A foot hallux valgus osteotomy guide

Abstract

The present application belongs to the field of minimally invasive correction of hallux valgus, and specifically discloses a foot hallux valgus osteotomy guide plate, which comprises an osteotomy pre-guide plate and an osteotomy post-guide plate; the osteotomy pre-guide plate comprises a guide plate body, a distal end, a proximal end, a metatarsal bone distal end positioning needle guide column hole, an osteotomy groove, and a wedge bone positioning needle guide column hole; the osteotomy post-guide plate comprises a guide plate body, a distal end, a proximal end, a metatarsal bone distal end fixing clamp, a metatarsal bone distal end positioning needle guide column hole, an osteotomy post-fixed screw guide nail channel, and a wedge bone positioning needle guide column hole. Compared with the prior art, the osteotomy line position obtained when the osteotomy pre-guide plate is used is the preoperative accurate planning direction, and the osteotomy pre-guide plate has small trauma and high accuracy; the osteotomy post-guide plate can be used to screw fix the metatarsal bone distal end along the preoperative planning position after the osteotomy is completed, the operation process is minimally invasive, and the consistency and accuracy of the positions before and after the osteotomy are ensured, the process of repeated adjustment and perspective is avoided, the operation time is saved, and the radiation exposure is reduced.

Description

Technical Field

[0001] This invention relates to the field of instruments for minimally invasive correction of hallux valgus, and in particular to a hallux valgus osteotomy guide plate. Background Technology

[0002] Hallux valgus is a common forefoot deformity that severely affects foot function and appearance, reducing quality of life. Minimally invasive hallux valgus correction surgery is increasingly accepted by patients due to its advantages of minimal trauma and rapid postoperative recovery, becoming the mainstream treatment for hallux valgus.

[0003] The main steps of minimally invasive hallux valgus correction surgery involve osteotomy, repositioning, and internal fixation of the metatarsal bone of the patient's big toe using minimally invasive surgical instruments under the guidance of X-ray fluoroscopy. However, this correction surgery has drawbacks, including a small operating space and limited field of vision, making it difficult for doctors to accurately locate and perform the osteotomy. Repeated trial and error, verification, and adjustments are required during the surgery, increasing the difficulty and time of the operation, extending the doctor's fluoroscopy time, increasing the patient's discomfort, and reducing the efficiency and effectiveness of the correction surgery. Summary of the Invention

[0004] To address the aforementioned technical problems, this invention provides a hallux valgus osteotomy guide plate.

[0005] To achieve the above objectives, the present invention is implemented according to the following technical solution:

[0006] A guide plate for hallux valgus osteotomy, comprising a guide plate for pre-osteotomy and a guide plate for post-osteotomy;

[0007] The pre-osteotomy guide plate includes a back side that matches the medial side of the big toe and a front side that is opposite to the back side and faces away from the medial side of the big toe. It is used to match and engage the medial side of the big toe and includes a distal end and a proximal end that are arranged opposite to each other. The distal top of the pre-osteotomy guide plate body is provided with a metatarsal distal positioning pin guide post hole, the rear end of the metatarsal distal positioning pin guide post hole is provided with an osteotomy groove, and one side of the guide plate body at the rear end of the osteotomy groove is provided with a cuneiform positioning pin guide post hole.

[0008] The post-osteotomy guide plate includes a back surface that matches the medial side of the big toe and a front surface that faces away from the medial side of the big toe. It is used to match and engage the medial side of the big toe and includes a distal end and a proximal end arranged opposite to each other. The distal end is provided with a distal metatarsal fixation clip. A support platform is provided on one side of the distal metatarsal fixation clip. The support platform is provided with a groove for the distal metatarsal positioning pin after osteotomy. The post-osteotomy guide plate body at the rear end of the distal metatarsal fixation clip is provided with an inclined guide post hole for the post-osteotomy fixation screw. A wedge positioning pin guide post hole is provided on one side of the guide plate body at the rear end of the guide post hole for the post-osteotomy fixation screw.

[0009] Furthermore, the angle between the guide post hole of the distal positioning pin of the pre-osteotomy metatarsal and the guide post hole of the distal positioning pin of the post-osteotomy metatarsal is 0-90°.

[0010] Preferably, the positioning pin is a Kirschner wire.

[0011] Compared with existing technologies, the pre-osteotomy guide plate of this invention, 3D printed according to the matching foot shape, is placed on the medial side of the foot along the body surface landmarks and foot shape, so that the heel, dorsum, medial side and sole of the foot fit the guide plate. Kirschner wires are inserted through the guide pin holes to fix the guide plate, and Kirschner wires are inserted through the guide pin holes of the distal metatarsal to fix the distal metatarsal. The osteotomy groove of the positioning guide plate is designed according to the hallux valgus angle before surgery. After the guide plate is fixed and fitted, osteotomy is performed along the osteotomy groove, thus completing the precise minimally invasive osteotomy under the guidance plate. The osteotomy line position obtained at this time is the pre-planned direction, with less trauma and high accuracy.

[0012] After osteotomy, a 3D-printed guide plate, tailored to the matching foot shape, is placed on the medial side of the foot along surface landmarks and foot shape, ensuring the heel, dorsum, medial side, and sole conform to the guide plate. Kirschner wires, inserted through the guide pin holes of the pre-osteotomy guide plate, pass through the guide pin holes of the post-osteotomy guide plate, ensuring consistent and accurate positioning of the guide plates before and after osteotomy. The distal metatarsal bone fragment is fixed with a distal metatarsal positioning pin, undergoing 3D rotation and lateral displacement, placing the positioning pin on the support platform and within its slot. This completes the pre-planned distal osteotomy rotation and lateral displacement process, restoring the distal metatarsal to a horizontal position and correcting hallux valgus. After rotation and lateral displacement, screw guide pins are inserted through the screw guide pin holes of the post-osteotomy guide plate, and fixing screws are sequentially screwed in along the guide pins to secure both ends of the metatarsal osteotomy. At this point, the purpose of fixing the distal metatarsal bone with screws at the preoperative planned position after osteotomy is achieved. This procedure is minimally invasive and ensures consistent and accurate positioning before and after osteotomy, avoiding the process of repeatedly adjusting fluoroscopy, saving surgical time and reducing radiation exposure. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the pre-osteotomy guide plate of the present invention.

[0014] Figure 2 This is a diagram showing the usage state of the pre-osteotomy guide plate of the present invention.

[0015] Figure 3 This is a schematic diagram of the guide plate used after osteotomy according to the present invention.

[0016] Figure 4 This is a diagram showing the usage state of the guide plate after osteotomy according to the present invention. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to embodiments. The specific embodiments described herein are for illustrative purposes only and are not intended to limit the invention.

[0018] Example 1

[0019] like Figure 1 The diagram shows a hallux valgus osteotomy guide plate, which is a pre-osteotomy guide plate. The pre-osteotomy guide plate includes a pre-osteotomy guide plate body 10 that matches the dorsal side of the medial side of the big toe and a frontal side opposite to and facing away from the medial side of the big toe. It is used to match and engage the medial side of the big toe and includes a distal and proximal end arranged opposite to each other. The distal top of the pre-osteotomy guide plate body 10 is provided with a pre-osteotomy distal metatarsal positioning pin guide post hole 1, into which a Kirschner wire is inserted, parallel to the transverse axis of the metatarsal bone and the horizontal position of the sesamoid bone at the base. An osteotomy groove 2 is provided at the rear end of the pre-osteotomy distal metatarsal positioning pin guide post hole 1, and a cuneiform positioning pin guide post hole 3 is provided on one side of the guide plate body at the rear end of the osteotomy groove 2. The preferred positioning pin used is a Kirschner wire.

[0020] like Figure 2 As shown, during use, the 3D-printed osteotomy guide plate, designed to match the foot's shape, is placed on the medial side of the foot along the surface landmarks and foot shape, ensuring the heel, dorsum, medial side, and sole adhere to the guide plate. Kirschner wires are inserted through the guide pin holes 3 to fix the guide plate, and Kirschner wires are inserted through the distal metatarsal guide pin holes 1 to fix the distal metatarsal. The osteotomy groove 2 of the guide plate is designed preoperatively based on the hallux valgus angle. After the guide plate is fixed and adhered, osteotomy is performed along the groove 2, thus completing the precise minimally invasive osteotomy assisted by the guide plate. The obtained osteotomy line position is precisely planned preoperatively, with minimal trauma and high accuracy.

[0021] Example 2

[0022] like Figure 3The diagram illustrates a hallux valgus osteotomy guide plate, which is a post-osteotomy guide plate. The post-osteotomy guide plate includes a back surface that matches the medial side of the big toe and a front surface opposite the back surface and facing away from the medial side of the big toe. It is used to mate and join the medial side of the big toe and includes a distal end and a proximal end arranged opposite to each other. The distal end is provided with a distal metatarsal fixation clip 4. A support platform 5 is provided on one side of the distal metatarsal fixation clip 4, and the support platform 5 is provided with a post-osteotomy distal metatarsal positioning pin slot 6. The post-osteotomy distal metatarsal positioning pin slot 6 is used for inserting... After inserting the Kirschner wire, the original positioning pin rotates and moves laterally after osteotomy, remaining parallel to the horizontal plane. It is then placed in the distal metatarsal positioning pin slot 6 according to the preoperative position, providing precise 3D correction and correcting the preoperative rotation of the distal metatarsal. The guide plate body 11 at the rear end of the distal metatarsal fixation clip 4 is provided with two parallel guide pin holes 7 for post-osteotomy fixation screws. The guide pin hole 3 for wedge positioning pins is provided on one side of the post-osteotomy guide plate body 11 at the rear end of the guide pin hole 7 for post-osteotomy fixation screws.

[0023] like Figure 4 As shown, during use, the 3D-printed osteotomy guide plate, designed to match the foot's shape, is placed on the medial side of the foot along the surface landmarks and foot shape, ensuring that the heel, dorsum, medial side, and sole conform to the guide plate. Kirschner wires, inserted through the guide pin guide post hole 3 of the pre-osteotomy guide plate, pass through the guide pin guide post hole 3 of the post-osteotomy guide plate, ensuring the consistent and accurate positioning of the pre- and post-osteotomy guide plates. The distal metatarsal positioning pin fixes the distal metatarsal bone fragment, performing 3D rotation and lateral movement, placing the positioning pin on the support platform 5 and within its positioning pin slot 6. This completes the pre-operatively planned distal osteotomy rotation and lateral movement process, achieving the effect of restoring the distal metatarsal to a horizontal position and correcting hallux valgus. After rotation and lateral movement, screw guide pins are inserted through the screw guide post hole 7 of the post-osteotomy guide plate, and fixing screws are sequentially screwed in along the guide pins to fix both ends of the metatarsal osteotomy. At this point, the purpose of fixing the distal metatarsal bone with screws at the preoperative planned position after osteotomy is achieved. This procedure is minimally invasive and ensures consistent and accurate positioning before and after osteotomy, avoiding the process of repeatedly adjusting fluoroscopy, saving surgical time and reducing radiation exposure.

[0024] The technical solutions of the present invention are not limited to the specific embodiments described above. Any technical modifications made in accordance with the technical solutions of the present invention fall within the protection scope of the present invention.

Claims

1. A guide plate for hallux valgus osteotomy, characterized in that, This includes pre-osteotomy guides and post-osteotomy guides; The pre-osteotomy guide plate includes a back side that matches the medial side of the big toe and a front side that is opposite to the back side and faces away from the medial side of the big toe. It is used to match and engage the medial side of the big toe and includes a distal end and a proximal end that are arranged opposite to each other. The distal top of the pre-osteotomy guide plate body is provided with a metatarsal distal positioning pin guide post hole, the rear end of the metatarsal distal positioning pin guide post hole is provided with an osteotomy groove, and one side of the guide plate body at the rear end of the osteotomy groove is provided with a cuneiform positioning pin guide post hole. The post-osteotomy guide plate includes a back surface that matches the medial side of the big toe and a front surface that faces away from the medial side of the big toe. It is used to match and engage the medial side of the big toe and includes a distal end and a proximal end arranged opposite to each other. The distal end is provided with a distal metatarsal fixation clip. A support platform is provided on one side of the distal metatarsal fixation clip. The support platform is provided with a groove for the distal metatarsal positioning pin after osteotomy. The post-osteotomy guide plate body at the rear end of the distal metatarsal fixation clip is provided with an inclined guide post hole for the post-osteotomy fixation screw. A wedge positioning pin guide post hole is provided on one side of the guide plate body at the rear end of the guide post hole for the post-osteotomy fixation screw.

2. The hallux valgus osteotomy guide plate according to claim 1, characterized in that: The angle between the guide post hole of the distal positioning pin of the pre-osteotomy metatarsal and the guide post hole of the distal positioning pin of the post-osteotomy metatarsal is 0-90°.

3. The hallux valgus osteotomy guide plate according to claim 1, characterized in that: The positioning needle is a Kirschner wire.

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