Summary of the invention
The objective of the invention is to overcome existing tooth implant and the not good defective of alveolar bone bond strength; A kind of novel tooth implant and preparation method thereof is provided; Be fit to the loose structure that bone is grown at the substructure of tooth implant, grow into through bone that to reach tooth implant chimeric firmly with alveolar bone for loose structure, with the bond strength of increase tooth implant and alveolar bone; Improve the effectiveness at a specified future date of tooth implant, promote the success rate of implant operation.
The present invention realizes through following technical scheme:
A kind of tooth implant; It comprises: implantation body's body and cell structure, and this implantation body's body interior is provided with the internal thread hole that is connected with base station, and outer surface is provided with the external screw thread that is connected with alveolar bone; This cell structure is connected in the embedded structure of the bottom of said implantation body body with grow into new bone formation and alveolar bone; Be communicated with fully each other between the hole of said cell structure, and its pore-size is the 300-1000 micron that porosity is 60-90%.
A kind of method for preparing that is used for said tooth implant, it comprises the steps:
The first step; Utilize the said tooth implant structure of known CAD software design; Be communicated with fully each other between the hole of the cell structure of this tooth implant; Its pore-size is the 300-1000 micron, and porosity is 60%-90%, and the CAD design data of said tooth implant is stored as the stl file form;
Second step; The CAD design data of said tooth implant is input to the rapid forming system that is used for controlling the electron beam scanning path; This rapid forming system carries out hierarchy slicing to the CAD design data of said tooth implant to be handled; Obtain the two-dimensional signal data, and carry out the quick shaping manufacturing of said tooth implant;
In the 3rd step, adopt known machining process on implantation body's body of said tooth implant, to make internal thread hole that is connected with base station and the external screw thread that is connected with alveolar bone.
Described known CAD software is Unigraphix, Pro/E or Catia.
The concrete steps of described quick shaping manufacturing are: powder feeding mechanism is delivered to presumptive area with powder body material, and powder mechanism paves powder body and compacting by the shop; Electron beam scans according to the two-dimensional signal data that obtained under computer control then, fusing sintering powder body material; Repeat above-mentioned powder feeding, spread powder and melt agglomerating process, comprise the tooth implant of the integral body of implantation body's body and cell structure until formation; The tooth implant of processing is placed on slowly cooling in the powder body heap in the vacuum chamber, takes out and further be cooled to room temperature then, removes and is stained with the unnecessary powder body that is bonded on the tooth implant.
The technological parameter that described quick shaping is made is following: processing bed thickness 0.1mm, scanning speed 300m/s, beam power 4kW, vacuum 5 * 10
-4MBar.
Described powder body material is titanium, titanium alloy or vitallium.
Cooling in the described vacuum chamber is meant that temperature reduces to 150 ℃.
Compare with existing tooth implant; The novel tooth implant of the present invention's preparation; The loose structure of its bottom is to design and make according to being beneficial to the principle that cell and bone grow into; Thereby can promote the cell structure growth inside of new bone, form the embedded structure of alveolar bone and tooth implant, realize the firm binding of tooth implant and alveolar bone to the tooth implant bottom; In addition; Adopt the part of quick shaping manufacturing technology electron-beam melting preparation, its surface is a rough surface, and rough surface can increase the synosteosis surface area; Thereby further improve the bond strength of tooth implant and alveolar bone, realize that the perfection of tooth implant and alveolar bone links.
The specific embodiment
As shown in Figure 1, tooth implant of the present invention comprises: implantation body's body 1 and cell structure 4.The inside of said implantation body body 1 is provided with internal thread hole 2, and outer surface is provided with external screw thread 3, and this external screw thread 3 is connected with alveolar bone, and this internal thread hole 2 is connected with base station.Said cell structure 4 is connected in the bottom of this implantation body's body 1, and growing into for new bone provides the space; Be communicated with fully each other between the hole of this cell structure 4, and its pore-size is the 300-1000 micron that porosity is 60-90%, its microstructure can be consulted Fig. 2.Said external screw thread 3 is a kind of common mechanical connection with being connected of alveolar bone; Be used to implant the fixing of initial stage tooth implant and alveolar bone; Said cell structure at a specified future date 4 inside have a large amount of new bones to grow in implantation; Thereby form the embedded structure of cell structure 4 and alveolar bone, can obtain the biological fixation of tooth implant and alveolar bone, the clinical bone synergy of realizing ideal.
The method for preparing of novel porous structure tooth implant according to the invention comprises the steps:
The first step is utilized known commercialization CAD software, as: Unigraphix, Pro/E, Catia etc.; Design the overall structure of said tooth implant; And according to helping cell, organize the principle of growing into, the structure of design cell structure 4: connection fully each other between its hole, pore-size is designed to the 300-1000 micron; Designed porosity is 60%-90%, and the CAD design data that described bottom is had a tooth implant of loose structure is stored as the stl file form.
Second step; The cad model design data of above-mentioned tooth implant is input in the rapid forming system; This rapid forming system is mainly used in the scanning pattern of control electron beam; Utilize the Materialise's Magics software in this system that the CAD design data of said tooth implant is carried out the hierarchy slicing processing, obtain the two-dimensional signal data of said tooth implant, and carry out the quick shaping manufacturing of tooth implant;
The concrete steps of described quick shaping manufacturing are: powder feeding mechanism is powder body material, as: titanium and alloy powder thereof, vitallium powder, deliver to presumptive area, powder mechanism paves powder body and compacting by the shop; Electron beam scans according to the two-dimensional signal data that obtained under computer control then, fusing sintering powder body material; Repeat the process of above-mentioned powder feeding, shop powder and fusing sintering powder body afterwards, comprise the tooth implant of the integral body of implantation body's body 1 and cell structure 4 until formation; The tooth implant of processing is placed on slowly cooling in the powder body heap in the vacuum chamber, and temperature is reduced to 150 ℃, takes out and further be cooled to room temperature then, removes and is stained with the unnecessary powder body that is bonded on the tooth implant.
The basic technology parameter that said quick shaping is made is following: processing bed thickness 0.1mm, and scanning speed 300m/s, beam power 4kW, vacuum is 5 * 10
-4MBar.
The 3rd step, adopt known traditional mechanical method for processing, on implantation body's body 1 of said tooth implant, make internal thread hole 2 and external screw thread 3, internal thread hole 2 is used to connect base station, and external screw thread 3 is used for being connected with alveolar bone.
Above-mentioned quick shaping manufacturing technology is existing known a kind of advanced manufacturing technology.Wherein, rapid forming system is a control system, mainly is to be used for that cad data is carried out hierarchy slicing to handle and control the electron beam scanning path.
Below in conjunction with embodiment technical scheme of the present invention is elaborated, embodiment is that prerequisite has provided detailed embodiment and concrete operating process with technical scheme of the present invention, but protection scope of the present invention is not limited only to following embodiment.
Embodiment 1
At first utilize the overall structure of known commercialization CAD software Unigraphix design tooth implant; Then according to helping cell, organizing the basic principle of growing into; At implantation body's tip designs diamond point minor structure cell structure 4, its pore-size is 300 microns, and porosity is 60%; Be communicated with fully each other between the hole, the cell structure CAD design data that is designed is with the stl file format; The STL data are input to rapid forming system, carry out hierarchy slicing and handle, obtain the two-dimensional signal data of tooth implant; Carry out the manufacturing of direct metal quick shaping then, by powder feeding mechanism the Ti metal powder material is delivered to presumptive area, shop powder mechanism paves powder body and compacting; Then, electron beam scans according to the two-dimensional signal data that obtained under computer control, fusing sintering powder body material; And then the process that repeats powder feeding, spreads powder, melts the sintering powder body; Comprise the whole tooth implant test specimen of implantation body's body 1 and cell structure 4 up to formation, the basic technology parameter of manufacture process is following: processing bed thickness 0.1mm, scanning speed 300m/s; Beam power 4kW, vacuum is 5 * 10
– 4MBar.Make good tooth implant and be placed on slowly cooling in the powder body heap in the vacuum chamber; Treat to take out after temperature is reduced to 150 ℃; Further be cooled to remove after the room temperature to be stained with and be bonded on implantation body's body 1 and unnecessary powder body that cell structure 4 is inner, thereby obtain the tooth implant that the bottom has loose structure; At last, utilize the traditional mechanical method for processing, at the implantation body's body 1 inner internal thread hole 2 and external screw thread 3 made of tooth implant, internal thread hole 2 is used to connect base station, and external screw thread 3 is connected with alveolar bone.
Embodiment 2
At first utilize the overall structure of business-like CAD software Pro/E design tooth implant; Then according to helping cell, organizing the basic principle of growing into; At the cell structure 4 of implantation body's bottom design diamond point minor structure, its pore-size is 650 microns, and porosity is 75%; Be communicated with fully each other between the hole, the tooth implant cad model that is designed is with the stl file format; The STL data are input to rapid forming system, carry out hierarchy slicing and handle, obtain the two-dimensional signal data of tooth implant; Directly carry out the manufacturing of metal quick shaping then, by powder feeding mechanism the vitallium powder body material is delivered to presumptive area, shop powder mechanism paves powder body and compacting; Then, electron beam scans according to the two-dimensional signal data that obtained under computer control, fusing sintering powder body material; And then the process that repeats powder feeding, spreads powder, melts the sintering powder body; Up to forming whole tooth implant test specimen, the basic technology parameter of manufacture process is following: processing bed thickness 0.1mm, scanning speed 300m/s; Beam power 4kW, vacuum is 5 * 10
-4MBar.Make good tooth implant and be placed on slowly cooling in the powder body heap in the vacuum chamber; Treat to take out after temperature is reduced to 150 ℃; Further be cooled to remove after the room temperature to be stained with and be bonded on implantation body's body 1 and unnecessary powder body that cell structure 4 is inner, thereby obtain the tooth implant that the bottom has loose structure; At last, utilize the traditional mechanical method for processing, at implantation body's body 1 inner internal thread hole 2 and external screw thread 3 made, internal thread hole 2 is used to connect base station, and external screw thread 3 is connected with alveolar bone.
Embodiment 3
At first utilize the overall structure of commercialization CAD software Catia design tooth implant; Then according to helping cell, organizing the basic principle of growing into; At the cell structure 4 of tooth implant bottom design diamond point minor structure, its pore-size is 1000 microns, and porosity is 90%; Be communicated with fully each other between the hole, the tooth implant CAD design data that is designed is with the stl file format; The STL data are input to rapid forming system, carry out hierarchy slicing and handle, obtain the two-dimensional signal data of tooth implant; Carry out the manufacturing of direct metal quick shaping then, by powder feeding mechanism Ti6Al4V titanium alloy powder body material is delivered to presumptive area, shop powder mechanism paves powder body and compacting; Then, electron beam scans according to the two-dimensional signal data that obtained under computer control, fusing sintering powder body material; And then the process that repeats powder feeding, spreads powder, melts the sintering powder body; Up to forming whole tooth implant test specimen, the basic technology parameter of manufacture process is following: processing bed thickness 0.1mm, scanning speed 300m/s; Beam power 4kW, vacuum is 5 * 10
-4MBar.Make good tooth implant and be placed on slowly cooling in the powder body heap in the vacuum chamber; Treat to take out after temperature is reduced to 150 ℃; Further be cooled to remove after the room temperature to be stained with and be bonded on implantation body's body 1 and unnecessary powder body that cell structure 4 is inner, thereby obtain the tooth implant that the bottom has loose structure; At last, utilize the traditional mechanical method for processing, on implantation body's body 1, make internal thread hole 2 and external screw thread 3, internal thread hole 2 is used to connect base station, and external screw thread 3 is connected with alveolar bone.