CN113499152B

CN113499152B - Machining process of pre-collision clearance retainer

Info

Publication number: CN113499152B
Application number: CN202110590311.8A
Authority: CN
Inventors: 严斌; 李林; 易立
Original assignee: Nanjing Jingyi Denture Co ltd; Affiliated Stomatological Hospital of Nanjing Medical University
Current assignee: Nanjing Jingyi Denture Co ltd; Affiliated Stomatological Hospital of Nanjing Medical University
Priority date: 2021-05-28
Filing date: 2021-05-28
Publication date: 2022-08-09
Anticipated expiration: 2041-05-28
Also published as: CN113499152A

Abstract

The invention relates to a processing technology of a pre-collision clearance retainer, which comprises the steps of selecting a model; the process of manufacturing the retainer comprises the following steps: model finishing, tooth arrangement simulating, space reserving, model scanning, digital wax pattern manufacturing, data processing, data slicing, 3D printing, finished product taking out, heat treatment and polishing; the digital pre-abutting space keeper does not need to slice the near-gap side of the adjacent tooth; the contact degree and the stability are better; the contact point of the tooth paste and the adjacent tooth is more closely attached, so that the generation of secondary caries is reduced; the rigidity of the used material is better; the occlusion baffle can play a role in preventing the extension of the jaw teeth.

Description

Machining process of pre-collision clearance retainer

Technical Field

The invention relates to the technical field of false tooth auxiliary equipment processing, in particular to a processing technology of a pre-interference clearance retainer.

Background

A fixed denture is a prosthesis that repairs one or several missing teeth in the dentition. The artificial tooth is connected with the prepared abutment or implant on the two sides of the missing tooth by an adhesive or a fixing device, thereby restoring the anatomical form and the physiological function of the missing tooth. Because the prosthesis patient can not take and wear by oneself, fix the false tooth for short.

The conditions of tooth falling and the like of a patient are different from person to person, and the subsequent false tooth processing and wearing can not be finished through a unified standard part, so that a pre-conflict gap retainer required by the false tooth is distinct; the invention provides a pre-interference space retainer which has flexible and excellent characteristics through customizing the retainer in the later period of the oral cavity condition of a patient, and the practicability of the pre-interference space retainer is enhanced compared with the traditional wire-ring type fixed gap retainer.

Disclosure of Invention

In order to solve the problems, the invention discloses a processing technology of a pre-conflict space retainer, which can avoid the need of slicing the near-gap side of adjacent teeth, has good fitting degree and stability, can be matched with teeth to be closely attached to a framework thereof, reduces the generation of subsequent decayed teeth, has high structural strength and prevents the elongation of jaw teeth.

In order to achieve the above object, the present invention provides a process for machining a pre-abutting lash adjuster, which is characterized by comprising the following steps:

the method comprises the following steps: taking a model of a patient tooth gap model, selecting a reverse model from a gap between an anterior molar region and a molar region of a patient in a tooth replacing period of the patient;

step two: fabricating a retainer comprising:

model finishing: the worker trims the edges of the selected gap gypsum model through a gypsum model trimming machine to achieve the effects of later-stage occlusion use and manufacture;

tooth arrangement simulating: arranging a resin tooth or a wax tooth at a position to be erupted in the oral cavity on the gap plaster model according to the occlusion relation of a patient, performing tooth arrangement simulation according to the gap, and determining an occlusion contact plane when tooth arrangement simulation is performed;

reserving space: the occlusion is integrally reduced to be an empty opening 2 mm, and a gap of 0.6 mm-1.0 mm is reserved between the simulated tooth arrangement and the ring-shaped base tooth;

model scanning: scanning the working model according to the teeth, and obtaining a corresponding data model for the jaw model and the occlusion relation;

digital wax pattern production: the data model obtained in the last step is designed to ensure that the thickness of the belt ring is 0.6-1.0mm, the lower edge of the belt ring is 0.5mm away from the gingival margin, and the upper edge of the belt ring does not exceed the maxillofacial area and does not influence occlusion; the occlusion baffle plate horizontally extends to the far middle surface of the adjacent tooth beyond the occlusion surface of the simulated tooth row along the vertex of the near deletion position of the belt ring, the whole occlusion baffle plate is uniformly lower than the occlusion contact surface by 1mm according to the occlusion relation, the thickness of the occlusion baffle plate is 1mm, and the width of the occlusion baffle plate is 2/3 of the buccolingual diameter of the adjacent tooth;

data processing: importing the data model of the gap simulator obtained by the design in the last step into data processing software, adding supports for data, adjusting the direction and height of the data, reasonably planning the position arrangement of the data, selecting the support strength and the support density to ensure the printing effect, and exporting the data after the processing is finished;

slicing data: after the data processing is finished, slicing processing is needed, three-dimensional modeling is used as printing data of a two-dimensional plane in software, the thickness of a slice layer, the printing power, the printing speed and the printing mode are adjusted in the slicing software, and the data are exported after the data processing is finished;

3D printing and prefabricating: leading in the printing apparatus with the data after the completion of cutting into slices, open the data that need print at operation interface, place the data file in the printing area, then prepare equipment to printable state again, the preparation process needs to install the base plate in the printing area, and with the base plate leveling, make base plate and print platform parallel, supply powder region and provide sufficient metal powder, open the circulation of washing gas, make oxygen content reduce to printable's condition within range, open the ventilation, in order to guarantee to print the in-process, can blow away the powder waste residue that splashes, guarantee to print regional being heated stably. Starting printing after the preparation is finished;

taking out a finished product: after printing is finished, cleaning the printing equipment, collecting and recycling redundant powder in the printing equipment, and then taking out the substrate;

and (3) heat treatment: and placing the finished product in a vacuum heating furnace or a vacuum tube furnace under the condition of keeping the finished product on the substrate, ensuring that the finished product is in the inert gas protection in the heating process, selecting the heat treatment process of the corresponding material, and performing heating and heat preservation treatment, wherein the process aims to remove stress and deform when the finished product is placed and taken down. After the heat treatment is finished, taking out the substrate after the furnace temperature is reduced, and putting the substrate and the finished product into a sand blasting machine after the temperature of the substrate and the finished product is reduced;

grinding and polishing: grinding and polishing: the surface is sand blasted to remove the surface oxide film, so that the bonding effect is enhanced; and cutting off the support, trimming the appearance, then grinding, firstly performing rough grinding, then performing fine grinding, and finally polishing.

Drawings

Fig. 1 is a view showing an effect of assembling a retainer in a process of manufacturing a pre-interference space retainer.

With the above description, compared to the prior art, the digital pre-abutment space keeper does not require the adjacent tooth near-lacunae side of the slice cut; the contact degree and the stability are better; the contact point of the tooth paste and the adjacent tooth is more closely attached, so that the generation of secondary caries is reduced; the rigidity of the used material is better; the occlusion baffle can play a role in preventing the jaw teeth from extending.

Detailed Description

The present invention will be further illustrated with reference to the accompanying drawings and specific embodiments, which are to be understood as merely illustrative of the invention and not as limiting the scope of the invention. It should be noted that the terms "front," "back," "left," "right," "upper" and "lower" used in the following description refer to directions in the drawings, and the terms "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.

Compared with the prior art:

the invention relates to a processing technology of a pre-collision clearance retainer, which comprises the following steps:

step two: fabricating a holder, comprising:

and (3) observing a model: after the corrected gypsum model is obtained, determining a positioning channel and filling the undercut by using an observation instrument;

copying the model: copying a fire-resistant model, performing one-to-one monomer copying through the compared gypsum model, and selecting the fire-resistant model with the best texture as a subsequent processing object after completing the copying of a proper amount of models;

tooth arrangement simulating: fitting the selected fire-resistant model to a model upper jaw frame, performing tooth arrangement simulation according to gaps, and determining an occlusion contact plane when tooth arrangement simulation is performed;

transfer design: transferring the design on the refractory mold to a phosphate mold;

preparing a wax pattern: the wax pattern is manufactured for the purpose of improving the structural strength of the phosphate model, the thickness of a ring belt in the originally manufactured phosphate model is detected, the thickness of a retainer is 0.6-1mm, the distance between the lower end edge of the ring belt and the gingival edge is 0.5mm, and the upper end edge of the ring belt cannot exceed the maxillofacial surface and the occlusion is not influenced; the occlusion baffle horizontally extends to the far-middle surface of the adjacent tooth along the top point of the near missing position of the belt ring, the whole occlusion baffle is lower than the occlusion contact surface by at least 1mm, the thickness of the occlusion baffle is 1mm, and the width of the occlusion baffle is two thirds of the buccolingual diameter of the adjacent tooth;

embedding: inserting a casting channel, removing tension on the surface of the wax pattern before embedding, adjusting the water-powder ratio of an embedding material, adding the adjusted embedding material into a vacuum air-conditioning mixer according to the water-powder ratio of 100:15, stirring for 60 seconds, and slowly injecting the embedding material into a vibrating machine;

casting: after the embedding is completely dried, putting the mixture into a Maofu furnace for baking for 30-60 minutes, and then putting the mixture into a centrifugal casting machine for casting;

opening a ring: after the casting is finished, the cast steel is cooled at room temperature in the cooling process, and the cast steel cannot be directly put into cold water for cooling; and opening the ring after complete cooling, and removing the embedding material.

Grinding and polishing: grinding and polishing: the surface is sand blasted to remove the surface oxide film, so that the bonding effect is enhanced; and cutting off the casting channel, trimming the appearance, then grinding, firstly performing rough grinding and then performing fine grinding, and finally polishing.

The invention relates to a processing technology of a pre-interference clearance retainer, which is characterized by comprising the following steps:

step two: fabricating a holder, comprising:

model scanning: scanning the working model according to the teeth, and obtaining a corresponding data model for the occlusion model and the occlusion relation;

data processing: importing the data model of the gap simulator obtained in the last step into data processing software, adding supports for data, adjusting the direction and height of the data, reasonably planning the position arrangement of the data, selecting the support strength and the support density to ensure the printing effect, and exporting the data after the processing is finished;

3D printing and pre-making: leading in the printing apparatus with the data after the completion of cutting into slices, open the data that need print at operation interface, place the data file in the printing area, then prepare equipment to printable state again, the preparation process needs to install the base plate in the printing area, and with the base plate leveling, make base plate and print platform parallel, supply powder region and provide sufficient metal powder, open the circulation of washing gas, make oxygen content reduce to printable's condition within range, open the ventilation, in order to guarantee to print the in-process, can blow away the powder waste residue that splashes, guarantee to print regional being heated stably. Starting printing after the preparation is finished;

and (3) heat treatment: and placing the finished product in a vacuum heating furnace or a vacuum tube furnace under the condition of keeping the finished product on the substrate, ensuring the finished product to be in inert gas protection in the heating process, selecting the heat treatment process of the corresponding material, and carrying out heating and heat preservation treatment, wherein the process is used for removing stress and placing the finished product to deform when being taken down. After the heat treatment is finished, taking out the substrate after the furnace temperature is reduced, and putting the substrate and the finished product into a sand blasting machine after the temperature of the substrate and the finished product is reduced;

grinding and polishing: grinding and polishing: sand blasting the surface to remove the surface oxide film and enhance the bonding effect; and cutting off the support, trimming the appearance, then grinding, firstly performing rough grinding, then performing fine grinding, and finally polishing.

In summary, the following steps:

after the steps of tooth arrangement and tooth arrangement are compared, the data scanning technology of the scheme of the invention is adopted and matched with the later retainer processing production, the precision of the fixed gap retainer produced by data simulation is higher than that of the fixed gap retainer processed by hand, and the produced and processed fixed gap retainer can be more closely attached to the adjacent tooth; the situations that the retainer is loosened, food remains and the health of teeth is damaged in the later food eating or chewing process of a patient are avoided; indirectly prevent the caries of adjacent teeth. Most prominently, the occlusion baffle can play a role in preventing the stretching of the jaw teeth.

The technical means disclosed in the invention scheme are not limited to the technical means disclosed in the above embodiments, but also include the technical scheme formed by any combination of the above technical features.

Claims

1. A machining process of a pre-abutting clearance retainer is characterized by comprising the following steps of:

step two: fabricating a holder, comprising:

model trimming: the worker trims the edges of the selected gap gypsum model through a gypsum model trimming machine to achieve the effects of later-stage occlusion use and manufacture;

preparing tooth arrangement: arranging a resin tooth or a wax tooth at a position to be erupted in the oral cavity on the gap plaster model according to the occlusion relation of a patient, performing tooth arrangement simulation according to the gap, and determining an occlusion contact plane when tooth arrangement simulation is performed;

and thirdly, reserving space: the whole body is reduced to be occluded to be 2 mm, and a gap of 0.6 mm-1.0 mm is reserved between the tooth arrangement and the abutment with the ring;

fifth, manufacturing a digital wax model: designing on the data model obtained in the fourth step, ensuring that the thickness of the belt ring is 0.6-1.0mm, the lower edge of the belt ring is 0.5mm away from the gingival margin, and the upper edge of the belt ring does not exceed the maxillofacial area and does not influence occlusion; the occlusion baffle plate horizontally extends to the far middle surface of the adjacent tooth beyond the occlusion surface of the simulated tooth row along the vertex of the near deletion position of the belt ring, the whole occlusion baffle plate is uniformly lower than the occlusion contact surface by 1mm according to the occlusion relation, the thickness of the occlusion baffle plate is 1mm, and the width of the occlusion baffle plate is 2/3 of the buccolingual diameter of the adjacent tooth;

data processing: importing the data model file of the space maintainer obtained by the design in the fifth step into data processing software, adding supports for data, adjusting the direction and the height of the data, reasonably planning the position arrangement of the data, selecting the support strength and the support density to ensure the printing effect, and exporting the data after the processing is finished;

data slicing: after the data processing is finished, slicing processing is needed, three-dimensional modeling is used as printing data of a two-dimensional plane in software, the thickness of a slice layer, the printing power, the printing speed and the printing mode are adjusted in the slicing software, and the data are exported after the data processing is finished;

preparing in advance a 3D printing method: the method comprises the steps of guiding sliced data into printing equipment, opening the data to be printed on an operation interface, placing a data file in a printing area, preparing the equipment to be in a printable state, installing a substrate in the printing area in the preparation process, leveling the substrate to enable the substrate to be parallel to a printing platform, providing enough metal powder in a powder supply area, opening a gas washing cycle to reduce the oxygen content to be within a printable condition range, opening ventilation to ensure that splashed powder waste residues can be blown away in the printing process, ensuring that the printing area is heated stably, and starting printing after the preparation is finished;

ninthly, taking out finished products: after printing is finished, cleaning the printing equipment, collecting and recycling redundant powder in the printing equipment, and then taking out the substrate;

heat treatment in r: placing the finished product in a vacuum heating furnace or a vacuum tube furnace under the condition of keeping the finished product on the substrate, ensuring the finished product to be in inert gas protection in the heating process, selecting the heat treatment process of the corresponding material, and carrying out heating and heat preservation treatment, wherein the process is used for removing stress and placing the finished product to deform when being taken down; after the heat treatment is finished, taking out the substrate after the furnace temperature is reduced, and putting the substrate and the finished product into a sand blasting machine after the temperature of the substrate and the finished product is reduced;

⑪ grinding and polishing: the surface is sand blasted to remove the surface oxide film, so that the bonding effect is enhanced; and cutting off the support, trimming the appearance, grinding, roughly grinding, finely grinding and polishing.