A method for manufacturing a 3D printing resin filling guide plate

Abstract

This invention relates to the field of dental restoration technology and discloses a method for fabricating a 3D-printed resin filling guide. In clinical practice, the affected tooth is prepared and color matched. Three-dimensional data of the patient's upper and lower jaw dentition and the prepared abutment tooth data are obtained through digital oral scanning, along with the occlusal relationship. The abutment tooth data includes the abutment tooth size, axial direction, and gingival margin morphology. The 3D-printed resin filling guide fabrication method provided by this invention, utilizing digital design and 3D printing technology, creates a resin filling guide that meets the patient's personalized needs. This fundamentally overcomes many drawbacks of existing dental resin restoration techniques, achieving precision, personalization, and minimally invasive dental resin restoration, while improving clinical operational efficiency and patient satisfaction with aesthetic treatment.

Description

Technical Field

[0001] This invention relates to the field of dental restoration technology, specifically a method for manufacturing a 3D printed resin filling guide. Background Technology

[0002] Tooth defects are common dental diseases in clinical dentistry. Resin restorations have become the mainstream method for tooth defect repair due to their advantages such as ease of operation, good adhesion to tooth tissue, and excellent aesthetic results. Currently, there are three main technical approaches for resin restorations of tooth defects in clinical practice, all of which have significant technical shortcomings and cannot meet the precise and personalized aesthetic restoration needs of clinicians. These are detailed below: The dentist directly uses light-cured resin to manually mold the tooth. This method relies entirely on the dentist's clinical experience, and the restoration process is highly random. It is impossible to design the tooth shape according to the patient's individual needs, making it difficult to meet the patient's personalized aesthetic requirements for tooth restoration. The aesthetic indicators such as the shape, proportion, and symmetry of the restored tooth are poorly controllable.

[0003] After preparing the tooth, the dentist performs an optical scan and then fabricates a temporary resin crown using computer-aided cutting. While this method achieves some digital design, it is limited by the type of resin used, offering only two fixed shades: A2 and A3. This extremely limited range of shades makes it unsuitable for patients with special dental conditions, such as those with fluorosis or tetracycline staining who require darker resins for restoration. This method fails to meet the color restoration needs of these patients, resulting in low aesthetic satisfaction.

[0004] Researchers have attempted to perform oral scans on abutment teeth, reconstruct the tooth shape using computer-aided design, and 3D print a resin model of the dental arch. A silicone rubber guide was then manually fabricated based on the resin model, and the restoration was completed by injecting resin through this guide. However, the core component of this method, the silicone rubber guide, is hand-fabricated, resulting in extremely low manufacturing precision. This makes it impossible to precisely fit the abutment teeth, easily leading to resin filling deviations. Furthermore, the hand-fabricated silicone rubber guide is often too large, causing a strong foreign body sensation when inserted into the patient's mouth. This not only affects the convenience of clinical procedures but also causes significant discomfort to the patient. Moreover, the guide design does not consider resin overflow and placement verification, leading to uneven resin filling and excessive overflow during clinical procedures, further reducing the accuracy of the restoration.

[0005] Existing dental resin restoration techniques suffer from problems such as low restoration precision, poor aesthetic predictability, and insufficient personalization. Some solutions also have drawbacks such as poor ease of operation and unsatisfactory patient experience. There is an urgent need for a dental resin restoration technique that can achieve high precision, personalization, and minimal invasiveness to address the pain points of existing techniques. Summary of the Invention

[0006] The purpose of this invention is to provide a method for manufacturing a 3D printed resin-filled guide plate to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: A technical solution for manufacturing a 3D printed resin-filled guide plate includes the following steps: S1. In clinical diagnosis and treatment, tooth preparation and color matching are performed on the affected tooth. Three-dimensional data of the patient's upper and lower jaw dentition and data of the prepared abutment teeth are obtained through digital oral scanning. At the same time, the occlusal relationship is obtained. The abutment tooth data includes the size, axis, and gingival margin morphology of the abutment teeth. S2. Import the digital data obtained in step S1 into the design software, and use computer design methods to design a virtual crown on the abutment tooth. Adjust the data parameters to obtain a matching virtual crown. The design parameters of the virtual crown include the placement direction, cervical margin design, crown thickness, and crown outer dimensions. S3. Based on the virtual crown obtained in step S2, design a resin filling guide plate in the design software. The design parameters of the resin filling guide plate include the guide plate positioning direction, guide plate range, guide plate thickness, guide plate overflow space, overflow hole size, and positioning observation window. S4. Import the resin filling guide plate data from step S3 into a 3D printing device for printing. After cutting the connecting handle and polishing, the resin filling guide plate physical object is obtained. S5. In clinical diagnosis and treatment, the resin filling guide plate is placed into the affected tooth in the patient's mouth. After modifying the resin overflow hole, resin is filled into the guide plate. Excess resin overflows from the overflow hole. The resin in the transparent guide plate is then light-cured and shaped. S6. Remove the resin filling guide plate to obtain a personalized resin crown, which is then adjusted and polished to complete the tooth resin restoration.

[0008] As a preferred technical solution, in step S2, the virtual crown is a personalized shape design, and the design parameters of the virtual crown are adjusted according to the patient's aesthetic needs to adapt to the dental aesthetic restoration needs of different patients.

[0009] As a preferred technical solution, in step S3, the resin filling guide is a personalized design and customization. The design parameters of the resin filling guide, such as the tooth position range and placement direction, are adjusted according to the number and arrangement of the abutment teeth to suit the aesthetic restoration needs of different patients.

[0010] As a preferred technical solution, in step S3, the resin filling guide is a personalized design and customization. The design parameters of the resin filling guide, such as the tooth position range and placement direction, are adjusted according to the number and arrangement of the abutment teeth to suit the aesthetic restoration needs of different patients.

[0011] As a preferred technical solution, in step S1, the digital oral scan uses a 3ShapeTrios optical scanner, and in steps S2 and S3, the design software is 3Shape design software.

[0012] As a preferred technical solution, in step S4, the 3D printing equipment uses a 3D model printer from Han's Laser Technology Co., Ltd., and the printing material is GV-Model guide plate model resin; before printing, the step also includes printing a full row of yellow resin dummy using the three-dimensional data, wherein the resin dummy is obtained by printing DM12-V2 dummy resin powder using a 3D model printer.

[0013] As a preferred technical solution, in step S3, the thickness of the resin filling guide plate is set to 0.7 mm, and the resin injection gap between the guide plate and the abutment tooth is set to 0.8 mm; the overflow hole is located at the central incisor position, and the positioning observation window is located at the adjacent lateral incisor position.

[0014] As a preferred technical solution, step S5, before filling with resin, also includes a preparatory step for bonding the abutment tooth: the abutment tooth is isolated by cotton rolls, acid etching agent is applied to the labial, palatal, and mesial-distal surfaces of the abutment tooth for 10-15 seconds, rinsed with water and dried with an air gun; adhesive is evenly applied to the surface of the abutment tooth, left to stand for 20 seconds and then dried, left to stand for another 20 seconds, and then cured by irradiating each direction of the abutment tooth with a light curing lamp for 10 seconds.

[0015] As a preferred technical solution, in step S5, the filling resin is a paste resin or an injection resin; when filling the paste resin, a metal filling instrument is used to select and compact it in small amounts multiple times to avoid voids and air bubbles; the injection resin is squeezed and injected into the guide plate, and the distance from the resin edge to the resin filling guide plate is 0.2-0.5mm.

[0016] As a preferred technical solution, in step S5, after the resin-filled guide plate is pressed into place by the abutment tooth, the precise placement of the guide plate is checked through the placement observation window, and the height of the guide plate is ensured to be parallel to the adjacent tooth. After removing excess resin from the edge of the guide plate and the overflow hole, the resin is cured by light curing lamp along all directions of the resin-filled guide plate. The light intensity of the light curing lamp is 2000mW / cm², and a rapid curing mode of 3 seconds is adopted.

[0017] As a preferred technical solution, in step S6, the resin filling guide is gently removed by using a dental polishing bur. The resin that has not been fully cured is then fully cured by using a light curing lamp from all directions before being adjusted and polished.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows: The 3D printing resin filling guide fabrication method provided by the present invention, with the help of digital design and 3D printing technology, creates a resin filling guide that meets the individual needs of patients, fundamentally overcoming many drawbacks of existing dental resin restoration technology, achieving precision, personalization and minimal invasiveness of dental resin restoration, while improving clinical operation efficiency and patient satisfaction with aesthetic treatment.

[0019] This invention utilizes precise three-dimensional data of the dentition obtained through digital oral scanning, and uses this data for computer-aided design of virtual crowns and resin filling guides. The guides, after 3D printing, achieve precise fit with the abutment teeth. Compared to traditional hand-fabricated silicone rubber guides, this significantly improves accuracy. During the restoration process, the overflow holes and placement observation windows on the guides allow for precise control over the resin filling and guide placement, avoiding the randomness of manual molding and the design limitations of cut crowns. This enables the aesthetic indicators of the tooth restoration, such as shape, proportion, and symmetry, to be designed and precisely achieved in advance, greatly enhancing the aesthetic predictability of aesthetic resin fillings.

[0020] On the one hand, virtual crowns can adjust parameters such as placement direction and crown dimensions according to the patient's personalized aesthetic needs, creating a customized tooth shape suitable for the patient. On the other hand, the resin filling guide is designed to complement the virtual crown and can adapt to resins with different mechanical properties, colors, saturation, and other parameters. This breaks through the limitation of traditional cut resin temporary crowns, which only have two colors, and can meet the color restoration needs of special patients such as those with fluorosis and tetracycline staining. Furthermore, resins with different hardness and shrinkage rates can be selected according to the patient's tooth condition, achieving personalized customization of resin materials and comprehensively meeting the patient's restorative needs.

[0021] Featuring a transparent, integrated design, with parameters such as thickness and overflow space optimized by computer, this compact device offers excellent fit to the abutment teeth. Once inserted into the patient's mouth, it causes minimal foreign body sensation, enhancing the convenience of clinical procedures. The guide plate is designed with overflow holes and a positioning observation window, enabling rapid inspection of guide plate placement and effectively guiding resin overflow, avoiding excessive resin spillage and reducing the time spent removing excess resin. The light curing process utilizes a high light intensity of 2000mW / cm² and a 3-second rapid curing mode, significantly shortening resin curing time and simplifying overall clinical procedures, thereby improving the efficiency of dental restoration procedures.

[0022] The digital design of this invention can precisely control the range and thickness of resin filling. The resin injection gap of the guide plate is set to 0.8mm. Under the premise of meeting the restoration strength, it can minimize the amount of resin used and tooth preparation, avoid excessive preparation of tooth tissue, realize minimally invasive restoration of tooth defects, and better protect the tooth tissue and pulp vitality of the affected tooth.

[0023] During resin filling, a guide plate ensures precise filling, preventing voids and air bubbles from forming within the resin. Simultaneously, standardized parameters are used in the acid etching and adhesive curing steps before bonding the abutment teeth, improving the bond strength between the resin and the abutment teeth. The resin curing process involves ample light exposure from multiple directions to ensure optimal curing. The resulting resin crown adheres tightly to the tooth structure, exhibiting a dense structure and significantly enhancing the stability and lifespan of the restoration.

[0024] The manufacturing method of this invention is applicable to the restoration of single or multiple tooth defects. Moreover, the guide plate design allows for adjustment of the position of the overflow hole and the placement observation window according to different tooth positions (such as central incisors, lateral incisors, etc.), and different brands and types of resin can be selected for filling. It has strong flexibility and adaptability in clinical application and can be widely used in the resin aesthetic restoration of various tooth defects in oral clinical practice. Attached Figure Description

[0025] Figure 1 A design drawing of a digital resin filling guide plate for a method of fabricating a 3D printed resin filling guide plate; Figure 2 A photograph of a 3D-printed resin-filled guide plate that has been completed. Figure 3 An intraoral photograph of a patient illustrating a method for fabricating a 3D-printed resin-filled guide plate; Figure 4 Two central incisors, atomized tooth virtual model segmentation diagram, used as part of a method for fabricating a 3D printed resin filling guide plate; Figure 5 An orientation diagram of the crown for a method of fabricating a 3D printed resin-filled guide plate; Figure 6 A neckline diagram of a crown used to confirm a method for fabricating a 3D printed resin-filled guide plate. Figure 7 Internal parameters of the crown are shown in a method for fabricating a 3D printed resin-filled guide plate. Figure 8 Design of a crown outline for a method of fabricating a 3D printed resin-filled guide plate; Figure 9 A schematic diagram of a guide plate model for a method of fabricating a 3D printed resin-filled guide plate; Figure 10 A guide plate placement orientation diagram for a method of fabricating a 3D printed resin-filled guide plate; Figure 11 A diagram showing the range of a 3D-printed resin-filled guide plate. Figure 12 A diagram showing the generated guide plate according to a method for fabricating a 3D printed resin-filled guide plate; Figure 13 Bottom view of the generated guide plate in a method for fabricating a 3D printed resin-filled guide plate; Figure 14 A physical image of a guide plate used in a method for fabricating a 3D printed resin-filled guide plate; Figure 15 Injection resin diagram for a method of fabricating a 3D printed resin-filled guide plate; Figure 16 An assembly drawing of a guide plate for a method of fabricating a 3D printed resin-filled guide plate; Figure 17 A resin overflow diagram illustrating a method for fabricating a 3D printed resin-filled guide plate. Figure 18 A diagram illustrating the cleaning of resin overflow in a method for fabricating a 3D printed resin-filled guide plate. Figure 19 Photocuring diagram of a method for fabricating a 3D printed resin-filled guide plate; Figure 20 A finished resin-filled restoration based on a method for fabricating a 3D-printed resin-filled guide plate. Detailed Implementation

[0026] The features and exemplary embodiments of various aspects of the present invention will now be described in detail. To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. For those skilled in the art, the present invention can be practiced without some of these specific details. The following description of the embodiments is merely to provide a better understanding of the present invention by illustrating examples of the invention.

[0027] like Figures 1-20 As shown, the present invention provides a technical solution for manufacturing a 3D printed resin-filled guide plate, comprising the following steps: S1, Tooth preparation and digital scanning In clinical practice, the dentist performs standardized tooth preparation on the patient's two missing central incisors, removing decay and reshaping the tooth shape. Then, the tooth color is compared to determine the base color of the restorative resin. The 3Shape Trios optical scanner (Denmark) is used to perform digital oral scanning on the patient's upper and lower dentition, accurately acquiring three-dimensional data of the patient's upper and lower dentition, data of the prepared abutment teeth (size, axis, gingival margin morphology), and simultaneously scanning to obtain the patient's occlusal relationship. The scan data is transmitted to the computer terminal in real time.

[0028] The clinical pretreatment of the affected tooth provides accurate and complete three-dimensional data of the dentition for subsequent digital design; the color matching step provides a reference for the subsequent resin selection, ensuring that the color of the restored tooth is coordinated with the natural dentition.

[0029] Digital scanning can achieve micron-level precision. Compared with traditional optical molds, data acquisition is more accurate and faster, and there is no deformation error of the mold material, which lays the data foundation for the precise design of the virtual crown and guide plate.

[0030] Preliminary steps, printing yellow resin models of the entire dentition The 3D data of the dental arch obtained by S1 was imported into the 3D model printer of Han's Laser Technology Co., Ltd., and the DM12-V2 generation resin powder of Hangzhou Xianlin Technology Co., Ltd. was used to print a yellow resin model of the entire dental arch that matches the patient's dental arch 1:1.

[0031] It provides a physical model for the trial fitting, adjustment, and clinical operation simulation of resin filling guides, avoiding the operational risks and patient discomfort caused by directly adjusting the guides inside the patient's mouth.

[0032] The shape and size of the resin mandrel are completely consistent with the patient's actual dentition. The mandrel can be used to perform the initial trial fitting of the guide plate and the simulation of resin filling, thus optimizing the clinical operation process.

[0033] S2, Computer-designed personalized virtual crown The digital data acquired by S1 is imported into 3Shape design software (Denmark). The prepared abutment teeth are located in the software, and a virtual crown is designed on the abutment teeth using computer-aided design methods. According to the patient's personalized aesthetic needs, parameters such as the placement direction, cervical margin design, crown thickness, and crown dimensions of the virtual crown are adjusted to ensure that the shape and proportion of the virtual crown are coordinated with the patient's natural dentition and facial features, ultimately obtaining a personalized virtual crown that matches the patient's needs.

[0034] Customized tooth shape is created based on the patient's individual needs, and the final tooth shape after resin restoration is determined, providing a precise shape reference for the design of resin filling guide plate.

[0035] The personalized design of virtual crowns can meet the aesthetic needs of different patients, breaking the fixed shape limitations of traditional restoration methods and realizing personalized customization of tooth restoration; the design software can adjust parameters in real time and intuitively display the aesthetic effect after restoration, which facilitates communication and confirmation between doctors and patients.

[0036] S3, Matching Resin Filling Guide Plate In the 3Shape design software, using the personalized virtual crown obtained from S2 as a reference, a resin filling guide was designed accordingly. The specific design parameters are as follows: the guide's placement direction is consistent with the virtual crown to ensure precise fit between the guide and the abutment tooth; the guide's range covers two missing central incisors and adjacent lateral incisors; the guide thickness is set to 0.7mm to ensure structural strength and avoid excessive volume; the guide's overflow space matches the resin injection gap and is set to 0.8mm; resin overflow holes are designed at the positions of the two central incisors, and placement observation windows are designed at the positions of the adjacent lateral incisors; at the same time, the guide design reserves space to accommodate resins with different parameters, including mechanical properties, shrinkage rate, hardness, water absorption rate, particle size, color, and saturation.

[0037] We create resin filling molds that precisely match the virtual crown and abutment teeth. Through overflow holes and positioning observation windows, we achieve precise control over resin filling and guide plate positioning. At the same time, we are compatible with different types of resins, enabling personalized selection of resin materials.

[0038] The guide plate's parameters are optimized by computer, ensuring a high degree of fit with the abutment tooth and virtual crown. It can precisely guide resin filling during the restoration process, avoiding filling deviation. The reasonable layout of the overflow hole and the positioning observation window can quickly check the guide plate's positioning and effectively guide resin overflow, improving clinical operation efficiency. The guide plate is compatible with a variety of resins, breaking the traditional limitations of resin selection in restoration.

[0039] S4, 3D printing to create a resin-filled guide plate (actual object). The data of the resin filling guide plate designed by S3 was imported into the 3D model printer of Han's Laser Technology Co., Ltd., and the GV-Model guide plate model resin of Shenzhen Times Pioneer Technology Co., Ltd. was used for printing. After printing, the connecting handle at the bottom of the guide plate was cut off with dental cutting instruments, and then the surface of the guide plate was finely polished with dental polishing instruments to obtain a transparent resin filling guide plate.

[0040] The digital guide plate design is transformed into a physical guide plate, providing a precise mold carrier for clinical resin filling.

[0041] 3D printing technology can accurately reproduce the computer-designed guide plate structure with high printing precision, and the shape and size of the guide plate are completely consistent with the design data. The GV-Model guide plate model resin is a transparent hard resin with good structural strength and light transmittance, which not only ensures the stability of the guide plate during clinical operation, but also facilitates the light penetration of the curing lamp to achieve full curing of the resin. The polished guide plate has a smooth surface and has little foreign body sensation after being inserted into the patient's mouth.

[0042] S5. Clinical intraoral procedures: Preparation before guide plate trial placement and abutment tooth bonding The polished resin-filled guide plate is placed into the affected tooth in the patient's mouth for trial fitting and fine adjustments to ensure smooth placement and tight fit with the abutment tooth. Then, the abutment tooth is prepared: ① Use cotton rolls for moisture isolation to isolate the affected tooth from saliva and ensure the bonding surface is dry; ② Acid etching treatment: Apply an etching agent evenly to the labial, palatal, and mesial-distal surfaces of the abutment tooth, etching for 10-15 seconds. Rinse thoroughly with water and dry with an air gun. At this point, the tooth surface shows a chalky white acid etching change, increasing the roughness of the tooth surface; ③ Cure the adhesive: Apply dental adhesive evenly to the surface of the abutment tooth, let it stand for 20 seconds to allow the adhesive to fully wet the tooth surface, dry it, and let it stand for another 20 seconds. Then, use a light-curing lamp to illuminate the labial, palatal, and mesial-distal surfaces of the abutment tooth for 10 seconds each to complete the curing of the adhesive.

[0043] To ensure a precise fit between the guide plate and the abutment tooth, the bonding strength between the abutment tooth and the resin is improved through acid etching and adhesive curing steps, providing a good bonding foundation for resin filling.

[0044] After trial fitting and fine-tuning, the guide plate can achieve precise fit with the abutment tooth, avoiding resin leakage and filling deviation during the filling process; acid etching for 10-15 seconds can ensure the roughness of the tooth surface while avoiding excessive acid etching that could damage the tooth tissue; the standardized curing steps of the adhesive ensure that the adhesive and tooth tissue are fully bonded, greatly improving the subsequent bonding strength between the resin and the abutment tooth and preventing the restoration from falling off.

[0045] S6. Clinical intraoral procedures: Resin packing and light-curing shaping Based on the patient's colorimetric results and individual needs, paste resin was selected as the filling material. Using metal filling instruments, small amounts of paste resin were selected multiple times and filled into the resin filling guide, then fully compacted to avoid voids and air bubbles within the resin. If injectable resin was chosen, it was injected into the guide, controlling the distance between the resin edge and the guide to 0.2-0.5 mm to prevent excessive resin overflow. The filled guide was aligned with the abutment tooth and pressed firmly until fully in place. At this point, resin overflowed from the guide's drainage holes and the labial and palatal edges. The precise placement of the guide was checked through the observation window at the lateral incisor position, ensuring the guide height was parallel to the adjacent tooth. After removing excess resin with cotton rolls and a probe, a light-curing lamp was used to cure the resin along all directions of the transparent guide. The light intensity of the light-curing lamp was set to 2000 mW / cm², using a rapid curing mode of 3 seconds, and the resin was sequentially irradiated in all directions.

[0046] Precise resin filling is achieved through a guide plate, avoiding internal defects in the resin. The resin is initially cured using standardized light curing parameters, shaping a tooth shape that matches the virtual crown.

[0047] The use of small, multiple applications of resin, followed by thorough compaction, effectively prevents voids and air bubbles within the resin, ensuring the structural density of the restoration. Controlling the amount of injectable resin used reduces the time required to remove excess resin, improving clinical efficiency. The placement observation window allows for quick and direct inspection of the guide plate's placement, preventing deviations in the restoration's shape due to guide plate misalignment. High light intensity of 2000mW / cm² and a 3-second rapid curing mode significantly shorten the curing time while ensuring sufficient resin curing, and the transparent guide plate does not obstruct light transmission, achieving uniform initial curing of the resin.

[0048] S7. Remove guide plate and finish resin crown. After the resin has initially cured, the transparent resin filling guide is gently removed by polishing with a dental polishing bur. At this point, the resin adheres tightly to the surface of the abutment tooth, forming a resin crown prototype that matches the shape of the virtual crown. The resin that has not yet fully cured is then fully irradiated and cured again from the labial, palatal, mesial and distal directions using a light curing lamp. Finally, the resin crown is finely ground using dental grinding instruments to refine the shape of the tooth and adjust the occlusal relationship. Then, multi-stage polishing is performed using dental polishing instruments to make the surface of the resin crown smooth and consistent with the gloss of the natural dentition.

[0049] Remove the guide plate carrier to complete the full curing of the resin. Optimize the shape and surface precision of the resin crown through grinding and polishing to ensure the occlusal function and aesthetic effect after repair.

[0050] The guide plate is gently removed using a dental polishing bur to avoid damaging the resin crown and abutment tooth tissue. The incompletely cured resin is then thoroughly irradiated to ensure the degree of curing and improve the hardness and wear resistance of the restoration. Fine grinding ensures that the occlusal relationship of the resin crown is normal and avoids chewing discomfort caused by high occlusal points. The smooth surface of the resin crown after multi-stage polishing not only improves the aesthetic effect but also reduces food residue adhesion, making it easier for patients to clean and extending the life of the restoration.

[0051] After this embodiment was completed, the patient's two missing central incisors were precisely repaired. The shape, color, and proportion of the resin crown were highly coordinated with the natural dentition, the occlusion was normal, and the patient had a high satisfaction with the aesthetic treatment. After a 3-month follow-up, the resin crown did not fall off or crack, and it fit tightly with the abutment teeth, and the restoration effect was stable.

[0052] In addition to the above embodiments, the present invention can also be adapted to different restoration scenarios such as single tooth defects and multiple lateral incisor / canine tooth defects. Only the range of the guide plate, the position of the overflow hole and the placement observation window need to be adjusted according to the position of the defective tooth during the design stage of the virtual crown and resin filling guide plate. At the same time, different brands and types of resin can be selected according to the patient's tooth condition. All technical solutions formed by equivalent substitution or equivalent transformation fall within the protection scope of the present invention.

[0053] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A method for manufacturing a 3D printed resin-filled guide plate, characterized in that, Includes the following steps: S1. In clinical diagnosis and treatment, tooth preparation and color matching are performed on the affected tooth. Three-dimensional data of the patient's upper and lower jaw dentition and data of the prepared abutment teeth are obtained through digital oral scanning. At the same time, the occlusal relationship is obtained. The abutment tooth data includes the size, axis, and gingival margin morphology of the abutment teeth. S2. Import the digital data obtained in step S1 into the design software, and use computer design methods to design a virtual crown on the abutment tooth. Adjust the data parameters to obtain a matching virtual crown. The design parameters of the virtual crown include the placement direction, cervical margin design, crown thickness, and crown outer dimensions. S3. Based on the virtual crown obtained in step S2, design a resin filling guide plate in the design software. The design parameters of the resin filling guide plate include the guide plate positioning direction, guide plate range, guide plate thickness, guide plate overflow space, overflow hole size, and positioning observation window. S4. Import the resin filling guide plate data from step S3 into a 3D printing device for printing. After cutting the connecting handle and polishing, the resin filling guide plate physical object is obtained. S5. In clinical diagnosis and treatment, the resin filling guide plate is placed into the affected tooth in the patient's mouth. After modifying the resin overflow hole, resin is filled into the guide plate. Excess resin overflows from the overflow hole. The resin in the transparent guide plate is then light-cured and shaped. S6. Remove the resin filling guide plate to obtain a personalized resin crown, which is then adjusted and polished to complete the tooth resin restoration.

2. The method for manufacturing a 3D printed resin-filled guide plate according to claim 1, characterized in that: In step S2, the virtual crown is a personalized design. The design parameters of the virtual crown are adjusted according to the patient's aesthetic needs to adapt to the dental aesthetic restoration needs of different patients.

3. The method for manufacturing a 3D printed resin-filled guide plate according to claim 2, characterized in that: In step S3, the resin filling guide plate is a personalized design and customization. Based on the number and arrangement of the abutment teeth, the design parameters such as the tooth position range and placement direction of the resin filling guide are adjusted to suit the aesthetic restoration needs of different patients.

4. The method for manufacturing a 3D printed resin-filled guide plate according to claim 3, characterized in that: In step S1, the digital oral scan uses a 3Shape Trios optical scanner; in steps S2 and S3, the design software is 3Shape design software.

5. The method for manufacturing a 3D printed resin-filled guide plate according to claim 4, characterized in that: In step S4, the 3D printing equipment uses a 3D model printer from Han's Laser Technology Co., Ltd., and the printing material is GV-Model guide plate model resin. Before printing, the step also includes printing a full row of yellow resin dummy using the three-dimensional data. The resin dummy is obtained by printing DM12-V2 dummy resin powder using a 3D model printer.

6. The method for manufacturing a 3D printed resin-filled guide plate according to claim 5, characterized in that: In step S3, the thickness of the resin filling guide plate is set to 0.7 mm, and the resin injection gap between the guide plate and the abutment tooth is set to 0.8 mm; the overflow hole is located at the central incisor position, and the positioning observation window is located at the adjacent lateral incisor position.

7. The method for manufacturing a 3D printed resin-filled guide plate according to claim 6, characterized in that: In step S5, before filling with resin, there is also a preparation step before bonding the abutment tooth: the abutment tooth is isolated by cotton rolls, acid etching agent is applied to the labial, palatal, and mesial and distal surfaces of the abutment tooth for 10-15 seconds, rinsed with water and dried with an air gun; adhesive is evenly applied to the surface of the abutment tooth, left to stand for 20 seconds and then dried, left to stand for another 20 seconds, and then cured by irradiating each direction of the abutment tooth with a light curing lamp for 10 seconds.

8. The method for manufacturing a 3D printed resin-filled guide plate according to claim 7, characterized in that: In step S5, the filling resin is a paste resin or an injection resin; when filling with paste resin, a metal filling instrument is used to select and compact it in small amounts multiple times to avoid voids and air bubbles; the injection resin is squeezed and injected into the guide plate, and the distance from the resin edge to the resin filling guide plate is 0.2-0.5mm.

9. A method for manufacturing a 3D printed resin-filled guide plate according to claim 8, characterized in that: In step S5, after the resin-filled guide plate is pressed into place by the abutment tooth, the precise placement of the guide plate is checked through the placement observation window, and the height of the guide plate is ensured to be parallel to the adjacent tooth. After removing excess resin from the edge of the guide plate and the overflow hole, the resin is cured by light curing lamp along all directions of the resin-filled guide plate. The light intensity of the light curing lamp is 2000mW / cm², and a rapid curing mode of 3 seconds is used.

10. A method for manufacturing a 3D printed resin-filled guide plate according to claim 9, characterized in that: In step S6, the resin filling guide is gently removed by polishing with a dental polishing bur. The resin that has not been fully cured is then fully cured by irradiating it from all directions with a light curing lamp before being adjusted and polished.

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