Dental drill apparatus

Abstract

One embodiment of the present invention relates to a dental drill apparatus inserted along a guide hole of a guide device installed in a patient's oral cavity. The dental drill apparatus comprises: a shank part coupled to a dental handpiece; a drill body part connected to a lower portion of the shank part and rotated by the rotational force of the dental handpiece and supported on the inner periphery of the guide hole; a drill blade part formed on a lower portion of the drill body part; and a stopper part formed between the drill body part and the shank part and having a diameter larger than the inner periphery of the guide hole, wherein the drill body part is movable along the inner periphery of the guide hole in an inclined state with respect to the central axis of the guide hole.

Description

Dental drill device

[0001] The present invention relates to a dental drill device.

[0002] Implants can replace the function of natural teeth in patients with a single missing tooth, as well as those with partial or complete edentulism, improve the aesthetic aspects of dental prosthetic restorations, and furthermore, prevent implant failure by dispersing excessive stress applied to the surrounding alveolar bone tissue.

[0003] Once the implant placement site is determined, the gum tissue corresponding to the site is removed from inside the patient's oral cavity, and a perforation is formed in the exposed alveolar bone for the insertion of the implant.

[0004] At this time, when an implant serving as the root of an artificial tooth is placed in the above-mentioned perforation, a temporary tooth, such as a healing abutment, is attached to the implant to prevent gums or other foreign substances from entering the implant during osseofusion between the implant and the alveolar bone.

[0005] Then, after a osseointegration period of about 3 to 6 months has elapsed following the attachment of the healing abutment, the healing abutment is removed and the abutment is attached. At this time, the insertion direction of the implant may change slightly during the process of osseointegration with the alveolar bone, and the insertion path of the abutment may be blocked by the regenerated alveolar bone and gums during the osseointegration period.

[0006] Accordingly, after the removal of the healing abutment, a process is required to remove the gum or alveolar bone located in the connection path between the abutment and the implant using this profile drill.

[0007] This drilling procedure is performed using a surgical guide tool called a guide device. While fixed within the oral cavity, the guide device has guide holes formed to guide the implantation position corresponding to the implant surgery plan. The guide holes are formed coaxially with the implant.

[0008] Meanwhile, as shown in FIG. 1, if the condition of the alveolar bone and gums is not good depending on the patient's condition, the implant (1) is implanted at an angle, and in this case, an angled abutment (2) that is bent at a certain angle must be attached to the implant (1). In order to insert the bent abutment, the alveolar bone (3) and gums (4) that interfere with the protrusion (2a) of the abutment must be removed. However, the interference area is located away from the guide hole (5), so there was a problem that it was difficult to remove the interference area while using a guide device.

[0009] Furthermore, when the guide is detached, there is a problem in that it is difficult to accurately remove the gums or alveolar bone based on the planned direction, location, and depth of the perforation formation.

[0010] The present invention aims to solve the problems of the aforementioned prior art, and the objective of the present invention is to provide a dental drill device that is supported in a guide hole and can remove a portion of the outer region of the guide hole.

[0011] One aspect of the present invention provides a dental drill device inserted along a guide hole of a guide device installed in the oral cavity of a patient, comprising: a shank portion coupled to a dental handpiece; a drill body portion connected to the lower part of the shank portion, rotated by the rotational force of the dental handpiece, and supported on the inner circumference of the guide hole; a drill blade portion formed on the lower part of the drill body portion; and a stopper portion formed between the drill body portion and the shank portion, having a diameter wider than the inner circumference of the guide hole, wherein the drill body portion is movable in an inclined state with respect to the central axis of the guide hole on the inner circumference of the guide hole.

[0012] In one embodiment, the outer surface of the drill body may have a tapered shape in which the diameter decreases as it goes downward.

[0013] In one embodiment, the lower surface of the stopper part may be a tapered shape that is supported on the upper part of the guide hole and has a diameter that decreases as it goes downward.

[0014] In one embodiment, the outer surface of the drill body and the lower surface of the stopper may be inclined by α.

[0015] In one embodiment, the drill body may move at a maximum of α or less with respect to the center axis of the guide hole, and the drill blade may rotate circumferentially with respect to the center axis of the guide hole while in a state inclining by a maximum of α with respect to the center axis of the guide hole.

[0016] In one embodiment, the drill bit moves at a maximum of α or less with respect to the central axis of the guide hole and can cut the outer region of the guide hole.

[0017] In one embodiment, the drill body portion may include a round surface disposed between the stopper portion and the outer surface, with the diameter gradually decreasing towards the top.

[0018] In one embodiment, the drill bit may include a plurality of lower cutting blades provided at the bottom and a plurality of flat cutting blades provided on the side.

[0019] In one embodiment, the lower cutting edge may be formed to be pointed as the cross-sectional area decreases toward the tip.

[0020] In one embodiment, the lower cutting blade and the flat cutting blade may be arranged in a radially spreading form.

[0021] In one embodiment, the drill body may be spherical in shape.

[0022] In one embodiment, the drill body may include a tapered outer surface with a diameter that decreases toward the lower side, and a rounded surface disposed between the stopper and the outer surface, with a diameter that gradually decreases toward the upper side.

[0023] In one embodiment, the lower surface of the stopper part is supported on the upper part of the guide hole, the lower surface of the stopper part has a tapered shape in which the diameter decreases as it goes downward, and the outer surface of the drill body part and the lower surface of the stopper part may be inclined by α.

[0024] In one embodiment, the lower surface of the stopper part is supported on the upper part of the guide hole, and the lower surface of the stopper part may be parallel to the radial direction of the central axis.

[0025] In one embodiment, the lower surface of the stopper part is supported on the upper part of the guide hole, and the lower surface of the stopper part includes a first lower surface parallel to the radial direction of the central axis and a second lower surface having a tapered shape that extends radially outward from the first lower surface and increases in diameter toward the upper side, and the second lower surface may be supported on the upper part of the guide hole.

[0026] According to one aspect of the present invention, when a dental drill device moves in a circumferential direction with respect to the central axis of a guide hole, the outer region of the guide hole can also be partially removed by the circumferential movement of the drill bit.

[0027] In addition, since the dental drill device is stably supported at two points located opposite each other with respect to the central axis of the guide hole, user convenience is improved while accuracy during the alveolar bone removal procedure can be enhanced.

[0028] In addition, the lower edge of the flat cutting blade is formed to be inclined downward, which facilitates the insertion of the drill bit and prevents breakage that may occur due to stress concentration at the corners, and ensures a uniform cutting surface when the drill moves in an inclined state.

[0029] The effects of the present invention are not limited to the effects described above, and should be understood to include all effects that can be inferred from the configuration of the invention described in the detailed description or claims of the present invention.

[0030] FIG. 1 is a drawing showing an implant implanted in a tilted state in the prior art and an angled abutment attached thereto.

[0031] FIG. 2 is a drawing showing a dental drill device according to the first embodiment of the present invention mounted on a guide device.

[0032] FIG. 3 is a perspective view of a dental drill device according to a first embodiment of the present invention.

[0033] FIG. 4 is an enlarged view of a drill bit portion according to the first embodiment of the present invention.

[0034] FIG. 5 is a partial enlarged cross-sectional view of the drill body and stopper portion according to the first embodiment of the present invention.

[0035] FIG. 6 is a drawing showing an example of use of a dental drill device according to the first embodiment of the present invention.

[0036] FIG. 7 is a cross-sectional view of a dental drill device tilted to one side as much as possible, as in A of FIG. 6.

[0037] Figure 8 is a cross-sectional view of a dental drill device tilted as far as possible to the other side, as in Figure 6B.

[0038] FIG. 9 is a drawing showing the procedure of an implant and an angled abutment in a tilted state using a dental drill device according to the first embodiment of the present invention.

[0039] FIG. 10 illustrates a dental drill device according to a second embodiment of the present invention mounted on a sleeve.

[0040] FIG. 11 is a perspective view of a dental drill device according to a second embodiment of the present invention.

[0041] FIG. 12 is a partial enlarged cross-sectional view of the drill body and stopper portion according to a second embodiment of the present invention.

[0042] FIG. 13 is a cross-sectional view of a dental drill device according to a second embodiment of the present invention in a state where it is tilted to one side as much as possible.

[0043] FIG. 14 is a cross-sectional view of a dental drill device according to a second embodiment of the present invention in a state where it is tilted to the maximum extent to the other side.

[0044] FIGS. 15 and 16 are cross-sectional views illustrating other examples of the lower surface of a stopper portion according to a second embodiment of the present invention.

[0045] FIG. 17 is a perspective view of a dental drill device according to a third embodiment of the present invention.

[0046] FIG. 18 is a partial enlarged cross-sectional view of the drill body and stopper portion according to the third embodiment of the present invention.

[0047] FIG. 19 is a cross-sectional view of a dental drill device according to the third embodiment of the present invention in a state where it is tilted to one side as much as possible.

[0048] FIG. 20 is a cross-sectional view of a dental drill device according to the third embodiment of the present invention in a state where it is tilted to the maximum extent to the other side.

[0049] FIGS. 21 and 22 are cross-sectional views illustrating other examples of the lower surface of a stopper portion according to a third embodiment of the present invention.

[0050] FIG. 23 is a partial cross-sectional view of a dental drill device according to the fourth embodiment of the present invention.

[0051] The present invention will be described below with reference to the attached drawings. However, the present invention may be implemented in various different forms and is therefore not limited to the embodiments described herein. Furthermore, in order to clearly explain the present invention in the drawings, parts unrelated to the explanation have been omitted, and similar parts throughout the specification have been given similar reference numerals.

[0052] Throughout the specification, when it is stated that a part is "connected" to another part, this includes not only cases where they are "directly connected," but also cases where they are "indirectly connected" with other members interposed between them. Furthermore, when it is stated that a part "includes" a certain component, this means that, unless specifically stated otherwise, it does not exclude other components but rather allows for the inclusion of additional components.

[0053] Terms including ordinal numbers such as ‘first’ or ‘second’ used herein may be used to describe various components or steps, but such components or steps should not be limited by ordinal numbers. Terms including ordinal numbers should be interpreted solely for the purpose of distinguishing one component or step from other components or steps.

[0054] Hereinafter, embodiments of the present invention will be described in detail with reference to the attached drawings.

[0055] FIG. 2 illustrates a dental drill device according to a first embodiment of the present invention mounted on a guide device.

[0056] The guide device (10) is formed into a profile inside the oral cavity according to the implant procedure plan based on the patient's oral information, and is provided to be inserted into the oral cavity and secured by wrapping around the periodontal tissue.

[0057] The guide device (10) can stably guide all implant procedures, including drilling operations, while fixed in the oral cavity. Additionally, it is preferable that the guide device (10) has guide holes (11) formed along the location where the implants are to be placed, corresponding to the number of implants to be placed. As an example, the guide device (10) may be a surgical guide or a stent.

[0058] The guide hole (11) may be formed directly in the guide device (10), but it is also possible to form it in a sleeve (20) coupled to the guide device (10) to stably support rotation of the dental drill device (100) by reducing frictional force during rotation of the dental drill device (100) and preventing deformation during rotation.

[0059] With the sleeve (20) coupled to the guide device (10), the guide hole (11) directly formed in the guide device (10) and the guide hole (21) formed in the sleeve (20) can be in communication with each other.

[0060] A sleeve mounting hole may be further formed in the guide device (10) to which the sleeve (20) is coupled. The sleeve mounting hole may be formed with a diameter larger than that of the guide hole (11, 21) so that the sleeve (20) can be inserted into the sleeve mounting hole. Alternatively, when the sleeve (20) is inserted into the sleeve mounting hole, the upper outer edge (23) of the sleeve (20) may be formed to protrude in an outer radius direction so that the upper outer edge (23) of the sleeve (20) can be secured by being caught on the upper end of the sleeve mounting hole.

[0061] The upper inner edge (22) of the guide hole (11) can be rounded or chamfered to allow for smooth rotation of the dental drill device (100).

[0062] FIG. 3 is a perspective view of a dental drill device according to a first embodiment of the present invention.

[0063] Referring to FIG. 3, a dental drill device (100) according to the first embodiment of the present invention includes a shank part (110), a drill body part (120), a stopper part (130), and a drill blade part (140).

[0064] The shank portion (110) has a mounting portion (111) formed at the upper end that is coupled to a dental handpiece. The shank portion (110) can transmit rotational force transmitted from the dental handpiece to the drill body portion (120) and the drill bit portion (140). Here, it is preferable that the shank portion (110) be provided with a diameter smaller than the diameter of the stopper (130).

[0065] The drill body (120) is inserted into the inside of the guide hole, slides along the axial direction of the guide hole inside the guide hole, and supports rotation inside the guide hole, thereby improving accuracy during the alveolar bone removal procedure.

[0066] The drill body portion (120) extends radially outward from the center of rotation of the shank portion (110). The drill body portion (120) is formed in a tapered shape with a diameter that decreases toward the lower side and is formed symmetrically with respect to the central axis (C1). The widest part of the drill body portion (120) has an outer diameter corresponding to the inner circumference of the guide hole.

[0067] A stopper part (130) is provided on the upper part of the drill body part (120), and a drill blade part (140) is provided on the lower part of the drill body part (120). The stopper part (130) is located between the drill body part (120) and the shank part (110).

[0068] For example, the stopper portion (130) extends radially outward from the bottom of the shank portion (110). Here, the lower surface (131) of the stopper portion (130) is configured to be constrained and seated on the upper edge of the guide hole, and it is preferable to have a diameter wider than the inner circumference of the guide hole.

[0069] The lower surface (131) of the stopper part (130) is formed in a tapered shape with a diameter that decreases as it goes downward.

[0070] FIG. 4 is an enlarged view of a drill bit portion according to the first embodiment of the present invention.

[0071] The drill bit (140) according to the first embodiment of the present invention is composed of a lower cutting part (140a) provided at the bottom and a flat cutting part (141) provided on the side.

[0072] The lower cutting section (140a) may be provided in a polygonal horn shape in which the cross-sectional area narrows as it extends downward. That is, the lower cutting section (140a) may be formed as a pointed shape with a reduced cross-sectional area as it extends toward the tip (143). In addition, a plurality of lower cutting blades (141a) are arranged radially with respect to the tip (143).

[0073] In this way, since the drill bit (140) is provided in a wedge shape, the bone in the interference area can be easily removed while the drill bit (140) moves in an inclined state within the guide hole. In addition, the initial entry of the drill bit (140) into the guide hole is facilitated. Furthermore, when drilling within the guide hole, unnecessary cutting of the implant drilling hole formed for implant placement can be minimized.

[0074] The flat cutting section (141) is provided on the outer surface of the drill blade section (140) and is formed with a step difference from the lower cutting section (140a). A plurality of flat cutting blades (142a) are arranged radially along the outer circumference of the drill blade section (140). The lower edge (142b) of the flat cutting blade (142a) may be formed to be inclined downward toward the lower cutting section (140a). Due to the lower edge (142b), insertion of the drill blade section (140) is facilitated, damage that may occur due to stress concentration at the corners can be prevented, and a uniform cutting surface can be secured when the drill moves in an inclined state. However, it is not limited thereto, and the lower edge (142b) may be formed in a round shape.

[0075] The structure of the lower cutting portion (140a), flat cutting edge (142a), and lower edge (142b) of the drill bit portion (140) allows for easy removal of bone that may interfere when installing the abutment.

[0076] FIG. 5 is a partial enlarged cross-sectional view of the drill body and stopper portion according to the first embodiment of the present invention.

[0077] Referring to FIG. 5, the drill body (120) may include a tapered outer surface (121) with a diameter that decreases as it goes downward, a apex (122) located at the top of the outer surface (121) which has the largest diameter, and a round surface (123) that extends from the bottom of the stopper (130) to the apex (122) with a diameter that increases as it goes downward.

[0078] The diameter of the drill body (120) at the apex (122) may be the same as the inner diameter of the guide hole. That is, the circumference of the drill body (120) comes into contact with the inner surface of the guide hole, so that the dental drill device is stably supported by the guide device.

[0079] In addition, since the upper inner edge of the guide hole is not interfered with by the rounded surface (123) by the drill body (120), the drill body (120) can rotate smoothly inside the guide hole.

[0080] Additionally, the outer surface (121) of the drill body (120) may be formed at an angle α with respect to the central axis (C1) of the drill body (120). At this time, the lower surface (131) of the stopper (130) may be formed at an angle α with respect to a plane perpendicular to the central axis (C1) of the drill body (120).

[0081] That is, the outer surface (121) of the drill body (120) and the lower surface (131) of the stopper (130) are inclined at the same angle.

[0082] Accordingly, when the drill body (120) is tilted by α with respect to the central axis of the guide hole, the drill body (120) comes into contact with the guide hole and the stopper (130) comes into contact with the edge of the guide hole, so that the dental drill device can be stably supported inside the guide hole.

[0083] In other words, when one side of the lower surface (131) of the stopper part (130) rests on the edge of the guide hole, the outer surface (121) of the drill body part (120) located at the opposite position relative to the central axis (C1) of the drill body part (120) is supported on the inner circumference of the guide hole.

[0084] In other words, when drilling with a dental drill device, the drill body and the stopper are stably supported at two points located opposite the guide hole, so accuracy can be improved during the alveolar bone removal procedure.

[0085] FIG. 6 is an example of use of a dental drill device according to the first embodiment of the present invention.

[0086] Referring to FIG. 6, the dental drill device (100) according to the first embodiment of the present invention is formed with an outer surface (121) having a tapered shape in which the diameter decreases as it goes downward, and the stopper part (130) is inclined at the same angle as the outer surface (121), so it can be positioned at an angle (α) inclined with respect to the central axis (C2) of the guide hole. In other words, the dental drill device (100) can move from 0 degrees to a predetermined angle (α) with respect to the central axis (C2) of the guide hole.

[0087] That is, the total flow angle inside the guide hole of the dental drill device (100) can be limited to 2α with respect to the center axis (C2) of the guide hole.

[0088] FIG. 7 is a cross-sectional view of a dental drill device tilted to one side as much as possible, as in FIG. 6A, and FIG. 8 is a cross-sectional view of a dental drill device tilted to the other side as much as possible, as in FIG. 6B.

[0089] Referring to FIG. 7, as the outer surface (121) and the lower surface (131) are formed at the same angle α, when the dental drill device (100) is tilted to one side by α, the drill bit (140) can cut the outer side area of ​​the guide hole (11). Here, the outer side area of ​​the guide hole (11) refers to the outer side of the virtual inner circumference (11a) that extends parallel downward from the inner circumference of the guide hole (11).

[0090] Additionally, one side of the lower surface (131) of the stopper part (130) is seated on one edge of the guide hole (11), and the outer surface (121) of the drill body part (120), which is positioned symmetrically to the lower surface (131) with respect to the central axis (C1) of the drill body part (120), is supported on the inner circumference of the guide hole. Furthermore, the drill blade part (140) can cut the outer one-sided area of ​​the guide hole (11).

[0091] Referring to FIG. 8, as the outer surface (121) and the lower surface (131) are formed at the same angle α, when the dental drill device (100) is tilted to the other side by α, the drill bit (140) can cut the other side area of ​​the guide hole (11), that is, the outer side of the virtual inner surface (11a).

[0092] Additionally, one side of the lower surface (131) of the stopper part (130) is seated on the other edge of the guide hole (11), and the outer surface (121) of the drill body part (120), which is symmetrical to the lower surface (131) with respect to the central axis (C1) of the drill body part (120), is supported on the inner circumference of the guide hole (11).

[0093] FIG. 9 is a drawing showing the procedure of an implant and an angled abutment in a tilted state using a dental drill device according to the first embodiment of the present invention.

[0094] Referring to FIG. 9(a), a drilling hole into which an implant is inserted can be formed at an angle by a dental drill in the alveolar bone and gum. At this stage, a guide device is used to ensure that the drilling hole is drilled at a desired angle.

[0095] Referring to FIGS. 9(b) and (c), in order to insert the angled abutment (2), the alveolar bone (3) and gum (4) interfering with the protrusion (2a) of the angled abutment (2) must be removed. Since the dental drill device (100) of the present invention is capable of cutting the outer side of the virtual inner circumference (11a) of the guide device (10), the gum (4) or alveolar bone (3) interfering with the protrusion (2a) can be removed while using the guide device (10). Subsequently, the implant (1) and the angled abutment (2) are implanted into the drilling hole.

[0096] Referring to FIG. 9(d), the implant (1) and angled abutment (2) are stably positioned as the alveolar bone (3) and gum (4) naturally recover.

[0097] The dental drill device according to the present invention can also partially remove the outer region of the guide hole through the circumferential movement of the drill bit when it moves in the circumferential direction with respect to the central axis of the guide hole. At this time, since the dental drill device is stably supported at two points located opposite each other with respect to the central axis of the guide hole, user convenience is improved while accuracy during the alveolar bone removal procedure can be enhanced.

[0098] The dental drill device according to the present invention allows the drill body portion to rotate relative to the guide hole in a state inclined with respect to the central axis of the guide hole within the inner circumference of the guide hole. Accordingly, the user can intentionally remove bone in the interference area.

[0099] The dental drill device according to the present invention allows the drill body to move within the inner circumference of the guide hole at an angle less than a predetermined angle with respect to the central axis of the guide hole. Accordingly, the user can easily remove bone in the interference area.

[0100] FIG. 10 is a drawing relating to a dental drill device according to a second embodiment of the present invention mounted on a sleeve, FIG. 11 is a perspective view of a dental drill device according to a second embodiment of the present invention, and FIG. 12 is a partial enlarged cross-sectional view of a drill body part and a stopper part according to a second embodiment of the present invention.

[0101] Hereinafter, parts overlapping with the first embodiment above are omitted, and the second embodiment of the present invention is described. Identical or similar components are assigned identical or similar reference numerals, and detailed descriptions thereof are omitted.

[0102] Referring to FIGS. 10 to 12, a dental drill device (200) according to a second embodiment of the present invention includes a shank portion (210), a drill body portion (220), a stopper portion (230), and a drill blade portion (240).

[0103] The drill body portion (220) extends radially outward from the center of rotation of the shank portion (210) and includes a rounded surface on its outer circumference. Specifically, the drill body portion (220) is formed in a spherical shape, and the maximum diameter of the drill body portion (220) may be formed to be larger than the inner circumference of the guide hole. In this case, only a portion of the drill body portion (220) may be inserted into the guide hole.

[0104] However, it is not limited thereto, and the maximum diameter of the drill body (220) may correspond to the inner circumference of the guide hole. In this case, the drill body (220) may be inserted into the guide hole. Meanwhile, the drill body (220) may include one or more grooves. One or more grooves may be provided on the outer surface of the drill body (220) so as to extend in the axial direction of the drill body (220). One or more grooves may be arranged on the outer surface of the drill body (220) spaced apart in the rotational direction of the drill body (220). At this time, one or more grooves may be formed by being recessed inward from the outer surface of the drill body (220).

[0105] According to this structure, when the drill body (220) is inserted into the guide hole, a gap is formed between one or more grooves and the inner circumference of the guide hole through which water can be supplied, and the effect of smoothly supplying water through the gap during the implant procedure can be obtained.

[0106] The circumference of the drill body (220) comes into contact with the inner circumference of the guide hole, so that the dental drill device is stably supported by the guide device. As a result, the drill body (220) can rotate smoothly along the inner circumference of the guide hole.

[0107] A stopper part (230) is provided on the upper part of the drill body part (220), and a drill blade part (240) is provided on the lower part of the drill body part (220). The stopper part (230) is located between the drill body part (220) and the shank part (210).

[0108] For example, the stopper portion (230) extends radially outward from the bottom of the shank portion (210). Here, the lower surface (231a) of the stopper portion (230) is configured to be constrained and seated on the upper edge of the guide hole, and it is preferable that it has a diameter wider than the inner circumference of the guide hole. The lower surface (231a) of the stopper portion (230) extends radially perpendicular to the central axis direction of the shank portion (210).

[0109] The overall flow angle of the dental drill device (200) can be limited according to the radial length of the stopper part (230). For example, as the radial length of the stopper part (230) increases, the maximum angle of inclination of the dental drill device (200) with respect to the center axis of the guide hole decreases. As the radial length of the stopper part (230) decreases, the maximum angle of inclination of the dental drill device (200) with respect to the center axis of the guide hole increases.

[0110] Meanwhile, the corner of the stopper part (230) that contacts the top of the guide hole may be chamfered or rounded to allow for smooth rotational movement.

[0111] The drill blade portion (240) may be composed of an extension portion (240a) extending in the direction of the central axis of the drill body portion (220) and a cutting portion (241) including a plurality of cutting blades formed at the bottom of the extension portion (240a).

[0112] FIG. 13 is a cross-sectional view of a dental drill device according to a second embodiment of the present invention in a state in which it is tilted to one side as much as possible, and FIG. 14 is a cross-sectional view of a dental drill device according to a second embodiment of the present invention in a state in which it is tilted to the other side as much as possible.

[0113] Referring to FIG. 13, by forming the drill body part (220) into a spherical shape and forming the radial length of the stopper part (230) to a predetermined length, the dental drill device (200) can be tilted to one side by a maximum of α. At this time, one side of the lower surface (231a) of the stopper part (230) rests on one edge of the guide hole (21), and the circumference of the drill body part (220) is supported on the inner circumference of the guide hole (21).

[0114] Accordingly, the drill bit (240) can cut a portion of the outer region of the guide hole (21). Here, the outer region of the guide hole (21) refers to the outer side of a virtual inner circumference (21a) that extends parallel downward from the inner circumference of the guide hole (21).

[0115] Referring to FIG. 14, by forming the drill body part (220) into a spherical shape and forming the radial length of the stopper part (230) to a predetermined length, the dental drill device (200) can be tilted to the other side by a maximum of α. At this time, one side of the lower surface (231a) of the stopper part (230) rests on the other edge of the guide hole (21), and the circumference of the drill body part (220) is supported on the inner circumference of the guide hole (21).

[0116] By this, the drill bit (240) can cut the other side of the outer region of the guide hole (21).

[0117] That is, when the dental drill device (200) moves in the circumferential direction with respect to the central axis of the guide hole, the stopper part (230) can limit the total movement angle to 2α with respect to the central axis of the guide hole.

[0118] That is, when the dental drill device (200) moves in a circumferential direction with respect to the central axis of the guide hole, the outer area of ​​the guide hole can also be partially removed by the circumferential movement of the drill bit (240), and since the circumference of the drill body (220) is supported on the inner circumference of the guide hole (21) and one side of the lower surface (231a) of the stopper (230) is seated on one side edge of the guide hole (21), the user's convenience is improved and accuracy can be improved during the alveolar bone removal procedure.

[0119] Meanwhile, although it has been described that the lower surface (231a) of the stopper part (230) extends in a radial direction perpendicular to the central axis direction of the shank part (210) and one side of the lower surface (231a) rests on one side edge of the guide hole (21), it is not limited thereto.

[0120] FIGS. 15 and 16 are cross-sectional views illustrating other examples of the lower surface of a stopper portion according to a second embodiment of the present invention.

[0121] For example, referring to FIG. 15, the lower surface (231b) of the stopper part (230) may be formed in a tapered shape with a diameter that decreases as it goes downward. In this case, when the dental drill device is tilted to one side as much as possible, the lower surface (231b) comes into surface contact with the upper surface of the guide hole, so that the dental drill device can be supported more stably on the guide device or sleeve (20).

[0122] Additionally, referring to FIG. 16, the stopper portion (230) may include a first lower surface (231c) that extends radially perpendicular to the central axis of the shank portion (210), and a second lower surface (232c) that extends radially outward from the first lower surface (231c) and has a tapered shape with a diameter that increases as it goes upward.

[0123] In one embodiment, a neck portion (233c) may be formed between the first lower surface (231c) and the drill body portion (220).

[0124] The diameter of the neck portion (233c) can be formed to be smaller than the maximum diameter of the drill body portion (220). Only when the diameter of the neck portion (233c) is formed to be smaller than the maximum diameter of the drill body portion (220) can the drill body portion (220) move while tilted within the guide hole.

[0125] Additionally, the diameter of the neck portion (233c) may be formed to be larger than the diameter of the shank portion (210). This is because as the diameter of the neck portion (233c) decreases, the stress applied to the neck portion (233c) increases, and there is a possibility of breakage.

[0126] Since the upper inner edge of the guide hole is not interfered with by the second lower surface (231c) and the neck portion (233c), the drill body portion (220) can rotate smoothly inside the guide hole.

[0127] Additionally, when the dental drill device is tilted to one side as much as possible, the second lower surface (232c) comes into line contact with the upper surface of the guide hole, so that the dental drill device can be supported more stably on the guide device or sleeve (20).

[0128] FIG. 17 is a perspective view of a dental drill device according to a third embodiment of the present invention, and FIG. 18 is a partial enlarged cross-sectional view of a drill body and a stopper part according to a third embodiment of the present invention.

[0129] Hereinafter, a dental drill device (300) according to a third embodiment of the present invention is described in detail with reference to FIGS. 17 and 18. Parts that overlap with the previously described embodiment are omitted, and a second embodiment of the present invention is described. Identical or similar components are given identical or similar reference numerals, and detailed descriptions thereof are omitted.

[0130] The drill body portion (320) extends radially outward from the center of rotation of the shank portion (310). The drill body portion (320) is formed in a tapered shape with a diameter that decreases toward the lower side and is formed symmetrically with respect to the central axis (C1). The widest part of the drill body portion (320) has an outer diameter corresponding to the inner circumference of the guide hole.

[0131] In detail, the drill body (320) may include a tapered outer surface (321) in which the diameter decreases toward the bottom, a apex (322) located at the top of the outer surface (321) and having the largest diameter, and a rounded surface (323) extending from the bottom of the stopper (330) to the apex (322) in which the diameter increases toward the bottom. At this time, the outer surface (321) of the drill body (320) may be formed at an angle α with respect to the central axis (C1) of the drill body (320). Additionally, the outer surface of the drill body (320) is formed in a conical shape overall.

[0132] A cutting section (341) is formed at the bottom of the drill body (320), including an extension section (340a) and a plurality of cutting blades formed at the bottom of the extension section (340a).

[0133] The diameter of the cutting portion (341) of the drill body portion (320) may be formed to be the same as the diameter of the bottom of the drill body portion (320), that is, the top of the extension portion (340a). It is not limited to this, and the diameter of the cutting portion (341) may be formed to be smaller than the diameter of the bottom of the drill body portion (320). By doing this, when the interference area is relatively narrow, the area can be removed more precisely. In other words, the precision of the cutting operation can be improved.

[0134] The diameter of the drill body (320) at the apex (322) may be the same as the inner diameter of the guide hole. That is, the circumference of the drill body (320) comes into contact with the inner surface of the guide hole, so that the dental drill device is stably supported by the guide device.

[0135] In addition, since the edge of the guide hole is not interfered with by the rounded surface (323) by the drill body (320), the drill body (320) can rotate smoothly along the edge of the guide hole.

[0136] FIG. 19 is a cross-sectional view of a dental drill device according to a third embodiment of the present invention in a state in which it is tilted to one side as much as possible, and FIG. 20 is a cross-sectional view of a dental drill device according to a third embodiment of the present invention in a state in which it is tilted to the other side as much as possible.

[0137] Referring to FIG. 19, as the outer surface (321) is formed at an angle α, when the dental drill device (300) is tilted to one side by α, one side of the lower surface (331a) of the stopper part (330) rests on the edge of one side of the guide hole (21), and the outer surface (321) of the drill body part (320), which is located opposite to the lower surface (331a) with respect to the central axis (C1) of the drill body part (320), comes into line contact with the inner circumference of the guide hole. In addition, the drill blade part (340) can cut a portion of one side of the outer region of the guide hole (21).

[0138] Referring to FIG. 20, as the outer surface (321) is formed at an angle α, when the dental drill device (300) is tilted to the other side by α, the other side of the lower surface (331a) of the stopper part (330) rests on the other edge of the guide hole (21), and the outer surface (321) of the drill body part (320), which is located opposite to the lower surface (331a) with respect to the central axis (C1) of the drill body part (320), comes into line contact with the inner circumference of the guide hole. Additionally, the drill blade part (340) can cut the other side of the outer region of the guide hole (21).

[0139] In other words, when the dental drill moves circumferentially around the central axis of the guide hole, the circumferential movement of the drill bit allows for the partial removal of the outer region of the guide hole. At this time, since the dental drill is stably supported at two points located opposite each other with respect to the central axis of the guide hole, user convenience is improved while accuracy during the alveolar bone removal procedure can be enhanced.

[0140] In addition, by forming the outer surface (321) of the drill body (320) at an angle α, insertion into the guide hole of the dental drill device (300) becomes easier.

[0141] FIGS. 21 and 22 are cross-sectional views illustrating other examples of a stopper part according to a third embodiment of the present invention.

[0142] In FIG. 21, the lower surface (331b) can be formed at an angle α with respect to a plane perpendicular to the central axis (C1).

[0143] In FIG. 22, the second lower surface (332c) can be formed at an angle α with respect to a plane perpendicular to the central axis (C1) of the drill body (320).

[0144] That is, the lower surface (331b) and the second lower surface (332c) are inclined at the same angle as the outer surface (321) of the drill body (320). Additionally, a first lower surface (331c) and a neck (333c) may be formed between the lower surface (331b) and the drill body (320).

[0145] Accordingly, when the drill body (320) is tilted by α with respect to the central axis of the guide hole, the drill body (320) is in line contact with the guide hole and the stopper (330) is in line contact with the edge of the guide hole, so that the dental drill device can be stably supported inside the guide hole.

[0146] In other words, when one side of the lower surface (331b) and the second lower surface (332c) of the stopper part (330) rests on the edge of the guide hole, the outer surface (321) of the drill body part (320), which is located at the opposite position relative to the central axis (C1) of the drill body part (320), is supported on the inner circumference of the guide hole.

[0147] In other words, when the dental drill device moves circumferentially around the central axis of the guide hole, it is stably supported at two points located opposite the guide hole, thereby improving accuracy during the alveolar bone removal procedure.

[0148] FIG. 23 is a partial cross-sectional view of a dental drill device according to the fourth embodiment of the present invention.

[0149] Hereinafter, a dental drill device (300) according to the fourth embodiment of the present invention is described in detail with reference to FIG. 23. Parts that overlap with the previously described embodiment are omitted, and the fourth embodiment of the present invention is described. Identical or similar components are given identical or similar reference numerals, and detailed descriptions thereof are omitted.

[0150] Referring to FIG. 23, the drill body (420) is formed in a roughly spherical shape, and an extension (440a) of the drill blade (440) is formed extending from the lower part of the drill body (420). A rounded surface is formed between the drill body (420) and the extension (440a) so that they can be smoothly connected. However, this is not limited thereto, and a flat inclined surface may be applied instead of a rounded surface.

[0151] In FIG. 23, the lower surface (431a) of the stopper part (430) is shown as a flat surface, but it is not limited thereto and all of the aforementioned examples of lower surfaces may be applied.

[0152] In addition, the drill bit (440) according to the fourth embodiment of the present invention is composed of an extension part (440a), a flat cutting part (441) provided on the side, and a lower cutting part (443) provided at the bottom.

[0153] The extension portion (440a) is formed in a cylindrical shape and is formed to have a diameter approximately equal to that of the shank portion (410). However, it is not limited to this and may be formed to have a diameter smaller than that of the shank portion (410).

[0154] The drill bit (440) has the same shape as the drill bit of Example 1 (see FIG. 4), and the structure of the flat cutting edge (442a), lower edge (442b), and lower cutting part (443) of the drill bit (440) allows for easy removal of bone that may interfere when installing the abutment.

[0155] The foregoing description of the present invention is for illustrative purposes only, and those skilled in the art will understand that other specific forms can be easily modified without altering the technical spirit or essential features of the present invention. Therefore, the embodiments described above should be understood as illustrative in all respects and not restrictive. For example, each component described as a single unit may be implemented in a distributed manner, and components described as distributed may likewise be implemented in a combined form.

[0156] The scope of the present invention is defined by the claims set forth below, and all modifications or variations derived from the meaning and scope of the claims and equivalent concepts thereof should be interpreted as being included within the scope of the present invention.

[0157]

[0158] [Explanation of the symbol]

[0159] 10 guide device

[0160] 20 sleeves

[0161] 100, 200, 300, 400 dental drill devices

Claims

1. A dental drill device inserted along a guide hole of a guide device installed in the oral cavity of a patient, A shank portion that is coupled to a dental handpiece; A drill body connected to the lower part of the shank portion, rotated by the rotational force of the dental handpiece, and supported on the inner circumference of the guide hole; A drill blade formed at the lower part of the above drill body; and It includes a stopper portion formed between the drill body portion and the shank portion, having a diameter wider than the inner circumference of the guide hole, A dental drill device in which the drill body portion is movable in an inclined state with respect to the central axis of the guide hole within the inner circumference of the guide hole.

2. In Paragraph 1, A dental drill device having an outer surface of the drill body portion that has a tapered shape with a diameter decreasing towards the bottom.

3. In Paragraph 2, The lower surface of the above stopper part is, A dental drill device that is supported at the upper part of a guide hole and has a tapered shape with a diameter that decreases toward the lower side.

4. In Paragraph 3, A dental drill device in which the outer surface of the drill body and the lower surface of the stopper are inclined by α.

5. In Paragraph 4, The above drill body moves at a maximum of α or less with respect to the central axis of the guide hole, and A dental drill device in which the drill bit moves at a maximum of α or less with respect to the central axis of the guide hole and cuts the outer region of the guide hole.

6. In Paragraph 5, A dental drill device in which the drill body is inclined by up to α with respect to the center axis of the guide hole and is in contact with the stopper, and is capable of rotating circumferentially with respect to the center axis of the guide hole.

7. In Paragraph 2, The above drill body part is, A dental drill device comprising a round surface disposed between the stopper portion and the outer surface, the diameter of which gradually decreases toward the upper side.

8. In Paragraph 1, The above drill bit is, A plurality of bottom cutting blades provided at the bottom and A dental drill device comprising a plurality of flat cutting blades provided on the side.

9. In Paragraph 9, A dental drill device in which the lower cutting blade is formed to be pointed as the cross-sectional area decreases toward the tip.

10. In Paragraph 8, A dental drill device in which the lower cutting blade and the flat cutting blade are arranged in a radially spreading form.

11. In Paragraph 1, A dental drill device having a spherical drill body.

12. In Paragraph 1, The above drill body part is, A tapered outer surface with a diameter that decreases toward the bottom, and A dental drill device comprising a round surface disposed between the stopper portion and the outer surface, the diameter of which gradually decreases toward the upper side.

13. In Paragraph 12, The lower surface of the above stopper part is supported on the upper part of the guide hole, and The lower surface of the stopper part has a tapered shape in which the diameter decreases towards the bottom, and A dental drill device in which the outer surface of the drill body and the lower surface of the stopper are inclined by α.

14. In Paragraph 1, A dental drill device in which the lower surface of the stopper part is supported on the upper part of the guide hole, and the lower surface of the stopper part is parallel to the radial direction of the central axis.

15. In Paragraph 1, The lower surface of the above stopper part is supported on the upper part of the guide hole, and The lower surface of the above stopper part is, It includes a first lower surface parallel to the radial direction of the central axis and a second lower surface having a tapered shape that extends radially outward from the first lower surface and increases in diameter toward the upper side, A dental drill device in which the above-mentioned second lower surface is supported on the upper part of the guide hole.

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