JP3732474B2 - Denture fixing structure and manufacturing method - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a denture, in particular, a fixing structure for a complete denture and a manufacturing method thereof.
[0002]
[Prior art]
Generally, the partial denture fixing structure is manufactured by a metal wire (clasp wire) or a cast clasp as described in JP-A-61-185263. Therefore, it is used only for the crown part.
[0003]
[Problems to be solved by the invention]
As described above, the conventional fixing structure uses a metal clamping angle (one), so that it has strength, but the metal fitting is visible from the outside, so that it does not look good, and there is a sense of resistance when it is attached to natural teeth.
[0004]
Further, since the metal clamping angle has a structure in which the crown portion is sandwiched from the outside and the inside, it has been painful to sandwich the gingival portion and cannot be applied. Furthermore, when putting in and out of the oral cavity in order to attach and detach the partial denture, there is a risk that the oral meat and gingiva are accidentally stabbed.
[0005]
If there are partial dentures on both sides of the natural tooth, connect both partial dentures with a connecting means called a metal bar, hook or connector, or connect the partial denture to the opposite natural tooth with a connecting means Although it is fixed, it is much larger than the holding angle, so there are patients who feel uncomfortable or have metal allergies. In addition, some patients feel unpleasant taste in the case of Co or Ni. As a result, some patients have given up their use and suffered inconvenience because they could not wear partial dentures. The metal takes time to polish, and there is a problem that the cost of the product is increased.
[0006]
In addition to partial dentures and complete dentures, if the part of the ridge that touches the gingiva after extraction is hard, it is disliked by wearing because of pain and discomfort, so a soft material that does not irritate the gingiva is desired.
[0007]
In general, denture bases are manufactured by pressure polymerization of acrylic resin, but if the thickness is made thin, the strength is unsatisfactory, and if the handling is bad, there is a drawback that it deforms or breaks.
[0008]
The technical problem of the present invention is to realize a denture that can solve such problems all at once. In other words, it is a denture that has poor appearance, can be fixed more securely and stably using an inconspicuous transparent plastic material without using metal that causes metal allergy, and it is lightweight and not bulky, and can reduce irritation to the gingiva. Realize the fixed structure and its manufacturing method.
[0009]
[Means for Solving the Problems]
  The technical problem of the present invention is solved by the following means. Claim 1When producing a denture using a model molded from a patient's mold, a soft thermoplastic resin sheet in contact with the ridge is placed on the model and heat-softened. After the vacuum is applied to the mold surface, a thermoplastic resin sheet rich in elasticity is laminated on the mold surface and heat-softened. A method for producing a denture characterized by leaving a portion to be a base floor, placing a denture base on the base floor, fixing an artificial tooth, and then removing it from the model.
[0010]
In this way, the foundation floor is molded with a sheet that is soft in material and does not irritate the gingival gingiva after extraction of the patient. Thus, after forming with a soft sheet | seat, the sheet | seat made from a thermoplastic resin is covered on it, and a foundation floor is shape | molded. Therefore, since the portion of the base floor that is in contact with the patient's gingival gingiva is made of a soft material, the patient has little irritation and can be mounted without resistance.In addition, since the material is rich in elasticity, it is less likely to irritate the gingival gingiva. In addition, the degree of close contact with the gingiva of the ridge is good, and the base floor is adsorbed and fixed to the ridge by saliva alone, so that the denture base of the complete denture is made of plastic and is light and can be mounted stably.
[0011]
Claim 2When producing a denture using a model molded from a patient's mold, a thermoplastic resin sheet rich in elasticity is laminated on a soft thermoplastic resin sheet on the model. After the two-layered sheet is placed and heat-softened, it is attached to the mold surface with compressed air or vacuum suction, and then the excess part is cut and removed to leave the base floor part. This is a method for producing a denture, characterized in that a denture base is placed on top and an artificial tooth is fixed and then removed from the model. If there is a sheet having a two-layer structure of a thermoplastic resin rich in elasticity and a soft resin from the beginning, forming the sheet with a two-layer structure in this way simplifies the process.
  in this way,According to a method of manufacturing a denture by placing a two-layered sheet in which a thermoplastic resin sheet rich in elasticity on a soft thermoplastic resin sheet is laminated on a model and heat-softening it, it was completed.Since the side of the foundation floor in contact with the ridge is made of soft material, the stimulation to the gingiva of the ridge is further reduced, and the degree of adhesion with the ridge is also improved. Therefore, even if it is a complete denture, it can mount | wear stably without a sense of incongruity.
[0012]
3. The denture according to claim 1 or 2, wherein in the foundation floor, the palatal side is removed to leave only the portion near the jaw ridge and leave only the extension of the foundation floor. This is the production method. Thus, according to the manufacturing method to remove the palate part side,Since the floor portion can be made smaller by removing the palate portion in the case of a complete denture, dysphagia and pronunciation problems can be reduced. In addition, since it is made of plastic and light, it can be stably fixed to the jaw crest only with the adsorption force of saliva. As described above, the thermoplastic used in the present invention is more elastic than conventional acrylic resins, has higher strength, and is difficult to break. Therefore, when used in the base of the denture base, The thickness can be reduced. Furthermore, the dentures can be used without resistance without the bad taste of metal.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Next, an embodiment of how the denture fixing structure and the manufacturing method thereof according to the present invention are practically described will be described. FIG. 1 is a first embodiment of a partial denture fixing structure according to the present invention, and is a side view (cheek side view) viewed from the outside. FIG. 2 is an AA plan view (occlusal view) in FIG.
[0014]
In the figure, n1, n2, and n3 are natural teeth. f1 and f2 are artificial teeth, and d is the denture base. In other words, the artificial teeth f1 and f2 and the denture base d constitute a partial denture.
[0015]
1 and 2 are clamping angles, 1 is an outer (cheek side) clamping angle, and 2 is an inner (lingual side) clamping angle. Both the outer clamping angle 1 and the inner clamping angle 2 are integrated with the denture base d and are held by the denture base d.
[0016]
That is, the extension part 1a extended from the outer clamping angle 1 and the extension part 2a extended from the inner clamping angle 2 are both integrated with the denture base d.
[0017]
The denture base d is usually made of acrylic resin and has a bright reddish purple color like the gingiva 3. On the other hand, the sandwiching angles 1 and 2 and the extended portions 1a and 2a are made of a transparent synthetic resin resin processed material.
[0018]
The sandwiching angles 1 and 2 are formed in a shape so as to be sandwiched from both the inside and outside of the root of the natural tooth n1 in substantially the same manner as the conventional clasp. In addition, in a state in which the partial denture is mounted in the oral cavity and the natural tooth n1 is sandwiched between the sandwiching angles 1 and 2, the shape that has the elasticity that the sandwiching angles 1 and 2 are pressed against the root of the natural tooth n1 is suitable. ing.
[0019]
Therefore, in a state where the partial denture is mounted in the oral cavity, the partial denture is formed by pinching the narrow portion of the root of the natural tooth n1 from the inner and outer sides with some elasticity at the inner and outer clamping angles 1 and 2, as shown in the figure. It is held and fixed to the natural tooth n1. That is, since the root portion of the natural tooth n1 is thin, it is blocked by the swollen portion on the upper side and cannot be detached upward. Since there is a gum on the lower side, it cannot move to the lower side. Further, since the natural tooth n1 has a shape in which the center is swollen, the denture base d is also fixed in the horizontal direction by making the inner and outer sandwiching angles 1 and 2 so as to wrap the swollen shape. The
[0020]
Since the holding angles 1 and 2 are made of plastic, they are rich in elasticity. Therefore, when the clamping angles 1 and 2 of the partial denture are attached to and detached from the natural tooth n1, even if the clamping angles 1 and 2 are opened, the original state is surely restored. As a result, it is possible to prevent the fixing force with respect to the natural tooth n1 from being lowered even if it is repeatedly attached to and detached from the oral cavity for many years.
[0021]
Note that the sandwiching angles 1 and 2 are not transparent, and various colored or semi-transparent materials can be used so that a patient who desires coloring can be handled. Further, the inner clamping angle 2 that is difficult to be seen from the outside can be a conventional metal clasp.
[0022]
FIG. 5 is a cross-sectional view at the position of the natural tooth n1, (1) FIG. 5 is an example in which both the inner and outer clamping angles 1 and 2 are transparent bodies, and (2) the outer clamping angle 1 is a transparent body. An inner clamping angle of 2 m is an example of a metal clasp.
[0023]
Since the elasticity of plastic is easy to adjust, soft touch that does not feel pain even when pressed against the gingiva is possible. FIG. 3 is an example of holding and fixing a partial denture using gingiva instead of natural teeth, and is a side view (cheek side view) seen from the outside. FIG. 4 is a BB plan view (occlusion surface view) thereof.
[0024]
The gingival covers 4 and 5 having a relatively wide surface compared to the sandwiching angles 1 and 2 are made of a plastic material rich in elasticity, and the portions 4a and 5a extending to the denture base d side are denture bases d. And integrated.
[0025]
Therefore, in a state where the partial denture is mounted in the oral cavity, the gingival covers 4 and 5 integrated with the denture base d are in pressure contact with the gingiva of the natural tooth n1 adjacent to the artificial tooth f2. In this way, since the gingiva covers 4 and 5 are pressed against the gingiva by soft touch on the wide surface, the partial denture can be held and fixed to the gingiva without feeling pain in the gingiva.
[0026]
When holding and fixing using gingiva, since it is important to make use of the soft elasticity of the gingival covers 4 and 5, unlike the case of the clamping angle, the inner gingival cover 5 is suitably made of plastic. Also in this case, the gum covers 4 and 5 can be colored or translucent.
[0027]
However, the gingival covers 4 and 5 are also preferably the same color as the denture base d, that is, the same color as the gingiva 3 in order to support the gingiva.
[0028]
In the above embodiment, in order to integrate the extension portions 1a, 2a, 4a, and 5a from the clamping angles 1 and 2 and the gingival covers 4 and 5 with the denture base d, the extension portion is formed when the denture base d is molded. There are a method in which 1a, 2a, 4a, and 5a are insert-molded inside the denture base d and a method of bonding.
[0029]
In insert molding, when the parts of the gums of the artificial teeth f1, f2 are insert-molded into the denture base d, the extension portions 1a, 2a, 4a, 5a are also insert-molded at the same time.
[0030]
In the case of bonding, the bonded surface of the denture base d molded in advance is shaved. That is, the extension portions 1a, 2a, 4a, and 5a are protruded, and the concave portions are formed by cutting the thickness portions of the extension portions 1a, 2a, 4a, and 5a and the bonding allowance so as not to feel uncomfortable. If possible, it may be formed when the denture base d is molded.
[0031]
When the extension portions 1a, 2a, 4a, and 5a are fitted and bonded to the recesses thus formed, they are integrated with the denture base d, and the outer surfaces of the extension portions 1a, 2a, 4a, and 5a and the outer surface of the denture base d are the same. Can be aligned to the surface.
[0032]
When the extensions 1a, 2a, 4a, and 5a are colored, it is natural to consider harmony with the color of the denture base d. Therefore, when the gingival covers 4 and 5 having the same color as the denture base d are used, the bonded portions are not easily noticeable.
[0033]
As shown in FIGS. 5 (3) and 4 (4), the inner side of the natural tooth n 1 can use the clamping angle 2 instead of the gingival cover 5. That is, the sandwiching angle 2 in FIGS. 1 and 2 is used for the inner root of the natural tooth n1.
[0034]
Even when the gingival cover is fixed in this way, as shown in FIG. 5 (3), both the outer gingival cover 4, the inner clamping angle 2 and the gingival cover 5 can be made of transparent plastic. Further, as shown in FIG. 5 (4), only the outer gingival cover 4 may be made of transparent plastic, and the inner clamping angle 2m may be a metal clasp similar to the conventional one.
[0035]
FIG. 6 shows an embodiment in which the gingival covers 4 and 5 cover the gingiva and the crown portion. (1) As shown in the figure, the gingival covers 4 and 5 on both the inner and outer sides may cover the gingiva 3 and the natural tooth n1, but only the outer gingival cover 4 as shown in (2). Alternatively, as shown in (3), only the inner gingival cover 5 may cover the gingiva 3 and the natural tooth n1. Also in this case, the inner clamping angle 2 and the gingival cover 5 may be made of metal.
[0036]
When the inner and outer gingival covers 4 and 5 are made of the same material, the extension portions 4a and 5a may be integrated in advance as shown in FIG.
[0037]
FIG. 7 shows an embodiment in which the gingival covers 4 and 5 are formed of the denture base d itself. In FIGS. 3 and 4, separate gingival covers 4 and 5 are integrated with the denture base d, whereas in FIG. 7, the denture base d is extended over the gingiva of the natural tooth n1. Then, in the same manner as in the case of the gingival covers 4 and 5, the gingival covers 4d and 5d are brought into pressure contact with the gingiva 3 of the natural tooth n1 by the elasticity of the extended gingival covers 4d and 5d.
[0038]
In this case, the material of the denture base d is a problem, and it is suitable as the denture base d, and the material that can be pressed onto the gingiva by a soft touch is selected similarly to the gingival covers 4 and 5. For example, polycarbonate resin or vinyl resin processing material is suitable.
[0039]
FIG. 8 is a diagram showing an embodiment in which a concave curved holding means is used. (1) As shown in the figure, the outer surface of most natural teeth n is a convex or drum-shaped curved surface 6. In the case of the front teeth, the inner side may be depressed, but the inner side is also swollen except for the front teeth.
[0040]
Therefore, as shown in (2), when the sandwiching means 7 has a concave curved surface 8 that exactly fits the convex curved surface 6, the sandwiching means 7 moves upward and downward relative to the natural tooth n. Also difficult to move. This is because the convex curved surface 6 is fitted into the concave curved surface of the clamping means 7 and thus acts as a catch.
[0041]
In addition, when it is depressed like the inner side 6i of the natural tooth n shown in the figure, the convex surface 8i may be formed so that the clamping surface of the inner clamping means 7i is fitted into the depression 6i.
[0042]
A horizontal sectional view of the position of the convex curved surface 6 of the natural tooth n is shown in (3). As is clear from this figure, the shape of the horizontal cross section of the natural tooth n is also swelled at the center, so that the concave curved surface 8 is also a concave curved surface with respect to the horizontal direction. Can be fixed securely.
[0043]
The clamping angle 1 and the gingival cover 4 are structured to be fixed to only one adjacent natural tooth n1, but in the case of (3), two adjacent natural teeth n1 and n2 are used. And fixed. In other words, the inner and outer clamping means 7 and 7 are extended to the second natural tooth n2 to form a continuous clamping means.
[0044]
Thus, since it fixes using a some natural tooth, a partial denture can be fixed stably more firmly. In addition, as shown in (2), since there is also a function of preventing the partial denture from moving in the vertical direction with respect to the natural tooth n, it can also serve as a rest for preventing the partial denture from settling. In this case as well, at least the outer clamping means 7 is made of transparent plastic so as not to stand out.
[0045]
3 and 4, the inner and outer concave curved holding means 7 and 7 are extended downward as shown in (4), and the extensions 7a and 7a extend the gums. Gingiva may also be sandwiched.
[0046]
The pinching means 7 having the concave curved surface 8 and the double-pinching pinching means 7 can also be embedded or bonded to the denture base in the same manner as the pinching angle and gingival cover shown in FIGS. .
[0047]
FIG. 9 is a plan view showing a method of manufacturing a partial denture fixing structure in the order of steps. (1) is a model of the maxillary dentition, which is molded based on a mold collected from a patient. Then, assuming that n1, n2, n3,... Are natural teeth remaining in the patient, a case will be described in which a concave curved clamping means for clamping two natural teeth n1, n2 is formed. In this case, one transparent thermoplastic sheet 9 is placed over the two natural teeth n1 and n2 and the missing part ridge (F1, F2). The thickness of the sheet 9 is arbitrary. In addition, F1 and F2 are the traces of the tooth which extracted the natural tooth in the defect part jaw ridge.
[0048]
In each figure (1) ... (4), the AA position of the natural tooth n1 and the cross-sectional view at the BB position of the defect part ridge (F1) are also shown.
[0049]
Next, the model and the sheet 9 are set in a molding apparatus, and, for example, in a state where heat of about 100 to 150 ° C. is applied, a pressurized wind is applied from above the sheet 9 or vacuum suction is performed from below the model. The sheet 9 is heat-softened and adheres to the entire upper surface and side surfaces of the natural teeth n1 and n2 as in 9a of (2), and the upper surface and side surfaces of the model missing portion jaw ridge (F1, F2). Also adhere to.
[0050]
In this state, when it is taken out from the molding apparatus and the excess part is cut and removed, (3) is obtained. That is, the inner and outer concave curved sandwiching means 7 and 7 and the rest portion 10 remain, and the portion that becomes the foundation floor 11 remains on the defect jaw ridge (F1, F2). Next, as shown in (3), a denture base, that is, a portion d corresponding to a gum is formed on the base floor 11 on the missing portion ridge (F1, F2) by a conventionally known method. This denture base is formed using a resin such as acrylic or polycarbonate. Naturally, a resin colored pink is used so as to have the same color as natural gums.
[0051]
Next, as shown in (4), when the artificial teeth f1 and f2 are fixed on the denture base d, the partial denture is completed. The inner and outer clamping means 7 and 7, the foundation floor 11 and the rest 10 are transparent. The completed partial denture is removed from the model, the patient's natural teeth n1 and n2 are sandwiched between the internal and external clamping means 7 and 7, and the rest 10 is mounted so as to be hooked on the occlusal surface of the patient's natural tooth n1.
[0052]
In this embodiment, the foundation floor 11 is single, but it can also be a two-layer structure. That is, using a transparent sheet that is softer in material than the foundation floor 11 and that does not irritate the gingival gingiva after extraction of the patient's teeth, the clamping means and the foundation floor are obtained by the methods (1) and (2). Is molded. Thus, after forming with a soft sheet | seat, the sheet | seat 9 made from the above thermoplastics is covered on it, and a clamping means and a foundation floor are shape | molded by the method of (1) (2).
[0053]
Thereafter, as shown in (3) and (4), unnecessary portions are removed, a denture base d is formed, and artificial teeth f1 and f2 are fixed thereon. In this way, the portion of the foundation floor of the partial denture is made of a soft material at the portion in contact with the patient's gingival gingiva, so that the patient has little irritation and can be mounted without resistance. In addition, when there is a sheet having a two-layer structure of a transparent and elastic thermoplastic plastic and a transparent and soft resin from the beginning, when the two-layer sheet is molded, the steps (1) and (2) are performed. Simplified.
[0054]
When the base floor 11 is also desired to have the same color as the gum as in the denture base d, it is preferable to use a sheet in which only half is transparent and the other half is colored in the gum color. The clamping angle and gingival cover shown in FIGS. 1 to 4 can also be manufactured by the method shown in FIG.
[0055]
The manufacturing method of FIG. 9 can also be applied to partial dentures and complete dentures having a bar structure. FIG. 10 shows a partial denture having a bar structure, in which partial dentures are arranged on both sides of natural teeth n1... N6. In the case of such a bar structure, the bar 12 is conventionally made of metal, but in the case of the present invention, it is made of a transparent thin plate.
[0056]
Both ends 12a, 12b of the bar 12 of the transparent plate made of thermoplastics may be embedded in the denture bases d1, d2 of the left and right partial dentures in the same manner as in FIGS. 1 to 4, or the ends 12a, 12b. The denture bases d1 and d2 may be stacked and bonded on top.
[0057]
However, according to the manufacturing method of FIG. 9, when the base floor of the left and right partial dentures is first formed with a thermoplastic sheet, the bar portion 12 is also formed together. That is, when a large sheet covering the base floor of the left and right partial dentures and the bar portion 12 is used, pressurizing or vacuum-sucking as described above, forming, and then removing the excess area, the bar portion 12 The inner and outer clamping means 7, 7 and the left and right foundation floors 11 remain.
[0058]
Next, as in the case of FIG. 9, denture bases d1, d2 are formed on the left and right base floors 11, 11, and artificial teeth f1, f2,. The bar portion 12 when the base floor 11 is formed functions as a bar connecting the completed left and right partial denture bases d1 and d2. However, the bar portion 12 is implemented according to the patient's request, and it is sufficient if the left and right denture bases d1 and d2 are separately manufactured and mounted separately by the manufacturing method of FIG. This is because it can be sufficiently fixed only by the clamping means 7 and 7 inside and outside each partial denture.
[0059]
In FIG. 10, the denture base d is formed on the entire surface of the foundation floor 11, so that the foundation floor 11 is hardly visible, but in FIGS. 8, 9 and the next FIG. 11, it is smaller than the foundation floor 11. Since the denture base d is formed, the outer periphery of the base floor 11 is partially exposed from the outer periphery of the denture base d. Which one is adopted is free.
[0060]
The production method of the present invention is also suitable for complete dentures. That is, in the model of FIG. 11 (1), on the whole jaw ridge (F1, 2...) After all the natural teeth are missing, as in the case of FIG. 9, a transparent and elastic thermoplastic. A large plastic sheet 9 is stacked and heated or pressurized or vacuum-sucked to form a base floor 11 as shown in (2). After removing unnecessary parts, gums and If the denture base d of the same color is formed and finally the human teeth f1, f2,... Are fixed on the base floor d, a complete denture as shown in FIG. The foundation floor 11 of this complete denture is fitted and attached to the ridge of the patient after extraction.
[0061]
The illustrated example uses a sheet 9 having a two-layer structure in which a transparent and elastic thermoplastic layer 92 is laminated on a transparent and soft resin layer 91 from the beginning. (1) As described in (2), after molding with the soft resin layer 91, the thermoplastic layer 92 may be laminated and molded thereon.
[0062]
That is, a transparent soft sheet 91 made of a transparent and soft material is formed on the whole jaw ridge (F1, F2,...) After natural teeth have been lost. When the base floor 11 having a two-layer structure is formed by stacking 92, soft touch with the patient's ridge gingiva can be mounted without resistance.
[0063]
The complete denture of the present invention is rich in elasticity, and since the soft denture base or the thermoplastic denture base is in contact with the gingival gingiva, Good adhesion to gingiva and is firmly adsorbed and fixed to the chin by saliva. Therefore, the palate part 13 can be largely deleted as shown in FIG.
[0064]
11a is a portion extending from the foundation floor 11, and is a soft resin layer or a thermoplastic material rich in elasticity. This portion also adheres to the palate with saliva, so the area may be small. As a result, since the exposed area of the palatal mucosa is enlarged, there is no sense of incongruity at the time of wearing, and the burden on the patient is reduced. As a result, it is easily accepted by patients who dislike wearing a complete denture.
[0065]
In the case of the two-layer structure, the sandwiching means or the like can be prevented from being folded when the reinforcing core material is stacked on the soft layer and then the thermoplastic transparent layer is stacked. In addition, if a patient's name is engraved or written using a soft layer and a transparent thermoplastic layer is laminated on the patient's name, denture management becomes easy.
[0066]
In the case of a two-layered sheet or a single sheet, if there is a commercial product with a core material in it, it may be used.
[0067]
Examples of the thermoplastic used in the present invention include polycarbonate, polystyrene, polyethylene, polyurethane, and vinyl chloride.
[0068]
【The invention's effect】
  As in claim 1The foundation floor is molded with a sheet that is soft in material and does not irritate the patient's gingival gingiva after extraction, and the foundation floor is molded by covering the sheet with a thermoplastic resin sheet. Therefore, the portion of the base floor that is in contact with the patient's gingival gingiva is made of a soft material, so that the patient has little irritation and can be mounted without resistance.In addition, since the material is rich in elasticity, it is less likely to irritate the gingival gingiva. In addition, the degree of close contact with the gingiva of the ridge is good, and the base floor is adsorbed and fixed to the ridge by saliva alone, so that the denture base of the complete denture is made of plastic and is light and can be mounted stably.
[0069]
If there is a sheet having a two-layer structure of a thermoplastic resin rich in elasticity and a soft resin from the beginning, the process is simplified by molding with a sheet having a two-layer structure as in claim 2. In addition, a method for producing a denture by placing a sheet of a two-layer structure in which a thermoplastic resin sheet rich in elasticity on a soft thermoplastic resin sheet is laminated on a model and heat-softening the sheet According to the finishedSince the side of the foundation floor in contact with the ridge is made of soft material, the stimulation to the gingiva of the ridge is further reduced, and the degree of adhesion with the ridge is also improved. Therefore, even if it is a complete denture, it can mount | wear stably without a sense of incongruity.
[0070]
As in claim 3, according to the manufacturing method of removing the palate side,Since the floor portion can be made smaller by removing the palate portion in the case of a complete denture, dysphagia and pronunciation problems can be reduced.
[Brief description of the drawings]
FIG. 1 is a side view of a first embodiment of a partial denture fixing structure according to the present invention, viewed from the outside.
FIG. 2 is a plan view taken along the line AA in FIG.
FIG. 3 is an example of holding and fixing a partial denture using gingiva, and is a side view seen from the outside.
4 is a BB plan view in FIG. 3. FIG.
FIG. 5 is a cross-sectional view of a natural tooth n1.
FIG. 6 is a cross-sectional view of an embodiment for covering a gingiva over a gingiva and a crown.
7 is an embodiment in which a gingival cover is formed by an extension of the denture base itself, (1) is a plan view, and (2) is a side view as seen from the outside. FIG.
FIG. 8 is a diagram showing an embodiment using a concave curved holding means.
FIG. 9 is a diagram showing a method of manufacturing a partial denture fixing structure in the order of steps.
FIG. 10 is a plan view of a structure in which partial dentures on both sides are connected by a bar.
FIG. 11 is a view showing an embodiment in which a complete denture is manufactured by the manufacturing method of the present invention.
[Explanation of symbols]
n1, n2, n3 natural teeth
f1, f2 artificial teeth
d, d1, d2 Denture base
1 Outer clamping angle
1a Extension
2 Inner clamping angle
2a Extension
3 Gingiva
4 Gingival cover
4a Extension
5 Gingival cover
5a Extension
4d, 5d Extension from denture base (gingival cover)
6 Taiko-shaped convex curved surface
7 Clamping means
8 concave surface
9 Transparent thermoplastic sheet
91 Soft resin layer
92 Thermoplastic layer
10 Rest
Traces of natural teeth on F1, F2 missing part ridge
11 Foundation floor
12 bar
12a, 12b Bar ends
13 Palate

Claims (3)

When making a denture using a model molded based on a mold taken from a patient,
In a state where a soft thermoplastic resin sheet in contact with the ridge is placed on the model and heat softened, it is attached to the mold surface with compressed air or vacuum suction,
A thermoplastic resin sheet rich in elasticity is laminated on it, heat-softened, and applied with compressed air or vacuum suction, and the excess part is removed to leave the part that becomes the foundation floor. A method for producing a denture, wherein the denture base is overlaid and the artificial tooth is fixed, and then removed from the model. When making a denture using a model molded based on a mold taken from a patient,
A two-layered sheet in which a thermoplastic resin sheet rich in elasticity is laminated on a soft thermoplastic resin sheet is placed on the model and heat-softened. After attaching to the mold surface, cut off and remove the excess part, leaving the part that will become the foundation floor, overlaying the denture base on this foundation floor, fixing the artificial teeth, and then removing it from the model A method of manufacturing a denture characterized by 3. The method for producing a denture according to claim 1 or 2, wherein only the extension part of the foundation floor is left while removing the palate side of the foundation floor and leaving only the portion near the jaw ridge.

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