KR102027336B1 - apparatus for bone flattening drill - Google Patents

Abstract

In order to improve the precision and convenience of the drilling process for the alveolar bone, the present invention includes a shank portion formed with a mounting portion coupled to the dental handpiece at the upper end; A cylindrical guide body portion connected to the lower side of the shank portion to be integrally rotated and supported and rotated by a guide hole of a surgical guide fixed inside the oral cavity so that an implantation position of the fixture is guided; A wedge-shaped point bit portion protruding downward from the lower center portion of the guide body portion and having a cutting area having a first diameter smaller than the diameter of the fixture; It is formed along the lower end of the guide body portion and stepped from the point portion of the point bit portion, extending radially outward from the outside of the point bit portion to have a cutting area of a second predetermined diameter exceeding the first predetermined diameter A flat cutting unit having a flat cutting blade formed at the side end in the rotational direction; And a gum cutter portion formed along a lower edge of the guide body portion and protruding along a cutting trajectory corresponding to a predetermined third diameter of the predetermined second diameter or more.

Description

Bone Plate Drilling Apparatus {apparatus for bone flattening drill}

The present invention relates to a bone plate drilling device, and more particularly, to a bone plate drilling device with improved precision and convenience of the drilling process for the alveolar bone.

In general, an implant means a substitute that can replace human tissue when the original human tissue is lost, but in the dentist, an implanted artificial tooth is implanted. In order to replace the lost tooth root, a fixture made of titanium, which does not have a rejection reaction on the human body, is planted in the alveolar bone where the tooth falls out, and the artificial tooth is fixed to restore the function of the tooth.

In the case of a general prosthesis or denture, the surrounding teeth and bones are damaged over time, but the implant can prevent damage to the surrounding dental tissue and can be used stably because there is no secondary decay factor. In addition, since the implant has the same structure as the natural teeth, there is no pain and foreign body feeling of the gums, and there is an advantage that can be used semi-permanently if you manage well.

1 is a flowchart illustrating a conventional implant procedure.

As shown in Figure 1, the conventional implant procedure is the first procedure (s1, s2, s3, s4) to place the fixture in the alveolar bone (s1, s2, s3, s4), the time the bone is fused to the alveolar bone (3-6 months After waiting for), the process includes fixing the final prosthesis (s5, s6).

First, the first procedure is a gum removal step (s1) of opening the gum of a portion where a tooth is missing (s1), a multi-stage drilling step (s2) for forming a perforation for fixing the fixture, and a fixture placement step (s3), the implanted fix Coupling the temporary teeth to the cheure (s4) is made.

In detail, in the gum removal step (s1), the gum is removed through a tissue punch or the like, and the alveolar bone at the position where the fixture is placed is exposed. Then, through the multi-stage drilling step (s2) in the exposed portion of the alveolar bone to form a perforation for fixing the fixture.

At this time, the multi-stage drilling step (s2) may be formed by forming an initial hole, expanding the hole, forming a screw thread in the hole, and removing the remaining alveolar bone in the hole. It can be variously made according to the type of drill used and the drilling method.

Then, the fixture is implanted in the perforation formed through the multi-stage drilling step (s2) (s3), and the first procedure is completed by combining the temporary teeth with the implanted fixture (s4).

Here, the fixture placed in the perforation is to play the role of the root of the artificial tooth. Therefore, the recovery process of the alveolar bone forming the fixture and bone fusion is fast and stable, and in order to provide a stable coupling force between the alveolar bone and the fixture after the bone fusion, it is very important to form an accurate perforation in the multistage drilling step (s2), The completeness of the artificial tooth formation through the implant procedure will be influenced.

On the other hand, the alveolar bone is coupled to the root of the tooth is supported, the gums surround the outer side of the alveolar bone. Here, the alveolar bone in the oral cavity is not a flat surface, but has an inhomogeneous shape with curved or irregularities.

However, the tissue punches used in the conventional gum removal step do not completely remove the gums of the curved or uneven portions of the alveolar bone when the gums at the position where the fixture is placed are formed to form the exposed portions of the alveolar bone. Because of this, additional equipment may be used to scrape the remaining gum or additional gum removal may be required. Accordingly, not only the procedure time is increased, but the burden on the patient is increased due to the increase in the procedure time.

In addition, the gum that was not completely removed was introduced into the perforation during the formation of the perforation to slow the recovery of the alveolar bone, and to reduce the mating force of the alveolar bone and the fixture to reduce the completeness and stability of the artificial tooth.

Moreover, when the multi-stage drilling step is performed while the surface of the exposed alveolar bone is not flat, there is a problem that an error occurs between the formed drilling and the position of the drilling designed by the initial simulation. Of course, a separate guide member such as a surgical guide with a guide ball for guiding drilling is provided, but when the alveolar bone is not flat, the drill end is not securely settled on the surface of the alveolar bone, thereby greatly reducing the precision of the work. There was a problem.

At this time, the position of the puncture during the simulation is determined in consideration of the shape of the remaining alveolar bone in the oral cavity and the distribution of bone mass around the puncture in consideration of the stable coupling and fast recovery of the fixture after implantation, bone fusion time.

Therefore, when the perforation is not formed at the precisely designed position, it may cause insufficient depth of implantation, lack of bone mass at the side of the fixture, and side effects such as alveolar bone damage due to orthodontic imbalance and lack of bone mass after combining artificial teeth. There was a problem causing it.

Moreover, when the fixation is not stable due to the error of puncture formation, implantation of alveolar bone or restoration of the alveolar bone is performed again to form a new puncture, which is inconvenient due to time and cost burden. There was also a problem of overburdening the medical staff who are weighted and implanted.

Korea Patent Registration No. 10-0829243

In order to solve the above problems, the present invention is to provide a bone plate drilling apparatus with improved precision and convenience of the drilling process for the alveolar bone.

In order to solve the above problems, the present invention is a shank portion formed with a mounting portion coupled to the dental handpiece in the upper end; A cylindrical guide body portion connected to the lower side of the shank portion to be integrally rotated and supported and rotated by a guide hole of a surgical guide fixed inside the oral cavity so that an implantation position of the fixture is guided; It is provided to have a cutting area of the first diameter which is protruded downward in the lower center of the lower end of the guide body portion and less than the diameter of the fixture, and is connected to the lower end from the connecting portion connected to the guide body to support the initial position during rotation. A wedge-shaped point bit portion having a narrow cross-sectional area; It is formed along the lower end of the guide body portion and stepped from the point portion of the point bit portion, extending radially outward from the outside of the point bit portion to have a cutting area of a second predetermined diameter exceeding the first predetermined diameter A flat cutting unit having a flat cutting blade formed at the side end in the rotational direction; And a protruding portion formed along a lower edge of the guide body and protruding along a cutting trajectory corresponding to a predetermined third diameter greater than or equal to the predetermined second diameter, and having a lower end formed at a horizontal position corresponding to the flat cutting edge. Provided is a bone drilling apparatus including a gum cutter.

Here, the groove cutter portion recessed toward the upper side of the guide body portion is formed between the gum cutter portion and the point bit portion, the outer peripheral surface of the guide body portion between the flat cutting portion and the gum cutter portion It is preferable that the discharge guide groove is formed to be inclined radially inward toward the lower side and communicate with the receiving groove.

At this time, the discharge guide groove is preferably formed to be inclined toward the rotation direction toward the lower side along the edge of the rotation opposite direction side is formed with a discharge guide surface connected to the flat cutting blade.

And, the gum cutter portion is connected to the outer edge surface of the receiving groove portion to cover the outer end of the receiving groove portion is formed with a round gum cutter blade along the lower end, the gum cutter blade is mutually with the outside of the point bit portion It is preferably formed in the corresponding horizontal position.

On the other hand, the inner end of the flat cutting portion is formed to be stepped in the direction of rotation from the flat cutting edge is preferably provided with an extended cutting edge connected to the outside of the point bit portion.

Through the above solution, the bone plate drilling apparatus according to the present invention provides the following effects.

First, since the wedge-shaped point bit portion protruding downward from the lower center portion of the guide body portion supports rotation of the flat cutting portion formed stepwise with the distal end portion, it is possible to stably flatten the work by preventing slippage due to body fluids or deviation from vibration.

Second, the cutting material generated by the point bit portion and the flat cutting portion is immediately discharged to the outside along the discharge guide groove formed on the outer circumferential surface of the guide body portion is discharged by the remaining cutting and gum cutting portion Since it is discharged after joining the receiving groove communicating with the guide groove, excessive cutting pressure caused by the cutting material is prevented, so that the cutting force is stably maintained, thereby improving cutting efficiency.

Third, the gum cutter part cuts and removes the gum clearly so that no gum remaining on the side wall of the expansion hole is generated by limiting the cutting area to the inside of the cutting trajectory of the predetermined third diameter. Each drill device can be inserted smoothly to improve the operator's work convenience.

Fourth, the extended cutting blade is formed to be stepped in the direction of rotation from the flat cutting blade so that the flat cutting blade whose diameter is suddenly expanded than the point bit portion enters the gum or alveolar bone to alleviate the vibration or impact generated To advance into the alveolar bone can be improved durability of the product.

1 is a flow chart showing a conventional implant procedure.
Figure 2 is a perspective view of the bone drilling apparatus according to an embodiment of the present invention.
3 is a front view of the bone drilling apparatus according to an embodiment of the present invention.
Figure 4 is a side view of the bone drilling apparatus according to an embodiment of the present invention.
Figure 5 is a bottom view of the bone drilling apparatus according to an embodiment of the present invention.
6a and 6b is a state diagram used in the bone drilling apparatus according to an embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings will be described in detail the plate drilling apparatus according to a preferred embodiment of the present invention.

Figure 2 is a perspective view of the bone drilling device according to an embodiment of the present invention, Figure 3 is a front view of the bone drilling device according to an embodiment of the present invention, Figure 4 is an embodiment of the present invention 5 is a bottom view of the bone drilling apparatus according to an embodiment of the present invention, Figure 6a and Figure 6b is a bone plating drilling apparatus according to an embodiment of the present invention Is also used.

As shown in Figure 2 to 6b, the bone plate drilling apparatus 100 according to an embodiment of the present invention is the shank portion 10, the guide body portion 20, the point bit portion 30, flat cutting portion 40 and gum cutter portion 50 is provided. In detail, the bone plate drilling apparatus 100 is used in the preceding procedure of multi-stage drilling to form a perforation for the placement of the fixture during the implant procedure. In addition, the bone drilling device 100 is used to remove the gum at the position where the implant is placed in the oral cavity and flatten the alveolar bone of the portion where the gum is removed.

Here, the shank portion 10, the guide body portion 20, the point bit portion 30, the flat cutting portion 40 and the gum cutter portion 50 is integrally formed by cutting or discharging the metal member. It can be formed as. Of course, in some cases, the point bit portion 30, the flat cutting portion 40 and the gum cutter portion 50 may be provided separately for convenience of replacement and detachably coupled to the guide body portion 20. have.

Meanwhile, referring to FIG. 2, the shank portion 10 has a mounting portion 11 coupled to a dental handpiece at an upper end thereof. Here, the dental handpiece is a hand drill device used to provide a rotational force to the bone plate drilling drill device 100, the coupling portion may be formed to be coupled to the mounting portion 11 on one side.

At this time, the mounting portion 11 is provided in a D-cut shape so as to rotate integrally with the coupling portion may be a rotational force transmitted from the coupling portion. In addition, a locking groove 12 is formed at the lower side of the mounting portion 11 so that the shank portion 10 may be firmly locked without being separated from the coupling portion.

In addition, the shank portion 10 may connect the dental handpiece and the guide body 20, and may transmit the rotational force transmitted to the mounting portion 11 to the guide body 20. And, the shank portion 10 may be formed irrespective of the diameter of the guide body portion 20 or the drill portion 50, but preferably provided with a diameter smaller than the diameter of the guide body portion 20. Do.

At this time, the shank portion 10 may be provided in a cylindrical shape. Through this, the shank portion 10 firmly supports the guide body portion 20, the point bit portion 30, the flat cutting portion 40 and the gum cutter portion 50 during high-speed rotation, The durability of the product can be improved by preventing rotational damage such as bending and twisting. Moreover, the shank portion 10 can prevent the precision of drilling from being reduced due to vibration due to rotational damage.

On the other hand, referring to Figures 2 to 6b, the guide body portion 20 is connected to the lower side of the shank portion 10 is rotated integrally. Here, the guide body portion 20 is provided in a cylindrical shape having an outer diameter corresponding to the inner circumference of the guide hole (9a) formed in the surgical guide (9).

In detail, during the implantation process, when forming the perforations in which the fixtures are placed, it is difficult to know the exact position and direction to be performed, and therefore, an auxiliary apparatus called the surgical guide 9 is used.

Here, the surgical guide 9 is formed of a profile inside the oral cavity. At this time, the surgical guide 9 is wrapped around the periodontal tissue (teeth and gums), such as teeth and gums of the teeth or teething teeth, and the guide hole (9a) is formed at each position where the implant is required. In addition, the guide hole 9a is preferably provided as a cylindrical hole to support various drill devices including the bone plate drilling drill device 100 inserted therein to be rotated and guided back and forth.

Here, the guide hole (9a) is coupled to the surgical guide (9) to reduce the frictional force during rotation of the inserted drill device and to prevent deformation during rotation to support the inserted drill device to rotate stably with a brass material It may be formed in the sleeve provided. Of course, in some cases, the guide hole 9a may be formed through the surgical guide 9.

As such, the guide body portion 20 is inserted into the guide hole 9a and slides back and forth, and is guided by being rotated inside the guide hole 9a. Thus, the accuracy of the gum removal procedure may be further improved. have.

In addition, the guide body 20 and the guide hole (9a) may be provided in various diameters according to the type of natural teeth to replace the implant. In detail, the fixture, which is the root of the artificial tooth, has various dimensions such as 3.5 mm, 4.0 mm, 4.5 mm, 5.0 mm, and the like. In addition, the diameter of the drill may also be selected to about 3.0 mm, 3.5 mm, 4.0 mm, 4.5 mm, or the like corresponding to the diameter of the fixture used. That is, the guide body 20 and the guide hole (9a) is preferably selected to be provided with a size corresponding to the diameter of the drill.

In addition, the guide body portion 20 is provided with a depth adjusting portion 21 marked in the circumferential direction along the outer circumferential surface to control the cutting degree of the alveolar bone 1 by displaying the depth inserted into the guide hole 9a. This is preferable. Here, the depth adjusting unit 21 may be provided in plurality in spaced apart at predetermined intervals along the rotation axis direction.

In detail, the operator checks the marking of the depth adjusting part 21 in the guide body 20 inserted into the guide hole 9a to check the point bit part 30, the flat cutting part 40, and the The insertion depth of the gum cutter part 50 can be confirmed. For this reason, the operator can perform the procedure to the correct depth according to the shape and bone distribution of the alveolar bone (1) of the patient confirmed by CT imaging. Accordingly, it is possible to minimize the loss of the alveolar bone (1) in the oral cavity of the patient and to remove the gum of the portion where the fixture is to be implanted, and to perform a flattening operation for drilling of the hole where the fixture is to be implanted.

On the other hand, the point bit portion 30 is connected to the lower portion of the guide body portion 20. Here, the lower direction is preferably understood as the direction toward the guide body portion 20 side from the shank portion 10, the upper direction is understood as the direction toward the shank portion 10 side from the guide body portion 20. This is preferable.

At this time, the point bit portion 30 is provided in a wedge shape, it is preferable that a plurality of initial cutting blades 32 are disposed radially with respect to the rotation center tip portion 31.

In detail, the point bit portion 30 protrudes downward from the lower center portion of the guide body portion 20. At this time, the point bit portion 30 may be provided in a polygonal horn shape that the cross-sectional area is narrowed toward the lower side from the connecting portion connected to the guide body portion 20. Accordingly, the rotation center tip 31 may be formed at the tip of the point bit part 30. Here, the tip of the point bit portion 30 is preferably understood as a concept corresponding to a lower end of the point bit portion 30 having a narrow cross-sectional area and a sharp end portion.

In addition, a plurality of cutting surfaces 30a may be formed along the circumferential direction based on the rotation center tip portion 31, and the initial cutting edge 32 may be formed at an edge at which each cutting surface 30a is connected. Can be.

Here, the bone plate drilling apparatus 100 points the rotation center tip 31 on the gum 2 to the alveolar bone 1 so that an error is prevented at the punching position when the initial position for drilling is set. Drilling can be carried out in contact. Through this, the point bit portion 30 can be stably entered into the alveolar bone 1 according to the rotational force of the dental handpiece. In particular, the bone plate drilling apparatus 100 is rotated in a state in which the point bit portion 30 is supported inside the gum 2 to the alveolar bone 1, so that the flattening of the bone drilling drill 100 is prevented from slipping by body fluids. Work is possible.

Furthermore, since the center position of the drilling is formed by the point bit unit 30 when the multi-stage drilling is performed after the planarization operation, another drill apparatus is connected to the point bit unit 30 without any separate center measurement. Insertion into the initial hole formed by the drilling can be performed so that the convenience of the work can be improved.

On the other hand, the point bit portion 30 is preferably provided to have a cutting area of the first diameter (D1) preset to less than the diameter of the fixture. Here, the cutting area of the point bit portion 30 is the outer region having the maximum cross-sectional area of the point bit portion 30 is rotated in the direction of the rotation axis with respect to the rotation center front end portion 31 is formed in the rotation trajectory It is preferable to understand that the gum 2 to the alveolar bone 1 are cut. In addition, the predetermined first diameter (D1) is preferably understood as the diameter of the circular trajectory that is formed while the point bit portion 30 rotates.

That is, the point bit part 30 forms the initial hole smaller than the diameter of the fixture, but is prevented from being separated from the center of rotation of the bone drilling apparatus 100 due to vibration generated during the planarization operation. Play a supportive role.

Through this, the point bit portion 30 is the gum center (2) by the initial cutting blade 32 in the state in which the rotation center tip portion 31 is in point contact with the gum (2) to the alveolar bone (1) The alveolar bone 1 may be cut to enter the interior. In addition, the flat cutting unit 40 may be in contact with the gum 2 to the alveolar bone 1 in a state in which the rotation center is supported by the point bit unit 30 to stably flatten the operation.

On the other hand, the flat cutting portion 40 is formed to be stepped with the tip portion of the point bit portion 30 along the lower end of the guide body portion 20. In detail, the flat cutting portion 40 is connected to an outer periphery of the point bit portion 30 having the predetermined first diameter D1 and is preset to exceed the predetermined first diameter D1. It may extend radially outward to have a cutting area of the second diameter D2.

Here, the preset second diameter D2 may be set to be equal to or less than the diameter of the guide body 20 exceeding the preset first diameter D1 and corresponding to the diameter of the drill. It may be set to correspond to the diameter of the guide body 20. Through this, the initial hole formed by the point bit portion 30 may be extended to correspond to the diameter of the drill used by the flat cutting portion 40.

In addition, the plurality of flat cutting parts 40 may be provided radially and spaced apart at predetermined intervals along the circumferential direction with respect to the rotation center tip part 31. In addition, the flat cutting portion 40 is preferably a flat cutting blade 41 is formed on the side end portion in the rotational direction extending radially outward from the outside of the point bit portion 30.

Here, the rotational side end portion of the flat cutting portion 40 is an end toward the rotational direction side, it is preferable to understand as an end on the counterclockwise side.

In this embodiment, the rotation direction (counterclockwise arrow in FIG. 5) of the bone plate drilling apparatus 100 is illustrated and described as an example in the counterclockwise direction, but in some cases, the rotation direction is set clockwise. In this case, the design can be easily changed by reversing the shape of each component.

In addition, the flat cutting blade 41 may be formed horizontally along the side end portion of the flat cutting portion 40 in the rotational direction, and has the predetermined first diameter D1 of the point bit portion 30. It may be disposed at a position corresponding to the outside. That is, the point bit part 30 may protrude downward from the flat cutting part 40.

In this case, the flat cutting blade 41 may form a cutting force from the inner end portion 41a connected to the point bit portion 30 to the outer end side. Here, the flat cutting blade 41 may flatten the non-uniform alveolar bone 1 while the center of rotation is supported by the point bit part 30 to remove the gum.

Accordingly, as the alveolar bone 1 of the fixture placement portion is flattened by the flat cutting blade 41, the end of the drill may be stably seated on the alveolar bone 1 when forming a punch in a subsequent multi-stage drilling step. Thereby, the precision of the perforation formation can be significantly improved. In addition, even a single procedure can be completely removed without the gum remaining in the non-uniform portion of the alveolar bone (1), so no additional gum removal operation is required, the gum removal procedure time can be shortened.

In this case, the flat cutting part 40 may be provided with a cutting guide surface 43 formed to be inclined upwardly from the flat cutting blade 41 toward the opposite side end portion in the opposite direction of rotation. Here, the cutting guide surface 43 is preferably understood to be a surface facing the gums 2 to the alveolar bone 1 of the flat cutting portion 40 during the flattening operation.

In detail, the flat cutting part 40 cuts the gum 2 to the alveolar bone 1 according to the rotational force of the dental handpiece. Here, the cutting guide surface 43 is formed to be inclined upward toward the opposite direction of rotation so that the contact area is minimized during the flattening operation so that the flat cutting blade 41 may contact the gums 2 to the alveolar bone 1. . In this case, the cutting guide surface 43 may be set to have an inclination angle of 3 to 6 ° from the flat cutting edge 41 toward the opposite side end portion in the opposite direction of rotation.

Through this, the flat cutting part 40 may reduce the contact area during drilling, thereby minimizing frictional heat due to friction during the flattening operation, and may prevent bone cell necrosis of alveolar bone from laceration of the gum tissue due to frictional heat. . In addition, the gums 2 to the alveolar bone 1 are not discharged through the discharge guide groove 22 described later among the cuts generated by the initial cutting blade 32 and the flat cutting blade 41. Some cutting material may be accommodated in the receiving groove portion 52 to be described later via the cutting guide surface 43.

On the other hand, it is preferable that the expansion cutting edge 43a is provided at the inner end of the flat cutting portion 40. In detail, the extended cutting edge 43a may be stepped from the flat cutting edge 41 in the rotational direction, and may be connected to the outer edge of the point bit part 30 to have a continuous profile. In this case, the extended cutting edge 43a may be substantially disposed between the inner end of the flat cutting blade 41 and the outer edge of the point bit part 30.

In this case, the extended cutting edge 43a has a cutting area corresponding to the fourth preset diameter D4, and the cutting area of the extended cutting edge 43a is partially cut into the cutting area of the flat cutting edge 41. Can be nested.

In detail, as the inner end of the extended cutting edge 43a and the outer edge of the point bit portion 30 are interconnected, the cutting region of the point bit portion 30 and the cutting region of the extended cutting edge 43a are substantially Can be interconnected. In addition, the outer end side cutting region of the extended cutting edge 43a may overlap with the inner end 41a side cutting region of the flat cutting edge 41. That is, the extended cutting edge 43a has the cutting region and the flatness of the point bit portion 30 after the point bit portion 30 enters the gum 2 to the alveolar bone 1 during the flattening operation. It serves to continuously connect the cutting area of the cutting edge (41).

In addition, the extended cutting edge 43a is connected to the cutting guide surface 43 inclined upward toward the opposite side end portion of the rotary cutting edge 43a to contact the gum 2 to the alveolar bone 1 with the contact area minimized. And the planarization operation can be performed.

In this case, the extended cutting edge 43a may be disposed below the flat cutting edge 41 by the inclination angle of the cutting guide surface 43. Here, the expansion cutting edge 43a is the point bit portion 30 is supported on the gum 2 to the alveolar bone 1 in a state in which the point bit portion 30 is supported inside the gum 2 to the alveolar bone 1 during the flattening operation. The cutting process may be performed before contacting the planar cutting blade 41 to extend the sidewall portion of the initial hole formed by the point bit portion 30 to form an expansion hole. Through this, the initial cutting edge 32, the extended cutting edge (43a) and the flat cutting edge 41 may enter in stages.

Accordingly, even when the flat cutting blade 41 has a diameter larger than the point bit portion 30 during the flattening operation, the extended cutting blade 43a is advanced into the gum 2 to the alveolar bone 1. Stable entry along the path can further improve cutting efficiency. In addition, the extended cutting blade 43a is a vibration or shock generated when the flat cutting blade 41 whose diameter is suddenly expanded than the point bit portion 30 enters the gums 2 to the alveolar bone 1. Advancement to mitigate can improve product durability.

On the other hand, the gum cutter portion 50 is formed along the lower edge of the guide body portion 20. Here, the gum cutter unit 50 protrudes to cut the gum 2 along a cutting trajectory corresponding to the preset third diameter greater than or equal to the preset second diameter D2. Here, the gum cutter portion 50 may have a cutting trajectory greater than or equal to the predetermined second diameter D2 but may be formed to be less than or equal to the diameter of the guide body portion 20. In the present exemplary embodiment, a shape in which the preset third diameter substantially corresponds to the preset second diameter D2 is illustrated and described.

In detail, the gum cutter portion 50 may be formed in a continuous outer surface profile from the outer circumferential surface of the guide body portion 20, and the outer end thereof may be arcuate in correspondence to the rotation direction to have a cutting trajectory of the third diameter. It can be formed into a profile. In addition, the gum cutter part 50 may have a lower end rounded toward the lower side, and a round gum cutter blade 51 may be formed along the lower end of the gum cutter part 50.

As a result, the gum cutter 51 is formed to be rounded in contact with the gum 2 so that the cutting process may be performed by smoothly entering the inside of the gum 2 during the flattening operation. In addition, the gum cutter portion 50 may be formed to have a flat sidewall portion of the expansion hole after the flattening operation as the outer end is formed in an arc-shaped profile.

That is, the flat cutting part 40 cuts the gum 2 to the alveolar bone 1 so that the expansion hole is formed, and the gum cutter part 50 is formed so that the side wall of the expansion hole is clearly and flatly formed. It serves to cut the gum 2 corresponding to the set third diameter.

Accordingly, the gum cutter unit 50 cuts and removes the gum 2 clearly so that the gum area remaining in the side wall of the expansion hole does not occur by limiting the cutting area to the inside of the preset cutting trajectory of the third diameter. Therefore, when performing the subsequent multi-stage drilling, each drill device may be smoothly inserted to improve the operator's convenience.

Here, the gum cutter 51 is preferably formed in a horizontal position corresponding to the outside of the point bit portion 30. In this case, the lowermost end of the gum cutter 51 may be disposed to correspond to a horizontal position of the outside of the point bit part 30. Therefore, the flat cutting blade 41 and the gum cutter blade 51 extending from the outside of the point bit portion 30 may be disposed in a horizontal position corresponding to each other.

Through this, the flat cutting blade 41 and the gum cutter blade 51 may be in contact with the gum 2 to the alveolar bone at the same time, in addition to the flattening operation of the flat cutting blade 41 and the predetermined The gum 2 may be cut along a rotational trajectory corresponding to the third diameter.

In addition, the gum cutter portion 50 may be provided in plural and is disposed alternately with the flat cutting portion 40 in the circumferential direction. In this case, the gum cutter portion 50 may be provided in a quantity corresponding to the quantity of the flat cutting portion 40 and may be alternately disposed with the flat cutting portion 40 along the circumferential direction. Through this, the flattening process of the flat cutting part 40 and the gum cutting process of the gum cutter part 50 may be repeatedly performed in response to the rotational force of the dental handpiece.

In addition, a cutting guide surface 51a may be formed at the lower end of the gum cutter part 50. Here, the cutting guide surface 51a may be connected to the gum cutter 51 and may be inclined toward the radially inner side toward the upper side.

At this time, the gum cutter 51 may be provided in a blade shape having a narrow width as the circumferential width decreases toward the lower side. That is, the gum cutter blade 51 may be formed by a cutting blade having an appropriate thickness for stably entering the inside of the gum 2 in the cutting process by the cutting guide surface 51a. In addition, the gum 2 cut by the gum cutter 51 may be accommodated inside the receiving groove 52 stably described later along the cutting guide surface 51a.

On the other hand, the discharge guide groove portion 22 is preferably formed on the outer circumferential surface of the guide body portion 20. In addition, it is preferable that the discharge guide groove portion 22 has a discharge guide surface 42 formed to be inclined toward the rotational direction toward the lower side along the edge of the rotational opposite direction.

In detail, the discharge guide groove portion 22 is formed on the outer circumferential surface of the guide body portion 20 between the flat cutting portion 40 and the gum cutter portion 50. In addition, the discharge guide surface 42 is formed along the opposite rotational side edge surface formed by inclining the discharge guide groove portion 22 inclined radially inward toward the lower side. In addition, the discharge guide surface 42 is formed to be inclined toward the rotation direction toward the lower side so that the lower end may be connected to the flat cutting blade 41.

Thus, the discharge guide groove 22 may be formed on the side of the flat cutting portion 40 in the rotational direction, and may be inclined downward in the rotational direction so as to correspond to the inclination angle of the discharge guide surface 42.

In addition, the discharge guide groove 22 may be inclined radially inward toward the rotation direction toward the lower side. In addition, the lower edge portion of the discharge guide groove portion 22 may be connected to the stepped portion of the extended cutting blade 43a and the flat cutting blade 41.

Therefore, the cuttings of the gums 2 to the alveolar bone 1 cut by the initial cutting blade 32, the expansion cutting blade 43a and the flat cutting blade 41 are formed in the discharge guide groove 22. It can be introduced inside. In addition, the cutting material introduced into the discharge guide groove part 22 may allow the discharge guide surface 42 and the discharge guide groove part 22 to be inclined upward in the opposite direction of rotation in response to the rotational force of the dental handpiece. Accordingly, the initial hole is extended and discharged to the outside from the expansion hole in which the planarization work is performed.

At this time, the discharge stepped portion 22a may protrude from the upper edge portion of the discharge guide groove portion 22 radially outwardly. Through this, the cutting material discharged along the discharge guide groove portion 22 may be caught by the discharge step portion 22a and may flow outward in a radial direction to be spaced apart from the bone plating drill apparatus 100.

In addition, the vertical gap between the gum cutter 51 and the discharge step part 22a may be set to correspond to the vertical gap between the flat cutting blade 41 and the discharge step part 22a. Therefore, the gum cutter 51 may be disposed such that the lowermost end thereof corresponds to the height of the flat cutting blade 41.

Accordingly, the cutting guide groove portion 22 of the gum 2 to the alveolar bone 1 cut by the initial cutting blade 32, the expansion cutting blade 43a, and the flat cutting blade 41 is immediately generated. Since the gums 2 to alveolar bones 1 are entangled on the cutting edges 32, 43a and 41 during the planarization operation, the cutting force may be prevented from being reduced by being immediately discharged to the outside after being introduced into the inside of the blade. .

Here, the discharge guide groove portion 22 may be formed on the outer circumferential surface of the guide body portion 20 to correspond to a predetermined length.

Of course, in some cases, when the bone plate drilling apparatus 100 is inserted into the guide hole 9a of the surgical guide 9 and the flattening operation is performed, the discharge guide groove portion 22 is the guide body portion. It may be formed to have a vertical height corresponding to the interval between the depth adjusting portion 21 from the lower end of the (20). In this case, the cutting material may be discharged from the expansion hole to the outside through the guide hole 9a along the discharge guide groove 22.

Through this, the cutting material generated by the cutting of the gums 2 to the alveolar bone 1 cut by the initial cutting blade 32, the expansion cutting blade 43a and the flat cutting blade 41 is As soon as it is cut in response to the rotational force of the dental handpiece, it may flow upward along the discharge guide surface 42 inclined upwardly in the opposite direction of rotation. That is, the discharge guide surface 42 serves to guide the cutting material flowing into the discharge guide groove 22 to be smoothly discharged upward by the rotational force.

On the other hand, between the gum cutter portion 50 and the point bit portion 30 is preferably formed in the receiving groove 52 recessed from the lower side of the guide body portion 20 toward the upper side. In detail, the accommodating groove 52 may be formed to penetrate laterally under the guide body 20, and an open one side may communicate with the discharge guide groove 22.

In addition, the outer edge surface 52a of the accommodation groove 52 may be connected to the cutting guide surface 51a, and the inner edge surface 52b of the accommodation groove 52 may be formed at the point bit portion 30. It may be formed with an outer surface profile continuous to the cutting surface 30a.

Here, the inner rim surface 52b of the receiving groove portion 52 may be formed to be inclined radially outward toward the upper side corresponding to the inclination angle of the cutting surface 30a. In addition, the outer edge surface 52a of the receiving groove portion 52 may be formed to be inclined toward the radially inner side toward the upper side, but may have an inclination angle symmetrical to the inner edge surface 52b of the receiving groove portion 52. .

Therefore, the gum cutter part 50 may cover the outer end of the accommodation groove 52 but may be connected to the outer edge surface 52a of the accommodation groove 52. Through this, the gum cutter part 50 covers the outer side of the receiving groove 52 so that the gum 2 cut by the gum cutter 51 passes through the cutting guide surface 51a and the receiving groove part. 52 can be accommodated stably inside.

At this time, the receiving groove portion 52 is cut by the point bit portion 30, the flat cutting portion 40 or the gum 2 to the alveolar bone 1 cut by the gum cutter portion 50 Water may be introduced and received. That is, the receiving groove 52 is a cutting material generated by cutting the gum 2 by the gum cutter portion 50, and the gum 2 to the alveolar bone 1 is the point bit portion 30 and Some of the cuttings generated by the flat cutting unit 40 may not flow through the discharge guide groove part 22.

Through this, the generated cuttings of the gum 2 to the alveolar bone 1 may be accommodated by being joined to the inside of the receiving groove 52 so as not to interfere with the planarization work. In addition, even if the cut gums 2 to alveolar bone 1 fill the inside of the receiving groove 52, the receiving groove 52 communicated with the discharge guide groove 22 according to the rotational force of the dental handpiece. The gum 2 to alveolar bone 1 cut through the one side of the receiving groove 52 may be discharged to the outside from the expansion hole.

That is, the cuttings generated by the cutting edges 32, 43a and 41 are smoothly discharged to the outside from the expansion hole along the discharge guide groove 22. In addition, the discharge guide groove 22 after the cutting material generated by the cutting edges (32, 43a, 41) remaining or generated by the gum cutter 51 is joined to the receiving groove (52) to be accommodated. And smoothly discharged to the outside from the expansion hole along the discharge guide surface 42.

As such, since the sequential discharging process of the cutting material through the discharge guide groove part 22 is continuously performed, the discharge efficiency of the cutting material may be improved, and excessive accommodation of the cutting material may be prevented in the receiving groove part 52. Can be. That is, since the space in which the bone drilling device 100 rotates is formed inside the expansion hole, excessive cutting pressure caused by the cutting material may be prevented. Accordingly, the cutting edges 32, 43a, 41 and the gum cutter blade 51 smoothly contact the inner surface of the expansion hole, thereby preventing the deterioration of drill performance due to the reduction of the rotational force and maintaining the cutting force stably. Cutting efficiency can be further improved.

As described above, the present invention is not limited to the above-described embodiments, but may be modified and implemented by those skilled in the art without departing from the scope of the claims of the present invention. Such variations are within the scope of the present invention.

10: shank portion 20: guide body portion
22: discharge guide groove portion 30: point bit portion
40: flat cutting part 41: flat cutting blade
42: discharge guide surface 43a: extended cutting blade
50: gum cutter part 51: gum cutter blade
52: accommodating groove 100: bone plate drilling drill device

Claims (5)

A shank portion having a mounting portion coupled to a dental handpiece at an upper end thereof;
A cylindrical guide body portion connected to the lower side of the shank portion to be integrally rotated and supported and rotated by a guide hole of a surgical guide fixed inside the oral cavity so that an implantation position of the fixture is guided;
It is provided to have a cutting area of the first diameter which is protruded downward in the lower center of the lower end of the guide body portion and less than the diameter of the fixture, and is connected to the lower end from the connecting portion connected to the guide body to support the initial position during rotation. A wedge-shaped point bit portion having a narrow cross-sectional area;
It is formed along the lower end of the guide body portion and stepped from the point portion of the point bit portion, extending radially outward from the outside of the point bit portion to have a cutting area of a second predetermined diameter exceeding the first predetermined diameter A flat cutting unit having a flat cutting blade formed at the side end in the rotational direction; And
It is formed along the lower edge of the guide body portion and protrudes to cut along a cutting trajectory corresponding to the predetermined third diameter of the predetermined second diameter or more, and the lower end is formed in a horizontal position corresponding to the flat cutting edge Bone plated drill device comprising a cutter portion. The method of claim 1,
Between the gum cutter portion and the point bit portion is provided with a receiving recess recessed toward the upper side of the guide body portion to accommodate the cutting object,
And a discharge guide groove formed in the outer peripheral surface of the guide body portion between the flat cutting portion and the gum cutter portion to be inclined radially inward toward the lower side to communicate with the receiving groove. The method of claim 2,
The discharge guide groove portion is plated drill device, characterized in that the discharge guide surface is formed inclined toward the rotation direction toward the lower side along the edge of the opposite side of the rotation direction is connected to the flat cutting blade. The method of claim 2,
The gum cutter portion is connected to the outer edge surface of the receiving groove portion to cover the outer end of the receiving groove portion is formed with a round gum cutter blade along the lower end,
The gum cutter blade is bone plated drilling apparatus, characterized in that formed in a horizontal position corresponding to the outside of the point bit portion. The method of claim 1,
And an extended cutting edge formed at an inner end of the flat cutting portion toward the rotation direction from the flat cutting edge to be connected to an outer edge of the point bit portion.

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