Dental implant fixture

Abstract

A dental implant fixture is disclosed. A dental implant fixture according to an embodiment of the present invention comprises: an alveolar in-bone implant fixation part implanted and fixed to the abnormal alveolar bone, the abnormal alveolar bone having a bone defect part in which a bone is partially lost or formed to be relatively thin or flat; a machined cuff which is provided to be integrally connected to the alveolar in-bone implant fixation part and disposed in a bone defect area of the alveolar bone, and one side of which is in contact with and supported by the bone defect part so that implant stability of the alveolar in-bone implant fixation part with respect to the alveolar bone is increased and maintenance from the outside is enabled.

Description

Dental implant fixture

[0001] The present invention relates to a dental implant fixture, and more particularly, to a dental implant fixture that can be easily implanted into the alveolar bone of a patient with an abnormal bone defect, such as a partial loss of bone due to aging or a lesion or an abnormally thin or low bone, without alveolar bone augmentation surgery, and can also facilitate maintenance, thereby significantly increasing the success rate of implant surgery compared to the past.

[0002] Implants originally meant a replacement for lost human tissue, but in dentistry, they refer to a series of procedures to transplant artificial teeth.

[0003] This is a procedure in which a fixture made of titanium, which is not rejected by the human body, is implanted into the alveolar bone where a tooth has fallen out to replace the lost tooth root, and then an artificial tooth is fixed to it to restore the function of the tooth.

[0004] In the case of general prosthetics or dentures, the surrounding teeth and bones deteriorate over time, but implants do not damage the surrounding tooth tissues, and have the same function and shape as natural teeth, but do not develop cavities, so they have the advantage of being able to be used semi-permanently.

[0005] Artificial tooth surgery (also called implant surgery) varies depending on the type of fixture, but it is generally completed by drilling a hole in the implantation location using a specific drill, implanting the fixture into the alveolar bone, osseointegrating it with the bone, then attaching an abutment to the fixture, and then placing the final prosthesis on the abutment.

[0006] Implants not only restore single missing teeth, but also enhance the function of dentures in patients with partial or complete edentulism, improve the aesthetic aspect of dental prosthesis restoration, and further help to stabilize the teeth by dispersing excessive stress on the surrounding supporting bone tissue.

[0007] These implants generally include a fixture that is implanted as an artificial tooth root, an abutment that is bonded to the fixture, an abutment screw that secures the abutment to the fixture, and an artificial tooth that is bonded to the abutment. Here, before bonding the abutment to the fixture, that is, during the period until the fixture is osseointegrated with the alveolar bone, a healing abutment (not shown) is bonded to the fixture and maintained in a bonded state.

[0008] The fixture, a component of the implant, is implanted into a drill hole created in the alveolar bone at the implant site using a drill or other device, and serves as an artificial tooth root. Therefore, the fixture must be firmly implanted into the alveolar bone.

[0009] Accordingly, a threaded portion is formed on the outer surface of the fixture so that it can be firmly connected to the inner wall of the alveolar bone forming the drill hole. This threaded portion is inserted into the alveolar bone, thereby not only allowing the fixture and the alveolar bone to be firmly connected, but also increasing the contact area between the fixture and the alveolar bone, thereby strengthening the fixing force of the fixture to the alveolar bone.

[0010] Meanwhile, patients with abnormal alveolar ridges, such as those with partial alveolar bone loss due to aging or lesions, or those with unusually thin or low alveolar bone, cannot be implanted with conventional fixtures. Therefore, it is extremely common to perform an additional surgical procedure called alveolar bone augmentation to secure the necessary bone volume as a prerequisite for fixture implantation.

[0011] However, these procedures can pose a financial burden on patients, and even after undergoing them, a positive prognosis is unlikely. Furthermore, maintenance is particularly challenging. Consequently, many patients are reluctant to undergo implant surgery, leading to an increase in unmet needs. This has led to a growing need for a novel dental implant fixture to address these issues.

[0012] Therefore, the technical problem to be achieved by the present invention is to provide a dental implant fixture that can be easily implanted into the alveolar bone without alveolar bone augmentation surgery even in patients with abnormal alveolar bone defects such as partial bone loss due to aging or a lesion or bone being unusually thin or low, and can also be maintained easily, thereby significantly increasing the success rate of implant surgery compared to the past.

[0013] According to the present invention, even in the case of patients with abnormal alveolar bone, such as those with bone defects such as partial bone loss due to aging or lesions or unusually thin or low bone, implants can be easily implanted into the corresponding alveolar bone without alveolar bone augmentation surgery, and maintenance can be made easier, so that the success rate of implant surgery can be significantly increased compared to the past.

[0014] Figure 1 is a structural diagram of an abnormal alveolar ridge into which a dental implant fixture according to one embodiment of the present invention is to be implanted.

[0015] FIG. 2 is a drawing showing a state in which a dental implant fixture according to one embodiment of the present invention is implanted in the abnormal alveolar ridge of FIG. 1.

[0016] FIG. 3 is a perspective view of a dental implant fixture according to one embodiment of the present invention.

[0017] Figures 4 to 8 are drawings showing the dental implant fixture of Figure 3 at different angles.

[0018] Fig. 9 is a partial cut-away perspective view of the dental implant fixture of Fig. 3.

[0019] Fig. 10 is a half-cut cross-sectional perspective view of the dental implant fixture of Fig. 3.

[0020] Fig. 11 is a cross-sectional view taken along line AA of Fig. 8.

[0021] According to one aspect of the present invention, a dental implant fixture can be provided, characterized in that it includes an alveolar bone implant fixing part that is implanted and fixed in an abnormal alveolar bone having a bone defect part in which bone is partially lost or formed relatively thin or low; and a machined cuff that is provided to be integrally connected to the alveolar bone implant fixing part and is positioned in a bone defect area of ​​the alveolar bone, and one side of the machined cuff is supported by contacting the bone defect part, thereby increasing the implantation stability of the alveolar bone implant fixing part while enabling external maintenance.

[0022] The machined cuff can be manufactured in a cylindrical shape of a non-screw type, and one side wall of the machined cuff can be in contact with and supported by the bone defect to increase the stability of the alveolar bone implant fixing part for implantation into the alveolar bone, and the other side wall can be exposed to enable external maintenance.

[0023] The above machined cuff may be a long machined cuff manufactured to be relatively long, and the outer wall line of the machined cuff may form a straight line.

[0024] The machined cuff may be provided with at least one groove (cell-like groove) formed radially from the outer surface to a predetermined depth.

[0025] The at least one groove may be a plurality of grooves arranged in a plurality along the length direction of the machined cuff.

[0026] The above plurality of grooves have a triangular cross-section and can be arranged at equal intervals along the length direction of the machined kerf.

[0027] The above alveolar bone implantation fixation part can be manufactured as a screw type in which an external screw thread is formed on the outer wall for implantation into the alveolar bone, and can be implanted in a state in which it is completely inserted into the interior of the alveolar bone excluding the bone defect and fixed to the alveolar bone.

[0028] The above external threaded portion may be formed in a spiral shape along the outer circumference of the alveolar bone implant fixation portion, but may be formed continuously without any interrupted sections.

[0029] An internal threaded portion may be formed inside the above alveolar bone implant fixation portion or the machined cuff to which an abutment screw for fixing an abutment is fastened.

[0030] The internal threaded portion may be positioned within the alveolar bone implant fixation portion, but may be positioned to overlap with the external threaded portion.

[0031] The total length of the internal threaded portion can be processed to be shorter than half the total length of the external threaded portion.

[0032] The machined cuff may further include an abutment contact support portion formed on the inner wall of the entrance side and joined while the abutment is in contact with and supported.

[0033] The above abutment contact support portion may have a conical slope shape with a cross-sectional area that gradually decreases as it moves from the machined cuff toward the alveolar bone implantation fixation portion.

[0034] The machined cuff may further include a rotation prevention unit formed on the inner wall thereof and provided in an end region of the abutment contact support portion facing the alveolar bone implantation fixation portion, and for preventing rotation of a predetermined tool by catching it.

[0035] The machined cuff may further include an abutment rotation prevention unit formed on the inner wall thereof and provided in an end region of the rotation prevention unit for tool catching, which prevents arbitrary rotation of the abutment.

[0036] The above abutment anti-rotation part can form an octa shape when viewed in a plane.

[0037] The machined cuff may further include a cylindrical portion formed on the inner wall thereof and provided in the end region of the abutment rotation prevention portion, and processed into a circular cross-section.

[0038] The length of the cylinder portion can be processed to be shorter than the length of the abutment anti-rotation portion and longer than the length of the tool-catching anti-rotation portion with respect to the direction in which the alveolar bone implantation fixing portion is implanted into the alveolar bone, and the length of the abutment contact support portion can be processed to be shorter than the length of the abutment anti-rotation portion.

[0039] The above alveolar bone implant fixation part can form a tapered part whose diameter becomes smaller as it goes downward.

[0040] At least one cutting edge portion may be formed on the outer wall of the above alveolar bone implant fixation portion.

[0041] In order to fully understand the present invention, its operational advantages, and the objects achieved by the practice of the present invention, reference should be made to the accompanying drawings illustrating preferred embodiments of the present invention and the contents described in the accompanying drawings.

[0042] Hereinafter, the present invention will be described in detail by describing preferred embodiments thereof with reference to the attached drawings. The same reference numerals in each drawing represent the same components.

[0043] FIG. 1 is a structural diagram of an abnormal alveolar ridge into which a dental implant fixture according to an embodiment of the present invention is to be implanted, FIG. 2 is a diagram showing a state in which a dental implant fixture according to an embodiment of the present invention is implanted in the abnormal alveolar ridge of FIG. 1, FIG. 3 is a perspective view of a dental implant fixture according to an embodiment of the present invention, FIGS. 4 to 8 are drawings illustrating the dental implant fixture of FIG. 3 from different angles, FIG. 9 is a partial cut-away perspective view of the dental implant fixture of FIG. 3, FIG. 10 is a half-cut perspective view of the dental implant fixture of FIG. 3, and FIG. 11 is a cross-sectional view taken along line AA of FIG. 8.

[0044] Referring to these drawings, the dental implant fixture (100) according to the present embodiment can be easily implanted into the corresponding alveolar bone (10) without alveolar bone augmentation surgery even in the case of a patient with an abnormal alveolar bone (10) such as FIGS. 1 and 2, where the bone is partially lost due to aging or a lesion, or where the bone is unusually thin or low, and maintenance can be made easier, thereby significantly increasing the success rate of the implant procedure compared to the past.

[0045] The dental implant fixture (100) according to the present embodiment capable of providing such effects is composed of two parts, an alveolar bone implant fixing part (110) and a machined cuff (130), and can be implanted into an alveolar ridge (10), particularly an abnormal alveolar ridge (10), as shown in FIGS. 1 and 2.

[0046] Before explaining the dental implant fixture (100) according to the present embodiment, the alveolar ridge (10) will be described with reference to FIGS. 1 and 2.

[0047] The alveolar ridge (10) refers to the thickened, protruding bone tissue. Teeth are surrounded by the gums and alveolar bone (10). The gums surround and protect the teeth, while the alveolar ridge (10) supports them.

[0048] If the alveolar bone (10) is poor, the teeth are bound to become loose. Similarly, when performing an implant procedure, the amount of alveolar bone must be sufficient or normal to allow the fixture to be implanted.

[0049] If the alveolar bone is not normal, that is, if there is an abnormal alveolar ridge (10) with a bone defect as shown in Fig. 1, it is extremely common to perform an additional surgery called alveolar bone augmentation. For reference, the bone defect refers to the bone defect area (11) in Fig. 1 where the alveolar bone is partially lost due to aging or a lesion, or where the alveolar bone is formed to be unusually thin or low, as mentioned above.

[0050] As shown in Fig. 1, it is extremely common to perform alveolar bone augmentation surgery to form the bone defect (11) normally in the alveolar bone (10) having a bone defect (11). However, such alveolar bone augmentation surgery may not only cause a financial burden on the patient, but it is also difficult to expect a positive prognosis even if alveolar bone augmentation surgery is performed. In particular, maintenance is very difficult. Therefore, patients cannot help but be reluctant to undergo implant surgery.

[0051] However, since the dental implant fixture (100) according to the present embodiment is completely different from a typical fixture, even in the case of an alveolar bone (10) having a bone defect (11) as in FIG. 1, i.e., an abnormal alveolar bone (10), the dental implant fixture (100) can be implanted as in FIG. 2 without alveolar bone augmentation surgery. In addition, the dental implant fixture (100) according to the present embodiment can be easily maintained, thereby significantly increasing the success rate of implant surgery compared to the past.

[0052] The structure of the dental implant fixture (100) according to this embodiment will be described in detail in the order of the alveolar bone implant fixation part (110) and the machined cuff (130).

[0053] First, the alveolar bone implantation fixation part (110) is a part that is implanted and fixed in an abnormal alveolar bone (10) having a bone defect part (11, see FIG. 1) in which the bone is partially lost or formed relatively thin or low, as shown in FIG. 2.

[0054] In the dental implant fixture (100) according to the present embodiment, the screw portion corresponds to the alveolar bone implant fixing portion (110). That is, the alveolar bone implant fixing portion (110) is manufactured as a screw type in which an external screw thread portion (111) for implantation into the alveolar bone (10) is formed on the outer wall.

[0055] At this time, the alveolar bone implant fixation part (110) manufactured in a screw type is implanted in a state where it is completely inserted into the interior of the alveolar bone (10) excluding the bone defect part (11), as shown in Fig. 2, and is fixed to the alveolar bone (10). Therefore, it can provide a stronger fixation force.

[0056] The external screw thread (111) provided on the outside of the alveolar bone implantation fixation part (110) is formed in a spiral shape along the outer circumference of the alveolar bone implantation fixation part (110), but is formed continuously without any interrupted sections. Therefore, as shown in FIG. 2, the work of implanting the alveolar bone implantation fixation part (110) in a state where it is completely inserted into the inside of the alveolar bone (10) excluding the bone defect part (11) can be facilitated. In addition, it can contribute to increasing the implantation fixation strength.

[0057] The alveolar bone implant fixation part (110) forms a tapered part (112) whose diameter becomes smaller as it goes down. Therefore, as shown in Fig. 2, the implantation work of completely inserting the alveolar bone implant fixation part (110) into the interior of the alveolar bone (10) excluding the bone defect part (11) can be made much easier.

[0058] The lower portion of the alveolar bone implant fixation device (110) may be formed sharper than other portions to form an entry direction guide portion (115) that guides the entry direction of the alveolar bone implant fixation device (110). Of course, the entry direction guide portion (115) is optional and does not necessarily have to be formed. In other words, it should be said that a fixture without the entry direction guide portion (115) also falls within the scope of the present invention.

[0059] At least one cutting edge portion (113) is formed on the outer wall of the alveolar bone implant fixation portion (110). The cutting edge portion (113) corresponds to a non-threaded section without threads, and the sharp end of the cutting edge portion (113) assists in strong implantation into the alveolar bone (10).

[0060] The cutting edge portion (113) may be formed as one, or as in the present embodiment, may be formed as multiple cutting edges. When multiple cutting edges (113) are formed, the cutting edges (113) may be arranged at equal intervals.

[0061] Of course, when such a cutting edge portion (113) is formed, the convenience of implantation is high, but in some cases, the cutting edge portion (113) may not be present. Therefore, even in the case of a model without a cutting edge portion (113), it should be said that it falls within the scope of the present invention.

[0062] Next, the machined cuff (130) refers to the remaining portion of the dental implant fixture (100) according to the present embodiment, excluding the alveolar bone implant fixation portion (110).

[0063] In other words, the machined cuff (130) is provided to be integrally connected to the alveolar bone implantation fixation part (110), and is placed in the bone defect area (11) of the alveolar bone (10). One side of the machined cuff (130) is in contact with and supported by the bone defect area (11), thereby enhancing the implantation stability of the alveolar bone implantation fixation part (110) in the alveolar bone (10) while enabling external maintenance.

[0064] In this embodiment, the machined cuff (130) is manufactured in a non-screw type cylindrical shape. Accordingly, the outer wall line of the machined cuff (130) forms a straight line. Therefore, the convenience of processing is high.

[0065] When the dental implant fixture (110) according to the present embodiment is implanted into the alveolar bone (10) having the bone defect (11) as shown in FIGS. 1 and 2, the fixation force is excellent because the alveolar bone implantation fixing part (110) is implanted in a state where it is completely inserted into the alveolar bone (10). At this time, the machined cuff (130) also has one side that is in contact with and supported by the bone defect (11), so it significantly helps to increase the implantation stability of the alveolar bone implantation fixing part (110) with respect to the alveolar bone (10). That is, one side wall of the machined cuff (130) is in contact with and supported by the bone defect (11), thereby increasing the implantation stability of the alveolar bone implantation fixing part (110) with respect to the alveolar bone (10).

[0066] And, as shown in FIG. 2, the other side wall of the machined cuff (130) takes on an exposed form, and because the other side wall of the machined cuff (130) is exposed in this way, maintenance of the dental implant fixture (100) from the outside is possible. In other words, the area where bone quantity is insufficient due to a bone defect (11) can be treated with the machined cuff (130), and even if exposed as shown in FIG. 2, the probability of inflammation occurring is low, making maintenance easy.

[0067] In this embodiment, the machined cuff (130) is applied as a long machined cuff (130) that is manufactured to be relatively long. The long machined cuff (130) may have a length roughly similar to the overall length of the alveolar bone implantation fixation part (110). Of course, unlike the drawing, the long machined cuff (130) may be much longer than the overall length of the alveolar bone implantation fixation part (110), and all of these matters should be considered to fall within the scope of the present invention.

[0068] The machined cuff (130) is provided with a groove (131, Cell-like groove). The groove (131) is provided to prevent gum recession. In other words, the smooth surface of the machined cuff (130), excluding the groove (131), greatly helps prevent periodontitis, and the groove (131) prevents gum recession.

[0069] In this embodiment, the groove (131) is formed by recessing a predetermined depth in the radial direction from the outer surface of the machined cuff (130). At this time, the grooves (131) are arranged in a plurality along the longitudinal direction of the machined cuff (130). The plurality of grooves (131) have a triangular cross-section and are arranged at equal intervals along the longitudinal direction of the machined cuff (130).

[0070] Inside the machined cuff (130), an abutment contact support portion (141), a rotation prevention portion (142) for tool catching, an abutment rotation prevention portion (143), a cylinder portion (144), and an internal thread portion (145) are formed along the direction of the alveolar bone implant fixation portion (110) from the end of the machined cuff (130).

[0071] The abutment contact support portion (141) is formed on the inner wall of the entrance side of the machined cuff (130) and is a portion to which the abutment (not shown) is joined while being contact-supported.

[0072] There are several types of abutments that support artificial teeth. The abutment that is coupled to the fixture (100) of the dental implant according to the present embodiment takes the form of being coupled while being inserted into the interior of the machined cuff (130). At this time, the outer wall of the abutment is supported by making contact with the abutment contact support portion (141) so that it can be stably coupled.

[0073] In this embodiment, the abutment contact support portion (141) has a conical slope shape with a gradually decreasing cross-sectional area from the machined cuff (130) toward the alveolar bone implantation anchor portion (110). Therefore, it is easy to insert the abutment into the machined cuff (130), and after insertion, it can provide strong fixation and support.

[0074] The rotation prevention part (142) for tool jamming is a part provided in the end area of ​​the abutment contact support part (141) on the inner wall of the machined cuff (130).

[0075] This rotation prevention part (142) for tool hooking is formed on the inner wall of the machined cuff (130) and is provided in the end area of ​​the abutment contact support part (141) facing the alveolar bone implant fixing part (110), and is used as a part where a predetermined tool is hooked to prevent rotation. By inserting the tool here, the work of implanting the fixture (100) of the dental implant according to the present embodiment can be performed.

[0076] The abutment rotation prevention part (143) is formed on the inner wall of the machined kerf (130) and is provided in the end area of ​​the tool-catching rotation prevention part (142), and serves to prevent arbitrary rotation of the abutment.

[0077] In this embodiment, the abutment anti-rotation part (143) may have an octa-shaped shape when viewed from a plan view. Of course, in addition to the octa-shaped shape, the abutment anti-rotation part (143) may also have a hexa-shaped shape. Regardless of the shape, the abutment anti-rotation part (143) has an angular inner wall structure, so when the abutment is bonded to this, the rotation of the abutment is prevented. Of course, for this to happen, an octa-shaped wall that conforms to the abutment anti-rotation part (143) must be formed on the abutment.

[0078] The cylinder portion (144) is formed on the inner wall of the machined cuff (130), is provided in the end area of ​​the abutment rotation prevention portion (143), and is a portion processed into a circular cross-section.

[0079] The cylinder portion (144) also functions as a space corresponding to the shape of the abutment. Therefore, depending on the shape of the abutment, the cylinder portion (144) may be structurally omitted.

[0080] When machining an abutment contact support (141), a rotation prevention part (142) for tool engagement, an abutment rotation prevention part (143), and a cylinder part (144) inside a machined cuff (130), the length of the cylinder part (144) can be machined to be shorter than the length of the abutment rotation prevention part (143) and longer than the length of the rotation prevention part (142) for tool engagement with respect to the direction in which the alveolar bone implantation fixing part (110) is implanted into the alveolar bone (10).

[0081] In addition, the length of the abutment contact support (141) can be processed to be shorter than the length of the abutment anti-rotation part (143), and due to this structural feature, the abutment can be easily coupled to the fixture (100) of the dental implant according to the present embodiment, while achieving a stable and strong fixing force.

[0082] The internal threaded portion (145) forms a location where an abutment screw (not shown) for fixing the abutment is fastened.

[0083] In this embodiment, the internal threaded portion (145) is positioned within the alveolar bone implant fixation portion (110). Therefore, the internal threaded portion (145) is positioned to overlap with the external threaded portion (111). The total length of the internal threaded portion (145) can be processed to be shorter than half the total length of the external threaded portion (111).

[0084] Since the external threaded portion (111) is completely implanted into the alveolar bone (10) and the abutment screw is fastened to the internal threaded portion (145) overlapping the external threaded portion (111), there is an advantage in that stable bonding of the abutment to be bonded to the fixture (100) of the dental implant according to the present embodiment can be achieved.

[0085] By this configuration, when the dental implant fixture (100) according to the present embodiment is implanted into the alveolar bone (10) as shown in FIG. 2 using a separate tool, the initial preparation for the implant procedure can be completed. At this time, it is sufficient to implant the alveolar bone implant fixing part (110) so that it can be completely inserted into the alveolar bone (10) without alveolar bone augmentation surgery.

[0086] According to the present embodiment, which operates with the structure described above, even in the case of patients with abnormal alveolar bone (10) such as those in FIGS. 1 and 2, where the bone is partially lost due to aging or a lesion, or where the bone is unusually thin or low, implants can be easily implanted into the corresponding alveolar bone (10) without alveolar bone augmentation surgery, and maintenance can be made easier, so that the success rate of implant surgery can be significantly increased compared to the past.

[0087] As such, the present invention is not limited to the described embodiments, and it will be apparent to those skilled in the art that various modifications and variations can be made without departing from the spirit and scope of the present invention. Accordingly, such modifications and variations should be considered to fall within the scope of the claims of the present invention.

[0088] The present invention can be used in dental treatment.

Claims

1. An alveolar bone implantation anchor that is implanted and fixed in an abnormal alveolar bone having a bone defect part where the bone is partially lost or relatively thin or low-formed; and A dental implant fixture characterized by including a machined cuff that is provided to be integrally connected to the above alveolar bone implant fixing part and is positioned in a bone defect area of the alveolar bone, and has one side in contact with and supported by the bone defect area, thereby increasing the implant stability of the alveolar bone implant fixing part in the alveolar bone while enabling external maintenance.

2. In paragraph 1, The above machined cuff is manufactured in a cylindrical shape of a non-screw type, A dental implant fixture characterized in that one side wall of the machined cuff is supported by contact with the bone defect to increase the implant stability of the alveolar bone implant fixing part, and the other side wall is exposed to enable external maintenance.

3. In paragraph 1, The above machined cuff is a long machined cuff that is manufactured to be relatively long. A dental implant fixture characterized in that the outer wall line of the machined cuff forms a straight line.

4. In paragraph 1, A fixture for a dental implant, characterized in that the machined cuff is provided with at least one groove (cell-like groove) formed by recessing a predetermined depth in a radial direction from the outer surface.

5. In paragraph 4, A fixture for a dental implant, characterized in that the at least one groove is a plurality of grooves arranged in a plurality along the longitudinal direction of the machined cuff.

6. In paragraph 5, A fixture for a dental implant, characterized in that the plurality of grooves have a triangular cross-section and are arranged at equal intervals along the length direction of the machined cuff.

7. In paragraph 1, The above alveolar bone implant fixation part is manufactured as a screw type in which an external screw thread is formed on the outer wall for implantation into the alveolar bone. A dental implant fixture characterized in that it is implanted in a state in which it is completely inserted into the interior of the alveolar bone excluding the bone defect and is fixed to the alveolar bone.

8. In paragraph 7, A fixture for a dental implant, characterized in that the external threaded portion is formed in a spiral shape along the outer circumference of the alveolar bone implant fixing portion, but is formed continuously without any interrupted sections.

9. In paragraph 7, A fixture for a dental implant, characterized in that an internal threaded portion is formed inside the alveolar bone fixation portion or the machined cuff to which an abutment screw for fixing an abutment is fastened.

10. In paragraph 8, A fixture for a dental implant, characterized in that the internal threaded portion is positioned within the alveolar bone implant fixation portion and overlaps the external threaded portion.

11. In paragraph 10, A fixture for a dental implant, characterized in that the total length of the internal threaded portion is processed to be shorter than half the total length of the external threaded portion.

12. In paragraph 1, A fixture for a dental implant, characterized in that it further includes an abutment contact support portion formed on the inner wall of the entrance side of the machined cuff and joined while the abutment is in contact with and supported.

13. In paragraph 12, A fixture for a dental implant, characterized in that the abutment contact support portion has a conical slope shape with a cross-sectional area that gradually decreases as it moves from the machined cuff toward the alveolar bone implantation fixation portion.

14. In paragraph 12, A fixture for a dental implant characterized in that it further includes a rotation prevention part for a tool catch that is formed on the inner wall of the machined cuff and is provided in an end region of the abutment contact support part facing the alveolar bone implant fixing part, and in which a predetermined tool is caught and rotation is prevented.

15. In paragraph 14, A fixture for a dental implant, characterized in that it further includes an abutment rotation prevention unit formed on the inner wall of the machined cuff and provided in an end region of the rotation prevention unit for tool catching, and preventing arbitrary rotation of the abutment.

16. In paragraph 15, A fixture for a dental implant, characterized in that the above abutment rotation prevention part forms an octa shape when viewed in a plane.

17. In paragraph 15, A fixture for a dental implant characterized in that it further includes a cylinder portion formed on the inner wall of the machined cuff and provided in the end region of the abutment rotation prevention portion, and processed into a circular cross-section.

18. In paragraph 15, The length of the cylinder portion is processed to be shorter than the length of the abutment rotation prevention portion and longer than the length of the tool-catching rotation prevention portion in relation to the direction in which the alveolar bone implantation fixing portion is implanted into the alveolar bone. A fixture for a dental implant, characterized in that the length of the abutment contact support portion is processed to be shorter than the length of the abutment anti-rotation portion.

19. In paragraph 1, A fixture for a dental implant, characterized in that the above alveolar bone implant fixing part forms a tapered part whose diameter becomes smaller as it goes toward the bottom.

20. In paragraph 1, A fixture for a dental implant, characterized in that at least one cutting edge portion is formed on the outer wall of the alveolar bone implant fixation portion.

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