Split type bone moving internal fixation bone plate

Abstract

This utility model belongs to the field of medical device technology, specifically disclosing a split-type bone transport internal fixation plate, including a fixation plate with several through-holes evenly spaced on it. Kirschner wire holes are located at both ends of the fixation plate. Several adjusting sleeves are fitted onto the fixation plate, each sleeve engaging with the fixation plate through internal holes. The width of the holes is greater than the width of the fixation plate. A through-hole cylindrical hole is located on the left side of each adjusting sleeve. A common guide cylinder is fitted into the cylindrical holes on the adjusting sleeves, and several C-clamps are fitted onto the guide cylinder. This utility model uses bone screws to fix the fixation plate to both ends of the bone defect within the patient's body. The rotatable C-clamps allow for more effective fixation of free bone segments. The distance between the free bone segments and the bone fixed by the fixation plate can be adjusted, facilitating flexible adjustment of the spacing of the free bone segments during bone transport surgery, resulting in more accurate tissue growth for the patient.

Description

Technical Field

[0001] This utility model belongs to the field of medical device technology, specifically relating to a split-type bone transport internal fixation plate. Background Technology

[0002] Bone transport is currently the most effective clinical method for treating challenging fracture conditions such as bone defects, nonunion, bone infection, and knee stiffness. Furthermore, bone transport simplifies the previously cumbersome and difficult treatment process for these cases. Bone transport can also simultaneously treat patients with bone defects or nonunion accompanied by multiple complications such as bone infection, bone shortening, and foot drop.

[0003] Current bone transport techniques involve severing the bone proximal or distal to the bone defect and then using a specialized external fixator to gradually move the severed bone segment towards the defect. New bone tissue forms along the path the severed segment has taken, until the bone defect is repaired. However, using an external fixator often causes secondary trauma to the patient's tissues, restricts patient movement, and makes the surgery quite complex.

[0004] To minimize secondary injury, a plate is currently used to fix the bone defect in the patient's body. During bone transport surgery, the distal and proximal ends of the bone defect are fixed, and the newly formed bone is then directly fixed onto the internal fixation plate after the transport. However, this type of plate fixation is not ideal for bone transport fixation that requires close embracing of free bone. Furthermore, in the treatment of diabetic foot patients, tibial transverse bone transport surgery is required, and the fixed structure of a standard internal fixation plate cannot be adjusted to minimize harm to each patient. Utility Model Content

[0005] To address the aforementioned issues and facilitate internal fixation of the bone requiring fixation during bone transport surgery, thereby reducing secondary damage and allowing for adaptive adjustments to the bone to be transported, this invention proposes a split-type bone transport internal fixation plate. The plate is fixed to both ends of the bone requiring transport using bone screws. Then, bone screws are used to fix the free bone segment to the C-clamp. By adjusting two adjusting sleeves fitted onto the fixation plate, the track cylinder is positioned at a suitable distance from the fixation plate, and the C-clamp is fixed to the track cylinder at a suitable angle to the free bone segment. This allows for simultaneous lateral distance adjustment of the free bone segment during transport.

[0006] To achieve the technical objectives mentioned above, this utility model is implemented through the following technical solution: a split-type bone transport internal fixation plate, including a fixation steel plate;

[0007] The fixing steel plate is in the shape of a cuboid strip, and has several through fixing holes evenly spaced on it. Kirschner wire holes are provided at both ends of the fixing steel plate. Two adjusting sleeves are fitted onto the fixing steel plate. A cylindrical hole that runs through the front and back is provided on the left side of each adjusting sleeve. A track cylinder is fitted into the cylindrical hole on both adjusting sleeves. Several C-shaped clips are fitted onto the track cylinder.

[0008] Furthermore, the fixing hole is composed of two threaded holes of different sizes that partially overlap, which facilitates the selection of bone screws of appropriate diameter for fixing;

[0009] Furthermore, the adjusting sleeve is fitted onto the fixed steel plate through an internally opened sleeve hole. The width of the sleeve hole is greater than the width of the fixed steel plate, thereby allowing the adjusting sleeve to move left and right on the fixed steel plate to change its position.

[0010] Furthermore, the adjusting sleeve has an elongated slot parallel to the axis of the fixing hole, and a fastening inner bolt is installed in the elongated slot. The upper end of the fastening inner bolt has an internal hexagonal hole, and the fastening bolt can move laterally within the elongated slot.

[0011] Furthermore, the bottom of the fastening inner bolt is provided with an internal threaded hole and a stud is sleeved thereon. The adjusting sleeve can be clamped by the cooperation of the stud and the fastening inner bolt, so that the adjusting sleeve and the fixed steel plate are fixed to each other.

[0012] Furthermore, protruding keys are installed on both sides of the long slot below the adjusting sleeve, and the lower end of the stud is square and can be locked inside the protruding key to prevent the stud from rotating when the inner bolt is rotated to tighten it.

[0013] Furthermore, the front end of the C-clamp is C-shaped and can be fitted onto the track cylinder, allowing it to rotate on the track cylinder. The C-clamp is provided with screw holes to facilitate fixing the C-clamp to the free bone segment that needs to be moved.

[0014] Furthermore, the two ends of the track cylinder are threaded with limit sleeves to prevent the two ends of the track cylinder from falling off the adjustment sleeves.

[0015] The beneficial effects of this utility model are:

[0016] 1. This utility model can fix the fixation plate and the two ends of the bone defect in the patient's body with bone screws. After fixing the free bone segment to be moved with the C-clamp, the free bone segment can be moved along the track cylinder. The rotatable C-clamp can fix the free bone segment more effectively and prevent deviation after fixation due to different angles.

[0017] 2. By adjusting the position of the adjusting sleeve fitted onto the fixing steel plate, the distance between the track cylinder and the fixing steel plate can be adjusted, thereby changing the distance between the free bone segment fixed on the C-clamp and the bone fixed on the fixing steel plate. This facilitates flexible adjustment of the spacing of the free bone segments during bone transport surgery, making the patient's tissue growth more accurate. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the embodiments are briefly introduced below.

[0019] Figure 1 This is an overall schematic diagram of Embodiment 1 of the present utility model;

[0020] Figure 2 This is a schematic diagram of the overall structure of Embodiment 1 of this utility model;

[0021] Figure 3 This is a partial structural schematic diagram of Embodiment 1 of this utility model;

[0022] Figure 4 This is a cross-sectional view of Embodiment 1 of this utility model;

[0023] Figure 5 This is a schematic diagram of the C-shaped clip structure of Embodiment 1 of this utility model.

[0024] The structural names represented by each number in the attached diagram are as follows:

[0025] 1-Fixed steel plate, 2-Fixed hole, 3-Kirsch pin hole, 4-Adjusting sleeve, 401-Long slot hole, 402-Sleeve hole, 403-Cylindrical hole, 404-Protruding key, 5-Fastening inner bolt, 501-Staple nail, 6-Railway cylinder, 7-C-type clamp, 701-Screw hole, 8-Limit sleeve. Detailed Implementation

[0026] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments.

[0027] Example 1

[0028] See Figures 1 to 5 As shown, and based on the contents of this specification, a split-type bone transport internal fixation plate is proposed, including a fixation plate 11;

[0029] The fixation plate 1 is a rectangular strip, made of titanium alloy. Titanium alloy is high in strength, lightweight, and has excellent biocompatibility, making it widely suitable for implantation. The fixation plate 1 has 12 through-holes 2 evenly spaced. Each hole 2 consists of two overlapping threaded holes of different sizes, facilitating the selection of bone screws of appropriate diameter for fixation. Kirschner wire holes 3 are located at both ends of the fixation plate 1, allowing for positioning of the fixation plate 1 using Kirschner wires inserted through these holes.

[0030] Two adjusting sleeves 4 are fitted onto the fixed steel plate 1. The adjusting sleeves 4 are fitted onto the fixed steel plate 1 through internal sleeve holes 402. The width of the sleeve holes 402 is greater than the width of the fixed steel plate 1, so that the adjusting sleeves 4 can move left and right on the fixed steel plate 1 to change their position. The adjusting sleeves 4 have elongated slots 401 parallel to the axis of the fixed hole 2. A fastening inner bolt 5 is installed in the elongated slot 401. The upper end of the fastening inner bolt 5 has an internal hexagonal hole, and the fastening bolt can pass through the elongated slot. The inner bolt 5 is moved laterally within 401. The bottom of the inner bolt 5 is provided with an internal threaded hole and a stud 501 is fitted on it. The two sides of the long slot 401 below the adjusting sleeve 4 are provided with protruding keys 404. The lower end of the stud 501 is square and can be locked inside the protruding key 404 to prevent the stud 501 from rotating when the inner bolt 5 is rotated. The adjusting sleeve 4 can be clamped by the cooperation between the stud 501 and the inner bolt 5, so that the adjusting sleeve 4 and the fixed steel plate 1 are fixed to each other.

[0031] The left side of the adjusting sleeve 4 has a through cylindrical hole 403. A track cylinder 6 is fitted into the cylindrical hole 403 on both adjusting sleeves 4. Two C-shaped clips 7 are fitted onto the track cylinder 6. The front end of the C-shaped clip 7 is "C" shaped and can be fitted onto the track cylinder 6 and can rotate on the track cylinder 6. The C-shaped clip 7 has a screw hole 701 to facilitate fixing the C-shaped clip 7 to the free bone segment that needs to be moved. The two ends of the track cylinder 6 are threaded with limit sleeves 8 to prevent the two ends of the track cylinder 6 from falling out of the adjusting sleeve 4.

[0032] When using this split-type bone transport internal fixation plate, first select the appropriate distance for fixing the plate 1 to be fixed on the bone according to the distance of the free bone to be transported by the patient, and assemble the plate as a whole. Use the tightening inner bolts 5 and studs 501 to install the adjusting sleeves 4 on the fixing plate 1. Then, first attach the two C-clamps 7 to the track cylinder 6, then attach the track cylinder 6 to the cylindrical holes 403 of the two adjusting sleeves 4, and tighten the limiting sleeves 8 at both ends of the track cylinder 6. Then, Kirschner wires are inserted into the Kirschner wire holes 3 and positioned proximally and distally at the bone defect site. After determining the position of the fixation plate 1, bone screws are used in conjunction with the fixation holes 2 to fix the fixation plate 1 to the patient's bone. Then, the position of the adjusting sleeve 4 on the fixation plate 1 is adjusted so that the track cylinder 6 and the fixation plate 1 reach a suitable distance. After that, the C-clamp 7 can be fixed to the free bone segment that needs to be moved. The C-clamp 7 and the track cylinder 6 can make the bone plate and the patient's bone more effectively fixed. After fixation, the free bone segment can be moved along the direction of the track cylinder 6.

[0033] The embodiments of the present invention disclosed above are merely illustrative of the present invention. The preferred embodiments do not describe all details exhaustively, nor do they limit the present invention to the specific implementations described. Obviously, based on the content of this specification, those skilled in the art will understand that various modifications and variations can be made to these embodiments without departing from the principles and spirit of the present invention.

Claims

1. A split type bone moving internal fixation bone plate, characterized in that, Including the fixing steel plate (1): The fixed steel plate (1) has several through fixing holes (2) at equal intervals, and Kirschner wire holes (3) are opened at both ends of the fixed steel plate (1); several adjusting sleeves (4) are sleeved on the fixed steel plate (1), and a cylindrical hole (403) is opened on the left side of the adjusting sleeve (4) and a track cylinder (6) is sleeved in the cylindrical hole (403) on the several adjusting sleeves (4), and several C-shaped clips (7) are sleeved on the track cylinder (6).

2. The split bone transport internal fixation bone plate of claim 1, wherein: The fixing hole (2) is composed of two threaded holes of different sizes that partially overlap.

3. The two-part bone transport internal fixation bone plate of claim 2, wherein: The adjusting sleeve (4) is fitted onto the fixed steel plate (1) through an internal sleeve hole (402), the width of which is greater than the width of the fixed steel plate (1).

4. The two-part bone transport internal fixation bone plate of claim 3, wherein: The adjusting sleeve (4) has elongated slots (401) that are parallel to the axis of the fixing hole (2) and are symmetrically opened on the upper and lower sides of the sleeve hole (402).

5. The two-part bone transport internal fixation bone plate of claim 4, wherein: An internal fastening bolt (5) is installed in the long slot (401), and an internal hexagonal hole is provided at the upper end of the internal fastening bolt (5).

6. The two-part bone transport internal fixation bone plate of claim 5, wherein: The bottom of the fastening inner bolt (5) has an internal threaded hole and is fitted with a stud (501), the lower end of which is square.

7. The two-part bone transport internal fixation bone plate of claim 6, wherein: The long slot (401) below the adjusting sleeve (4) is equipped with protruding keys (404) on both sides, and the inner side of the protruding key (404) is engaged with the lower end of the stud (501).

8. The two-part bone transport internal fixation bone plate of claim 7, wherein: The front end of the C-clamp (7) is "C" shaped, and the C-clamp (7) has screw holes (701).

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