Bone plate for hallux valgus correction

Abstract

The application discloses a bone plate for hallux valgus correction, comprising an elongated plate body, which comprises a distal end part, a curved part and a proximal tip part along the long axis direction in sequence, a first locking hole and a second locking hole are arranged on the surface of the distal end part, a third locking hole is arranged on the surface of the curved part, and a threading hole is arranged on the side surface of the curved part. The distal end part and the proximal tip part are located in different planes and are connected by the curved part. The bone plate for hallux valgus correction has the advantages of microtrauma, reduced soft tissue damage, good blood circulation, fast wound recovery, and can be selected according to the situation, and different angle bone plates are selected to correct various degrees, and the correction force is high. In addition, the bone plate has the advantages of short required operation time, twice stability of other implants, no protrusion, no foreign body sensation and the like.

Description

Technical Field

[0001] This invention relates to medical device apparatus, particularly a bone plate for correcting hallux valgus. Background Technology

[0002] Hallux valgus is a common condition where the big toe deviates excessively outward from the foot. It typically refers to the big toe shifting more than 15 degrees towards the second toe, causing it to overlap and resulting in misalignment of the second toe. This usually causes discomfort from friction when wearing shoes, and when barefoot, the bone at the base of the big toe may appear prominent, and redness, swelling, and pain are common.

[0003] While ill-fitting shoes play a role in the development of hallux valgus (bunion), the primary cause is likely a defect in the bones that make up the foot. Secondly, prolonged standing and walking can increase ligament damage, prompting the onset of the condition or accelerating its progression. Furthermore, frequently wearing pointed shoes or high heels, with their triangular toes forcing the forefoot into a narrow triangular area, coupled with the inelasticity of the leather upper, forces the big toe to turn outwards while the little toe turns inwards. If there is significant compression of the second toe by the big toe, correction should be sought promptly. Once the symptoms become severe and the pain becomes unbearable, affecting daily life, surgery may be considered to alleviate the pain and discomfort, achieving bone reconstruction and soft tissue balance.

[0004] Hallux valgus correction surgery is quite diverse, mainly consisting of "soft tissue repair" and "osteotomy correction". The former relaxes the tight adductor muscles on the outside and tightens the loose joint capsule and ligaments on the inside; the latter corrects the valgus big toe to the ideal angle.

[0005] When treating hallux valgus surgically, the first metatarsal bone that is turned inward must be corrected to the ideal angle through osteotomy to achieve the desired effect. Currently, there are many surgical methods for correcting hallux valgus. Each osteotomy method has its own advantages and disadvantages. In addition, the internal fixation devices used, such as steel nails and screws, may have problems such as low stability or insufficient corrective force.

[0006] Currently, existing bone screws and plates used in surgical treatment of hallux valgus have some shortcomings in practice. For example, refer to... Figure 4A The existing bone plate 10 for treating hallux valgus shown is implanted into the medullary cavity at the cut section of the first metatarsal 30. The distal end of the bone plate 10 is fixed by only one bone screw 210, which may cause the distal osteotomy of the first metatarsal 30 to rotate relative to the proximal osteotomy after surgery, thus affecting postoperative healing.

[0007] To address the aforementioned deficiencies, it is necessary to provide novel hallux valgus correction implants, such as novel spear-shaped locking plates, which could offer patients better options. Summary of the Invention

[0008] To achieve the above objectives, this invention discloses a bone plate for correcting hallux valgus, comprising: an elongated plate body, which sequentially includes a distal end, a curved portion, and a proximal tip along its long axis; a first locking hole and a second locking hole are provided on the surface of the distal end; a third locking hole is provided on the surface of the curved portion; and a threading hole is provided on the side of the curved portion. The distal end and the proximal tip are located on different planes and are connected by the curved portion.

[0009] In one embodiment, the distal end, the curved portion, and the proximal tip are integrally formed to create a spear-shaped bone plate. The aforementioned threading hole is located on the side of the bone plate between the second and third locking holes, and extends from one side to the other, providing threading through the joint capsule of the big toe to correct hallux valgus (HVA).

[0010] In one embodiment, the inner walls of the first, second, and third locking holes have internal threads and are all threaded holes that penetrate the upper and lower surfaces, providing a gripping force for locking the bone screw. The outer side of the bone screw has continuous external threads that correspond to the internal threads of the inner walls of the first, second, and third locking holes, allowing the external and internal threads to engage with each other.

[0011] In one embodiment, the second locking hole and the first locking hole have a first included angle, the angle of which ranges from 0° to 15°. The third locking hole is an angled locking hole, and the third locking hole and the first locking hole have a second included angle, the angle of which ranges from 0° to 60°.

[0012] In one embodiment, the bone plate for correcting hallux valgus includes a proximal tip of the bone plate inserted through an incision into the medullary cavity of the first metatarsal bone of the big toe for fixation. Furthermore, bone screws are inserted through a first locking hole, a second locking hole, and a third locking hole into the incised first metatarsal bone for fixation. This allows the bone plate to be securely connected to the incised first metatarsal bone via its curved portion and proximal tip, ensuring correct alignment to correct the intermetatarsal angle (IMA) between the first and second metatarsals.

[0013] In one embodiment, the outer edge of the bone plate is designed with a low notch to conform to the curvature of the medullary cavity wall of the first metatarsal, thereby increasing fit when implanted into the medullary cavity.

[0014] The beneficial effects of this invention are as follows:

[0015] (1) Minimal incision, reducing soft tissue damage, good blood circulation, and rapid wound healing; (2) Different angle bone plates can be selected as needed to perform various degrees of correction, with high corrective force; (3) Short surgical time required; (4) Stability is twice that of other implants; (5) Fits snugly without protrusion and without foreign body sensation; (6) Applicable to various correction methods. Three months after surgery, the recovery status can be tracked by X-ray. Once the bone has healed, exercise can begin, such as swimming, cycling, running, and jumping. Attached Figure Description

[0016] Figure 1A This image shows a perspective view of the bone plate disclosed in this invention for correcting hallux valgus.

[0017] Figure 1B This shows a top view of the bone plate for correcting hallux valgus as disclosed in this invention.

[0018] Figure 1C This shows a side view of the bone plate for correcting hallux valgus as disclosed in this invention.

[0019] Figure 2 This invention discloses a bone plate for correcting hallux valgus. Figure 1B A cross-sectional view along the AA direction.

[0020] Figure 3 The top view shows the bone plate disclosed in this invention for correcting hallux valgus after osteotomy, implanted and fixed.

[0021] Figure 4A The side view shown is of an existing corrective bone plate for treating hallux valgus, implanted and fixed after osteotomy.

[0022] Figure 4B The present invention discloses a side view of the bone plate for correcting hallux valgus, which is implanted and fixed after osteotomy.

[0023] The diagram is marked as follows:

[0024] 10a: First included angle

[0025] 20a: Second included angle

[0026] 30: First metatarsal bone

[0027] 10,100: Bone plates

[0028] 101: distal end

[0029] 103: Bending section

[0030] 105: Proximal apex

[0031] 111: First locking hole

[0032] 113: Second locking hole

[0033] 115: Third locking hole

[0034] 117: Threading hole

[0035] 210: Bone screw Detailed Implementation

[0036] This invention will be described in detail here with reference to specific embodiments and their viewpoints. Such descriptions are for illustrative purposes only and are not intended to limit the scope of the invention. Therefore, in addition to the specific and preferred embodiments described in the specification, this invention can be widely implemented in other different embodiments. The following describes the implementation of this invention through specific embodiments, and those skilled in the art can easily understand the effectiveness and advantages of this invention from the content disclosed in this specification. Furthermore, this invention can also be used and implemented through other specific embodiments, and the various details set forth in this specification can be applied based on different needs, and various modifications or changes can be made without departing from the spirit of this invention.

[0037] This invention primarily discloses a bone plate 100 for correcting hallux valgus. Please refer to [link / reference needed]. Figures 1A-1C The images show a perspective view, a top view, and a side view of the aforementioned bone plate 100. The bone plate 100 is an elongated plate, which, along its long axis, sequentially includes a distal end 101, a curved portion 103, and a proximal tip 105 from distal to proximal. The distal end 101 and the proximal tip 105 are located on different planes and are connected by the curved portion 103. The distal end 101, the curved portion 103, and the proximal tip 105 are integrally formed to create a spear-shaped bone plate. Along its long axis, the plate has a first locking hole 111 and a second locking hole 113 on the surface of the distal end, a third locking hole 115 on the surface of the curved portion, and a threading hole 117 on the side of the curved portion.

[0038] According to an embodiment of the present invention, the inner walls of the first locking hole 111, the second locking hole 113, and the third locking hole 115 have internal threads and are all threaded holes that penetrate the upper and lower surfaces, providing a gripping force for locking the bone screw; the threading hole 117 is provided on the side between the second locking hole 113 and the third locking hole 115, and passes through from one side to the other, providing threading for the joint capsule of the big toe to correct the hallux valgus angle (HVA).

[0039] refer to Figure 1A and Figure 1B The outer edge of the aforementioned bone plate 100 is designed with a low notch, which can better conform to the curvature of the medullary cavity wall of the big toe, especially when implanted into the medullary cavity of the first metatarsal bone, it can increase the fit.

[0040] Figure 2 The bone plate 100 is shown along the AA direction (reference). Figure 1B A cross-sectional view of the bone screw 210 shows that each screw 210 can be respectively inserted into a first locking hole 111, a second locking hole 113, and a third locking hole 115 provided on the distal end surface. According to an embodiment of the invention, the outer wall of the screw 210 has continuous external threads that correspond to the internal threads of the inner walls of the first locking hole 111, the second locking hole 113, and the third locking hole 115, allowing the external threads to engage with the internal threads of the inner walls of the first locking hole 111, the second locking hole 113, and the third locking hole 115. According to an embodiment of the invention, the first locking hole 111 is perpendicular to the distal end surface; the second locking hole 113 and the first locking hole 111 have a first included angle 10a with a small angle, ranging from 0° to 15°; the third locking hole 115 is an oblique locking hole, and the third locking hole 115 and the first locking hole 111 have a second included angle 20a, ranging from 0° to 60°.

[0041] refer to Figure 3 When treating hallux valgus surgically, the first metatarsal bone 30 is first cut along the incision direction. The proximal tip 105 of the bone plate 100 is inserted into the medullary cavity of the first metatarsal bone 30 through the cut surface for fixation. A bone screw is then used through the first locking hole 111 (see reference). Figure 1A The first metatarsal 30 is inserted through the second locking hole 113 (refer to Figure 1A) and the third locking hole 115 (refer to Figure 1A) for fixation. This allows the bone plate to securely connect the cut first metatarsals through the curved portion and proximal tip, ensuring proper alignment to correct the intermetatarsal angle (IMA) between the first and second metatarsals. Furthermore, with the assistance of the suture hole 117, sutures can be threaded through the joint capsule to correct the hallux valgus angle (HVA).

[0042] contrast Figure 4A The bone plate 100 disclosed in this invention, in accordance with the prior art, refers to... Figure 4B Because of its design with two screws 210 for locking at the distal end, it can effectively prevent the distal osteotomy of the first metatarsal 30 from rotating relative to the proximal osteotomy after fixation, thus avoiding the problems associated with the bone plate 10 in the prior art. Figure 4A This may result in slow postoperative healing and insufficient stability.

[0043] The above invention is a corrective implant specifically developed for hallux valgus surgery—a spear-shaped next-generation locking bone plate—which patients can choose from. Its advantages include: (1) minimally invasive incision, reduced soft tissue damage, good blood circulation, and rapid wound healing; (2) the ability to select bone plates of different angles to achieve various degrees of correction, with high corrective force; (3) short surgical time; (4) twice the stability of other implants; (5) conforming to the body without protrusion and without foreign body sensation; and (6) applicability to various correction methods. Three months after surgery, the recovery status can be tracked by X-ray. Once the bone has healed, exercise can begin, such as swimming, cycling, running, and jumping.

[0044] The above description represents preferred embodiments of the present invention. Those skilled in the art should understand that it is used to illustrate the invention and not to limit the scope of the patent rights claimed by the invention. The scope of patent protection shall be determined by the appended claims and their equivalents. Any modifications or refinements made by those skilled in the art without departing from the spirit or scope of this patent are equivalent changes or designs made under the spirit disclosed in this invention and should be included within the scope of the following claims.

Claims

1. A bone plate for correcting hallux valgus, characterized in that, include: A long plate, which sequentially includes a distal end, a curved portion and a proximal tip along its long axis; A first locking hole and a second locking hole are provided on the surface of the distal end, a third locking hole is provided on the surface of the curved portion, and a wire hole is provided on the side of the curved portion; and The distal end and the proximal tip are located on different planes and are connected by the curved portion.

2. The bone plate for correcting hallux valgus according to claim 1, characterized in that, The distal end, the curved portion, and the proximal tip are integrally formed to create a spear-shaped bone plate.

3. The bone plate for correcting hallux valgus according to claim 2, characterized in that, The aforementioned threading hole is located on the side of the bone plate between the second locking hole and the third locking hole, and extends from one side to the other, providing threading through the joint capsule of the big toe to correct the hallux valgus angle.

4. The bone plate for correcting hallux valgus according to claim 2, characterized in that, The first locking hole, the second locking hole, and the third locking hole are all threaded holes that penetrate the upper and lower surfaces, providing a gripping force for the bone screw to be locked in place.

5. The bone plate for correcting hallux valgus according to claim 4, characterized in that, The aforementioned bone screw is engaged with the first locking hole, the second locking hole, and the third locking hole.

6. The bone plate for correcting hallux valgus according to claim 4, characterized in that, The second locking hole and the first locking hole have a first included angle, the angle range of which is 0° to 15°.

7. The bone plate for correcting hallux valgus according to claim 4, characterized in that, The third locking hole is an angled locking hole, and there is a second included angle between the third locking hole and the first locking hole, with the angle range being 0° to 60°.

8. The bone plate for correcting hallux valgus according to claim 4, characterized in that, The bone plate is inserted through an incision into the medullary cavity of the first metatarsal bone of the big toe for fixation.

9. The bone plate for correcting hallux valgus according to claim 8, characterized in that, The method involves inserting the bone screw into the cut first metatarsal bone for fixation, such that the bone plate is connected to the cut first metatarsal bone via the curved portion and the proximal tip.

10. The bone plate for correcting hallux valgus according to claim 9, characterized in that, The outer edge of the aforementioned bone plate is designed with a low notch to conform to the curvature of the medullary cavity wall of the first metatarsal, thereby increasing fit when implanted into the medullary cavity.

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