3D printing individualized HTO intraoperative quick-release distraction device

Abstract

The invention relates to a 3D printing individualized HTO intraoperative quick-release dilator, which belongs to the technical field of HTO osteotomy, and comprises a plurality of sub-blocks which are combined by adopting lock catch structures to form a wedge-shaped cushion block, and a lock pin for locking the plurality of sub-blocks. The cushion block is detachable through a combined structure of a plurality of sub-blocks, can be easily taken out after an operation is completed and can be taken out without being damaged, so that the pollution risk of internal undisinfected fragments is avoided, and the integral wedge-shaped cushion block is formed through combination of a lock catch structure and locking of a lock pin, so that accurate correction of a force line of a lower limb is ensured, and the operation is convenient. And the safety and the portability are obviously improved.

Description

Technical Field

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

[0002] HTO osteotomy is used to correct knee valgus and valgus. It corrects the force line of the lower limb by cutting the tibia (not completely cutting it to leave a hinge) and then opening it to a certain angle. The accuracy of the correction angle is the key to this operation. Conventional angle positioning uses metal clamps to open the opening to achieve a preset angle, and then fix the steel plate to stabilize the opening angle.

[0003] However, the precision of opening with metal pliers is limited, and the existing technology has begun to use 3D printed pads. 3D printed pads are precisely designed based on the patient's knee joint model for preoperative planning. They have a very high degree of matching, improve surgical accuracy, and are quickly and efficiently made, with a high degree of acceptance. However, the 3D printed pad adopts an integral structure. When the steel plate is fixed, there is a large area of ​​contact between the pad and the bone, which produces a large bonding force. Therefore, the pad cannot be removed as a whole. The only way is to break the pad into multiple fragments and take them out separately. However, during preoperative disinfection, the pad is only disinfected on the outside, not on the inside. Therefore, after being destroyed, it is very likely to introduce contaminants and bring the risk of contamination to the osteotomy area. Summary of the invention

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

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

[0006] A 3D printed individualized HTO intraoperative quick-release spreader comprises a plurality of blocks which are combined in 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 comprises 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 the 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 easy to remove after the operation is completed and does not require destruction to remove, thereby avoiding the risk of contamination by internal unsterilized fragments. The pad is combined through a locking structure and locked by a locking pin to form an integral wedge-shaped pad, thereby ensuring accurate correction of the force line of the lower limbs.

[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 functions of one-key unlocking and single-block locking and removal. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0018] Figure 2 It is a 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 A three-dimensional diagram of the locking pin;

[0022] Figure 6 It 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] Fig. 9 It is the main view of the upper right block;

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

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

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

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

[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] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are 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 here 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 claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are 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, further definition and explanation thereof is not required in subsequent drawings.

[0035] In the above description of the present invention, it should be noted that the terms "one side", "the other side", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the invention is usually placed when in use, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply 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", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0036] In addition, the term "same" does not mean that the parts must be absolutely the same, but slight differences are allowed. The term "vertical" only means that the positional relationship between the parts is more vertical than "parallel", and does not mean that the structure must be completely vertical, but can be slightly tilted.

[0037] like Figure 1-13 As shown, an embodiment of the present invention provides: a 3D printed individualized HTO intraoperative quick-release spreader, comprising a plurality of blocks 1 and a locking pin 2, wherein the plurality of blocks are combined in 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 plurality of 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 will also affect the overall structural strength. Therefore, the inventors have proposed a preferred solution through multiple experiments and theoretical analysis: four blocks are set, 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 lock structure includes a first protrusion 7 provided on the upper right block, a first groove 8 provided on the upper left block and matched with the first protrusion, a second protrusion 9 provided on the upper left block, a second groove 10 provided on the lower left block and matched with the second protrusion, and a third protrusion 11 provided on the lower left block and a third groove 12 provided on the lower right block and matched with the third protrusion. The first protrusion is inserted into the first groove to form a combination of the upper right block and the upper left block, the second protrusion is inserted into the second groove to form a combination of the upper left block and the lower left block, and the third protrusion is inserted into the third groove to form a combination of the lower left block and the lower right block;

[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 integral four-block combination structure is formed, namely the wedge-shaped pad.

[0041] In this embodiment, in order 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 matching properties, and are manufactured by 3D printing with 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 inserted into the first groove, the second protrusion is inserted into the second groove, and the third protrusion is inserted 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, so that the four blocks are disassembled, and then they are respectively inserted into the locking holes of the lower right block, the lower left block, the upper left block and the upper right block, and taken out respectively.

[0047] This embodiment allows the gasket to be disassembled and removed without destroying it, which is safer and more convenient. The locking pin can realize one-touch 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 solution of the present invention rather than to limit it. 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 solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. A 3D printed individualized HTO intraoperative quick-release distractor, characterized in that: It comprises a plurality of blocks which are combined into a wedge-shaped cushion block by adopting a locking structure and a locking pin for locking the plurality of blocks.

2. A 3D printed individualized HTO intraoperative quick-release distractor according to claim 1, characterized in that: The blocks include a lower left block, an upper left block, an upper right block and a lower right block.

3. A 3D printed individualized HTO intraoperative quick-release distractor according to claim 2, characterized in that The locking structure includes a first protrusion arranged on the upper right block and a first groove arranged on the upper left block to match the first protrusion, a second protrusion arranged on the upper left block and a second groove arranged on the lower left block to match the second protrusion, and a third protrusion arranged on the lower left block and a third groove arranged on the lower right block to match the third protrusion.

4. A 3D printed individualized HTO intraoperative quick-release distractor according to claim 3, characterized in that 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.

5. A 3D printed individualized HTO intraoperative quick-release distractor according to claim 4, 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.

6. A 3D printed individualized HTO intraoperative quick-release distractor according to any one of claims 1-5, characterized in that The blocks and locking pins are both made by 3D printing.

7. A 3D printed individualized HTO intraoperative quick-release distractor according to any one of claims 1-5, characterized in that :The locking pin is provided with an operating handle.

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

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