CN102426614A - Computer aided design and manufacturing method of dental personalized integrated non-metal pile core - Google Patents

Abstract

A computer aided design manufacturing method of personalized integrated non-metal post cores for dental clinical use comprises the following steps: 1. preparing a tooth body, and preparing a silicon rubber impression to copy the shape of the defective diseased tooth; 2. acquiring three-dimensional data of the impression by a high-precision optical scanner; 3. selecting a suitable coronal kernel from a database; 4. splicing and processing the defective root canal and section data and the crown nucleus data through three-dimensional design software, and establishing a virtual model of the personalized integrated pile nucleus; 5. and importing the pile core data in the STL format into a computer-aided manufacturing numerical control center, and selecting a proper non-metal blank to process into a personalized integrated pile core entity. The computer aided design manufacturing method of the personalized integrated non-metal pile core omits the procedures of pouring a gypsum model, manufacturing a wax pattern and the like, shortens the processing period, reduces the manufacturing error, can achieve higher precision, has better fit between the pile core object and the residual tooth tissue, can also enhance the fracture resistance of the pile core restoration body, and reduces the risk of restoration failure.

Description

The computer-aided design (CAD) method for making of the personalized integrated nonmetal stake nuclear of tooth section

[technical field]

The present invention relates to the dental prosthesis computer-aided design (CAD) and make the field, specifically is the personalized integrated nonmetal stake nuclear computer-aided design (CAD) method for making that is used to repair tooth body large defect.

[background technology]

In oral repairing clinic work, there are reasons such as many patient's tooth are bad because of dental caries, wound, bad dummy to cause the corona serious defect, form the residual crown undesirable root, have a strong impact on attractive in appearance and function.Stake nuclear recovery technique is the Perfected process of present treatment residual crown undesirable root of generally acknowledging.Stake is examined structurally and is made up of stake and hat nuclear two parts, and it is interior for top hat nuclear provides maintenance that stake cements in the trouble canalis radicis dentis, also plays the effect of reinforcing root of the tooth simultaneously; The main effect of hat nuclear is to combine with the residual tooth tissue, tentatively recovers the corona general profile, for the overcoat corona reparation in later stage provides maintenance.

The more stake nuclear of clinical practice at present has metal casting stake nuclear and two kinds of forms of preformation fibre resin stake binding resin nuclear.Two kinds of forms all have clear and definite relative merits,

One, metal casting stake nuclear.Metal casting stake nuclear is extensive in clinical practice, and it is to be made through lost wax process after making wax pattern according to the personalized form of suffering from canalis radicis dentis, and adaptation and rupture strength are higher.Integrated homogeneous texture is examined in the metal casting stake, with the driving fit of trouble canalis radicis dentis, can guarantee the intensity and the maintenance of dummy.But metal material hardness is too high, and elastic modulus may cause root of the tooth splitting at the inner wedge stress that produces of weak root of the tooth far above dentine under the functional status; And the elastic modulus gap of metal material and bonding cement is also bigger, and the combination interface between the two maybe stress is concentrated, and bond failure takes place because of producing, and finally causes stake nuclear to come off; The metal stake does not have light transmission, be not suitable for and all-ceramic crown collocation is used, and metal material in mouth in the environment regular meeting make gum turn grey deepening, cause situation such as gingival recession, it is healthy and attractive in appearance to have a strong impact on gum; Nickel-chrome also can produce pseudo-shadow in Magnetic resonance imaging, influence picture quality, has limited magnetic resonance imaging in the application of incidence and accurately diagnosis.

Two, nonmetal stake nuclear.What clinical practice was maximum is the fibre resin stake, and over year, preformation creamy white fiber stake+resin core becomes emerging stake nuclear material surplus in the of nearly ten; Its histocompatbility, cohesiveness and color and luster aesthetic property all are superior to metal material; Have the elastic modulus approximate, be difficult for causing root of the tooth jackknifing, do not cause gingival discoloration with dentine; Can not influence Magnetic resonance imaging, clinical practice is more and more.

But the stake of preformation fiber is a standardized production; Fixed size; Can't with the residual tooth of damaged trouble tooth coupling well organized, tiny fiber stake is easy when being applied to damaged big, no dentine shoulder neck the trouble tooth of drag and maintenance being provided fractures, comes off, and causes repairing failure.Preformation fiber stake+resin core is not integrated homogeneous texture; The existence of combination interface is arranged in the fiber stake with at the nuclear resin that fiber pile crown portion heap is moulded; Resin core has chipping phenomenon when receiving big external force, and nuclear resin is mobile high, and corona is damaged to be difficult for heap when big and to be moulded shape.

Both at home and abroad carried out some improvement to the restorative procedure of the tooth residual crown undesirable root of serious defect in recent years, as: repair with metal pile nuclear again after with resin material root canal wall being reinvented; Using resin prepreg profit plasticity glass fiber to carry out stake examines moulding; Add with polyethylene fibre band fibrous bundle and clog root ligament etc., with the adaptation and the intensity of fortifying fibre stake dummy.But the other running time of these method chairs is long, and operative technique is required height, and the wayward resin material of operator forms the intensity and the quality of stake nuclear, and wide clinical application is limited.

Personalized integrated nonmetal stake nuclear energy in conjunction with the advantage of above-mentioned two kinds of stake kernel form enough overcomes corresponding defects, is a developing direction of karyonide system.Make the nonmetal stake nuclear of personalized integrated homogeneous and can only make the completion of (CAD/CAM) technological cutting material embryo piece through computer-aided design (CAD)/area of computer aided.

Develop many covers computer-aided design (CAD)/area of computer aided at present abroad and made the making that (CAD/CAM) system is applied to dummies such as Buccodental complete crown, fixed bridge, inlay, veneer gradually; But the dummy dummy model of its computer-aided design (CAD) is an encapsulation of data, can not import open area of computer aided and make numer centre.There is the scholar to report and after producing die, perfusion plaster cast, making wax pattern, does 3-D scanning completion digitizing wax pattern; Final cut generates personalized integrated nonmetal stake nuclear; But this technology does not comprise the computer-aided design (CAD) step; And operating process is loaded down with trivial details, needs the cooperation of model room, and the error risk increases.There is the scholar to attempt the trouble tooth to be carried out tomoscan and sets up three dimensional virtual models through spiral CT; But because CT scan interlamellar spacing excessive (0.5mm); It is not enough to generate the three-dimensional data precision; Can not satisfy the accuracy requirement that clinical stake nuclear is repaired, and the CT scan cost is high, the patient is also had the risk of radiolesion.

Gordian technique of the present invention is following two aspects: routine clinical silicone rubber impression scanning is accomplished the digitizing of denture and damaged tooth through the high-precision optical scanner; Combine to suffer from the tooth own characteristic through computer aided design software; From database, select suitable hat check figure certificate and suffer from the splicing of canalis radicis dentis and defect of teeth profile data, handle, generation can import the auxiliary stake nuclear three-dimensional data of making numer centre of open computer.

[summary of the invention]

The object of the invention is exactly the weak point that exists in the above-mentioned prior art in order to solve; The integrated nonmetal stake nuclear of a kind of personalization method that computer-aided design (CAD) is made is provided, and the dummy precision of using this method to obtain is high, and patient's consultation time is short; Simple operation, with low cost.

The present invention realizes through following technical proposals: the computer-aided design (CAD) method for making of the personalized integrated nonmetal stake nuclear of dental comprises following steps:

The conventional reparation of step (1) designed, and tooth preparation is produced the full denture silicone rubber impression that comprises trouble canalis radicis dentis and defect of teeth fracture morphology;

Step (2) is used the silicone rubber impression of producing in the optical scanner scanning step (1), obtains the three-dimensional data of suffering from canalis radicis dentis and defect of teeth section and complete denture;

Step (3) is based on hat nuclear relatively and suffer from the similarity degree of the same denture offside tooth of the same name of tooth, from the hat nuclear data depositary of having set up for suffer from tooth select the similarity soprano of offside tooth of the same name corresponding hat nuclear three-dimensional data;

Step (4) is passed through computer aided design software; The splicing of three-dimensional data is examined in completion to the hat of suffering from the selection of canalis radicis dentis and defect of teeth section three-dimensional data and step (3); And according to the shape of adjacent teeth, arrange stake nuclear carried out the adjustment on form and the direction, the final generation is applicable to that repairing the personalized integrated stake of suffering from tooth examines dummy model;

Step (5) digital control processing: the personalized integrated stake nuclear dummy model data importing area of computer aided that will set up is made numer centre, selects suitable processing stock, examines thing through the integrated nonmetal stake of the useful clinically personalization of numerical control cutting processing and fabricating.

In above-mentioned steps (2), said scanning device is the high-precision optical scanner, and scanning accuracy is superior to 0.02mm.

In above-mentioned steps (4), the personalized integrated stake nuclear dummy model storage format of generation is the STL form.

In above-mentioned steps (5), stock is chosen as and is applicable to that area of computer aided makes nonmetallic materials such as the quartz fibre of cut, spun glass, zirconia.

The invention has the beneficial effects as follows: (1) patient's prescription on individual diagnosis cycle is short, and is simple and efficient to handle.Clinically can directly scan after producing silicone rubber impression, omit perfusion plaster cast and the skilled worker chamber operation steps of making wax pattern, shorten the fabrication cycle of stake nuclear.Through the support of hat nuclear data depositary, the later stage computer-aided design (CAD) is easy and simple to handle.(2) safe and reliable, precision is high.Accomplish the denture impression scanning through high-precision optical scanner (scanning accuracy is superior to 0.02mm), improved precision, harmless to the patient, and omitted perfusion plaster cast and the skilled worker chamber operation steps of making wax pattern, reduced the error risk.(3) generate open type data.Dummy model is examined in the personalized integrated stake that generates the STL form through computer-aided design (CAD), can import the auxiliary numer centre of making of open computer and carry out cut.

[description of drawings]

Figure one: the process chart that is the computer-aided design (CAD) method for making of the personalized integrated nonmetal stake nuclear of dental of the present invention

Figure two: utilize computer-implemented method tooth canal three-dimensional data and the splicing of hat nuclear three-dimensional data, processing, generate and be applicable to that repairing the personalized integrated stake of suffering from tooth examines dummy model.

Figure three: examining thing through the personalized integrated nonmetal stake of numerical control cutting manufacturing process making can reach desirable adaptation with the trouble canalis radicis dentis.

[embodiment]

Below in conjunction with accompanying drawing, the present invention is done further detailed description, shown in figure one, the technological process of the computer-aided design (CAD) method for making of the personalized integrated nonmetal stake nuclear of this dental is:

Step (1): clinical die produces 1; Routine is repaired design and tooth preparation, produces to comprise the full denture silicone rubber impression of suffering from canalis radicis dentis and defect of teeth fracture morphology;

Step (2): the die 3-D scanning obtains data 2; Use the full denture silicone rubber impression of producing in high-precision optical scanner (scanning accuracy the is superior to 0.02mm) scanning step (1), obtain the three-dimensional data of suffering from canalis radicis dentis and defect of teeth section and complete denture, and set up virtual three-dimensional model;

Step (3): hat nuclear selects 3; From the hat nuclear data depositary of having set up, select to be applicable to the hat nuclear three-dimensional data of suffering from tooth; The selection of hat nuclear three-dimensional data is through hat nuclear relatively and suffers from the similarity degree of the same denture offside tooth of the same name of tooth, for suffer from tooth select the similarity soprano of offside tooth of the same name corresponding hat check figure certificate;

Step (4): computer-aided design (CAD) 4; Shown in figure two; Accomplish suffering from splicing, the processing of canalis radicis dentis and defect of teeth section three-dimensional data and hat nuclear three-dimensional data through computer aided design software; And according to the shape of suffering from the tooth adjacent teeth, arrange stake nuclear carried out the adjustment on form and the direction, the final generation is applicable to that repairing the personalized integrated stake of suffering from tooth examines dummy model, storage format is the STL form;

Step (5): digital control processing 5; The personalized integrated stake nuclear dummy model data importing area of computer aided of having set up is made numer centre; Selection is applicable to that area of computer aided makes nonmetallic materials stocks such as the quartz fibre of cut, spun glass, zirconia; Examine thing through making of numerical control cutting process technology and the personalized integrated nonmetal stake of suffering from the canalis radicis dentis driving fit, effect is shown in figure three.

The above only is preferred embodiment of the present invention, is not the present invention is done any pro forma restriction; Though the present invention discloses as above with preferred embodiment; Yet be not in order to limiting the present invention, anyly be familiar with the professional and technical personnel, in the scope that does not break away from technical scheme of the present invention; When the technology contents of above-mentioned announcement capable of using is made a little change or is modified to the equivalent embodiment of equivalent variations; In every case be not break away from technical scheme content of the present invention, to above any simple modification, equivalent variations and modification that embodiment did, all still belong in the scope of technical scheme of the present invention according to technical spirit of the present invention.

Claims (5)

1. a tooth section is clinical in personalized integrated nonmetal stake nuclear computer-aided design (CAD) method for making, it is characterized in that comprising following steps:

Step (1): the conventional reparation designed, and tooth preparation is produced the full denture silicone rubber impression that comprises trouble canalis radicis dentis and defect of teeth fracture morphology;

Step (2): use the silicone rubber impression of producing in the optical scanner scanning step (1), obtain the three-dimensional data of suffering from canalis radicis dentis and defect of teeth section and complete denture;

Step (3): based on hat nuclear relatively and suffer from the similarity degree of the same denture offside tooth of the same name of tooth, from the hat nuclear data depositary of having set up for suffer from tooth select the similarity soprano of offside tooth of the same name corresponding hat nuclear three-dimensional data;

Step (4): through computer aided design software; The splicing of three-dimensional data is examined in completion to the hat of suffering from the selection of canalis radicis dentis and defect of teeth section three-dimensional data and step (3); And according to the shape of adjacent teeth, arrange stake nuclear carried out the adjustment on form and the direction, the final generation is applicable to that repairing the personalized integrated stake of suffering from tooth examines dummy model;

Step (5): the personalized integrated stake nuclear dummy model data importing area of computer aided that will set up is made numer centre, selects suitable processing stock, examines thing through the integrated nonmetal stake of the useful clinically personalization of numerical control cutting processing and fabricating.

2. the integrated nonmetal stake nuclear computer-aided design (CAD) method for making of personalization according to claim 1 is characterized in that said scanning device is the high-precision optical scanner in the step (2), and scanning accuracy is superior to 0.02mm.

3. the integrated nonmetal stake nuclear computer-aided design (CAD) method for making of personalization according to claim 1 is characterized in that in the step (4) that the personalized integrated stake nuclear dummy model storage format of generation is the STL form.

4. the integrated nonmetal stake nuclear computer-aided design (CAD) method for making of personalization according to claim 1 is characterized in that in the step (5) that stock is chosen as the nonmetallic materials that are applicable to area of computer aided making cut.

5. the integrated nonmetal stake nuclear computer-aided design (CAD) method for making of personalization according to claim 4 is characterized in that described nonmetallic materials are quartz fibre, spun glass, zirconia.

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