Bone hammer finger clamp and use method thereof

Abstract

The invention provides a bony hammer finger clamp which comprises a joint bearing assembly and a pressure applying assembly, the pressure applying assembly is rotationally arranged on one side of the upper portion of the joint bearing assembly, the joint bearing assembly is used for placing a finger, and one end of the pressure applying assembly abuts against a fracture block. The device is simple in structure, convenient to manufacture and low in cost. The bone block fixing needle is utilized to pressurize a reset fracture block and maintain normal alignment, so that the operation difficulty can be reduced, the risk that the bone block is broken due to internal fixation is reduced, the success rate of one-time reset fixation is improved, the operation time is shortened, and the dependence on the skill and experience of an operator is reduced; and meanwhile, the soft joint supporting bracket can maintain the straightening position fixation of the distal interphalangeal joint under the condition of not damaging skin soft tissues, so that the joint surface injury caused by the use of a kirschner wire for threading and fixing is avoided, and the later joint function exercise is facilitated.

Description

Technical Field

[0001] The invention belongs to the technical field of medical devices, and in particular relates to a bony mallet finger clamp and a use method thereof. Background Art

[0002] If bony mallet finger (dorsal avulsion fracture of the distal phalanx base) is not properly treated, it will affect the appearance and function of the finger. It is a common case in hand surgery. (Open) reduction and pinning / blocking fixation with Kirschner wires, or wire fixation and reconstruction of the finger pulp are commonly used treatment methods. However, this traditional reduction and fixation method has certain difficulties:

[0003] 1. The avulsed bone fragment is small, and direct needle insertion may cause the bone fragment to break.

[0004] 2. The method of using Kirschner wire to block the bone block has a small insertion angle, is difficult to operate, and requires high technical experience from the operator.

[0005] 3. The fracture is caused by avulsion of the extensor tendon attachment point. The external contour of the bone block has a large curvature, and there are angles between the fracture line and the horizontal plane of the phalanx, the frontal plane, and the sagittal plane. The method of using the fingertips to lead out the wire to fix the attachment point for reconstruction is difficult to grasp the position of the wire on the surface of the bone block, and it is difficult to find the angle for leading out and fixing the wire, which can easily cause flipping and misalignment of the bone block.

[0006] 4. The reconstruction method of using the steel wire to fix the end point through the finger pulp requires pressure fixation outside the finger pulp. Long-term pressure on the skin is prone to necrosis. The process of piercing is prone to damage to soft tissues such as nerves and blood vessels.

[0007] 5. During the operation, the distal interphalangeal joint needs to be fixed with Kirschner wires, which destroys the integrity of the joint surface and easily causes postoperative joint stiffness.

[0008] 6. Traditional surgical procedures require high experience and technical level of the surgeon, with a low chance of one-time success. Prolonged operation time can easily cause surgeon fatigue. Multiple needle insertions can cause bone breakage, loosening of fixation, and other consequences. Repeated fluoroscopy during the operation will increase the physical damage of X-rays to both doctors and patients. Summary of the invention

[0009] In view of the above, the present invention aims to propose a bony hammer finger clamp and a method of using the same, so as to solve the problems that the reduction and fixation methods in the prior art are prone to cause bone fragmentation, bone flipping and misalignment, soft tissue damage such as nerves and blood vessels, and postoperative joint stiffness, and require high experience and technical level of the surgeon, with a low chance of one-time success, and repeated fluoroscopy during the operation will increase the physical damage of X-rays to both doctors and patients.

[0010] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0011] The first aspect of the present invention provides a bony hammer finger clamp, comprising a joint supporting component and a pressure component, wherein the pressure component is rotatably arranged on the upper side of the joint supporting component, the joint supporting component is used to place the finger, and one end of the pressure component abuts against the fracture fragment.

[0012] The joint supporting component is made of a see-through material.

[0013] Further, the joint support assembly includes a joint support bracket, a fixing belt, an arc-shaped portion, and a first mounting plate, wherein two ends of the fixing belt are arranged on one side of the bottom of the joint support bracket, and the middle portion of the fixing belt is arranged above the joint support bracket;

[0014] The arc-shaped portion is arranged at one end of the joint support bracket away from the fixing belt, and first mounting plates are arranged on both sides above the arc-shaped portion, and first through holes are arranged on the first mounting plates.

[0015] Furthermore, Velcro fleece surfaces are provided on the inner sides of both ends of the fixing belt, and Velcro hook surfaces corresponding to the Velcro fleece surfaces are provided on the bottom of the joint supporting bracket.

[0016] Furthermore, a soft cushion is provided on the joint support bracket and the arc-shaped portion.

[0017] The joint support is used to fix the distal interphalangeal joint, and its length is such that the distal end reaches the fingertip and the proximal end does not exceed the proximal interphalangeal joint.

[0018] The fixation strap can fix the joint support bracket on the palm side of the finger, thereby fixing the distal interphalangeal joint in an extended position to counteract the pressure of the bone fixation on the fracture fragment and thus maintain the alignment of the fracture. The fixation strap and the joint support bracket are connected by Velcro, and the tightness can be adjusted according to the different thicknesses of fingers.

[0019] To facilitate suturing, the fixation belt can be temporarily opened, and the assistant can hold the joint support to keep the joint straight. After suturing, apply a small piece of gauze or cotton ball to protect the incision, and then tighten the fixation belt.

[0020] The arc-shaped portion is provided to better fit the shape of the finger end, and the soft pad is provided to increase the comfort of the finger and maintain the distal interphalangeal joint in an extended position without damaging the skin and soft tissue.

[0021] There is no need to remove the clamp when changing the dressing after surgery. Just use tweezers to remove the small piece of gauze or cotton ball, and then continue to apply a new small piece of gauze or cotton ball after disinfection.

[0022] Furthermore, the pressure-applying assembly includes a bone block fixing needle, a fixing needle bolt, a needle handle, and a second mounting plate. The bone block fixing needle is a solid structure. One end of the bone block fixing needle is needle-shaped. The end of the bone block fixing needle away from the needle shape is arranged at one end of the needle handle through the fixing needle bolt. The second mounting plate is arranged below the other end of the needle handle. A second through hole corresponding to the first through hole is provided on the second mounting plate.

[0023] The needle handle, the second mounting plate and the fixing needle bolt are made of transparent materials.

[0024] The diameter of the bone block fixing needle is 1-1.2 mm.

[0025] The fixing pin bolt adopts a flat head bolt.

[0026] Furthermore, a clamp shaft is provided in the first through hole and the second through hole, and the needle handle is rotatably arranged on the clamp shaft through the second mounting plate.

[0027] Furthermore, a through slot is provided at one end of the needle handle away from the second mounting plate, and the bone block fixing needle is arranged in the through slot;

[0028] A threaded hole is arranged on one side wall of the through slot, a fixing needle bolt is arranged in the threaded hole, and an end of the fixing needle bolt abuts against the side wall of the bone block fixing needle.

[0029] The bone block fixing pin can move in the through slot, and the extension length and angle of the bone block fixing pin can be adjusted, so as to apply external pressure to the bone surface of the fracture fragment perpendicular to the fracture line to achieve the best fixation effect, and the bone block fixing pin can be tightly fixed in the through slot by the fixing pin bolt.

[0030] Furthermore, the needle handle, the second mounting plate and the joint support bracket are lever structures, and the needle handle and the second mounting plate are opened and closed with the joint support bracket through an elastic structure.

[0031] Preferably, the elastic structure is a torsion spring, and the torsion spring is sleeved on the clamp shaft.

[0032] The needle handle, the second mounting plate and the joint support bracket form a lever structure, with the fixture axis as the axis of the lever structure, which is opened and closed by a torsion spring. The needle handle and the torsion spring are used to control the bone fixation needle at the end of the needle handle to reduce and fix the fracture.

[0033] The second aspect of the present invention provides a method for using the bony mallet finger clamp according to the first aspect of the present invention, comprising the following steps:

[0034] S1: Lift the needle handle and bone block to fix the needle, and then place your fingers on the joint support bracket;

[0035] S2: Loosen the needle handle to press the bone fixation needle on the fracture fragment;

[0036] S3: Use the Velcro fleece surface and Velcro hook surface to stick the fixing strap onto the joint support.

[0037] Furthermore, after S2, the method further includes: after adjusting the extension length and angle of the bone block fixing pin, tightening the fixing pin bolt.

[0038] The bone fixation needle at the end of the needle handle is manipulated by the needle handle and the torsion spring to reduce and fix the fracture. The extension length and angle of the bone fixation needle are adjusted to apply external pressure to the bone surface of the fracture fragment perpendicular to the fracture line to achieve the best fixation effect. The bone fixation needle is then pressed and fixed to the needle handle by the fixing needle bolt.

[0039] The bony mallet finger clamp of the present invention can directly suture the bone block fixing needle into the incision when the incision is closed after surgery, or the bone block fixing needle can be passed through the skin proximal to the incision first, and then the bone fragment is reduced, fixed, and the incision is sutured.

[0040] Compared with the prior art, the bony mallet finger clamp and the use method thereof described in the present invention have the following advantages:

[0041] (1) The bony mallet finger clamp of the present invention has a simple structure, is easy to manufacture, and has low cost. It can improve the reliability of reduction and fixation, reduce the reliance on the surgeon's skills and experience, improve the success rate, and shorten the operation time.

[0042] (2) The bony mallet finger clamp of the present invention replaces pinning fixation with pressure fixation and replaces Kirschner wire joint fixation with external fixation with a support plate, so that the avulsed bone fragment can be reduced while reducing iatrogenic damage to bones, joints and skin soft tissues, reducing the subjective pain of patients after surgery, and facilitating joint function training in the later stage;

[0043] (3) The bony mallet finger clamp of the present invention can improve the success rate of a single operation, shorten the operation time, reduce the physical exertion of the operator, reduce the reliance on the operator's skills and experience, reduce the number of intraoperative fluoroscopy times, and reduce radiation damage to both doctors and patients. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0045] Figure 1 It is a side view schematic diagram of the bony mallet finger clamp according to an embodiment of the present invention;

[0046] Figure 2 It is a schematic diagram of a pressure assembly and a torsion spring of a bony hammer finger clamp according to an embodiment of the present invention;

[0047] Figure 3This is a schematic diagram of the use of the bony mallet finger clamp described in an embodiment of the present invention.

[0048] Description of reference numerals:

[0049] 1. Bone fragment; 2. Joint support bracket; 3. Fixing belt; 4. Arc-shaped portion; 5. First mounting plate; 6. Bone fragment fixing pin; 7. Fixing pin bolt; 8. Pin handle; 9. Second mounting plate; 10. Clamp shaft; 11. Through slot; 12. Torsion spring. DETAILED DESCRIPTION

[0050] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0051] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0052] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0053] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0054] like Figures 1 to 3 As shown, a bony hammer finger clamp includes a joint supporting component and a pressure component. The pressure component is rotatably arranged on the upper side of the joint supporting component. The joint supporting component is used to place the finger, and one end of the pressure component abuts against the fracture fragment 1.

[0055] The joint supporting component is made of a see-through material.

[0056] The joint support assembly includes a joint support bracket 2, a fixing belt 3, an arc-shaped portion 4, and a first mounting plate 5. The two ends of the fixing belt 3 are arranged on one side of the bottom of the joint support bracket 2, and the middle part of the fixing belt 3 is arranged above the joint support bracket 2.

[0057] The arc portion 4 is arranged at one end of the joint support bracket 2 away from the fixing belt 3 , and first mounting plates 5 are arranged on both sides above the arc portion 4 , and first through holes are arranged on the first mounting plates 5 .

[0058] Velcro fleece surfaces are provided on the inner sides of both ends of the fixing belt 3, and Velcro hook surfaces corresponding to the Velcro fleece surfaces are provided on the bottom of the joint supporting bracket 2.

[0059] The joint support bracket 2 and the arc-shaped portion 4 are provided with soft cushions.

[0060] The joint support bracket 2 is used to fix the distal interphalangeal joint, and its length is such that the distal end reaches the finger end and the proximal end does not exceed the proximal interphalangeal joint.

[0061] The fixing belt 3 can fix the joint support bracket 2 on the palm side of the finger, thereby fixing the distal interphalangeal joint in an extended position to counteract the pressure of the bone fixation needle 6 on the fracture fragment 1 to maintain the alignment of the fracture, and the fixing belt 3 and the joint support bracket 2 are connected by Velcro, and the tightness can be adjusted according to the different thicknesses of fingers.

[0062] For the convenience of suturing, the fixing belt 3 can be temporarily opened, and the assistant can hold the joint support 2 to keep the joint straight. After suturing, a small piece of gauze or cotton ball is applied to protect the incision, and then the fixing belt 3 is glued tightly.

[0063] The arc portion 4 is provided to better fit the shape of the finger end, and the soft pad can increase the comfort of the finger and maintain the distal interphalangeal joint in an extended position without damaging the skin and soft tissue.

[0064] There is no need to remove the clamp when changing the dressing after surgery. Just use tweezers to remove the small piece of gauze or cotton ball, and then continue to apply a new small piece of gauze or cotton ball after disinfection.

[0065] The pressure-applying assembly includes a bone block fixing needle 6, a fixing needle bolt 7, a needle handle 8, and a second mounting plate 9. The bone block fixing needle 6 is a solid structure. One end of the bone block fixing needle 6 is needle-shaped. The end of the bone block fixing needle 6 away from the needle shape is arranged at one end of the needle handle 8 through the fixing needle bolt 7. The second mounting plate 9 is arranged below the other end of the needle handle 8. The second mounting plate 9 is provided with a second through hole corresponding to the first through hole.

[0066] The needle handle 8, the second mounting plate 9 and the fixing needle bolt 7 are made of transparent materials.

[0067] The diameter of the bone block fixing needle 6 is 1-1.2 mm.

[0068] The fixing needle bolt 7 is a flat head bolt.

[0069] A clamp shaft 10 is disposed in the first through hole and the second through hole, and the needle handle 8 is rotatably disposed on the clamp shaft 10 via the second mounting plate 9 .

[0070] The end of the needle handle 8 away from the second mounting plate 9 is provided with a through slot 11, and the bone block fixing needle 6 is arranged in the through slot 11;

[0071] A threaded hole is provided on one side wall of the through slot 11 , and the fixing needle bolt 7 is arranged in the threaded hole. The end of the fixing needle bolt 7 abuts against the side wall of the bone block fixing needle 6 .

[0072] The bone block fixing needle 6 can move in the through groove 11, and the extension length and angle of the bone block fixing needle 6 can be adjusted, so as to apply external pressure to the bone surface of the fracture fragment 1 perpendicular to the fracture line to achieve the best fixation effect, and the bone block fixing needle 6 can be tightly fixed in the through groove 11 by using the fixing needle bolt 7.

[0073] The needle handle 8 and the second mounting plate 9 form a lever structure with the joint support bracket 2 , and the needle handle 8 and the second mounting plate 9 are opened and closed with the joint support bracket 2 via a torsion spring 12 .

[0074] The needle handle 8, the second mounting plate 9 and the joint support bracket 2 form a lever structure, with the clamp shaft 10 as the axis of the lever structure, and opening and closing are achieved by the torsion spring 12. The needle handle 8 and the torsion spring 12 are used to control the bone fixation needle 6 at the end of the needle handle 8 to reduce and fix the fracture.

[0075] A method for using a bony mallet finger clamp comprises the following steps:

[0076] S1: lift the needle handle 8 and the bone block fixing needle 6, and then place the finger on the joint support 2;

[0077] S2: Loosen the needle handle 8 to press the bone block fixing needle 6 onto the fracture block 1;

[0078] S3: Adhere the fixing belt 3 to the joint supporting bracket 2 using the Velcro fleece surface and Velcro hook surface.

[0079] After S2, the process further includes: adjusting the extension length and angle of the bone block fixing needle 6 and tightening the fixing needle bolt 7.

[0080] The needle handle 8 and the torsion spring 12 are used to control the bone block fixing needle 6 at the end of the needle handle 8 to reduce and fix the fracture, and the extension length and angle of the bone block fixing needle 6 are adjusted to apply external pressure to the bone surface of the fracture fragment 1 perpendicular to the fracture line to achieve the best fixation effect. Then, the bone block fixing needle 6 is pressed and fixed on the needle handle 8 using the fixing needle bolt 7.

[0081] The bony mallet finger clamp of the present invention can directly suture the bone block fixing needle 6 into the incision when the incision is closed after surgery, or the bone block fixing needle 6 can be first passed through the skin proximal to the incision, and then the fracture fragment 1 is repositioned, fixed, and the incision is sutured.

[0082] Example 1

[0083] In a case of dorsal avulsion fracture of the base of the distal phalanx of the ring finger, after incision to expose the fracture and cleaning the fracture end, the avulsion fracture is reduced, and then the needle handle 8 is lifted to lift the bone block fixing needle 6, the finger is placed on the joint support bracket 2, the needle handle 8 is loosened, the bone block fixing needle 6 is pressed on the fracture fragment 1, the fixing belt 3 is glued to the joint support bracket 2, and the joint support bracket 2 is supported on the palm side of the finger to maintain the extended position of the distal interphalangeal joint, the length and angle of the bone block fixing needle 6 are adjusted according to the specific situation of the fracture to achieve the best fixation effect, and the fixing needle bolt 7 is tightened.

[0084] Since the bone block fixing needle 6 does not pass through the fracture fragment 1, it will not cause the fracture fragment 1 to break; since the pressure direction of the bone block fixing needle 6 is perpendicular to the fracture line, the fracture fragment 1 will not turn over, it is more stable, and the joint support bracket 2 outside the skin will not cause damage to the joint. The surgeon can easily adjust the pressure position of the bone block fixing needle 6 and the alignment of the fracture fragment 1 until the alignment is satisfactory. When closing the incision, the bone block fixing needle 6 can be directly sutured into the incision (between the skin edges), or the bone block fixing needle 6 can be pre-through the skin near the incision before the fracture is reduced and fixed, and then the fracture fragment 1 is reduced and fixed, and the incision is sutured after satisfaction (outside the wound skin edge). When suturing, the fixing belt 3 can be temporarily opened, and the assistant holds the joint support bracket 2 to keep the joint straight. After suturing, a small piece of gauze or cotton ball is applied externally to protect the incision, and then the fixing belt 3 is glued tightly.

[0085] Results: The reduction and fixation were successful at one time, and only one fluoroscopy was performed during the operation. The operation time was only 40 minutes, and the surgeon did not feel any obvious fatigue. The patient did not feel any obvious pain when the clamp was removed; after the joint was flexed and extended by itself, there was only a flexion limitation of <5°.

[0086] Example 2

[0087] In a case of a slightly displaced bony mallet finger at the distal phalanx of the ring finger, under local anesthesia, the needle handle 8 is lifted to lift the bone block fixation needle 6, the finger is placed on the joint support bracket 2, the needle handle 8 is loosened, the bone block fixation needle 6 is passed through the skin and directly pressed on the fracture fragment 1, the reduction and fixation conditions are checked by fluoroscopy, the length and angle of the bone block fixation needle 6 are adjusted according to the specific conditions of the fracture to achieve the best fixation effect, and the fixation needle bolt 7 is tightened; the fixation belt 3 is glued to the joint support bracket 2, and the joint support bracket 2 is supported on the palm side of the finger to maintain the straight position of the distal interphalangeal joint to resist the pressure of the bone block fixation needle 6 on the fracture fragment 1. The above operations can be repeated repeatedly during the operation to achieve the best fixation effect.

[0088] Results: The reduction and fixation were successful after two adjustments. Fluoroscopy was performed twice during the operation, and the operation time was 20 minutes. The patient had no obvious pain when the clamp was removed; and there was no obvious flexion and extension restriction after the joint was flexed and extended by itself.

[0089] Comparative Example 1

[0090] A case of dorsal avulsion fracture of the base of the distal phalanx of the ring finger was performed by the same doctor. After the bone fragment was reduced, the surgeon used a vascular clamp to reduce and pressurize it, fixed the fracture fragment with a Kirschner wire, and then fixed the distal interphalangeal joint in an extended position with a Kirschner wire for closed pinning. After the first operation, fluoroscopy showed that the fracture was not well aligned. After multiple attempts at pinning, the fracture fragment was broken. The surgeon then changed to using a steel wire to cross the surface of the fracture fragment at the insertion point of the extensor tendon, and then pass it out from the finger pulp along both sides of the distal phalanx. To ensure that the fracture was well aligned before fixation, the surgeon had to perform C-arm fluoroscopy while keeping the steel wire traction. It was found that the fracture fragment was flipped and poorly aligned, so the surgeon re-operated and performed fluoroscopy again until the reduction was satisfactory. The steel wire was tightened on the silicone pad on the finger pulp. During this process, attention should be paid to the tightness of the steel wire. If it is too loose, it cannot maintain sufficient force, and if it is too tight, it will cause the steel wire to break.

[0091] Results: According to the surgeon's experience, technique and anatomical knowledge, the surgeon attempted multiple reductions, adjusted the needle insertion point and angle multiple times, and adjusted the traction angle multiple times after changing to wire fixation. Five fluoroscopy sessions were performed during the operation, of which the surgeon was exposed to X-rays twice. The operation took 1 hour and 40 minutes. In the follow-up, the patient had obvious pain when the wire was removed, and the joint was stiff after the Kirschner wire was removed. After rehabilitation training, there was still about 10-15° of flexion limitation.

[0092] The traditional surgical method using Kirschner wire / wire fixation has the following disadvantages:

[0093] First, the fracture fragments are small, the success rate of direct needling is low, and multiple needling can easily cause the fracture fragments to break.

[0094] Second, when using wires for reconstruction and fixation, the operation requires a high level of technical experience: the position of the wire on the surface of the fracture fragment should be in the center of the fracture fragment; when leading it out from both sides of the phalanx, the neurovascular bundle should be avoided; when pulling and tightening on the palm side, the force should be kept perpendicular to the fracture line; and the appropriate force should be maintained when tightening the wire.

[0095] Third, when using steel wires for reconstruction and fixation, the steel wires are tightened and fixed on the soft pads of the fingertips, causing compression on the skin and posing a risk of necrosis.

[0096] Fourth, the distal interphalangeal joint needs to be fixed with Kirschner wires, and closed needling requires certain experience and skills; it will also damage the joint surface, which is not conducive to later joint function training.

[0097] Fifth, multiple fluoroscopy is required during the operation, and the surgeon may even need to hold a steel wire during the fluoroscopy, which increases the risk of radiation exposure.

[0098] Comparative Example 2

[0099] In a case of dorsal avulsion fracture of the base of the distal phalanx of the ring finger, the same doctor performed the operation. The distal phalanx was first flexed and the bone fragment was repositioned. Then a Kirschner wire was drilled into the dorsal side of the middle phalanx at an acute angle. The Kirschner wire body was used to block the traction and displacement of the fracture fragment. The distal interphalangeal joint was then straightened and closed and fixed with the Kirschner wire.

[0100] Results: The surgeon adjusted the needle insertion point and angle several times, so a total of three needle insertions were performed to achieve an acceptable alignment effect. Fluoroscopy was performed three times during the operation, and the operation took 1 hour and 20 minutes. In the follow-up, the joint was stiff after the Kirschner wire was removed, and there was still about 5-10° of flexion limitation after rehabilitation training.

[0101] The surgical method using Kirschner wire blocking has the following disadvantages:

[0102] First, the operation requires high technical experience: the insertion point of the Kirschner wire is close to the distal end, and the angle must be small enough, but small-angle insertion can easily cause the Kirschner wire to slip on the bone surface and fail.

[0103] Second, the distal interphalangeal joint needs to be fixed with Kirschner wires, and closed needle insertion requires certain experience and skills; it will also cause damage to the joint surface, which is not conducive to later joint function training.

[0104] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A bony hammer finger fixture, characterized in that: It comprises a joint supporting component and a pressure component. The pressure component is rotatably arranged on one side above the joint supporting component. The joint supporting component is used to place the finger. One end of the pressure component abuts against the bone fragment (1).

2. A bony mallet finger fixture according to claim 1, characterized in that: The joint support assembly comprises a joint support bracket (2), a fixing belt (3), an arc-shaped portion (4), and a first mounting plate (5), wherein the two ends of the fixing belt (3) are arranged on one side of the bottom of the joint support bracket (2), and the middle portion of the fixing belt (3) is arranged above the joint support bracket (2); The arc-shaped portion (4) is arranged at one end of the joint support bracket (2) away from the fixing belt (3), and first mounting plates (5) are arranged on both sides above the arc-shaped portion (4), and a first through hole is arranged on the first mounting plate (5).

3. A bony mallet finger fixture according to claim 2, characterized in that: Velcro fleece surfaces are provided on the inner sides of both ends of the fixing belt (3), and Velcro hook surfaces corresponding to the Velcro fleece surfaces are provided on the bottom of the joint support bracket (2).

4. A bony mallet finger fixture according to claim 2, characterized in that: The joint support bracket (2) and the arc-shaped portion (4) are provided with soft pads on their upper surfaces.

5. The bony mallet finger fixture according to claim 1, characterized in that: The pressure-applying assembly comprises a bone block fixing needle (6), a fixing needle bolt (7), a needle handle (8), and a second mounting plate (9); the bone block fixing needle (6) is a solid structure; one end of the bone block fixing needle (6) is needle-shaped; the end of the bone block fixing needle (6) away from the needle shape is arranged at one end of the needle handle (8) through the fixing needle bolt (7); the second mounting plate (9) is arranged below the other end of the needle handle (8); and a second through hole corresponding to the first through hole is arranged on the second mounting plate (9).

6. The bony mallet finger fixture according to claim 2, characterized in that: A clamp shaft (10) is provided in the first through hole and the second through hole, and the needle handle (8) is rotatably arranged on the clamp shaft (10) via a second mounting plate (9).

7. The bony mallet finger fixture according to claim 5, characterized in that: A through slot (11) is provided at one end of the needle handle (8) away from the second mounting plate (9), and the bone block fixing needle (6) is arranged in the through slot (11); A threaded hole is provided on one side wall of the through slot (11), a fixing needle bolt (7) is arranged in the threaded hole, and an end of the fixing needle bolt (7) abuts against a side wall of the bone block fixing needle (6).

8. The bony mallet finger fixture according to claim 5, characterized in that: The needle handle (8) and the second mounting plate (9) and the joint support bracket (2) are lever structures, and the needle handle (8) and the second mounting plate (9) are opened and closed with the joint support bracket (2) through an elastic structure.

9. A method for using a bony mallet finger fixture according to any one of claims 1 to 8, characterized in that: The following steps are involved: S1: lift the needle handle (8) and the bone block fixing needle (6), and then place the finger on the joint support (2); S2: Loosen the needle handle (8) to press the bone block fixing needle (6) onto the bone fragment (1); S3: The fixing belt (3) is bonded to the joint support bracket (2) using the Velcro fleece surface and Velcro hook surface.

10. The method for using the bony mallet finger clamp according to claim 9, characterized in that: After S2, the process further includes: adjusting the extension length and angle of the bone block fixing needle (6), and then tightening the fixing needle bolt (7).

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