CN110464499B - Environment-friendly PRF film pressing guide plate system - Google Patents

Abstract

The present invention provides an environment-friendly PRF lamination guide system, comprising: a 3D printer, wherein the 3D printer includes a first scanning module arranged at one end, a second scanning module arranged at the other end, and a A first printing module and a second printing module; the first printing module scans the cross-section or shape of the toothless part of the bone to obtain the three-dimensional modeling data of the missing teeth, and uses the three-dimensional modeling function F(a,b,c,d of the missing teeth) , E) for storage and expression, the first scanning module, after determining the three-dimensional modeling function F(a,b,c,d,E) of the missing teeth, the PRF membrane function f(a,b,c, d, e), through the above determination of the three-dimensional modeling function F(a,b,c,d,E) and the PRF film function f(a,b,c,d,e) of the missing teeth, the first printing module Determine the lamination guide shape function G.

Description

An environmentally friendly PRF lamination guide system

technical field

The invention relates to the technical field of PRF material templates, in particular to an environment-friendly PRF lamination guide plate system.

Background technique

For patients with missing teeth, whether the lack of teeth is one, several or the entire dental arch, dental implants can be used as the main option. The general dental implant surgery procedure is an incision of the gums so that the doctor can see the socket. Bone structure, then drill holes in the alveolar bone at the implant site, insert the implant into the alveolar bone, connect the abutment to the implant, and finally connect the dental restoration to the abutment. The decisive factors for the success of the above implant surgery are: the implant and the alveolar bone, the implant and other teeth, and the accurate alignment between the implants.

Furthermore, at present artificial teeth are mainly made of titanium metal, which has the advantage of high mechanical strength, but titanium-based artificial teeth have disadvantages such as poor biological activity, high elastic modulus and metal ion precipitation. Cell activity is difficult to maintain. With the development of digital and information technology, a large number of high-tech digital equipment has been introduced in the field of dental implantology to varying degrees, such as radiation CBCT scanning, CT 3D reconstruction, computer virtual implantation, oral model scanning, computer-aided The application of digital technologies such as design/aided manufacturing (CAD/CAM) has been gradually popularized in large and medium-sized cities in my country, and digital technologies can help improve the efficiency and quality of dental implants.

The existing Chinese Patent Publication No. CN109203450A discloses a method for preparing a PEEK composite artificial tooth suitable for 3D printing. The surface of the tooth root is designed into a mesh-like slotted structure or a honeycomb-like hole structure, and then the PEEK composite material containing whiskers is used as the 3D printing material for the artificial tooth. The artificial tooth is surface-treated and coated with active bone paste, thereby obtaining a PEEK composite artificial tooth with superior performance.

However, the above technical solutions are still technical solutions for dental implants. Although 3D printing technology is used, in the process of implantation, due to the newly added composite materials, on the one hand, the activity of dental cells is difficult to maintain, and on the other hand, 3D printers are used to print artificial teeth. , and then surface treatment of artificial teeth, its shape often does not match the final shape of the tooth gap.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide an environment-friendly PRF lamination guide plate system to solve the above-mentioned problem of difficulty in forming dental implants.

In order to achieve the above purpose, the present invention proposes an environment-friendly PRF lamination guide system, including: a 3D printer, wherein,

The 3D printer includes a first scanning module arranged at one end, a second scanning module arranged at the other end, and a first printing module and a second printing module arranged at the middle part;

The first printing module scans the cross-section or shape of the tooth-missing part of the tooth to obtain the three-dimensional modeling data of the missing teeth, and stores and expresses the missing tooth three-dimensional modeling function F(a, b, c, d, E). In the first scanning module, after determining the three-dimensional modeling function F(a,b,c,d,E) of the missing teeth, the PRF film function f(a,b,c,d,e) is determined by calculation. Determination of the three-dimensional modeling function F(a,b,c,d,E) and the PRF film function f(a,b,c,d,e), the first printing module determines the lamination guide modeling function G,

Among them, the PRF membrane function f(a,b,c,d,e) determines the functional relationship of the inner wall of the lamination guide, and the three-dimensional modeling function F(a,b,c,d,E) of the missing teeth determines the outer side of the lamination guide the functional relationship of the wall;

After the first printing module melts the guide plate material according to the above-mentioned lamination guide shape function G, it prints from the first printing nozzle disposed on the first printing module to form the lamination guide;

After grinding the inner side wall of the lamination guide plate, the second printing module injects the PRF material into the pressure according to the PRF film function f(a, b, c, d, e) through the second printing nozzle arranged on it. Inside the film guide, the PRF film is formed;

Among them, in the above-mentioned three-dimensional modeling function F(a, b, c, d, E) of missing teeth, a represents the tooth label, which is determined from the natural number 1-24 in the order determined by the lower row of teeth and the upper row of teeth, and b represents Tooth position information, c represents the degree of tooth loss, and its value is set in the range of 0.1-0.95, and d represents the number of horizontal layers scanned, which is determined according to the scanning clarity set by the 3D printer and the cumbersome degree of data processing. The higher the value of d, the larger the value of d is. E represents the three-dimensional data of each transverse plane. By setting the reference point as the origin of coordinates, the position of the upper surface at the center of the maximum diameter of the transverse plane is set as the origin of coordinates. Set the corresponding x, y, z coordinates, or set it as a two-dimensional coordinate system, set the position of the center of the maximum diameter of the transverse plane as the coordinate origin, and determine the x and y axes.

Further, in the PRF film function f(a,b,c,d,e), a,b,c,d are consistent with the parameters in F(a,b,c,d,E), each horizontal The three-dimensional data of the surface satisfies the following formula:

E(X,Y)=e(x+x1,y+y1)(1)

E(X,Y) represents the corresponding value of the two coordinates of each transverse plane of the three-dimensional modeling function of the missing tooth;

e(x,y) represents the corresponding values of the two coordinates of each transverse plane of the PRF film function.

Further, in the above formula (1),

x1, y1 represent the thickness increment of the three-dimensional modeling function of the tooth for each transverse surface of the PRF film function, and L represents the thickness value of the corresponding lamination guide plate on each transverse surface.

Further, the thickness value L is related to the degree of tooth loss c,

L=L ₀ ×c (3)

c represents the degree of tooth loss, and its value is set in the range of 0.1-0.95. L ₀ represents the preset thickness of the guide plate, and its value is 200um. It depends on the teeth in different positions. The degree of tooth loss can be determined according to the proportion of the missing part in the height direction of the entire tooth. However, the preset height of the teeth is 1.5cm-2.5cm, and the proportion of the missing part determines the degree of tooth loss.

Further, after the lamination guide plate is formed, the second scanning module scans the inner side wall of the lamination guide plate to form a function f(a1, b1, c1, d1, e1) of the inner side wall of the lamination guide plate, and the lamination guide plate is formed. The inner side wall function f(a1,b1,c1,d1,e1) of the guide plate is compared with the PRF film function f(a,b,c,d,e), and polished according to the difference between the two, so that under the same coordinate system, The three-dimensional value of each lateral surface of the inner sidewall of the lamination guide plate is less than or equal to the corresponding value of the PRF film function.

Further, after completing the forming of the PRF film, the first printing module re-acquires the lamination guide shape function G, which is also the bone meal shape function,

The first printing module injects bone powder gel on the surface of the PRF film after forming according to the above procedure. The bone powder gel is formed in the same way as the lamination guide plate. The plastic shape function F(a1,b1,c1,d1,E1) is compared with the missing tooth three-dimensional modeling function F(a,b,c,d,E), and then polished to achieve the missing tooth three-dimensional modeling function F (a,b,c,d,E) same data.

Further, the manufacturing process of the PRF membrane is as follows: blood is drawn intravenously and placed in a sterile test tube without antithrombin; the test tube is immediately centrifuged at 3000r/min for 10min; after standing, the blood sample can be divided into 3 layers , between the red blood cell fragments at the bottom layer and the pale yellow clear liquid platelet plasma at the top layer, take out the pale yellow gel in the middle layer, which is platelet-rich fibrin; discard the supernatant and remove the red blood cell part at the bottom of the gel, Obtain the primary PRF gel, and then place it in a dry and sterilized container for 10 minutes to make it shrink naturally and release the serum in it, or use sterile gauze to absorb the serum, and at the same time, squeeze and shape to prepare a certain shape. , elastic and tough platelet-rich fibrin membrane.

Further, the bone meal gel includes polylactic acid and mineralized collagen, the mass of which is 160% to 200% of the mass of the polylactic acid; the mass of porous hydroxyapatite is the mass of the polylactic acid. 35% to 40%.

Further, the center of the first printing nozzle and the second printing nozzle are aligned, and a lateral guide rail is arranged on the platen of the 3D printer to enable the two printing modules to move relative to each other, wherein the relative movement of the two printing nozzles is The surfaces are arc-shaped surfaces, and an induction sensor is arranged in the center of the arc-shaped surface to collect and calibrate the positions of the two printing modules. There are also induction bars on the opposite surfaces of the two printing modules to sense their respective positions.

Further, the two ends of the platen are respectively provided with a first support table and a second support table, and a first scanning module and a second scanning module are respectively placed on the two support tables to support them respectively; An adjustment column is also arranged between the two support platforms, and a plurality of adjustment holes with a certain depth arranged up and down are respectively arranged on the opposite sides of the two support platforms.

Compared with the prior art, the beneficial effect of the present invention is that the present invention scans the shape of the tooth missing part of the tooth by a 3D printer to obtain shape data, and uses the three-dimensional reconstruction technology to simulate the three-dimensional shape of the tooth of the missing part of the tooth. Determine the 3D shape of the lamination guide. During the printing process, first print the lamination guide, then scan the inner side of the lamination guide, compare the 3D modeling data of the inner side of the lamination guide with the 3D shape of the teeth, and polish the inner side of the lamination guide. After that, the printer is used to output PRF lamination to print the teeth, and the missing teeth are formed. The 3D printer outputs bone powder on the periphery of the formed teeth according to the three-dimensional modeling of the lamination guide, and grinds the periphery of the bone powder to complete the operation.

In particular, the present invention sets the first printing module to scan the section or shape of the tooth-missing part of the tooth to obtain the three-dimensional modeling data of the missing tooth, and stores and expresses it through the three-dimensional modeling function F(a, b, c, d, E) of the missing tooth. , the first scanning module, after determining the three-dimensional modeling function F(a,b,c,d,E) of the missing teeth, then determining the PRF membrane function f(a,b,c,d,e) by calculation, through the above For the determination of the three-dimensional modeling function F(a,b,c,d,E) of the missing teeth and the PRF film function f(a,b,c,d,e), the first printing module determines the modeling function G of the lamination guide plate , after grinding the inner side wall of the lamination guide plate, the second printing module injects the PRF material through the second printing nozzle arranged on it according to the PRF film function f(a,b,c,d,e) Inside the lamination guide, the PRF film is formed. Therefore, the present invention uses an integral PRF membrane for tooth restoration. On the one hand, it can maintain the activity of pressing cells and repair the dental pulp. On the other hand, the 3D-shaped PRF membrane and bone powder gel structure can provide a barrier and support effect. In addition, the present invention uses 3D molding technology to form a lamination guide plate first, which is equivalent to forming a mold, and then forms a PRF film through the lamination guide plate, which overcomes the defect of unstable shape of a single PRF film, can be formed at one time, and prevents infection.

In particular, the material of the lamination guide plate of the present invention is inorganic materials such as PE film and PVC film, whose melting point is higher than 100°C, and can also be ceramic materials such as silicon carbide, silicon nitride, and aluminum oxide with a high melting point, which only needs to be 3D printed. After outputting the molten slurry, it can be molded.

In particular, the present invention is provided with two sets of scanning modules and printing modules, which respectively shape the lamination guide plate and the PRF film successively, and adjust the alignment accuracy of the two parts through the guide rail mechanism and the positioning adjustment structure, so as to realize fast and accurate printing and printing. forming.

In particular, in the present invention, after the lamination guide is formed, the second scanning module scans the inner side wall of the lamination guide 10 to form a function f(a1, b1, c1, d1, e1) of the inner side wall of the lamination guide. The wall function f(a1,b1,c1,d1,e1) is compared with the PRF film function f(a,b,c,d,e), and grinding is carried out according to the difference between the two, so that under the same coordinate system, the film is laminated. The three-dimensional value of each lateral surface of the inner sidewall of the guide plate is less than or equal to the corresponding value of the PRF film function, so that the PRF material can be fully filled.

Description of drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are for the purpose of illustrating preferred embodiments only and are not to be considered limiting of the invention. Also, the same components are denoted by the same reference numerals throughout the drawings. In the attached image:

1 is a schematic structural diagram of an environment-friendly PRF lamination guide system according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of a molding structure of a lamination guide according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of the molding structure of the PRF laminated tooth according to the embodiment of the present invention.

Detailed ways

Preferred embodiments of the invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principle of the invention, and are not intended to limit the protection scope of the invention.

It should be noted that, in the description of the invention, the terms “upper”, “lower”, “left”, “right”, “inner”, “outer” and other terms indicated in the direction or the positional relationship are based on the terms shown in the accompanying drawings The direction or positional relationship is only for the convenience of description, rather than indicating or implying that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the invention.

In addition, it should be noted that, in the description of the invention, unless otherwise expressly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it may be a fixed connection or a Removable connection, or integral connection; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be internal communication between two components. For those skilled in the art, the specific meanings of the above terms in the invention can be understood according to specific situations.

Please refer to FIG. 1 , which is a schematic structural diagram of an environment-friendly PRF lamination guide system according to an embodiment of the present invention, including a 3D printer 1. The 3D printer scans the shape of the missing teeth of the tooth to obtain shape data, and uses 3D reconstruction. The technology simulates the 3D shape of the missing tooth, and then determines the 3D shape of the lamination guide according to the thickness of the bone powder. During the printing process, the lamination guide is first printed, and then the inner side of the lamination guide is scanned, and the 3D shape data of the inner side of the lamination guide is compared with the 3D shape of the lamination guide. The three-dimensional modeling of the teeth was compared, the inner side of the lamination guide was polished, and then the PRF lamination was used to print the teeth, and the missing teeth were partially formed. Sand and finish.

Specifically, PRF (platelet-rich fibrin membrane) is a gel-like soft material, which is not easy to form directly by 3D printing. The PRF membrane is characterized by forming a mold with a lamination guide plate, and then bone powder gel is applied to the periphery of the PRF membrane, that is, Repair damaged teeth and pulp.

Specifically, the manufacturing process of the PRF membrane in the embodiment of the present invention is as follows: blood is drawn intravenously and placed in a sterile test tube without antithrombin; the test tube is immediately centrifuged at 3000 r/min for 10 min; after standing, the blood sample can be Divided into 3 layers, between the red blood cell debris in the bottom layer and the pale yellow clear liquid platelet plasma in the top layer, take out the pale yellow gel in the middle layer, which is platelet-rich fibrin; discard the supernatant and remove the bottom of the gel The erythrocyte part, obtain the primary PRF gel, and then put it in a dry and sterile container for 10 minutes to naturally shrink and release the serum in it, or use sterile gauze to absorb the serum, and at the same time, it is prepared by extrusion molding. A platelet-rich fibrin membrane with certain shape, elasticity and toughness is produced.

Specifically, the bone meal gel according to the embodiment of the present invention includes polyracemic lactic acid and mineralized collagen, the mass of which is 160% to 200% of the mass of the polyracemic lactic acid; porous hydroxyapatite, the mass of which is the 35% to 40% of the quality of the lactic acid. The production process is as follows: preparing a polyracemic lactic acid solution; adding mineralized collagen into the polyracemic lactic acid solution and mixing, and then adding porous hydroxyapatite and mixing to obtain a mixed solution; pouring the mixed solution into a mold lyophilize the mold; decompose the material obtained after the lyophilization; pulverize the decomposed material; and sieve the particles obtained after the pulverization to obtain a PLA-based dental bone powder. This is a conventional manufacturing method and will not be repeated here. Among them, the molecular weight of poly(lactic acid) is preferably 115000-85000, and the mineralized collagen is prepared by the following method: add 120-180 mL of glacial acetic acid into the reaction kettle, pour in purified water to make the total volume reach 3-6L, and then add 3 ~8g of collagen sponge with stirring turned on. Dissolve 12 to 15 g of calcium chloride with purified water, filter through quantitative filter paper, and flow into a 200 mL volumetric flask for later use. Weigh a certain mass of phosphoric acid so that the molar ratio of phosphorus in the solution to calcium in the calcium chloride solution is 1 to 3:1. Dissolve phosphoric acid with an appropriate amount of purified water, filter it through quantitative filter paper, and pour it into a 200 mL volumetric flask for later use. Dissolve 10 to 30 grams of sodium hydroxide with 400 mL of purified water for later use. 300-800 mL of the prepared calcium chloride solution is slowly added to the stirred acid-dissolved collagen solution while stirring, and the mixture is fully reacted and stirred for 2-8 hours. Then, 250-500 mL of the prepared phosphoric acid solution was continuously added into the above reaction system, and the reaction was fully stirred for 1-5 hours. Add the prepared sodium hydroxide solution into the reaction system, measure the pH value, stop the dropwise addition when the pH value is 6-8, continue stirring the mixed solution for 5-24 hours, and then settle for static precipitation, and wash the precipitation. The washed precipitate was freeze-dried to obtain mineralized collagen. This is a common production method, which will not be repeated here.

Specifically, the material of the lamination guide plate is inorganic materials such as PE film and PVC film, whose melting point is higher than 100 °C, and can also be ceramic materials such as silicon carbide, silicon nitride, and aluminum oxide with a high melting point. After outputting the molten slurry, it can be molded.

1 , the 3D printer of this embodiment includes a first scanning module 17 arranged at one end, a second scanning module 27 arranged at the other end, and a first printing module 21 and a second printing module arranged in the middle part twenty two. Wherein, the first scanning module 17 scans the section or shape of the tooth to be repaired, and generates a three-dimensional model of the missing tooth of the missing tooth, that is, the three-dimensional model of the missing tooth, through the three-dimensional model function of the missing tooth F(a, b, c, d, E) are stored and expressed, where a represents the tooth label, which is determined from the natural number 1-24 according to the order determined by the lower row of teeth and the upper row of teeth, and b represents the tooth position information, which is located in the oral cavity. , to facilitate the positioning of the teeth, c represents the degree of tooth loss, and its value is set in the range of 0.1-0.95. Since the tooth loss is serious, the repair volume needs to be large. The thickness of the bone meal is determined according to the degree of deletion, and d represents the number of horizontal layers scanned. It is determined according to the scanning clarity set by the 3D printer and the cumbersome degree of data processing. The higher the scanning clarity, the larger the set d value. E Represents the three-dimensional data of each transverse plane, which is set by setting the reference point as the coordinate origin, such as setting the upper surface position at the center of the maximum diameter of the transverse plane as the coordinate origin, setting the corresponding x, y, z coordinates, of course , or regardless of the thickness of the transverse plane, it is set as a two-dimensional coordinate system, and the position of the center of the maximum diameter of the transverse plane is set as the coordinate origin, and the x and y axes are determined.

Specifically, the first scanning module 17, after determining the three-dimensional modeling function F(a,b,c,d,E) of the missing teeth, determines the PRF film function f(a,b,c,d, e), a, b, c, d are consistent with the parameters in F(a, b, c, d, E). in,

E(X,Y)=e(x+x1,y+y1) (1)

E(X,Y) represents the corresponding value of the two coordinates of each transverse plane of the three-dimensional modeling function of the missing tooth;

e(x,y) represents the corresponding values of the two coordinates of each transverse plane of the PRF film function;

x1, y1 represent the thickness increment of each transverse surface of the tooth three-dimensional modeling function to each transverse surface of the PRF film function, and L represents the thickness value of the corresponding lamination guide plate on each transverse surface, as shown in Figure 2. In this embodiment, the thickness L is related to the degree of tooth loss c,

L=L ₀ ×c (3)

In this embodiment, c represents the degree of tooth loss, and its value is set in the range of 0.1-0.95. L ₀ represents the preset thickness of the guide plate, and its value is 200um. It depends on the teeth in different positions. The degree of tooth loss can be determined according to the proportion of the missing part. The proportion of the entire tooth height direction is determined. The preset height of the tooth is 1.5cm-2.5cm, and the proportion of the missing part determines the degree of tooth loss.

The thickness of the guide plate in the embodiment of the present invention increases with the increase of the degree of tooth loss. When a larger volume of teeth needs to be repaired, the thickness of the guide plate increases along with it, which plays a good supporting role. After that, the thickness of the bone powder is the same as the thickness of the guide plate, and the thickness of the corresponding bone powder is also increased in order to provide the strength of the whole restored tooth.

Specifically, through the above determination of the three-dimensional modeling function F(a,b,c,d,E) of the missing teeth and the PRF membrane function f(a,b,c,d,e), the modeling function of the lamination guide plate is finally determined. G,

Among them, the PRF membrane function f(a,b,c,d,e) determines the functional relationship of the inner wall of the lamination guide, and the three-dimensional modeling function F(a,b,c,d,E) of the missing teeth determines the outer side of the lamination guide function of the wall.

Referring to FIG. 1 , the first printing module 21 of this embodiment melts the guide plate material according to the above-mentioned lamination guide shape function G, and then prints from the first printing nozzle 31 disposed on the first printing module 21 to form a lamination film. The guide plate 10, that is, the forming mold of the PRF film. After the lamination guide 10 is formed, the second scanning module 27 scans the inner wall of the lamination guide 10 to form a function f(a1, b1, c1, d1, e1) of the inner wall of the lamination guide, and the function of the inner wall of the lamination guide Compare f(a1,b1,c1,d1,e1) with the PRF film function f(a,b,c,d,e), and grind according to the difference between the two, so that under the same coordinate system, the inner side of the lamination guide plate The three-dimensional value of each transverse plane of the wall is less than or equal to the corresponding value of the PRF film function in order to be able to fill the PRF material sufficiently. After grinding the inner sidewall of the lamination guide plate, the second printing module 22 injects the PRF material into the pressure according to the PRF film function f(a, b, c, d, e) through the second printing nozzle 32 disposed thereon. Inside the film guide plate 10, the PRF film is formed, and the PRF film is taken out for use.

1 , in this embodiment, the center of the first printing nozzle 21 and the second printing nozzle 22 are aligned, and a horizontal guide rail 16 is provided on the platen 13 of the 3D printer to enable the two printing modules to move relative to each other . In this embodiment, the opposite surfaces of the two printing nozzles are arc-shaped surfaces, respectively, and an inductive sensor 221 is arranged at the center of the arc-shaped surface to collect and calibrate the positions of the two printing modules. Sensing bars 223 are provided to sense their respective positions, so as to adjust the relative positions of the two modules.

As shown in FIG. 1 , the two ends of the platen 13 are respectively provided with a first support table 11 and a second support table 12 , and a first scanning module 17 and a second scanning module 27 are placed on the two support tables respectively, to support. An adjustment column 14 is also arranged between the two support platforms, and a plurality of adjustment holes 15 arranged up and down are respectively arranged on the opposite sides of the two support platforms. Move the two support tables to adjust the relative position.

With reference to FIG. 1 , both the first scanning module 17 and the second scanning module 27 in this embodiment can move laterally, and the CBCT tomography technology is adopted, wherein the first scanning module 17 penetrates into the first transverse axis 18 and can It moves laterally along the first transverse axis, and the free end of the first transverse axis is provided with a boss, which can limit the position of the first scanning module; correspondingly, the second scanning module 27 penetrates into the second transverse axis 28, and can move the stage position laterally along the second transverse axis. In this embodiment, the first scanning module 17 and the second scanning module 27 communicate with each other in a wired or wireless manner to exchange data. Similarly, the communication between the first printing module and the second printing module is performed in a wired or wireless manner to exchange data.

Specifically, after the PRF film is formed, the first printing module 21 re-acquires the lamination guide shape function G, which is also the bone powder shape function.

The first printing module 21 injects bone powder gel on the surface of the formed PRF film according to the above procedure. The bone powder gel is the same as the molding guide plate. After the bone powder gel is formed, the first scanning module scans to obtain the shape function of the bone powder gel. F(a1,b1,c1,d1,E1) is compared with the missing tooth three-dimensional modeling function F(a,b,c,d,E), and then polished to achieve the same as the missing tooth three-dimensional modeling function F(a, b, c, d, E) are the same data. The teeth with the completed PRF membrane and bone powder gel can be repaired on the original teeth.

Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, Alternatives and modifications, the scope of the invention is defined by the appended claims and their equivalents.

Claims (6)

1. An environment-friendly PRF pressed film guide plate system, comprising: a 3D printer, wherein,

the 3D printer comprises a first scanning module arranged at one end, a second scanning module arranged at the other end, a first printing module and a second printing module which are arranged at the middle part;

the first scanning module scans the section or the shape of the edentulous part of the tooth bone to acquire missing tooth three-dimensional modeling data, stores and expresses missing tooth three-dimensional modeling functions F (a, b, c, d, E), determines PRF membrane functions F (a, b, c, d, E) by calculation after determining the missing tooth three-dimensional modeling functions F (a, b, c, d, E), determines a squeeze film guide plate modeling function G by the determination of the missing tooth three-dimensional modeling functions F (a, b, c, d, E) and the PRF membrane functions F (a, b, c, d, E),

wherein, the PRF film function F (a, b, c, d, E) determines the functional relation of the inner side wall of the film pressing guide plate, and the missing tooth three-dimensional modeling function F (a, b, c, d, E) determines the functional relation of the outer side wall of the film pressing guide plate;

after the first printing module melts the guide plate material according to the moulding function G of the film pressing guide plate, printing is carried out from a first printing nozzle arranged on the first printing module to form the film pressing guide plate;

after the inner side wall of the film pressing guide plate is polished, the second printing module injects a PRF material into the film pressing guide plate through a second printing nozzle arranged on the second printing module according to a PRF film function f (a, b, c, d, e), and the PRF film is formed;

wherein, in the above-mentioned missing tooth three-dimensional modeling function F (a, b, c, D, E), a represents a tooth number, which is a natural number of 1-24, determined in the order determined by the lower row of teeth and the upper row of teeth, b represents tooth position information, c represents a tooth missing degree, the value setting interval is 0.1-0.95, D represents the number of transverse plane layers to be scanned, determined according to the scanning definition set by the 3D printer and the complexity of data processing, the higher the scanning definition, the larger the value D is set, E represents three-dimensional data of each transverse plane, by setting a reference point as a coordinate origin, setting an upper surface position at the center of the maximum diameter of the transverse plane as a coordinate origin, setting corresponding x, y, z coordinates, or setting a two-dimensional coordinate system, setting the position at the center of the maximum diameter of the transverse plane as a coordinate origin, determining an x axis and a y axis;

after the PRF film forming is completed, the first printing module acquires the moulding function G of the film pressing guide plate again, which is also the bone meal moulding function,

injecting bone powder gel into the surface of the PRF film formed by the first printing module according to the above procedure, wherein the bone powder gel is formed in the same way as the film pressing guide plate, scanning the bone powder gel by the first scanning module after the bone powder gel is formed to obtain a bone powder gel appearance function F (a1, b1, c1, d1 and E1), comparing the bone powder gel appearance function F (a, b, c, d and E) with a missing tooth three-dimensional modeling function F (a, b, c, d and E), and polishing the bone powder gel appearance function F to obtain the same data as the missing tooth three-dimensional modeling function F (a, b, c, d and E);

in the PRF film function F (a, b, c, d, E), a, b, c, d are consistent with parameters in F (a, b, c, d, E), and the three-dimensional data of each transverse plane satisfies the following formula:

E(X,Y)＝e(x+x1,y+y1)(1)

e (X, Y) represents two coordinate corresponding values of each transverse plane of the three-dimensional modeling function of the missing tooth;

e (x, y) represents the corresponding value of two coordinates of each transverse plane of the PRF film function;

in the above-mentioned formula (1),

x1, y1 represents the thickness increment of the PRF film function per cross plane of the tooth three-dimensional modeling function, and L represents the thickness value of the corresponding film pressing guide plate on each cross plane;

said thickness value L being related to the degree of tooth loss c,

L＝L0×c(3)

c represents the tooth missing degree, the value setting interval is 0.1-0.95, L0 represents the preset thickness of the guide plate, the value is 200um, the tooth missing degree is determined according to the tooth at different positions, the tooth missing degree can be determined according to the proportion of the missing part in the whole tooth height direction, the preset height of the tooth is 1.5cm-2.5cm, and the proportion of the missing part determines the tooth missing degree.

2. The environment-friendly PRF squeeze film guide system according to claim 1, wherein after the squeeze film guide is formed, the second scanning module scans the inner side wall of the squeeze film guide to form a squeeze film guide inner side wall function f (a1, b1, c1, d1, e1), the squeeze film guide inner side wall function f (a1, b1, c1, d1, e1) is compared with the PRF film function f (a, b, c, d, e), and grinding is performed according to the difference between the two functions, so that the three-dimensional value of each cross plane of the squeeze film guide inner side wall is less than or equal to the corresponding value of the PRF film function under the same coordinate system.

3. The environment-friendly PRF die pressing guide plate system according to claim 1, wherein the PRF film is manufactured by the following process: placing the blood in a sterile test tube without antithrombin; the tube was immediately centrifuged at 3000r/min for 10 min; after standing, the blood sample can be divided into 3 layers, and between the red blood cell fragments positioned at the bottom layer and the light yellow clarified liquid platelet plasma positioned at the top layer, light yellow gel at the middle layer is taken out, namely the platelet-rich fibrin is obtained; discarding the supernatant, removing red blood cell part at the bottom of the gel to obtain primary PRF gel, standing in a dry sterilized container for 10min to naturally contract and release serum therein, or adsorbing serum with sterile gauze, and extruding and shaping to obtain platelet-rich fibrin membrane with certain shape, elasticity and toughness.

4. The environment-friendly PRF film pressing guide plate system according to claim 3, wherein the bone meal gel comprises poly-racemic lactic acid and mineralized collagen, and the mass of the bone meal gel is 160-200% of the mass of the poly-racemic lactic acid; the mass of the porous hydroxyapatite is 35 to 40 percent of that of the poly-racemic lactic acid.

5. An environment-friendly PRF film pressing guide plate system according to claim 1, wherein the first printing nozzle and the second printing nozzle are aligned in the center, and a transverse guide rail is arranged on a platen of the 3D printer to enable the two printing modules to move relatively, wherein the opposite faces of the two printing nozzles are arc faces respectively, an induction sensor is arranged in the center of the arc face to collect and calibrate the positions of the two printing modules, and induction strips are arranged on the opposite faces of the two printing modules to respectively sense the positions.

6. The environment-friendly PRF film pressing guide plate system according to claim 5, wherein a first supporting table and a second supporting table are respectively arranged at two ends of the platen, and a first scanning module and a second scanning module are respectively arranged on the two supporting tables and respectively support the two supporting tables; an adjusting column is further arranged between the two supporting platforms, and a plurality of adjusting holes which are arranged up and down and have certain depth are respectively arranged on the opposite sides of the two supporting platforms.

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