JPS61125340A - Method and apparatus for producing denture floor - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a method for manufacturing a denture base and an apparatus therefor for manufacturing dentures used in dental treatment, and in particular to AM dentures, local base ate'' 9i method for manufacturing dentures with dentures that are in direct contact with the oral mucosa and 5IC method.

(Prior art) Conventionally, in dental treatment, treatment has been performed to treat partial or total tooth loss in the dentition, as well as to compensate for periodontal J11J:l χ trade defects caused by ('F'). In order to artificially restore the functional and aesthetic changes caused by tooth loss, complete dentures, local dentures, and other dentures that are attached directly to the oral mucosa are manufactured.

The production of these dentures is generally done by filling a plaster mold formed by an impression mold with thermosetting U (fat), and filling it with i
o Polymerize for 1 to 2 hours in boiling water at O'C.
This is done by hardening to create a denture base, and then implanting artificial teeth into this denture base.

(Problem to be Solved by the Invention) However, the denture base of a denture with 11 nails is placed in boiling water at 100°C to polymerize, but at that time, the temperature inside the denture reaches 120°C due to the heat of polymerization. It hardens by removing the top to a certain extent. Therefore, when the denture base is removed from the boiling water after hardening and the temperature is lowered to about room temperature, the denture base undergoes thermal contraction due to the temperature layer. Since the part in contact with the tooth (It) is formed to have a thinner wall thickness than the part in contact with the tel stem, the entire denture base is pulled into the thickness of the part in contact with the gum, causing the entire denture base to curve.

Therefore, the denture base in the part that contacts the mouth part (maxilla) or the ancient capital (f, jaw) cannot be brought into close contact with the entire surface of the mouth part (upper mouth) or the ancient capital (lingual jaw) in the oral cavity, resulting in a raised part, and this gap It is easy for air to enter the denture base, and therefore, such denture bases often peel off and fall inside the wearer's mouth.

In addition, the work of removing the denture base, which has been cured by heating and polymerizing, from the plaster mold is performed during the curing υ (when the temperature of the fat cools to room temperature, contraction occurs, and the cured resin adheres even more closely to the stone mold). It becomes an extremely difficult task.

(Means for Solving the Problems) The present invention has been made in view of the above points, and consists of a tjS1 step of covering a one-mata type with a photocurable resin layer, and a soft light-transmitting layer with good elasticity applied thereon. A second step of densely covering the model with a transparent group, an interface between the model and the photocurable resin layer formed by the first and second steps, and a soft transparent group with good elasticity between the photocurable resin layer and the photocurable resin layer. The third step is to suction and eliminate the gas present on the +1# surface of the resin, and while applying one pine to the third step, the photocurable resin is irradiated from the outside of the soft translucent group with good elasticity. By performing all the above steps of step wS4, the light-curing resin fl! A method for making a denture base, which is characterized by polymerizing and curing a photocurable resin on a conventional mold after pressing the layers together and making a mold, and irradiating light for curing the photocurable ω11 part. an apparatus, a 1A model for covering the photocurable resin layer, a flexible light-transmitting group with good elasticity for further covering the photocurable resin layer, the light-transmitting film, and the 1A model. and a means for suctioning and removing gas interposed at the interface between the jaw FA type and the photocurable resin layer and the interface between the photocurable 81 resin layer and the transparent film. This is an IL device for manufacturing a denture base, characterized in that:

(Example) An example of the g1 manufacturing method of the denture base of the present invention and the apparatus used therein will be described based on the drawings.

Figure 1 shows how the denture base of the present invention is made. It is a longitudinal cross-sectional view of the L device, and is an explanatory diagram of each manufacturing process for manufacturing the denture bases shown in Figures jl'+2 to 1st drawing and Figure 10 to manufacture a denture with a denture.

First, an example of a method for manufacturing a denture with a base using the denture base of the present invention will be described in detail below. Explain.

Approximately 1A round shape 'IJI construction process using impression material: Impression material 1
knead al) on the sheet 2 and press it against the upper jaw and/or lower jaw 3 in the oral cavity to take an approximate impression of the upper jaw and/or lower jaw 3; As a result, a roughly round shape (circular shape) 4, a so-called round shape, is formed by the impression material 1 on the upper and lower jaws 3 (see FIG. 2).

G-7! Approximately 1 square-shaped inheritance made of wood: In the above process!
l! Based on the rough one-mall shape 1 made of the impression material prepared, plaster slurry is poured into it and allowed to harden, thereby creating a rough model III (convex shape) 6 made of plaster material (see Fig. 3).

G1 manufacturing process for each tray: Place Pace F-shaped photocurable U (fat N7) on the rough W hood shape (convex shape) 6 made of plaster material left in the previous step and press it with your P finger. After this, the first step will be explained in detail later.
Figure hardening! The thickness of the upper blade according to the liL placement and curing method.
The photocurable resin 7 is cured by emitting light from the photocurable resin 8.

thus? rMake a tray that almost matches the upper and/or lower jaw 13 of each individual, that is, each individual tray 9 (concave! 3 (see Figure 4)) Ff'l Manufacturing process of the concave chinmata type: Place the impression material 1 on each tray manufactured in the step GI I and press it against the upper jaw and/or the lower part 73 in the oral cavity to make a precise impression of 11A3, and make a precise concave impression mold 109. (Refer to Figure 5) Manufacturing process of precise convex 1A Boku mold: In the above process, plaster slurry is again poured into the precise concave one-mata mold 10 and hardened to form a precise model. 11
Make a convex shape (see Figure 6).

Depends on occlusion ≧. III adjustment process; In the above process! Set the precise model 11 (convex type) in the articulator, predict the occlusal shape when artificial teeth are implanted in the upper teeth and V1'll [3], and calculate the height and the pond. Total, 11
! IL, precise 1 Boku type 11 (convex type) occlusal condition adjusted by +4.

E This invention a tooth bed fold structure! +111 step ln Remove the precise Chinomata pear 11 (convex type) adjusted in step 1 from the articulator, and place it on the plate 12 (placed on the plate 12) to approximate the gums. Colored sheet-like or paste-like uncured round hardening material A (Put fat 7 on top of it, press lightly with your fingers and stretch it out to an approximately uniform thickness, then remove the excess. The photocurable resin 7 is removed.

[12 Step 1 And the rotation [12] Periphery! ! ! +3 upper 1ff61
3a, a soft translucent rubber with good elasticity (+4) is added, and the circumference ffl'! ! A ring 16 is fitted from the upper end 13m of the portion 13, and the rubber sheet 14 is closely fixed to the outer periphery of the peripheral edge 11 portion 13 of the rotation m12 (see Figure 7 of the foil).

[Third Step 1] Next, as shown in FIG. 8, a soft translucent rubber sheet 14 with good elasticity is attached to the rotary plate 12 to form a rotary plate 12. The air in the space 15 between the +4 limb cover is sucked and exhausted from the suction hole 17 drilled in the lower part of the rotation +11112 through the vacuum rubber vibrator 34 to reduce the pressure, and the interface between the 1i matata type and the photocurable u11 position is 11
a and V photocurable υ (the gas present in the !AL+1l14a between the fat layer and the soft rubber transparent rubber band with good elasticity is sucked. By doing this, the 7 layers of photocurable resin are removed from above by the rubber sheet 14. The precise 111mata type 11
Closely contact.

In addition, since the round shape is made of plaster, it is a finely porous material, but a large number of pores are artificially bored in it to improve breathability, i.e., the suction and removal of the gas. is desirable.

[Fourth step 1 Furthermore, while maintaining the suction wi king state, the previous time (dish 12
The rJ between the pulley 18 which is pivoted below and the pulley 21 of the output shaft 20 of one motor! The l-frame is passed over and the r-shaped belt 22 rotates the n:i jawmata type at a low speed. Then, intermittent light is irradiated by a 7L/N light 8 suspended from the tile plate 23 above the rotary plate 12 and biased against the reflective mold 24, and the pre-hardened resin is closely attached to the precision lPA mold 11. The oil layer 7 is cured. In this case, the bubbles generated from within the photocurable resin layer during light irradiation are constantly sucked and exhausted, so they do not remain, and the photocurable resin FylJ
@ remains attached to the model. Note that the light irradiation time is usually about 15 to 20 seconds.

In an instant, 'g! Air is introduced to return the rubber sheet 14 to its original state, and
After removing 6 and the rubber sheet 14, the photocured wood l1l
Remove the precision one-round mold 11 to which the layer 7 is attached from the rotary plate 12.

As described above, the tooth base a of the present invention is completed on the jaw model ll, but in order to manufacture a complete denture or a local denture, artificial teeth hl are placed on the denture base.

Artificial tooth implantation process: The light-cured resin layer 7 is in close contact with the chin and precise jaw opening 1
Set 1 in the III articulator and harden! Artificial material 127 made of ceramic etc. is placed on the bulging part 2G corresponding to 361 gums at 11th and 7th place.
Temporarily adhere by pasting with pre-curing TJL TILT 7A.

The artificial tooth 27 is fixed to the denture base bulge by moving the rubber sheet 14 into the hardening holder and irradiating it with light on the rotary plate 12 while holding the rubber sheet 14 (FIG. 9). reference).

Gum formation step: Artificial! ! [In order to completely harden 127 and complete the gum part at the same time, apply uncured photocurable 117b to the peripheral part of the artificial tooth 27 with your finger to form the tooth-1 part. Then, photocuring is carried out again in the same manner as in the artificial implantation process in the cocoon curing apparatus (see Fig. 10).

Material: As the photocurable resin used in the present invention, known photocurable resins such as the ethylenically unsaturated polymeric substance described in JP-A-57-203007 can be used.

It should be noted that these known photocurable resins contain a photosensitizing material, a 7-day darkening agent, a catalyst, a photosensitive material, and the like.

This high-quality photocurable resin is usually stored in a four-round black bag, but it is generally recommended to use a visible range round line with a wavelength centered around 500 nm as the irradiation light for photocuring. can. Light sources that emit these rays include xenon lamps, strobe lights for photography, fluorescent lamps, and the like.

Hardening device! Embodiments of the denture base manufacturing apparatus of the present invention will be described below based on the drawings.

The first item is the tooth base IQ of the present invention for manufacturing a tooth with a base.
FIG. 3 is a longitudinal cross-sectional view of the device.

Reference numeral 8 designates a xenon lamp protruding inside the curved reflector plate 24 which hangs down from the top plate 23 of the housing 30;
Directly below that is a rotation 1112, and on the center of that [112 is 101! A precision one-sheet mold 11 made by the manufacturer is placed thereon, and a pasty uncured curable resin layer 7 is coated on the one-sheet mold 11.

A soft rubber sheet 14 is placed on the upper end 13a of the peripheral wall 13 of the rotary plate 12, and a photocurable resin IIJ7 is encapsulated in the upper part of the 1-car mold 11. The ring 16 is fitted, and the rubber sheet 14 is wrapped around the outer periphery of the peripheral wall 13 of the plate 12 15 times.

A suction hole 32 connected to a vacuum pump 31 is bored in the center of the bottom of the rotary plate 12 . The suction hole 32 of the rotation ff112 is shaped by a suction pipe 33, and the rotary plate 12 is attached to a rotary shaft 34, and a pulley 18 is pivotally attached to the end of the rotary shaft 34.

Accordingly, the rotary plate 12 is rotated by a belt 22 that is passed between the boot 9-18 and the pulley 21 of the output shaft 20 of the motor 19 in the horizontal direction.

(The purpose of rotating the plate 12 is to prevent uneven light irradiation, so it is sufficient to rotate the plate 12 as long as it does not cause shadows depending on the irradiation angle of the light source, and do not rotate it too quickly. 6. Since the device of the embodiment of the present invention uses a light source with a large amount of light such as a strobe light, it is housed in the casing 30 so that the light does not come out to the outside. Sometimes, the handle 35 is pulled to remove the rotating plate 12, rotating shaft 34, suction pipe 33, and motor 19.
, the pulley 18.21rI is housed in a drawer section 36 that can be pulled out along the idle rail 37.

The 'i'tf5I type is made of gypsum or C2, a fine porous material, but it has a large number of pores artificially drilled in it to improve breathability, that is, the suction and removal of the x body. It is desirable that the casing 30 has a 7T tube 38 attached thereto to prevent the temperature inside the casing 30 from rising.

Further, a vacuum rubber pipe -Q 39a is fitted into the suction pipe 33 forming the suction hole 32, and one end 39b of the vacuum rubber pipe is connected to the suction nozzle 40 inserted through the housing 30. They are mated. Therefore, in order to eliminate the air in the space 15 of the rotation ff112 and the rubber sheet 14:d suction hole 41 of the vacuum pump 31 in the suction 7' All you have to do is turn the string on.Furthermore, an electric control section is installed in the upper part 42 of the main housing ((), and controls the main device.

(Effects of 9 & Bright) As described above in detail in the Examples and the like, according to the present invention, the photocurable resin layer is precisely suppressed and covered without forming any voids on the surface of the molded surface. By being photo-cured in the same state, the Ia tooth base made from a very accurate impression of the first model surface is made into aa, and the remaining denture base does not require high temperatures to mold and harden. Therefore, no shrinkage occurs even after curing, so the shape of the jaw can be accurately copied, and even if there is a partial tendency to thick or thin wall thickness, the denture base will not curve.Therefore, the present invention When the a@floor manufactured by is attached to the upper or lower jaw in the oral cavity,
If the denture base is fitted accurately to the upper or lower jaw, FlEIII will not occur (therefore, it is unlikely that an unexpected situation will occur if the denture base loosens or falls during installation).

In addition, when the photocurable resin layer is irradiated with light, bubbles may be generated from within the photocurable resin ays, but in the present invention, bubbles are forcibly removed by suction, so they do not accumulate. Therefore, the photocuring resin becomes cloudy due to the bubbles,
It's deformed! 1 does not occur, and the resulting denture base does not shrink after hardening, making it extremely easy to remove from the stone model.

Furthermore, the curing time is less than 1 minute, and compared to the conventional method of curing in boiling water for 1 to 2 hours, the denture can be completely cured on the spot without making the patient wait during treatment. Since the device can be attached to the patient in the same manner, treatment time can be significantly shortened.

Moreover, the present invention exhibits excellent effects that are unprecedented in the art, and makes a very large contribution to this field.

[Brief explanation of drawings]

Fig. fB1 represents a vertical cross-sectional view of an embodiment of the aa1 bed manufacturing apparatus of the present invention, and Figs. ! 1
! It represents a cross-sectional view of a denture base etc. in the construction process. 1: Impression material, 2: 1 wart tray, 3: Upper jaw, lower jaw, 4: Rough jaw model (impression material), 6: Rough vPA model (stone r°1
．． 7.7a, 7b: Photocurable resin, 8: Light source, 9: Each tray, 10: Precise 1 model (1! I type), 11: Precise 7-mata type (convex type), 11s: Jaw model and Interface with photocurable resin layer, 12: Rotation 1.14: Soft translucent rubber sheet,
14a: Photocurable opening (interface between fat layer and soft transparent rubber sheet, 15: Space, 16: Ring, 17: Suction hole, 1
8.21: Pulley, 19: Motor, 22: Belt,
24: Reflector, 26: 111I exit, 27: Artificial tooth, 3
0: ii (body, 31: true? 2 honfu, 32; suction hole,
33: Suction pipe, 34: Rotating shaft, 40: Suction nozzle

Claims (2)

[Claims] (1) A first step of covering the jaw model with a photocurable resin layer, a second step of covering and sealing the jaw model with a soft light-transmitting film with good elasticity, and the above-mentioned first and second steps. A third step of suctioning and eliminating gas present at the interface between the jaw model and the photocurable resin layer and the interface between the photocurable resin layer and the elastic soft transparent film, and applying rotation to the third step. while doing,
By performing all the steps above, including the fourth step of irradiating the photocurable resin with light from the outside of the flexible, transparent film,
Manufacture of a denture base characterized in that the light-curable resin is polymerized and hardened on the jaw model while the light-curable resin layer is pressed and adhered to the jaw model surface using the light-transmitting film and molded using atmospheric pressure. Method. (2) A light irradiation device for curing the photocurable resin layer, a jaw model for covering the photocurable resin layer, and a soft transparent material with good elasticity for further covering the photocurable resin layer. a light-sensitive film, a means for rotating the light-transmitting film and the jaw model together, and intervening at the interface between the jaw model and the photocurable resin layer and the interface between the photocurable resin layer and the light-transparent film; A device for manufacturing a denture base, comprising means for suctioning and eliminating gas.