TW201400077A - Bone implant - Google Patents

Abstract

A bone implant is presented, which comprises a body and an abutment base. The body has a connecting end, a drilling end and a plurality of engaging sections between the connecting end and the drilling end, with a depart-preventing section forms between any two adjacent engaging sections. Each engaging section has a screw with the same spiral direction on the peripheral surface of the body while the depart-preventing section has an engaging portion on the peripheral surface of the body. The largest outer diameter of the depart-preventing section is smaller than the smallest outer diameter of any engaging section from the depart-preventing section to the connecting end. The abutment base is arranged at the connecting end of the body, with the abutment base has a concave hole.

Description

Bone implant

The present invention relates to a bone implant, particularly a bone implant that has a thread and is not removed after implantation into the bone.

There are many kinds of bone implants, such as bone screws, bone nails or artificial roots of implants such as bone needles, bone nails, locking bone plates or artificial joints, etc., are common bone implants; The stability of the bond between the various bone implants and the bones is very important, and the bone implants that are firmly bonded to the bones can enhance the medical effect and efficiency desired.

Among them, some of the bone implants are not taken out after the bones are implanted. Taking the artificial roots as an example, the patent application of the Chinese People's Republic of China Public Publication No. 201121510 "Human Implants and Their Manufacturing Methods" focuses on the surface of the root implants. Material improvement; Announcement No. M338055 "Improved structure of artificial roots" patent focuses on the stability of the joint between the neck and the bone of the root implant; and the patent No. M390130 "Single-piece angle implant" focuses on the root branch Improvement of the station.

However, none of the above-mentioned conventional root implants has a structure in the threaded portion that prevents reverse sliding out, so that after the root implant is implanted into the alveolar bone, bone integration can only be achieved by the bone tissue and the root implant. After (Osseointegration), the conventional root implant can be firmly integrated into the alveolar bone. However, in the process of osseointegration, once the conventional root implant is subjected to a force opposite to the direction of the thread, it may be spun in the alveolar bone to cause slippage, even if only a slight displacement, Bone tissue from the conventional root implant The surface is loose, causing bone integration to fail. For the above reasons, conventional bone implants do have the need to improve.

The main object of the present invention is to provide a bone implant that provides resistance opposite to the direction in which the bone implant is dislodged to effectively prevent the bone implant from loosening in the bone, allowing the bone to be implanted. The object can be firmly bonded to the bone and cannot be slipped out of the detachment.

In order to achieve the foregoing objective, the technical content of the present invention includes: a bone implant comprising: a body, the two ends of the body are respectively a connecting end and a drill bit end, the body is at the connecting end and the drill bit A plurality of engaging sections are disposed between the ends, and a retaining section is disposed between any two adjacent engaging sections, and the plurality of engaging sections each have a same drilling thread on the circumferential surface of the body The retaining section is provided with a latching portion on the circumferential surface of the body, and the maximum outer diameter of the retaining section is smaller than the minimum outer diameter of each of the engaging sections between the retaining section and the connecting end; And a pedestal disposed at the connecting end of the body, wherein the supporting base is provided with a keying recess.

The present invention further provides a bone implant, comprising: a body, the two ends of the body are respectively a connecting end and a drill end, the body is provided with a plurality of meshing sections between the connecting end and the drill bit end, A retaining section is disposed between the two adjacent engaging sections, and each of the plurality of engaging sections has a same drilling thread disposed on a circumferential surface of the body, and the retaining section is in the ring of the body a peripheral portion of the retaining portion having a maximum outer diameter smaller than a minimum outer diameter of each of the engaging portions between the retaining portion and the connecting end; and a limiting head disposed on the body The connecting end is provided with a tool abutting portion.

In the bone implant of the present invention, the latching portion may be at least one anti-offset thread distributed on the circumferential surface of the body, and the anti-off-threading direction is different from the direction of rotation of the drilling thread.

The bone implant of the present invention, wherein the number of the anti-offset threads can be several.

In the bone implant of the present invention, a gap may be provided between the adjacent two anti-offset threads, and the spacer may be a blank portion without a thread or provided with a protrusion.

In the bone implant of the present invention, the latch portion may be at least one convex ring distributed on a circumferential surface of the body.

In the bone implant of the present invention, the number of the convex rings may be several.

In the bone implant of the present invention, a spacer may be disposed between the adjacent two convex rings, and the spacer may be a blank portion without a convex ring or provided with a protrusion.

The bone implant of the present invention, wherein the click portion can be a rough surface.

The bone implant of the present invention, wherein the click portion may be at least one spiral groove or ring groove distributed on a circumferential surface of the body.

In the bone implant of the present invention, the helix angle of each of the drilling threads may be the same.

The above and other objects, features, and advantages of the present invention will become more <RTIgt; A detailed description is as follows: Referring to FIG. 1 , the bone implant of the first embodiment of the present invention is a root implant comprising a body 1 and a pedestal 2 disposed on the pedestal 2 One end of the body 1.

The two ends of the body 1 are respectively a connecting end 1a and a drill end 1b. The connecting end 1a of the main body 1 is connected to the supporting base 2, and the drill end 1b is preferably arc-shaped or tapered. The drawing is described in the form of an arc-shaped drill bit end 1b. The body 1 is provided with a plurality of engaging sections 11 between the connecting end 1a and the bit end 1b, and a retaining section 12 is disposed between any two adjacent engaging sections 11, and the figure of this embodiment is The body 1 is provided with two engaging sections 11 and a retaining section 12 as an embodiment.

In this embodiment, each of the engaging sections 11 is respectively provided with a drilling thread 111 on the circumferential surface of the body 1. The drilling threads 111 on each of the engaging sections 11 have the same direction of rotation, and the helix angle is better. For the same. A valley portion 112 is formed between the pitches of the drilling threads 111. Each of the meshing sections 11 of the body 1 has a minimum outer diameter D1 at the valley portion 112; the retaining portion 12 is on the circumferential surface of the body 1. A latching portion 121 is provided, the body 1 having a maximum outer diameter D2 at the retaining section 12. The maximum outer diameter D2 should be smaller than the minimum outer diameter D1 of each of the meshing sections 11 between the retaining section 12 and the connecting end 1a so as not to affect the smoothness of locking the bones of the engaging sections 11.

In this embodiment, the latching portion 121 may be at least one anti-off thread 121a distributed on the circumferential surface of the body 1, so that the body 1 may be selected to have a reduced diameter at the retaining portion 12. The maximum outer diameter D2 of the retaining section 12 can be smaller than the meshing section between the retaining section 12 and the connecting end 1a. The minimum outer diameter D1 of 11; thus, when the root implant is locked into the bone by the respective meshing sections 11 of the body 1, the retaining section 12 does not affect the smoothness of the lock. Wherein, the rotation of the anti-off thread 121a is different from the direction of rotation of the drilling thread 111 to provide a torsion force opposite to the drilling thread 111.

Referring to FIG. 2, when the plurality of anti-dropping screws 121a are provided in the retaining section 12, the parameters such as the pitch, the helix angle, and the depth of the anti-separation thread 121a may be the same or different, or may be the same. A spacing portion 122 is disposed between the adjacent two anti-off-threads 121a. The spacer portion 122 may be a blank portion having a smooth or rough surface without a thread, or a ring or any form of protrusion. The invention is not limited.

The pedestal 2 can be integrally connected to the connecting end 1a of the body 1. The supporting base 2 is provided with a keying recess 21 for positioning and positioning of a table A (as shown in FIG. 3). A crown (not shown) is attached to the table to form a denture. However, the pedestal can have corresponding structural changes in response to different forms of the abutment, which can be understood by those having ordinary knowledge in the technical field, and is not a feature of the present invention, and therefore will not be described in detail below. It should not be limited to the form disclosed in the schema.

Referring to Fig. 3, when a dental implant treatment is performed, a hole (not shown) is formed in the gum and the alveolar bone in advance, and then the drill end 1b of the root implant is used as an implantation end. Rotating the body 1 according to the rotation direction of the drilling thread 111, so that the root implant can be gradually inserted into the gum and the alveolar bone by the drilling thread 111 of each of the engaging sections 11; Setting the maximum outer diameter D2 of the retaining section 12 to be smaller than the minimum outer diameter D1 of each of the engaging sections 11 between the retaining section 12 and the connecting end 1a, so that the retaining section 12 is locked During the process of bone implants, it will not affect each The locking section 11 has a smooth fit.

After the implantation step of the root implant, the bone tissue inside the alveolar bone will gradually form osseointegration with the root implant, and during the process of osseointegration, the bone tissue will gradually cover the root of the root implant. The defensive section 12 further increases the contact surface area of the body 1 with the alveolar bone by the structure of the anti-offset 121a or the like to enhance the effect of osseointegration. At the same time, in the process of osseointegration, not only the bone tissue of the detachment prevention section 12, which is in the reduced diameter state, can provide the resistance of the root implant to escape, and the rotation is reversed against the drilling thread 111. 121a, further providing a resistance opposite to the direction in which the root implant is dislodged; thus, ensuring that the root implant is stably positioned at a predetermined position without any displacement, and the root implant is less likely to occur in the bone tissue In the loose state, it can effectively accelerate the efficiency of osseointegration.

Referring to FIG. 4, in addition to the anti-detachment screw 121a, the latch portion 121 may be at least one convex ring 121b distributed on the circumferential surface of the body 1, so that the body 1 can also be selected. The retaining section 12 is in a reduced diameter state, such that the maximum outer diameter D2 of the retaining section 12 can be smaller than the minimum outer diameter D1 of the engaging section 11 between the retaining section 12 and the connecting end 1a; In this way, each of the retaining sections 12 can provide the opposite resistance of the root implant in the direction of removal to ensure that the root implant is stably positioned at a predetermined position without any displacement.

Further, the number of the convex rings 121b is preferably several. When the plurality of convex rings 121b are disposed in the retaining portion 12, the parameters such as the distance between the convex rings 121b and the inclination angle may be the same or different; the pattern of the embodiment is distributed in several equidistances and orthogonal to The main body 1 is represented by the same size convex ring 121b in the axial direction, but is not limited thereto. Furthermore, a space may be provided between the adjacent two convex rings 121b. The partition portion may be a blank portion having a smooth or rough surface without providing the convex ring 121b, or may be provided with a projection of any shape, which is not limited in the present invention.

In addition, the latching portion 121 of the retaining portion 12 may not be provided with a thread, a convex ring or a protrusion of any form, but may be formed by a method such as sand blasting and acid etching to form a rough surface, and The rough surface increases the surface area of contact between the body 1 and the bone to enhance the effect of osseointegration.

Referring to FIG. 5 , the latching portion 121 may also be at least one spiral groove 121 c or a ring groove distributed on the circumferential surface of the body 1 , so that the body 1 does not have to be at the retaining portion 12 . In the reduced diameter state, the maximum outer diameter D2 of the retaining section 12 can also be smaller than the minimum outer diameter D1 of the engaging section 11 between the retaining section 12 and the connecting end 1a. In this way, the root implant can also increase the contact surface area of the body 1 with the bone by the at least one spiral groove 121c or the ring groove to enhance the effect of osseointegration, and the at least one spiral groove 121c or the ring groove can be further Further, the resistance of the root implant is reversed to ensure that the root implant is stably positioned at a predetermined position without any displacement.

Referring to FIG. 6 , the bone implant of the second embodiment of the present invention is a bone nail, and the bone nail comprises a body 3 and a limiting head 4 , and the limiting head 4 is disposed at one end of the body 3 . . Wherein, when the bone nail is used to provide a temporary anchoring function, for example, to fix a bone plate, the bone nail may be made of a bioabsorbable material to be absorbed by the living body after being implanted for a period of time. There is no need to surgically remove it; when the nail is used to provide a permanent anchoring function, for example to fix an artificial joint, the nail can be made of a non-bioabsorbable material.

The two ends of the body 3 are respectively a connecting end 3a and a drill end 3b. The body 3 is provided with a plurality of engaging sections 31 between the connecting end 3a and the drill end 3b, and any two adjacent engaging sections 31 A retaining section 32 is provided between the embodiment. The figure is characterized in that the body 3 is provided with three engaging sections 31 and two retaining sections 32 as an embodiment.

In this embodiment, each of the engaging sections 31 has a drilling thread 311 distributed on the circumferential surface of the body 3, and the drilling threads 311 on each of the engaging sections 31 have the same direction of rotation, and the helix angle is better. For the same. A valley portion 312 is formed between the pitches of the drilling threads 311, and each of the engaging sections 31 of the body 3 has a minimum outer diameter D3 at the valley portion 312; the retaining portion 32 is on the circumferential surface of the body 3. A latching portion 321 is provided, the body 3 having a maximum outer diameter D4 at the retaining section 32. The maximum outer diameter D2 should be smaller than the minimum outer diameter D3 of each of the meshing sections 31 between the retaining section 32 and the connecting end 3a so as not to affect the smoothness of locking the bones of the engaging sections 31.

The latching portion 321 of the embodiment can be the same as the latching portion 121 of the first embodiment, and can be selected as at least one anti-dropping screw 321a, a convex ring, a rough surface, and a spiral groove distributed on the circumferential surface of the body 3. Or the ring groove, the rotation direction of the anti-off thread 321a and the spiral groove is different from the rotation direction of the drilling thread 311. For other related structures, reference may be made to the description of the first embodiment, which will not be described in detail. Wherein, when the latching portion 321 is a thread preventing portion 321a, a convex ring or a rough surface, the body 3 can be selected to have a reduced diameter at the retaining portion 32, and when the latching portion 321 is a spiral groove or When the ring groove is formed, the body 3 does not need to be in a reduced diameter state at the retaining portion 32. Thus, the maximum outer diameter D2 of the retaining portion 32 can be made smaller than the retaining portion 32 to the connection. Each meshing section between the ends 3a The minimum outer diameter D3 of 31, so that the nail is locked into the bone by the respective engaging sections 31 of the body 3, the retaining section 32 does not affect the smoothness of the lock.

The limiting head 4 can be integrally connected to the connecting end 3a of the body 3. The limiting head 4 is provided with a tool abutting portion 41 for abutting and positioning by a tool (not shown), and the tool is driven by the tool. The head 4 is rotated in the direction of rotation of the drilling thread 311 to lock the body 3 into the bone. However, the limit head 4 can have a corresponding structural change in response to different forms of the locked object (for example, a bone plate), which is known to those of ordinary skill in the art and is not a feature of the present invention. Therefore, it will not be repeated in the following text, nor should it be limited to the form disclosed in the drawings.

For example, as shown in FIG. 7 , the bone plate 5 is fixed to the bone surface by using the bone nail. The body 3 of the bone nail passes through the corresponding locking hole 51 of the bone plate 5 , and the body 3 is used. The drill bit end 3b is an implant end, and the body 3 is rotated by a tool, so that the bone nail can be gradually penetrated into the bone by the drilling thread 311 of each of the meshing sections 31, and finally the bone nail is finally The limiting head 4 abuts against the surface of the bone plate 5, and the bone nail can no longer continue to be drilled into the bone, thereby limiting the depth of bonding of the nail to the bone. The retaining section 32 is provided by setting the maximum outer diameter D4 of the retaining section 32 to be smaller than the minimum outer diameter D3 of each of the engaging sections 31 between the retaining section 32 and the connecting end 3a. In the process of drilling the lock, the locking smoothness of each of the engaging sections 31 is not affected.

After the implantation step of the bone nail is completed, the bone tissue inside the bone will gradually form osseointegration with the bone nail, and during the process of osseointegration, the bone tissue will gradually cover the circumferential surface of the bone nail, and each The retaining section 32 further increases the contact surface area of the body 3 with the bone by the structure of the latching portion 321 Improve the effect of bone integration. At the same time, in the process of osseointegration, not only the bone tissue of the anti-detachment section 32 but also the co-rotational force of each of the drilling threads 311 can be interrupted, and even the resistance opposite to the direction in which the nail is released can be provided; The bone nail is firmly positioned at the preset position without any displacement, and the bone nail is not loosened in the bone tissue, so the efficiency of osseointegration can be effectively accelerated.

In summary, the bone implant of the present invention can improve the effect of osseointegration by providing the anti-detachment section between two adjacent meshing sections, and can provide a direction of detachment from the bone implant. The opposite resistance is to effectively avoid the loosening of the bone implant in the bone, so that the bone implant can be firmly integrated into the bone and cannot be reversely slid out, which has the medical effect and efficiency to be improved. efficacy.

While the invention has been described in connection with the preferred embodiments described above, it is not intended to limit the scope of the invention. The technical scope of the invention is protected, and therefore the scope of the invention is defined by the scope of the appended claims.

1‧‧‧ Ontology

1a‧‧‧Connected end

1b‧‧‧Drill end

11‧‧‧Meshing section

111‧‧‧Drilling thread

112‧‧‧ Valley

12‧‧‧Protection section

121‧‧‧Card Department

121a‧‧‧Anti-thread removal

121b‧‧‧ convex ring

121c‧‧‧ spiral groove

122‧‧‧Interval

2‧‧‧ pedestal

21‧‧‧bonding recess

3‧‧‧ Ontology

3a‧‧‧Connected end

3b‧‧‧Drill end

31‧‧‧Meshing section

311‧‧‧Drilling thread

312‧‧‧ Valley

32‧‧‧Protection section

321‧‧‧Card Department

321a‧‧‧Anti-thread removal

4‧‧‧Limited head

41‧‧‧Tools Abutment

5‧‧‧ bone plate

51‧‧‧Keyhole

D1‧‧‧Minimum outer diameter

D2‧‧‧Maximum outer diameter

D3‧‧‧Minimum outer diameter

D4‧‧‧Maximum outer diameter

A‧‧‧ stand

Fig. 1 is a schematic view showing the structure of a first embodiment of the present invention (1).

Fig. 2 is a schematic view showing the structure of the first embodiment of the present invention (2).

Figure 3 is a schematic view showing the implementation of the first embodiment of the present invention.

Figure 4 is a schematic view showing the structure of the first embodiment of the present invention (3).

Figure 5 is a schematic view showing the structure of the first embodiment of the present invention (4).

Figure 6 is a schematic view showing the structure of a second embodiment of the present invention.

Figure 7 is a schematic view showing the implementation of the second embodiment of the present invention.

1‧‧‧ Ontology

1a‧‧‧Connected end

1b‧‧‧Drill end

11‧‧‧Meshing section

111‧‧‧Drilling thread

112‧‧‧ Valley

12‧‧‧Protection section

121‧‧‧Card Department

121a‧‧‧Anti-thread removal

2‧‧‧ pedestal

21‧‧‧bonding recess

D1‧‧‧Minimum outer diameter

D2‧‧‧Maximum outer diameter

Claims (11)

A bone implant comprises: a body, the two ends of which are respectively a connecting end and a drill end, the body is provided with a plurality of meshing sections between the connecting end and the bit end, and any two adjacent A retaining section is disposed between the engaging sections, and each of the plurality of engaging sections has a same drilling thread disposed on a circumferential surface of the body, and the retaining section is provided on a circumferential surface of the body. a latching portion, the maximum outer diameter of the retaining section is smaller than a minimum outer diameter of each of the engaging sections between the retaining section and the connecting end; and a base provided at a connecting end of the body, the branch A key recess is provided in the pedestal. A bone implant comprises: a body, the two ends of which are respectively a connecting end and a drill end, the body is provided with a plurality of meshing sections between the connecting end and the bit end, and any two adjacent A retaining section is disposed between the engaging sections, and each of the plurality of engaging sections has a same drilling thread disposed on a circumferential surface of the body, and the retaining section is provided on a circumferential surface of the body. a latching portion, the maximum outer diameter of the retaining section is smaller than a minimum outer diameter of each of the engaging sections between the retaining section and the connecting end; and a limiting head is disposed at the connecting end of the body, The limit head is provided with a tool abutment. The bone implant of claim 1 or 2, wherein the latch portion is at least one anti-off thread distributed on a circumferential surface of the body, the rotation of the anti-off thread and the drilling The direction of the thread is different. The bone implant of claim 3, wherein the number of the anti-offset threads is several. The bone implant of claim 4, wherein a gap is provided between the adjacent two anti-offset threads, the spacer being a blank portion without a thread or provided with a protrusion. The bone implant of claim 1 or 2, wherein the click portion is at least one convex ring distributed on a circumferential surface of the body. The bone implant of claim 6, wherein the number of the convex rings is several. The bone implant of claim 7, wherein a spacer is disposed between the adjacent two convex rings, and the spacer is a blank portion without a convex ring or is provided with a protrusion. The bone implant of claim 1 or 2, wherein the click portion is a rough surface. The bone implant of claim 1 or 2, wherein the click portion is at least one spiral groove or ring groove distributed on a circumferential surface of the body. The bone implant of claim 1 or 2, wherein each of the drilling threads has the same helix angle.