CN113303935A - Dental implant and manufacturing method thereof - Google Patents
Dental implant and manufacturing method thereof Download PDFInfo
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- CN113303935A CN113303935A CN202110581613.9A CN202110581613A CN113303935A CN 113303935 A CN113303935 A CN 113303935A CN 202110581613 A CN202110581613 A CN 202110581613A CN 113303935 A CN113303935 A CN 113303935A
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- 239000004053 dental implant Substances 0.000 title claims abstract description 129
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 13
- 210000000988 bone and bone Anatomy 0.000 claims abstract description 46
- 238000012545 processing Methods 0.000 claims abstract description 13
- 238000000034 method Methods 0.000 claims abstract description 11
- 238000010146 3D printing Methods 0.000 claims abstract description 6
- 239000007943 implant Substances 0.000 claims description 47
- 230000001054 cortical effect Effects 0.000 claims description 13
- 238000005516 engineering process Methods 0.000 claims description 12
- 210000004373 mandible Anatomy 0.000 claims description 9
- 238000004458 analytical method Methods 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 4
- 238000004140 cleaning Methods 0.000 claims description 3
- 230000000249 desinfective effect Effects 0.000 claims description 3
- 238000002844 melting Methods 0.000 claims description 3
- 230000008018 melting Effects 0.000 claims description 3
- 210000004877 mucosa Anatomy 0.000 claims description 3
- 238000007639 printing Methods 0.000 claims description 3
- 230000002441 reversible effect Effects 0.000 claims description 3
- 238000004088 simulation Methods 0.000 claims description 3
- 238000004891 communication Methods 0.000 claims 2
- 238000002513 implantation Methods 0.000 abstract description 12
- 230000035876 healing Effects 0.000 abstract description 5
- 230000003746 surface roughness Effects 0.000 abstract description 5
- 230000000694 effects Effects 0.000 description 10
- 229910001069 Ti alloy Inorganic materials 0.000 description 7
- 238000010883 osseointegration Methods 0.000 description 7
- 239000010935 stainless steel Substances 0.000 description 7
- 238000003780 insertion Methods 0.000 description 5
- 230000037431 insertion Effects 0.000 description 5
- 229910001256 stainless steel alloy Inorganic materials 0.000 description 4
- 239000002253 acid Substances 0.000 description 3
- 238000005530 etching Methods 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- 229910001220 stainless steel Inorganic materials 0.000 description 3
- 210000001519 tissue Anatomy 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000001225 therapeutic effect Effects 0.000 description 2
- 208000029301 Mastication disease Diseases 0.000 description 1
- 208000008312 Tooth Loss Diseases 0.000 description 1
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- 230000003796 beauty Effects 0.000 description 1
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- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 210000001035 gastrointestinal tract Anatomy 0.000 description 1
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- 229910001092 metal group alloy Inorganic materials 0.000 description 1
- 230000003239 periodontal effect Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
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- 238000005488 sandblasting Methods 0.000 description 1
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C8/00—Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereon; Dental implants; Implanting tools
- A61C8/0018—Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereon; Dental implants; Implanting tools characterised by the shape
- A61C8/0037—Details of the shape
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C13/00—Dental prostheses; Making same
- A61C13/08—Artificial teeth; Making same
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C8/00—Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereon; Dental implants; Implanting tools
- A61C8/0018—Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereon; Dental implants; Implanting tools characterised by the shape
- A61C8/0037—Details of the shape
- A61C2008/0046—Textured surface, e.g. roughness, microstructure
Abstract
The present invention provides a dental implant and a method for manufacturing the same, the dental implant including: a dental implant body, a porous layer being provided outside the dental implant body; the porous layer comprises at least one hollow polyhedral structure, and the surface of the hollow polyhedral structure is provided with micropores communicated with the hollow cavity of the hollow polyhedron. The dental implant solves the problems of slow healing speed, easy falling off of the dental implant and easy implantation failure caused by overlarge elastic modulus of the surface and bone tissues of the dental implant in the prior art. According to the manufacturing method of the dental implant, the dental implant is manufactured by 3D printing, so that the processing precision and the product stability are ensured, the processing cost is greatly reduced, the step of surface roughness treatment in the prior art is avoided, and the mechanical property of the dental implant is prevented from being influenced in the processing process.
Description
Technical Field
The invention relates to the technical field of oral implantation, in particular to a dental implant and a manufacturing method thereof.
Background
Tooth loss can cause chewing difficulties, increase the burden of the digestive tract and even harm the health of periodontal tissues, and can also lose support for the soft tissues of the jaw and face, thus being unfavorable for pronunciation and beauty. With the rapid development of modern oral medical technology, artificial tooth implantation has become an important means for repairing missing teeth. With the rapid development of implant technology, dental implants are widely used in the field of dental restoration to compensate for missing teeth.
In order to ensure that the dental implant has enough strength and osseointegration capability, the implant is made of stainless steel or titanium alloy, so that the dental implant has good biocompatibility, mechanical property and corrosion resistance. However, stainless steel metal and titanium alloy are biologically inert and are difficult to rapidly form good osseous bond with bone tissue, so that the problems of long healing period and low bonding strength after implantation and even implantation failure may occur.
At present, the surface roughness of the implant is increased by processing the surface of the implant, so that the problems that the healing period is prolonged, the bonding strength is low and even the implant fails to be planted easily after the implant made of stainless steel and titanium alloy is planted in the prior art are solved. In the prior art, the surface roughness of the implant is usually treated by a coating technology, a sand blasting and acid etching treatment technology, a laser acid etching treatment technology and a chemical acid etching treatment technology, so as to increase the porous structure of the surface of the implant, and further improve the technical effect of improving the surface activity of the implant. However, when the rough surface is prepared by the above treatment method, the implant is easily micro-cracked, which causes stress concentration and reduces the wear resistance and fatigue resistance of the material.
Disclosure of Invention
In view of the drawbacks of the prior art, it is an object of the present invention to provide a dental implant and a method for manufacturing the same.
In a first aspect, the present invention provides a dental implant comprising: a dental implant body, a porous layer being provided outside the dental implant body; the porous layer comprises at least one hollow polyhedral structure, and the surface of the hollow polyhedral structure is provided with micropores communicated with the hollow cavity of the hollow polyhedron.
According to the invention, the porous layer structure is arranged to replace the rough surface preparation in the prior art, so that the mechanical property of the dental implant is prevented from being influenced, and the strength and the osseointegration efficiency of the implant are greatly improved.
In a preferred embodiment of the invention, the porous layer comprises a plurality of hollow polyhedral structures, which are distributed in succession along the circumference of the dental implant body.
In a preferred embodiment of the present invention, the dental implant body is externally provided with an insertion groove adapted to the hollow polyhedral structure, and the hollow polyhedral structure is provided in the insertion groove.
In a preferred embodiment of the invention, the porous layer is provided in a plurality, which are distributed in succession along the axial direction of the dental implant body.
In a preferred embodiment of the invention, the thickness of the porous layer is equal to the depth of the caulking groove;
when the dental implant is implanted into an alveolar bone, the thickness of the porous layer on the dental implant body corresponding to the cortical bone region is 0.4mm, and the thickness of the porous layer on the dental implant body corresponding to the cancellous bone region is 0.6 mm.
In the prior art, the elastic modulus of the dental implant made of stainless steel and titanium alloy is fixed and unchanged, and the elastic modulus of the stainless steel and the titanium alloy is far higher than that of human alveolar bone tissue, so that a stress shielding effect can be generated, and the combination of the implant and the bone tissue is not facilitated. The invention adjusts the elastic modulus and the mechanical property of the dental implant by adjusting the thickness of the porous layer, and simultaneously improves the combining capacity of the implant and the bone tissue. Because the porosity of the cortical bone area is smaller than that of the cancellous bone area, and the elastic modulus of the cortical bone area is larger than that of the cancellous bone area, the elastic modulus of different areas on the dental implant is matched with the elastic modulus of the bone tissue by controlling the thickness of the porous layer corresponding to the cortical bone area and the thickness of the porous layer corresponding to the cancellous bone area, and the stress shielding effect is avoided.
In a preferred embodiment of the present invention, the hollow polyhedral structure is composed of four vertically arranged pillars, a beam and a longitudinal beam connecting two ends of two adjacent pillars, a hollow hexahedron is formed among the pillars, the beam and the longitudinal beam, and each surface of the hollow hexahedron is formed with the micro-holes communicated with the hollow cavity of the hollow hexahedron.
In a preferred embodiment of the present invention, the micro-holes of the hollow hexahedron on one surface of the caulking groove opening are square micro-holes, and the side length of each square micro-hole is 300 to 600 um.
In a preferred embodiment of the present invention, the side length of the square micro-hole is 450 um.
In a preferred embodiment of the present invention, the hollow cavity of the hollow hexahedron includes eight inner corners, and two inner corners of the hollow cavity of the hollow hexahedron that are centrosymmetric are connected by a support column.
In a preferred embodiment of the present invention, the dental implant body includes an implant and a base, the implant has an outer surface formed with a first external thread, the implant has an upper end formed with an accommodating space, the base is mounted in the accommodating space and has a connecting hole, and the therapeutic cap is in threaded connection with the connecting hole.
In a preferred embodiment of the invention, the external diameter of the first external thread is 4.1mm, the internal diameter of the first external thread is 3.3mm, the pitch of the first external thread is 1.25mm, and the thread angle of the first external thread is 15 °.
In a preferred embodiment of the present invention, the abutment and the implant are integrally formed.
In a preferred embodiment of the present invention, the connecting hole includes a first counterbore, a screw hole located below the first counterbore and communicated with the first counterbore, and a second counterbore located below the screw hole and communicated with the screw hole;
the screw hole is internally provided with an internal thread, and the treatment cap is provided with a second external thread matched with the internal thread.
In a preferred embodiment of the present invention, the bottom of the implant is provided with a round corner. Through setting up the fillet, make things convenient for dental implant to implant, avoid cutting human tissue.
The invention provides a manufacturing method of a dental implant, which is used for manufacturing the dental implant and comprises the following steps:
s1: using a DICOM modeling method, shooting the toothless mandible by utilizing a CT technology, and obtaining CT data corresponding to the toothless mandible, thereby establishing a first three-dimensional finite element model containing the toothless mandible, mucosa and false teeth by utilizing medical image software Minics, reverse engineering software Geomagic and three-dimensional design software SolidWorks;
s2: establishing parts of a three-dimensional model of the dental implant in SolidWorks through a dental implant drawing, and assembling to form a second three-dimensional finite element model of the dental implant;
s3: assembling the first three-dimensional finite element model in the step S1 and the second three-dimensional finite element model in the step S2 to obtain a required third three-dimensional finite element model;
s4: performing finite element analysis on the dental implant by using ANSYS, adding material attributes to the third three-dimensional finite element model respectively, adding different loads to simulate different actual conditions, calculating and analyzing the biomechanical performance of the implant, analyzing corresponding results of the dental implant, and adjusting various parameters of the implant according to the simulation results of the finite element analysis so that the dental implant meets the required strength requirement;
s5: and printing a finished product of the dental implant by using a selective laser melting 3D printing technology, and processing, cleaning and disinfecting the finished product of the dental implant.
Compared with the prior art, the invention has the following beneficial effects:
1. the dental implant solves the problems of slow healing speed, easy falling off of the dental implant and easy implantation failure caused by overlarge elastic modulus of the surface of the dental implant and bone tissues in the prior art; the porous layer is arranged on the outer surface of the dental implant body to replace a rough surface in the prior art, so that the mechanical strength and the osseointegration efficiency of the dental implant are greatly improved under the condition of the same pore space; the thickness of the porous layer corresponding to the positions of the cancellous bone area and the cortical bone area is adjusted to optimize the elastic modulus of the dental implant, so that different parts of the dental implant are respectively matched with the elastic modulus of the corresponding bone tissues, and the stress shielding effect is reduced, thereby improving the osseointegration performance of the dental implant and further improving the implantation success rate of the dental implant.
2. According to the manufacturing method of the dental implant, the dental implant is manufactured by 3D printing, so that the processing precision and the product stability are ensured, the processing cost is greatly reduced, the step of surface roughness treatment in the prior art is avoided, and the mechanical property of the dental implant is prevented from being influenced in the processing process.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
FIG. 1 is a perspective view of a dental implant according to the present invention;
FIG. 2 is a front view of FIG. 1;
FIG. 3 is a cross-sectional view taken along the line A-A in FIG. 1;
FIG. 4 is a schematic structural view of a hollow polyhedral structure;
fig. 5 is a top view of fig. 4.
The correspondence between each mark and the part name is as follows: the porous layer 1, the hollow polyhedron structure 2, the upright column 3, the cross beam 4, the longitudinal beam 5, the square micropore 6, the supporting column 7, the implant 8, the base station 9, the first external thread 10, the first countersunk hole 11, the screw hole 12, the second countersunk hole 13, the internal thread 14 and the fillet 15.
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that it would be obvious to those skilled in the art that various changes and modifications can be made without departing from the spirit of the invention. All falling within the scope of the present invention.
Example 1
Referring to fig. 1 to 5, the present embodiment provides a dental implant, including: the dental implant comprises a dental implant body, wherein a porous layer 1 is arranged outside the dental implant body; the porous layer 1 comprises at least one hollow polyhedral structure 2, and the surface of the hollow polyhedral structure 2 is provided with micropores communicated with the hollow cavity of the hollow polyhedron. Referring to fig. 4 and 5, the porous layer 1 of the present invention is composed of a hollow polyhedron 2 having micropores on the surface thereof, and the strength and osseointegration efficiency of the dental implant are greatly improved by providing the porous layer 1 structure instead of the prior art rough surface.
Specifically, referring to fig. 1 to 3, the porous layer 1 in the present embodiment includes a plurality of hollow polyhedral structures 2, and the plurality of hollow polyhedral structures 2 are sequentially distributed along the circumferential direction of the dental implant body.
Specifically, referring to fig. 3, the dental implant of the present embodiment is provided with an insertion groove outside the body to be fitted with the hollow polyhedral structure 2, and the hollow polyhedral structure 2 is provided in the insertion groove, wherein one face of the hollow polyhedral structure 2 is located at the opening of the insertion groove.
Specifically, referring to fig. 1 to 3, the porous layer 1 in the present embodiment is provided in plural, and the plural porous layers 1 are sequentially distributed along the axial direction of the dental implant body.
Wherein the thickness of the porous layer 1 is equal to the depth of the caulking groove; when the dental implant 8 is implanted into the alveolar bone, the thickness of the porous layer 1 on the dental implant body corresponding to the cortical bone region is 0.4mm, and the thickness of the porous layer 1 on the dental implant body corresponding to the cancellous bone region is 0.6 mm.
In the prior art, the elastic modulus of the dental implant made of stainless steel and titanium alloy is fixed and unchanged, and the elastic modulus of the stainless steel and the titanium alloy is far higher than that of human alveolar bone tissue, so that a stress shielding effect can be generated, and the combination of the implant 8 and the bone tissue is not facilitated. In the invention, the elastic modulus and the mechanical property of the dental implant are adjusted by adjusting the thickness of the porous layer 1, and the combining capacity of the implant 8 and the bone tissue is improved. The elastic modulus of the dental implant of the present invention can be achieved by adjusting the thickness of the porous layer 1. Because the porosity of the cortical bone area is smaller than that of the cancellous bone area, and the elastic modulus of the cortical bone area is larger than that of the cancellous bone area, the thickness of the porous layer 1 corresponding to the cortical bone area and the thickness of the porous layer 1 corresponding to the cancellous bone area are controlled, so that the implant 8 positioned in the cortical bone area can be well combined with cortical bone tissue, and the implant 8 positioned in the cancellous bone area can be well combined with cancellous bone tissue, namely, the elastic modulus of the dental implant 8 is adjusted and optimized by adjusting the thickness of the porous layer 1, the stress shielding effect is greatly reduced, the bone combining capacity of the dental implant is improved, and the success rate of implantation is effectively improved.
Specifically, referring to fig. 4 and 5, the hollow polyhedron structure 2 in the present embodiment is composed of four vertically arranged columns 3, beams 4 and longitudinal beams 5 connecting two ends of two adjacent columns 3, a hollow hexahedron is formed among the columns 3, the beams 4 and the longitudinal beams 5, and each surface of the hollow hexahedron is formed with micropores communicating with an inner cavity of the hollow hexahedron.
Specifically, referring to fig. 4 and 5, the hollow cavity of the hollow hexahedron in the present embodiment includes eight inner corners, and two inner corners of the hollow cavity of the hollow hexahedron that are centrosymmetric are connected by the support column 7. Wherein, support column 7 is provided with four, and the width of support column 7 in this embodiment is 75 um.
Referring to fig. 4, the micropores on the surface of the hollow hexahedron at the caulking groove opening are square micropores 6. The side length of the square micro-orifice 6 is 300-600 um, namely, the aperture of the pore on the porous layer 1 is 300-600 um; for the optimum aperture scope that the bone grows into when the aperture of square micropore 6 is 300 ~ 600um, increased the acute angle quantity in the fretwork polyhedron 2 through support column 7, be favorable to the bone initial stage to grow. Preferably, the side length of the square micro-holes 6 in the present embodiment is 450 um.
Specifically, referring to fig. 3, the dental implant body in this embodiment includes an implant 8 and an abutment 9, a first external thread 10 is formed on an outer surface of the implant 8, an accommodating space is formed at an upper end of the implant 8, a lower end of the abutment 9 is installed in the accommodating space, a connection hole is formed in the abutment 9, and the treatment cap is in threaded connection with the connection hole.
In the present embodiment, the abutment 9 and the implant 8 are integrally formed. Wherein, the base 9 is used for supporting, and the taper of the base 9 is 6-7 ° and the height is 1mm in this embodiment.
In this embodiment, the implant 8 and the abutment 9 are made of Ti6a 14V.
Specifically, referring to fig. 3, the connection holes in the present embodiment include a first counterbore 11, a screw hole 12 located below the first counterbore 11 and communicating with the first counterbore 11, and a second counterbore 13 located below the screw hole 12 and communicating with the screw hole 12; the depth of the screw hole 12 is 2.5mm, an internal thread 14 is arranged in the screw hole 12, the internal thread 14 is an M2 x 0.4 thread, and a second external thread matched with the internal thread 14 is arranged on the therapeutic cap; wherein, the conicity of the first counter sink 11 is 30 degrees, the conicity of the second counter sink 13 is 120 degrees; through setting up first counter sink 11 in making things convenient for better wrong income screw 12 of treatment cap, through setting up second counter sink 13, make things convenient for better the installing in the connecting hole of treatment cap.
Wherein, the external diameter of first external screw thread 10 is 4.1mm, and the internal diameter of first external screw thread 10 is 3.3mm, and the pitch of first external screw thread 10 is 1.25mm, and the screw thread angle of first external screw thread 10 is 15.
Wherein, the shortest straight-line distance between one end of the first external thread 10 close to the bottom of the implant 8 and the bottom of the implant 8 is 2 mm.
In addition, referring to fig. 3, the bottom of the implant 8 in this embodiment is provided with a rounded corner 15. Wherein, the radius of this fillet 15 is 2mm, through setting up fillet 15, makes things convenient for dental implant 8 to implant, avoids cutting human tissue.
The hollow polyhedral structure 2 in the embodiment has good strength and toughness through finite element analysis, and has the effects of reducing the elastic modulus of the implant body and relieving the stress shielding effect when being arranged on the outer wall of the implant body.
In conclusion, the dental implant provided by the invention has the advantages that the porous layer 1 is arranged on the outer surface of the dental implant body to replace a rough surface in the prior art, so that the mechanical strength and the osseointegration efficiency of the dental implant are greatly improved under the condition of the same pores; the elastic modulus of the dental implant is optimized by adjusting the thickness of the porous layer 1 corresponding to the positions of the cancellous bone area and the cortical bone area, so that different parts of the dental implant are respectively matched with the elastic modulus of corresponding bone tissues, and the stress shielding effect is reduced, thereby improving the osseointegration performance of the dental implant and further improving the implantation success rate of the dental implant. Solves the problems of slow healing speed, easy falling off of the dental implant and easy implantation failure caused by overlarge elastic modulus of the surface of the dental implant and bone tissues in the prior art.
The dental implant has high success rate of dental implantation, can greatly shorten the implantation period, and has high speed of combining the dental implant with bone tissues and strong combining performance.
Example 2
The embodiment provides a method for manufacturing a dental implant, which is used for manufacturing the dental implant in embodiment 1, and specifically comprises the following steps:
s1: using a DICOM modeling method, shooting the toothless mandible by utilizing a CT technology, and obtaining CT data corresponding to the toothless mandible, thereby establishing a first three-dimensional finite element model containing the toothless mandible, mucosa and false teeth by utilizing medical image software Minics, reverse engineering software Geomagic and three-dimensional design software SolidWorks;
s2: establishing parts of a three-dimensional model of the dental implant in SolidWorks through a dental implant drawing, and assembling to form a second three-dimensional finite element model of the dental implant;
s3: assembling the first three-dimensional finite element model in the step S1 and the second three-dimensional finite element model in the step S2 to obtain a required third three-dimensional finite element model;
s4: performing finite element analysis on the dental implant by using ANSYS, adding material attributes to the third three-dimensional finite element model respectively, adding different loads to simulate different actual conditions, calculating and analyzing the biomechanical property of the implant, analyzing corresponding results of the dental implant, and adjusting various parameters of the implant according to the simulation result of the finite element analysis so that the dental implant meets the required strength requirement;
s5: and printing a finished product of the dental implant by using a selective laser melting 3D printing technology, and processing, cleaning and disinfecting the finished product of the dental implant.
In step S2, when the second three-dimensional finite element model is established, the external threads on the implant body and the porous layer 1 are not established in sequence, and those skilled in the art can reasonably select the two according to the conventional technical means in the art.
According to the manufacturing method of the dental implant, the dental implant is manufactured through 3D printing, the processing precision and the product stability are guaranteed, the processing cost is greatly reduced, the step of surface roughness treatment in the prior art is avoided, and the mechanical property of the dental implant is prevented from being influenced in the processing process.
The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.
Claims (15)
1. A dental implant, comprising: a dental implant body, a porous layer being provided outside the dental implant body; the porous layer comprises at least one hollow polyhedral structure, and the surface of the hollow polyhedral structure is provided with micropores communicated with the hollow cavity of the hollow polyhedron.
2. The dental implant of claim 1, wherein the porous layer comprises a plurality of hollow polyhedral structures distributed in series circumferentially along the dental implant body.
3. A dental implant according to claim 1, characterised in that the dental implant body is provided externally with an inlay groove adapted to the hollow polyhedral structure, the hollow polyhedral structure being provided within the inlay groove.
4. The dental implant of claim 3, wherein the porous layer is provided in a plurality, the plurality of porous layers being distributed sequentially along the axial direction of the dental implant body.
5. The dental implant of claim 4, wherein the porous layer has a thickness equal to the depth of the impression;
when the dental implant is implanted into an alveolar bone, the thickness of the porous layer on the dental implant body corresponding to the cortical bone region is 0.4mm, and the thickness of the porous layer on the dental implant body corresponding to the cancellous bone region is 0.6 mm.
6. The dental implant of claim 3, wherein the hollow polyhedral structure is composed of four vertically arranged columns, a beam and a longitudinal beam connecting two adjacent columns, the beam and the longitudinal beam form a hollow hexahedron therebetween, and each face of the hollow hexahedron is formed with the micro holes communicated with the hollow cavity of the hollow hexahedron.
7. The dental implant of claim 6, wherein the micro-holes on one side of the hollow hexahedron at the opening of the caulking groove are square micro-holes, and the side length of each square micro-hole is 300-600 um.
8. The dental implant of claim 7, wherein the square micro-hole has a side length of 450 um.
9. The dental implant of claim 6, wherein the hollow cavity of the hollow hexahedron comprises eight inner corners, and two of the inner corners in the hollow cavity of the hollow hexahedron which are centrosymmetric are connected through a support column.
10. The dental implant of claim 1, wherein the dental implant body comprises an implant body and an abutment, the outer surface of the implant body is formed with a first external thread, the upper end of the implant body is formed with a receiving space, the lower end of the abutment is mounted in the receiving space, the abutment is formed with a connecting hole, and the treatment cap is in threaded connection with the connecting hole.
11. The dental implant of claim 10, wherein the first external thread has an outer diameter of 4.1mm, an inner diameter of 3.3mm, a pitch of 1.25mm, and a thread angle of 15 °.
12. The dental implant of claim 10, wherein the abutment is a unitary structure with the implant.
13. The dental implant of claim 10, wherein the connection hole comprises a first counter bore, a threaded hole below and in communication with the first counter bore, a second counter bore below and in communication with the threaded hole;
the screw hole is internally provided with an internal thread, and the treatment cap is provided with a second external thread matched with the internal thread.
14. The dental implant of claim 10, wherein the bottom of the implant is rounded.
15. A method for manufacturing a dental implant according to any one of claims 1 to 14, comprising the steps of:
s1: using a DICOM modeling method, shooting the toothless mandible by utilizing a CT technology, and obtaining CT data corresponding to the toothless mandible, thereby establishing a first three-dimensional finite element model containing the toothless mandible, mucosa and false teeth by utilizing medical image software Minics, reverse engineering software Geomagic and three-dimensional design software SolidWorks;
s2: establishing parts of a three-dimensional model of the dental implant in SolidWorks through a dental implant drawing, and assembling to form a second three-dimensional finite element model of the dental implant;
s3: assembling the first three-dimensional finite element model in the step S1 and the second three-dimensional finite element model in the step S2 to obtain a required third three-dimensional finite element model;
s4: performing finite element analysis on the dental implant by using ANSYS, adding material attributes to the third three-dimensional finite element model respectively, adding different loads to simulate different actual conditions, calculating and analyzing the biomechanical performance of the implant, analyzing corresponding results of the dental implant, and adjusting various parameters of the implant according to the simulation results of the finite element analysis so that the dental implant meets the required strength requirement;
s5: and printing a finished product of the dental implant by using a selective laser melting 3D printing technology, and processing, cleaning and disinfecting the finished product of the dental implant.
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| CN202110581613.9A CN113303935A (en) | 2021-05-26 | 2021-05-26 | Dental implant and manufacturing method thereof |
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| CN202110581613.9A CN113303935A (en) | 2021-05-26 | 2021-05-26 | Dental implant and manufacturing method thereof |
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| CN113303935A true CN113303935A (en) | 2021-08-27 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115381570A (en) * | 2022-08-30 | 2022-11-25 | 江苏万疆高科技有限公司 | Truss structure-based 3D printing porous implant and manufacturing method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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