JP3103848B2 - Orthodontic appliance and method of manufacturing the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dentition protection orthodontic tool which has been formed into a shape which can be easily manufactured for a user.

[0002]

2. Description of the Related Art In the prior art, a preformed tooth protector, for example, a mouthpiece, has a cross-sectional shape in a direction perpendicular to a dental arch, which is uniformly U-shaped or co-shaped over a molar or anterior tooth. It is formed in the shape of a letter.

In addition, the thickness of the portion corresponding to the lip surface and the lingual surface is substantially the same as the thickness of the portion corresponding to the occlusal surface, and the height of the portion corresponding to the lip surface is the same as the thickness of the portion corresponding to the lingual surface. The height is almost the same.

[0004]

When the dentition protector is softened by heating and pressed against a user's dentition or a dentition model, the U-shaped or co-shaped dentition protector is used. When the bottom surface of the character is deformed in accordance with the fissure existing in the occlusal surface of the molar, the wall of the dentition protector corresponding to the buccal surface or the lingual surface is deformed in a direction away from the buccal surface or the lingual surface of the molar. For this reason, there is a disadvantage that it is difficult to secure adhesion to the dentition.

Further, since the thickness of the portions corresponding to the lip side and the tongue side is formed to be substantially the same as the thickness of the portion corresponding to the occlusal surface having a relatively large thickness due to the necessity of shock absorption performance, When a person wears and uses the dental arch, the part corresponding to the lip side or the tongue side presses the lips or tongue, so that there is a drawback that a sense of discomfort is strong.

Further, since the height of the portion corresponding to the lingual surface and the height of the portion corresponding to the lip side are formed substantially the same, it is difficult to adhere to the gingival surface on the lingual side when the height is high. In addition, when the tongue has a strong sense of incongruity and the height is low, there is a disadvantage that the orthodontic appliance is easily detached from the dental arch because the area of contact with the gum on the lip side is small.

In the anterior teeth or the canines, since the gap between the dentition protector and the anterior teeth or the canines is large, the operation of heat softening molding for ensuring the close contact with the dentition is complicated.

[0008]

According to the present invention, in a dentition protection orthodontic tool which is softened and shaped according to a user's dentition or dentition model, a portion corresponding to a molar occlusal surface is in a buccolingual direction. A dentition protection orthodontic appliance characterized in that the dentition protection orthodontic appliance is formed in advance in a convexly bent shape on the molar occlusal surface side, or a lip tongue direction cross section of a part corresponding to the front teeth or canines of the dentition protection orthodontic appliance A dentition protection orthodontic tool characterized in that the dentition protection orthodontic tool is formed in advance in a substantially V-shaped shape, or a dentition protection feature in which a portion corresponding to a molar occlusal surface has a flat surface on an opposing occlusal surface. Orthodontic appliances, or dentition protection orthodontic appliances, characterized in that the thickness of the parts corresponding to the lip side and the tongue side is one half to one sixth of the thickness of the part corresponding to the occlusal surface, or , The height of the part corresponding to the tongue side corresponds to the lip side The dental protection braces, characterized in that an or one-third of the height of the half sites, ensures adhesion to the teeth is readily achieved.

Further, in the step of manufacturing the orthodontic appliance, in the step of manufacturing the orthodontic appliance, a gate provided at an outer edge of a median position on a side corresponding to a lip side surface of the orthodontic appliance to avoid an upper lip girdle is melted. According to a manufacturing method characterized by injecting a resin, a dentition protection orthodontic appliance that can further easily ensure adhesion to a dentition is manufactured.

[0010] In the case of softening the orthodontic appliance of the present invention and shaping the orthodontic appliance according to the user's dentition or dentition model,
The wall of the dentition protector corresponding to the buccal side surface and the lingual side surface is interlocked with the fact that the portion bent convexly toward the molar occlusal surface is deformed in the direction of flattening by pressing, so that the buccal surface or tongue of the molar teeth Since it is deformed in a direction in which it comes into close contact with the side surface, there is an advantage that it is easy to ensure close contact with the dentition.

The cusp of the opposing tooth is fitted into the plane corresponding to the occlusal surface of the opposing tooth at the site corresponding to the occlusal surface of the molar, so that the site is extended in the buccolingual direction and the buccal surface is interlocked. And the wall of the dentition protector corresponding to the tongue side is promoted to be deformed in a direction in which the wall of the dentition is in close contact with the buccal side or the lingual side of the molar. is there.

Further, since the thickness of the portions corresponding to the lip side and the tongue side is one half to one sixth of the thickness of the portion corresponding to the occlusal surface, the portion corresponding to the occlusal surface absorbs shock. There is an advantage that it is easier to ensure the moldability and adhesion to the dentition and the gingiva at the sites corresponding to the lip side and the lingual side while ensuring a sufficient thickness for the lip. The thickness of the portion corresponding to the occlusal surface is preferably 3.0 mm to 6.0 mm. For example, when the thickness is 6.0 mm, the thickness of the portion corresponding to the lip surface and the lingual surface is 3.0 mm to 1.0 mm. 0m
m is preferable.

[0013] Further, since the height of the portion corresponding to the tongue side is one half to one third of the height of the portion corresponding to the lip side, discomfort to the tongue of the portion corresponding to the tongue side is reduced. Small, while the area corresponding to the labial surface is high, so that it adheres to the gingival mucosal surface of the labial surface in a wide area, and it is easier to secure the adhesiveness of the orthodontic appliance to the dental arch. There is. For example, when the height of the portion corresponding to the lip side is 24 mm, the height of the portion corresponding to the tongue side is 8 mm to 1 mm.
It is preferably 2 mm.

Furthermore, in the step of manufacturing the orthodontic appliance, the molten orthodontic appliance is manufactured by injecting molten resin from a gate provided at an outer edge at a median position on a side corresponding to a side surface of the lip and avoiding an upper lip zone. Due to this, when the orthodontic appliance was softened in order to be shaped according to the user's dentition or dentition model, a portion close to the upper lip girdle corresponding to the lip side surface occurred during injection molding. Since the molecular orientation is relaxed and the dimensions shrink in the thickness and vertical directions over a wide range, the entire site corresponding to the labial surface falls down and deforms in the direction in which it adheres to the gingival mucosal surface. There is an advantage that adhesion to the dental arch can be more easily ensured.

In the anterior teeth or canines, the orthodontic appliances of the present invention are softened and pressed, so that the anterior teeth or canines are embedded and fitted into a portion having a substantially V-shaped cross section in the lip tongue direction. Therefore, there is an advantage that adhesion to the dentition can be ensured by a simple operation.

[0016]

Example 1 a) Injection molding of a dental arch orthodontic appliance: The buccolingual cross section of a site corresponding to the left molar part and the right molar dental part of the dental arch orthodontic appliance is as follows:
Injection molding dies each having the shape shown in FIG. 1 and FIG. 2 and manufactured so that the cross-section in the lip tongue direction of the portion corresponding to the front teeth or the canines of the dentition protection orthodontic appliance is shown in FIG. Attached to a screw-in-line injection molding machine, and an ethylene-vinyl acetate copolymer resin (vinyl acetate content 28
(% By weight) at a set heating temperature of 160 ° C., injection-filled into the cavity of the mold, cooled, removed from the mold, and cut off the sprue / runner to obtain the orthodontic appliance with the desired shape. Was.

B) Example of use of the orthodontic appliance: The orthodontic appliance was poured into boiling water at 90 ° C. for 3 minutes, heated and softened, and immediately applied to a user's upper dental gypsum model. Mated,
After applying a thick hard glass plate and pressing to press the dentition protection orthodontic tool to the dentition plaster model and allowing the temperature of the dentition protection orthodontic tool to cool to room temperature and solidify, the dentition plaster model To obtain the intended installed dental protection orthodontic appliance.

[0018]

Example 2 a) Injection molding of a dental arch orthodontic appliance: The buccolingual cross section of a site corresponding to the left molar part and the right molar dental part of the dental arch orthodontic appliance is as follows:
The maximum thickness of the part corresponding to the molar occlusal surface is 6.0 mm, the thickness of the part corresponding to the lip side and the tongue side is 2.0 mm, and the part corresponding to the lip side in the shapes shown in FIGS. The maximum height of the portion corresponding to the lingual surface is 24 mm, the height of the portion corresponding to the tongue side surface is 12 mm, and the lip-lingual section of the portion corresponding to the anterior teeth to the canines has the shape shown in FIG. The thickness and the maximum height of the portion corresponding to the lip surface and the lingual surface are 4.0 mm, and the thickness and the maximum height of the portion corresponding to the molar portion are the same. The injection mold manufactured as shown in FIG. 7 was mounted on a screw in-line type injection molding machine, and ethylene-
Vinyl acetate copolymer resin (vinyl acetate content 28% by weight)
Is melted at a heating set temperature of 160 ° C., injected and filled into the cavity of the mold from a gate provided at the position shown in FIG. 7, cooled, removed from the mold, and separated from the sprue / runner to obtain the desired shape. A dental protection orthodontic appliance was obtained.

B) Example of use of the orthodontic appliance: The orthodontic appliance is poured into hot water at 70 ° C. for 1 minute, heated and softened, and immediately fitted into the upper dentition of the user. Then, after engaging with the lower dentition and holding it for 5 minutes, it was detached from the upper dentition of the user to obtain the intended fitted dental protection orthodontic appliance.

[0020]

According to the orthodontic appliance according to the present invention, the orthodontic orthodontic appliance having high adhesion to the molars, anterior teeth, canines and gingival mucosa surfaces of the user by a one-way pressing operation in the occlusal surface direction. There is an advantage that the tool can be easily obtained.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram for explaining a shape of a cross-section in a buccolingual direction of a portion corresponding to a left molar portion of a dental arch orthodontic appliance according to a first embodiment.

FIG. 2 is an explanatory diagram for explaining a shape of a cross-section in a buccolingual direction of a portion corresponding to a right molar portion of the orthodontic appliance of the first embodiment.

FIG. 3 is an explanatory diagram for explaining a shape of a cross section in a lip tongue direction of a portion corresponding to an anterior tooth to a canine part of the orthodontic appliance according to the first embodiment.

FIG. 4 is an explanatory diagram for explaining a shape of a cross-section in a bucco-lingual direction of a portion corresponding to a left molar portion of the orthodontic appliance of the second embodiment.

FIG. 5 is an explanatory diagram for explaining a shape of a cross-section in a buccolingual direction of a portion corresponding to a right molar portion of the orthodontic appliance of the second embodiment.

FIG. 6 is an explanatory diagram for explaining a shape of a cross section in a lip tongue direction of a portion corresponding to an anterior tooth or a canine part of the orthodontic appliance according to the second embodiment.

FIG. 7 is an explanatory diagram for explaining a shape and a gate position of the orthodontic appliance according to the second embodiment, as viewed from the side of the lips.

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Narimichi Honda 1-2-1, Waki, Waki-cho, Kuga-gun, Yamaguchi Prefecture Inside Mitsui Petrochemical Industry Co., Ltd. (56) References JP-A 2-1257 (JP, A JP-A-51-98194 (JP, A) JP-A-61-100273 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) A61C ^7/ 00-7/08

Claims (6)

(57) [Claims] 1. A dentition protection orthodontic tool which is softened and shaped according to a user's dentition or dentition model, wherein a portion corresponding to a molar occlusal surface is bent in a buccolingual direction to a convex side toward the molar occlusal surface. A dentition protection orthodontic tool, which is formed in a predetermined shape in advance. 2. The orthodontic appliance according to claim 1, wherein a portion corresponding to the front teeth or the canines has a V-shaped cross section in the direction of the lip and tongue. 3. The orthodontic appliance according to claim 1, wherein the portion corresponding to the molar occlusal surface is flat on the side of the opposing occlusal surface. 4. The dentition protection according to claim 3, wherein the thickness of the portion corresponding to the lip surface and the lingual surface is one half to one sixth of the thickness of the portion corresponding to the occlusal surface. Orthodontics. 5. The orthodontic appliance according to claim 4, wherein the height of the portion corresponding to the lingual surface is one half to one third of the height of the portion corresponding to the lip surface. 6. A process for manufacturing a dental protection orthodontic tool which is softened and shaped in accordance with a user's dentition or dentition model, the upper lip zone corresponding to the lip side surface of the dentition protection orthodontic tool. 6. The method for manufacturing a dental arch orthodontic appliance according to claim 4, wherein molten resin is injected from a gate provided at an outer edge of a median position on a side to avoid the problem.