CN104905882A - Milling-grinding forming and manufacturing method of dental all ceramic prosthesis - Google Patents
Milling-grinding forming and manufacturing method of dental all ceramic prosthesis Download PDFInfo
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Abstract
The invention discloses a milling-grinding forming and manufacturing method of a dental all-ceramic prosthesis. In the manufacturing process, a supporting column for fixing ceramic blocks and the prosthesis is not needed, so that the phenomenon that the formed prosthesis and the surrounding ceramic blocks are separated due to manual grinding removal of the supporting column is avoided, and the process of polishing the excessively-rough outer surface of the prosthesis, caused by grinding removal of the supporting column, is avoided; accordingly, the risk of cracking and premature breakage and failure is lowered. Thin-wall cervical margins can be better processed when the ceramic blocks are milled and ground under the supporting of model material blocks. Particularly, it is more conductive to improve the smoothness of the outer surface of the dental all-ceramic prosthesis when unsintered ceramic scleroma bisque is milled and ground. No supporting column connecting point exists on the outer surface, and no polishing scratch or fractured porcelain occurs to the partial area; the surface is smooth and clean, the structure is even and coherent, and the reliability is high.
Description
The application is application number: 2014103926613, and the applying date is 2014.08.12, the divisional application of the Chinese invention patent application that name is called " a kind of milling shaping manufacture method of dental all-ceramics dummy ".
Technical field
The present invention relates to and belong to dental porcelain manufacture technology field, particularly a kind of milling shaping manufacture method of dental all-ceramics dummy.
Background technology
The seventies in last century, computer-aided design and area of computer aided are made (CAD/CAM) technology and introduce dental field by French dentist Duret.Its principle is: utilize photovoltaic principals by the three-dimensional configuration of tooth preparation body with the Information Monitoring of photoelectric sensor end, is formed " optics die "; Again optics die is inputted computer, utilize software to carry out three-dimensional reconstruction, obtain " optics Working mould "; Optics Working mould designs the blank of dental prosthesis, after carefully revising, forms " computer wax pattern "; Finally computer wax pattern is inputted numerical-control milling and grinding machining center as controling parameters, the pre-porcelain making block fixed in advance is processed into the shape of dummy, the feature according to the selection of material obtains the dental prosthesis with personalized form again after different process.Developing rapidly in recent years along with CAD/CAM technology and machinable repair materials, the particularly development of machinable ceramic material, promotes development and the application of dental all-ceramics dummy further.
Different according to the compactness extent of machinable ceramic porcelain block, two classes can be divided into: a class is silicate base ceramic, hardening oxidation aluminum and hardening oxidation zircon porcelain block, pre-porcelain making block is clamped on numerical-control milling and grinding machining center workbench, process according to " computer wax pattern " equal proportion, the dummy be shaped, without the need to sintering, directly can be applied or be applied to patient after skilled worker room aesthetics is modified; Another kind of is dry pressing and the soft Woelm Alumina partially sintered and zirconium oxide porcelain block, pre-porcelain making block is clamped on numerical-control milling and grinding machining center workbench, according to known material sintering shrinkage, " computer wax pattern " equal proportion is amplified processing, the dummy base substrate be shaped is fine and close through double sintering, obtains final all-ceramic prosthesis.Existing multiple patent relates to CAD/CAM fabrication techniques dental all-ceramics dummy, such as international monopoly US20050261795 A1, EP0824897 B1, domestic patent CN201676029U, CN202682074U, CN202682075U, CN102579148A etc. both at home and abroad.
In the method for the CAD/CAM fabrication techniques dental all-ceramics dummy that above-mentioned patent describes, porcelain block is around departed from gradually along with the reduction of adjacent material in order to prevent in the course of processing dummy, thus reduce stability and the precision of milling, even processing midway dummy generation brittle fracture, add man-hour requirement the outer surface (axial plane) of dummy reserved with around the support column (also claiming connecting rod) that is connected of porcelain block with fixed restoration.After machining, these support columns need Dental Technician manual worn with dentistry low speed mobile phone, to be separated dummy and surrounding porcelain block (as shown in Figure 1).Manual worn support column adds the workload of technician, reduce automatization's processed edge of CAD/CAM technology, and the surface smoothness of dummy surface junction point near zone can be reduced, affect the performance attractive in appearance of dummy, accelerate the even variable color of dummy surface pigmentation, adjacent teeth excessive wear may be caused in coarse surface.Therefore, also need to carry out sanding and polishing to dummy outer surface after manual worn support column.May occur in bruting process to cross thin section and burst apart owing to vibrating the dummy that causes, particularly Prosthetic margin; Manual grinding can introduce local stress and microscopic defect at dummy outer surface, reduces long-time stability and the reliability of dummy, even causes dummy premature failure, repairing failure.
Summary of the invention
The object of the present invention is to provide a kind of milling shaping manufacture method of dental all-ceramics dummy, support column is not needed to fix porcelain block and dummy in manufacturing process, avoid manual worn support column with separating shaped dummy and surrounding porcelain block, and the sanding and polishing operation for avoiding worn support column post-prosthesis outer surface excess abrasive to carry out, thus reduce that dummy bursts apart, the risk of premature failure failure.Adopt the dental all-ceramics dummy that technical scheme of the present invention makes, outer surface does not have support column junction point, does not locally have polishing scratch and burst apart, and any surface finish, even structure are coherent, and reliability is high.
The technical solution adopted for the present invention to solve the technical problems is:
A milling shaping manufacture method for dental all-ceramics dummy, described manufacture method selects one of following scheme:
scheme onecomprise the following steps:
Step 1: carry out conventional tooth preparation according to the tooth preparation standard of all-ceramic prosthesis;
Step 2: produce at least to comprise and intend repairing tooth preparation, intend repairing the both sides adjacent teeth of tooth and intend repairing the denture optical model to jaw tooth (fashionablely more meet true denture form to guarantee that dummy is worn in mouth, recover syntopy and meshing functions) of tooth;
Step 3: with step 2 gained denture optical model for data source, obtains the computer wax pattern of all-ceramic prosthesis by the design of dental prosthetic design software, it considers ceramic firing and shrink the amplification quantity required;
Step 4: according to computer wax pattern inner surface form, by numerical-control milling and grinding machining center milling porous ceramics porcelain block, obtains the inner former ceramic blank with computer wax pattern inner surface form; Porous ceramics porcelain block can be through the dry-pressing porcelain block partially sintered, and also can be the pottery scleroma biscuit without sintering.
Step 5: according to computer wax pattern inner surface form, by numerical-control milling and grinding machining center milling model material block, obtains the formpiston material block with computer wax pattern inner surface form;
Step 6: step 4 gained former ceramic blank is transferred to matched moulds on the step 5 gained formpiston material block that mates with it, and adopt non-fixture anchoring methods to fix (retention meet stablely in the ceramic blank course of processing not vibrate, requirement that displacement is even dropped);
Step 7: according to computer wax pattern outer surface form, by numerical-control milling and grinding machining center milling former ceramic blank, obtains the dental all-ceramics dummy base substrate consistent with computer wax pattern form;
Step 8: take off dental all-ceramics dummy base substrate from formpiston material block;
Step 9: dental all-ceramics dummy base substrate puts into sintering furnace sintering, forms fine and close dental all-ceramics dummy;
scheme twocomprise the following steps:
Step 1: carry out conventional tooth preparation according to the tooth preparation standard of all-ceramic prosthesis;
Step 2: produce at least to comprise and intend repairing tooth preparation, intend repairing the both sides adjacent teeth of tooth and intend repairing the denture optical model to jaw tooth (fashionablely more meet true denture form to guarantee that dummy is worn in mouth, recover syntopy and meshing functions) of tooth;
Step 3: with step 2 gained denture optical model for data source, obtains the computer wax pattern of all-ceramic prosthesis by the design of dental prosthetic design software, it considers ceramic firing and shrink the amplification quantity required;
Step 4: according to computer wax pattern outer surface form, by numerical-control milling and grinding machining center inside milling model material block, height of contour line to labial teeth cuts the part in end or posterior occlusion face according to the milling of computer wax pattern outer surface form, height of contour line to neck edge is divided along height of contour and the milling of model material block vertical line, do not make the inverted concave state of below height of contour, obtain the inner former material block with computer wax pattern outer surface portion division aspect;
Step 5: according to the computer wax pattern outer surface portion division aspect in computer wax pattern outer surface intact form or step 4, by numerical-control milling and grinding machining center milling porous ceramics porcelain block, acquisition has computer wax pattern outer surface intact form, or the formpiston ceramic blank with computer wax pattern outer surface portion division aspect obtained;
Step 6: step 4 gained former material block is transferred to matched moulds on step 5 gained formpiston ceramic blank, and adopt non-fixture anchoring methods to fix (retention to meet in the ceramic blank course of processing stablely not vibrate, requirement that displacement is even dropped);
Step 7: according to computer wax pattern inner surface form, or computer wax pattern inner surface form and computer wax pattern outer surface height of contour line are with the configuration of surface of lower part, by numerical-control milling and grinding machining center milling formpiston ceramic blank, obtain the dental all-ceramics dummy base substrate consistent with computer wax pattern form;
Step 8: take off dental all-ceramics dummy base substrate from former material block;
Step 9: dental all-ceramics dummy base substrate puts into sintering furnace sintering, forms fine and close dental all-ceramics dummy.
In the step 4,5 of the present invention program one and scheme two, single leaf-comb or the single three above fixed bridges of unit can be processed by the cooperation of single Yin/Yang mould ceramic blank and corresponding single male/female mould material block, also by being engaged in the Yin/Yang mould single porcelain block being processed multiple computer wax pattern inner surface form and the male/female mould processing corresponding multiple computer wax pattern inner surface form on single model material block processes multiple leaf-comb, or multiple three above fixed bridges of unit.
In the step 8 of the present invention program one and scheme two, take off the method for dental all-ceramics dummy base substrate for directly clamping dummy base substrate taking-up, or take out dummy base substrate by vacuum suction, as necessary by heat fused bonding agent, in taking-up process, do not destroy the integrity of dummy base substrate.
As preferably, described model material block of material selects the combination of one or more in Gypsum Fibrosum, paraffin, epoxy resin block, polyethylene.
As preferably, described porous ceramics porcelain block of material is selected from the combination of one or more in aluminium oxide, zirconium oxide, spinelle, garnet, mullite, and the porous ceramics porcelain block porosity is 20 ~ 60%.
As preferably, the described porous ceramics porcelain block porosity is 30 ~ 50%.
As preferably, by mass percentage, described porous ceramics porcelain block of material is the complex that the complex that forms of complex, 20% zirconium oxide and 80% aluminium oxide that 5% spinelle and 95% zirconium oxide form or 10% garnet and 90% aluminium oxide form.
As preferably, in the step 2 of scheme one and scheme two, the acquisition pattern of denture optical model is selected from one of following scheme:
Scheme 1: clinically produce dentition impression, dentistry scanner scanning dentition impression is also converted into denture optical model by dental CAD software;
Scheme 2: clinically produce dentition impression, records plaster model, and dentistry scanner scanning plaster model obtains denture optical model;
Scheme 3: dentistry mouth interscan instrument, in mouth interscan denture, directly obtains denture optical model.
As preferably, in the step 6 of scheme one and scheme two, described non-fixture anchoring methods is vacuum maintenance or cemented retention.
As preferably, the bonding agent that cemented retention uses is wax, vaseline or epoxy resin.
As preferably, in the step 9 of scheme one and scheme two, sintering temperature 1300 DEG C ~ 1600 DEG C, temperature retention time 0.1h ~ 3h.
The invention has the beneficial effects as follows:
1, support column is not needed to fix porcelain block and dummy in manufacturing process, avoid manual worn support column with separating shaped dummy and surrounding porcelain block, and the sanding and polishing operation for avoiding worn support column post-prosthesis outer surface excess abrasive to carry out, thus reduce that dummy bursts apart, the risk of premature failure failure.
2, dental all-ceramics dummy outer surface does not have support column junction point, does not locally have polishing scratch and burst apart, and any surface finish, even structure are coherent, and reliability is high.
3, under the condition having model material block to support, milling porcelain block is more conducive to processing thin-walled neck edge and improves processed finished products rate.
4, milling is more conducive to improve dental all-ceramics dummy outer surface fineness without the pottery scleroma biscuit of sintering.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the dental all-ceramics dummy base substrate (leaf-comb) that CAD/CAM technology that order is commonly used shapes.
Fig. 2 is the schematic diagram of dental all-ceramics dummy base substrate (leaf-comb) of the present invention.
Fig. 3 is the step schematic diagram of the milling shaping manufacture method of a kind of dental all-ceramics dummy of the present invention.
Fig. 4 is the step schematic diagram of the milling shaping manufacture method of another kind of dental all-ceramics dummy of the present invention.
Fig. 5 is the step schematic diagram of the milling shaping manufacture method by another kind of dental all-ceramics dummy of the present invention.
In figure: 1, model material block, 2, porous ceramics porcelain block, 3, dental all-ceramics dummy base substrate, 4, support column.
Detailed description of the invention
Below by specific embodiment, and by reference to the accompanying drawings, technical scheme of the present invention is described in further detail.
In the present invention, if not refer in particular to, the raw material adopted and equipment etc. all can be buied from market or this area is conventional.Method in following embodiment, if no special instructions, is the conventional method of this area.
Fig. 1 is the schematic diagram of dental all-ceramics dummy 3 base substrate (leaf-comb) that current existing CAD/CAM technology shapes, the outer surface (axial plane) of dental all-ceramics dummy 3 has the support column 4 be connected with around porcelain block, machines rear needs by manual worn.
As shown in Figure 2, dental all-ceramics dummy base substrate 3 and surrounding mold material block or porcelain block are connected and fixed in manufacturing process of the present invention without the need to support column 4, dummy outer surface is local polishing scratch not, any surface finish and structure is homogeneous.
Embodiment 1
For case and recovery scenario: backteeth large area dental defect, make backteeth zirconium oxide leaf-comb all-ceramic prosthesis.
A milling shaping manufacture method for dental all-ceramics dummy, as shown in Figure 3, comprises the following steps:
Step 1: carry out conventional tooth preparation according to the tooth preparation standard of zirconium oxide all-ceramic prosthesis: the worn 1.5mm ~ 2.0mm of occlusal surface, worn 1.0 ~ the 1.5mm of axial plane, wide 0.5 ~ the 0.8mm of neck edge shoulder, the axial plane degree of polymerization 6 ~ 8 DEG C, each point angle and the blunt smoothness of line angle circle.
Step 2: adopt 3Shape mouth interscan instrument TROIS directly to scan upper and lower denture, obtain denture optical model.
Step 3: with step 2 gained denture optical model for data source, by dental prosthetic design software 3Shape dental CAD system DentalDesigner
tMset up optics Working mould, the computer wax pattern of design all-ceramic prosthesis, it considers ceramic firing and shrink the amplification quantity required.
Step 4: according to computer wax pattern inner surface form, by numerical-control milling and grinding machining center milling porous ceramics porcelain block 2(zirconium oxide, the porosity is 20%, be through the dry-pressing porcelain block partially sintered), obtain inside and there is the former ceramic blank of computer wax pattern inner surface form (see Fig. 3 a).
Step 5: according to computer wax pattern inner surface form, numerical-control milling and grinding machining center milling model material block 1(plaster block), obtain the formpiston material block (see Fig. 3 b) with computer wax pattern inner surface form.
Step 6: step 4 gained former ceramic blank is transferred to matched moulds on the step 5 gained formpiston material block that mates with it, and adopts vacuum maintenance to fix (see Fig. 3 c).
Step 7: according to computer wax pattern outer surface form, with numerical-control milling and grinding machining center milling former ceramic blank, obtains the dental all-ceramics dummy base substrate 3 (see Fig. 3 d) consistent with computer wax pattern form.
Step 8: take off dental all-ceramics dummy base substrate 3 (see Fig. 3 e) from formpiston material block.
Step 9: dental all-ceramics dummy base substrate is put into sintering furnace and sintered to 1300 DEG C, temperature retention time 2h, furnace cooling with heating rate 5 ~ 10 DEG C/min, forms fine and close dental all-ceramics dummy.
Embodiment 2
For case and recovery scenario: backteeth large area dental defect, make backteeth Zirconia-alumina composite leaf-comb all-ceramic prosthesis.
Step 1: carry out conventional tooth preparation according to the tooth preparation standard of all-ceramic prosthesis: the worn 1.5mm ~ 2.0mm of occlusal surface, the worn 1.0 ~ 1.5mm of axial plane, the wide 0.5 ~ 0.8mm of neck edge shoulder, the axial plane degree of polymerization 6 ~ 8 DEG C, each point angle and the blunt smoothness of line angle circle.
Step 2: clinically produce upper and lower dentition die, adopts 3Shape desktop scanners D810 directly to scan dentition impression, by dental prosthetic design software 3Shape dental CAD system DentalDesigner
tMbe converted into denture optical model.
Step 3: with step 2 gained denture optical model for data source, by dental prosthetic design software 3Shape dental CAD system DentalDesigner
tMset up optics Working mould, the computer wax pattern of design all-ceramic prosthesis, it considers ceramic firing and shrink the amplification quantity required.
Step 4: according to computer wax pattern inner surface form, by the complex that numerical-control milling and grinding machining center milling porous ceramics porcelain block 2(20% zirconium oxide and 80% aluminium oxide form, the porosity is 60%, the pottery scleroma biscuit without sintering), obtain inside and there is the former ceramic blank of computer wax pattern inner surface form (see Fig. 3 a).
Step 5: according to computer wax pattern inner surface form, numerical-control milling and grinding machining center milling model material block 1(paraffin), obtain the formpiston material block (see Fig. 3 b) with computer wax pattern inner surface form.
Step 6: step 4 gained former ceramic blank is transferred to matched moulds on the step 5 gained formpiston material block that mates with it, and adopts cemented retention (bonding agent is wax) to fix (see Fig. 3 c).
Step 7: according to computer wax pattern outer surface form, with numerical-control milling and grinding machining center milling former ceramic blank, obtains the dental all-ceramics dummy base substrate 3 (see Fig. 3 d) consistent with computer wax pattern form.
Step 8: take off dental all-ceramics dummy base substrate 3 (see Fig. 3 e) from formpiston material block.
Step 9: dental all-ceramics dummy base substrate is put into sintering furnace and sintered to 1400 DEG C, temperature retention time 3h, furnace cooling with heating rate 5 ~ 10 DEG C/min, forms fine and close dental all-ceramics dummy.
Embodiment 3
For case and recovery scenario: backteeth large area dental defect, make backteeth Zirconia-alumina composite leaf-comb all-ceramic prosthesis.
A milling shaping manufacture method for dental all-ceramics dummy, as shown in Figure 4, comprises the following steps:
Step 1: carry out conventional tooth preparation according to the tooth preparation standard of all-ceramic prosthesis: the worn 1.5mm ~ 2.0mm of occlusal surface, the worn 1.0 ~ 1.5mm of axial plane, the wide 0.5 ~ 0.8mm of neck edge shoulder, the axial plane degree of polymerization 6 ~ 8 DEG C, each point angle and the blunt smoothness of line angle circle.
Step 2: clinically produce upper and lower dentition die, adopts 3Shape desktop scanners D810 directly to scan dentition impression, by dental prosthetic design software 3Shape dental CAD system DentalDesigner
tMbe converted into denture optical model.
Step 3: with step 2 gained denture optical model for data source, by dental prosthetic design software 3Shape dental CAD system DentalDesigner
tMset up optics Working mould, the computer wax pattern of design all-ceramic prosthesis, it considers ceramic firing and shrink the amplification quantity required.
Step 4: according to computer wax pattern outer surface form, numerical-control milling and grinding machining center inside milling model material block 1(Gypsum Fibrosum), height of contour line to the part in posterior occlusion face according to the milling of computer wax pattern outer surface form, height of contour line to neck edge is divided along height of contour and the milling of model material block 1 vertical line, do not make the inverted concave state of below height of contour, (Fig. 4 a) to obtain the inner former material block with partial computer wax pattern outer surface form.
Step 5: according to computer wax pattern outer surface intact form, the complex that numerical-control milling and grinding machining center milling porous ceramics porcelain block 2(20% zirconium oxide and 80% aluminium oxide form, the porosity is 50%, the pottery scleroma biscuit without sintering), obtain the formpiston ceramic blank (Fig. 4 b) with computer wax pattern outer surface intact form.
Step 6: step 4 gained former material block is transferred to matched moulds on step 5 gained formpiston ceramic blank, and adopt cemented retention (bonding agent is vaseline) to fix (Fig. 4 c).
Step 7: according to computer wax pattern inner surface form, with numerical-control milling and grinding machining center milling formpiston ceramic blank, obtains the dental all-ceramics dummy base substrate 3(Fig. 4 d consistent with computer wax pattern form).
Step 8: take off dental all-ceramics dummy base substrate 3(Fig. 4 e from former material block).
Step 9: dental all-ceramics dummy base substrate is put into sintering furnace and sintered to 1400 DEG C, temperature retention time 3h, furnace cooling with heating rate 5 ~ 10 DEG C/min, forms fine and close dental all-ceramics dummy.
Embodiment 4
For case and recovery scenario: backteeth large area dental defect, make backteeth zirconium oxide leaf-comb all-ceramic prosthesis.
A milling shaping manufacture method for dental all-ceramics dummy, as shown in Figure 4, comprises the following steps:
Step 1: carry out conventional tooth preparation according to the tooth preparation standard of all-ceramic prosthesis: the worn 1.5mm ~ 2.0mm of occlusal surface, the worn 1.0 ~ 1.5mm of axial plane, the wide 0.5 ~ 0.8mm of neck edge shoulder, the axial plane degree of polymerization 6 ~ 8 DEG C, each point angle and the blunt smoothness of line angle circle.
Step 2: adopt 3Shape mouth interscan instrument TROIS directly to scan upper and lower denture, obtain denture optical model.
Step 3: with step 2 gained denture optical model for data source, by dental prosthetic design software 3Shape dental CAD system DentalDesigner
tMset up optics Working mould, the computer wax pattern of design all-ceramic prosthesis, it considers ceramic firing and shrink the amplification quantity required.
Step 4: according to computer wax pattern outer surface form, numerical-control milling and grinding machining center inside milling model material block 1(paraffin), height of contour line to the part in posterior occlusion face according to the milling of computer wax pattern outer surface form, height of contour line to neck edge is divided along height of contour and the milling of model material block 1 vertical line, do not make the inverted concave state of below height of contour, (Fig. 4 a) to obtain the inner former material block with partial computer wax pattern outer surface form.
Step 5: according to computer wax pattern outer surface intact form, numerical-control milling and grinding machining center milling porous ceramics porcelain block 2(zirconium oxide, the porosity is 50%, is through the dry-pressing porcelain block partially sintered), obtain the formpiston ceramic blank (Fig. 4 b) with computer wax pattern outer surface intact form.
Step 6: step 4 gained former material block is transferred to matched moulds on step 5 gained formpiston ceramic blank, and adopts vacuum maintenance to fix (Fig. 4 c).
Step 7: according to computer wax pattern inner surface form, with numerical-control milling and grinding machining center milling formpiston ceramic blank, obtains the dental all-ceramics dummy base substrate 3(Fig. 4 d consistent with computer wax pattern form).
Step 8: take off dental all-ceramics dummy base substrate 3(Fig. 4 e from former material block).
Step 9: dental all-ceramics dummy base substrate is put into sintering furnace and sintered to 1300 DEG C, temperature retention time 2h, furnace cooling with heating rate 5 ~ 10 DEG C/min, forms fine and close dental all-ceramics dummy.
Embodiment 5
For case and recovery scenario: backteeth large area dental defect, make backteeth spinelle-zirconium oxide leaf-comb all-ceramic prosthesis.
A milling shaping manufacture method for dental all-ceramics dummy, as shown in Figure 5, comprises the following steps:
Step 1: carry out conventional tooth preparation according to the tooth preparation standard of all-ceramic prosthesis: the worn 1.5mm ~ 2.0mm of occlusal surface, the worn 1.0 ~ 1.5mm of axial plane, the wide 0.5 ~ 0.8mm of neck edge shoulder, the axial plane degree of polymerization 6 ~ 8 DEG C, each point angle and the blunt smoothness of line angle circle.
Step 2: adopt 3Shape mouth interscan instrument TROIS directly to scan upper and lower denture, obtain denture optical model.
Step 3: with step 2 gained denture optical model for data source, by dental prosthetic design software 3Shape dental CAD system DentalDesigner
tMset up optics Working mould, the computer wax pattern of design all-ceramic prosthesis, it considers ceramic firing and shrink the amplification quantity required.
Step 4: according to computer wax pattern outer surface form, by numerical-control milling and grinding machining center milling model material block 1(epoxy resin block), height of contour line to the part in posterior occlusion face according to the milling of computer wax pattern outer surface form, height of contour line to neck edge is divided along height of contour and the milling of model material block 1 vertical line, do not make the inverted concave state of below height of contour, obtain inside and there is the former material block of computer wax pattern outer surface portion division aspect (see Fig. 5 a).
Step 5: according to the computer wax pattern outer surface portion division aspect in step 4, by the complex that numerical-control milling and grinding machining center milling porous ceramics porcelain block 2(5% spinelle and 95% zirconium oxide form, the porosity is 40%, the pottery scleroma biscuit without sintering), obtain the formpiston ceramic blank (see Fig. 5 b) with computer wax pattern outer surface portion division aspect;
Step 6: step 4 gained former material block is transferred to matched moulds on the step 5 gained formpiston ceramic blank mated with it, and adopt cemented retention (bonding agent is vaseline) to fix (see Fig. 5 c).
Step 7: according to computer wax pattern inner surface form and computer wax pattern outer surface height of contour line with the configuration of surface of lower part, by numerical-control milling and grinding machining center milling formpiston ceramic blank, obtain the dental all-ceramics dummy base substrate 3 (see Fig. 5 d) consistent with computer wax pattern form.
Step 8: take off dental all-ceramics dummy base substrate 3 (see Fig. 5 e) from former material block.
Step 9: dental all-ceramics dummy base substrate is put into sintering furnace and sintered to 1400 DEG C, temperature retention time 2h, furnace cooling with heating rate 5 ~ 10 DEG C/min, forms fine and close dental all-ceramics dummy.
Embodiment 6
For case and recovery scenario: backteeth large area dental defect, make backteeth garnet-aluminium oxide leaf-comb all-ceramic prosthesis.
A milling shaping manufacture method for dental all-ceramics dummy, as shown in Figure 5, comprises the following steps:
Step 1: carry out conventional tooth preparation according to the tooth preparation standard of all-ceramic prosthesis: the worn 1.5mm ~ 2.0mm of occlusal surface, the worn 1.0 ~ 1.5mm of axial plane, the wide 0.5 ~ 0.8mm of neck edge shoulder, the axial plane degree of polymerization 6 ~ 8 DEG C, each point angle and the blunt smoothness of line angle circle.
Step 2: adopt 3Shape mouth interscan instrument TROIS directly to scan upper and lower denture, obtain denture optical model.
Step 3: with step 2 gained denture optical model for data source, by dental prosthetic design software 3Shape dental CAD system DentalDesigner
tMset up optics Working mould, the computer wax pattern of design all-ceramic prosthesis, it considers ceramic firing and shrink the amplification quantity required.
Step 4: according to computer wax pattern outer surface form, by numerical-control milling and grinding machining center milling model material block 1(epoxy resin block), height of contour line to the part in posterior occlusion face according to the milling of computer wax pattern outer surface form, height of contour line to neck edge is divided along height of contour and the milling of model material block 1 vertical line, do not make the inverted concave state of below height of contour, obtain inside and there is the former material block of computer wax pattern outer surface portion division aspect (see Fig. 5 a).
Step 5: according to the computer wax pattern outer surface portion division aspect in step 4, by the complex that numerical-control milling and grinding machining center milling porous ceramics porcelain block 2(10% garnet and 90% aluminium oxide form, the porosity is 40%, the pottery scleroma biscuit without sintering), obtain the formpiston ceramic blank (see Fig. 5 b) with computer wax pattern outer surface portion division aspect;
Step 6: step 4 gained former material block is transferred to matched moulds on the step 5 gained formpiston ceramic blank mated with it, and adopt cemented retention (bonding agent is epoxy resin) to fix (see Fig. 5 c).
Step 7: according to computer wax pattern inner surface form and computer wax pattern outer surface height of contour line with the configuration of surface of lower part, by numerical-control milling and grinding machining center milling formpiston ceramic blank, obtain the dental all-ceramics dummy base substrate 3 (see Fig. 5 d) consistent with computer wax pattern form.
Step 8: take off dental all-ceramics dummy base substrate 3(Fig. 5 e from former material block).
Step 9: dental all-ceramics dummy base substrate is put into sintering furnace and sintered to 1600 DEG C, temperature retention time 0.1h, furnace cooling with heating rate 5 ~ 10 DEG C/min, forms fine and close dental all-ceramics dummy.
The present invention can process single leaf-comb or the single three above fixed bridges of unit by the cooperation of single Yin/Yang mould ceramic blank and corresponding single male/female mould material block, also by being engaged in the Yin/Yang mould single porcelain block being processed multiple computer wax pattern inner surface form and the male/female mould processing corresponding multiple computer wax pattern inner surface form on single model material block processes multiple leaf-comb, or multiple three above fixed bridges of unit.
Above-described embodiment is preferably scheme more of the present invention, not does any pro forma restriction to the present invention, also has other variant and remodeling under the prerequisite not exceeding the technical scheme described in claim.
Claims (9)
1. a milling shaping manufacture method for dental all-ceramics dummy, it is characterized in that, described manufacture method comprises the following steps:
Step 1: carry out conventional tooth preparation according to the tooth preparation standard of all-ceramic prosthesis;
Step 2: produce at least to comprise and intend repairing tooth preparation, intend repairing the both sides adjacent teeth of tooth and intend repairing the denture optical model to jaw tooth of tooth;
Step 3: with step 2 gained denture optical model for data source, obtains the computer wax pattern of all-ceramic prosthesis by the design of dental prosthetic design software;
Step 4: according to computer wax pattern outer surface form, by numerical-control milling and grinding machining center inside milling model material block, height of contour line to labial teeth cuts the part in end or posterior occlusion face according to the milling of computer wax pattern outer surface form, height of contour line to neck edge is divided along height of contour and the milling of model material block vertical line, do not make the inverted concave state of below height of contour line, obtain the inner former material block with computer wax pattern outer surface portion division aspect;
Step 5: according to the computer wax pattern outer surface portion division aspect in computer wax pattern outer surface intact form or step 4, by numerical-control milling and grinding machining center milling porous ceramics porcelain block, acquisition has computer wax pattern outer surface completion morphology, or the formpiston ceramic blank with computer wax pattern outer surface portion division aspect obtained;
Step 6: step 4 gained former material block is transferred to matched moulds on step 5 gained formpiston ceramic blank, and adopts non-fixture anchoring methods to fix;
Step 7: according to computer wax pattern inner surface form, or computer wax pattern inner surface form and computer wax pattern outer surface height of contour line are with the configuration of surface of lower part, by numerical-control milling and grinding machining center milling formpiston ceramic blank, obtain the dental all-ceramics dummy base substrate consistent with computer wax pattern form;
Step 8: take off dental all-ceramics dummy base substrate from former material block;
Step 9: dental all-ceramics dummy base substrate puts into sintering furnace sintering, forms fine and close dental all-ceramics dummy.
2. milling shaping manufacture method according to claim 1, is characterized in that: described model material block of material selects the combination of one or more in Gypsum Fibrosum, paraffin, epoxy resin, polyethylene.
3. milling shaping manufacture method according to claim 1 and 2, it is characterized in that: described porous ceramics porcelain block of material is selected from the combination of one or more in aluminium oxide, zirconium oxide, spinelle, garnet, mullite, the porous ceramics porcelain block porosity is 20 ~ 60%.
4. milling shaping manufacture method according to claim 3, is characterized in that: the described porous ceramics porcelain block porosity is 30 ~ 50%.
5. milling shaping manufacture method according to claim 3, it is characterized in that: by mass percentage, described porous ceramics porcelain block composite is the complex that the complex that forms of complex, 20% zirconium oxide and 80% aluminium oxide that 5% spinelle and 95% zirconium oxide form or 10% garnet and 90% aluminium oxide form.
6. milling shaping manufacture method according to claim 1 and 2, is characterized in that: in step 2, and the acquisition pattern of denture optical model is selected from one of following scheme:
Scheme 1: clinically produce dentition impression, dentistry scanner scanning dentition impression is also converted into denture optical model by dental CAD software;
Scheme 2: clinically produce dentition impression, records plaster model, and dentistry scanner scanning plaster model obtains denture optical model;
Scheme 3: dentistry mouth interscan instrument, in mouth interscan denture, directly obtains denture optical model.
7. milling shaping manufacture method according to claim 1 and 2, is characterized in that: in step 6, and described non-fixture anchoring methods is vacuum maintenance or cemented retention.
8. milling shaping manufacture method according to claim 7, is characterized in that: the bonding agent that cemented retention uses is wax, vaseline or epoxy resin.
9. milling shaping manufacture method according to claim 1 and 2, is characterized in that: in step 9, sintering temperature 1300 DEG C ~ 1600 DEG C, temperature retention time 0.1h ~ 3h.
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| CN112006789A (en) * | 2020-08-11 | 2020-12-01 | 杭州雅齿美口腔科技有限公司 | Composite ceramic veneering process |
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| WO2016023470A1 (en) * | 2014-08-12 | 2016-02-18 | 杭州而然科技有限公司 | Dental all-ceramic restoration and manufacturing method thereof |
| CN105411720B (en) * | 2016-01-05 | 2021-08-17 | 金艺鹏 | Method for manufacturing canine dental crown |
| CN108095837B (en) * | 2017-12-13 | 2021-04-06 | 深圳牙领科技有限公司 | Data processing method and terminal |
| CN108618857B (en) * | 2018-02-06 | 2020-11-27 | 北京大学口腔医学院 | Design and manufacturing method of accurate bionic aesthetic restoration body |
| CN109044549B (en) * | 2018-08-10 | 2021-01-15 | 精瓷齿科技术（昆山）有限公司 | Method for making full-ceramic tooth |
| CN114699196A (en) * | 2022-03-04 | 2022-07-05 | 杭州隐捷适生物科技有限公司 | Design method of accurate false tooth and false tooth thereof |
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| CN104905882B (en) | 2016-06-15 |
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Denomination of invention: Milling forming and manufacturing method of dental all ceramic restoration Effective date of registration: 20220117 Granted publication date: 20160615 Pledgee: Beijing longxinda Investment Management Co.,Ltd. Pledgor: HANGZHOU ERRAN TECHNOLOGY Co.,Ltd. Registration number: Y2022330000097 |