WO2015008893A1 - Semi-custom dental implant prosthesis production method having simplified production process - Google Patents

Abstract

The present invention provides a dental implant prosthesis production method comprising: a model preparation step for preparing a plaster model, and a wax-up model in the form of a final prosthesis by obtaining data from the oral environment of a patient; a wax-up model scanning step for obtaining data on the three-dimensional stereoscopic shape of the final prosthesis by three-dimensionally scanning the wax-up model; an abutment and upper prosthesis design step for configuring semi-custom abutment shape design data and upper prosthesis design data by using the data on the three-dimensional stereoscopic shape of the final prosthesis; and a semi-custom abutment processing step for processing a semi-custom abutment by conducting a CAM process using the configured semi-custom abutment shape data.

Description

Semi-Custom Dental Implant Prosthetics Made Simple

The present invention relates to a method for manufacturing a dental implant prosthesis, and more particularly to a method for manufacturing a semi-custom dental implant prosthesis by simplifying the manufacturing process by designing using a ready-made abutment library.

In general, an implant is a replacement that is originally restored when human tissue is lost, but in dentistry, an artificial tooth replacement is placed, more specifically in place of a lost root (root). In order to restore the function of the tooth by planting the tooth root made of titanium (titanium), which has no rejection reaction to the human alveolar bone, the artificial tooth is fixed.

In the case of general prosthetics or dentures, the surrounding teeth and bones will be damaged over time, but dental implant prostheses will not damage the surrounding dental tissues. have.

The dental implant prosthesis procedure performed in the dentistry is divided into a surgical process of embedding a fixture in the gum bone, that is, the alveolar bone, and a prosthetic process of connecting abutment to the planted fixture to install a tooth substitute.

There may be a variety of methods for treating such dental implant prostheses, one example of which will be described below. The dental implant prosthesis procedure described below is a fixture level impression method for completing an intraoral model by connecting impression copings in the oral cavity when the impression is taken in the prosthetic process.

First, grooves matching the fixture dimensions are formed by drilling and tapping the alveolar bone, and then mounting a mount on the upper portion of the fixture. The implant is then embedded in the alveolar bone by using the surgical hand piece to embed the fixture and mount in the alveolar bone and then remove the mount from the fixture.

The first operation is completed by fastening the cover screw to the upper part of the fixture to seal the fixture.

The cover screw blocks bacteria and foreign matter present in the oral cavity from entering the fixture while waiting for the fusion of the fixture. Bone fusion periods vary somewhat depending on the bone quality and location of the patient, but generally take three to six months.

Subsequently, open the gum to expose the cover screw through the second operation, check the degree of bone fusion of the fixture, and remove the cover screw. Then heal healing abutment (Healing Abutment) to the top of the fixture for aesthetic gum formation, and wait for two to three weeks. In recent years, in order to improve the complexity of the second procedure, a first procedure of directly fastening the healing abutment and eliminating the process of fastening and removing the cover screw may be used.

Next, after confirming aesthetic gum formation, the healing abutment is removed, and an impression coping is fastened to the upper portion of the fixture to produce a prosthesis. The impression material is then used to take a preliminary impression in the oral cavity and to remove the impression coping.

Thereafter, a tooth model is manufactured and an artificial tooth, that is, an artificial crown, is processed, and then abutments are fastened to the upper part of the fixture, and the upper prosthesis (ie, a crown) is fixed on the abutment to complete the implant prosthesis.

An object of the present invention in the design of the abutment to make a custom design above the margin on the basis of the margin, the bottom cuff to be automatically generated in the tapered shape, thereby reducing the effort required for the design and manufacture of the abutment and the upper prosthesis It is to provide a method for manufacturing a dental prosthesis that can reduce the time.

Another object of the present invention is to provide a dental prosthesis manufacturing method that can reduce the number of visits and treatment period of the patient by collectively designing and manufacturing the upper prosthesis and abutment of the dental implant prosthesis.

The present invention provides a model preparing step of obtaining information from the oral environment of the patient to prepare a plaster model and a wax-up model in the form of a final prosthesis; Performing a three-dimensional scan of the wax-up model to obtain three-dimensional solid shape data of the final prosthesis; An abutment and upper prosthesis design step of setting semi-customized abutment shape design data and upper prosthesis design data using the three-dimensional three-dimensional shape data of the final prosthesis; It provides a dental implant prosthesis manufacturing method comprising a; and semi-custom abutment processing step of processing a semi-custom abutment by performing a cam processing from the set semi-custom abutment shape data.

In the abutment and upper prosthesis design step, the abutment cuff shape is preferably to be automatically generated in a tapered shape.

In addition, in the abutment and upper prosthesis design step, the abutment design is to select the standard of the round bar to be used for processing, it is preferable to design the shape above the margin margin within the range.

Alternatively, the abutment and upper prosthesis design step may be set by selecting a shape selected from a preset ready rent column shape library within a preset changeable range.

At this time, it is preferable that the changeable range is the height of the post and the angle of the post.

In the design of the abutment and the upper prosthesis, when the design of the abutment is set, it is desirable to determine the cavity design of the upper prosthesis accordingly.

In the semi-custom abutment processing step, it is preferable to process the post and the margin by using a pre-processed material.

At the same time as or after the semi-custom abutment processing step, the method may further include an upper prosthesis processing step of processing the upper prosthesis from the set upper prosthesis shape data.

It is preferable that the gypsum model provided in the model preparing step includes an immersion profile shape selected from a ready-made healing abutment shape.

The present invention transforms the library of ready rents to design the rents, thereby reducing the effort required to design and reducing the time to manufacture the rents and upper prostheses.

In addition, the present invention enables to design and manufacture the upper prosthesis and the abutment of the dental implant prosthesis collectively, bringing the effect of reducing the number of visits and the treatment period of the patient.

1 is a view schematically showing the external structure and internal structure of the dental implant prosthesis,

Figure 2 is a flow chart showing a semi-custom dental implant prosthesis manufacturing method simplified the manufacturing process according to an embodiment of the present invention,

3 is a view showing the height adjustment range of the post,

4 is a view showing an angle adjustment range of the post.

5 is a view showing a pre-processing material used in the implant prosthesis manufacturing method according to an embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings will be described in detail with respect to a method for manufacturing a semi-custom dental implant prosthesis simplified the manufacturing process according to an embodiment of the present invention.

1 is a view schematically showing the external structure and internal structure of the dental implant prosthesis.

As shown, the dental implant prosthesis is the fixture 110 is inserted into the alveolar bone, the abutment 120 fastened to the fixture 110, and the abutment 120 is wrapped to form the appearance of the final dental implant prosthesis It includes an upper prosthesis 130 to. The upper prosthesis 130 may also be referred to as a crown, and in the present invention, the term upper prosthesis is used.

In consideration of the aesthetic and functional aspects, the upper prosthesis 130 is made of a precious metal alloy containing gold (Au) or a non-precious or semi-precious metal alloy containing no gold, a ceramic material, a precious metal, It can be manufactured using various dental materials such as non-noble or semi-precious metals and ceramics.

Specific materials include zirconia and PFM. PFM (Pocelain Fused Metal) is an aesthetic prosthesis made by melting porcelain on a metal tube. It is less expensive than gold-based PFG or titanium-based PFT, and has a tooth-like color.

The appearance of the upper prosthesis 130 is determined by data such as the tooth shape of the patient and the shape of the occlusal antagonist.

The inner surface shape of the upper prosthesis 130 corresponds to the outer shape of the abutment 120. This is to secure the coupling force of the abutment 120 and the upper prosthesis 130.

The present invention is to simplify the process of manufacturing the prosthesis by designing and processing a semi-custom abutment. From this, the effect that can shorten the healing period of a patient is anticipated.

Figure 2 is a flow chart illustrating a semi-custom dental implant prosthesis manufacturing method simplified the manufacturing process according to an embodiment of the present invention.

The implant prosthesis manufacturing method according to the present invention comprises obtaining a gypsum model and a wax-up model in the form of a final prosthesis by obtaining information from the oral environment of the patient (S-21), and the wax-up model three-dimensional A wax-up model scan step (S-22) of scanning to obtain three-dimensional solid shape data of the final prosthesis, semi-custom abutment shape design data and upper prosthesis design data using the three-dimensional solid shape data of the final prosthesis The abutment and the upper prosthesis design step (S-23) to set and a semi-custom abutment processing step (S-24) for processing a semi-custom abutment by performing a cam processing from the set semi-custom abutment shape data.

Each step will be described in more detail below.

Model preparation step (S-21) is a step of preparing a plaster model corresponding to the oral environment of the patient and the wax-up model in the form of the final prosthesis.

The gypsum model can be made using an impression model acquired from a patient or a 3D oral scan file.

Gypsum models include the shape of an immersion profile, which is the shape of the gum around the ankle.

Since the immersion profile shape can be adjusted to some extent using the healing abutment, it is desirable to include an emergence profile in the gypsum model that corresponds to the shape of the healing abutment to be used or used.

The emergency profile shape relates to the abutment cuff shape described later, and more details will be described later.

The shape of the wax-up model in the form of the final prosthesis is determined by data such as the tooth shape of the patient and the shape of the occlusal antagonist.

The model scan step (S-22) is a step of three-dimensional scanning of the wax-up model, digitalizing the three-dimensional solid shape of the final prosthesis, and acquiring the data.

The 3D three-dimensional shape data of the final prosthesis thus obtained is used to design the shape of the abutment and the upper prosthesis.

The abutment and upper prosthesis design step S-23 is a process of designing the shape of the abutment and the upper prosthesis using the three-dimensional solid shape data of the final prosthesis obtained in the model scan step S-22.

At this time, the abutment design may be completed by selecting a specific shape from a preset ready abutment shape library and selecting the shape from a changeable range.

Alternatively, take information about the shape of the healing abutment that has been placed in the patient, generate the abutment cuff design using the shape information, and select the post shape above the generated cuff design in a changeable range. By doing so, you can complete the rent design. In this case, the cuff design basically has a tapered shape, and the tapered surface may be formed convexly or concavely.

The shape of the upper prosthesis is composed of an outer surface shape corresponding to the appearance of the final prosthesis, and a cavity shape of the portion engaged with the abutment. In the case of the outer shape, it is determined by using three-dimensional three-dimensional shape data of the final prosthesis obtained in the model scanning step, and in the case of the cavity shape, it is determined to secure a predetermined distance from the abutment shape.

According to the present invention, in designing the abutment shape, the post portion of the upper margin based on the margin performs a custom design, and the cuff portion below the margin is automatically generated, thereby reducing the effort required for the abutment design.

Alternatively, in designing the abutment shape, the present invention starts with a preselected library selection shape or abutment preliminary shape created using the shape information of the healing abutment, thereby modifying the design. As a result, it can be said that it is a semi-customized renter that is halfway between the customized renter and the ready renter.

In addition, the abutment design is preferably selected from the specifications of the pre-processing material to be used for the processing, and design the shape within that range.

Here, the abutment preliminary shape generated by using the shape information of the healing abutment means that the shape of the cuff has a taper shape that is automatically generated by using the size and shape information of the healing abutment, and the post is formed according to the cross-sectional size of the cuff. It means an automatically generated form.

When the design is completed, the shape data of the abutment and the shape data of the upper prosthesis can be obtained. Using this data, a cam machining is performed in the abutment processing step (S-24) to produce a semi-custom abutment.

Additionally, the method may further include an upper prosthesis processing step of processing the upper prosthesis from the set upper prosthesis shape data at the same time as or after the semi-custom abutment processing step.

In the abutment and upper prosthesis design stage, the 3D solid shape of the final prosthesis is implemented and displayed from the 3D solid shape data of the final prosthesis.

Dividing the three-dimensional solid shape of the final prosthesis into abutment and top prosthesis becomes the design stage of the abutment and top prosthesis.

The abutment consists of a cuff associated with the immersion profile shape, a post and a chamfer associated with the joining of the upper prosthesis, and the present invention stores a ready-made abutment library in advance and stores it in the three-dimensional conformation of the final prosthesis. The design starts with the selection of a ready-made abutment shape.

The abutment cuff shape is preferably set in advance. The cuff should have a shape corresponding to the immersion profile, which will follow the shape of the healing zone column. The renter's cuff shape eventually has the same shape as the healing renter's cuff shape.

The cuff shapes of the abutments stored in the existing abutment library become shapes corresponding to those of the healing abutment.

The cuff shape does not change during the design process, and the shape of the cuff is determined by selecting a ready abutment from the library.

When the ready abutment is selected from the ready abutment library, the shape overlaps with the three-dimensional shape of the final prosthesis and is displayed. In this state, the height and angle of the post can be adjusted, and the shape of the chamfer can be adjusted.

3 shows the height adjustment range of the post, and FIG. 4 shows the angle adjustment range of the post.

Referring to FIG. 3, the height of the post may be selected from a range guide in which the upper prosthesis may be secured to a certain thickness while the chamfer surface may be secured to a certain width.

Referring to FIG. 4, the angle of the post may be limited within a certain angle range. The angle of the post is related to the load subjected to the occlusal pressure, and if it is out of a certain angular range, problems arise in durability, so it is preferable to limit the angle of the post to a certain range.

Referring to Figures 3 and 4, by adjusting the height and angle of the post only in the shape of the ready rent to determine the design of the rent, it is possible to reduce the effort required for the design of the rent, and simplify the shape of the rent This also brings the effect of improving the cavity workability of the upper prosthesis.

As a result, the manufacturing process of the abutment and the upper prosthesis can be simplified, and the bondability of the abutment and the upper prosthesis can be secured.

In addition, by performing the design of the abutment and the upper prosthesis collectively, there is also an effect that can shorten the healing period compared to the preparation of the abutment and the upper prosthesis sequentially.

5 is a view showing a pre-processing material used in the implant prosthesis manufacturing method according to an embodiment of the present invention.

The semi-custom abutment processing step may be used to process the post and the margin by using the pre-processing material 200, the fastening portion 210 and the cuff 220 is processed, but is not limited to this can also use a cut round bar material. have.

The round bar material as shown by the point islands are cut to a certain length, leaving the fastening portion 210 and the cuff 220 and cutting the remaining portion (parts indicated by the point islands) to manufacture the pre-processed material 200.

As described above, the semi-custom abutment according to the present invention is to determine the design by importing the shape from the ready-made abutment library to change the height and angle of the post, the shape of the cuff does not change in the design stage.

Therefore, when the semi-custom abutment processing is performed using the preliminary material processed to the shape of the fastening portion and the cuff fixed to the fixture, it is possible to reduce the time required for semi-custom abutment processing.

Claims (10)

A model preparing step of obtaining information from the oral environment of the patient to prepare a gypsum model and a wax-up model in the form of a final prosthesis; Performing a three-dimensional scan of the wax-up model to obtain three-dimensional solid shape data of the final prosthesis; An abutment and upper prosthesis design step of setting semi-customized abutment shape design data and upper prosthesis design data using the three-dimensional three-dimensional shape data of the final prosthesis; And And a semi custom abutment processing step of processing a semi custom abutment by performing cam processing from the set semi custom abutment shape data. The method of claim 1, In the abutment and upper prosthesis design step, The abutment cuff shape is a dental implant prosthesis manufacturing method characterized in that it is automatically generated in a tapered shape. The method of claim 1, In the abutment and upper prosthesis design step, The abutment design is selected for the specification of the pre-processed material to be used for processing, the dental implant prosthesis manufacturing method, characterized in that for designing the shape within the range. The method of claim 1, In the abutment and upper prosthesis design step, The dental implant prosthesis manufacturing method characterized in that it is set by selecting a shape selected from the preset ready-to-use column shape library in a preset changeable range. The method of claim 1, In the abutment and upper prosthesis design step, A method for manufacturing a dental implant prosthesis, characterized in that it is set by selecting the abutment preliminary shape formed using the shape information of the healing abutment placed in the patient within a preset changeable range. The method of claim 5, In the changeable range mentioned above Dental implant prosthesis manufacturing method, characterized in that the height of the post and the post. The method of claim 1, In the abutment and upper prosthesis design step, And if the design of the abutment is set, the cavity design of the upper prosthesis is determined accordingly. The method of claim 1, The semi-custom abutment processing step Dental implant prosthesis manufacturing method characterized in that the post and the margin by using a pre-processed material. The method of claim 1, At the same time or after the semi custom abutment processing step, Dental implant prosthesis manufacturing method further comprises an upper prosthesis processing step of processing the upper prosthesis from the set upper prosthesis shape data. The method of claim 1, The gypsum model prepared in the model preparation step A dental implant prosthesis manufacturing method comprising an immersion profile shape selected from a ready-made healing zone shape.

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