CN204318879U - Bone grafting instrument - Google Patents

Abstract

The utility model discloses a bone implant device. The outer shell (1) is equipped with a fixed baffle (11) inside, and one side of the fixed baffle (11) is provided with a bone particle groove (12) and a bone particle clip (31). The piston (3) runs in the bone particle holder (31) and the spring chamber (21), and is provided with a bone particle outlet (22). The handle (10) is fixed on one end of the push rod (7), and the other end of the push rod (7) passes through the housing cover (2), snap ring (15), piston (5), spring (9), and the raised stopper (14) It is connected with the piston (4), and the inclined surface of the piston (4) is provided with a trapezoidal groove (16) slideway, which coincides with the narrow inverted trapezoidal protrusion (18), and the wide inverted trapezoidal protrusion (19) coincides with the wide trapezoidal groove (20) Connect, press the handle (10) to make the compacting head (17) move laterally. During the operation, the bone particles can be filled quickly, accurately in place, without scattering, and the bone particles can be evenly compacted. The device can be completely disassembled, which is convenient for cleaning, disinfection and installation.

Description

bone graft

Technical field:

The utility model relates to a bone grafting device, in particular to a clinical bone grafting device which needs to perform bone grafting and compaction due to local bone defect in the long tubular bone operation process.

Background technique:

In the department of orthopedics in modern medicine, in the treatment of most metaphyseal fractures and bone tumors, local bone defects with limited cortical bone destruction occur after fracture reduction or tumor curettage, and it is necessary to control the supporting cortical bone as much as possible during the operation. Minimal reduction of iatrogenic bone destruction. The bone graft operation window is narrow, the bone graft area is deep, the amount of bone graft required during the operation is large, the bone particles are filled many times, the bone particles are scattered, it is not easy to clean up, and the bone particles are not evenly compacted due to the angle of no force. Bone grafts are not easily absorbed. Bone grafting takes a long time, more bleeding, longer recovery time, the amount and degree of bone grafting are not exact, and there are many complications after surgery.

Utility model content:

In order to solve the above problems, the utility model provides a bone implant device, which can perform bone grafting due to local bone defects during the operation, and has the advantages of small operation channel, short bone grafting time, accurate filling of bone particles, and compact Solid and uniform bone grafting instrument.

The technical solution of the utility model is: a cylindrical shell, a fixed baffle is installed horizontally in the center of the interior, a bone particle groove is provided on one side of the fixed baffle, inclined surfaces are provided at both ends of the bone particle groove to form a parallelogram, and the bone particle groove is installed into the corresponding Anastomotic bone pellet clip. The piston runs in the bone particle holder and the spring chamber. The piston is set to be hollow and shaped like a water cup. The inner bottom is connected with one end of the pull rod with a threaded connection. distance, increase the spring strength, and reduce the length of the instrument. Tie rod housing trapezoidal groove 20 is anastomosingly connected. The compacting head 17 is provided with a compacting surface 28 and a compacting surface 29. Different types of compacting heads 17 can be replaced according to bone grafting requirements. The shell 1 just behind the compacting surface 28 is equipped with a protrusion 30 at an obtuse angle with the shell 1 plane.

The utility model has the advantages that: 1. The bone particles can be quickly filled in the operation process, accurately in place, and without scattering. Effectively shorten the operation time, reduce bleeding, and speed up the postoperative recovery of patients. 2. During the operation, the amount of bone filling particles can be controlled according to the length of the handle. If the amount of bone particles to be filled is large, the bone particle clip can be replaced quickly, which is easy to operate. 3. During the operation, the shell directly behind the compaction surface is equipped with a protrusion forming an obtuse angle with the plane of the shell as the fulcrum, and the compaction surface is forced horizontally to evenly compact the bone particles. Facilitate rapid postoperative bone healing. 4. During the operation, there is no need to change the instrument after the bone particles in the invisible part are compacted, just raise the handle, release the bone particles, and tamp them with the tamping surface. 5. The device can be completely disassembled for easy cleaning and disinfection. Easy to install without technical difficulty.

Description of drawings

Fig. 1 is the structural diagram of the front section of the utility model.

Detailed ways

The following is a detailed description in conjunction with the accompanying drawings: as shown in the figure, the cylindrical shell 1 is equipped with a fixed baffle 11 horizontally in the middle of the interior, and one side of the fixed baffle 11 is provided with a bone particle groove 12, and the two ends of the bone particle groove 12 are provided with inclined planes parallel to each other. Quadrilateral, bone particle groove 12 is packed into matching bone particle folder 31. The piston 3 runs in the bone particle clamp 31 and the spring chamber 21. The piston 3 is set hollow and shaped like a water cup. The inner bottom is connected with the screw thread 24 at one end of the pull rod 6. The connection between the inner bottom of the piston 3 and the tie rod 6 and the shell cover 2 A spring 8 is housed, and the other end of the pull rod 6 protrudes outside the shell cover 2, and the part protruding out of the shell cover 2 has a matte anti-skid surface 27. The bone particle folder 31 is consistent with the inner wall of the spring chamber 21 and coincides with the outer wall of the piston 3 . Put down the pull rod 6, the piston 3 enters the bone particle folder 31, fixes the bone particle folder 31, and extrudes the bone particle 13 from the bone particle outlet 22. The bone particle outlet 22 is located at about 2/3 of the right angle distance from the fixed baffle 11 to the housing 1 . The other side of the fixed baffle 11 is provided with a handle 10 fixed on one end of the push rod 7 , and the other end of the push rod 7 passes through the housing cover 2 . The length between the handle 10 and the housing cover 2 is such that the handle 10 is pressed onto the housing cover 2 so that the bone particles 13 do not overflow at the junction of the narrow trapezoidal protrusion 18 and the wide trapezoidal protrusion 19 . The push rod 7 passing through the housing cover 2 is equipped with a jumper spring 15, and the position of the jumper spring 15 does not exceed the inside of the housing cover 2 in a static state. The push rod 7 is passing through the piston 5, and the thickness of the push rod 7 matches the middle hole of the piston 5. The push rod 7 can rotate in the middle hole of the piston 5, and the outer wall of the piston 5 matches the inner wall of the spring chamber 23. The protruding block 14 fixed in the casing 1 and the baffle plate 11 is positioned so that the narrow trapezoidal protrusion 18 of the compacting head 17 does not fall off in the trapezoidal groove 16 of the piston 4 when the piston 4 is at rest. The push rod 7 is connected to the piston 4 through the screw thread 26 of the protruding block 14 . A spring 9 is installed between the protruding block 14 and the piston 5, the front section of the piston 4 forms an inclined plane, and the middle section of the inclined plane is provided with a trapezoidal groove 16 slideway, which is connected with the compacting head 17 with an inverted trapezoidal protrusion 18, and the compacting head 17 is an inverted trapezoidal Protrusion 19 is coincidently connected with shell trapezoidal groove 20. The shell 1 directly behind the compaction surface 28 is equipped with a protrusion 30 that forms an obtuse angle with the plane of the shell 1 .

Claims (5)

1. a bone grafting instrument, it is characterized in that: shell (1), fixed dam (11) is equipped with in inside, fixed dam (11) one side is provided with osseous granules groove (12), osseous granules folder (31) is housed, piston (3) runs in osseous granules folder (31) with spring storehouse (21), piston (3) cylinder lever connecting rod (6) one end, pull bar (6) other end stretches out casing cover (2) outward, spring (8) is housed between piston (3) and casing cover (2), osseous granules groove (12) one end is provided with osseous granules outlet (22), fixed dam (11) another side is provided with handle (10) and is fixed on push rod (7) one end, push rod (7) other end is by casing cover (2), piston (5), protruding block (14) is connected with piston (4), push rod (7) is equipped with jump ring (15) between casing cover (12) and piston (21), protruding block (14) is fixed in shell (1) and baffle plate (11), between protruding block (14) and piston (5), spring (9) is housed, piston (5) is stuck on the jump ring (15) of push rod (7), jump ring (15) is in casing cover (2), piston (4) leading portion becomes inclined-plane, stage casing, inclined-plane is provided with narrow dovetail groove (16) slideway, be connected with narrow inverted trapezoidal projection (18) the coincideing of compaction head (17), the wide inverted trapezoidal projection (19) of compaction head (17) is coincide with the wide dovetail groove (20) of shell (1) front end and is connected, compaction head (17) transverse movement is made by fixed handle (10).

2. bone grafting instrument according to claim 1, is characterized in that: osseous granules outlet (22) is located at fixed dam (11) to distance about 2/3 place, shell (1) right angle.

3. bone grafting instrument according to claim 1, it is characterized in that: osseous granules groove (12) two ends are provided with inclined-plane and become parallelogram, load osseous granules folder (31) that matches, osseous granules folder (31) is consistent with spring storehouse (21) internal diameter, coincide with piston (3), put down pull bar (6), piston (3) enters osseous granules folder (31), fixing osseous granules folder (31).

4. bone grafting instrument according to claim 1, it is characterized in that: piston (3) is set to hollow, become water-cup-shaped, inner bottom part is connected with pull bar (6) one end screw thread (24), lengthens the distance of spring (8) and casing cover (2).

5. bone grafting instrument according to claim 1, is characterized in that: casing cover (2) is stretched out outward partly with anti-skid frosted face (27) in resting state pull bar (6) one end.