JP2019217248A - Artificial tooth arrangement/adjustment bar - Google Patents

Abstract

To provide an artificial tooth arrangement/adjustment bar that, in single use, enables arrangement/adjustment processing on an artificial tooth and is sanitarily excellent.SOLUTION: An artificial tooth arrangement/adjustment bar 2 comprises a rod-like shaft part 11 and a head part 21 disposed on a tip of the shaft part. The head part includes: a head base part 22 that has a cross-cut cutting blade on its outer peripheral surface and has a shape whose diameter decreases gradually toward its tip; and a head tip part 23 that extends from the tip of the head base part, has a dome-like tip surface, and has a cross-cut cutting blade on its outer surface. The head tip part's area on which the cross-cut cutting blade is formed is separated from the head base part's area on which the cross-cut cutting blade is formed.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a denture arranging / adjusting bar for arranging / adjusting dentures.

  Dentists and dental technicians use a rotary cutting tool to adjust resin products, dentures (dentures), plaster models, and drill denture maintenance holes in the base of dentures. Here, for the drilling, for example, a dental drill as disclosed in Patent Document 1 is used, and for adjustment, for example, a dental bar as disclosed in Patent Document 2 is used.

  As described above, since it is necessary to use a plurality of bars depending on the application, it is necessary to replace the bars according to the process, which is complicated, and the working efficiency is inferior. Further, in the dental drill disclosed in Patent Document 1, there is a problem that the drilling cannot be performed vertically and the drilling is performed diagonally. Therefore, Non-Patent Document 1 discloses a dental bar in which a tip having a small diameter is provided at the tip of a cutting portion electrodeposited with diamond, and a single hole can cut a maintenance hole and cut a base portion. I have. However, the cutting surface of the cutting portion on which the diamond is electrodeposited is clogged with the cutting powder and cutting cannot be performed. Therefore, it is necessary to remove the cutting powder at regular time intervals, which is complicated. In addition, if the dentist adjusts the occlusal adjustment or cuts the base of the denture in the patient's mouth, the diamond abrasive grains peel off and fall off, giving the patient discomfort and also being unfavorable in terms of sanitation. There was a problem.

JP 2012-075696 A JP-T-2003-517350

Yamahachi Dental Industry Co., Ltd. http://www.yamahachi-dental.co.jp/products/14abrasive/17pig_bristles/index.php#toothbur

  The present invention is capable of arranging and adjusting a denture with a single tooth, and easily and vertically drilling a maintenance hole of a denture, and an arrangement of a denture without cutting chips clogging.・ To provide an adjustment bar. At the same time, even if the dentist uses it in the patient's mouth, the abrasive grains do not fall off and do not cause discomfort to the patient. And

The denture arrangement / adjustment bar according to the present invention has a rod-shaped shaft portion,
A head portion arranged at the tip of the shaft portion,
The head has a head base having a cross-cutting cutting blade on the outer peripheral surface and having a shape whose diameter gradually decreases in the distal direction, and a dome-shaped distal surface extending from the distal end of the head base and having an outer surface. And a head tip having a cross-cut cutting blade,
The region of the head end where the cross-cut cutting blade is formed is a denture arrangement / adjustment bar which is separated from the region of the head base where the cross-cut cutting blade is formed.

  With the denture arrangement / adjustment bar according to the present invention, a single denture arrangement / adjustment bar can be used for drilling the maintenance hole of the denture, cutting the denture, and performing occlusal adjustment. There is no need to replace the denture arrangement / adjustment bar.

  The denture arrangement / adjustment bar according to the present invention is a denture arrangement / adjustment bar in which the pitch of the cross-cutting cutting blade at the head end of the denture is different from the pitch of the cross-cutting cutting blade at the base of the head.

  In the case of the denture arrangement / adjustment bar according to the invention, the pitch of the cross-cutting cutting blade at the head tip and the head base is different, and the denture maintenance hole is drilled with one denture arrangement / adjustment bar. It is possible to easily perform the cutting of the denture and the occlusal adjustment, and there is no need to replace the denture arranging / adjusting bar according to the process.

  The diameter of the head end portion of the denture arranging / adjusting bar according to the present invention is a denture arranging / adjusting bar that gradually increases in the distal direction.

  With the denture arrangement / adjustment bar according to the present invention, when the dentist performs occlusal adjustment in the oral cavity of a patient, the occlusal adjustment can be easily performed by inserting the head end portion.

  A denture arrangement / adjustment bar according to the present invention is a denture arrangement / adjustment bar having a head base length of 10 to 20 mm and a maximum diameter of 4 to 10 mm.

  With the denture arranging / adjusting bar according to the present invention, the base portion of the denture can be easily cut.

  The denture arrangement / adjustment bar according to the present invention is a denture arrangement / adjustment bar having a head end portion having a length of 5 to 12 mm and a diameter of 1.4 to 3 mm.

  With the denture arranging and adjusting bar according to the present invention, occlusal adjustment and provision of a maintenance hole for a denture (drilling) can be easily performed.

  The denture arrangement / adjustment bar according to the present invention is a denture arrangement / adjustment bar made of tungsten carbide or zirconia.

  If the denture arranging / adjusting bar is made of tungsten carbide or zirconia, there is no need to clean and remove the cutting debris because the cutting debris will not be clogged as in the case of using diamond as a cutting material. There is no. In addition, since the abrasive grains do not fall off and do not cause discomfort to the patient, and are excellent in hygiene, the dentist can use it in the oral cavity of the patient.

  With the denture arrangement / adjustment bar according to the present invention, it is possible to perform denture arrangement / adjustment processing with a single tooth without replacement according to the process, and the denture arrangement / adjustment bar can be adjusted according to the process. There is no need to change.

FIG. 1 is a schematic perspective view showing a state in which a complete denture is being adjusted and processed using a denture arranging / adjusting bar according to the present invention. FIG. 2 is a plan view showing an embodiment of a denture arrangement / adjustment bar according to the present invention. FIG. 3 is an enlarged view of the head end portion of the embodiment of the denture arranging / adjusting bar according to the present invention. FIG. 4 is a plan view showing a modified example of the embodiment of the denture arrangement / adjustment bar according to the present invention. FIG. 5 is an enlarged view of a head end portion of a modified example of the embodiment of the denture arrangement / adjustment bar according to the present invention.

  Hereinafter, an embodiment of the present invention will be described.

  FIG. 1 shows a state in which a denture arrangement / adjustment bar 2 according to the present embodiment is attached to a handpiece 1 and cutting of a complete denture 3 is performed.

  The handpiece 1 is a substantially columnar body containing a motor (not shown) and has an opening at the tip. The shaft 11 of the denture arrangement / adjustment bar 2 is inserted into this opening, and the rotation is transmitted to the denture arrangement / adjustment bar 2.

  FIG. 2 is a plan view of the denture arrangement / adjustment bar 2 according to the present embodiment. This embodiment is a denture arranging / adjusting bar 2 for molars and premolars.

  The denture arrangement / adjustment bar 2 is formed by cutting a single rod-shaped body made of tungsten carbide, and includes a cylindrical shaft portion 11 and a head portion 21 formed at the tip of the shaft portion 11. The head portion 21 has a head base portion 22 having a shape whose diameter gradually decreases toward the front end, in this embodiment, for example, a shell shape, and a columnar head front end portion 23 extending from the front end of the head base portion 22. . The denture arranging / adjusting bar 2 may have a head portion 21 made of tungsten carbide joined to a shaft portion 11 made of metal such as stainless steel. The material of the head portion 21 may be a hard material capable of cutting and drilling a denture, and is not limited to tungsten carbide. For example, a cemented carbide, zirconia, boron nitride, cermet, or the like may be used. In addition, the head tip portion 23 and the head base portion 22 may be integrally formed using the same material, or may be formed by joining individually formed using a plurality of materials. .

  The head base 22 has an axial length of 10 to 20 mm, a maximum diameter of 4 to 10 mm, and has a cross-cutting cutting blade 26 on the outer peripheral surface. When the length of the head base portion 22 is less than 10 mm, when performing the cutting process of the base portion of the denture, the cutting process cannot be performed over a wide area. When the length exceeds 20 mm, the The cutting surface is too long with respect to the base portion, which lowers the workability, which is not preferable. On the other hand, if the maximum diameter is less than 4 mm, it is not possible to perform cutting in a wide area, and if the maximum diameter exceeds 10 mm, the cut surface is too wide, which is not preferable. The number of blades for cross cutting is 12 to 36 for the right blade and 6 to 26 for the left blade. If the number of blades is less than 12 for the right blade and less than 6 for the left blade, the cutting surface becomes too rough. If the number of right blades is 37 or more and the number of left blades is 27 or more, it is not preferable because the eyes are too fine and the workability of the cutting process deteriorates. The workability of the head base 22 of the denture arranging / adjusting bar 2 for molars and premolars is good when the axial length is 14 mm and the maximum diameter is 6 mm.

  If the shape of the head base portion 22 is a shape in which the diameter gradually decreases toward the tip, in this embodiment, as an example, a cannon shape, it is possible to cut the denture along the shape of the denture, This is preferable because a large area is not required to be cut.

  The total length of the head tip 23 is 5 to 12 mm and the diameter is 1.4 to 3 mm, and the diameter increases gradually from the head base 22 side toward the tip. In addition, a cutting blade 26 that has been cross-cut is provided on the outer peripheral surface of the tip side 1/2 to 4/5. The distal end face 24 of the head distal end portion 23 has a dome shape, and has a slit 25 including two parallel grooves as an example. If the total length of the head tip portion 23 is less than 5 mm, a sufficient cutting surface cannot be secured when performing occlusion adjustment, and if it exceeds 12 mm, the workability is deteriorated because it is too long. On the other hand, when the diameter is less than 1.4 mm, the inner diameter of the drilled maintenance hole is small, and when it exceeds 3 mm, the inner diameter of the maintenance hole is large, which is not preferable. The number of blades for cross cutting is 6 to 20 for the right blade and 4 to 16 for the left blade. If the number of blades is less than 6 for the right blade and less than 4 for the left blade, the cutting surface becomes too rough. When the number of right blades is 21 or more and the number of left blades is 17 or more, the workability of cutting is deteriorated because the eyes are too fine, which is not preferable. In addition, since the number of blades of the cross cut of the head distal end portion 23 and the head base end portion 22 is different from 乃至 to １ ／ of the head distal end portion 23 on the side of the head proximal end portion 22, the cross cut is not performed. Not applied. The workability of the head end portion 23 of the denture arranging / adjusting bar 2 for molars and premolars is good when the axial length is 6 mm and the maximum diameter is 2 mm. In addition, when the diameter of the head distal end portion 23 is gradually increased in the distal direction, when the dentist adjusts the occlusion in the patient's mouth, the head distal end portion can be easily inserted and adjusted. ,preferable. It is preferable that the tip surface 24 of the head tip portion 23 has a dome shape, since a small area can be cut and fine occlusion adjustment can be performed.

  FIG. 3 shows an enlarged view of the head tip 23. (A) is a front view, (B) is a perspective view. The slit 25 in the front end surface 24 of the head front end 23 passes through the center of the front end surface 24 including the two grooves 27. Each groove 27 has an opening width of 0.01 to 0.3 mm and a depth of 0.03 to 0.5 mm. If a slit 25 is provided in the distal end surface 24 of the head distal end portion 23, a maintenance hole can be vertically provided (drilled). However, if the slit 25 is not provided, it is difficult to vertically provide the maintenance hole. Which is not preferred. Note that the number of the slits 25 may be appropriately determined based on the diameter of the head tip 23.

  Next, a denture arranging / adjusting bar 2 for front teeth according to a modification of the embodiment of the present invention will be described.

  FIG. 4 is a plan view of the denture arrangement / adjustment bar 2 for front teeth, and FIG. (A) is a front view, (B) is a perspective view.

  A denture arranging / adjusting bar 2 for front teeth according to a modification of the embodiment of the present invention includes a columnar shaft portion 11 and a head portion 21 formed at the tip of the shaft portion 11, as in the embodiment. The head portion 21 has a head base portion 22 having a bullet-like shape whose diameter gradually decreases toward the front end, and a cylindrical head front end portion 23 extending from the front end of the head base portion 22. The workability of the head base 22 of the denture arranging / adjusting bar 2 for the front teeth is also good when the axial length is 14 mm and the maximum diameter is 6 mm.

  The head tip 23 has a length of 10 mm and a diameter of 1.6 mm, and is suitable for forming a thin and long maintenance hole. Further, the outer peripheral surface of the front end side １ ／ to 有 す る has a cross-cutting cutting blade 26, but has a constant diameter, and has a shape suitable for cutting the anterior denture. Further, the tip end face 24 of the head tip portion 23 has a dome shape and has a slit 25 including one groove 27. The opening width of the groove 27 is 0.01 to 0.3 mm and the depth is 0.03 to 0.5 mm.

  Next, the processing of the denture using the denture arranging and adjusting bar 2 according to the present invention will be described. First, after selecting the denture arrangement / adjustment bar 2 suitable for the tooth to be processed, the shaft portion 11 of the denture arrangement / adjustment bar 2 is inserted into the opening at the tip of the handpiece 1 and fixed. Next, a switch (not shown) of the handpiece is turned on, and the denture arrangement / adjustment bar 2 is rotated. For example, when cutting the base of the denture, the outer peripheral surface of the head base 22 is fixed to the base of the denture. And perform cutting. In addition, when a maintenance hole is provided (drilled) in the denture, the head distal end portion 23 is pressed perpendicularly to the denture to provide the maintenance hole. On the other hand, when adjusting the occlusion, adjustment is performed using the outer peripheral surface of the head distal end portion 23. Therefore, it is possible to perform a series of operations with one denture arrangement / adjustment bar 2, and it is not necessary to replace the denture arrangement / adjustment bar 2 according to the operation process, thereby improving work efficiency. Can be.

  With the denture arrangement / adjustment bar according to the present invention, it is possible to perform the denture arrangement / adjustment processing with one piece without replacing the denture arrangement / adjustment bar 2 according to the operation process. In addition, the maintenance hole of the denture can be easily drilled vertically, and cutting chips are not clogged. At the same time, since the abrasive grains do not fall off and do not cause discomfort to the patient and are excellent in hygiene, the dentist can use it in the oral cavity of the patient.

DESCRIPTION OF SYMBOLS 1 Handpiece 2 Denture arrangement / adjustment bar 3 Complete denture
11 Shaft 21 Head 22 Head base 23 Head tip 24 Tip face 25 Slit 26 Cutting blade 27 Groove

Claims (6)

A rod-shaped shaft,
A head portion disposed at the tip of the shaft portion,
The head portion has a head base portion having a cross-cutting cutting blade on the outer peripheral surface and having a shape whose diameter gradually decreases in the distal direction, and a dome-shaped distal surface extending from the distal end of the head base portion. A head tip having a cross-cutting cutting blade on the surface,
A denture arranging / adjusting bar, wherein a region of the head tip where the cross-cut cutting blade is formed is separated from a region of the head base where the cross-cut cutting blade is formed.   The denture arrangement / adjustment bar according to claim 1, wherein a pitch of the cross-cut cutting blades at the head tip is different from a pitch of the cross-cut cutting blades at the head base.   The bar for denture arrangement / adjustment according to claim 1 or 2, wherein the diameter of the head tip portion increases gradually toward the tip end.   The denture arrangement / adjustment bar according to any one of claims 1 to 3, wherein the head base has a length of 10 to 20 mm and a maximum diameter of 4 to 10 mm.   The denture arrangement / adjustment bar according to any one of claims 1 to 4, wherein the length of the head tip is 5 to 12 mm and the diameter is 1.4 to 3 mm. The denture arrangement / adjustment bar according to any one of claims 1 to 5, wherein a material of the denture arrangement / adjustment bar is tungsten carbide or zirconia.

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