TWI689281B - Bone implant - Google Patents

Abstract

A bone implant includes at least one spiral and at least one pillar. The spiral surrounds an accommodating space. The pillar is disposed in the accommodating space and connected to the spiral. The pillar has at least one notch.

Description

Bone implant

The invention relates to a bone implant, in particular to a flexible bone implant.

When human bones, tendons, ligaments, and other human tissues are damaged to a certain extent, doctors sometimes judge that surgical operations should be performed on the damaged parts. The content of surgery is usually to move the damaged human tissue to the position before the damage, and use sutures and bone nails and other bone implants to fix the human tissue. Humans have to repair damaged parts with the ability of self-repair. Alternatively, sutures and bone implants are used to fix other artificial tissues in the body to assist or replace damaged human tissues.

Most of the damaged human tissues mentioned above are human tissues in need of activity, such as shoulders, knees and other joints and nearby tissues. However, current bone implants usually have a high degree of rigidity, which limits the mobility of human tissue with bone implants. People with such bone implants in the body are faced with the problem of decreased mobility, and may also exceed the mobility limit without paying attention, resulting in damage to the bone implant or its locked bone.

In view of the above problems, the present invention proposes a bone implant, by improving the bending flexibility of the bone implant, to slow down the limited mobility of the organism with the bone implant in the body and the bone implant Prolapse from the bone.

One embodiment of the present invention provides a bone implant including at least one spiral body and at least one cylinder. The spiral body surrounds an accommodating space. The cylinder is arranged in the accommodating space and connected to the spiral body. The cylinder has at least one gap.

According to the bone implant of one embodiment of the present invention, the strength of the bone implant is maintained by the cylinder, and the cylinder has a gap to improve the bending flexibility of the bone implant. By improving the bending flexibility of the bone implant, the situation in which the mobility of the organism with the bone implant in the body is restricted and the bone implant comes out of the bone is slowed down.

The above description of the content of the present invention and the following description of the embodiments are used to demonstrate and explain the spirit and principle of the present invention, and provide a further explanation of the scope of the patent application of the present invention.

The following describes in detail the detailed features and advantages of the embodiments of the present invention in the embodiments. The content is sufficient for anyone with ordinary knowledge in the art to understand and implement the technical contents of the embodiments of the present invention, and according to the disclosure of this specification The contents, patent application scope and drawings can be easily understood by anyone with ordinary knowledge in the art to understand the purpose and advantages of the present invention. The following examples further illustrate the views of the present invention in detail, but do not limit the scope of the present invention in any way.

In the so-called schematic diagram in this specification, the size, ratio, angle, etc. may be exaggerated due to the description, but it is not intended to limit the present invention. Various changes can be made without departing from the gist of the present invention. The top, bottom, back, and front orientations mentioned in the description of the embodiments and drawings are for illustration, not for limiting the present invention.

Please refer to FIGS. 1, 2 and 3, FIG. 1 is a schematic perspective view of a bone implant according to an embodiment of the present invention, FIG. 2 is a schematic cross-sectional side view of the bone implant of FIG. 1, FIG. 3 A schematic side view of the bone implant of FIG. 1 is shown.

In this embodiment, the bone implant 1 may include a spiral body 11 and a cylinder 12. The spiral body 11 surrounds a receiving space S. The cylinder 12 is disposed in the accommodating space S and connected to the spiral body 11. The cylinder 12 has at least one gap.

In detail, the spiral body 11 has an end portion 11a and an end portion 11b corresponding to each other. In use, the end portion 11a can be locked into the locking target before the end portion 11b. The spiral body 11 spirally surrounds the accommodation space S with the central axis CA of the accommodation space S as a center. In this embodiment, the number of turns of the spiral body 11 around the accommodating space S may be 6 turns, but not limited to this. In other embodiments, the number of turns of the spiral body 11 around the accommodating space S may be 2 to 6 turns as required. The spiral body 11 has an outer diameter D, a length L, and a tooth height H. The outer diameter D is a radial dimension of the outermost side of the entire spiral body 11 passing through the central axis CA of the accommodating space S. The length L is the dimension of the spiral body 11 along the axial direction of the central axis CA of the accommodating space S. The tooth height H is the radial dimension of the partial section of the spiral body 11 along the central axis CA of the accommodating space S. In this embodiment, the length L may be approximately 19.45 mm, the outer diameter D may be approximately 6 mm, and the tooth height H may be approximately 1.2 mm, but not limited to this. In other embodiments, the ratio of the outer diameter D to the length L may be 1 to 1/15. In this embodiment, the spiral body 11 surrounds in a right-hand manner, but it is not limited thereto. In other embodiments, the spiral body 11 may be surrounded by a left-handed rotation.

The distance between adjacent peaks of the spiral body 11 in the axial direction of the central axis CA is the pitch P. In the present embodiment, the spiral body 11 can be offset by about one pitch P every time it surrounds the accommodation space S.

The cylinder 12 is provided at a position located in the accommodating space S. The cylinder 12 is integrally connected to the spiral body 11 inseparably. The arrangement of the gap can narrow or cut off the cylinder 12. In this embodiment, the column 12 may have a narrowing-shaped notch 12a and a truncated-type notch 12b in order from the end 11b to the end 11a. The narrow-shaped notch 12a narrows the cylinder 12, and the truncated-type notch 12b disconnects the cylinder 12 discontinuously.

In this embodiment, the middle point of the notch 12a and the middle point of the notch 12b can be separated by about two pitches P, but not limited to this. In other embodiments, the pillar 12 may have at least one of a narrowed notch 12a and a truncated notch 12b. The pillar 12 may have a notch 12a and/or a notch 12b every 1 to 4 pitches P. In this embodiment, the notch 12a and the notch 12b of the column 12 may be closer to the end 11b and farther from the end 11a, but not limited to this. In other embodiments, the configuration and number of the narrow-shaped notches 12a and the truncated-type notches 12b may vary depending on the bending flexibility requirements of the bone implant 1. The bone implant 1 can improve the bending flexibility of the bone implant 1 because the cylinder 12 has the notch 12a and/or the notch 12b.

In this embodiment, the accommodating space S has a minimum width W1 between the cylinder 12 and the inner side of the spiral body 11 through the central axis CA in the radial direction, which may be about 2.1 mm, but not limited to this. In other embodiments, the minimum width W1 may be greater than 0.9 mm, which may be adjusted according to the size of the tool used in the bone implant 1.

In this embodiment, the bone implant 1 may further include a hanging wire portion 13. The thread-hanging portion 13 is integrally connected to the spiral body 11 and the column body 12 inseparably. The thread-hanging portion 13 is located inside the spiral body 11 and at the end of the cylinder 12. The thread-hanging portion 13 may be closer to the end portion 11a and farther from the end portion 11b. The thread hanging portion 13 has a groove 13a near the end portion 11a. The groove 13a is recessed away from the end 11b of the spiral body 11.

The bone implant 1 may be formed by three-dimensional printing, or may be formed by three-dimensional printing and sintering, or may be formed by laser engraving.

The thread hanging portion 13 is suitable for fixing the suture at the implantation site. When the bone implant 1 is used, the suture can be passed through the accommodating space S and straddling the groove 13 a of the thread hanging portion 13, and the tool used by the bone implant 1 can be placed into the accommodating space S. The tool can clamp the cylinder 12 and avoid the suture. When the tool is rotated with the central axis CA as the axis, the tool can abut and drive the cylinder 12 to rotate with the central axis CA as the axis, and the cylinder 12 drives the spiral body 11 to rotate with the central axis CA as the axis. With this, the bone implant 1 can be locked into a target object such as bones along with the screw thread of the spiral body 11.

Please refer to FIGS. 4, 5, 6 and 7. FIG. 4 is a schematic perspective view of a bone implant according to another embodiment of the present invention. FIG. 5 is a side cross-sectional view of the bone implant of FIG. 4 Schematic diagram, FIG. 6 is a schematic cross-sectional side view of the bone implant of FIG. 4 from another perspective, and FIG. 7 is a schematic side view of the bone implant of FIG. 4.

In this embodiment, the bone implant 2 may include two spiral bodies 211, 212, two cylinders 221, 222, and a hanging wire portion 23.

The spiral body 211 has an end portion 211a and an end portion 211b corresponding to each other. In use, the end portion 211a can be locked into the locking target before the end portion 211b. The spiral body 211 spirally surrounds the accommodation space S with the central axis CA of the accommodation space S as a center. In this embodiment, the number of turns of the spiral body 211 around the accommodating space S may be 3 turns, but not limited to this. In other embodiments, the number of turns of the spiral body 211 around the accommodating space S may be 2 to 6 turns as required. In this embodiment, the length L of the spiral body 211 may be approximately 19.45 mm, the outer diameter D of the spiral body 211 may be approximately 6 mm, and the tooth height H of the spiral body 211 may be approximately 1.2 mm, but not limited thereto. In other embodiments, the ratio of the outer diameter D of the spiral body 211 to the length L is 1 to 1/15. In this embodiment, the spiral body 211 is surrounded by a right-handed manner, but it is not limited thereto. In other embodiments, the spiral body may be surrounded by a left-handed rotation.

The geometric characteristics of the spiral body 212 and the spiral body 211 are similar. The spiral body 212 has an end portion 212a and an end portion 212b corresponding to each other. When in use, the end 212a can be locked into the locking target before the end 212b. In this embodiment, it can be regarded that the end 211a of the spiral body 211 and the end 212a of the spiral body 212 respectively start from different positions and surround the accommodating space S in the same direction. In detail, the spiral body 211 and the spiral body 212 are 180° from each other The angular differences are misaligned and do not intersect, and the central axis CA of the accommodating space S is used as the center, and the accommodating space S is spirally surrounded by three turns. In this embodiment, the number of spiral bodies 211 and 212 is two, but it is not limited thereto. In other embodiments, the number of spiral bodies 211 and 212 may be two to four.

The distance between the adjacent peaks of the spiral body 211 and the spiral body 212 along the axial direction of the central axis CA is the pitch P. In the present embodiment, the spiral body 211 can be offset by about two pitches P for each turn around the accommodation space S, and the spiral body 212 can be offset by about two pitches P for every turn around the accommodation space S.

The cylinder 221 and the cylinder 222 surround the central axis CA of the accommodating space S. In this embodiment, the number of the pillars 221 and 222 is two, but it is not limited thereto.

The column 221 is provided at a position in the accommodating space S. The cylinder 221 is integrally connected to the spiral bodies 211 and 212 inseparably. The pillar 221 may have a narrow-shaped notch 221a and a truncated-type notch 221b in order from the ends 211b and 212b to the ends 211a and 212a.

In this embodiment, the middle point of the notch 221a and the middle point of the notch 221b may be separated by about two pitches P, but not limited to this. In other embodiments, the pillar 221 may have at least one of a narrow-type notch 221a and a truncated-type notch 221b. The pillar 221 may have a notch 221a and/or a notch 221b every 1 to 4 pitches P.

The column 222 is provided at a position in the accommodating space S. The cylinder 222 is integrally connected to the spiral bodies 211 and 212 inseparably. The pillar 222 may have two truncated notches 222a and 222b in order from the ends 211b and 212b to the ends 211a and 212a.

In this embodiment, the middle point of the notch 222a and the middle point of the notch 222b may be separated by about two pitches P, but not limited to this. In other embodiments, the pillar 222 may have at least one of a narrowed gap and a truncated gap. The pillar 222 may have a narrowed gap and/or a truncated gap every 1 to 4 pitches P.

In this embodiment, the notches 221a, 221b of the pillar 221 and the notch 222a of the pillar 222 may be closer to the ends 211b, 212b and farther away from the ends 211a, 212a, and the notch 222b of the pillar 222 may be closer to the end 211a , 212a and farther away from the ends 211b, 212b, but not limited to this. In other embodiments, the configuration and number of notches may vary depending on the bending flexibility requirements of the bone implant 2. The bone implant 2 can improve the bending flexibility of the bone implant 2 because the cylinder 221 and/or the cylinder 222 have a narrow-shaped gap and/or a truncated gap.

In this embodiment, the accommodating space S has a minimum width W2 between the cylinder 221 and the cylinder 222 in the radial direction passing through the central axis CA, which may be about 2.1 mm, but not limited to this. In other embodiments, the minimum width W2 may be greater than 0.9 mm, which may be adjusted according to the size of the tool used in the bone implant 1.

The thread-hanging portion 23 is integrally and inseparably connected to the spiral body 211, the spiral body 212, the cylinder 221 and the cylinder 222. The thread-hanging portion 23 is located inside the spiral bodies 211 and 212 and at the ends of the cylinder 221 and the cylinder 222. The thread-hanging portion 23 may be closer to the ends 211a, 212a and farther from the ends 211b, 212b. The thread-hanging portion 23 has a groove 23a near the ends 211a, 212a. The groove 23a is recessed away from the end 211b of the spiral body 211 and the end 212b of the spiral body 212.

The bone implant 2 may be formed by three-dimensional printing, or may be formed by three-dimensional printing and sintering, or may be formed by laser engraving.

When the bone implant 2 is used, a suture can be passed through the accommodating space S and straddling the groove 23 a of the thread-hanging portion 23, and the tool used by the bone implant 2 can be placed in the accommodating space S. The tool can clamp the cylinders 221 and 222 and avoid the sutures. When rotating the tool with the central axis CA as the axis, the tool can abut and drive the cylinders 221 and 222 to rotate with the central axis CA as the axis, and the cylinders 221 and 222 drive the spiral bodies 211 and 212 to rotate with the central axis CA as the axis . As a result, the bone implant 2 can be locked into a target object such as bones along with the screw threads of the spiral bodies 211 and 212.

Please refer to FIG. 8, which is a schematic perspective view of a bone implant according to another embodiment of the present invention. The bone implant 3 of this embodiment is similar to the bone implant 2 shown in FIG. 4.

It is to be noted that the spiral body 311, 312 of the bone implant 3 has a plurality of holes 31a. After the bone implant 3 is locked into the bone and other locked targets, the osteoblasts can grow bone into the hole 31a of the bone implant 3, thereby increasing the strength of the fit between the bone and the bone implant 3. In addition, when the material of the bone implant 3 is degradable, the hole 31a of the bone implant 3 can increase the contact area between the locking target and the bone implant 3, thereby increasing the bone graft The degradability of Into Article 3.

The following is based on the bone implant 3 shown in FIG. 8, the number of cylinders, the number of gaps in the cylinder, the number of gaps between gaps, the number of spiral bodies, the outer diameter of the spiral body, the length of the spiral body, the spiral body In the case of constant tooth height and other parameters, compare the maximum displacement of the bone implant in the axial direction of the central axis CA when the number of turns of each spiral body spirally surrounding the accommodation space S is different. The greater the maximum displacement, the lower the rigidity of the bone implant and the better the bending flexibility. The results of the simulation test are shown in Table 1.

"Table 1"

As can be seen from Table 1, based on the bone implant 3 shown in FIG. 8, the maximum axial displacement of the bone implant when the number of turns of each spiral body spirally surrounding the accommodation space S is 3.5 turns and 3.75 turns More than other turns, and has good bending flexibility.

Please refer to FIG. 9, FIG. 10 and FIG. 11, FIG. 9 is a schematic perspective view of a bone implant according to another embodiment of the present invention, and FIG. 10 is a schematic cross-sectional side view of the bone implant of FIG. 9. 11 is a schematic cross-sectional side view of the bone implant of FIG. 9 from another perspective. The bone implant 4 of this embodiment is similar to the bone implant 3 shown in FIG. 8.

It should be noted that, in this embodiment, the two spiral bodies 411 and 412 of the bone implant 4 are respectively centered on the central axis CA of the accommodation space S, and each of them spirally surrounds the accommodation space S 3.5 times.

In this embodiment, the cylinder 421 integrally and inseparably connected to the spiral bodies 411, 412 may have one narrow-shaped notch 421a and two truncated-type notches in order from the end 411b, 412b to the end 411a, 412a 421b and 421c, the midpoint of the gap 421a and the midpoint of the gap 421b may be separated by about two pitches P, and the midpoint of the gap 421b and the midpoint of the gap 421c may be apart by about two pitches P, but not limited to this.

In this embodiment, the cylinder 422 integrally and inseparably connected to the spiral bodies 411, 412 may have two truncated notches 422a, 422b and a narrowed type in order from the end 411b, 412b to the end 411a, 412a The notch 422c, the middle point of the notch 422a and the middle point of the notch 422b may be separated by about two pitches P, and the middle point of the notch 422b and the middle point of the notch 422c may be separated by about two pitches P, but not limited to this.

In this embodiment, the notches 421a, 421b of the pillar 421 and the notch 422a of the pillar 422 may be closer to the ends 411b, 412b and farther away from the ends 411a, 412a, and the notch 422b of the pillar 422 may be located in the spirals 411, 412 In the vicinity of the midpoint, the notch 421c of the pillar 421 and the notch 422c of the pillar 422 may be closer to the ends 411a, 412a and farther from the ends 411b, 412b, but not limited thereto. In other embodiments, the configuration and number of notches may vary depending on the bending flexibility requirements of the bone implant 4. The bone implant 4 can increase the bending flexibility of the bone implant 4 because the cylinder 421 and/or the cylinder 422 has a narrow-shaped gap and/or a truncated gap.

Please refer to FIGS. 12, 13 and 14. FIG. 12 is a schematic perspective view of a bone implant according to another embodiment of the present invention. FIG. 13 is a schematic cross-sectional side view of the bone implant of FIG. 12. 14 is a schematic cross-sectional side view of the bone implant of FIG. 12 from another perspective. The bone implant 5 of this embodiment is similar to the bone implant 3 shown in FIG. 8.

It should be noted that, in the present embodiment, the two spiral bodies 511 and 512 of the bone implant 5 are respectively centered around the central axis CA of the accommodation space S, and each of them spirally surrounds the accommodation space S for 4 turns.

In this embodiment, the cylinder 521 integrally and inseparably connected to the spiral bodies 511 and 512 may sequentially have a narrow-shaped notch 521a and two truncated-type notches from the end 511b, 512b to the end 511a, 512a 521b and 521c, the midpoint of the notch 521a and the midpoint of the notch 521b may be separated by about two pitches P, and the midpoint of the notch 521b and the midpoint of the notch 521c may be separated by about two pitches P, but not limited to this.

In this embodiment, the cylinder 522 integrally connected to the spiral bodies 511 and 512 can have three truncated cutouts 522a, 522b and 522c from the end 511b and 512b to the end 511a and 512a in sequence. The cutout 522a The middle point and the middle point of the notch 522b may be separated by about two pitches P, and the middle point of the notch 522b and the middle point of the notch 522c may be separated by about two pitches P, but not limited to this.

In this embodiment, the notches 521a, 521b of the pillar 521 and the notches 522a, 522b of the pillar 522 may be closer to the ends 511b, 512b and farther away from the ends 511a, 512a, the notch 521c of the pillar 521 and the pillar 522 The notch 522c may be closer to the ends 511a, 512a and farther away from the ends 511b, 512b, but not limited to this. In other embodiments, the configuration and number of notches may vary depending on the bending flexibility requirements of the bone implant 5. The bone implant 5 can improve the bending flexibility of the bone implant 5 because the cylinder 521 and/or the cylinder 522 has a narrow-shaped gap and/or a truncated gap.

15, 16 and 17, FIG. 15 is a schematic perspective view of a bone implant according to another embodiment of the present invention, and FIG. 16 is a schematic cross-sectional side view of the bone implant of FIG. 15. 17 is a schematic cross-sectional side view of the bone implant of FIG. 15 from another perspective. The bone implant 6 of this embodiment is similar to the bone implant 3 shown in FIG. 8.

It should be noted that, in this embodiment, the two spiral bodies 611 and 612 of the bone implant 6 respectively use the central axis CA of the accommodation space S as a center, and spirally surround the accommodation space S in a left-handed manner. But not limited to this.

In this embodiment, the cylinder 621 integrally and inseparably connected to the spiral bodies 611, 612 may have a narrowing-type notch 621a and a truncating-type notch 621b in order from the end 611b, 612b to the end 611a, 612a And a narrowed notch 621c, the middle point of the notch 621a and the middle point of the notch 621b can be separated by about 2 pitches P, the middle point of the notch 621b and the middle point of the notch 621c can be separated by about 2 pitches P, but not This is limited.

In this embodiment, the cylinder 622 integrally and inseparably connected to the spiral bodies 611, 612 may have two truncated notches 622a, 622b in sequence from the end 611b, 612b to the ends 611a, 612a. The point and the gap 622b can be separated by about two pitches P, but not limited to this.

In this embodiment, the notches 621a, 621b of the pillar 621 and the notch 622a of the pillar 622 may be closer to the ends 611b, 612b and farther away from the ends 611a, 612a, the notch 621c of the pillar 621, and the notch of the pillar 622 622b may be closer to the ends 611a, 612a and farther from the ends 611b, 612b, but not limited thereto. In other embodiments, the configuration and number of notches may vary depending on the bending flexibility requirements of the bone implant 6. The bone implant 6 can improve the bending flexibility of the bone implant 6 because the cylinder 621 and/or the cylinder 622 has a narrow-shaped gap and/or a truncated gap.

In this embodiment, the bone implant 6 may further include walls 641, 642. The wall body 641 and the spiral body 611 surround the accommodating space S. The wall body 641 is integrally connected to the spiral body 611 integrally, and extends from the spiral body 611 along the axial direction of the central axis CA of the accommodating space S. The wall body 642 and the spiral body 612 surround the accommodation space S. The wall body 642 is integrally connected to the spiral body 612 integrally, and extends from the spiral body 612 along the axial direction of the central axis CA of the accommodation space S. When the bone implant 6 is locked into a bone or other locked target, the walls 641 and 642 of the bone implant 6 can increase the contact area between the locked target and the bone implant 6.

In this embodiment, the walls 641 and 642 have no holes, but it is not limited thereto. In other embodiments, the walls 641 and 642 may also have multiple holes. When the bone implant 6 is locked into a target such as a bone, the osteoblast can grow bone into the hole of the bone implant 6 and increase the fitting strength between the bone and the bone implant 6. In addition, when the material of the bone implant 6 is a degradable material, the holes of the walls 641, 642 can increase the contact area between the locking target and the bone implant 6, thereby increasing the bone implant 6 Degradability.

Please refer to FIG. 18, FIG. 19 and FIG. 20. FIG. 18 is a schematic perspective view of a bone implant according to another embodiment of the present invention. FIG. 19 is a schematic cross-sectional side view of the bone implant of FIG. 20 is a schematic cross-sectional side view of the bone implant of FIG. 18 from another perspective. The bone implant 7 of this embodiment is similar to the bone implant 3 shown in FIG. 8.

It should be noted that, in this embodiment, the bone implant 7 may include three spiral bodies 711, 712, 713. In this embodiment, it can be considered that the end 711 a of the spiral body 711, the end 712 a of the spiral body 712 and the end 713 a of the spiral body 713 respectively start from different positions and surround the accommodating space S in the same direction. In detail, the spiral body 711, the spiral body 712, and the spiral body 713 are misaligned with each other at an angle difference of 120°, and together have the central axis CA of the accommodating space S as the center, and each of the three spirally surrounds the accommodating space S .

The distance between the adjacent peaks of the spiral body 711, the spiral body 712, and the spiral body 713 along the axial direction of the central axis CA is the pitch P. In this embodiment, the spiral body 711 can be offset by about 3 pitches P per revolution around the accommodation space S, the spiral body 712 can be offset by about 3 pitches P per revolution around the accommodation space S, and the spiral body 713 surrounds the accommodation space S can be shifted by about 3 pitches P per revolution.

In this embodiment, the cylinder 721 integrally and inseparably connected to the spiral bodies 711, 712, 713 may sequentially have a narrowed notch 721a from the ends 711b, 712b, 713b to the ends 711a, 712a, 713a, A truncated notch 721b and a narrowed notch 721c, the middle point of the notch 721a and the middle point of the notch 721b can be separated by about 3 pitches P, the middle point of the notch 721b and the middle point of the notch 721c can be separated by about 3 P, but not limited to this.

In this embodiment, the cylinder 722 integrally and inseparably connected to the spiral bodies 711, 712, 713 may have two truncated notches 722a in order from the ends 711b, 712b, 713b to the ends 711a, 712a, 713a, 722b, the middle point of the notch 722a and the middle point of the notch 722b may be separated by about 3 pitches P, but not limited to this.

In this embodiment, the notches 721a, 721b of the pillar 721 and the notch 722a of the pillar 722 may be closer to the ends 711b, 712b, 713b and farther away from the ends 711a, 712a, 713a, the notch 721c of the pillar 721 and the pillar The notch 722b of the body 722 may be closer to the ends 711a, 712a, 713a and farther from the ends 711b, 712b, 713b, but not limited thereto. In other embodiments, the configuration and number of notches can vary depending on the need for bending flexibility of the bone implant 7. The bone implant 7 can improve the bending flexibility of the bone implant 7 because the cylinder 721 and/or the cylinder 722 have a narrow-shaped gap and/or a truncated gap.

The following is based on the bone implant 7 shown in FIG. 18, the number of cylinders, the number of gaps in the cylinder, the number of gaps between gaps, the number of spiral bodies, the outer diameter of the spiral body, the length of the spiral body, the spiral body In the case of constant tooth height and other parameters, compare the maximum displacement of the bone implant in the axial direction of the central axis CA when the number of turns of each spiral body spirally surrounding the accommodation space S is different. The greater the maximum displacement, the lower the rigidity of the bone implant and the better the bending flexibility. The results of the simulation test are shown in Table 2.

"Table 2"

It can be seen from Table 2 that, based on the bone implant 7 shown in FIG. 18, when the number of turns of each spiral body spirally surrounding the accommodation space S is 3, 3.25 and 3.5 turns, the axial direction of the bone implant The maximum displacement is more than other turns, and it has good bending flexibility.

21, 22 and 23, FIG. 21 is a schematic perspective view of a bone implant according to another embodiment of the present invention, and FIG. 22 is a schematic cross-sectional side view of the bone implant of FIG. 21. 23 is a schematic cross-sectional side view of the bone implant of FIG. 21 from another perspective. The bone implant 8 of this embodiment is similar to the bone implant 3 shown in FIG. 8.

It should be noted that, in this embodiment, the bone implant 8 may include four spiral bodies 811, 812, 813, and 814. In this embodiment, it can be regarded that the end 811a of the spiral body 811, the end 812a of the spiral body 812, the end 813a of the spiral body 813 and the end 814a of the spiral body 814 respectively start from different positions and surround the receiving space S in the same direction . In detail, the spiral body 811, the spiral body 812, the spiral body 813 and the spiral body 814 are misaligned with each other at an angle difference of 90°, and together have the central axis CA of the accommodating space S as the center, and each of the three spirally surrounds the volume Set space S.

The distance between the adjacent peaks of the spiral body 811, spiral body 812, spiral body 813, and spiral body 814 along the axial direction of the central axis CA is the pitch P. In this embodiment, the spiral body 811 can be offset by about 4 pitches P per revolution around the accommodation space S, the spiral body 812 can be offset by about 4 pitches P per revolution around the accommodation space S, and the spiral body 813 surrounds the accommodation space S can be shifted by about 4 pitches P per turn, and the spiral body 814 can be shifted by about 4 pitches P per turn around the accommodation space S.

In this embodiment, the cylinder 821 integrally and inseparably connected to the spiral bodies 811, 812, 813, and 814 may have a narrow order from the ends 811b, 812b, 813b, and 814b to the ends 811a, 812a, 813a, and 814a. The notch 821a and the truncated notch 821b may have a gap of about 4 pitches P between the middle point of the notch 821a and the middle point of the notch 821b, but not limited to this.

In this embodiment, the cylinder 822 integrally and inseparably connected to the spiral bodies 811, 812, 813, and 814 may have a narrow sequence from the ends 811b, 812b, 813b, and 814b to the ends 811a, 812a, 813a, and 814a. The notch 822a and the truncated notch 822b may have a gap between the middle point of the notch 822a and the middle point of the notch 822b of about 4 pitches P, but not limited to this.

In this embodiment, the notches 821a, 821b of the cylinder 821 and the notch 822a of the cylinder 822 may be closer to the ends 811b, 812b, 813b, 814b and farther away from the ends 811a, 812a, 813a, 814a. The notch 822b may be closer to the ends 811a, 812a, 813a, 814a and farther from the ends 811b, 812b, 813b, 814b, but not limited thereto. In other embodiments, the configuration and number of notches may vary depending on the need for bending flexibility of the bone implant 8. The bone implant 8 can increase the bending flexibility of the bone implant 8 because the cylinder 821 and/or the cylinder 822 has a narrow-shaped gap and/or a truncated gap.

The following is based on the bone implant 8 shown in FIG. 21, the number of cylinders, the number of gaps in the cylinder, the number of gaps between gaps, the number of spiral bodies, the outer diameter of the spiral body, the length of the spiral body, the spiral body In the case of constant tooth height and other parameters, compare the maximum displacement of the bone implant in the axial direction of the central axis CA when the number of turns of each spiral body spirally surrounding the accommodation space S is different. The greater the maximum displacement, the lower the rigidity of the bone implant and the better the bending flexibility. The results of the simulation test are shown in Table 3.

"table 3"

It can be seen from Table 3 that, based on the bone implant 8 shown in FIG. 21, when the number of turns of each spiral body spirally surrounding the accommodation space S is 2 to 3 turns, the maximum axial displacement of the bone implant There is a gradual increasing trend, and it has good bending flexibility.

Please refer to FIGS. 24 and 25. FIG. 24 is a schematic side view of a bone implant according to another embodiment of the present invention, and FIG. 25 is a schematic side view of the bone implant of FIG. 24.

In this embodiment, the bone implant 9 may include two spiral bodies 911, 912, two cylinders 921, 922, and a hanging wire portion 93.

In this embodiment, the spiral body 911 and the spiral body 912 are misaligned at an angle difference of 180° and do not intersect, and the central axis CA of the accommodating space S is commonly used as the center, and each of the three spirally surrounds the accommodating space S , But not limited to this. In other embodiments, the number of spiral bodies and/or the number of turns surrounded by the spiral, etc. may also be other numbers.

In this embodiment, although the number of the pillars 921 and 922 is two, it is not limited to this, and may be other numbers.

In this embodiment, the cylinder 921 integrally and inseparably connected to the spiral bodies 911, 912 may have a narrowing-type notch 921a and a truncating-type notch 921b in order from the end 911b, 912b to the end 911a, 912a , The midpoint of the gap 921a and the midpoint of the gap 921b can be separated by about 2.75 pitches P, but not limited to this.

In this embodiment, the cylinder 922 integrally and inseparably connected to the spiral bodies 911, 912 may have two truncated notches 922a, 922b in sequence from the ends 911b, 912b to the ends 911a, 912a. The point and the gap 922b can be separated by about 2.75 pitches P, but not limited to this.

In this embodiment, the notch 921a of the column 921 and the notch 922a of the column 922 may be closer to the ends 911b, 912b and farther away from the ends 911a, 912a. The notch 921b of the column 921 and the notch 922b of the column 922 may be Closer to the ends 911a, 912a and farther from the ends 911b, 912b, but not limited thereto. In other embodiments, the configuration and number of notches may vary depending on the bending flexibility requirements of the bone implant 9. The bone implant 9 can improve the bending flexibility of the bone implant 9 because the cylinder 921 and/or the cylinder 922 has a narrow-shaped gap and/or a truncated gap.

The hanging portion 93 is detachably provided at the end 911a of the spiral body 911 and the end 912a of the spiral body 912. The thread hanging portion 93 includes an outer peripheral portion 931 and a baffle 932. The shape of the outer peripheral portion 931 may be a flat cone, and may have a cylindrical through hole 931a. The bottom surface of the outer peripheral portion 931 having a larger area may face the spiral bodies 911 and 912. The blocking piece 932 may be provided in the through hole 931a and integrally connected to the outer peripheral portion 931 inseparably. The shutter 932 has a groove 93a. The groove 93a is recessed away from the spiral bodies 911 and 912.

When the bone implant 9 is used, the suture LN can pass through the through hole 931a of the hanging portion 93 and span the groove 93a of the blocking piece 932. The remaining sutures LN can penetrate into the spiral bodies 911, 912 from the end portions 911a, 912a, and pass out of the spiral bodies 911, 912 from the end portions 911b, 912b through the accommodating space S.

A locking hole can be opened for the target such as bones. The thread hanging portion 93 is inserted into the locking hole, and the end portion 911 a of the spiral body 911 and the end portion 912 a of the spiral body 912 abut against the thread hanging portion 93. The tool used for the bone implant 9 is placed in the accommodation space S. The tool can clamp the cylinders 921, 922 and avoid the suture LN. When the tool is rotated with the central axis CA as the axis, the tool can abut and drive the cylinders 921, 922 to rotate with the central axis CA as the axis, and the cylinders 921, 922 drive the spiral bodies 911, 912 to rotate with the central axis CA as the axis . Thereby, the spiral bodies 911 and 912 and the cylinders 921 and 922 can be locked into the locking target along with the threads of the spiral bodies 911 and 912. The thread-hanging portion 93 can be pushed into the locking target by the spiral bodies 911 and 912 and the cylinders 921 and 922. Thereby, the bone implant 9 can be locked into the locked target as a whole. When the tool, the spiral bodies 911, 912 and the cylinders 921, 922 rotate, the thread hanging portion 93 may not rotate. Therefore, the suture LN straddling the thread-hanging portion 93 may not rotate, and twisting may not occur.

In summary, the bone implant according to an embodiment of the present invention maintains the strength of the bone implant by the cylinder, and the cylinder has a gap to improve the bending flexibility of the bone implant. By improving the bending flexibility of the bone implant, the situation in which the mobility of the organism with the bone implant in the body is restricted and the bone implant comes out of the bone is slowed down. The thread hanging part can be separated from the spiral body, so that the suture will not rotate with the spiral body when hanging on the thread hanging part, and the situation of the suture strand can be avoided.

Although the present invention is disclosed as the foregoing embodiments, it is not intended to limit the present invention. Without departing from the spirit and scope of the present invention, all modifications and retouching are within the scope of patent protection of the present invention. For the protection scope defined by the present invention, please refer to the attached patent application scope.

1, 2, 3, 4, 5, 6, 7, 8, 9: bone implants 11, 211, 212, 311, 312, 411, 412, 511, 512, 611: spiral body 612, 711, 712, 713, 811, 812, 813, 814, 911, 912: Spiral 11a, 11b, 211a, 211b, 212a, 212b, 411a: end 411b, 412a, 412b, 511a, 511b, 512a, 512b: end 611a, 611b, 612a, 612b, 711a, 711b, 712a: end 712b, 713a, 713b, 811a, 811b, 812a, 812b: end 813a, 813b, 814a, 814b, 911a, 911b, 912a, 912b: end 12, 221, 222, 421, 422, 521, 522: cylinder 621, 622, 721, 722, 821, 822, 921, 922: cylinder 12a, 12b, 221a, 221b, 222a, 222b, 421a: notch 421b, 421c, 422a, 422b, 422c, 521a, 521b: notch 521c, 522a, 522b, 522c, 621a, 621b, 621c: notch 622a, 622b, 721a, 721b, 721c, 722a, 722b: notch 821a, 821b, 822a, 822b, 921a, 921b, 922a, 922b: notch 13, 23, 93: hanging line department 13a, 23a, 93a: groove 31a: Hole 641, 642: Wall 931: outer periphery 931a: through hole 932: baffle CA: Central axis D: outer diameter H: high tooth L: length LN: suture P: pitch S: accommodating space W1, W2: minimum width

FIG. 1 is a schematic perspective view of a bone implant according to an embodiment of the invention. FIG. 2 is a schematic side cross-sectional view of the bone implant of FIG. 1. FIG. 3 is a schematic side view of the bone implant of FIG. 1. 4 is a schematic perspective view of a bone implant according to another embodiment of the invention. FIG. 5 is a schematic side cross-sectional view of the bone implant of FIG. 4. 6 is a schematic cross-sectional side view of the bone implant of FIG. 4 from another perspective. 7 is a schematic side view of the bone implant of FIG. 4. 8 is a schematic perspective view of a bone implant according to another embodiment of the invention. 9 is a schematic perspective view of a bone implant according to another embodiment of the invention. FIG. 10 is a schematic side sectional view of the bone implant of FIG. 9. 11 is a schematic cross-sectional side view of the bone implant of FIG. 9 from another perspective. 12 is a schematic perspective view of a bone implant according to another embodiment of the invention. 13 is a schematic cross-sectional side view of the bone implant of FIG. 14 is a schematic cross-sectional side view of the bone implant of FIG. 12 from another perspective. 15 is a schematic perspective view of a bone implant according to another embodiment of the invention. 16 is a schematic cross-sectional side view of the bone implant of FIG. 15. 17 is a schematic cross-sectional side view of the bone implant of FIG. 15 from another perspective. 18 is a schematic perspective view of a bone implant according to another embodiment of the invention. FIG. 19 is a schematic side cross-sectional view of the bone implant of FIG. 18. 20 is a schematic cross-sectional side view of the bone implant of FIG. 18 from another perspective. 21 is a schematic perspective view of a bone implant according to another embodiment of the invention. 22 is a schematic side cross-sectional view of the bone implant of FIG. 21. FIG. 23 is a schematic cross-sectional side view of the bone implant of FIG. 21 from another perspective. 24 is a schematic side view of a bone implant according to another embodiment of the invention. FIG. 25 is a schematic side cross-sectional view of the bone implant of FIG. 24. FIG.

1: bone implant

11: Spiral body

11a, 11b: end

12: cylinder

12a, 12b: notch

13: Hanging Department

13a: groove

CA: Central axis

S: accommodating space

Claims (15)

A bone implant includes: at least one spiral body surrounding an accommodation space, the number of the at least one spiral body is plural, the spiral bodies are misaligned and do not intersect each other, and the spiral bodies use a central axis of the accommodation space as Around the center; and at least one cylinder, disposed in the accommodating space and connected to the at least one spiral body, the at least one cylinder has at least one notch. The bone implant according to claim 1, wherein the at least one cylinder is integrally and inseparably connected to the at least one spiral body. The bone implant of claim 1, wherein the gap narrows or truncates the at least one cylinder. The bone implant according to claim 1, further comprising a hanging thread part integrally and inseparably disposed on at least one of the at least one cylinder and the at least one spiral body. The bone implant according to claim 1, further comprising a hanging wire portion, which is detachably provided at one end of the at least one spiral body. The bone implant according to claim 1, further comprising a hanging thread portion disposed on the at least one spiral body, the hanging thread portion having a groove recessed away from an end of the at least one spiral body. The bone implant according to claim 1, wherein the number of the spiral bodies is two to four. The bone implant according to claim 1, wherein the number of turns of the at least one spiral body around the accommodating space is 2 to 6 turns. The bone implant according to claim 1, wherein the number of the at least one cylinder is plural, and the cylinders surround a central axis of the accommodating space. The bone implant of claim 1, wherein the at least one spiral body has a plurality of holes. The bone implant according to claim 1, further comprising at least one wall body, and the at least one spiral body surrounding the accommodating space, the at least one wall body is integrally and inseparably connected to the at least one spiral body, and from the at least one A spiral body extends along the axial direction of a central axis of the accommodating space. The bone implant according to claim 11, wherein the at least one wall body has a plurality of holes. The bone implant according to claim 1, wherein the at least one spiral body has an outer diameter and a length along an axial direction of a central axis of the accommodating space, and a ratio of the outer diameter to the length is 1 to 1 /15. The bone implant according to claim 1, wherein the receiving space has a minimum width in a radial direction through a central axis of the receiving space, and the minimum width is greater than 0.9 mm. The bone implant according to claim 1, wherein the at least one spiral body has a spacing, and the at least one cylinder has the at least one gap every 1 to 4 of the spacing.

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