TW201300072A - Bone fixing device - Google Patents

Abstract

This invention relates to a bone fixing device, comprising a first bone plate, a second bone plate, and a combination unit connecting the first bone plate and the second bone plate. The first bone plate comprises a main body and an extension section extended outward from the main body. The second bone plate comprises a main body and a disposition section extended outward from the main body. The combination unit comprises a first combination part formed at the extension section of the first bone plate and a second combination part formed at the disposition section of the second bone plate for using to engage with the first combination section. The combination unit enables the first bone plate and the second bone plate to be mutually engaged with different angles, so that the first bone plate and the second bone plate can be stably maintained at the engagement angle without the problem of relative swinging.

Description

Bone fixation device

The present invention relates to a fixation device, and more particularly to a bone fixation device for immobilizing fractured bone.

In general, when the bone is broken, the bone nail and the bone plate are mostly used to fix the fractured bone. On the one hand, the fractured bone is not displaced due to the movement, and on the other hand, the fractured bone can be accelerated and healed. Referring to FIG. 1 , it is a US Patent No. 7,090,676 B2 "Adjustable Bone Plate" patent, comprising a first plate body 11, a second plate body 12 rotatably disposed on the first plate body 11, and a Locking the locking bolts 13 of the first plate body 11 and the second plate body 12, the first plate body 11 has five openings 111 respectively for locking a plurality of bone nails 14, and a first one having a hemispherical recess The second plate body 12 has four openings 121 for locking the bone nails 14 respectively, and a second joint portion 122 that cooperates with the first joint portion 112. The locking bolt 13 The first joint portion 112 and the second joint portion 122 are locked to each other, and are used for fixing the pivotal angle of the first plate body 11 and the second plate body 12. In use, the first plate body 11 and the second plate body 12 are firstly engaged with the position and angle of the fractured bone (not shown), and then the first plate body is fixed by the locking bolt 13 . 11 and the angle between the second plate body 12, and finally the first plate body 11 and the second plate body 12 are respectively locked to the fractured bone by the bone nails 14, thereby strengthening the stability of the fractured bone. Therefore, the first plate body 11 and the second plate body 12 can be connected at different angles according to the shape of the fractured bone by the first joint portion 112 and the second joint portion 122, and are suitable for various types of bone fractures and fractures. The adjustable bone plate 1 has high versatility.

However, since the adjustable bone plate 1 fixes the angles of the first plate body 11 and the second plate body 12 by the locking bolts 13, if the locking bolts 13 are not locked or loose due to limb movement, Then, the first plate body 11 and the second plate body 12 can swing relative to each other, and the function of fixing the bone is lost.

Accordingly, it is an object of the present invention to provide a bone fixation device that can be joined at different angles and that is less prone to loosening.

Therefore, the bone fixation device of the present invention comprises a first bone plate, a second bone plate connected to the first bone plate, and a coupling unit connecting the first bone plate and the second bone plate.

The first bone plate includes a body and an extending portion extending outward from the body, and the body has at least one fixing hole formed therein.

The second bone plate includes a body and a setting portion extending outward from the body, and the body has at least one fixing hole formed therein.

The bonding unit includes a first joint formed on the extension of the first bone plate, and a second portion formed on the second bone plate and can be used for engaging with the first joint The bonding unit enables the first bone plate and the second bone plate to be engaged at different angles.

The effect of the present invention is that the first bone plate and the second bone plate can be coupled with the second joint portion by the first joint portion of the joint unit, so that the first bone plate and the second bone plate are different. The angle is connected, so that the first bone plate and the second bone plate do not have the problem of relative swing, and the angle of the snap is firmly maintained.

The above and other technical contents, features and advantages of the present invention will be apparent from the following detailed description of the preferred embodiments of the invention.

Referring to FIG. 2 and FIG. 3, a first preferred embodiment of the bone fixation device of the present invention comprises a first bone plate 2, a second bone plate 3 connected to the first bone plate 2, and a connection. A bonding unit 4 of the bone plate 2 and the second bone plate 3, and a plurality of fixing members 5 respectively locked to the first bone plate 2 and the second bone plate 3 (see Fig. 5).

The first bone plate 2 includes a body 21 and an extending portion 22 extending outward from the body 21. The body 21 has two fixing holes 23, and preferably, a bottom surface of each fixing hole 23. A plurality of protrusions 221 are formed in the periphery, and the extension portion 22 has a through hole 221. In the embodiment, the fixing holes 23 are in a single hole shape, and referring to FIG. 5, each of the fixing holes 23 has a A threaded portion 231 for the fastening member 5 and a groove portion 232 connected to the threaded portion 231 and adjacent to the top surface of the body 21, the groove portion 232 having an aperture larger than the diameter of the threaded portion 231. It should be noted that, in this embodiment, the convex portion 24 is in the form of a plurality of convex ridges 241, but may be in the form of an annular ridge 242 as shown in FIG.

2 and 3, the second bone plate 3 includes a body 31, and a setting portion 32 extending outward from the body 31. The body 31 has two fixing holes 33, preferably, a bottom surface. A protrusion 34 is formed on a periphery of each fixing hole 33, and the setting section 32 has a protrusion 321 which cooperates with the through hole 221 of the extension 22, and a hole communicating with the hole 221 and formed with an internal thread. In the present embodiment, the fixing holes 33 are in the form of a double hole. Referring to FIG. 5 , each of the fixing holes 33 has a threaded portion 331 for the fixing member 5 to be screwed, and A groove portion 332 connected to the threaded portion 331 and adjacent to the top surface of the body 31, the hole portion 332 having an aperture larger than the diameter of the thread portion 331. In the present embodiment, the convex portion 34 is in the form of a plurality of convex ridges 341, but may also be in the form of an annular ridge 342 as shown in FIG.

It should be noted that the fixing hole 23 of the first bone plate 2 may also be a double hole or a single hole or a double hole, and the fixing hole 33 of the second bone plate 3 is also It may be a single hole, or a single hole or a double hole, not limited to the aspect shown in the figure, and the fixing hole of the first bone plate 2 and the second bone plate 3 23 The number is not limited to two.

Referring to FIG. 2 and FIG. 3, the bonding unit 4 includes a first joint portion 41 formed on the extended portion 22 of the first bone plate 2, and a setting portion 32 formed on the second bone plate 3 and can be used. The second joint portion 42 is engaged with the first joint portion 41. In this embodiment, the first joint portion 41 of the joint unit 4 is formed on the inner circumference of the through hole 221 of the extension portion 22, and has a plurality of continuous grooves, and the second joint portion 42 of the joint unit 4 is Most of the bumps are formed on the mounting portion 32 and are respectively matched with the recesses. Preferably, the plurality of bumps of the second joint portion 42 are formed on the periphery of the protruding post 321 , in particular, the There may be only one bump of the second joint portion 42. In addition, the first joint portion 41 may also be a bump pattern, and the second joint portion 42 is a groove pattern, which is not shown in the figure. limit.

Referring to FIG. 5 and FIG. 6 , the fastening members 5 can be selected as locking bone screws or compression type bone screws. In FIG. 5 , the fastening members 5 are compression type nails and have a function for locking. a first screw portion 52 of the broken bone 7 (see FIG. 7), and the fixing member 5 shown in FIG. 6 is a locking bone screw. At this time, each of the fastening members 5 further has a The second screw portion 51 is locked to the threaded portions 231 and 331 of the corresponding fixing holes 23 and 33 and has a larger diameter than the first screw portion 52 and has a smaller pitch than the first screw portion 52.

Referring to FIG. 6 and FIG. 7, the bone fixation device is for fixing the broken bone 7, wherein the broken bone 7 has a main body 71, and a breaking portion 72 spaced apart from the main body 71. A bone plate 2 and a second bone plate 3 are connected to each other by the joint unit 4, since the first joint portion 41 is a groove and the second joint portion 42 is a bump (see FIG. 2). Therefore, the first bone plate 2 and the second bone plate 3 can be engaged at different angles according to the shape of the broken bone 7 (refer to FIG. 7 and FIG. 8), and there is no relative rotation after the engagement, and then The locking hole 322 of the second bone plate 3 is locked by a locking screw 6 to fix the extension 22 of the first bone plate 2 and the setting portion 32 of the second bone plate 3 to strengthen the first The combination of the bone plate 2 and the second bone plate 3, it should be noted that the locking screw 6 may be replaced by a fixing member 5, and the fixing member 5 is locked into the second bone plate 3 and broken. The bone 7 together strengthens the bonding of the first bone plate 2, the second bone plate 3 and the broken bone 7, and then the first screwing portion 52 of the plurality of fastening members 5 can be locked into the broken bone 7 phase. Corresponding body 71 or fracture segment 72, and second Portion 51 are disposed into corresponding locking holes 23, 33 secured to the threaded portion 231, 331, whereby the body 7 of the fractured bone segments 71 and 72 will not fracture relative displacement.

Since the fixing hole 33 of the second bone plate 3 is a double hole, a plurality of locking positions are provided, which can be matched with the type and size of the different broken bones 7, and at the same time, the fixing holes 23, 33 are formed. The groove portions 232, 332, after the fastening member 5 is locked, are flush with the surface of the first bone plate 2 and the second bone plate 3, and the fastening member 5 is compressed when the compression type bone screw is compressed. Function, or lock function for locking bone screws.

In addition, since the bottom surfaces of the main body 21, 31 of the first bone plate 2 and the second bone plate 3 are formed with the convex portions 24, 34 at the periphery of each of the fixing holes 23, 33, the first bone plate 2 is When the second bone plate 3 is locked on the broken bone 7, it is not completely pressed against the broken bone 7, so that blood circulation is not affected, and the broken bone 7 can be more effectively restored.

Referring to FIG. 9, a second preferred embodiment of the bone fixation device of the present invention is substantially the same as the first preferred embodiment, and the difference is that the first joint portion 41 of the coupling unit 4 is The ring is disposed adjacent to the periphery of the through hole 221. Preferably, the first joint portion 41 is a pin hole 41 which is disposed at a plurality of intervals in the through hole 221 of the first bone plate 2, and the second joint portion of the joint unit 4 The 42-series is disposed opposite to the first joint portion 41. Preferably, the second joint portion 42 is a plurality of lugs 42 that are respectively pinned to the pin holes 41.

As described above, the bone fixation device of the present invention has the following effects when used:

1. Highly versatile and not easy to loosen:

Since the first bone plate 2 and the second bone plate 3 can be engaged at different angles, and there is no problem of relative rotation, the broken bone 7 can be applied to various angles, and the utility model has high versatility, and at the same time The first joint portion 41 and the second joint portion 42 are engaged with each other, and there is no fear of looseness.

2. Suitable for a variety of fastening parts 5 lock:

Since each of the fixing holes 23 and 33 has the threaded portions 231 and 331 which are screwed by the fixing member 5 and the groove portions 232 and 332 which are connected to the threaded portions 231 and 331 , it can be applied to a compression type bone screw or Locking bone screws provide compression or locking functions, respectively, so different fasteners 5 can be used as needed.

3. Strengthen the bonding of the first bone plate 2 and the second bone plate 3:

The locking portion 6 is locked into the locking hole 322 of the second bone plate 3 to fix the extension 22 of the first bone plate 2 and the setting portion 32 of the second bone plate 3 to strengthen the first The bond between the bone plate 2 and the second bone plate 3.

In summary, the first bone plate 2 and the second bone plate 3 can be connected at different angles and the card can be connected by the first joint portion 41 and the second joint portion 42 of the joint unit 4 of the present invention. The first bone plate 2 and the second bone plate 3 are generally used for versatility, and the locking hole 6 is locked into the locking hole 322 of the second bone plate 3 to make the first bone. The plate 2 is fixed to the second bone plate 3 to strengthen the bond between the first bone plate 2 and the second bone plate 3, so that the object of the present invention can be achieved.

The above is only the preferred embodiment of the present invention, and the scope of the invention is not limited thereto, that is, the simple equivalent changes and modifications made by the scope of the invention and the description of the invention are All remain within the scope of the invention patent.

2. . . First bone plate

twenty one. . . Ontology

twenty two. . . Extension

221. . . perforation

twenty three. . . Fixed hole

231. . . Thread part

232. . . Groove

twenty four. . . Raised portion

241. . . Bulge

242. . . Annular ridge

3. . . Second bone plate

31. . . Ontology

32. . . Set segment

321. . . Tab

322. . . Locking hole

33. . . Fixed hole

331. . . Thread part

332. . . Groove

34. . . Raised portion

341. . . Bulge

342. . . Annular ridge

4. . . Binding unit

41. . . First joint

42. . . Second joint

5. . . Fastener

51. . . Second screw

52. . . First screw

6. . . Locking screw

7. . . Broken bone

71. . . main body

72. . . Break section

Figure 1 is a perspective view showing the US Patent No. US7090676 B2 "Adjustable Bone Plate" patent;

Figure 2 is a perspective view showing a first preferred embodiment of the bone fixation device of the present invention;

Figure 3 is another perspective view showing the convex portion of the first preferred embodiment as a convex shape;

Figure 4 is another perspective view showing the convex portion of the first preferred embodiment as an annular ridge;

Figure 5 is a cross-sectional view showing a state in which a plurality of fastening members of the first preferred embodiment are combined with a first bone plate and a second bone plate;

Figure 6 is a cross-sectional view showing another aspect of the fixing member in the first preferred embodiment;

Figure 7 is a top view showing the first bone plate of the first preferred embodiment being engaged with the second bone plate at an angle;

Figure 8 is a top view showing the first bone plate of the first preferred embodiment being engaged with the second bone plate at another angle; and

Figure 9 is a perspective view showing a second preferred embodiment of the bone fixation device of the present invention.

2. . . First bone plate

twenty one. . . Ontology

twenty two. . . Extension

221. . . perforation

twenty three. . . Fixed hole

3. . . Second bone plate

31. . . Ontology

32. . . Set segment

321. . . Tab

322. . . Locking hole

33. . . Fixed hole

4. . . Binding unit

41. . . First joint

42. . . Second joint

Claims (11)

A bone fixation device comprising: a first bone plate, comprising a body, and an extension extending outward from the body, the body having at least one fixing hole formed therein; a second bone plate comprising a body And a mounting section extending outward from the body, the body is formed with at least one fixing hole; and a coupling unit includes a first joint formed on the extension of the first bone plate, and a The second bone plate can be used for the second joint portion of the second bone plate, and the joint unit can engage the first bone plate and the second bone plate at different angles. . The bone fixation device of claim 1, wherein the first joint portion of the joint unit is a pin hole disposed at a plurality of intervals in the extension of the first bone plate, and the second unit of the joint unit The joint portion is a plurality of lugs that are respectively pinned to the pin holes. The bone fixation device of claim 1, wherein the extension of the first bone plate has a perforation, and the setting portion of the second bone plate has a protrusion corresponding to the perforation of the extension The first joint portion of the joint unit is a plurality of grooves formed on the inner circumference of the perforation, and the second joint portion of the joint unit is formed on the periphery of the boss and respectively matched with the grooves. Bumps. The bone fixation device of claim 1, wherein the extension of the first bone plate has a perforation, and the setting portion of the second bone plate has a protrusion corresponding to the perforation of the extension The first joint portion of the joint unit is a plurality of continuous grooves formed on the inner circumference of the perforation, and the second joint portion of the joint unit is formed on the circumference of the protrusion and is adjacent to the groove Fit the bumps. The bone fixation device of claim 3, wherein the second bone plate further comprises a locking hole communicating with the perforation and having an internal thread, and the bone fixation device further comprises A screw threaded on the locking hole and fixed to the first bone plate and the second bone plate. The bone fixation device according to claim 1, wherein each of the fixing holes has a threaded portion, and a groove portion connected to the threaded portion and adjacent to the top surface of the body, the aperture of the groove portion is Greater than the aperture of the threaded portion. The bone fixing device according to claim 6, further comprising a plurality of fixing members respectively locked to the fixing holes, wherein each fixing member has a first screwing portion. The bone fixation device of claim 7, wherein each of the fastening members further has a second screw portion having a larger diameter than the first screw portion and a smaller pitch than the first screw portion. The bone fixation device according to the first aspect of the invention, wherein the bottom surface of the first bone plate and the second bone plate is formed with a convex portion at a periphery of each of the fixing holes. The bone fixation device according to claim 9, wherein each of the convex portions is a plurality of convex particles formed on a periphery of the corresponding fixing hole. The bone fixation device according to claim 9, wherein each of the convex portions is an annular ridge formed on a circumference of the corresponding fixing hole.