3D printed individualized hto intraoperative quick release distractor

Abstract

The present application relates to a kind of 3D printing individualized HTO operation quick disassembly spreader, belong to HTO osteotomy technical field, including multiple block and be used to lock the lock pin for the combination of the block of adoption lock catch structure to form wedge-shaped pad Multiple blocks are locked.The present application is split by the combination structure of multiple blocks Pad is detachable, easy to take out after surgery is completed, and does not need to be destroyed to take out, to avoid the pollution risk of internal non-sterile fragment, and be combined by lock catch structure, locked by lock pin, form the overall wedge-shaped pad, to ensure the accurate correction of lower limb force line, safety and portability are significantly improved.

Description

Technical Field

[0001] The present invention relates to the technical field of HTO osteotomy, and in particular to a 3D-printed individualized quick-release distractor for HTO surgery. Background Art

[0002] HTO osteotomy is used to correct knee varus and valgus. It corrects the force alignment of the lower limb by severing the tibia (incompletely, leaving a hinge) and then distracting it to a certain angle. The precision of the correction angle is crucial to this procedure. Conventional angle positioning uses metal clamps to achieve a preset distraction angle, followed by a fixed plate to stabilize the distraction angle.

[0003] However, the precision of metal forceps for opening the bone is limited, so existing technology has begun to use 3D-printed spacers. 3D-printed spacers are precisely designed based on the patient's knee joint model during preoperative planning. They have a very high degree of fit, improve surgical precision, and are quickly and efficiently manufactured, resulting in high acceptance. However, the 3D-printed spacer adopts an integral structure. After the steel plate is fixed, there is a large area of ​​contact between the spacer and the bone, which generates a large bonding force. Therefore, the spacer cannot be removed as a whole. The only method is to break the spacer into multiple fragments and remove them separately. However, during preoperative disinfection, only the external part of the spacer is disinfected, not the internal part. Therefore, after destruction, there is a high risk of contamination of the osteotomy area by contaminants. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to propose a 3D printed personalized HTO intraoperative quick-release distractor, which adopts a split structure and can be safely and contaminant-free separated from the osteotomy area to solve the problem of contamination of the osteotomy area in the existing technology.

[0005] The present invention is achieved through the following technical solutions:

[0006] A 3D-printed individualized HTO intraoperative quick-release spacer comprises a plurality of blocks combined with a locking structure to form a wedge-shaped pad and a locking pin for locking the plurality of blocks.

[0007] Furthermore, the blocks include a lower left block, an upper left block, an upper right block and a lower right block.

[0008] Furthermore, the locking structure includes a first protrusion arranged on the upper right block and a first groove arranged on the upper left block to cooperate with the first protrusion, a second protrusion arranged on the upper left block and a second groove arranged on the lower left block to cooperate with the second protrusion, and a third protrusion arranged on the lower left block and a third groove arranged on the lower right block to cooperate with the third protrusion.

[0009] Furthermore, the locking structure also includes a locking hole arranged on the lower right block, a locking block arranged at the tail of the locking pin and fixedly engaged with the locking hole, and a locking pin through hole arranged on the lower right block.

[0010] Furthermore, the locking hole includes a bottom rotating section and a top locking section, the bottom rotating section is a circular hole, the top locking section is a square hole, and the long side of the square hole has the same diameter as the circular hole.

[0011] Furthermore, the blocks and locking pins are both made by 3D printing.

[0012] Furthermore, the locking pin is provided with an operating handle.

[0013] Furthermore, the lower left block, the upper left block and the lower right block are all provided with locking holes.

[0014] The beneficial effects of the present invention are:

[0015] The present invention makes the pad detachable through a combination structure of multiple blocks, which is convenient for easy removal after the operation is completed and does not require destruction to remove, thereby avoiding the risk of contamination from internal unsterilized fragments. The pad is combined through a locking structure and locked by a locking pin to form an overall wedge-shaped pad, thereby ensuring accurate correction of the lower limb force line.

[0016] In short, the present invention can disassemble and remove the cushion block without destroying it, which is safer and more convenient, and the locking pin can realize the one-button unlocking and single-block locking and removal functions. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A three-dimensional diagram of the present invention;

[0018] Figure 2 It is the front view of the present invention;

[0019] Figure 3 is a side view of the present invention;

[0020] Figure 4 It is a cross-sectional view along the AA direction;

[0021] Figure 5 is a three-dimensional diagram of the locking pin;

[0022] Figure 6 is the three-dimensional image of the upper right block;

[0023] Figure 7 is the three-dimensional image of the upper left block;

[0024] Figure 8 is the three-dimensional image of the lower right block;

[0025] Figure 9 It is the main view of the upper right block;

[0026] Figure 10 is a side view of the upper right block;

[0027] Figure 11 for Figure 10 Cross-sectional view along BB direction;

[0028] Figure 12 is the three-dimensional image of the lower left block;

[0029] Figure 13 This is a three-dimensional image of the lower left block from another viewing angle.

[0030] Description of reference numerals:

[0031] 1-block; 2-locking pin; 3-lower left block; 4-upper left block; 5-upper right block; 6-lower right block; 7-first protrusion; 8-first groove; 9-second protrusion; 10-second groove; 11-third protrusion; 12-third groove; 13-locking hole; 14-locking block; 15-locking pin through hole; 16-bottom rotating section; 17-top locking section; 18-operating handle. DETAILED DESCRIPTION

[0032] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0033] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort shall fall within the scope of protection of the present invention.

[0034] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0035] In the above description of the present invention, it should be noted that the terms "one side," "the other side," and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or the orientations or positional relationships in which the inventive product is typically placed when in use. These terms are intended solely to facilitate the description of the present invention and simplify the description, and are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and the like are used solely for distinction and should not be construed as indicating or implying relative importance.

[0036] Furthermore, the term "identical" and similar terms do not necessarily require that the components be absolutely identical; slight variations are permitted. The term "perpendicular" simply refers to the positional relationship between components being more perpendicular than "parallel," not that the structure must be perfectly vertical; rather, it can be slightly tilted.

[0037] like Figure 1-13 As shown, an embodiment of the present invention provides: a 3D printed personalized HTO intraoperative quick-release spreader, including multiple blocks 1 and a locking pin 2. The multiple blocks are combined with a locking structure to form a wedge-shaped pad, which is used to spread the severed tibia to a certain angle during HTO osteotomy to achieve correction of the force line of the lower limb, and the locking pin is used to lock the multiple blocks into a whole to facilitate the insertion of the whole.

[0038] The number of blocks in this embodiment is not limited and can be arbitrarily selected within the range of 3-8 blocks. However, too many blocks will increase the difficulty and time of assembly and also affect the overall structural strength. Therefore, the inventors have proposed a preferred solution through multiple experiments and theoretical analysis: four blocks are provided, namely, the lower left block 3, the upper left block 4, the upper right block 5 and the lower right block 6. The combination of the four blocks is:

[0039] The locking mechanism includes a first protrusion 7 on the upper right block, a first groove 8 on the upper left block that matches the first protrusion, a second protrusion 9 on the upper left block, a second groove 10 on the lower left block that matches the second protrusion, and a third protrusion 11 on the lower left block, and a third groove 12 on the lower right block that matches the third protrusion. The first protrusion snaps into the first groove to form the upper right and upper left blocks, the second protrusion snaps into the second groove to form the upper left and lower left blocks, and the third protrusion snaps into the third groove to form the lower left and lower right blocks.

[0040] At the same time, the locking structure also includes a locking hole 13 arranged on the lower right block, a locking block 14 arranged at the tail of the locking pin and fixed with the locking hole, and a locking pin through hole 15 arranged on the lower right block. The locking pin is inserted through the locking pin through hole and then locked in the locking hole, thereby locking the upper right and lower right blocks. Due to the mutual engagement between the upper right and upper left, the upper left and lower left, and the lower left and lower right, an overall four-block combination structure is formed, namely a wedge-shaped pad.

[0041] In this embodiment, to ensure that the whole is a wedge-shaped body, the upper left block and the upper right block of this embodiment are the same wedge-shaped body, the lower left block and the lower right block are the same wedge-shaped body, and the tapers of the lower left block and the upper left block are connected, and the tapers of the lower right block and the upper right block are connected, thereby forming a smooth wedge-shaped body.

[0042] In this embodiment, the locking hole includes a bottom rotating section 16 and a top locking section 17. The bottom rotating section is a circular hole, and the top locking section is a square hole. The long side of the square hole has the same diameter as the circular hole. The locking block enters through the square hole and rotates in the circular hole, and is blocked by the square hole, thereby forming a lock.

[0043] In this embodiment, the blocks and locking pins are designed and planned before surgery, have good compatibility, and are manufactured by 3D printing, which has extremely high production efficiency.

[0044] In this embodiment, the lower left block, the upper left block and the lower right block are all provided with locking holes, through which the locking pins can be fixed in the locking holes, thereby being easily removed from the osteotomy space.

[0045] In this embodiment, the locking pin is provided with an operating handle 18, which saves effort and is more convenient to operate during operations such as insertion, rotation and removal.

[0046] In this embodiment, the first protrusion is snapped into the first groove, the second protrusion is snapped into the second groove, and the third protrusion is snapped into the third groove, so that the upper right block and the upper left block, the upper left block and the lower left block, and the lower left block and the lower right block form a basic combination, and then the locking pin is inserted into the locking hole of the upper right block through the locking pin through hole of the lower right block and rotated a certain angle to confine the locking block in the locking hole to form an integral lock. When it needs to be opened, it is only necessary to rotate the locking pin first and withdraw it from the locking hole, and the four blocks will be disassembled. Then, they can be inserted into the locking holes of the lower right block, the lower left block, the upper left block and the upper right block respectively, and then taken out respectively.

[0047] This embodiment allows the pad to be disassembled and removed without destroying it, which is safer and more convenient. The locking pin can realize one-button unlocking and single-block locking and removal functions. It is both a component of the assembly and a removal tool, reducing the trouble of using external tools.

[0048] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not limiting. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the purpose and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A 3D printed individualized HTO intraoperative quick-release distractor, characterized by: The invention comprises a plurality of blocks which are combined into a wedge-shaped pad by adopting a locking structure and a locking pin for locking the plurality of blocks, wherein the blocks comprise a lower left block, an upper left block, an upper right block and a lower right block, and the locking structure comprises a first protrusion arranged on the upper right block and a first groove arranged on the upper left block and cooperating with the first protrusion, a second protrusion arranged on the upper left block and a second groove arranged on the lower left block and cooperating with the second protrusion, and a third protrusion arranged on the lower left block and a third groove arranged on the lower right block and cooperating with the third protrusion, and the locking structure further comprises a locking hole arranged on the lower right block, a locking block arranged at the tail of the locking pin and engaged with the locking hole, and a locking pin through hole arranged on the lower right block.

2. A 3D printed individualized HTO intraoperative quick-release spacer according to claim 1, characterized in that :The locking hole includes a bottom rotating section and a top locking section, the bottom rotating section is a circular hole, the top locking section is a square hole, and the long side of the square hole has the same diameter as the circular hole.

3. A 3D printed individualized HTO intraoperative quick-release spacer according to any one of claims 1-2, characterized in that :The blocks and locking pins are both made by 3D printing.

4. A 3D printed individualized HTO intraoperative quick-release spacer according to any one of claims 1-2, characterized in that : The locking pin is provided with an operating handle.

5. A 3D printed individualized HTO intraoperative quick-release spacer according to any one of claims 1-2, characterized in that : The lower left block, upper left block and lower right block are all provided with locking holes.

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