169 results about "Tooth Preparations" patented technology

The invention provides a digital oral fixed restoration method and device. Preparing and planning of a tooth preparation are completed by obtaining a three-dimensional digital model of an oral cavity of a patient before a dentist prepares the tooth preparation, and the tooth preparation is cured on a specially-made cutting guide plate, thereby greatly improving the quality of the tooth preparation prepared by the dentist and improving the efficiency of preparing the tooth preparation prepared by the dentist by the cutting guide plate. Furthermore, the invention can provide a complete set of digital scheme for oral fixed restoration, namely, simulation cutting of the three-dimensional digital model of teeth of the patient is completed in a computer, thereby acquiring a three-dimensional digital model of the tooth preparation of the patient; the oral fixed restoration body can be directly and digitally designed and manufactured on the basis. By virtue of the digital oral fixed restoration method and device, the tooth preparation cutting guide plate of the patient and the restoration body can be delivered to the dentist and the patient together; the patient can directly wear the individually designed and manufactured restoration body during accurate preparing of the tooth preparation; the efficiency and the effect of oral fixation can be greatly improved.

The invention relates to a preparation method of an aesthetic all-zirconia restoration body. The process comprises the steps of: clinically making an impression and a model after tooth preparation, collecting the digital impression, establishing a digital model, designing the shape of the restoration body by being assisted with a computer, cutting into the shape of the restoration body by a digital control lathe, try-wearing on the model, adjusting the outline form, polishing, coloring, glazing, and completing the fabrication of final restoration body. The restoration body is colored by using a coloring zirconia porcelain piece; the coloring process is influenced little by personal factors; an all-zirconium-crown cutting end transparent handling liquid is used to handle the presintered tooth crown, so that the color and the transparence of the zirconia all-porcelain tooth change gradually, so that an ideal aesthetic effect is achieved. The preparation process is free of porcelain coating. The method has no porcelain fracture danger, and the operation is simple. The prepared tooth is few, so 1mm of preparation space is enough to use. The zirconia all-porcelain tooth has excellent biocompatibility, high strength, good transparence and glossiness, and natural and lifelike colors. CAD / CAM (Computer-Aided Design / computer-aided manufacturing) is used for designing and completing the processing, thereby ensuring the marginal adaption and precision of the zirconia all-crown porcelain tooth.

The invention relates to a method for preparing a veneer ceramic-free full anatomic form zirconia dental crown. The method comprises the steps of: adopting a CAD (Computer-aided Design) / CAM (Computer-aided Manufacturing) system, and clinically fabricating an impression and a plaster model after tooth preparation; scanning by using a three-dimensional model scanner, establishing a digital model ona computer, and designing a dummy form through computer assistance; cutting a dummy form through a numerically-controlled lathe, trying wearing on the model, and adjusting the form; burnishing; painting; and glazing, and finally completing the fabrication of the dummy. The veneer ceramic-free full anatomic form zirconia dental crown provided by the invention has high strength and good light transmission, the treatment of applying ceramics is not required, and no hazard of ceramic fracture exists; the degree of precision is high due to computer control during the overall process; and the grinding amount for tooth preparation is small, and an ideal effect can be achieved with 1mm space.

The invention relates to a numerical control laser automatic tooth preparation method and equipment thereof. The equipment contains an intraoral spatial digitizer, a dental laser, a numerical control laser tooth preparation control system intraoral working end, an oromaxillo-facial region cone-beam CT machine, a computer, a tooth fixator and a negative pressure aspirator. The computer is respectively connected with the intraoral spatial digitizer, the dental laser, the oromaxillo-facial region cone-beam CT machine and the negative pressure aspirator. The dental laser is connected with the numerical control laser tooth preparation control system intraoral working end which is connected with the tooth fixator. The equipment can replace part of manual operation of a doctor. A traditional mechanical grinding apparatus is replaced with laser. Clinical therapy operative level of grass-roots doctors can be effectively raised within a short period of time, and diagnosis and treatment efficiency and quality can be improved.

A device for creating interproximal contacts of restorations placed between posterior and anterior teeth comprising a single or plurality of dental inserts which is sized and dimensioned and can be inserted into unset restorative material and compacted so as to exert lateral forces in the interproximal areas of tooth preparations thereby creating tight anatomical and functional interproximal contacts. A method of use of said dental inserts is also described.

A method for producing a dental restoration wherein a tooth preparation area is scanned either directly or indirectly. The scanned data is used by a computer controlled milling machine to create two or more investment blocks (50, 52, 54) for preparing a suitable dental restoration, the investment blocks being of a material which may be used in ovens operating in a 800° to 1,200° C. range. A suitable dental restorative material (18) and the blocks are place in an oven, and after being clamped together, the material (18) is pressed or injected into the investment blocks to form the desired dental restoration. Subsequently, after cooling, the dental restoration is divested from the investment mold and finished.

The invention discloses a tooth preparation-based data flexible fusion method, and belongs to the field of CAD (computer aided design). The method comprises four steps: data collection and pretreatment; characteristic curve self-adaptive extractive technique; data pre-registration; data dynamic registration. According to the method, only simple man-machine interactive operation is included; the degree of automation is high; a fused model not only has high-precision surface information, but also has a perfect internal structure; due to complete information which truly reflects a physical model, efficiency and accuracy of subsequent design and manufacturing can be improved; the method has important application value in the field of CAD for the oral cavity.

The invention discloses a computer-aided design making method for a dental personalized integrated non-metal post core. The method comprises the following steps of: 1, performing tooth preparation to make a silicon rubber impression duplication defect tooth form; 2, acquiring impression three-dimensional data by using a high-accuracy optical scanner; 3, selecting a proper crown core from a database; 4, finishing stitching and processing of defect root canal and section data and crown core data through three-dimensional design software, and establishing a virtual model for the personalized integrated post core; and 5, importing post core data in an STL (Standard Template Library) format into a computer-aided making numerical control center, and selecting a proper non-metal blank to process into a personalized integrated post core entity. Through the computer-aided design making method for the dental personalized integrated non-metal post core, the processes of perfusion of a plaster model, making of a wax pattern and the like are saved, a processing period is shortened, a making error is reduced, higher accuracy can be achieved, the post core entity and the remaining tooth tissue have better fitness, the fracture resistance of a post core prosthesis can also be enhanced, and the risk of repair failure is reduced.

A burr (30) includes a spherical cutting element (36) and a shield (40) integrally placed behind the burr. The shield is circularly configured, has a rounded periphery and is provided with a smooth tooth-engaging surface. The shield thus insures that the depth of the penetration—into the tooth is precise, as predetermined, without inflicting deleterious harm to the tooth. The present invention further relates to a method, utilizing the shield, for precise tooth preparation of porcelain veneers and porcelain crowns.

The invention provides a tooth preparation body digital model design method, and belongs to the field of computer aided design digital dental treatment. The method includes the steps of data model building and preprocessing, tooth feature extraction, preparation body model parametric design and modification and model quality evaluation. Man-machine interaction is easy and convenient to achieve by means of a guide type model generation method, the automation degree is high, a tooth preparation body model meeting the requirements of various medical indexes can be smoothly generated, and individuation, parametric modification and result quality evaluation of the tooth preparation body model can be achieved. By means of the design method, tooth preparation time and treatment cost of dentists are greatly reduced, repair comfort and efficiency are improved, and the method has great application value in the field of computer aided dental preparation.

The invention discloses a ceramic material for false tooth preparation and a preparation method thereof. The ceramic material is composed of straw powder, yttrium oxide, aluminum oxide, zirconia, ceramic powder and a polyvinyl alcohol water solution. The preparation method comprises the following steps: 1. taking the straw powder, yttrium oxide, aluminum oxide, zirconia, ceramic powder and polyvinyl alcohol water solution in parts by weight, adding the yttrium oxide, aluminum oxide, zirconia and ceramic powder into a ball mill, and milling for 2-5 hours to obtain a first mixture; 2. putting the first mixture into a crucible, heating to 1800-2500 DEG C, keeping the temperature for 1-3 hours, adding the straw powder, adding the polyvinyl alcohol water solution, and stirring to obtain a second mixture; and 3. pouring the second mixture into a mold, and carrying out vacuum drying for 1-4 hours. The ceramic material has the advantages of wear resistance, acid / alkali resistance, high hardness and low preparation cost.

The invention relates to a manufacturing method of a functional area tooth preparation guide plate and a detachable drill limiter. The method comprises the following steps that a tooth required to besubjected to tooth preparation and adjacent teeth are scanned; the three-dimensional shape of a tooth preparation body is designed by using three-dimensional reverse engineering software; a guide groove capable of guiding the motion path of a dental drill in the whole process in the key functional area preparation process is designed in the guide plate; the dental crown data surfaces of the adjacent teeth are each thickened to be a thin wall with the thickness of 1-4 mm; the guide plate is machined into an entity through a three-dimensional printer or numerical control machining equipment; thedetachable drill limiter is designed to be matched with a hemispherical groove in the top of the guide plate; and after the guide plate is completely in place on a dentition model, accurate tooth preparation of the corresponding area can be completed according to the designed tooth preparation amount. According to the method, the accuracy and efficiency of tooth preparation of the key functionalareas such as the axial surface, the edge, the guide plane (the tooth preparation guide plate is shown in the description) and a jaw support fossa of a base tooth in the fixed repair and removable repair process can be improved, and popularization and application can be facilitated.

The invention discloses an intelligent robot used for tooth preparation of pulp opening of a tooth. The intelligent robot used for tooth preparation of pulp opening of the tooth comprises a clamping slot, an X axis movement carrier plate, a drill angle fine tuning opening, a Y axis movement rod, a drill angle fine tuning rod, a Z axis movement rod, a control driving mechanism, a washing back suction mechanism and a drill, wherein the control driving mechanism is fixedly arranged on the Z axis movement rod, is respectively connected with an X axis movement carrier plate driving mechanism, a Y axis movement rod driving mechanism, a Z axis movement rod driving mechanism, a drill angle fine tuning rod driving mechanism, the washing back suction mechanism and the drill, and is used for receiving the control information of an external computer and controlling the X axis movement carrier plate, the Y axis movement rod, the Z axis movement rod, the drill angle fine tuning rod, the washing back suction mechanism and the drill to operate. The intelligent robot used for tooth preparation of pulp opening of the tooth has the advantage that the drill is accurately driven to carry out preparation forming and pulp cavity opening on a tooth body of a target tooth based on analysis of digital tooth anatomy structure data.

The invention relates to a biomimetic type preformed ceramic abutment of an implanted tooth and a preformed inner crown thereof, belonging to the field of implant restoration of dentition defect or dentition deletion of an oral cavity and aiming at improving the appearance, shape and color, strengthening retention and reducing microleakage. The technical scheme of the invention is as follows: the implant denture restoration is matched with different preformed ceramic abutments according to different teeth positions, i.e., the upper parts of the implants with implanted alveolar bones are matched with preformed ceramic abutments according to different teeth positions; the preformed ceramic abutment comprises a lower part structure inserted into the implant, a middle part structure imitating the shape of the neck of a natural tooth and an upper part structure imitating the form of tooth preparation of the natural tooth; and the outer surface of the upper part structure of the preformed ceramic abutment is matched with the preformed inner crowns of initial dental crowns of different teeth positions. The invention is applicable to the implant restoration of dentition defect or dentition deletion of the oral cavity, especially the deletion restoration of anterior teeth with higher requirement for beauty.

The invention discloses a special protective device for tooth preparation in dental clinical field. The protective device comprises a first fixed mount, wherein a connecting rack is connected to the end of the first fixed mount by virtue of a rotating mechanism; a second fixed mount is fixed to the top of the connecting rack; the second fixed mount and the first fixed mount are connected by virtue of an angle adjusting device; and a tongue protective stopper is clamped at the inner side of the first fixed mount by virtue of a clamping mechanism. According to the special protective device for tooth preparation in the dental clinical field, a tongue body can be protected by virtue of the tongue protective stopper, so that the safety of an operation is greatly enhanced; the first fixed mount and the second fixed mount can expand by virtue of the angle adjusting device, so that an oral cavity is dilated; therefore, a spatial area is provided for the operation, a large operative field is exposed, the working intensity of medical personnel is greatly reduced and the work of the medical personnel is facilitated; and the first fixed mount and the tongue protective stopper are connected by virtue of the clamping mechanism, so that the tongue protective stopper can be detached and mounted conveniently.

The invention discloses an alveolar abscess cut model, which comprises a simulated alveolar bone, wherein at least one simulated abscess is removably fixed in any position on the simulated alveolar bone corresponding to the gumline, and artificial teeth used for tooth preparation can be fixed in the alveolar fossa on the simulated alveolar bone in a mode by screws and screw nuts. The alveolar abscess cut model can be used for two kinds of practice operations of abscess cut and tooth body preparation, and can meet the diversification requirement of the oral cavity teaching. In addition, the simulated abscess and the artificial teeth used for tooth preparation can be replaced into new abscess and new artificial teeth after the operation without replacing the whole alveolar abscess cut model, the cost is saved, and the invention is favorable for environment protection.

The invention discloses a manufacturing method of a digitalized tooth preparation and implanting combined operation guide plate. The manufacturing method comprises the steps that a preoperative modelincluding oral cavity conditions is obtained, and data is acquired; a target repairing body is determined and wax type data is obtained; after equal-thickness shrinking is conducted on the target repairing body, fine finishing and smoothing treatment are conducted to form a virtual tooth body; the three-dimensional position of an implant in the preoperative model, the data and the wax type data isdetermined; an operation guide ring model is corrected; extending is conducted to obtain an operation guide plate model; printing forming is conducted on the combined operation guide plate model through 3D printing. The invention further discloses the operation guide plate. According to the method, the operation guide plate is designed by using a digitalized design technology and a 3D printing technology, in the modeling process, tooth body preparation operation design, implanting operation design, implanting base station mould obtaining and prepared base tooth mould obtaining are completed simultaneously, clinical operation steps and the treatment frequency are reduced, and the corresponding material cost and time cost are reduced.

A personalized metallic dental pile simulating mechanical properties of natural teeth comprises a pile and a core. The pile and core formed integrally; the metal dental pile comprises a compact part and a loose part; the loose part is located in the contact area of the dental pile and the residual root or residual tooth; and the elasticity modulus of the loose part is lower than that of the compact part. The manufacturing method of the metal dental pile comprises the following steps: conducting conventional repair design and tooth preparation; acquiring digital dental impression of a patient; designing a three dimensional model of the dental pile with according to the structure characteristics of the root canal and the residual tooth of the patient's; conducting adaptation of the pile and the root canal of the residual tooth, and finding out the contact area of the dental pile with the residual root or residual crown; setting the contact area as the loose part; setting the area outside of the contact part as the compact part; forming the dental pile; and trimming the dental pile to make the dental pile seal with the root canal of the patient's. The invention has the advantages of high adaptation, high flexural strength and no damage to the tooth root.

The invention discloses a combined guide plate for removable denture abutment tooth preparation and implant implantation and a manufacturing method thereof, and the manufacturing method comprises the following steps: preparing a dentition and an alveolar ridge model, and then carrying out digital scanning on the dentition, the alveolar ridge model and a dentition mouth to obtain a digital model; matching the digital model with a CBCT three-dimensional reconstruction alveolar bone model shot by a patient to obtain a removable denture base three-dimensional model; carrying out removable denture in-position path analysis and determination on the removable denture base three-dimensional model, and then manufacturing an abutment hole, a removable denture abutment preparation guide rod and an implant implantation guide ring to obtain a combined guide plate three-dimensional model; and generating the three-dimensional model of the combined guide plate through a computer, and carrying out 3D resin printing to obtain the combined guide plate for removable denture abutment tooth preparation and implant implantation. The combined guide plate prepared by the invention has the advantages of reducing abrasion among implant components, smoothly and passively positioning and taking out RPD, slowing down absorption of edge alveolar ridges and ensuring the service life of the implant in the use process.

The invention discloses a dental mixed porcelain laminate veneer and belongs to the technical field of dental medical instruments. The dental mixed porcelain laminate veneer is characterized by comprising a tongue side porcelain laminate veneer and a lip side porcelain laminate veneer which cover a tooth body; the tongue side porcelain laminate veneer completely covers the tongue side of the toothbody; the lip side porcelain laminate veneer partially covers the lip side of the tooth body; a boundary line for butt joint and combination is formed between the tongue side porcelain laminate veneer and the lip side porcelain laminate veneer; the boundary line is positioned at the rear cutting end of the tongue side porcelain laminate veneer and avoids for 2mm from an occlusion contact area toform a shoulder of a round right angle or is positioned at 1 / 2 of the tooth body in an incisal edge lip and tongue direction; the tongue side porcelain laminate veneer is made of zirconium oxide or glass ceramic; and the lip side porcelain laminate veneer is made of feldspathic ceramic. The dental mixed porcelain laminate veneer disclosed by the invention has both mechanical and aesthetical properties, is applicable to occlusion reconstruction for a tooth with an occlusion space on the lip side and normal tongue colors and fixing and repairing of a tooth with the occlusion space on the lip side, and is good in practicability, in addition, more tooth body tissue can be maintained, tooth preparation on the tongue side is not needed, and the tooth preparation amount on the lip side is smallerthan 0.5mm or is not needed.

The invention discloses a skeleton porcelain tooth veneer from tooth preparation and a preparation method of the skeleton porcelain tooth veneer. The method includes the steps of impression; scanning;designing; numerical-control equipment processing to cut out a wax shape of dentin form; embedding to form a hollow model of the dentin form; casting, namely putting porcelain into the hollow model for casting so that a skeleton porcelain with the dentin form is formed after casting; applying of veneering porcelain, namely mixing porcelain powder with special liquid in paste and coating the sameto the skeleton porcelain to form a veneer shape to ensure that the thickness is consistent with designed thickness, and performing sintering and drying; grinding, namely performing dyeing and glazingto obtain the finished product. The tooth veneer is made of the skeleton porcelain and the veneer porcelain by splicing processing, so that the thickness is further reduced, and the thinnest part canreach the thickness of 0.2mm; the thickness of the veneer is reduced, the removal of teeth is small, and tooth damage is reduced; the skeleton porcelain is made of cast porcelain, the veneer porcelain is made of porcelain, and high strength of the cast porcelain and color and simulation of the porcelain are combined; adopting the dentin form, the skeleton porcelain is not easy to crack or break and has strong stability.

The invention discloses a production method of a gingiva forming and alveolar bone trimming surgery guiding device. The production method of the gingiva forming and alveolar bone trimming surgery guiding device comprises the following steps: building a digital patient model; cutting redundant gingiva in the digital patient model, and forming a formed gingiva contour; building a tooth-supporting retention device model; forming a gingiva forming guiding cambered surface; building an alveolar bone repair guiding cambered surface, and cutting a root side portion along the alveolar bone repair guiding cambered surface; and generating the guiding device. The gingiva forming and alveolar bone trimming surgery guiding device is further disclosed. According to the production method of the gingiva forming and alveolar bone trimming surgery guiding device and the guiding device, the surgery guiding device which conducts gingiva engraving forming in a computer, and then conducts modelling and 3D printing is provided, gingiva forming surgery and alveolar bone trimming surgery are guided through the device, and by combining digital design and 3D printing, a novel tooth preparation surgery guideplate is produced, so that a clinical tooth preparation surgery process is guided.

The invention provides a tooth preparation system. The tooth preparation system comprises a visual marking guide plate, a dental robot, a visual navigator and a preparation control device, wherein the visual marking guide plate is arranged on a dentition where a tooth to be repaired is located, and the visual marking guide plate is provided with a dentition visual mark; the dental robot comprises a mechanical positioning arm and a surgical instrument arranged at the tail end of the mechanical positioning arm, and an instrument visual mark is arranged on the surgical instrument; the visual navigator is used for detecting the position postures of the dentition visual mark and the instrument visual mark; and the preparation control device performs visual calibration based on the position posture of the dentition visual mark, performs hand-eye calibration based on the position posture of the instrument visual mark, and controls the mechanical positioning arm to act based on a visual calibration result and a hand-eye calibration result. According to the system provided by the invention, even in a narrow and non-direct-view environment in the oral cavity, the dental robot can be automatically controlled to move, so that the tooth preparation precision is higher, and meanwhile, the operation efficiency and the consistency are improved.

The invention relates to an all-ceramic tooth preparation method based on a facial and oral dentition three-dimensional scanning technology. The method comprises the following steps: carrying out spatial three-dimensional registration on facial three-dimensional data and dentition three-dimensional data of a patient through a plurality of feature points on the surfaces of teeth and gingiva of thepatient; designing a lip surface three-dimensional form of the upper anterior teeth and / or the lower anterior teeth to enable the tooth protrusion and the incisor curve to accord with the upper lip shape and the lower lip shape of the patient; copying the three-dimensional shapes of the tongue surface of the original upper anterior tooth and the incisor end of the lower anterior tooth of the patient, and adjusting the three-dimensional shapes so that the forward extension and lateral movement tracks of the lower anterior tooth of the patient accord with the leading characteristics of the patient before repair to obtain a lingual three-dimensional shape; performing data fusion on the lip surface three-dimensional form and the lingual side three-dimensional form to form a three-dimensional digital model with an expected repair effect; and performing three-dimensional printing based on the three-dimensional digital model with the expected repair effect to obtain a resin model, and preparing the all-ceramic tooth according to the obtained resin model. Real three-dimensional aesthetic design can be carried out for the patient.

The invention relates to the technical field of medical science, in particular to a method and a device for simulating a tooth preparation surgery in the dental department. The method and the device for simulating a tooth preparation surgery in the dental department are applied to electronic equipment which is connected with a force feedback instrument. The method for simulating a tooth preparation surgery in the dental department includes the following steps: making a surgical instrument model move in response to a moving operation of a user on the force feedback instrument; detecting whether a tooth model collides with the surgical instrument model; and if the tooth model collides with the surgical instrument model, cutting the collision part of the tooth model in response to an operation of the user, calculating a force generated by collision according to preset parameters, and sending the force generated by collision to the force feedback instrument so the force feedback instrument can restore the force generated by collision and let the force be sensed by the user in real time. Through the scheme, surgery simulation training is provided for dentists, the actual operation skill is improved, and the cost of dentist training at ordinary times is saved.

The invention discloses a special protection device for oral clinical tooth preparation, and relates to the technical field of medical instruments. According to the invention, two sliding seats are arranged on a cross rod in a sliding manner; a plurality of pulleys are mounted on the inner bottom surface of the sliding seat side by side; a fixing bolt is arranged on one side of the sliding seat; afirst shaft seat is fixed on the other side surface of the sliding seat; a lower jaw clamping plate is hinged to the first shaft seat; a screw rod is movably mounted on the upper surface of a mounting base; a supporting plate is mounted on the screw rod; the screw rod drives the supporting plate to move up and down; a second shaft seat is fixed on one side surface of the supporting plate; and anupper jaw clamping plate is hinged to the second shaft seat. Through the sliding fit of the sliding seats and the cross rod, the distance between the upper jaw clamping plate and the lower jaw clamping plate is adjusted according to the oral cavity size of a patient, the use of different patients is facilitated, and the use range is expanded; and the upper jaw and the lower jaw are supported through screw rod structure matching, the structural strength is high, moving is not likely to happen, and doctors can conveniently adjust according to needs.

A peeling type laser tooth preparing method, apparatus and device, and a medium. Method comprises: acquiring a first STL model of a target tooth and a second STL model of a tooth preparation of the target tooth; generating a conical peeling curved-surface STL model, in a manner of taking a three-dimensional curve of a peripheral edge contour of a shoulder in the second STL model as a bottom edge; carrying out Boolean calculation on the peeling curved-surface STL model and the first STL model to obtain a third STL model; carrying out Boolean calculation on the second STL model and the third STL model to obtain a fourth STL model required to be removed; generating a multilayer laser cutting path according to the fourth STL model, controlling a laser tooth preparing device to perform the tooth preparing process of the target tooth according to the multilayer laser cutting path.

The invention discloses a method for transferring occlusion relationship and form design in dental occlusion reconstruction and restoration, belonging to the technical field of dental occlusion reconstruction and restoration. The method is characterized by comprising the following steps of: a, digitally scanning a model; b, designing a virtual aesthetic diagnosis wax pattern; c, performing 3D printing on the aesthetic diagnosis wax pattern; d, conducting tooth preparation and carrying out digital scanning for formulation of models; e, performing model fitting; and f, completing the design andmanufacturing of a temporary restoration body. According to the invention, data fitting is carried out twice, a working model completing tooth preparation is overlapped and fitted with the virtual aesthetic diagnosis wax pattern, and the jaw position relationship determined by an occlusal pad type restoration body is transferred to the temporary restoration body, so a tissue surface can be tightlyattached to butments after intraoral preparation, repeated relining, adjustment and modification of the temporary restoration body are not needed, and restoration efficiency and restoration precisionare greatly improved.

The invention relates to an efficient method for manufacturing tooth preparation guide plates. The method comprises the following steps that a tooth required to be subjected to tooth preparation and adjacent teeth are scanned; the three-dimensional shape of a tooth preparation body is designed by using three-dimensional reverse engineering software; the two sets of guide plates in the preparationprocess of the buccal and labial surface, the lingual and palatine surface and the occlusal surface of the tooth are designed by using the three-dimensional reverse engineering software; the dental crown data surfaces of the adjacent teeth are each thickened to be a thin wall with the thickness of 1-4 mm; the guide plates are machined into an entity through a three-dimensional printer or numericalcontrol machining equipment; a detachable drill limiter is designed and is matched with hemispherical grooves in the tops of the guide plates; firstly, the first set of guide plate is completely in place on a dentition model; then the second set of guide plate is replaced, and the tooth preparation of the rest part can be guided; and finally, the guide plates are removed, and areas which are notcovered by the two sets of guide plates are finely trimmed to be smooth and continuous. According to the method, the efficiency of tooth preparation of the key functional areas such as the axial surface, the edge, the guide plane (the tooth preparation guide plate is shown in the description) and a jaw support fossa of a base tooth in the fixed repair and removable repair process can be improved,and the precision of tooth preparation guided by the guide plates can be improved.