JP6411234B2 - Dental implant removal device - Google Patents

Description

  The present invention relates to a dental implant removal device.

  Conventionally, dental implant implantation surgery has been performed to restore the occlusal function, vocalization function, aesthetics, and the like by implanting a fixture as a dental implant into the alveolar bone of the maxilla and mandible (for example, Patent Documents) 1).

  By the way, the embedded fixture may be removed from the alveolar bone for reasons such as infection. The fixture is normally removed by fitting the tip end of the pin to the fitting portion of the fixture to which the abutment is fitted and rotating the pin.

  However, when removing the fixture by rotating the pin, the pin may be forcibly rotated to deform or damage the fitting part of the fixture, or damage may be caused by applying external force to the surrounding tissue of the fixture. It was. Therefore, there has been a demand for an instrument that can smoothly remove a dental implant such as a fixture.

JP 2010-188062 A

  The subject of this invention is providing the dental implant extraction tool which can extract a dental implant smoothly.

As a result of intensive studies to solve the above-mentioned problems, the present inventors have found a solution means having the following constitution and have completed the present invention.
(1) A first pin having a male threaded portion that can be screwed into a female threaded portion of a dental implant at the distal end, and a first pin having a fitting portion that can be fitted to the fitted portion of the dental implant. 2 pins, an angle correction member having an insertion hole through which each of the first pin and the second pin can be inserted, an upper surface, a lower surface, and an inner diameter larger than the outer diameter of the angle correction member, which are located on the upper surface Each of the first pin and the second pin has a concave mounting portion that penetrates from the bottom of the mounting portion to the lower surface and has an inner diameter smaller than the outer diameter of the angle correction member. A stent having a through-hole through which can be inserted, a locking portion extending from the lower surface, and a fixing means for fixing the angle correction member to the placement portion, the female screw portion and the mated portion The central axis of each part It is located on the central axis of the dental implant, and when the first pin and the second pin are respectively inserted through the insertion holes of the angle correction member, each of the first pin and the second pin A dental implant removal device for fixing the angle correction member to the mounting portion by the fixing means at an angle at which a rotation axis is collinear with the central axis of the dental implant.
(2) The angle of the angle correction member is inserted into the insertion hole of the angle correction member by inserting the first pin screwing the male screw portion into the female screw portion of the dental implant. The dental implant extraction device according to (1), which is adjusted.
(3) When the first pin and the second pin are inserted through the insertion holes of the angle correction member, respectively, the first pin and the second pin and the insertion hole of the angle correction member The dental implant extraction device according to (1) or (2), wherein an interval between them is 0.05 mm or less.
(4) The dental implant extraction device according to any one of (1) to (3), wherein the dental implant is at least one selected from a fixture, an abutment screw, a cover cap, and a healing cap.
(5) The dental implant extraction device according to any one of (1) to (3), wherein the dental implant is a fixture.
(6) The dental implant extraction device according to any one of (1) to (5), wherein the first pin has lower strength than the second pin.
(7) The first pin further includes a columnar first main body portion positioned on the rear end side of the male screw portion, and the second pin has a rear end rather than the fitting portion. The dental implant extraction device according to any one of (1) to (6), further including a columnar second main body portion positioned on the portion side.
(8) The dental implant extraction device according to any one of (1) to (7), wherein an outer diameter of the first pin and an outer diameter of the second pin are the same.
(9) The dental implant extraction device according to any one of (1) to (8), wherein a height of the angle correction member is 2 mm or more.
(10) The locking portion includes a first locking portion and a second locking portion that are positioned so as to face each other across the through hole, and the first locking portion and the second locking portion. The stop part is a dental implant extraction device according to any one of (1) to (9), wherein each stop part extends downward from the vicinity of the edge of the lower surface.
(11) The dental implant removal device according to any one of (1) to (10), wherein the fixing means is a dental resin.
(12) The dental implant extraction device according to any one of (1) to (11), further including a driver that rotates each of the first pin and the second pin.

  ADVANTAGE OF THE INVENTION According to this invention, there exists an effect that a dental implant can be extracted smoothly.

It is a schematic explanatory drawing which shows the dental implant extraction tool which concerns on one Embodiment of this invention. It is a figure which shows the state which attached the 1st pin and 2nd pin with which the dental implant extraction instrument shown in FIG. 1 is each attached to the fixture, (a) is schematic description which shows the state which attached the 1st pin to the fixture. FIG. 4B is a schematic explanatory view showing a state where the second pin is attached to the fixture. It is a figure which shows the angle correction member with which the dental implant extraction instrument shown in FIG. 1 is provided, (a) is a top view, (b) is the sectional view on the AA line of (a). It is a schematic explanatory drawing which shows the 1st pin with which the dental implant extraction instrument shown in FIG. 1 is equipped, a 2nd pin, an angle correction member, and a stent. It is a figure which shows the fixture which concerns on one Embodiment of this invention, (a) is a side view, (b) is a partially broken sectional view, (c) is a B arrow enlarged plan view of (b). (A)-(c) is a schematic explanatory drawing which shows the dental implant extraction method which concerns on one Embodiment of this invention. (D)-(f) is a schematic explanatory drawing which shows the dental implant extraction method which concerns on one Embodiment of this invention. It is a schematic explanatory drawing which shows the dental implant extraction tool which concerns on other embodiment of this invention, and is a figure equivalent to FIG.6 (c).

<Dental implant removal device>
Hereinafter, a dental implant extraction device according to an embodiment of the present invention will be described in detail with reference to FIGS. 1 to 5 by taking as an example a case where a dental implant is a fixture.

  As shown in FIG. 1, the dental implant removal device 10 of this embodiment is a device for removing the fixture 100 from the alveolar bone 110. The fixture 100 of this embodiment has the recessed part 101 located in the rear-end part 100b, as shown in FIG. The concave portion 101 includes a female screw portion 102 and a fitted portion 103 in order from the distal end portion 100 a side of the fixture 100.

  The female screw portion 102 is a so-called screw hole, and is a portion into which the abutment screw is screwed. The abutment screw is a member that fixes the abutment to the fixture 100. An abutment is a member that connects artificial teeth to the fixture 100.

  The female screw portion 102 has a central axis O102 positioned on the central axis O of the fixture 100. According to such a configuration, as shown in FIG. 2A, when the male screw portion 11 of the first pin 1 described later is screwed into the female screw portion 102, the rotation axis S1 of the first pin 1 is fixed. It is on the same straight line as the central axis O of the char 100.

  As shown in FIG. 5, the center axis O of the fixture 100 is an axis that penetrates the front end portion 100a and the rear end portion 100b of the fixture 100, and becomes a rotation axis when the fixture 100 is rotated. It shall mean the axis. The central axis O102 of the female screw portion 102 is an axis that penetrates both ends of the female screw portion 102 in the direction along the central axis O of the fixture 100, and is an axis that becomes a rotation axis when the female screw portion 102 is rotated. Means.

  On the other hand, the fitted portion 103 is a substantially cylindrical portion that prevents the abutment from being fitted and the abutment from rotating with respect to the fixture 100. The shape of the fitted portion 103 is not particularly limited, and may be, for example, a polygonal tube shape such as a hexagonal tube shape or an octagonal tube shape, or a so-called hex lobe shape. The shape of the fitted part 103 of this embodiment is a hexagonal cylinder shape.

  The fitted portion 103 has a central axis O103 located on the central axis O of the fixture 100, like the female screw portion 102 described above. According to such a configuration, as shown in FIG. 2B, when the fitting portion 21 of the second pin 2 described later is fitted to the fitted portion 103, the rotation axis S <b> 2 of the second pin 2 is It is on the same straight line as the central axis O of the fixture 100. The center axis O103 of the fitted portion 103 is an axis that penetrates both ends of the fitted portion 103 in the direction along the central axis O of the fixture 100, and when the fitted portion 103 is rotated. It shall mean the axis which becomes a rotation axis.

  As shown in FIG. 1, the fixture 100 has a screw portion 104 on the outer peripheral portion thereof, and is embedded while being screwed into the alveolar bone 110 by self-tapping in a dental implant implantation operation. The dental implant removal device 10 of the present embodiment is for removing such a fixture 100 from the alveolar bone 110, and includes a first pin 1, a second pin 2, an angle correction member 3, and a stent 4. And the fixing means 5 is provided. Hereinafter, each component of the dental implant extraction instrument 10 of this embodiment will be described in order.

(1st pin)
The first pin 1 is a member that pivots the fixture 100, and is a member that is used when adjusting the angle of the angle correction member 3 to a specific angle in the placement portion 43 of the stent 4 described later. The 1st pin 1 of this embodiment is what is called a screw pin, and has the external thread part 11 in the front-end | tip part 1a. As shown in FIG. 2A, the male screw portion 11 is configured to be screwable with the female screw portion 102 of the fixture 100 described above.

  In addition, as shown in FIG. 1, the first pin 1 of the present embodiment further includes a columnar first main body portion 12 positioned on the rear end portion 1 b side of the first pin 1 with respect to the male screw portion 11. Have. In the present embodiment, the first main body portion 12 is continuous with the male screw portion 11. In addition, between the 1st main-body part 12 and the external thread part 11, the other site | part which comprises the 1st pin 1 may exist.

  Examples of the constituent material of the first pin 1 include, but are not limited to, stainless steel (SUS), titanium alloy, and cobalt-chromium alloy. Since the first pin 1 is not required to be stronger than the second pin 2 described below, the first pin 1 can be made of a material having a lower strength than the second pin 2. According to such a structure, since the 1st pin 1 can be comprised with a comparatively cheap material, cost can be reduced. Further, the surface of the first pin 1 may be subjected to a coating process on a metal surface such as an anodizing process or an oxide film formation by laser. In particular, if the coating process is performed so that the surface of the first pin 1 has a different color from the surface of the second pin 2, the first pin 1 and the second pin 2 can be clearly distinguished. Can be suppressed.

(2nd pin)
The second pin 2 is a member used when the fixture 100 is removed from the alveolar bone 110 by applying the rotational force to the fixture 100. As shown in FIG. 1, the 2nd pin 2 of this embodiment has the fitting part 21 in the front-end | tip part 2a. As shown in FIG. 2B, the fitting portion 21 is configured to be fitted to the fitting portion 103 of the fixture 100 described above. In this embodiment, since the shape of the to-be-fitted part 103 of the fixture 100 is a hexagonal cylinder shape as above-mentioned, the shape of the fitting part 21 of the 2nd pin 2 is a hexagonal column shape.

  Further, as shown in FIG. 1, the second pin 2 of the present embodiment further includes a columnar second main body portion 22 located on the rear end portion 2 b side of the second pin 2 with respect to the fitting portion 21. Have. In the present embodiment, the second main body portion 22 is continuous with the fitting portion 21. In addition, between the 2nd main-body part 22 and the fitting part 21, the other site | part which comprises the 2nd pin 2 may exist.

  Examples of the constituent material of the second pin 2 include, but are not limited to, SUS, titanium alloy, cobalt-chromium alloy, and the like. When a cobalt-chromium alloy is employed among the exemplified constituent materials, the strength of the second pin 2 is improved, so that the second pin 2 can be prevented from being deformed or damaged when the fixture 100 is removed. . Further, similarly to the first pin 1, the surface of the second pin 2 may be subjected to a coating process on the metal surface such as an anodic oxidation process or oxide film formation by laser.

(Angle correction member)
As shown in FIG. 3, the angle correction member 3 is a substantially plate-like member having an insertion hole 33. Further, as shown in FIG. 6B described later, the angle correction member 3 inserts the first pin 1 screwed into the female screw portion 102 of the fixture 100 into the insertion hole 33. Thus, the second angle is adjusted so that the rotation axis S2 of the second pin 2 is positioned on the same straight line as the central axis O of the fixture 100, as shown in FIG. It functions as a member for correcting the angle of the pin 2.

  As shown in FIG.3 (b), it is preferable that the height H of the angle correction member 3 is 2 mm or more. According to such a configuration, the angle of the second pin 2 can be accurately corrected. The upper limit of the height H of the angle correction member 3 is preferably 5 mm or less, but is not limited to this.

  The insertion hole 33 penetrates the angle correction member 3 in the height H direction, and is configured to be able to insert each of the first pin 1 and the second pin 2. The insertion hole 33 of the present embodiment is located at the center of each of the upper surface 31 and the lower surface 32 of the angle correction member 3.

  Here, as shown in FIG. 6C described later, when the first pin 1 is inserted into the insertion hole 33, the interval between the first pin 1 and the insertion hole 33 is 0.05 mm or less. Is preferred. Further, as shown in FIG. 7E described later, when the second pin 2 is inserted into the insertion hole 33, the interval between the second pin 2 and the insertion hole 33 is 0.05 mm or less. preferable. In other words, as shown in FIG. 4, the value calculated from the formula: (inner diameter D3a of insertion hole 33) − (outer diameter D1 of first pin 1) is preferably 0.05 mm or less. Similarly, the value calculated from the formula: (inner diameter D3a of insertion hole 33) − (outer diameter D2 of second pin 2) is preferably 0.05 mm or less. According to these configurations, when the first pin 1 is inserted into the insertion hole 33, it is possible to prevent the first pin 1 from rattling in the insertion hole 33. Further, when the second pin 2 is inserted into the insertion hole 33, it is possible to prevent the second pin 2 from rattling in the insertion hole 33.

  In the present embodiment, from the viewpoint of facilitating the design of the insertion hole 33, the outer diameter D1 of the first pin 1 and the outer diameter D2 of the second pin 2 are the same. The outer diameter D1 of the first pin 1 and the outer diameter D2 of the second pin 2 may be the same as long as the outer diameters D1 and D2 are substantially the same. The outer diameter D1 of the first pin 1 means the maximum dimension of the first pin 1 in the direction perpendicular to the rotation axis S1. The outer diameter D2 of the second pin 2 is also defined in the same manner as the outer diameter D1 of the first pin 1. In the present embodiment, the first pin 1 has the maximum dimension in the first main body portion 12, and the second pin 2 has the maximum dimension in the second main body portion 22. In addition, the 1st pin 1 may have the largest dimension in the external thread part 11, and may have the maximum dimension in both the external thread part 11 and the 1st main-body part 12. FIG. Similarly, the second pin 2 may have a maximum dimension in the fitting part 21, or may have a maximum dimension in both the fitting part 21 and the second main body part 22. Moreover, you may make it the outer diameter D1 of the 1st pin 1 and the outer diameter D2 of the 2nd pin 2 differ as needed.

  The lower limit value of the distance between the first pin 1 and the insertion hole 33 when the first pin 1 is inserted through the insertion hole 33 is preferably 0.005 mm or more. Similarly, the lower limit value of the distance between the second pin 2 and the insertion hole 33 when the second pin 2 is inserted through the insertion hole 33 is preferably 0.005 mm or more. According to these structures, the 1st pin 1 can rotate smoothly in the insertion hole 33 on the basis of the rotating shaft S1. Moreover, the 2nd pin 2 can also rotate smoothly in the insertion hole 33 on the basis of the rotating shaft S2.

  In addition, as shown in FIG. 3A, the angle correction member 3 of the present embodiment has a substantially annular shape when viewed in plan, but is not limited thereto. As the shape of the angle correction member 3 when seen in a plan view, other shapes such as a substantially quadrangular ring shape can be adopted as long as the effect is obtained.

  Examples of the constituent material of the angle correction member 3 include, but are not limited to, SUS, titanium alloy, cobalt-chromium alloy, and the like.

(Stent)
As shown in FIG. 1, the stent 4 is a substantially plate-like member attached to a patient's tooth adjacent to the fixture 100, that is, a patient's adjacent tooth 111. The stent 4 has an upper surface 41, a lower surface 42, a placement portion 43, a through hole 44, and a locking portion 45.

  As shown in FIG. 4, the placement portion 43 is a concave portion that is located on the upper surface 41 and has an inner diameter D43 that is larger than the outer diameter D3b of the angle correction member 3. The through hole 44 penetrates from the bottom 431 to the lower surface 42 of the mounting portion 43 and has an inner diameter D44 smaller than the outer diameter D3b of the angle correction member 3. According to these configurations, the outer diameter D3b of the angle correction member 3, the inner diameter D43 of the mounting portion 43, and the inner diameter D44 of the through hole 44 have a relationship of D43> D3b> D44. The angle correction member 3 can be placed. The outer diameter D3b of the angle correction member 3 means the maximum dimension of the angle correction member 3 when the angle correction member 3 is viewed in plan.

  The through hole 44 is configured to allow the first pin 1 and the second pin 2 to be inserted therethrough. According to such a configuration, the first pin 1 and the second pin 2 can be inserted through the through holes 44 respectively, and the tip portions 1 a and 2 a can be exposed from the lower surface 42.

  The inner diameter D44 of the through hole 44 is preferably 1.5 to 5.0 times the outer diameter D1 of the first pin 1. According to such a configuration, the inner diameter D44 of the through hole 44 is appropriately larger than the outer diameter D1 of the first pin 1, and the first pin 1 is inserted into the through hole 44 from directly above or obliquely from the through hole 44. It becomes possible to do. Therefore, as shown in FIG. 6A to be described later, the first pin 1 is inserted into the through hole 44 and the male screw portion 11 of the first pin 1 is screwed into the female screw portion 102 of the fixture 100. Workability at the time can be improved.

  As shown in FIG. 1, the locking portion 45 is a portion extending from the lower surface 42, and is configured to be locked to the adjacent tooth 111. Therefore, the stent 4 is attached to the adjacent tooth 111 by locking the locking portion 45 to the adjacent tooth 111. The locking portion 45 of the present embodiment includes a first locking portion 451 and a second locking portion 452 that are positioned so as to face each other with the through hole 44 interposed therebetween. Both the first locking portion 451 and the second locking portion 452 extend downward from the vicinity of the edge of the lower surface 42.

  The stent 4 having the above-described configuration may be configured with, for example, a general interdental dimension, may be configured with an impression in the patient's oral cavity in advance, or scan data is used. Then, it may be produced by CAD-CAM or additive manufacturing.

  Examples of the constituent material of the stent 4 include SUS, titanium alloy, and resin (resin). Examples of the resin include acrylic resin such as polymethyl methacrylate (PMMA), and Teflon (registered trademark). However, it is not limited to these.

(Fixing means)
As shown in FIG. 1, the fixing means 5 fixes the angle correction member 3 to the mounting portion 43 at a specific angle. Examples of the fixing means 5 include dental resins such as cement and resin. The cement may be a dual cure type or a photopolymerization type. Examples of the resin include acrylic resins such as PMMA.

  Here, in the dental implant removal device 10 of the present embodiment including the above-described constituent members, the first pin 1 is inserted into the insertion hole 33 of the angle correction member 3 as shown in FIG. 1 and FIG. The angle correction member 3 is fixed to the mounting portion 43 by the fixing means 5 at an angle at which the rotation axis S1 of the first pin 1 is located on the same straight line as the central axis O of the fixture 100. Further, as shown in FIG. 1 and FIG. 7E described later, when the second pin 2 is inserted into the insertion hole 33 of the angle correction member 3, the rotation axis S <b> 2 of the second pin 2 is the central axis of the fixture 100. The angle correction member 3 is fixed to the mounting portion 43 by the fixing means 5 at an angle located on the same straight line as O. According to these configurations, the fitting portion 103 of the fixture 100 is deformed or damaged by reducing the torque generated when the fixture 100 is extracted, as will be described in detail in a dental implant extraction method described later. Can be suppressed. Further, since the fixture 100 can be extracted along the direction of the central axis O, the fixture 100 can be smoothly extracted from the alveolar bone 110 while suppressing damage to the surrounding tissue of the fixture 100.

<Dental implant removal method>
Next, regarding a dental implant extraction method according to an embodiment of the present invention, a case where the fixture 100 is extracted from the alveolar bone 110 using the dental implant extraction device 10 described above will be described as an example with reference to FIGS. This will be described in detail with reference to FIG. 6 and 7, the same components as those in FIGS. 1 to 5 described above may be denoted by the same reference numerals and description thereof may be omitted.

  First, as shown in FIG. 6A, the locking portion 45 of the stent 4 is locked to the adjacent tooth 111 and the stent 4 is attached to the adjacent tooth 111. Next, the fixture 100 is centered using the first pin 1. Specifically, the first pin 1 is inserted into the through-hole 44 of the stent 4, the distal end portion 1 a is exposed from the lower surface 42 of the stent 4, and the male screw portion 11 of the first pin 1 is connected to the fixture 100. Screwed into the female screw portion 102. As a result, the rotation axis S <b> 1 of the first pin 1 is collinear with the central axis O of the fixture 100. When the fixture 100 is centered using the second pin 2 without using the first pin 1, the fitting portion 21 of the second pin 2 is replaced with the fitted portion 103 of the fixture 100. However, it is difficult to accurately align the fixture 100 by fitting. In the present embodiment, since the male screw portion 11 of the first pin 1 is screwed into the female screw portion 102 of the fixture 100, the fixture 100 is pivoted, so that the pivoting can be accurately performed. It becomes possible.

  Next, as shown in FIG. 6B, the angle correction member 3 is placed on the placement portion 43 of the stent 4 while the first pin 1 is inserted through the insertion hole 33. Accordingly, the angle correction member 3 is placed on the placement portion 43 at an angle at which the rotation axis S1 of the first pin 1 is located on the same straight line as the center axis O of the fixture 100.

  Then, as shown in FIG. 6C, the angle correction member 3 in this state is fixed by the fixing means 5. Thereby, the angle correction member 3 is fixed to the mounting portion 43 at an angle at which the rotation axis S1 of the first pin 1 is located on the same straight line as the center axis O of the fixture 100. In other words, when the first pin 1 is inserted into the insertion hole 33 of the angle correction member 3, more specifically, the first pin 1 is inserted into the insertion hole 33 of the angle correction member 3 and the male of the first pin 1 is inserted. When the screw portion 11 is screwed into the female screw portion 102 of the fixture 100, the angle correction member 3 is fixed at an angle at which the rotation axis S1 of the first pin 1 is located on the same straight line as the central axis O of the fixture 100. It is fixed to the mounting part 43 by means 5.

  Next, the threaded state of the male screw portion 11 and the female screw portion 102 is released, and the first pin 1 is inserted into the through hole 44 of the stent 4 and the insertion hole 33 of the angle correction member 3 as shown in FIG. Extract in the order of. Then, instead of the first pin 1, the second pin 2 is inserted into the insertion hole 33 of the angle correction member 3. At this time, the angle correction member 3 is fixed to the mounting portion 43 at an angle at which the rotation axis S1 of the first pin 1 is collinear with the center axis O of the fixture 100. Is inserted into the insertion hole 33 of the angle correction member 3, the rotation axis S <b> 2 of the second pin 2 is also collinear with the central axis O of the fixture 100. In other words, when the second pin 2 is inserted into the insertion hole 33 of the angle correction member 3, more specifically, the second pin 2 is inserted into the insertion hole 33 of the angle correction member 3 to fit the second pin 2. When the joint portion 21 is fitted to the fitted portion 103 of the fixture 100, the angle correction member 3 is at an angle at which the rotation axis S2 of the second pin 2 is located on the same straight line as the central axis O of the fixture 100. It is fixed to the mounting portion 43 by the fixing means 5. Therefore, as shown in FIG. 7 (e), the second pin 2 is inserted through the insertion hole 33 of the angle correction member 3 and the through hole 44 of the stent 4 in this order, and the distal end portion 2 a is exposed from the lower surface 42 of the stent 4. Thus, when the fitting portion 21 of the second pin 2 is fitted to the fitting portion 103 of the fixture 100, the rotation axis S <b> 2 of the second pin 2 is collinear with the central axis O of the fixture 100.

  Then, as shown in FIG. 7 (f), the second pin 2 is rotated in the direction of arrow C with reference to the rotation axis S 2, and the fixture 100 is removed from the alveolar bone 110. At this time, according to the present embodiment, the rotational axis S2 of the second pin 2 is positioned on the same straight line as the central axis O of the fixture 100, so that the rotational force of the second pin 2 is reliably fixed. Since it is added to 100, the torque generated when the fixture 100 is removed can be reduced, and as a result, deformation or breakage of the fitted portion 103 of the fixture 100 can be suppressed. Further, since the fixture 100 can be extracted along the direction of the arrow D along the direction of the central axis O, the fixture 100 can be smoothly extracted from the alveolar bone 110 while suppressing damage to the surrounding tissue of the fixture 100. can do.

  In the present embodiment, when the fixture 100 is removed from the alveolar bone 110, the second pin 2 is rotated in the direction of arrow C that is counterclockwise, but this is not a limitation. That is, the rotation direction of the second pin 2 may be a direction that loosens the fastening of the fixture 100. Further, the order in which the fixture 100 is extracted by the dental implant extraction device 10 is not limited to the above-described order as long as the fixture 100 can be extracted, and can be appropriately changed.

  As mentioned above, although preferred embodiment which concerns on this invention was illustrated, this invention is not limited to embodiment mentioned above, It cannot be overemphasized that it can be made arbitrary, unless it deviates from the summary of this invention.

  For example, in the above-described embodiment, the case where the dental implant is the fixture 100 has been described as an example. Can be used as well. Examples of dental implants other than the fixture 100 include an abutment screw, a cover cap, and a healing cap.

  In the above-described embodiment, the case where the fixture 100 is extracted from the alveolar bone 110 using the dental implant extraction device 10 of the present embodiment has been described as an example. However, the dental implant extraction of the present embodiment is described. The instrument 10 can also be used when the fixture 100 is embedded in the alveolar bone 110.

In the above-described embodiment, the configuration in which the locking portion 45 of the stent 4 includes the first locking portion 451 and the second locking portion 452 has been described. Instead, the configuration illustrated in FIG. Can do. That is, in the dental implant removal device 10 ′ shown in FIG. 8, the locking portion 46 of the stent 4 ′ extends in a cylindrical shape downward from the vicinity of the opening of the through hole 44 in the lower surface 42. If it demonstrates more concretely, the latching | locking part 46 of this embodiment is following the internal peripheral surface of the through-hole 44, and is comprised by the cylindrical shape. Even with such a configuration, the locking portion 46 can be locked to the adjacent tooth 111 and the stent 4 ′ can be attached to the adjacent tooth 111. In addition, as long as the latching | locking part 46 can be latched to the adjacent tooth | gear 111, it does not need to be continuous with the internal peripheral surface of the through-hole 44, and may be comprised by cylinder shapes other than cylindrical shape.
Other configurations are the same as those of the dental implant extraction device 10 according to the above-described embodiment, and thus the description thereof is omitted.

  In the above-described embodiment, the dental implant removal device 10 may further include a driver. The driver is a member that rotates each of the first pin 1 and the second pin 2. The driver may be electrically powered to which a contra head can be attached.

  In the above-described embodiment, the angle correction member 3 and the stent 4 are formed of separate members. However, the angle correction member 3 and the stent 4 may be formed integrally. According to such a structure, since the number of the structural members of the dental implant extraction instrument 10 can be reduced, cost can be reduced. When the angle correction member 3 and the stent 4 are formed integrally, the first pin 1 is angle-corrected so that the rotation axis S1 of the first pin 1 is located on the same straight line as the central axis O of the fixture 100. What is necessary is just to fix in the insertion hole 33 of the member 3. The fixing means 5 can be used to fix the first pin 1 in the insertion hole 33, but is not limited thereto. When the first pin 1 is fixed in the insertion hole 33 by the fixing means 5, when the first pin 1 is extracted from the insertion hole 33, a hole constituted by the fixing means 5 is formed in the insertion hole 33. And by inserting the 2nd pin 2 in this hole, the effect similar to the dental implant extraction instrument 10 which concerns on one Embodiment mentioned above can be acquired.

DESCRIPTION OF SYMBOLS 10 Dental implant extraction instrument 1 1st pin 1a Front-end | tip part 1b Rear-end part 11 Male thread part 12 1st main-body part S1 Rotating shaft D1 Outer diameter 2 2nd pin 2a Front-end | tip part 2b Rear-end part 21 Fitting part 22 2nd Main body S2 Rotating shaft D2 Outer diameter 3 Angle correction member 31 Upper surface 32 Lower surface 33 Insertion hole D3a Inner diameter D3b Outer diameter H Height 4 Stent 41 Upper surface 42 Lower surface 43 Mounting portion 431 Bottom D43 Inner diameter 44 Through hole D44 Inner diameter 45 Locking portion 451 First locking portion 452 Second locking portion 5 Fixing means 100 Fixture 100a Front end portion 100b Rear end portion O Central shaft 101 Recessed portion 102 Female screw portion O102 Central shaft 103 Fit portion O103 Central shaft 104 Screw portion 110 Tooth tub Bone 111 next tooth

Claims (12)

A first pin having a male screw portion that can be screwed into a female screw portion of a dental implant at a tip portion;
A second pin having a fitting portion that can be fitted to the fitted portion of the dental implant at the tip portion;
An angle correction member having an insertion hole through which each of the first pin and the second pin can be inserted;
A concave mounting portion located on the upper surface, the lower surface, and the upper surface and having an inner diameter larger than the outer diameter of the angle correction member, penetrating from the bottom of the mounting portion to the lower surface, and the angle correction member A stent having an inner diameter smaller than an outer diameter and having a through-hole through which each of the first pin and the second pin can be inserted, and a locking portion extending from the lower surface;
Fixing means for fixing the angle correction member to the mounting portion,
The central axis of each of the female screw part and the fitted part is located on the central axis of the dental implant,
When the first pin and the second pin are respectively inserted into the insertion holes of the angle correction member, the respective rotation axes of the first pin and the second pin are the same as the central axis of the dental implant. A dental implant removal device for fixing the angle correction member to the placement portion by the fixing means at an angle located on a straight line.   Adjusting the angle of the angle correction member by inserting the first pin screwing the male screw portion into the female screw portion of the dental implant into the insertion hole of the angle correction member; The dental implant extraction device according to claim 1.   When each of the first pin and the second pin is inserted through the insertion hole of the angle correction member, a distance between each of the first pin and the second pin and the insertion hole of the angle correction member. The dental implant extraction device according to claim 1 or 2, wherein is 0.05 mm or less.   The dental implant extraction device according to any one of claims 1 to 3, wherein the dental implant is at least one selected from a fixture, an abutment screw, a cover cap, and a healing cap.   The dental implant extraction device according to any one of claims 1 to 3, wherein the dental implant is a fixture.   The dental implant extraction device according to any one of claims 1 to 5, wherein the first pin has lower strength than the second pin.   The first pin further includes a columnar first main body portion positioned on the rear end side of the male screw portion, and the second pin is on the rear end side of the fitting portion. The dental implant extraction device according to any one of claims 1 to 6, further comprising a cylindrical second main body portion positioned.   The dental implant extraction device according to any one of claims 1 to 7, wherein an outer diameter of the first pin and an outer diameter of the second pin are the same.   The dental implant extraction device according to any one of claims 1 to 8, wherein a height of the angle correction member is 2 mm or more.   The locking portion has a first locking portion and a second locking portion that are positioned so as to face each other across the through hole, and the first locking portion and the second locking portion are The dental implant removal device according to any one of claims 1 to 9, wherein both extend downward from the vicinity of the edge portion of the lower surface.   The dental implant extraction device according to any one of claims 1 to 10, wherein the fixing means is a dental resin.   The dental implant extraction device according to any one of claims 1 to 11, further comprising a screwdriver that rotates each of the first pin and the second pin.

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