An individualized femoral neck fracture bone graft guide

Abstract

The utility model provides a kind of personalized femoral neck fracture bone grafting guide ware, belong to medical instrument technical field, bone grafting guide ware is equipped with the fitment, the inner side surface of fitment is set to the fitment with greater trochanter side rear, bone grafting guide ware outer side surface is fixed with kirschner wire sleeve, for accurate guiding kirschner wire positioning, kirschner wire sleeve is equipped with through-hole, and is communicated with inner side.The bone grafting guide ware is also equipped with the fixed hole for being fixed with greater trochanter in fitment, the utility model realizes effective fixed support by fitment, realizes accurate positioning and reaches to bone defect area (i.e. bone grafting target area) by the guidance of kirschner wire sleeve, to realize subsequent accurate bone grafting.

Description

Technical Field

[0001] This utility model belongs to the field of medical device technology, and in particular relates to a personalized femoral neck fracture bone graft guide. Background Technology

[0002] Femoral neck fractures are often accompanied by bone defects at the fracture site. The location and size of the bone defect directly affect the healing of the fracture, nonunion, and the incidence of femoral head necrosis. Furthermore, bone defects in different locations will cause corresponding changes in the surface stress of the implant.

[0003] The most direct way to address bone defects is bone grafting. Currently, commonly used femoral neck bone grafting methods include bone flap transplantation and bone marrow transplantation. The former includes vascularized bone flaps and muscularized bone flaps. Its advantages are that it provides bony support to the defect site and has its own blood supply; its disadvantages include the need for open surgery, damage to the donor site, donor shape mismatch, increased surgical scope, time, and blood loss, and also requires a high level of microsurgical skill from the surgeon. The latter method allows for minimally invasive procedures, but it cannot provide effective bony support and cannot precisely locate the defect site. Utility Model Content

[0004] The purpose of this invention is to provide a personalized femoral neck fracture bone graft guide, including a fitting part for applying to the posterior surface of the greater trochanter of the femur to achieve more precise positioning. The posterior surface of the fitting part is the fitting surface, and this invention achieves fitting with the posterior surface of the greater trochanter of the femur through the fitting surface. The fitting part is provided with fixing holes for fixing the bone graft guide to the femur or tibia. To achieve precise positioning of the Kirschner wire, a Kirschner wire sleeve communicating with the interior is fixed to the outer surface of the bone graft guide. Guided by this sleeve, the Kirschner wire can more accurately position the target area for bone grafting.

[0005] Furthermore, the bone graft guide for the fitting area is integrally molded, with a thickness of 1-2mm.

[0006] Furthermore, the Kirschner wire sleeve has an inner diameter of 2.6 mm, a wall thickness of 1 mm, and a length of 10-15 mm.

[0007] Furthermore, the bone graft guide can be fabricated using 3D printing technology, with photosensitive resin being the preferred printing material.

[0008] Compared with the prior art, the beneficial effects of this utility model are mainly reflected in the following aspects: This utility model achieves effective fixation and support through the fitting part, and achieves precise positioning and arrival at the bone defect area (i.e., the target area for bone grafting) through the guidance of the Kirschner wire sleeve, so as to achieve subsequent precise bone grafting. Attached Figure Description

[0009] Figure 1This is a schematic diagram of the structure of a personalized femoral neck fracture bone grafting guide according to this utility model.

[0010] Figure 2 This is a schematic diagram of the structure of the bone graft guide of this utility model in conjunction with the greater trochanter of the femur.

[0011] Figure 3 This is a schematic diagram of step 1 in the use of the bone graft guide of this utility model.

[0012] Figure 4 This is a schematic diagram of step 2 in the use of the bone graft guide of this utility model.

[0013] Figure 5 This is a schematic diagram of step 4 in the use of the bone graft guide of this utility model.

[0014] Figure 6 This is a schematic diagram of step 5 in the use of the bone graft guide of this utility model. Detailed Implementation

[0015] The following is a more detailed description of a personalized femoral neck fracture bone graft guide according to the present invention, with reference to the schematic diagrams, which illustrate preferred embodiments of the present invention. It should be understood that those skilled in the art can modify the present invention described herein while still achieving the beneficial effects of the present invention. Therefore, the following description should be understood as being of general knowledge to those skilled in the art and is not intended to limit the present invention.

[0016] like Figure 1 and 2 As shown, a personalized femoral neck fracture bone graft guide can be used in closed reduction surgery for femoral neck fractures. The inner surface of the bone graft guide is attached to the posterior surface of the greater trochanter of the patient's femur. During closed reduction surgery for femoral neck fractures, the Kirschner wire 4 can be precisely positioned to reach the bone defect area (also known as the target area for bone grafting) under the guidance of the Kirschner wire sleeve 3 to achieve precise subsequent bone grafting.

[0017] Specifically, the bone graft guide is provided with a fitting part 1, wherein the inner side of the fitting part 1 is a fitting surface. Through the fitting surface, the bone graft guide can be attached to the posterior side of the greater trochanter of the patient's femur to achieve effective fixation and support.

[0018] The outer side of the bone graft guide is provided with a Kirschner wire sleeve 3, and the Kirschner wire sleeve 3 has a through hole for guiding the Kirschner wire 4 to accurately reach the bone defect area (also known as the target area for bone grafting). The bone graft guide is provided with a fixation hole 2, which can be fixed to the femur with screws or other fasteners.

[0019] It is worth mentioning that, taking the greater trochanter of the femur as an example, the bony surface area on the posterior side of the greater trochanter of the femur is referred to as the "bone attachment surface". Using the 3-matic uniform offset tool, the extracted bone attachment surface is uniformly offset outward (i.e., in the opposite direction to the bony surface) by 1-2 mm to form the attachment part.

[0020] Using the bone graft path as the axis, the parameters of the Kirschner wire sleeve 3 are determined. This invention preferably uses a Kirschner wire with a diameter of 2.5 mm to generate a Kirschner wire sleeve 3 with an inner diameter of 2.6 mm, a wall thickness of 1 mm, and a length of 10-15 mm, which is used to guide the insertion of the Kirschner wire 4 during the operation.

[0021] In this invention, the bone graft guide can be integrally formed by 3D printing technology, with photosensitive resin being the preferred printing material and a thickness of 1-2 mm.

[0022] The method of using this bone graft guide is as follows: 1. For example Figure 3 As shown, a guide is inserted, and the inner surface of the guide is attached to the corresponding femoral surface.

[0023] 2. For example Figure 4 As shown, the guide is secured with screws through the fixing holes.

[0024] 3. For example Figure 5 As shown, a Kirschner wire with a diameter of 2.5 mm was selected and punctured to the target bone graft point C through the Kirschner wire sleeve.

[0025] 4. For example Figure 6 As shown, unscrew the fixing screws and remove the bone graft guide to complete the guidance of the target area for bone grafting.

[0026] The above are merely preferred embodiments of this utility model and do not constitute any limitation on this utility model. Any equivalent substitutions or modifications made by those skilled in the art to the technical solutions and contents disclosed in this utility model without departing from the scope of the technical solutions of this utility model shall still fall within the protection scope of this utility model.

Claims

1. A personalized femoral neck fracture bone grafting guide, characterized in that, The bone graft guide body is provided with a fitting part for attaching to the posterior side of the greater trochanter of the femur. The fitting part is provided with a fixing hole for fixing the bone graft guide to the femur or tibia. The bone graft guide is also provided with a Kirschner wire sleeve for positioning the target area of ​​the bone graft with Kirschner wires.

2. The personalized femoral neck fracture bone grafting guide according to claim 1, characterized in that, The Kirschner wire sleeve has an inner diameter of 2.6 mm, a wall thickness of 1 mm, and a length of 10-15 mm.

3. The personalized femoral neck fracture bone grafting guide according to claim 1, characterized in that, The fitting part and the bone graft guide are integrally made, and the thickness of both is 1-2mm.

4. The personalized femoral neck fracture bone grafting guide according to claim 3, characterized in that, The bone graft guide is a bone graft guide made of photosensitive resin by 3D printing.

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