation method. The plug comprises an upper decellularized matrix membrane and a lower decellularized sponge plug. The preparation method is as follows: pretreated fresh animal-derived membrane material is treated with trypsin solution and sodium hydroxide solution, washed with purified water to obtain a decellularized matrix membrane; a portion of the obtained decellularized matrix membrane is placed in a low-temperature tissue ball mill, pulverized, homogenized, filtered, and washed with purified water to obtain a decellularized collagen solution; the decellularized collagen solution is poured into a freeze-drying mold, defoamed under low-temperature vacuum, covered with the decellularized matrix membrane, and after vacuum defoaming, freeze-dried and vacuum thermally cross-linked to obtain the finished collagen plug. This invention's decellularized oral collagen plug is suitable for filling and covering wounds after tooth extraction. The upper decellularized matrix membrane effectively prevents fibroblasts and epithelial cells from invading bone defect areas, while the lower decellularized sponge plug stabilizes blood clots, provides a biological scaffold, reduces postoperative complications, and promotes wound healing.

The utility model relates to the technical field of tooth pulling devices, and provides a saw blade tooth pulling device for a machine tool, which comprises a mounting seat, a fixing plate is fixedly mounted on the bottom side of one end of the mounting seat, a protective shell is fixedly mounted at the bottom end of the fixing plate, and a swing box is fixedly mounted at the bottom end of the fixing plate on the inner side of the protective shell. And a driving motor is fixedly mounted at the bottom end of the swinging box. The tooth pulling structure is arranged, the fixing base is fixedly installed at one end of the limiting rod through the bolt, then the limiting base penetrates through the limiting base, one end of the fixing base is made to be close to one side of the fixing shaft, and the distance between the tooth pulling push needle and the fixing shaft can be adjusted by moving the limiting rod. According to the saw blade tooth pulling device for the machine tool, tooth pulling treatment can be conveniently carried out on saw blades of different specifications on the outer side of the fixing shaft, the function that the device is convenient to adjust the tooth pulling distance is achieved, and therefore the use convenience of the saw blade tooth pulling device for the machine tool is improved.

The invention relates to the technical field of medical apparatus and instruments, and discloses an adjustable decayed tooth extractor which comprises a mounting seat, a first hinge shaft is rotatably arranged on the mounting seat, two tooth extraction forceps are arranged on the first hinge shaft, a drug delivery mechanism is arranged on one tooth extraction forceps, and a liquid extraction mechanism is arranged on the other tooth extraction forceps; the dosing mechanism comprises a medicine storage groove, a piston, a first spring and a plurality of discharge ports, the medicine storage groove is formed in one of the dental forceps, the piston is slidably arranged in the medicine storage groove, the first spring is arranged in the dental forceps, one end of the first spring is connected with the dental forceps, the other end of the first spring is connected with the piston, and the discharge ports are formed in the dental forceps; and the plurality of discharge ports are communicated with the medicine storage tank. According to the adjustable tooth decay tooth extraction device, the position of the jaw can be fixed during tooth extraction, so that a doctor does not need to maintain the position with hands for a long time, one of the forceps parts is used for coating a wound with a hemostatic drug, and the other forceps part is used for sucking bloodstain.

The present application relates to a kind of composite biomaterial for quick hemostasis and bone regeneration after tooth extraction and its preparation method.The composite biomaterial for quick hemostasis and bone regeneration after tooth extraction of the present application includes: dialdehyde starch, chitosan-o-diphenol, gelatin, PRP-loaded response material PEG-SS.Dialdehyde starch, chitosan-o-diphenol and gelatin synergistic effect, can quickly realize physical compression hemostasis, while adding PRP-loaded response material PEG-SS, can realize the slow release of growth factor, extend hemostatic effect, and can support bone regeneration.Further optimization in combination with preparation method, preparation as powder, can be directly filled, and swelling effect is good, hemostasis is fast, can provide long-acting hemostasis and healing support.

The pair of wisdom tooth dislocation pliers comprises a left pliers body and a right pliers body, the front portion of the left pliers body is hinged to the front portion of the right pliers body, a right pliers mouth is arranged on the front portion of the left pliers body, a left pliers mouth is arranged on the front portion of the left pliers body, and the left pliers mouth and the right pliers mouth obliquely extend downwards from back to front. A double-wedge-shaped through groove is formed by the right side of the left clamp beak and the left side of the right clamp beak, a left clamp beak tip is arranged at the end of the left clamp beak, a right clamp beak tip corresponding to the left clamp beak tip is arranged at the end of the right clamp beak, and concave portions are arranged on the right side of the left clamp beak and the left side of the right clamp beak. The tooth extraction device is simple in structure, has double wedge-shaped working ends, can bypass adjacent teeth to enter a mesial gap between an alveolar ridge crest and a target tooth during use, uses a fulcrum of the alveolar ridge crest to apply force to dislocate the target tooth, effectively avoids damage to the adjacent teeth, efficiently realizes extraction of high-resistance normal wisdom teeth and residual roots and crowns, effectively reduces tooth extraction difficulty, reduces tooth extraction wound, and is good in consumer experience.

The invention discloses minimally invasive painless dental forceps, and relates to the technical field of dental medical instruments, the minimally invasive painless dental forceps comprise two symmetrically arranged forceps bodies, each forceps body is composed of a forceps handle and a forceps head, the two forceps bodies are movably connected through a connecting shaft, each forceps body is provided with a minimally invasive painless assembly, the end part of each forceps head is provided with a minimally invasive clamping part, and the minimally invasive clamping parts are connected with the forceps handles. The arc-shaped minimally invasive clamping part is arranged at the end of the forceps head, teeth can be stably clamped, slippage and damage of the teeth in the clamping process are reduced, trauma to gingiva and surrounding tissue is reduced, minimally invasive operation is achieved, and due to the arrangement of a pressure sensor and a temperature sensor, the pressure sensor and the temperature sensor can be used for detecting whether the teeth are damaged or not. The clamping pressure and the temperature of the contact part can be monitored in real time and can be visually displayed through the display screen, a doctor can adjust operation in time according to monitoring data, extra pain and injury to a patient due to too large pressure or too high temperature are avoided, and the painless tooth extraction effect is achieved.

1. Name of the product in this design: Tooth extraction elevator. 2. Purpose of this design: As an auxiliary device during dental tooth extraction. 3. The key point of the design of this product lies in its shape. 4. The picture or photo that best illustrates the design points: Stereoscopic drawing 1.

The utility model discloses a personalized root type implant. Comprising an implant body, a central screw hole is formed in the upper end of the implant body, a Morse taper hole is formed in the upper portion of the central screw hole, and an inner hexagonal base hole is formed in the upper end of the Morse taper hole; the implant made of Ti-Ta alloy is close to a bone tissue of a human body, so that the stress shielding effect is effectively reduced; meanwhile, due to the introduction of tantalum, the corrosion resistance and bone combining capacity of the material are improved; a 3D printing technology is adopted to realize that the implant is completely matched with a tooth extraction socket in shape, and bone holes and convex blocks of a bionic bone trabecula porous structure are constructed on the surface of the interior part of a bone, so that the implant is convenient to mount in a tooth socket; the central screw hole and the Morse taper hole are designed at the upper end of the implant, so that the false tooth is conveniently mounted and connected, and the inner hexagonal base hole is formed at the upper end of the implant, so that the connection stability of the false tooth is conveniently improved, and the false tooth is prevented from rotating and falling off.

The utility model provides a novel invisible orthodontic appliance for integrally adducting anterior teeth in a tooth extraction case, which comprises a bracket-free invisible orthodontic appliance body, the thickness of a rear tooth area of the bracket-free invisible orthodontic appliance body is increased by 0.1-0.25 mm on the basis of the original uniform thickness, the thickness of a distal surface of a second molar is increased by 0.15-0.25 mm, and the thickness of the rear tooth area of the bracket-free invisible orthodontic appliance body is increased by 0.1-0.25 mm on the basis of the original uniform thickness of the bracket-free invisible orthodontic appliance body. According to the bracket-free invisible orthodontic appliance body, a falling prevention piece is designed at a tooth extraction position of the invisible orthodontic appliance, the falling prevention piece is wider in a position close to an occlusal surface and narrower in a position close to a gum, and the size of the falling prevention piece is matched with the change of a gap of the tooth extraction position. According to the application, the back tooth area is thickened on the basis of the original uniform thickness, and the distal surface of the second molar is thickened, so that the anchorage of the back tooth area can be enhanced, and meanwhile, as for the inclination of adjacent teeth in the tooth extraction gap, the anti-collapse piece which is wider in the position close to the occlusal surface and narrower in the position close to the gum is designed at the tooth extraction position; therefore, when the dental crowns of the adjacent teeth on the two sides incline towards the tooth extraction gap, the anti-tilting piece can generate an inclination resisting effect. According to the invention, through the optimal design of the accurate non-uniform thickness, the correction efficiency of the tooth extraction case can be improved.

The application discloses a multifunctional ultrasonic dental elevator special for maxillary third molar root extraction, which comprises a working end, a joint part connected with the working end, and a handle end connected with the joint part; the working end comprises a blade slidingly arranged on the working end, a plurality of elastic members connected with the blade, a plurality of fixing plates connected with the elastic members, and a pulley connected with the bottom of the blade; the blade is connected with the pulley through a plurality of connecting lines; the joint part comprises an upper joint part connected with the working end and a lower joint part; and the handle end comprises a central control system, a blade adjusting button, a water quantity adjusting button, an illumination intensity button, a suction pipe adjusting button and a photographing emergency stop button connected with the central control system. The multifunctional ultrasonic dental elevator integrates multiple functions, avoids the replacement of different instruments during tooth extraction, greatly saves tooth extraction time, and improves the use efficiency and use range of the dental elevator.

The utility model discloses a dental instrument. The dental instrument comprises an anchorage module, a segment type shell-shaped body, a first traction part arranged on the anchorage module and a second traction part arranged on the segment type shell-shaped body or teeth in an anterior tooth area, the anchorage module is connected to teeth in the posterior tooth areas of a patient in a matched mode and comprises a first retention connected crown, a second retention connected crown and a palate connecting rod which are connected to the posterior tooth areas on the left side and the right side of the patient in a matched mode respectively, the first retention connected crown is fixedly arranged on the first tooth in a sleeving mode, and the second retention connected crown is fixedly arranged on the second tooth in a sleeving mode. The first teeth and the second teeth corresponding to the rear tooth areas on the left side and the right side are bound into a whole through the palate connecting rod to form an integral anchorage; the fragment type shell-shaped body is used for binding teeth in an anterior tooth area of a patient into a whole and comprises a plurality of dental crown accommodating cavities for wrapping the teeth in the anterior tooth area of the patient; during wearing, the elastic traction part is hooked between the first traction part and the second traction part, so that teeth in the anterior tooth area move towards the posterior tooth area to close a gap generated after tooth extraction.

The invention relates to a bionic collagen matrix with a density gradient double-layer structure, and belongs to the technical field of medical materials. The collagen matrix takes telopeptide collagen derived from mammalian dermis or achilles tendon as a main component, and comprises a double-layer structure of a compact layer and a loose layer, and the compact layer is smooth in surface and compact in structure, so that cell migration can be blocked, and a certain protection effect is achieved; the loose layer is of a porous structure, cell ingrowth and blood clot stabilization are facilitated, and a support is provided for tissue repair. The preparation method of the biological membrane comprises the following steps: preparing telopeptide-removed collagen gel, preparing collagen sponge, preparing a collagen tissue regeneration membrane, and compounding the collagen tissue regeneration membrane and the collagen sponge into an integrated double-layer structure through bonding, drying and crosslinking. The double-layer structure simultaneously meets the double requirements of barrier protection and tissue regeneration, the process is simple and controllable, and the double-layer structure is suitable for clinical scenes such as oral soft tissue repair, alveolar ridge reconstruction and tooth extraction pit coverage.

The utility model relates to medical instrument technical field especially is involved in tooth forceps, including the first handle and second handle of split type design, the first handle front end is connected with the first bill, the second handle front end is connected with the second bill, and the first bill and the second bill are articulated through the fulcrum pivot between, be provided with the connecting rod adjusting mechanism for adjusting the fulcrum pivot position on the first handle, and the connecting rod adjusting mechanism includes with slide rail assembly and multilink linkage assembly, and slide rail assembly extends along the first handle inner surface axial direction, and slide rail assembly and multilink linkage assembly one end swing joint, multilink linkage assembly is connected between the fulcrum bearing and slide rail assembly, and one end of multilink linkage assembly is fixed on the second handle, the utility model discloses through setting adjustable clamping fulcrum structure, realizes the adjustment to the mouthful of clamping fulcrum position, to adapt to the anatomical form of different tooth root, reduces the risk of crown fragmentation, and promotes the efficiency and safety of tooth extraction operation.

The application provides tooth extraction socket filling hemostatic material and a preparation method thereof, and relates to the technical field of tissue repair materials.The tooth extraction socket filling hemostatic material provided by the application comprises the following components in parts by mass: bioactive ceramic powder 0.1-10 parts, glycerol 0.1-4 parts, starch 2-10 parts, solidification liquid 0.01-3 parts and plasticizing agent 0.01-5 parts.In the tooth extraction socket filling hemostatic material, the molecular chain of the starch is significantly stretched after the starch is infiltrated by glycerol rich in hydrogen bonds, so that the amount of exposed hydroxyl groups is increased, the recruitment of blood cells is accelerated, the formation of blood clots is accelerated, and the adhesion strength of the material to the tissue is significantly increased.The addition amount of the bioactive ceramic powder, glycerol, starch, solidification liquid and plasticizing agent is controlled, so that the tooth extraction socket filling hemostatic material has the function of plasticity, rapid hemostasis can be realized, the wet adhesion is good, and stability can be maintained in the oral environment.