A dental implant guide plate based on 3D printing and a manufacturing method thereof

Abstract

The present invention relates to a dental implant guide plate based on 3D printing, comprising a base and a guide hole, wherein the base comprises a positioning part for opening the guide hole, and a fixing part integrally connected to the lower end of the positioning part, wherein a planting point sleeve is arranged in the guide hole, a notch is arranged on the guide hole, and an adapter block matching the notch is arranged on the planting point sleeve, and the planting point sleeve is fastened in the guide hole, and in the process of drilling a bone hole inside the gum through the guide hole using a medical drilling tool, the drill bit displacement is avoided, and the positioning accuracy of the dental implant guide plate is improved; a method for a dental implant guide plate based on 3D printing is also disclosed, comprising the steps of: making a plaster model; reconstructing a three-dimensional model of teeth and bones in the oral and maxillary region of a patient; obtaining three-dimensional model data of the dental implant guide plate; and printing the dental implant guide plate. The present invention adopts 3D printing technology to shorten the production cycle of the entire reconfigurable guide plate, and realizes the rapid production of the base plate and the on-site reconstruction of the guide plate.

Description

Technical Field

[0001] The present invention belongs to the field of dentistry, and in particular relates to a 3D printing-based dental implant guide plate and a manufacturing method thereof. Background Art

[0002] Dental implant surgery is a process of making dentures. A hole is drilled in the gums of the affected area, and an artificial tooth root (i.e. implant) made of titanium or other suitable materials is implanted into the alveolar bone of the mouth to replace the original tooth root of the affected area. After the implant is tightly integrated with the bone, the denture is reconstructed. Dental implant guides are tools used to assist doctors in accurately finding the depth and direction of the implant. During the oral implant surgery, implant guides can accurately guide the implant location and hole preparation, avoiding complications caused by implant site deviation due to poor vision, skewed viewing angle, etc., and reducing the difficulty of the surgery.

[0003] In actual operation, computer-aided design and manufacturing are usually adopted, that is, before the dental implant surgery, a three-dimensional model of the jaw is reconstructed through the patient's maxillofacial CT images, the appropriate implant type is selected according to the image data of the jaw, and the digital surgical guide is selected and designed in combination with the implant's teeth, bone mass and other information, and finally the overall implant surgery plan is obtained; however, the success of implantation using a digital surgical guide depends to a large extent on the selection of the guide support method and the positioning reference. If the guide is not positioned accurately, or it is offset during the operation due to poor support, it will definitely cause the implant to be placed in an inaccurate position, thus leading to the failure of the implant surgery or the failure of the implant denture restoration.

[0004] The existing Chinese patent with publication number CN202920377U discloses a universal guide plate for dental implant surgery, including an upper guide plate and a lower guide plate, the lower guide plate is located below the upper guide plate, and side plates are respectively provided on both sides of the upper guide plate and the lower guide plate, and the upper guide plate side plates and the lower guide plate side plates are slidably connected through a card slot and a card block, and scales with an interval of 1mm are respectively provided on both sides of the upper guide plate and the lower guide plate, and implant holes with an interval of 2mm are also provided in the middle of the upper guide plate and the lower guide plate.

[0005] As shown above, due to the unevenness of the gums, when the base fits the teeth, it can only fit the protruding part of the teeth, and the gums are squeezed and deformed, which is not conducive to the accurate positioning of the implant guide. There are deficiencies that need to be improved. Summary of the invention

[0006] In view of this, the present invention proposes a 3D printing-based dental implant guide and a manufacturing method thereof, and the technical solution adopted is:

[0007] A 3D-printed dental implant guide comprises a base and a guide hole, wherein the base comprises a positioning portion for opening the guide hole, and a fixing portion integrally connected to the lower end of the positioning portion, wherein a planting point sleeve is arranged in the guide hole, a notch is arranged on the guide hole, and an adapter block matching the notch is arranged on the planting point sleeve.

[0008] The fixing part is arranged opposite to the gums, and an adaption groove for accommodating teeth is provided on the side of the fixing part facing the gums. A plurality of adaption grooves are arranged along the length of the fixing part, and the inner wall of the adaption groove is arranged in an arc shape. A permeable plate is arranged on the arc inner wall of the adaption groove close to the inside of the oral cavity, a permeable film layer is arranged between the permeable plate and the inner wall of the adaption groove, and an elastic strip is arranged on the arc inner wall of the adaption groove away from the inside of the oral cavity.

[0009] Preferably, a plurality of grids are arranged on the permeation plate, and rubber protrusions are arranged at the intersection points of adjacent grids.

[0010] Preferably, a water outlet channel is provided on the fixing portion, and the water outlet channel is communicated with the permeable membrane layer.

[0011] Preferably, the penetration plate is arranged in an arc shape, and when the teeth are embedded in the adapting groove, a plurality of rubber protrusions on the penetration plate fit on the teeth.

[0012] Preferably, the implantation point sleeve is a metal tube, the inner diameter of the metal tube is 2.3 to 4 mm, and the length is 1 to 3 mm.

[0013] A method for a dental implant guide based on 3D printing, comprising the following steps:

[0014] Step 1: Make a plaster model: Use silicone rubber to collect the patient's oral dental area to form a dental model, and use plaster to pour the dental model;

[0015] Step 2: Reconstruct the three-dimensional model of the patient's teeth and bones in the oral and maxillary area:

[0016] 1) Perform CBCT scan on the patient's oral and maxillofacial area to obtain CBCT image data,

[0017] 2) Record the acquired CBCT image data in standard DICOM format and save it as a CD file.

[0018] 3) The computer stored in the general medical image control system software reads the patient's oral and maxillary area image data from the storage medium, uses the medical image control system software to perform three-dimensional reconstruction of the patient's oral and maxillary area, and extracts the structural information of the patient's bone tissue, maxillary sinus, and mandibular nerve.

[0019] 4) Use a laser scanner to optically scan the plaster model made in step 1 to obtain tooth surface data.

[0020] 5) Align the CBCT image data with the optical scan data to reconstruct a three-dimensional model of the patient's teeth and bones in the oral cavity;

[0021] Step 3: Obtain the 3D model data of the dental implant guide:

[0022] 1) Use 3Shape Implant Studio implant design software to complete the planning and design of the implant plan and determine the size, position and direction of the implant.

[0023] 2) Design a standardized template corresponding to the guide template drill bit. Combine the standardized template with the patient's three-dimensional model of the oral and maxillofacial area reconstructed in step 2 to obtain a preliminary guide model. Select the implant model determined according to step 1) in the software and process the preliminary guide model into a three-dimensional model of the implant guide.

[0024] 3) Determine the size of the guide hole of the final dental implant guide according to the three-dimensional model of the patient's oral and maxillofacial area reconstructed in step 2, and design a three-dimensional model of the dental implant guide corresponding to the guide hole in combination with the three-dimensional model of the dental implant guide.

[0025] 4) Use software to design the three-dimensional model of the dental implant guide to achieve the required state.

[0026] Step 4: Print the dental implant guide: import the 3D model data of the manufactured dental implant guide into the 3D printer, use the layering software to layer the solid 3D model data, and obtain the layer data. The control software performs reverse engineering and manufacturing based on the layer data, including layer printing and layer stacking, and finally obtains the dental implant guide.

[0027] Compared with existing technologies:

[0028] 1. The present invention provides a notch on the guide hole, and provides a group of adapter blocks matching the notch on the implant point sleeve, so that the implant point sleeve is fastened in the guide hole, thereby improving the stability of the dental implant guide during the doctor's operation of the drill bit, making the dental implant guide difficult to move, and improving the positioning accuracy of the dental implant guide.

[0029] 2. The inner wall of the adapting groove of the present invention is arranged in an arc shape, a permeable plate is arranged on the arc-shaped inner wall of the adapting groove close to the inside of the oral cavity, a permeable film layer is arranged between the permeable plate and the inner wall of the adapting groove, and an elastic strip is arranged on the arc-shaped inner wall of the adapting groove away from the inside of the oral cavity. On the one hand, the adapting groove is arranged in an arc shape, and a one-way permeable permeable film layer is arranged at one end where the drainage hole is connected to the adapting groove, so that the gums can be more completely embedded in the adapting groove and the cleanliness of the adapting groove is improved, and the permeable film and the gums are reduced. The gap is reduced, which reduces the amount of accumulated water between the two and the contamination of the gums by the accumulated water, improves the cleanliness of the operating environment and improves the positioning accuracy of the implant guide; on the other hand, a plurality of grids are arranged on the infiltration plate, and rubber protrusions are arranged at the intersection points of adjacent grids, and the rubber protrusions cooperate with the elastic strips arranged on the arc-shaped inner wall. When the implant guide is installed, the teeth are embedded in the adaptation groove of the fixed part of the implant guide, so that the teeth can be more adapted to the adaptation groove, the deformation of the gums is reduced, and the positioning accuracy of the implant guide is improved.

[0030] 3. In the production process of the present invention, the gypsum model three-dimensional model and the CT three-dimensional model image are aligned in a preset manner, and factors such as bone density and blood vessels around the patient's gingival bone position are combined to the maximum extent, thereby improving the accuracy of dental implants; and virtual implantation is performed in the aligned three-dimensional model image, which is beneficial to improving the implantation efficiency of dental implants and shortening the time for doctors' clinical operations and patients' consultations.

[0031] 4. The present invention uses 3D printing technology to shorten the production cycle of the entire reconfigurable guide plate, realizes the rapid production of the base plate and on-site reconstruction of the guide plate, shortens the treatment cycle, and reduces treatment costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a structural schematic diagram of an embodiment of a 3D printing-based dental implant guide disclosed in the present invention;

[0033] Figure 2 for Figure 1 Schematic diagram of the structure of the middle matrix;

[0034] Figure 3 for Figure 1 Schematic diagram of the structure of the middle planting point casing;

[0035] Figure 4 for Figure 2 Schematic diagram of the structure of the middle permeable plate;

[0036] Figure 5 This is a workflow diagram of an embodiment of a method for making a dental implant guide based on 3D printing disclosed in the present invention. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments.

[0038] like Figure 1 As shown, the present invention specifically discloses a 3D printed dental implant guide plate, comprising a base and a guide hole 3. Before implanting a tooth, a hole needs to be drilled on a bone wrapped in the gums. The base and the gums are relatively fixed, and the guide hole is aligned with the part where the tooth needs to be implanted, and then a relevant medical tool is used to drill a hole from the guide hole into the bone.

[0039] The base includes a positioning portion 1 for opening the guide hole 3, and a fixing portion 2 integrally connected to the lower end of the positioning portion 1, a planting point sleeve 12 is arranged in the guide hole 3, a notch 4 is arranged on the guide hole 3, and an adapting block 13 matching the notch 12 is arranged on the planting point sleeve 12, the fixing portion 2 is arranged opposite to the gums, and an adapting groove 6 for accommodating teeth is opened on the side of the fixing portion 2 facing the gums, and the adapting grooves 6 are arranged along the length of the fixing portion 2, and the inner wall of the adapting groove 6 is arranged in an arc shape, and a permeation plate 10 is arranged on the arc inner wall of the adapting groove 6 close to the inside of the oral cavity, a permeation film layer 8 is arranged between the permeation plate 10 and the inner wall of the adapting groove 6, and an elastic strip 9 is arranged on the arc inner wall of the adapting groove 6 away from the inside of the oral cavity.

[0040] like Figure 2 As shown, the middle of the gum is usually wider than the two sides, and the adaption groove 6 is set to be arc-shaped to adapt to the gum. When the implant guide is installed, the gum is embedded in the adaption groove 6 of the fixed plate in the implant guide, and the protruding part of the gum is embedded in the depression of the adaption groove 6, thereby reducing the deformation of the gum while increasing the contact area between the adaption groove 6 and the gum, thereby improving the positioning accuracy of the implant guide.

[0041] There is a ridge at the intersection of adjacent adaptation grooves 6 that is adapted to the groove at the intersection of adjacent gums. The ridge at the intersection of adjacent adaptation grooves is set to have a rounded edge 7, which increases the contact area between the fixed part and the gums and reduces the pressure between the gums and the ridge, thereby effectively reducing the phenomenon of gum rupture and bleeding during surgery and improving the adaptability between the fixed part and the gums.

[0042] like Figure 3As shown, the guide hole 3 is provided with a notch 4, and the implantation point sleeve 12 is provided with an adapter block 13 matching the notch 4. The implantation point sleeve 12 is fastened in the guide hole 3. During the process of using a medical drilling tool to pass through the guide hole 3 to drill a hole in the bone inside the gum, the firmness of the implantation point sleeve 12 avoids displacement of the drill bit and improves the positioning accuracy of the implant guide.

[0043] like Figure 4 As shown, preferably, a plurality of grids are provided on the penetration plate 10, and rubber protrusions 11 are provided at the intersection points of adjacent grids. The penetration plate 10 is provided in an arc shape. When the teeth are embedded in the adaptation groove 6, the plurality of rubber protrusions on the penetration plate 10 fit on the teeth. The rubber protrusions 11 described above cooperate with the elastic strips 9 provided on the arc-shaped inner wall of the adaptation groove 6 facing away from the inside of the oral cavity. When the implant guide is installed, the teeth are embedded in the adaptation groove 6 of the implant guide fixing part 2, so that the teeth can be more adapted to the adaptation groove 6, thereby reducing the deformation of the gums and improving the positioning accuracy of the implant guide.

[0044] Preferably, a water outlet channel 5 is provided on the fixing portion 2, and the water outlet channel 5 is connected to the permeable film layer 8. A permeable film layer 8 is provided between the permeable plate 10 and the inner wall of the adapting groove 6. The film layer is a one-way permeable membrane, so that the accumulated water between the gums and the adapting groove 6 flows out from the drainage channel, ensuring that the gums can be more intactly embedded in the adapting groove 6, and improving the cleanliness of the adapting groove 6, reducing the gap between the permeable film 8 and the gums, reducing the accumulated water remaining between the two, reducing the contamination of the gums by the accumulated water, improving the cleanliness of the operating environment and improving the positioning accuracy of the implant guide.

[0045] Preferably, the implantation point sleeve 12 is a metal tube, the inner diameter of the metal tube is 2.3-4 mm, and the length is 1-3 mm. More preferably, the inner diameter of the metal tube is 2.5 mm, 2.8 mm, 3.0 mm, 3.3 mm, 3.5 mm, 3.8 mm or 4.0 mm, and the outer diameter of the metal tube matches the inner diameter of the guide hole 3, and the inner diameter of the guide hole 3 is determined according to the size of the implant.

[0046] like Figure 5 As shown, the present invention also discloses a method for a dental implant guide plate based on 3D printing, comprising the following steps:

[0047] Step 1: Make a plaster model: Use silicone rubber to collect the patient's oral dental area to form a dental model, and use plaster to pour the dental model;

[0048] Step 2: Reconstruct the three-dimensional model of the patient's teeth and bones in the oral and maxillary area:

[0049] 1) Perform CBCT scan on the patient's oral and maxillofacial area to obtain CBCT image data,

[0050] In this step, CBCT is the abbreviation of Cone beam CT, which is a cone beam CT. It is a cone beam projection computerized reconstruction tomography device. Its principle is that the X-ray generator uses a low radiation dose (usually the tube current is about 10mA) to perform circular DR (digital projection) around the projection object.

[0051] 2) Record the acquired CBCT image data in standard DICOM format and save it as a CD file.

[0052] 3) The computer stored in the general medical image control system software reads the patient's oral and maxillary area image data from the storage medium, uses the medical image control system software to perform three-dimensional reconstruction of the patient's oral and maxillary area, and extracts the structural information of the patient's bone tissue, maxillary sinus, and mandibular nerve.

[0053] 4) Use a laser scanner to optically scan the plaster model made in step 1 to obtain tooth surface data.

[0054] 5) Align the CBCT image data with the optical scan data to reconstruct a three-dimensional model of the patient's teeth and bones in the oral cavity;

[0055] Step 3: Obtain the 3D model data of the dental implant guide:

[0056] 1) Use 3Shape Implant Studio implant design software to complete the planning and design of the implant plan and determine the size, position and direction of the implant.

[0057] 2) Design a standardized template corresponding to the guide template drill bit. Combine the standardized template with the patient's three-dimensional model of the oral and maxillofacial area reconstructed in step 2 to obtain a preliminary guide model. Select the implant model determined according to step 1) in the software and process the preliminary guide model into a three-dimensional model of the implant guide.

[0058] 3) Determine the size of the guide hole of the final dental implant guide according to the three-dimensional model of the patient's oral and maxillofacial area reconstructed in step 2, and design a three-dimensional model of the dental implant guide corresponding to the guide hole in combination with the three-dimensional model of the dental implant guide.

[0059] 4) Use software to design the three-dimensional model of the dental implant guide to achieve the required state.

[0060] Step 4: Print the dental implant guide: import the 3D model data of the manufactured dental implant guide into the 3D printer, use the layering software to layer the solid 3D model data, and obtain the layer data. The control software performs reverse engineering and manufacturing based on the layer data, including layer printing and layer stacking, and finally obtains the dental implant guide.

[0061] In step three, the size of the guide hole is confirmed by simulating implantation in the registered three-dimensional model image to design the size of the guide hole. This step is implemented through software, and the method is known and will not be repeated here.

[0062] The dental implant guide plate obtained in step 4 is post-processed, including smoothing it, fixing the elastic strip, and placing the permeable film layer and the permeable plate. The permeable plate is embedded in the insertion groove on the adjacent rounded edge, and the insertion groove is not shown in the figure.

[0063] The specific implementation process of the dental implant guide is as follows: the dental implant guide is fixed to the gums, wherein a planting point sleeve 12 is provided in the guide hole 3 opened on the positioning part 1 in the base, the planting point sleeve 12 is clamped in the guide hole 3, the planting point sleeve 12 is aligned with the gums of the teeth to be implanted, the fixing part 2 at the lower end of the positioning part 1 is clamped on the inside and outside of the gums, the gums are embedded in the adaptation groove 6 fixed on the fixing part 2, and when the gums are embedded in the adaptation groove 6, extrusion is formed between the gums and the permeation plate 10 and the elastic strip 9, the accumulated water in the adaptation groove 6 flows from the water outlet channel 5 to the oral cavity through the permeable film layer 8, and finally the fixing nail is horizontally passed through the fixing part 2 and inserted into the skeleton to complete the complete positioning of the base.

[0064] The above description is only the preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A dental implant guide based on 3D printing, comprising a base and a guide hole, wherein the base comprises a positioning portion for opening the guide hole, and a fixing portion integrally connected to the lower end of the positioning portion, characterized in that: A planting point sleeve is arranged in the guide hole, a notch is arranged on the guide hole, and an adapter block matching with the notch is arranged on the planting point sleeve. The fixing part is arranged opposite to the gums, and an adapting groove for accommodating teeth is provided on the side of the fixing part facing the gums, and a plurality of the adapting grooves are arranged along the length of the fixing part, and the inner wall of the adapting groove is arranged in an arc shape, and a permeable plate is arranged on the arc-shaped inner wall of the adapting groove close to the inside of the oral cavity, a permeable film layer is arranged between the permeable plate and the inner wall of the adapting groove, and an elastic strip is arranged on the arc-shaped inner wall of the adapting groove away from the inside of the oral cavity; the permeable plate is arranged in an arc shape, and when the teeth are embedded in the adapting groove, a plurality of rubber protrusions on the permeable plate fit on the teeth; a plurality of grids are arranged on the permeable plate, and rubber protrusions are arranged at the intersection points of adjacent grids, and the rubber protrusions cooperate with the elastic strips arranged on the arc-shaped inner wall; a water outlet channel is arranged on the fixing part, and the water outlet channel is connected with the permeable film layer.

2. The 3D printing-based dental implant guide according to claim 1, characterized in that: The implantation point sleeve is a metal tube with an inner diameter of 2.3-4 mm and a length of 1-3 mm.

3. A method for manufacturing a 3D printing-based dental implant guide according to any one of claims 1 to 2, comprising the following steps: Step 1: Make a plaster model: Use silicone rubber to collect the patient's oral dental area to form a dental model, and use plaster to pour the dental model; Step 2: Reconstruct the three-dimensional model of the patient's teeth and bones in the oral and maxillary area: 1) Perform CBCT scan on the patient's oral and maxillofacial area to obtain CBCT image data. 2) Record the acquired CBCT image data in the standard DICOM format and save it as a CD file. 3) The computer stored in the general medical image control system software reads the patient's oral and maxillary area image data from the storage medium, and uses the medical image control system software to perform three-dimensional reconstruction of the patient's oral and maxillary area. The structural information of the patient's bone tissue, maxillary sinus, and mandibular nerve has been extracted. 4) Use a laser scanner to optically scan the plaster model made in step 1 to obtain tooth surface data. 5) Align the CBCT image data with the optical scan data to reconstruct a three-dimensional model of the patient's teeth and bones in the oral cavity; Step 3: Obtain the 3D model data of the dental implant guide: 1) Use 3Shape Implant Studio implant design software to complete the planning and design of the implant plan and determine the size, position and direction of the implant. 2) Design a standardized template corresponding to the guide template drill bit, combine the standardized template with the patient's oral and maxillofacial area 3D model reconstructed in step 2 to obtain a preliminary guide model, select the implant model determined according to 1) in the software, and process the preliminary guide model into a 3D model of the dental implant guide. 3) Determine the size of the guide hole of the final dental implant guide based on the patient's oral and maxillofacial area 3D model reconstructed in step 2, and design a 3D model of the dental implant guide corresponding to the guide hole in combination with the 3D model of the dental implant guide. 4) Use software to design the three-dimensional model of the dental implant guide to achieve the required state.

4. Step 4: Print the dental implant guide: Import the 3D model data of the manufactured dental implant guide into the 3D printer, use the layering software to layer the solid 3D model data, and obtain the layer data. The control software performs reverse engineering and manufacturing based on the layer data, including layer printing and layer stacking, and finally obtains the dental implant guide.

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