CN208989195U - A kind of gradient porous personalized tooth-implanting of NiTi memorial alloy - Google Patents
A kind of gradient porous personalized tooth-implanting of NiTi memorial alloy Download PDFInfo
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- CN208989195U CN208989195U CN201820343845.4U CN201820343845U CN208989195U CN 208989195 U CN208989195 U CN 208989195U CN 201820343845 U CN201820343845 U CN 201820343845U CN 208989195 U CN208989195 U CN 208989195U
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Abstract
The utility model discloses a kind of gradient porous personalized tooth-implantings of NiTi memorial alloy, corona part and root of the tooth part are separated using cutting plane, base station is designed according to required retention at the top of tooth-implanting root of the tooth, root of the tooth bottom is dispersed with gradient porous structure, root of the tooth uses the NiTi memorial alloy 3D printing with memory effect to manufacture, and has memory effect after trained.Root of the tooth undergoes phase transition under body temperature phase transformation temperature points and is deformed, and base station and root of the tooth bottom implant part have self-expanding effect, it can be achieved that root of the tooth is full of gum and automatically with pretightning force at the top of root of the tooth.The transversely deforming difference that tooth-implanting arrangement BCC porous structure and negative poisson's ratio porous structure are generated due to two kinds of structures in phase transformation, tooth-implanting body bottom generates discontinuous deformation, forms class helicitic texture, increases contact area, and fixed function is played, make tooth-implanting be not susceptible to loosen.
Description
Technical field
The utility model belongs to the technical field of tooth-implanting, is related to a kind of gradient porous personalized plantation of NiTi memorial alloy
Tooth.
Background technique
So-called 4D printing technique, exactly joined " time " element in the concept of traditional 3D printing, can by printing objects
Self adjustment to occur over time and morphologically.This technology is even without printer device, so that it may directly
It allows material rapid shaping, can be rated as revolutionary technology.4D printing technique will can be applied to furniture, bicycle, automobile and even cure
Treatment field.
NiTi memorial alloy is since with shape memory effect and superlastic sexual behaviour, in biologic medical, aerospace is intelligent
Robot etc. is widely used.There is the NiTi memorial alloy of memory effect to plant thread form for selective melting 3D printing
At a kind of novel 4D tooth-implanting technology.
NiTi memorial alloy is since with shape memory effect and superlastic sexual behaviour, in biologic medical, aerospace is intelligent
Robot etc. is widely used.The screw thread implantation of traditional general selection standard of tooth-implanting, implant are
Standardized metal parts, either surface texture shape all have very big difference, spiral shell with natural root of the tooth on still forming
The implantation of nail type can cause very big extruding force, and the smooth quick increasing for being unfavorable for osteocyte in surface to dentale slot tissue
It is long, it will lead to dentale slot atrophy when serious.And with porous structure NiTi memorial alloy mechanical property and elasticity modulus with
Human body hard tissue increases the surface area of material, the hole of connection has more closely, porous structure reduces the density of material
The function of similar capillary, the porous NiTi memorial alloy after implantation can be absorbed from ambient enviroment body fluid and for osteocyte with
Growing into for blood vessel provides necessary space, convenient for combining closely for porous implant and bone tissue.It is closed since NiTi remembers
Super elastic characteristics possessed by gold itself can produce restoring force after receiving pressure effect deformation, conducive to the transmitting of bone tissue power, thorn
Swash the growth of surrounding bone.Therefore, using porous NiTi memorial alloy as the hard tissue repairs body such as joint implant and tooth-implanting
With huge medical application potentiality.
However, uniform porous structure can not match the mechanical requirements of tooth-implanting, the sclerotin of tooth is all that gradient aperture is presented
Distribution, be conducive to the transmitting and energy absorption of power.Negative poisson's ratio structure refers to that when subjected to tension, structure is in elastic range
When being under pressure, cross-direction shrinkage occurs for interior generation lateral expansion.Since this special construction determines it with good energy
Absorbent properties.The utility model proposes a kind of design sides with gradient negative poisson's ratio porous structure NiTi memorial alloy tooth-implanting
Method, the design for personalized tooth-implanting provide reference.
Utility model content
The shortcomings that the main purpose of the utility model is to overcome the prior arts and deficiency, provide a kind of NiTi memorial alloy
Gradient porous personalization tooth-implanting.
In order to achieve the above object, the utility model uses following technical scheme:
A kind of gradient porous personalized tooth-implanting of NiTi memorial alloy of the utility model, including root of the tooth and corona, in root of the tooth
After plantation healing, the root of the tooth of corona and boss with concave and convex platform is fixed using conventional adhesive mode, root of the tooth is integration 3D
Printing-forming is equipped with the base station of 8 ° of -10 ° of gradients at the top of root of the tooth according to required retention, and the bottom of base station is with root of the tooth
The closed curve that top edge closure curve interior biasing 1mm is obtained, the bottom of the corona offers and the matched boss of base station；
The root of the tooth bottom is dispersed with gradient porous structure, and root of the tooth uses the NiTi memorial alloy 3D printing system with memory effect
It makes.
The gradient porous structure is continuous gradient negative poisson's ratio porous structure or discontinuous as a preferred technical solution,
Gradient negative poisson's ratio porous structure.
The gradient of the base station is 9 ° as a preferred technical solution,.
The height of the base station is 3mm as a preferred technical solution,.
The utility model compared with prior art, is had the following advantages and beneficial effects:
1, a kind of personalized gradient negative poisson's ratio porous structure tooth-implanting and its corona of the utility model design, base station
Etc. features, and using selective laser smelting technology preparation have gradient negative poisson's ratio porous structure tooth-implanting, rebuild stinging for tooth
It closes function and improves the biocompatibility of tooth-implanting.
2, on the one hand springform is further decreased by gradient porous realization using the tooth-implanting of gradient negative poisson's ratio structure
Amount realizes matching, on the other hand increases the surface area of material, and cell is promoted to grow into, and improves bond strength, while memory effect
After being implanted into, root of the tooth initial configuration is small, is conducive to surgical and installs, is become larger stretching tooth position using material memory effect, simultaneously
Because elastic properties of materials forms lasting pretightning force, dentale slot atrophy is prevented.
Detailed description of the invention
The porous tooth-implanting design flow diagram of Fig. 1 personalization gradient negative poisson's ratio；
Fig. 2 is that the CT data of the utility model are extracted, and treated suffers from tooth schematic diagram；
Fig. 3 is the entity root of the tooth and the first schematic diagram of design for tooth crown of the tooth-implanting of the utility model；
Fig. 4 is the entity root of the tooth and the second schematic diagram of design for tooth crown of the tooth-implanting of the utility model；
Fig. 5 is the porous tooth-implanting design diagram of continuous gradient negative poisson's ratio of the utility model；
Fig. 6 is that the porous tooth-implanting of discontinuous gradient negative poisson's ratio of the utility model designs the first schematic diagram；
Fig. 7 is that the porous tooth-implanting of discontinuous gradient negative poisson's ratio of the utility model designs the second schematic diagram.
Specific embodiment
The present invention will be further described in detail with reference to the embodiments and the accompanying drawings, but the implementation of the utility model
Mode is without being limited thereto.
Embodiment
As shown in Figure 1, the gradient porous personalized tooth-implanting of the present embodiment NiTi memorial alloy and design method, including it is following
Step:
Using the medical image data of CT scanner acquisition oral cavity upper jaw patient part, the data of DICOM format are obtained.It will
DICOM format file imports inside Mimics software, according to threshold trait, edits inside two dimension editor to image.By
It is very close in the image threshold value of root of the tooth and the image threshold value of alveolar bone, it needs to carry out its image according to the feature of root of the tooth detailed
Editor deletes the image of non-root of the tooth, realizes the consecutive variations on root of the tooth boundary.After fine editor, 2-D data is converted to three
Dimension data, and export the stl formatted file for suffering from tooth.
Tooth stl formatted file will be suffered to be directed into Geomagic studio software, grid is carried out to the dental cast of suffering from of acquisition
Adjustment, deletes extra Sharp features, and be smoothed, to remove unwanted relief feature.Carry out precise curved surface
Fitting is layouted principle using quadrangle, obtains fitting effect and preferably suffer from tooth stl model, as shown in Figure 2.
Tooth stl model of suffering from after precise curved surface is fitted is directed into Rhinoceros software, carry out it is reverse rebuild with just
To design.According to the interface that tooth socket in image is separated with corona, one is established using z-axis as the plane of normal direction, utilizes the plane
Corona part and root of the tooth part are separated, obtain root of the tooth 3 and corona 1, as shown in Figure 3.According to required solid at the top of root of the tooth
Position power design has the base station 2 of 8 ° of gradient.The bottom of the base station is obtained with root of the tooth top edge closure curve interior biasing 1mm
The closed curve obtained, then establishes a plane on the basis of closed curve, establishes 3mm high using operation is squeezed out, gradient is
8 ° of base station 2, as shown in Figure 3.And corona part is subtracted into corresponding base station volume using boolean operation method, obtaining has
With preferable corona 4 is spent, as shown in Figure 4.
According to its biocompatibility requirement and stress condition, using Rhinoceros plug-in unit grasshopper according to tooth
Root shape designs continuous gradient negative poisson's ratio porous structure tooth-implanting.Root of the tooth design space is picked up with Brep battery, by Brep
It is connected in Uniform DS battery, the design space as gradient porous structure.Had according to Topology Optimization Theory design negative
The cell cube of Poisson's ratio structure.The topology information of cell cube is input in Uniform DS battery, the size of setting unit body,
By the struts information input of Uniform DS into Heterogen Gradient battery.In Heterogen Gradient electricity
Gradient function is set in pond, the change direction and variation degree of gradient are configured, wherein the truss diameter of porous structure
Size is carried out the gradual change of gradient by 0.16mm to 0.32mm.It concentrates, utilizes to reduce the stress of structure wedge angle generation
Weaverbird ' s LoopSubdivision battery carries out round and smooth processing, round and smooth iteration order setting to gradient porous structure
For 2 ranks.Finally and gradient porous structure is output in Rhinoceros window using bake function, completes to have gradient porous
The design of tooth-implanting, as shown in Figure 5.
It is different according to the Poisson's ratio of different porous structures, using Rhinoceros plug-in unit grasshopper according to dental root shaped
Shape designs discontinuous gradient negative poisson's ratio porous structure.Root of the tooth is divided into seven parts with multiple z-axis normal direction cutting planes, is used
Brep battery picks up different design spaces respectively, and Brep is connected in UniformDS battery, as setting for porous structure
Count space.The cell cube with negative poisson's ratio structure and the cell cube with BCC structure are designed according to Topology Optimization Theory.By two
The topology information of seed type cell cube is separately input into Uniform DS battery, the size of setting unit body, by Uniform
The struts information input of DS is into Heterogen battery.It is 0.18mm that struts diameter is arranged in Heterogen battery.
It is concentrated to reduce the stress of structure wedge angle generation, utilizes Weaverbird ' s Loop Subdivision battery to porous knot
Structure carries out round and smooth processing, and round and smooth iteration order is set as 2 ranks.Finally and porous structure is output to using bake function
In Rhinoceros window.After carrying out seven aforesaid operations, BCC- negative poisson's ratio interval is separately won to obtain in seven tooth roots respectively
Gradient porous structure completes the design with the porous tooth-implanting of discontinuous gradient, as shown in Figure 6.By the discontinuous gradient in Fig. 6
It,, should by squeezing compression mode using surgical implant into patient's tooth socket after porous tooth-implanting is formed by metal 3D printing
Discontinuous gradient porous structure deforms, as shown in Figure 7.It is compression that the discontinuity of the deformation, which is due to BCC porous structure,
The structure of the positive Poisson's ratio of lateral expansion, and another negative poisson's ratio structure is the structure of compression cross-direction shrinkage, due to above-mentioned
Characteristic occurs discontinuous deformation when compressing root of the tooth and forms the locking mechanism of class screw thread, to play fixed effect.
In the utility model production method using similar process design, have continuous gradient negative poisson's ratio porous structure and
The tooth-implanting of discontinuous gradient negative poisson's ratio structure belongs to the range of the utility model protection.Therefore, the utility model and unlimited
In specific embodiment disclosed herein, and including all embodiments for dropping into claims.
Claims (4)
1. a kind of gradient porous personalized tooth-implanting of NiTi memorial alloy, which is characterized in that including root of the tooth and corona, in root of the tooth kind
After planting healing, the root of the tooth of corona and boss with concave and convex platform is fixed using conventional adhesive mode, root of the tooth is that integration 3D is beaten
It is printed as shape, is equipped with the base station of 8 ° of -10 ° of gradients according to required retention at the top of root of the tooth, the bottom of base station is with root of the tooth top
The closed curve that portion border seal curve interior biasing 1mm is obtained, the bottom of the corona offers and the matched boss of base station；Institute
It states root of the tooth bottom and is dispersed with gradient porous structure, and root of the tooth uses the NiTi memorial alloy 3D printing with memory effect to manufacture.
2. the gradient porous personalized tooth-implanting of a kind of NiTi memorial alloy according to claim 1, which is characterized in that the ladder
Spending porous structure is continuous gradient negative poisson's ratio porous structure or discontinuous gradient negative poisson's ratio porous structure.
3. the gradient porous personalized tooth-implanting of a kind of NiTi memorial alloy according to claim 1, which is characterized in that the base
The gradient of platform is 9 °.
4. the gradient porous personalized tooth-implanting of a kind of NiTi memorial alloy according to claim 1, which is characterized in that the base
The height of platform is 3mm.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114176807A (en) * | 2021-12-08 | 2022-03-15 | 北京航空航天大学 | Multifunctional micro-implant anchorage nail and design and manufacturing method thereof |
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2018
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114176807A (en) * | 2021-12-08 | 2022-03-15 | 北京航空航天大学 | Multifunctional micro-implant anchorage nail and design and manufacturing method thereof |
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