42 results about "Dental impaction" patented technology

The invention relates to the technical field of biological materials and clinical medicine, and provides an injection, a preparation method of the injection and application of the injection in dentalpulp regeneration. The injection comprises a composite preparation as a dispersion phase and a dispersion liquid as a continuous phase. The composite preparation comprises a drug, a microcarrier and stem cells, the drug is wrapped in the microcarrier, and the stem cells are attached to the surface of the microcarrier. The dispersion liquid is selected from at least one of a group consisting of a balanced salt solution, a serum-free culture medium and injectable hydrogel. The injection is mainly applied to regeneration of clinical functional dental pulp tissues, and regeneration of dental pulpin affected root canals is realized. By utilizing the injection, the formation of the nerve and vascularized dental pulp-like tissue in the root canal can be realized, the nutrition, defense and sensory functions of the dental pulp tissue are recovered, and the service life of the affected tooth is prolonged.

The invention discloses a treatment guide plate for root canal treatment. The treatment guide plate comprises a closing plate, and the closing plate comprises a matching surface matched with a tooth crown shape of a part of teeth or all teeth of an affected tooth or an affected tooth and an adjacent single tooth. Guide holes corresponding to corresponding root canals are formed in the closing plate, one end of each guide hole is located in the matching surface, the position design of the guide holes depends on the three-dimensional stress finite element analysis of the teeth, and a mechanical strut region of the teeth is avoided; when a drill pin penetrates through the corresponding guide hole to drill a marrow hole of the affected tooth, the mechanical strut structure of the affected tooth cannot be damaged by the drill pin, and the anti-stress structure of the tooth is protected; the teeth are prevented from being cracked when biting hard objects after operations. The invention further provides a preparation method. The preparation method of the treatment guide plate for root canal treatment is simple, mature and easy to popularize, and the prepared treatment guide plate effectively avoids damage to the mechanical strut structure of the affected tooth, so that the teeth can be prevented from being cracked when biting the hard objects after the operations.

The invention relates to a root-end surgery guide plate. A guide plate body includes a tooth surface part matched with a clinical dental crown and a bone surface part matched with an alveolar bone. The tooth surface part includes a snapping surface part matched with a snapping surface of the clinical dental crown, a tongue surface part and a lip surface part. The tongue surface part and the lip surface part are disposed on the two sides of the snapping surface part and matched with a tongue surface and a lip surface of the clinical dental crown respectively. The snapping surface part is provided with a retention indicating window. The bone surface part is provided with a guide plate positioning hole matched with a root-end surgery instrument, and the upper edge and the lower edge of the guide plate positioning hole are located at the 1-4 mm position and the 1-3 mm position above and below root-ends of tooth roots of offending teeth respectively. According to the root-end surgery guideplate, on the one hand, the fitness of the guide plate and a tooth jaw is judged, and operation accuracy is improved; on the other hand, the operation position, angle and direction in a root-end surgery can be precisely positioned through the guide plate positioning hole, and a root-end in a lesion area is removed precisely.

The invention discloses a NiTi memory personalized self-expansion thread groove embedded porous structure dental implant and a preparation method thereof. The preparation method mainly comprises the following steps: performing mesh adjustment and surface fitting on the obtained ill tooth data, to obtain a relatively smooth ill tooth model. The crown part is separated from the root part by a cutting plane, and a base station is designed at the root top of the dental implant according to the required retention force; thread groove embedded porous structures are distributed at the root bottom; and the root is 3D-printed from NiTi alloy with a memory effect, and has a round-trip effect after training. Phase change of the root at the phase-transition temperature point of human body temperatureleads to deformation; the entire dental implant has a self-expansion effect so that the root automatically fills up the gum and has pretightening force; and with the thread groove embedded porous structures, in the case of deformation, the deformation of the embedded porous structures exceeds the deformation of the dental implant, and the embedded porous structures extend out of the groove to forma thread-like structure; and thus, the contact area is increased, and a fixing effect is realized so that the dental implant does not get loose easily.

The invention provides an isolation device used for isolating droplet transmission during oral cavity treatment. The isolation device comprises an inner ring face bow laminated to the periphery of theoral cavity, and an outer ring face bow for blocking the face, wherein the inner ring face bow and the outer ring face bow are in sealing connection through rubber cloth to form a horn-shaped structure; and the upper part of the outer ring face bow is connected with a bracket component used for supporting a nose space. The device can guarantee that a diseased tooth treated in the dental department is completely isolated from the oral cavity and the face of a patient so as to effectively avoid a risk that a liquid is in contact with the face of the patient in a treatment process, meanwhile, the patient breathes with the nose in the treatment process but does not directly inhale liquid drops splashed in the treatment process, and under a condition that a primary air system is cooperated, the patient can be prevented from inhaling aerosols polluted by treatment in consulting room. Even during a respiratory infectious disease outbreak period, the effective isolation and protection of thepatient can be guaranteed, and the treatment of oral cavity diseases is not hindered. Therefore, the device is suitable for being generally applied to dental department treatment.

The invention provides an inflammation-diminishing paste for dental pulp. The inflammation-diminishing paste for the dental pulp is prepared from an active ingredient; the active ingredient is prepared from the following components in parts by weight: 10-40 parts of iodoform, 10-40 parts of metronidazole, 10-40 parts of ciprofloxacin and 5-20 parts of chitosan. The inflammation-diminishing paste for the dental pulp has the technical effects that 1, the inflammation-diminishing paste has better antibacterial and anti-inflammatory effects, is stable and lasting in efficacy and high in permeability, and is capable of promoting the recovery of normal physiological functions of the dental pulp, thus remarkably improving the success rate of vital pulp preservation of diseased teeth; 2, during clinical use, compared with the traditional root canal therapy, the inflammation-diminishing paste for the dental pulp is simple and convenient in operation by oral clinical doctors and short in treatment time; after the inflammation-diminishing paste for the dental pulp is used, the subsequent visit times of a patient are reduced, and the treatment efficiency of dental pulp diseases is greatly increased. Mechanical preparation does not need to be carried out, so that root canal wall tissues are prevented from being damaged for a second time, and the risk of fracture of teeth is reduced.

The invention discloses a preparation method of an embedded guide plate for precise positioning of an embedded root canal. The preparation method comprises the steps that by constructing a corresponding three-dimensional model, a scene of precise matching of a surgical instrument with a target root canal in a target tooth is simulated so as to obtain a preoperative planning path of the surgical instrument; then relevant parameters of the embedded guide plate for precise positioning of the target root canal are obtained according to the preoperative planning path; and then the embedded guide plate is prepared according to the relevant parameters. The personalized embedded guide plates can be prepared for each target tooth in a residual root / residual crown state so as to ensure the precise positioning of the target root canal in each target tooth, the clinical time for finding the root canal (especially a mutated root canal) is significantly shortened, the risks such as side penetrationand bottom penetration are reduced, the success rate of the operation is increased, and thus the affected teeth are effectively retained. Correspondingly, the invention further provides the guide plate for precise positioning of the root canal, a preparation system of the guide plate, application and a precise positioning method for the root canal.

The invention relates to a gypsum-free novel digital post-core impression collection and model building technology, and belongs to the technical field of post-core restoration of prosthodontics. The technology comprises the steps as follows: making local impression of a diseased tooth and performing optical scanning to obtain complete post canal information; performing optical scanning on the dentition and occlusion relationship in the mouth of a patient to obtain a digital model of the abutment crown shape, dentition and occlusion relationship; and matching the digital model established by optical scanning of the traditional post-core impression with the established dentition digital model to obtain the dentition and occlusion relationship model containing the complete post canal information, and performing subsequent design and processing of the root post and crown core. The defect that the complete post canal information cannot be obtained by direct oral scanning is avoided, and thedefect that complete crown information cannot be obtained when the abutment crown grows up and post-core impression is scanned is also avoided. The digital model obtained based on the technology canbe used for computer aided design, and then combined with 3D printing or CAD / CAM technology to achieve stable and accurate digital machining.

The invention discloses a preparation method of a 3D printing implant tooth. The preparation method comprises the following steps: step S1, acquiring tissue structures of residual tooth roots and alveolar bones of an affected tooth of a patient and medical image data of shapes of the residual tooth roots of the affected tooth and normal teeth on two sides of the affected tooth; step S2, performingpost-restoration processing on the medical image data acquired in the step S1, and establishing a three-dimensional model of an implant, a three-dimensional model of a fixed abutment and a three-dimensional model of a dental crown; step S3, performing format conversion on the three-dimensional model of the implant, the three-dimensional model of the fixed abutment and the three-dimensional modelof the dental crown, and importing the converted data into a 3D printer; and step S4, printing and forming the implant and the fixed abutment by the 3D printer. The implant tooth prepared with the method has the advantages of being accurate in size and shape, hard to distinguish from the true and false appearance of the true tooth, simple in process and high in good sensation of the patient usingthe implant tooth.

The invention provides a full-digital design method for synchronously designing a tooth pile core and a crown by a computer. The method comprises the following steps of: synchronously completing pile path preparation and full-crown abutment tooth preparation for an affected tooth to obtain a silicone rubber impression including the pile path of the affected tooth and the full-crown abutment tooth form; modeling an impression scanning piece; designing a personalized pile core, and cutting and manufacturing a digital pile core by referring to an STL file; changing the gap of the pile core binder to a negative value at the beginning of the pile core design, so that the designed and output new pile core can smoothly penetrate into the digital model of the remaining tooth body, thereby fitting the new pile core and the remaining tooth body into a whole; and designing a full crown to achieve full-digital synchronous design of tooth pile cores and crowns. According to the method, the full crown can be immediately designed on the basis of the digital pile core after the digital pile core is designed by the computer, the pile core, the tooth body and the full crown are tightly combined at the computer level, the defects of an existing digital pile core technology are overcome, and the purposes of optimizing design steps, shortening the pile core and crown repair period of a patient and simplifying the manufacturing process of a technician are achieved.

The invention provides a plug-type post-core integrated crown suitable for the posterior tooth occlusal gingival restoration with a space less than 3 mm. The plug-type post-core integrated crown comprises a main body, a plug channel and a plug, wherein the main body comprises a crown part and a pulp cavity part, the crown part restores the shape and occlusal relationship of an affected tooth, andcovers and envelops a prepared body of the affected tooth, the pulp cavity part is located in a pulp cavity of the affected tooth, and matches the shape of the pulp cavity to obtain the retention force, and the plug passes through the plug channel of the main body and extends into a prepared post channel in the root canal to obtain retention. The plug-type post-core integrated crown suitable for the posterior tooth occlusal gingival restoration with a space less than 3 mm has the advantages of good retention, no need to adjust and grind a contralateral tooth, little damage, and good aesthetics, provides a good and novel restoration body used for the restoration of dental defects for such patients, and is especially suitable for the case that a posterior tooth restoration occlusal gingivalspace is too small to apply conventional crown restoration and post core + crown restoration.

The invention provides a root canal treatment guide plate and a preparation method thereof. The root canal treatment guide plate includes a base, a guide seat arranged on the base, and a guide deviceinstalled on the guide seat, wherein the base is fixed to an affected tooth in an attaching mode during treatment, and the guide seat is connected with the base through a positioning connection structure, the guide device is provided with a root canal guide channel, the guide device is installed on the guide seat according to the direction of a root canal channel of the affected tooth, and a rootcanal treatment instrument is guided by adaptively adjusting the direction and position of the root canal guide channel during the treatment to position a root canal of the affected tooth through theroot canal guide channel. According to the root canal treatment guide plate, adaptively fine-adjusting can be carried out during a matching process of the guide plate channel and the root canal channel, and therefore the positioning accuracy of the root canal of the affected tooth is improved.

The invention relates to the field of dental equipment, in particular to a positioning device for apical surgery and a preparation method of the positioning device. In order to reduce the risk of theapical surgery, improve the treatment quality and enable the long-term prognosis to develop well, the invention provides a positioning device for the apical surgery, which is characterized in that theperipheral side surface of a supporting plate is a convex arc surface; a positioning plate is located on the top face of the supporting plate and close to the peripheral side face of the supporting plate; a positioning through groove is formed in the positioning plate and is close to or located at the positioning end, away from the supporting plate, of the positioning plate; a positioning accessory is clamped in the positioning through groove; and a positioning guide through hole penetrating through the inner wall and the outer wall of the positioning accessory is formed in the positioning accessory. During use, the supporting plate is located between upper teeth and lower teeth of a patient, the positioning accessory is abutted against affected teeth, and the positioning guide through hole is located in the excision position of the root apex of the affected teeth. By using the positioning device for the apical surgery, the surgical risk can be reduced, the treatment quality can be improved, and long-term prognosis can be well developed.

The invention discloses a method for preparing a 3D printed dental implant, comprising the following steps: Step S1: Obtaining the tissue structure of the patient's remaining tooth root and alveolar bone, the remaining tooth root of the diseased tooth, and the shape of normal teeth on both sides of the diseased tooth The medical image data; Step S2: Perform post-repair processing on the medical image data obtained in step S1, and establish a three-dimensional model of the implant, a three-dimensional model of the fixed abutment, and a three-dimensional model of the crown; step S3: Convert the format of the three-dimensional model of the implant, the three-dimensional model of the fixed abutment, and the three-dimensional model of the crown, and import the converted data into a 3D printer; Step S4: Printing and forming by the 3D printer The implant and the fixed abutment. The dental implant produced by the invention has the advantages of accurate size and shape, indistinguishable appearance from real teeth, simple process, and high favorability of patients using the dental implant.

The invention discloses a method for preparing a 3D printed porous root-shaped dental implant. Firstly, CBCT is used to shoot the medical image data of the patient's maxillofacial region, and the medical image data of the maxillofacial region is imported into 3D image generation and editing processing software. Convert and export the STL format file of the affected tooth; use the STL format file of the affected tooth to obtain the STL fitting model of the affected tooth; then import the STL fitting model of the affected tooth into the 3D modeling software for reverse reconstruction and forward design of the implant ; Finally, the 3D printing equipment prints the implant. The dental implant prepared by the invention can increase the contact area with normal bone through the pores on the surface, ensure the ingrowth of osteoblasts, accelerate the rate of clinical osseointegration, and make the dental implant more stable.

The invention discloses a method for manufacturing a personalized root canal filler by utilizing a 3D printing mode. The method comprises the following steps: acquiring a CBCT (cone beam computed tomography) image of an affected tooth, reconstructing a three-dimensional model of a tooth root, performing 3D printing and manufacturing the filler. The personalized filler obtained through the method is highly matched with the prepared three-dimensional shape of the root canal, micro leakage can be reduced, the operation process can be simplified, the treatment time can be shortened, heat damage to periodontium can be avoided when the personalized filler is used for filling the root canal, and therefore the personalized filler can be widely applied to the technical field of root canal treatment.

The invention discloses a gingival flap traction protector which comprises a handle, a first working end and a second working end. The two ends of the handle are connected with the first working end and the second working end respectively; the first working end and the second working end are shovel-shaped; the shovel-shaped area of the first working end is larger than that of the second working end; the minimum thickness of the first working end is larger than that of the second working end; the tip of the convex surface of the first working end is inwards sunken to prop against the top of analveolar ridge after flap of the affected tooth; an operation field is fully exposed, gingival nipples are avoided, periodontal soft tissues are protected, accidental injuries caused by the fact thatthe soft tissues are drawn in by a bur belt can be prevented, the number and frequency of instrument replacement of a doctor in an operation can be reduced, the operation efficiency is improved, and infection possibly caused by frequent instrument replacement is reduced; and the working end is flatter, so that the sharpness of the blade part is reduced, possible artificial slippage or accidental injury in the operation process is reduced, and the operation safety of doctors is improved.

The invention discloses a multi-root implant tooth structure. The multi-root implant tooth structure is characterized by comprising a plurality of tooth root and abutment integrated structures, wherein the tooth root and abutment integrated structures are connected with one another. The bolt type assembled multi-root implant tooth structure is completely consistent with a multi-root tooth structure of a patient, and can be completely matched with a tooth socket after an affected tooth is pulled out, so that the clinical treatment process is simplified, the treatment cycle is greatly shortened, meanwhile, atrophy and collapse of soft tissues after tooth extraction can be effectively prevented, absorption of alveolar bones after tooth extraction is reduced, and the comfortable and beautiful effects of the patient can be improved. The bolt type assembled multi-root implant tooth structure is completely matched with the tooth socket of the patient, and has relatively high initial stability, so that an operator does not need to adopt a special implantation technology to increase the initial stability, the technical operation requirements on the operator and the infection risk of the postoperative patient can be greatly reduced, meanwhile, synostosis of an implant can be accelerated, and the implantation success rate is improved.

The invention discloses a dentarpage for a stomatology department. The dentarpage comprises a support plate, a threaded rod that goes through the support plate, and a nut, which sleeves on the threaded rod. The dentarpage also comprises two joint parts, which are arranged on two ends of the support plate. The joint parts comprise sleeves. Two sleeves of the joint parts sleeve on the normal teeth,which are on two sides of an infected tooth respectively. The sleeves sleeve on the normal teeth, when the threaded rod is drilled into the infected tooth, the force on the support plate is applied onthe normal teeth through the sleeves of the joint parts, thus the support plate will not be directly pressed on the normal teeth, and the damage of the normal teeth is avoided.

The invention relates to the technical field of medicine, and provides a dental stake removal guide plate, a system and a design and a manufacturing method of the dental stake removal guide plate. The dental stake removal guide plate comprises a supporting and fixing part and a restraining and guiding part, the supporting and fixing part is used for being arranged on a diseased tooth and an adjacent tooth, and the supporting and fixing part is provided with an exposure space for exposing the diseased tooth; the restraining and guiding part is arranged on the supporting and fixing part, a channel allowing the head of the dental handpiece to move is formed in the inner side of the restraining and guiding part, the channel is communicated with the exposure space, and a first opening allowing the neck of the dental handpiece to move is formed in the restraining and guiding part and is communicated with the channel. The restraining and guiding part arranged on the supporting and fixing part can serve as a guiding structure of the dental handpiece, so that a handpiece head of the dental handpiece stably moves in a channel of the restraining and guiding part, and a post core is ground to be removed.

The invention discloses a personalized occlusal surface transparent silicone rubber guide plate and a method for preparing the transparent silicone rubber guide plate and assisting in filling the affected teeth. The filling method of the invention comprises the following steps: 1) when the dental caries is present but the anatomical shape is intact or the dental defect exists, glass ionomer is used to quickly restore the shape; 2)applying a rubber barrier to the tooth and drying the tooth surface; 3) for that adjacent surface, a bean flap adjacent surface forming system and a flowable resin are used to make a personalized adjacent surface forming system, and for the occlusal surface, a transparent silicone rubber guide plate is used to make the personalized occlusal surface transparent silicone rubber guide plate; 4) dental caries removal and dental preparation; 4) filling that diseased tooth with a large block of resin, then, the personalized adjacent face forming system and the personalized occlusal transparent silicone rubber guide are reset to the affected teeth, and the light is cured after pressing and sealing; 5) adjusting that occlusion and polishing of the diseased tooth.The method can restore the original anatomical shape, occlusion relation and adjacent relation of the diseased tooth, save the resin material, reduce the treatment time and improve the treatment quality.

The invention discloses a negative pressure device attached to tooth tissue, which belongs to the technical field of negative pressure devices attached to tooth tissue. A slider is slidably connected, a push rod is welded on one side of the slider surface and the push rod is located on the surface of the shell, a suction port is opened on one side of the shell surface, and a limit frame is welded on the side of the slider close to the suction port, so There are four supporting springs welded on one side of the surface of the shell, and the surface of the supporting springs is wrapped with a medical sealing sleeve, and the medical sealing sleeve wrapped on the surface of the supporting spring is close to the affected tooth. At this time, the negative pressure machine generates suction, and the supporting springs Under the action of suction, it will be deformed and tightly attached to the affected teeth, so that there is no need for grinding and matching treatment. During adsorption, a filter frame is installed on the surface of the shell, which will intercept some of the larger diseased tissues. Provide convenience for subsequent inspection and processing.

The invention discloses a minimally invasive tooth extraction device which comprises a tooth extraction device, wherein the tooth extraction device consists of a handle, a cutter rod and a cutter edge. The minimally invasive tooth extraction device has the beneficial effects that the minimally invasive tooth extraction device can be used for minimally invasive extraction of various ill teeth, broken tooth roots and residual tooth roots; the investment of dental apparatuses is reduced; medical resources are saved; the labor and sterilization cost is reduced; the design method is simple; the mastering by a user is easy; and the problems of great quantity of ordinary minimally invasive tooth extraction cutters, great space occupied by the handle, high sterilization frequency and high cost aresolved.

The invention relates to the technical field of oral restoration equipment, and specifically discloses a veneer restoration colorimetric system and a manufacturing method thereof. The female mold is filled with different tooth color resins respectively to make resin abutments of different shades, and they are arranged in the order of specified shades, and the digital images before and after the preparation of the standard tooth model are obtained by using a scanner. , Using the replication method, CAD / CAM computer-aided design of the veneer whose surface morphology is consistent with the prepared part of the standard tooth model, selects different materials for veneer production, and arranges them according to different material classifications. The invention can be consistent with clinical practice, fully consider the influence of porcelain material, adhesive tone, and abutment color on the final aesthetic effect of the restoration, and select the color of the resin abutment and veneer combination to predict the color of the veneer restoration with the best effect. , restore the natural aesthetic effect of the affected tooth.

The invention relates to the technical field of dental restoration equipment, and particularly discloses a veneer restoration body colorimetric plate system and a manufacturing method thereof. The method comprises the following steps that veneer preparation is performed on a standard tooth model to form standard-form abutment teeth; a corresponding female die is manufactured according to the standard-form abutment teeth; the female die is filled with resin with different tooth body colors to manufacture resin abutment teeth with different hues, and arranging is performed according to a specified hue sequence; digital images before and after standard tooth model preparation are prepared by using a scanner, and through a copying method, veneers of which the surface forms are consistent withstandard tooth model preparation parts are designed by CAD / CAM computer assistance; and different materials are selected to manufacture veneers, and arranging is performed in a classified mode according to different materials. The method can be consistent with clinical practice, the influence of porcelain materials, adhesive hues and abutment tooth colors on the final aesthetic effect of the restoration body is fully considered, resin abutment tooth and veneer combined color selection is performed, the color of the veneer restoration body is predicted with the optimal effect, and the natural aesthetic effect of affected teeth is recovered.

The invention discloses an individualized proximal surface forming system, a preparation method thereof and a method for auxiliarily filling an offending tooth. The filling method comprises the following steps that (1) the proximal surface of the offending tooth has caries while the dissected appearance is intact, or tooth defect exists, and then the appearance is rapidly recovered by using glassionomers; (2) the individualized proximal surface forming system of the offending tooth is prepared; (3) the caries of the offending tooth is removed, and the tooth body is prepared; (4) the individualized proximal surface forming system is reset, that is, a retention ring along with cured flowing resin are reset at the target offending tooth, so that a bean-shaped forming sheet is tightly attached to the position between the offending tooth and the flowing resin; and (5) the target offending tooth is filled with resin, the resin filling material being subjected to illumination curing is occluded and adjusted, the occlusion interference point is ground and removed, and the resin filling material is polished. The method can restore the original proximal surface contact relation and the abduction gap anatomic form of the offending tooth, the grinding and adjusting time after filling is shortened, and the filling postoperative complications such as food impaction, obturator overhang and obturator fracture are reduced.

The invention discloses a preparation method of an embedded guide plate for precise positioning of embedded root canals, which simulates the scene of precise matching of surgical instruments and target root canals in target teeth by constructing corresponding three-dimensional models, so as to obtain the preoperative Plan the path, and then obtain the relevant parameters of the embedded guide plate for precise positioning of the target root canal according to the preoperative planning path, and then prepare the embedded guide plate according to the relevant parameters, which can be used for the target of each residual root / crown state The personalized embedded guide plate for tooth preparation ensures the precise positioning of the target root canal in each target tooth, which significantly shortens the time for clinical root canal search (especially for variant root canals), and reduces the risk of side penetration and bottom canal Wear and other risks, improve the success rate of surgery, thus effectively retaining the affected teeth. Correspondingly, the present invention also provides a root canal precise positioning guide plate, its preparation system, application, and a root canal precise positioning method.

The invention provides an open-face preformed dental crown which comprises a crown body and a crown face buckled on teeth, the crown body and the crown face are integrally formed, the crown face is located at the upper end of the crown body, an opening (3) is formed in the crown face, and the opening is located in the center of the crown face; and the crown body is in a shape with the middle protruding and the neck edge narrowing slightly, the crown body is hollow and communicated with the opening, the crown body is connected with the crown face through an arc, and an inverted buckle support is further arranged on the crown face. The invention further provides a using method of the open-face preformed dental crown. The using method comprises the following steps: (1) preparing a tooth; (2) selecting a model; (3) wearing; (4) filling; and (5) adjusting occlusion. According to the method, a diseased tooth repairing process can be completed in one step, namely, after caries tissue of a caries tooth is removed, the caries tooth is directly tried on and bonded with the open-face type preformed dental crown, then the opening is filled with a dental light-cured resin material so as to form the occlusal surface, customization is not needed, use is convenient, time is short, problems can be solved at that time, efficiency is high, and cost is low.