JPH0763486B2 - Artificial tooth processing method - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a working method for working an artificial tooth such as a crown tooth to be put on a damaged tooth or a bridge tooth to be attached to a partially tooth-free portion.

[0002]

2. Description of the Related Art First, as a method of processing a crown, there is a processing method shown in FIGS. As shown in FIG. 19, for example, a damaged lower tooth is cut into a trapezoidal shape to form an abutment tooth 1, and the abutment tooth 1 and an opposing tooth 2 at an upper portion facing the abutment tooth 1 make it possible to cure at room temperature. The impression material 3 made of resin is pressed to form the abutment tooth impression portion 4 and the opposing tooth impression portion 5 on the lower and upper portions of the impression material 3. Next, as shown in FIG. 20, a model abutment tooth 6 made of gypsum corresponding to the abutment tooth 1 is made by the abutment tooth impression portion 4, and by the opposite tooth impression portion 5 made of gypsum as shown in FIG. The model facing teeth 7 are formed. Then, as shown in FIG. 22, the outer peripheral portion of the model abutment tooth 6 is covered with a solid wax, and the upper portion of the solid wax is pressed by the model facing tooth 7, and the peripheral surface of the solid wax is used by a predetermined device. The tooth shape is finished to form the model crown 8. Next, as shown in FIG. 23, after embedding the model crown 8 in the mold 9, as shown in FIG. 24, the mold 9 is heated to incinerate the model crown 8 and the crown cavity is placed in the mold 9. 10
To form. Next, as shown in FIG. 25, a molding hot water, for example, a molten metal is injected into the crown cavity 10 through the sprue 10a and hardened to form the primary crown 11. Next, as shown in FIG. 26, the primary crown 11 is covered on the above-described model abutment tooth 6, the outer periphery of the primary crown 11 is ground into a predetermined shape by a tool 12, and then buffed to perform polishing as shown in FIG. A crown 13 is formed on the. In addition, such investment
The NC method instead of the
Being developed. That is, using the impression material 3 in the mouth
After collecting the form of entanglement,
Produce a model crown 8 and make a mold based on it.
We have obtained the measurement data for the surface shape. And the crown
If you want to use NC processing machine to make 13,
Processing is performed based on the measurement data of the model crown 8.
(For example, Japanese Patent Laid-Open No. 57-200144).

[0003]

However, the conventional
Information about the alignment of teeth from the mouth using impression material 3
After collecting, make a model tooth crown 8 corresponding to it,
Making mold based on it, measurement for NC processing
It takes a long time to obtain the data, which inconveniences the patient.
I was there. That is, this invention is a tooth profile collected from the mouth of a person.
Of NC processing method adopted to quickly obtain artificial teeth from
The purpose is to eliminate any new problems that occur when entering
It was done.

[0004]

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, the present invention applies a pressing force to an impression material by means of an abutment tooth formed by cutting into a predetermined shape and an opposing tooth facing the abutment tooth, and An abutment tooth impression part and an opposing tooth impression part are formed on the impression material, two model abutment teeth corresponding to the abutment teeth are formed by the abutment tooth impression part, and the outer periphery of one of the model abutment teeth Part is covered with gypsum material, and the outer peripheral surface of the gypsum material is formed into a natural tooth shape corresponding to the opposing tooth impression part to form a model tooth, and the outer peripheral part of the other model abutment tooth and the model tooth The external shape is measured and the measured data is input to the NC processing machine, the NC processing machine processes the inner surface of the processed material based on the measured data of the other model abutment tooth, and based on the measured data of the model tooth. The outer surface of the processed material is machined.

Further, the impression material is clamped by the abutment tooth in which the teeth on both sides of the tooth removal portion are formed by cutting into a predetermined shape and the opposing tooth facing the tooth removal portion and each abutment tooth, to the impression material. An abutment tooth impression portion and an opposing tooth impression portion are formed, and two abutment tooth portions corresponding to the tooth removal portion and abutment tooth are formed by the abutment tooth impression portion, and one model abutment portion is formed. While covering the tooth portion with a plaster material, the outer peripheral surface of the gypsum material is formed into a natural tooth shape corresponding to the opposing tooth impression portion to form a model tooth, and the outer peripheral portion of the other model abutment tooth portion and The outer shape of the model tooth is measured, the measurement data is input to the NC processing machine, and the NC processing machine processes the inner surface of the processed material based on the measurement data of the other model abutment tooth portion, The outer surface of the processed material is machined based on the measured data.

[0006]

[Function] Since the model tooth crown 22 is made of plaster, the impression material 17
By the abutment tooth impression part 18 and the counter tooth impression part 19 by
Then, the molding is easily performed. Two model abutments
One of the teeth 20 is a model crown with a gypsum material on the outer circumference.
Used to make 22 contours. The other one is the perimeter
The shape of the part is measured, and the measured data is inverted and the crown 2
Shape data of the recess that engages with the abutment tooth 1 when cutting 7
It is said that That is, the measurement of the outer shape of the model dental crown 22 and the concave portion
Is measured by using each different type of abutment tooth 20. Yo
Therefore, the shape of the abutment tooth impression portion 4 which forms a concave portion that is difficult to measure is
The measurement is replaced by measuring the outer shape of the model abutment tooth 6.
The model abutment teeth 6 are replaced with gypsum on
It becomes possible to perform in parallel with the work of making the model crown 8.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. In the drawings, FIG. 1 to FIG. 8 are process drawings showing a process of processing a crown constituting a first embodiment. First, the model abutment tooth 20 made of gypsum is formed in the same manner as the conventional one. That is, as shown in FIG. 1, for example, a damaged lower tooth is cut into a trapezoidal shape to form an abutment tooth 15, and the abutment tooth 15 and an upper facing tooth 16 facing the abutment tooth 15 cure at room temperature. The impression material 17 made of a flexible resin is pressed to form the abutment tooth impression portion 18 and the counter tooth impression portion 19 on the lower and upper portions of the impression material 17. Then, as shown in FIG. 2, two plaster model abutment teeth 20 corresponding to the abutment teeth 15 are formed by the abutment tooth impression portion 18.

Next, as shown in FIG. 3, the outer peripheral portion of one model abutment tooth 20a is covered with gypsum, and the upper part of the gypsum is pressed by the model facing teeth 21, and an operator such as a technician uses the outer peripheral surface thereof. Is finished into a natural tooth shape by using a predetermined appliance to form a model tooth crown (model tooth) 22 made of gypsum.
Next, as shown in FIGS. 4 and 5, the tracing stylus 23 is three-dimensionally measured along the peripheral surfaces of the other model abutment tooth 20b and the model tooth crown 22, and the measurement data is NC processing machine (not shown). To enter. In this case, the other model abutment tooth 20
The measured value of b is inverted and input to the NC processing machine as internal surface processing data.

Next, as shown in FIG. 6, a rectangular parallelepiped processed material 24, for example, is fixedly mounted on a mounting table 25a mounted on the table of the NC processing machine, and the NC processing machine is subjected to the inner surface processing data. Is operated to control the movement of the tool 26 to process (a) the inner surface of the work material 24 to form a recess corresponding to the inner shape of the model tooth crown 22 in the work material 24. Next, as shown in FIG. 7, the processing material 24 is inverted and fitted and fixed to the abutment tooth-shaped mounting base 25b, and the NC processing machine is operated according to the measurement data of the model tooth crown 22,
The tool 26 is controlled to move to machine (a) the outer surface of the processed material 24, the peripheral surface of the processed material 24 is formed into a shape corresponding to the outer shape of the model dental crown 22, and then the outer peripheral surface thereof is subjected to buffing or the like. As shown in FIG. 8, it is ground by a grinder (not shown) to form a crown 27 to cover the abutment tooth 15, that is, an artificial tooth.

FIGS. 9 to 16 are process drawings showing a process of working the bridge teeth forming the second embodiment. First, as shown in FIG. 9, for example, the teeth on both sides of the lower tooth removal portion 30 are cut into trapezoids to form abutment teeth 31, and the tooth removal portion 30 and the abutment teeth 31 are opposed to these. With the upper facing teeth 32,
The impression material 33 made of a room temperature curable resin is pressed to form the abutment tooth impression portion 34 and the counter tooth impression portion 35 on the lower and upper portions of the impression material 33. Next, as shown in FIG. 10, the abutment tooth impression portion 34 forms two plaster model abutment teeth portions 36 corresponding to the tooth removal portion 30 and the abutment tooth 31.

Next, as shown in FIG. 11, one model abutment tooth portion 36a is covered with gypsum, and a technician finishes the outer peripheral surface into a natural tooth shape by using a predetermined tool and is made of gypsum. Model bridge teeth (model teeth) 38 are formed. Next, as shown in FIGS. 12 and 13, the tracing stylus 39 is three-dimensionally measured along the peripheral surfaces of the other model abutment tooth portion 36b and the model bridge tooth 38, and this measurement data is measured by an NC processing machine (illustration). Enter in (Omitted). In this case, the measured value of the other model abutment tooth portion 36b is inverted and input to the NC processing machine as inner surface processing data.

Next, as shown in FIG. 14, a metallic work material 40 formed in a rectangular parallelepiped shape is mounted and fixed on a mounting base 41a mounted on the base of the NC processing machine, and the NC processing machine is subjected to the inner surface processing data. Is operated to control the movement of the tool 42 to process (c) the inner surface of the processed material 40.
An uneven portion corresponding to the inner shape of the model bridge tooth 38 described above is formed. Then, as shown in FIG.
0 is reversed and fitted and fixed to the abutment tooth-shaped mounting base 41b,
The NC processing machine is operated according to the measurement data of the model bridge teeth 38, and the tool 42 is controlled to move to control the processing material 4
0 is subjected to outer surface processing (D), the peripheral surface of the processed material 40 is formed into a shape corresponding to the outer shape of the model bridge tooth 38, and then the outer peripheral surface thereof is polished by a polishing machine (not shown) such as a buff. As shown in FIG. 16, bridge teeth 43, that is, artificial teeth, are formed on the tooth removal portion 30 and the abutment teeth 31.

[0013]

As described above, according to the present invention, an abutment tooth and a model tooth made of gypsum are formed by the abutment tooth impression section and the opposing tooth impression section of the impression material, and the abutment tooth and the model tooth are measured. the measurement data input to NC processing machine Te, in forming the artificial tooth and inner surface machining and the outer surface machining workpieces by NC machine based on these measured data, is formed in the impression material
Abutment tooth that is easy to measure
Substituting by measurement, performed in parallel with the work to make the outer shape of the model tooth
Therefore, it is possible to manufacture artificial teeth quickly and accurately.
it can. Also, if you save and store the above measurement data, you can use it.
If the artificial tooth inside is worn or damaged,
By repeatedly using it, mold and measurement work can be performed.
The effect is that the initial artificial tooth can be quickly realized by omitting steps.

[Brief description of drawings]

FIG. 1 is a first process chart of the first embodiment according to the present invention.

FIG. 2 is a second process diagram of the first embodiment according to the present invention.

FIG. 3 is a third step of the first embodiment according to the present invention.

FIG. 4 is a fourth step of the first embodiment according to the present invention.

FIG. 5 is a fifth process chart of the first embodiment according to the present invention.

FIG. 6 is a sixth process chart of the first embodiment according to the present invention.

FIG. 7 is a seventh process chart of the first embodiment according to the present invention.

FIG. 8 is a cross-sectional view of a dental crown formed according to the first embodiment of the present invention.

FIG. 9 is a first process chart of the second embodiment according to the present invention.

FIG. 10 is a second process chart of the second embodiment according to the present invention.

FIG. 11 is a third process chart of the second embodiment according to the present invention.

FIG. 12 is a fourth process chart of the second embodiment according to the present invention.

FIG. 13 is a fifth process chart of the second embodiment according to the present invention.

FIG. 14 is a sixth process drawing of the second embodiment according to the present invention.

FIG. 15 is a seventh process chart of the second embodiment according to the present invention.

FIG. 16 is a cross-sectional view of a bridge tooth formed according to a second embodiment of the present invention.

FIG. 17 is a first process diagram according to the related art.

FIG. 18 is a second process chart according to the related art.

FIG. 19 is a third process chart according to the related art.

FIG. 20 is a fourth process chart according to the related art.

FIG. 21 is a fifth step diagram according to the related art.

FIG. 22 is a sixth step diagram according to the related art.

FIG. 23 is a seventh process chart of the related art.

FIG. 24 is a cross-sectional view of a conventionally formed dental crown.

[Explanation of symbols]

 15 Abutment tooth 16 Opposing tooth 17 Impression material 18 Abutment tooth impression part 19 Opposing tooth impression part 20 Model abutment tooth 22 Model tooth crown (model tooth) 23 Measuring element 24 Processing material 25a Mounting base 25b Mounting base 26 Tool 27 teeth Crown (artificial tooth) (a) Internal surface processing (b) External surface processing

Claims (2)

[Claims] 1. An impression material is clamped by an abutment tooth cut into a predetermined shape and an opposing tooth facing the abutment tooth to form an abutment tooth impression portion and an opposing tooth impression portion on the impression material. , Two model abutment teeth corresponding to the abutment teeth are formed by the abutment tooth impression part, and a gypsum material is covered on the outer peripheral portion of one of the model abutment teeth, and the outer peripheral surface of the gypsum material is aforesaid. A model tooth is formed by forming a natural tooth shape corresponding to the opposing tooth impression part, the outer peripheral part of the other model abutment tooth and the outer shape of the model tooth are measured, and the measurement data is input to the NC processing machine. Of the artificial tooth, wherein the NC processing machine processes the inner surface of the processed material based on the measurement data of the other model abutment tooth and the outer surface of the processed material based on the measurement data of the model tooth. Processing method. 2. The impression material is pressed by the abutment tooth formed by cutting the teeth on both sides of the tooth removal portion into a predetermined shape, and the opposing tooth facing the tooth removal portion and each abutment tooth to obtain the impression material. An abutment tooth impression portion and an opposing tooth impression portion are formed, and two abutment tooth portions corresponding to the tooth removal portion and abutment tooth are formed by the abutment tooth impression portion, and one model abutment portion is formed. While covering the tooth portion with a plaster material, the outer peripheral surface of the gypsum material is formed into a natural tooth shape corresponding to the opposing tooth impression portion to form a model tooth, and the outer peripheral portion of the other model abutment tooth portion and The outer shape of the model tooth is measured, the measurement data is input to the NC processing machine, and the NC processing machine processes the inner surface of the processed material based on the measurement data of the other model abutment tooth portion, A method for processing an artificial tooth, characterized in that an outer surface of the processed material is processed based on measurement data.