The application claims the benefit of Taiwan Patent Application No. 104141379, filed on Dec. 9, 2015, at the Taiwan Intellectual Property Office, the disclosure of which is incorporated herein in its entirety by reference.
The present invention relates to a bone implant, and more particularly to a bone implant with growth guidance.
The appearance of any bone implant is considered in bone repair. In addition, the duration of the bone implant is valued more and more. Currently, manufacturing bone implants requires reconstructing the appearance of the bone via a CT image, manufacturing the model of the bone implant via computer files in advance, and casting the bone cement in the model to obtain a bone implant applicable for bone repair (TW I469767 and TW I324509). Although this method can achieve the purpose of repairing the appearance quickly, the repair strength and the function of the bone implant still can not satisfy some requirements of clinical use. Due to current progress in the process technology, the most common structure of bone implant is a multi-hole titanium mesh sheet bent to repair and fix the broken bone (U.S. Ser. No. 10/517,843 and U.S. Ser. No. 11/289,591). Compared with bone cement, this structure provides stronger supporting strength. However, the process of bending may result in a limitation to the fixation, and the multi-hole titanium mesh sheet can not provide enough fixation and allow the patient to wear a denture due to the large area to be repaired in a mandible (TW I496557). Implants of imitation bone are used in spine treatment, the method thereof usually uses a regular interbody fusion cage, the hollow shape thereof is used to fix the bone, and the hollow shape design can reduce the problem of stress concentration (TW M273326). If the holes in the interbody fusion cage are too large, the effect of osseointegration will be worse, and the process of manufacturing the interbody fusion cage is complex. In addition, the multi-hole implant for supporting the spine (TW 201521670) is one implant design disposed with different sized holes inside and outside. Although this design can achieve the purpose of obtaining a similar bone structure and reducing stress while supporting the spine, this design can not provide holes for fixation, and can only be fixed via additional fixing devices, and the shape thereof can not conform to the anatomical shape of the bone.
In order to overcome the drawbacks in the prior art, a bone implant is disclosed. The particular design in the present invention not only solves the problems described above, but is also easy to implement. Thus, the present invention has utility for industry.
In accordance with one aspect of the present invention, a bone implant to be disposed between a first bone section and a second bone section is disclosed. The bone implant includes a body structure, a plurality of through-hole structures and an extended channel structure. The body structure has a first end surface to be connected to the first bone section and a second end surface to be connected to the second bone section. The plurality of through-hole structures are disposed in the body structure, pass through the first end surface and the second end surface and have a through-hole axis. The extended channel structure is disposed in the body structure, wherein the extended channel structure enables a new bone section to grow along a direction other than the through-hole axis between the first bone section and the second bone section.
In accordance with another aspect of the present invention, a bone implant for implantation onto a to-be-repaired bone section is disclosed, wherein the to-be-repaired bone section has an anatomical direction. The bone implant includes a body structure, a plurality of through-hole structures and an extended channel structure. The body structure has an end surface for connecting the to-be-repaired bone section. The plurality of through-hole structures are disposed in the body structure and have an anatomical direction axis conforming to the anatomical direction. The extended channel structure is disposed in the body structure, and enables a new bone section to grow along a first direction other than that of the anatomical direction axis.
In accordance with a further aspect of the present invention, a bone implant for connecting to a to-be-repaired bone section is disclosed, wherein the to-be-repaired bone section has an anatomical direction. The bone implant includes a body structure connected to the to-be-repaired bone section, and a channel structure disposed in the body structure, wherein the channel structure is one of a two-dimensional and three-dimensional grid structures, and enables a new bone to grow to fill therein.
The objectives and advantages of the present invention will become more readily apparent to those ordinarily skilled in the art after reviewing the following detailed descriptions and accompanying drawings, in which:
The present invention will now be described more specifically with reference to the following embodiments. It is to be noted that the following descriptions of preferred embodiments of this invention are presented herein for the purposes of illustration and description only; they are not intended to be exhaustive or to be limited to the precise form disclosed.
The present invention has the following advantages: (1) a design that guides bone growth and enables bone cells to grow into the channels conforming to the anatomical direction to enhance the stability of the repaired bone; (2) the holes disposed on the surface of the bone implant can be applied to wearing a denture so that the bite function can be restored immediately after repairing the broken mandible, and the holes can also implement the fixation right away; (3) the hole structure design in the bone implant can reduce stress concentration and increase the space for bone growth.
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1. A bone implant to be disposed between a first bone section and a second bone section includes a body structure, a plurality of through-hole structures and an extended channel structure. The body structure has a first end surface to be connected to the first bone section and a second end surface to be connected to the second bone section. The plurality of through-hole structures is disposed in the body structure, passes through the first end surface and the second end surface and has a through-hole axis. The extended channel structure is disposed in the body structure, wherein the extended channel structure enables a new bone section to grow along a direction other than the through-hole axis between the first bone section and the second bone section.
2. In the bone implant according to Embodiment 1, each of the plurality of through-hole structures and the extended channel structure has a hole size ranging between 200 μm and 750 μm.
3. In the bone implant according to Embodiments 1-2, each of the plurality of through-hole structures and the extended channel structure has a shape selected from a group consisting of circular, rectangular and irregular shapes.
4. In the bone implant according to Embodiments 1-3, the plurality of through-hole structures intersects the extended channel structure at fixed intervals.
5. In the bone implant according to Embodiments 1-4, the plurality of through-hole structures and the extended channel structure construct a 3-D hole observable in the directions of up and down, front and rear, and left and right to form a three-dimensional grid structure.
6. In the bone implant according to Embodiments 1-5, any two dimensions of the three-dimensional grid structure has therebetween an angle being selected from a group consisting of less than 90°, equal to 90° and more than 90°.
7. In the bone implant according to Embodiments 1-6, the body structure has a surface disposed with holes having one of the same size and different sizes.
8. In the bone implant according to Embodiments 1-7, each of the holes has an inner wall having threads disposed thereon.
9. In the bone implant according to Embodiments 1-8, the holes are used to wear a denture.
10. In the bone implant according to Embodiments 1-9, the holes are used to fix the bone implant via one selected from a group consisting of a bone screw, a bony plate and the combination thereof.
11. In the bone implant according to Embodiments 1-10, the bone implant is made of a material being one selected from a group consisting of titanium, titanium alloy, stainless steel and ceramic.
12. A bone implant for implantation to a to-be-repaired bone section includes a body structure, a plurality of through-hole structures and an extended channel structure, wherein the to-be-repaired bone section has an anatomical direction. The body structure has an end surface for connecting the to-be-repaired bone section. The plurality of through-hole structures is disposed in the body structure and has an anatomical direction axis conforming to the anatomical direction. The extended channel structure is disposed in the body structure, and enables a new bone section to grow along a first direction other than that of the anatomical direction axis.
13. In the bone implant according to Embodiment 12, the bone implant further includes a second extended channel structure disposed in the body structure and enables a new bone section to grow along a second direction other than those of the anatomical direction axis and the first direction.
14. In the bone implant according to Embodiments 12-13, the extended channel structure has a first extended channel axis, the second extended channel structure has a second extended channel axis, and any two of the anatomical direction axis, the first extended channel axis and the second extended channel axis are not parallel to each other.
15. In the bone implant according to Embodiments 12-14, the new bone section grows in the plurality of through-hole structures, the extended channel structure and the second extended channel structure.
16. A bone implant for connecting to a to-be-repaired bone section includes a body structure and a channel structure, wherein the to-be-repaired bone section has an anatomical direction. The body structure is connected to the to-be-repaired bone section. The channel structure is disposed in the body structure, is one of a two-dimensional and three-dimensional grid structures, and enables a new bone to grow to fill therein.
17. In the bone implant according to Embodiment 16, the channel structure has a plurality of channels, and only a portion of the plurality of channels extends along the anatomical direction.
18. In the bone implant according to Embodiments 16-17, each of the plurality of channels has a section diameter ranging between 200 μm and 750 μm.
19. In the bone implant according to Embodiments 16-18, any two channels intersect to form an angle being one selected from a group consisting of less than 90°, equal to 90° and more than 90°.
20. In the bone implant according to Embodiments 16-19, the body structure has a surface disposed with a plurality of holes to fix the bone implant via one selected from a group consisting of a bone screw, a bony plate and the combination thereof.
Based on the above, the present invention effectively solves the problems and drawbacks in the prior art, and thus it meets the demands of the industry and is industrially valuable.
While the invention has been described in terms of what is presently considered to be the most practical and preferred embodiments, it is to be understood that the invention needs not be limited to the disclosed embodiments. On the contrary, it is intended to cover various modifications and similar arrangements included within the spirit and scope of the appended claims which are to be accorded with the broadest interpretation so as to encompass all such modifications and similar structures.
Number | Date | Country | Kind |
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104141379 | Dec 2015 | TW | national |