JP3176616U - Implant hole drill - Google Patents

Abstract

An implant hole forming drill for accurately excavating a depth of a buried hole of an artificial tooth root (fixture) for an implant formed in a jawbone to a predetermined depth is provided.
A drill shaft main body 2 provided with a drill shaft portion 3 having a drill blade 3a on an end side and a tool mounting shaft 4 for mounting on a rotary drive tool provided on a distal side, and the drill shaft main body 2 is provided with a stopper mounting portion 5 provided at an intermediate portion in the axial direction, and a cylindrical stopper member 7 rotatably mounted around the axis of the stopper mounting portion 5. The stopper mounting portion 5 is a cylindrical stopper member. 7 is an implant hole forming drill configured to hold 7 at a position where the depth of a target artificial tooth root for embedding is formed.
[Selection] Figure 1

Description

        The present invention relates to an implant hole forming drill for forming an implant hole (embedding hole) in which an implant is embedded in dentistry.

        There is known an implant treatment for implanting an artificial dental root that is an implant in a jawbone and attaching a denture to the artificial dental root to restore mastication and aesthetics. As this artificial tooth root, a screw type or corn type made of titanium called a fixture is used. The formation of the implant hole for embedding the fixture is generally performed using a drill or an osteotome. (For example, see Patent Document 1)

        In addition, the implant hole forming drill previously filed by the applicant is provided with an independent stopper member to make the depth of the implant hole (fixture embedding hole) for embedding the fixture a constant, and the depth of the implant hole is increased. There has been proposed a drill for forming an implant hole for excavating the thickness uniformly. (For example, see Patent Document 2)

JP 2070-313285 A Japanese Patent Application No. 2010-075732

        However, in the method using the drill shown in Patent Document 1, it is difficult to accurately form the depth of the fixture embedded hole for embedding the fixture, and in some cases, the depth of the fixture may be formed more than necessary. There was sex.

        Further, in Patent Document 2, the depth of the drill is set to be approximately constant by meshing the stopper member and the support flange, but since the elasticity is used for fitting on the inclined surface of the meshing portion structure, the depth is deep. The depth cannot be set accurately, resulting in a depth error (deviation), lack of certainty, and uncertain reliability. Further, there is a difficulty such as a risk that an individual difference occurs in attaching / detaching the stopper member and an error occurs in setting the depth.

        Therefore, the present invention is an implant hole in which the predetermined depth of the implant hole (fixture embedding hole) formed in the jawbone can be accurately and reliably formed without individual differences, and the stopper member can be easily attached and detached. The object is to provide a forming drill.

        The present invention eliminates such drawbacks and achieves the above-described object. An implant hole forming drill according to the present invention is attached to a drill shaft portion having a drill blade on the distal end side and a rotary drive tool on the distal end side. A drill shaft main body provided with a tool mounting shaft portion, a stopper mounting portion provided at an intermediate portion in the axial direction of the drill shaft main body and having a screw formed on an outer peripheral wall surface of a stopper flange of the intermediate portion, and A cylindrical stopper member that is screwed with the screw of the stopper mounting portion and is rotatably mounted around the axis after passing, and the cylindrical stopper member is fixed to the fixture by combining the stopper mounting portion and the cylindrical stopper member. An implant hole forming drill characterized by being held at a position to be drilled to an accurate depth.

        According to the implant hole forming drill according to the present invention, when the drill shaft body is rotated to form an embedding hole for implant embedding in the jawbone, the cylindrical stopper member abuts on the jawbone and the axial direction of the drill shaft body Since the advancement to the stop is stopped, by setting the dimension from the stopper reference surface of the stopper flange of the drill shaft to the stopper contact reference surface of the tip of the cylindrical stopper member, the drilling hole can be reliably and accurately Can be formed to a depth dimension. Further, when forming the buried hole in the jawbone, the cylindrical stopper member is not screwed with the screw of the stopper mounting portion even if the drill shaft body is rotated in a state where the cylindrical stopper member is in contact with the jawbone. Therefore, it does not rotate with respect to the jawbone, and the cylindrical stopper member does not damage the jawbone and is not painful.

        Further, the cylindrical stopper member is formed with a cylindrical screw on the inner wall of the end opening to prevent the cylindrical stopper member from being detached from the drill shaft body during driving and to be screwed with the screw of the stopper mounting portion. Therefore, it is very easy to attach and detach, and has the feature that it can be definitely attached and detached in a short time.

It is an explanatory longitudinal cross-sectional view which expands and shows one Example of the drill for implant hole formation which concerns on this invention. FIG. 2 is an enlarged explanatory view of a stopper mounting portion which is a main part of the implant hole forming drill in FIG. 1. It is an expansion explanatory view of the cylindrical stopper member which is the principal part of the drill for implant hole formation in Drawing 1. It is explanatory drawing which expands and shows an Example in addition to the cylindrical cylindrical stopper member which is the principal part of the drill for implant hole formation which concerns on this invention.

        Hereinafter, an embodiment of the drill for forming an implant hole according to the present invention will be described in detail. FIG. 1 schematically shows the overall structure of an implant hole forming drill according to the present invention. Reference numeral 1 denotes an implant hole forming drill, which comprises a drill shaft main body 2 and a cylindrical stopper member 7.

        More specifically, as shown in FIGS. 1, 2 and 3, the drill shaft body 2 includes a drill shaft portion 3, a drill blade 3 a provided on the distal end side thereof, and a rotary drive tool (not shown) provided on the distal end side. A tool mounting shaft portion 4 that is detachably mounted is provided. At the end of the tool mounting shaft portion 4, a chuck portion 4 a that is attached and fixed to an air-type or electric-type rotary drive tool such as a motor is provided.

        Further, as shown in FIG. 1 and FIG. 2 in an enlarged manner, a stopper mounting portion 5 is provided at an intermediate portion in the vertical axis direction of the drill shaft body 2. This stopper mounting portion 5 is integrally provided with a small diameter shaft portion 1a located between the drill shaft portion 3 and the tool mounting shaft portion 4, and a disk-like stopper flange 6 at an intermediate portion in the longitudinal axis direction of the small diameter shaft portion 1a. A screw 6a (in this case, a male screw) is engraved on the outer peripheral wall surface, and the surface on the drill blade 3a side, that is, the tip surface is caused to function as the stopper reference surface 6b. The screw 6a is detachably screwed with a female screw of a cylindrical stopper member 7 described below.

        The cylindrical stopper member 7 has an insertion hole 8 into which the drill shaft main body 2 is inserted and a diameter larger than the inner diameter of the insertion hole 8 as shown in FIG. A cylindrical screw 8a provided so as to be engaged with the screw 6a; a diameter larger than the stopper flange 6 on the distal end side of the cylindrical screw 8a and a diameter larger than the cylindrical screw 8a; This is formed from a stopper-free cylindrical gap 8b for the purpose of holding the cylindrical stopper member 7 in a free state at a set excavation depth. The drill shaft main body 2 is brought into contact with the stopper reference surface 6b of the stopper flange 6 and the drill shaft main body 2 moves forward to the jaw bone (not shown) by using the distal end surface side of the cylindrical gap 8b as a stopper contact reference surface 8c. Thus, the wheel rotates idly at this position. At this time, the distal end surface 7a of the cylindrical stopper member 7 is in contact with a jawbone (not shown).

        More specifically, in the implant hole forming drill 1 according to the present invention, the distal end surface 7a of the cylindrical stopper member 7 hits the jawbone, and the stopper contact reference surface 8c of the cylindrical gap 8b of the cylindrical stopper member 7 and the aforementioned The jaw flange is excavated by rotating it until it comes into contact with the stopper reference surface 6b of the stopper flange 6. After the contact, the jaw bone is not excavated even if the implant hole forming drill 1 is rotated. It is.

        Here, an example of an implant hole forming drill 1 according to the present invention, for example, the main dimensional relationship when assuming that the diameter of the drill shaft 3 is D and the length is L will be briefly described. In FIG. 3, if the diameter D of the drill shaft 3 is set to 2,8 mmφ, for example, D <D1, D1 <D2, D2> D3, D ≦ D3, and the length L of the drill shaft 3 is For example, it is about 15 mm. The length (thickness) t of the stopper flange 6 is about 1 mm, and the length of the small diameter shaft portion 1a is about 1.5 mm.

        As an example of the cylindrical stopper member 7, for example, the length of the cylindrical screw 8 a is 1 mm and the stopper-free cylindrical gap portion 8 b because of the depth relationship between the drill shaft 3 and the excavation hole excavated in the jawbone. The length (width C) is t <C, the excavation depth A = LB, the total length of the cylindrical stopper member 7 is about 11 mm, the diameter of the cylindrical stopper member 7 is 5 mmφ, and the diameter of the insertion hole 8 Is formed in a relationship of 2,8 mmφ. Although the diameter D of the drill shaft 3 and the diameter D3 of the insertion hole 8 of the cylindrical stopper member 7 are approximately the same size, the machining accuracy is such that there is a gap through which the drill shaft 3 can rotate. The diameter and length L of the drill 1, the length B of the cylindrical stopper member 7, and the diameter D3 of the insertion hole 8 are variously formed according to the purpose such as the depth of the excavation hole for digging the jawbone. Of course, the total length of the cylindrical stopper member 7 is set according to the purpose.

        Next, the procedure for using the implant hole forming drill 1 according to the present invention will be described in detail with reference to the drawings. First, it is assumed that an implant implantation hole having a target depth and diameter is drilled in the jawbone, although not shown. Therefore, the chuck portion 4a of the tool mounting shaft portion 4 of the drill shaft body 2 is attached to a rotary drive tool (not shown). Next, the end opening 7b of the cylindrical stopper member 7, the cylindrical screw 8a, the cylindrical gap 8b, and the insertion hole 8 are inserted in this order from the direction of the drill blade 3a of the drill shaft portion 3 of the implant hole forming drill 1, The cylindrical screw 8a is screwed with the screw 6b of the stopper flange 6, and then passes through the cylindrical screw portion 8a, and the cylindrical stopper member 7 is held in a free state in the air gap of the cylindrical gap portion 8b. To do.

        Then, the drill 1 for implant hole formation which concerns on this invention is rotated with a rotary drive tool, and it begins to dig a drilling hole with the drill blade 3a of the above-mentioned drill axial part 3 to a jawbone. Then, when excavating to a target depth, for example, the depth A in FIG. 1, that is, the tip surface 7a which is the tip of the cylindrical stopper member 7 contacts the jawbone at the target depth A = LB. The rotation of the cylindrical stopper member 7 is stopped, the jawbone is not damaged, and the patient is not in pain. Of course, the drill shaft portion 3 does not move forward, the drill shaft portion 3 is idled, and the jawbone excavation is also stopped. That is, the stopper reference surface 6b of the stopper flange 6 and the stopper contact reference surface 8c of the cylindrical stopper member 7 are in contact with each other.

        What has been described above is the best mode of the drill 1 for forming an implant hole according to the present invention. As shown in FIG. 4, the cylindrical stopper member 7 has a shape with a difference in diameter from the tip to the end. It is also possible to make it easier to identify differences in diameter and length. Of course, the insertion hole 8, the cylindrical screw portion 8a, and the cylindrical gap portion 8b have the same dimensional relationship as described above.

DESCRIPTION OF SYMBOLS 1 Implant hole formation drill 2 Drill shaft main body 3 Drill shaft part 4 Tool mounting shaft part 5 Stopper mounting part 6 Stopper flange 7 Cylindrical stopper member 8 Insertion hole 8b Cylindrical space part

Claims (3)

      A drill shaft main body provided with a drill shaft portion having a drill blade on the distal end side, an attachment shaft portion attached to the rotary drive tool on the distal end side, and a stopper mounting portion provided in an intermediate portion in the axial direction of the drill shaft main body, A cylindrical stopper member rotatably mounted about the axis of the stopper mounting portion, and the stopper mounting portion holds the cylindrical stopper member at a position where the depth of the set excavation hole is formed. A drill for forming an implant hole.       The stopper mounting portion is formed of a cylindrical stopper flange having a diameter larger than that of the drill shaft portion and a small diameter shaft of the drill shaft portion, and a screw is engraved on an outer peripheral wall of the stopper flange. The drill for forming an implant hole according to claim 1, wherein the distal end surface is a stopper reference surface.       The cylindrical stopper member is formed with an insertion hole penetrating the drill shaft portion at an axial center, and a cylindrical screw that is screwed with the screw from a terminal opening of the insertion hole toward a distal end surface that contacts the jawbone. Forming a cylindrical gap portion provided with a stopper contact reference surface for stopping the advancement of the drill shaft main body, and rotatably holding the stopper flange on the tip surface side of the cylindrical screw; The length from the front end surface of the stopper member to the stopper reference surface of the stopper mounting portion is set to the excavation depth of the implant hole, according to any one of claims 1 and 2. Implant hole drill.

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