A hammer toe treatment device

Abstract

This application discloses a treatment device for hammer toe, comprising a fixing screw and a tendon extension plate. The fixing screw includes a head and a body, the body having external threads for screwing into the phalanx; the tendon extension plate has a positioning hole in its center, through which the fixing screw can pass to move the tendon extension plate toward the phalanx, so that the tendon follows the tendon extension plate closer to the phalanx, thereby achieving tendon lengthening. This device uses internal fixation, locking the screw into the affected area of ​​hammer toe and fixing the tendon extension plate thereon. The screw's insertion causes the tendon extension plate to stretch and relax the atrophied tendon from its original taut state toward the phalanx, thus promoting hammer toe extension and ultimately treating hammer toe. Furthermore, after fixation, the screw is completely inside the hammer toe and not exposed to the skin tissue, thus avoiding skin irritation, reducing inflammation, and improving patient comfort.

Description

Technical Field

[0001] This application belongs to the field of medical devices for correcting foot deformities, and particularly relates to a device for treating hammer toe surgery. Specifically, it is a treatment device for hammer toe. Background Technology

[0002] Hammer toe deformity is a common foot deformity that primarily occurs at the proximal interphalangeal joint of the toes. It is caused by an imbalance between the muscles and tendons that control toe movement, specifically by atrophy of the relevant tendons leading to a chronically over-flexed state of the proximal interphalangeal joint. As the deformity progresses, the toes affected by tendon atrophy may experience joint stiffness, persistent pain, and even difficulty walking, severely impacting the patient's daily life.

[0003] Currently, treatment for hammer toe deformity is divided into non-surgical and surgical methods. Non-surgical treatment is suitable for patients with mild symptoms and includes wearing appropriate footwear to reduce local pressure on the toes, using orthotic insoles or braces for passive correction, or targeted exercises to strengthen and stretch the affected muscles. For more severe cases, surgical options such as tendon transfer and arthroplasty are generally used. However, both of these surgical options have significant drawbacks. Specifically, tendon transfer involves rerouting and reattaching the tendon, which can lead to instability during walking, and there is a possibility of recurrence of hammer toe after surgery. Arthroplasty, as an internal fixation procedure, usually uses Kirschner wires to fix the hammer toe, but Kirschner wires have low fixation strength, poor stability, and are prone to rotational displacement. Furthermore, the exposed Kirschner wire tips can easily irritate surrounding tissues, leading to inflammatory reactions.

[0004] Therefore, there is an urgent need for a treatment device for hammer toe surgery. This device should not only effectively treat hammer toe and prevent postoperative recurrence, but also minimize irritation to the skin tissue and reduce inflammatory response. Utility Model Content

[0005] Analysis of the above problems reveals that existing surgical methods for treating severe hammer toe have the following two drawbacks: First, changing the attachment position of the tendon can easily lead to postoperative complications such as difficulty walking; second, the use of Kirschner wire fixation is prone to rotational displacement or even dislodgement due to its poor fixation strength, and the exposure of the Kirschner wire tip in the skin tissue can also cause local tissue irritation.

[0006] To address the aforementioned problems, this application discloses a treatment device for hammer toe. The device employs internal fixation, where a screw is inserted at the site of the hammer toe, and a tendon extension plate is fixed therein. The screw's insertion causes the tendon extension plate to stretch and relax the atrophied tendon from its taut state towards the phalanx, thereby promoting the extension of the hammer toe and ultimately achieving the therapeutic goal. Furthermore, after fixation, the screw is completely embedded within the hammer toe and not exposed to the skin tissue, thus avoiding skin irritation, reducing inflammation, and improving patient comfort.

[0007] To achieve the above objectives, the specific technical solution of this application is a treatment device for hammer toe, comprising a fixing screw, a tendon extension plate, a clamping plate, and a pair of needles and sutures. The fixing screw has a guide hole extending through it axially. The fixing screw includes a head and a body, the body having external threads for screwing into the phalanx. The head has a pair of oppositely arranged fixing holes, each communicating with the guide hole. The tendon extension plate has a positioning hole in its center, through which the fixing screw can pass to move the tendon extension plate towards the phalanx, so that the tendon follows the tendon extension plate closer to the phalanx, thereby achieving tendon lengthening. The clamping plate is located on the side of the phalanx opposite to the tendon extension plate. The clamping plate has a pair of slots; a pair of needle-threads pass through the guide holes from the fixing holes and exit from the port of the guide hole on the side where the nail head is located, so as to fix each needle-thread to the nail head. Each needle-thread then passes through the port of the guide hole on the side where the nail head is located and exits from the port of the other end of the guide hole. Each needle-thread is wrapped around each other through the slots of the clamping plate to fix the clamping plate to the metatarsal bone, so that the tendon extension plate and the clamping plate can approach each other to clamp the hammer toe and maintain the positional stability of the tendon extension plate and the metatarsal bone.

[0008] Furthermore, the head of the fixing screw has a connecting groove, which is used for an external locking device to fix the fixing screw inside the toe.

[0009] Furthermore, the tendon extension plate has a wavy pattern on one side of the toe bone; the clamping plate also has a wavy pattern on one side of the toe bone.

[0010] Furthermore, the clamping plate is an H-shaped clamping plate.

[0011] Furthermore, the clamping plate is an arc-shaped clamping plate, which curves towards the toe bones, so that the arc-shaped clamping plate fits and fixes the toe bones.

[0012] Furthermore, the length of the fixing screw ranges from 2mm to 10mm, and the diameter of the screw body ranges from 1.5mm to 2mm.

[0013] Furthermore, the end of the nail body is equipped with a self-tapping and self-drilling tip.

[0014] Furthermore, the thickness of the tendon extension plate ranges from 2mm to 3mm; the thickness of the clamping plate ranges from 2mm to 3mm.

[0015] Beneficial effects:

[0016] This device works by inserting a fixation screw from one side of the metatarsal bone to the other at the site of hammer toe, while simultaneously using a tendon extension plate to support the screw insertion and provide stable support to the underside of the metatarsal bone. During screw insertion, the tendon extension plate moves towards the metatarsal bone, causing the tendon to align with the bone and achieve a stretching effect. Maintaining this state over time allows the atrophied tendon to gradually recover its original length, enabling toe extension and ultimately treating hammer toe. Furthermore, the screw's body is entirely locked inside the hammer toe, with its tip not exposed in the skin tissue, minimizing irritation and inflammation during fixation. The cooperation between the screw and the tendon extension plate effectively prevents screw rotation and dislodgement, significantly enhancing fixation strength and stability. The positioning holes in the tendon extension plate guide the screw insertion during surgery.

[0017] The device also includes a pair of sutures and a clamping plate. The tendon extension plate is positioned on one side of the patient's phalanx, while the clamping plate is positioned on the other side. One end of each suture is fixed to the tendon extension plate, and the other end to the clamping plate. Tightening the sutures brings the two plates closer together, thus clamping the hammer toe between them. Under the clamping action of the two plates, the atrophied tendon is stretched, allowing the hammer toe to gradually extend. Furthermore, since the fixation screws are only located inside the hammer toe, the fixation strength of the tendon extension plate alone on one side of the phalanx may be insufficient. Therefore, the clamping plate also serves as an auxiliary fixation device, maintaining the positional stability of the tendon extension plate relative to the phalanx and preventing the tendon extension plate from detaching from the phalanx, which could lead to postoperative recovery failure.

[0018] The device features a guide hole through the fixing screw and a fixing hole at the screw head, with a corresponding slot on the clamping plate. During surgery, a pair of sutures, guided by a needle, first pass through the positioning hole in the screw head, securing one end of the suture to the tendon extension plate. The needle continues to guide the suture through the hole in the fixing screw and exits from the other side of the metatarsal bone. The suture is then wrapped around the slot of the clamping plate and secured, thus achieving a stable fixation of the clamping plate on the other side of the metatarsal bone. This design, where the sutures are inserted into the fixing screw and exit from the other side of the metatarsal bone, hides the sutures inside the fixing screw, effectively reducing the patient's foreign body sensation and minimizing suture irritation to the skin tissue.

[0019] The wavy texture of the tendon extension plate and clamping plate increases the friction between them and the surface of the toe bones, thereby enhancing the fixation ability of the tendon extension plate and clamping plate and improving the stability of the fixation.

[0020] The purpose of setting the clamping plate as an arc-shaped clamping plate is to make it fit the physiological and anatomical curvature of the toe bones better, thereby improving the fit between the clamping plate and the toe bones and making the fixation more secure.

[0021] The purpose of setting a self-tapping and self-drilling tip at the end of the screw body is to facilitate the smooth locking of the screw into the toe bone.

[0022] The following description, in a clear and understandable manner and with reference to the accompanying drawings, will further illustrate the above-mentioned characteristics, technical features, advantages, and implementation methods of a treatment device for hammer toe. Attached Figure Description

[0023] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0024] Figure 1 An exploded view illustrating an illustrative embodiment of a treatment device for hammer toe.

[0025] Figure 2 yes Figure 1 A schematic diagram of the combined state of a treatment device for hammer toe is shown.

[0026] Figure 3 A schematic diagram illustrating the use of a treatment device for hammer toe.

[0027] Figure 4 A structural diagram illustrating another use of a treatment device for hammer toe.

[0028] Figure 5 A structural diagram illustrating another usage process of a treatment device for hammer toe.

[0029] Figure 6 This is a schematic diagram illustrating the structure of a treatment device for hammer toe after use.

[0030] Figure 7 This is a structural diagram illustrating the use of a treatment device for hammer toe in hammer toe.

[0031] Label Explanation

[0032] 10. Fixing screw; 12. Screw body; 122. Self-drilling tip; 14. Screw head; 142. Connecting groove; 144. Fixing hole; 16. Guide hole; 20. Tendon extension plate; 22. Positioning hole; 30. Clamping plate; 32. Slot; 60. Needle; 70. With needle and thread; 80. Toe bone. Detailed Implementation

[0033] To provide a clearer understanding of the technical features, objectives, and effects of this application, specific embodiments of this application are now described with reference to the accompanying drawings. In the drawings, the same reference numerals indicate components with the same or similar structures but the same function.

[0034] In this document, “illustrative” means “serving as an example, illustration or description”, and any illustration or implementation described herein as “illustrative” should not be construed as a more preferred or advantageous technical solution.

[0035] like Figure 1 As shown, a treatment device for hammer toe includes a fixation screw 10 and a tendon extension plate 20. The fixation screw 10 includes a screw body 12 and a screw head 14. The screw body 12 has external threads on its outer side for screwing into the phalanx. The end of the fixation screw 10 also has a self-tapping drill tip 122. The screw head 14 has a connecting groove 142 for connecting a locking device. Through the locking device, in conjunction with the self-tapping drill tip 122 of the screw body 12, the screw body 12 of the fixation screw 10 can be locked into and fixed inside the hammer toe. The end of the screw body 12 will not protrude from the hammer toe, which can minimize skin tissue irritation and reduce the occurrence of inflammation. In actual production design, the fixation screw 10 can be made of titanium alloy.

[0036] A positioning hole 22 is provided in the middle of the tendon extension plate 20. In actual use, such as... Figure 2 As shown, the fixation screw 10 is first passed through the positioning hole 22 of the tendon extension plate 20, and then locked into the hammer toe, thereby fixing the tendon extension plate 20 to one side of the toe bone to further strengthen the fixation of the hammer toe joint. In addition, the tendon extension plate 20 can also provide support for the locking of the fixation screw 10. The cooperation between the two can effectively prevent the fixation screw from rotating out, significantly enhancing the stability of the fixation.

[0037] The treatment principle of this hammer toe treatment device is as follows: Hammer toe is usually associated with atrophy and shortening of the tendons on the bottom of the toes. The atrophied tendons pull the bones at both ends of the toe joint closer together, causing the joint to bulge, the toes to flex and be unable to extend, and affecting the patient's walking. During the locking process of the device's fixing screw 10 into the toe bone, it can move the tendon extension plate 20 towards the toe bone. The tendon, along with the tendon extension plate 20, becomes closer to the toe bone. Under long-term fixation, the tendon is stretched and lengthened, thereby restoring the extension of the toe bone and the flexed toe, achieving the therapeutic goal.

[0038] like Figure 1 , Figure 2 As shown, a treatment device for hammer toe also includes a pair of sutures 70 and a clamping plate 30. One end of the sutures 70 is fixed to a fixing screw 10 and passes through the metatarsal bone to the other side of the metatarsal bone. The other end is connected to the clamping plate 30, thereby fixing the clamping plate 30 to the other side of the metatarsal bone. At this time, the tendon extension plate 20 is fixed to one side of the metatarsal bone, and the clamping plate 30 is fixed to the other side of the metatarsal bone by the traction of the sutures 70. The two are connected by the sutures 70 and close to each other, presenting a state of clamping the hammer toe. In actual production design, the sutures 70 are type 06 non-absorbable surgical sutures, and the needles are pointed round needles made of stainless steel. The clamping plate 30 is designed to increase the fixation strength of the fixing screw 10 and the tendon extension plate 20, thus playing an auxiliary fixation role, maintaining the positional stability of the tendon extension plate 20 and the toe bone, and avoiding postoperative recovery failure. On the other hand, under the clamping action of the tendon extension plate 20 and the clamping plate 30, the tendon is further extended, and the internal fixation treatment for hammer toe is strengthened.

[0039] In one illustrative embodiment of a treatment device for hammer toe, such as Figure 1 , Figure 2 , Figure 3 As shown, the fixing screw 10 has a guide hole 16 extending through it along its axial direction, and the screw head 14 of the fixing screw 10 has a pair of oppositely arranged fixing holes 144. Figure 3 As shown, each fixing hole 144 is connected to the guide hole 16. In actual use, a pair of needle-threaded sutures 70 can pass through their respective corresponding fixing holes 144 to fix one end to the tendon extension plate 20. Furthermore, as... Figure 1As shown, the clamping plate 30 has a pair of slots 32. Specifically, the clamping plate 30 can be H-shaped. During use, the operator can continue to insert and exit a pair of needle-like threads 70 along the guide hole 16. Each needle-like thread 70 exiting the guide hole 16 can pass through its corresponding slot 32 of the clamping plate 30, thereby wrapping around the clamping plate 30 and fixing the clamping plate 30 to the toe bone. The slots 32 facilitate the use of the needle-like threads 70 to fix the clamping plate 30. This method of using the needle-like threads 70 and the fixing screw 10, compared to leaving the sutures in the skin tissue, allows the needle-like threads 70 to be hidden in the guide hole 16 of the fixing screw 10, effectively reducing the patient's foreign body sensation and reducing suture irritation to the skin tissue. Specifically, the use of a treatment device for hammer toe is described in detail below.

[0040] In one illustrative embodiment of the tendon extension plate 20 and the clamping plate 30, such as Figure 1 As shown, both the tendon extension plate 20 and the clamping plate 30 have wavy patterns on the side that fits against the toes. The wavy patterns increase the friction between the two plates and the surface of the toe bones, thereby enhancing the fixation ability of the tendon extension plate 20 and the clamping plate 30 and improving the stability of the fixation.

[0041] In another illustrative embodiment of the clamping plate 30, the clamping plate 30 is an arc-shaped clamping plate that bends toward the dorsal side of the toe bone to conform to the physiological anatomical curvature of the toe bone, so that the arc-shaped clamping plate fits against the dorsal side of the toe bone for fixation.

[0042] In one illustrative embodiment of the fixation screw 10, the length of the fixation screw 10 ranges from 2mm to 10mm, ensuring that it can be firmly fixed within the metatarsal bone, but the screw body 12 will not protrude from the metatarsal bone. The diameter of the screw body 12 ranges from 1.5mm to 2mm. Of course, fixation screws 10 of different lengths and diameters can be selected according to actual clinical needs.

[0043] In one illustrative embodiment of the tendon extension plate 20, both the tendon extension plate 20 and the clamping plate 30 have a thickness ranging from 2 mm to 3 mm. Within this range, the irritation of the two plates to the patient's skin tissue is reduced.

[0044] The specific usage process of a treatment device for hammer toe is as follows:

[0045] Before the surgery begins, the hammer toe bone surface is first exposed. (As...) Figure 3 As shown, the thread 70 with needle is first inserted through the fixing hole 144 of the fixing screw 10 into the guide hole 16 under the guidance of the needle 60. Then, it is passed out through the end of the guide hole 16 on the side of the nail head 14 and knotted to ensure that the thread 70 with needle is firmly fixed to the nail head 14.

[0046] like Figure 4 As shown, the needle-thread 70 is inserted into the guide hole 16, and the needle 60 is hidden in the guide hole 16. Then, the locking device is connected to the connecting slot of the fixing screw 10, so that the fixing screw 10 passes through the positioning hole 22 of the tendon extension plate 20, and finally the fixing screw 10 and the tendon extension plate 20 are fixed together to the bottom of the patient's toe bone.

[0047] After locking is complete, as follows Figure 4 , Figure 5 , Figure 6 As shown, an external tool is used to push the needle-lined thread 70 through the guide hole 16. Guided by the needle 60, the needle-lined thread 70 passes through the slot 32 of the clamping plate 30 and wraps around to the top of the clamping plate 30. The two needle-lined threads 70 meet and wrap around each other at the top of the clamping plate 30, thereby fixing the clamping plate 30 to the back of the patient's foot bone.

[0048] Figure 7 The diagram shown illustrates the device after use. The fixing screw 10 is locked into the toe bone. The tendon extension plate 20 and the clamping plate 30 clamp the toe bone, and are brought close together and clamped by the connection of the needle and thread 70, ensuring that the two plates do not detach. The tendon on the underside of the toe bone is stretched towards the direction of the toe bone. With long-term treatment, the tendon is stretched, and the toe bone will return to normal.

[0049] To keep the drawings concise, only the parts relevant to this application are shown schematically in each drawing, and they do not represent the actual structure of the product. In addition, to make the drawings concise and easy to understand, in some drawings, only one of the components with the same structure or function is shown schematically, or only one of them is labeled.

[0050] It should be understood that although this specification describes various embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0051] The detailed descriptions listed above are merely specific descriptions of feasible embodiments of this application and are not intended to limit the scope of protection of this application. All equivalent implementations or modifications made without departing from the spirit of the art of this application, such as combinations, divisions or repetitions of features, should be included within the scope of protection of this application.

Claims

1. A treatment device for hammer toe, characterized in that, It includes: A fixing screw has a guide hole extending through it along its axial direction. The fixing screw includes a head and a body. The body has external threads for screwing into the toe bone. The head has a pair of fixing holes arranged opposite to each other, and each fixing hole communicates with the guide hole. The tendon extension plate has a positioning hole in its middle. The fixing screw can pass through the positioning hole to drive the tendon extension plate to move toward the metatarsal bone, so that the tendon moves closer to the metatarsal bone with the tendon extension plate, thereby achieving the purpose of tendon lengthening. A clamping plate is disposed on one side of the toe bone relative to the tendon extension plate, and the clamping plate has a pair of slots; A pair of needle-threads are inserted into the guide hole from each of the fixing holes and exit from the port of the guide hole on the side where the nail head is located, so as to fix each of the needle-threads to the nail head. Each of the needle-threads then enters from the port of the guide hole on the side where the nail head is located and exits from the port of the other end of the guide hole. Each of the needle-threads is wrapped around each other through the slots of the clamping plate to fix the clamping plate to the metatarsal bone, so that the tendon extension plate and the clamping plate can be brought close to each other to clamp the hammer toe and maintain the positional stability of the tendon extension plate and the metatarsal bone.

2. The treatment device for hammer toe according to claim 1, characterized in that, The fixing screw has a connecting groove in its head, which is used for an external locking device to fix the fixing screw inside the toe.

3. The treatment device for hammer toe according to claim 1, characterized in that, The tendon extension plate is fitted to one side of the toe bone and has a wavy pattern. The clamping plate, which fits against one side of the toe bone, is provided with a wavy pattern.

4. The treatment device for hammer toe according to claim 1, characterized in that, The clamping plate is an H-type clamping plate.

5. The treatment device for hammer toe according to claim 4, characterized in that, The clamping plate is an arc-shaped clamping plate, which bends toward the toe bone so that the arc-shaped clamping plate fits and fixes the toe bone.

6. The treatment device for hammer toe according to claim 1, characterized in that, The length of the fixing screw ranges from 2mm to 10mm, and the diameter of the screw body ranges from 1.5mm to 2mm.

7. The treatment device for hammer toe according to claim 1, characterized in that, The end of the nail body is provided with a self-tapping and self-drilling tip.

8. The treatment device for hammer toe according to claim 1, characterized in that, The thickness of the tendon extension plate ranges from 2mm to 3mm, and the thickness of the clamping plate ranges from 2mm to 3mm.

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