TW201318598A - Fractured bone fixing device - Google Patents

Abstract

A fractured bone fixing device comprises a bone screw having a coupling section, a side plate, a plurality of fixing screws, and a connection rod. The side plate comprises an abutment section that abuts against a side of the fractured bone and a joint section that extends upward from one end of the abutment section in an inclined manner to receive the coupling section of the bone screw therethrough. The abutment section comprises a plurality of fixing holes formed therein to juxtapose longitudinally in a spaced manner. The fixing screws respectively extend through the fixing holes and are fastened to the fractured bone. The connection rod is detachably connected between the abutment section of the side plate and the bone screw. Through the arrangement that the connection rod supports, in an inclined direction, the screw bone, the positioning of the screw bone is enhanced, and deformation and deflection caused by the cantilever arm arrangement can be eliminated.

Description

Fracture bone fixation device

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

With the aging of the population, osteoporosis, and widespread lifestyle activities and eating patterns that cause obesity, the population of joint injuries continues to rise year by year.

Especially for patients with osteoporosis, the body bone tissue is subjected to vertical stress of the body and oblique torque of the femoral trochanter, which is easy to cause fracture of the femoral neck. Excessive stress is also likely to cause bone resorption.

At present, in the medical clinical treatment of femoral neck fractures, most of them use sliding hip screw (DHS) surgery, sliding hip joint screw is an internal fixation implant with two-way compression As shown in Figures 1 and 2, the main constituent elements include a lag screw 11, a side plate 12, and a majority of compression screws 13, lag screws. A front end portion 12 is formed with a threaded portion 111, and a side plate 12 has a slanted joint portion 121 and a fixed portion 122 which is directly connected to the lower end of the joint portion 121. The joint portion 121 is provided with a rear portion The end (ie, the left side of the drawing) is obliquely upwardly extended toward the front end (ie, the right side of the drawing) and the through hole 123 is provided for the rear end of the tensile nail 11 to be disposed. The fixing section 122 is provided with a plurality of perforations 124 at longitudinal intervals.

The rib nail 11 is placed between the femoral rotor 21 and the Femoral Neck 22, and the rear end of the rib nail 11 is placed in the through hole 123 of the side plate 12 to prevent the back end of the nail 11 from coming out. Outside the through hole 123 of the side plate 12, a plug body 14 is usually inserted in the through hole 123, and the fixing portion 122 of the side plate 12 is laterally abutted against the femoral shaft 23, and the pressing screws 13 are further applied. Each of the perforations 124 is passed through and then screwed into the femoral shaft 23, so that the installation of the sliding hip joint screw can be completed. This is effective against biological shear forces, and the device is capable of withstanding the axial load of the hip when the body is loaded with weight to achieve early bone healing.

However, since only a third of the rear end of the rib nail 11 is placed in the joint section 121 of the side panel 12, the whole rib nail 11 forms a cantilever state, so that the postoperative use period is a long time. The portion of the nail 11 exposed outside the joint portion 121 of the side panel 12 is prone to sagging deformation, and may cause greater damage to the patient, so that the original fracture has a more serious sequelae and is difficult to heal.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a fixing device for a broken bone which can enhance the locking position, avoid the occurrence of a cantilever situation, and improve durability.

Thus, the fracture bone fixation device of the present invention comprises a bone nail having a connecting section, a side plate, a plurality of locking screws, and a connecting rod.

The side panel has an abutting portion for abutting against the side of the fractured bone, and an engaging portion which is inclined upwardly from one end of the abutting portion and can be extended by the connecting portion of the bone nail, the abutting portion A plurality of fixing holes are arranged at intervals in the longitudinal direction.

The locking screws respectively extend through the corresponding fixing holes and are locked to the fractured bone.

The connecting rod is detachably connected between the abutting portion of the side plate and the bone nail.

The effect of the invention is that the connecting rod obliquely supports the bone nail, which not only can strengthen the positioning of the nail, but also avoid the bending deformation caused by the cantilever situation.

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.

Before the present invention is described in detail, it is noted that in the following description, similar elements are denoted by the same reference numerals.

Referring to Figures 3 and 4, a first preferred embodiment of the fracture bone fixation device of the present invention comprises a bone nail 3, a side panel 4, a plurality of locking screws 5, and a connecting rod 6. The bone nail 3 has a connecting section 31, a cone section 32 connected to one end of the connecting section 31, and a screwing section 33 connected to the cone section 32. The outer peripheral wall surface of the cone section 32 is formed. The cross-sectional diameter of the cone section 32 is gradually reduced by the connecting section 31 toward the screwing section 33. The cone section 32 is provided with a recessed hole 321 extending obliquely.

The side panel 4 has an abutting portion 41 extending straight, and an engaging portion 42 which is inclined upwardly from one end of the abutting portion 41. The abutting portion 41 has an oblique hole 411 extending obliquely upward, and a plurality of longitudinal intervals The fixing holes 412 are arranged in the lateral direction, and the oblique holes 411 are provided with internal threads, and each fixing hole 412 is just enough for a locking screw 5 to penetrate. In addition, the joint portion 42 has a hole 421 which can be matched with the upward angle and has open ends. The hole 421 is for the connecting portion 31 of the nail 3 to be worn.

The connecting rod 6 has a shaft 61, a stopping portion 62 at one end of the shaft 61, a protruding post 65 at the other end of the shaft 61, and a protrusion formed on the outer surface of the shaft 62 adjacent to the stopping portion 62. Threaded section 63.

In addition, the fixing device for the fractured bone of the present invention further includes a pressing member 7 for being disposed in the opening 421 of the engaging portion 42 of the side plate 4.

Referring to Figures 3 and 4, the fracture bone fixation device of the present invention is suitable for the treatment of a fracture of the hip femur rotor 81. The bone nail 3 is first driven into the two fracture bones 811, 812, and the connection portion 31 of the bone nail 3 is placed. In the hole 421 of the joint portion 42 of the side plate 4, the pressing member 7 is disposed in the hole 421 and abuts against the end edge of the connecting portion 31 of the bone nail 3, and the abutting portion 41 of the side plate 4 is side. Abutting the femoral shaft 82, the locking screws 5 are inserted through the fixing holes 412 of the side plate 4 one by one to be screwed and fixed to the femoral shaft 82, and then the connecting rod 6 is threaded through the oblique hole 411 of the side plate 4. The threaded portion 63 is screwed into the internal thread of the oblique hole 411 of the side plate 4, and the stopping portion 62 of the connecting rod 6 is inserted into the oblique hole 411, and the protruding post 65 is extended to the nail 3 In the recess 321 , the connecting rod 6 is detachably connected between the abutting portion 41 of the side plate 4 and the nail 3 to complete the installation treatment of the fixing device for the broken bone.

Since the connecting rod 6 is an obliquely pedestal nail 3, the positioning of the nail 3 can be strengthened, and the bone nail 3 combined with one end and the side plate 4 can be prevented from forming a cantilever condition to cause bending deformation.

Referring to Figure 5, there is shown a second preferred embodiment of the fracture bone fixation device of the present invention. The preferred embodiment is substantially identical to the first preferred embodiment, except that the threaded section 63 of the connecting rod 6 is formed in The entire outer surface of the shaft 61, of course, the oblique hole 411 of the side plate 4 (see Figs. 3 and 4) and the concave hole 321 of the nail 3 are fitted with internal threads (not shown). 3 and 4, in practicality, the connecting rod 6 of the preferred embodiment can also be inserted into the oblique hole 411 of the side plate 4 with its stopping portion 62, and the threaded portion 63 is partially connected with the nail. The recessed hole 321 of the third hole and the internal thread of the oblique hole 411 are screwed together, thereby providing the same effect as the first preferred embodiment.

Referring to FIG. 6, which is a third preferred embodiment of the fracture bone fixing device of the present invention, the preferred embodiment is substantially the same as the first preferred embodiment, and the difference lies in the outer surface of the shaft 61 of the connecting rod 6. Two externally threaded segments 63, 64 are formed at intervals. Referring to Figures 3 and 4, of course, the oblique holes 411 of the side plate 4 and the concave holes 321 of the nail 3 are fitted with internal threads (not shown). Practically, one end of the connecting rod 6 is engaged with the retaining portion 62 in the oblique hole 411 of the side plate 4, and an external thread segment 63 is screwed to the oblique hole 411. The other end of the tube 6 is partially screwed to the recessed hole 321 of the nail 3 by another externally threaded section 64, thereby providing the same effect as the first preferred embodiment.

Referring to Figure 7, there is shown a fourth preferred embodiment of the fracture bone fixation device of the present invention. The preferred embodiment is substantially identical to the first preferred embodiment, except that the cone segment 32 of the bone nail 3 is also It can be omitted, that is, the bone nail 3 has only one connecting section 31, and a screwing section 33 connected to the connecting section 31, and the recessed hole 321 is located on the connecting section 31 and is located on the side panel 4. The outside of the joint portion 42. The stop portion 62 of the connecting rod 6 is inserted into the oblique hole 411 of the side plate 4, and the threaded portion 63 is screwed into the inner hole of the oblique hole 411 of the side plate 4, and the protruding post 65 is also extended. The recess 321 of the nail 3 is also provided with the same effect as the first preferred embodiment.

It can be understood that the connecting rod 6 and the concave hole 321 of the nail 3 in the fourth preferred embodiment can also be the second and third preferred embodiments, that is, the connecting rod 6 has at least one The externally threaded section 63 or 64, and the concave hole 321 of the nail 3 is provided with an internal thread, and the externally threaded section 63 or 64 is screwed to the oblique hole 411 of the side plate 4 or the concave hole 321 of the nail 3, respectively.

In summary, the fixing device of the fractured bone of the present invention, by the above-mentioned structural design, uses the connecting rod 6 to obliquely support the bone nail 3, which not only can strengthen the positioning of the bone nail 3, but also avoid combining the one end with the side plate 4. Since the nail 3 forms a cantilever and the bending deformation does not occur, 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.

3. . . Bone nail

31. . . Connection segment

32. . . Cone segment

321. . . Concave hole

33. . . Screwing section

4. . . Edge board

41. . . Abutment

411. . . Oblique hole

412. . . Fixed hole

42. . . Joint

421. . . Tunnel

5. . . Locking screw

6. . . Connecting rod

61. . . Shaft

62. . . Stop

63, 64. . . Thread segment

65. . . Tab

7. . . Compression

81. . . Femoral rotor

811, 812. . . Broken bone

82. . . Femoral shaft

Figure 1 is an exploded view showing a conventional sliding hip joint screw;

Figure 2 is a combined schematic diagram, which assists in explaining the use of Figure 1;

Figure 3 is an exploded perspective view showing the first preferred embodiment of the fracture bone fixing device of the present invention;

Figure 4 is a schematic cross-sectional view showing the use of the first preferred embodiment;

Figure 5 is a schematic view showing a second preferred embodiment of the fixing device for fractured bone of the present invention;

Figure 6 is a schematic view showing a third preferred embodiment of the fixing device for fractured bone of the present invention;

Figure 7 is a partial cross-sectional view showing a combined state of the fourth embodiment of the present invention.

3. . . Bone nail

31. . . Connection segment

32. . . Cone segment

321. . . Concave hole

33. . . Screwing section

4. . . Edge board

41. . . Abutment

411. . . Oblique hole

412. . . Fixed hole

42. . . Joint

421. . . Tunnel

5. . . Locking screw

6. . . Connecting rod

61. . . Shaft

62. . . Stop

63. . . Thread segment

65. . . Tab

7. . . Compression

Claims (7)

A fixing device for a fractured bone, comprising: a bone nail having a connecting section; a side plate having an abutting portion for abutting against the side of the fractured bone, and an inclined portion rising from one end of the abutting portion a joint portion for extending the connecting portion of the bone nail, wherein the abutting portion is arranged with a plurality of fixing holes at a longitudinal interval; a plurality of locking screws respectively extend through the corresponding fixing holes and are locked on the fractured bone And a connecting rod detachably connected between the abutting portion of the side plate and the bone nail. The anchoring device for a fractured bone according to claim 1, wherein the abutting portion of the side plate has an oblique hole extending obliquely upward, the oblique hole is provided with an internal thread, and the bone nail further has a recessed hole, the connecting rod has a shaft, and at least one threaded section formed on an outer surface of the shaft, one end of the connecting rod is screwed in the oblique hole, and the other end is extended on the nail Inside the recess. The fixing device for a fractured bone according to the second aspect of the invention, wherein the other end of the connecting rod forms a protrusion to extend into the concave hole of the bone nail. The fixing device for a fractured bone according to the second aspect of the invention, wherein the concave hole of the bone nail is internally threaded, and the other end of the connecting rod is screwed into the concave hole of the bone nail. The fracture bone fixing device according to any one of claims 2 to 4, wherein the joint portion of the side plate has a hole which can be matched with the upward angle and has open ends, and the hole is used for the hole. For the connecting portion of the bone nail to be worn. The fracture bone fixing device according to claim 5, wherein the bone nail further has a screwing portion connected to the connecting portion, the concave hole is located on the connecting portion and is located on the side plate. Outside the joint. The fracture bone fixing device according to claim 5, wherein the bone nail further has a cone segment connected to one end of the connecting portion, and a screwing portion connected to the cone segment, The section diameter of the cone section is tapered by the connecting section toward the screwing section, and the recessed hole is located on the cone section.