A femoral nail placement module and a manufacturing method thereof

Abstract

The present invention discloses a femoral nailing module and a manufacturing method thereof, comprising: a plate-like main body, the plate-like main body is arranged close to the outer surface of the patient's femur; a first column, the first column is a cylindrical structure, and one end of the first column is connected to the side of the plate-like main body away from the femur; a second column, the second column is a cylindrical structure, and one end of the second column is connected to the side of the plate-like main body away from the femur; a third column, the third column is a cylindrical structure, and one end of the third column is connected to the side of the plate-like main body away from the femur; wherein the plate-like main body, the first column, the second column and the third column are an integrated structure. Through the application of the present invention, the fixation treatment of the patient's femoral fracture can be completed quickly and accurately, and after the corresponding bolts are installed in the corresponding mounting holes, a stable connection can be formed between the patient's femoral head, the greater trochanter and the femoral neck; and the present invention has a simple structure, is easy to use, and is easy to produce by 3D printing.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a femoral nail placement module and a manufacturing method thereof. Background Art

[0002] The most common fracture in clinical practice is femoral neck fracture, which usually occurs in elderly people over 50 years old. In addition, the incidence of femoral neck fracture in young patients is also on the rise due to accidents such as falling from height, severe pressure injury, and car accidents. However, due to the local shear force of the femoral neck, fractures are not easy to fix.

[0003] The femur mainly includes the femoral head with the upper end facing inward and upward and the end bulging into a spherical shape, the femoral neck which is the thinner part at the outer and lower part of the femoral head, and the upward protruding greater trochanter at the junction of the neck and body. The treatment methods usually adopted for femoral neck fractures are mostly to first fix the femoral neck and greater trochanter with steel plates, and then fix the greater trochanter, femoral neck and femoral head with medical fixing bolts. However, the existing femoral nail placement tools are often difficult to produce and have many inconveniences in use, which greatly reduces the work efficiency of medical staff and also brings a bad treatment experience to patients; and the production process of femoral nail placement guide tools is often inconvenient, and it is difficult to reasonably adapt them to different patients. Summary of the invention

[0004] In view of this, in order to solve the above problems, the object of the present invention is to provide a femoral nail placement module, comprising:

[0005] A plate-shaped body, the plate-shaped body being arranged closely against the outer surface of the femur of the patient;

[0006] A first column, wherein the first column is in a cylindrical structure, and one end of the first column is connected to a side of the plate-like body away from the femur;

[0007] A second column, wherein the second column is in a cylindrical structure, and one end of the second column is connected to a side of the plate-like body away from the femur;

[0008] A third column, wherein the third column is in a cylindrical structure, and one end of the third column is connected to a side of the plate-like body away from the femur;

[0009] Wherein, the plate-shaped body, the first column, the second column and the third column are an integrated structure;

[0010] The first column is provided with a first mounting hole along the axial direction, and the first mounting hole passes through the first column and the plate-shaped body;

[0011] The second column is provided with a second mounting hole along the axial direction, and the second mounting hole passes through the second column and the plate-shaped body;

[0012] The third column is provided with a third mounting hole along the axial direction, and the third mounting hole penetrates the third column and the plate-shaped body.

[0013] In another preferred embodiment, a threaded structure is provided on the inner side of the first mounting hole away from one end of the plate-like body; a threaded structure is provided on the inner side of the second mounting hole away from one end of the plate-like body; and a threaded structure is provided on the inner side of the third mounting hole away from one end of the plate-like body.

[0014] In another preferred embodiment, it also includes: a first guide cylinder, a second guide cylinder and a third guide cylinder, the first guide cylinder, the second guide cylinder and the third guide cylinder are all hollow cylindrical structures with openings at both ends, one end of the first guide cylinder is threadedly connected to the first mounting hole, one end of the second guide cylinder is threadedly connected to the second mounting hole, and the third guide cylinder is threadedly connected to the third mounting hole.

[0015] In another preferred embodiment, the inner diameter of one end of the first mounting hole close to the plate-like body is larger than the inner diameter of one end of the first mounting hole close to the first column, the inner diameter of one end of the second mounting hole close to the plate-like body is larger than the inner diameter of one end of the second mounting hole close to the second column, and the inner diameter of one end of the third mounting hole close to the plate-like body is larger than the inner diameter of one end of the third mounting hole close to the third column.

[0016] In another preferred embodiment, the axis of the first cylinder, the axis of the second cylinder, the axis of the third cylinder, the axis of the first guide cylinder, the axis of the second guide cylinder and the axis of the third guide cylinder are all arranged in parallel.

[0017] In another preferred embodiment, the plate-like body is tightly attached to the outer side of the femur along the vertical direction, and both sides of the lower part of the plate-like body are bent toward the femur so that a concave surface is formed on the side of the lower part of the plate-like body close to the femur, and the concave surface semi-surrounds the outer side of the femur.

[0018] In another preferred embodiment, the plate-shaped body, the first column, the second column and the third column are all made of 3D printing materials.

[0019] In another preferred embodiment, the first guide cylinder, the second guide cylinder and the third guide cylinder are all made of metal material.

[0020] A method for manufacturing a femoral nail placement module, comprising any one of the femoral nail placement modules described above, specifically comprising the following steps:

[0021] Step S01, scanning the patient's femur and acquiring scanning data of the femur;

[0022] Step S02, establishing a 3D model of the femur according to the scan data;

[0023] Step S03, performing several cuts along the radial direction of the femoral neck of the 3D model, and obtaining several corresponding cut surfaces;

[0024] Step S04, calculating the area of ​​each cutting surface, and calculating the coordinates of the centroid of each cutting surface;

[0025] Step S05, drawing a central axis passing through the femoral neck using the coordinates of the centroids;

[0026] Step S06, cutting the femoral neck several times along the central axis to obtain several radial surfaces, and selecting the radial surface with the smallest area as the narrowest surface of the femoral neck;

[0027] Step S07, movably setting a guide needle model on the 3D model, the guide needle model comprising: a needle-shaped model part and a nut model part connected to one end of the needle-shaped model part, the needle-shaped model part being arranged parallel to the central axis;

[0028] Step S08, projecting the nut model portion onto the narrowest surface of the femoral neck along the axial direction of the needle-shaped model portion to form a nut projection circular surface;

[0029] Step S09, moving the nut projection circular surface radially along the central axis so that the nut projection circular surface contacts the edge of the narrowest surface of the femoral neck, and when in contact, recording the center point of the nut projection circular surface as a reference point;

[0030] Step S10, by continuing to move the nut projection circular surface, three reference points are formed at the edge of the narrowest surface of the femoral neck, the three reference points are respectively connected to the centroid of the narrowest surface of the femoral neck to form three reference lines, and the angle between each two adjacent reference lines is 120 degrees;

[0031] Step S11, acquiring data of the outer surface contour of the greater trochanter of the 3D model and designing the model of the plate-like body so that one side of the model of the plate-like body is in close contact with the outer side of the greater trochanter of the 3D model;

[0032] Step S12, drawing three reference axes, each of which passes through one of the reference points, and each of which is parallel to the central axis;

[0033] Step S13, extending the three reference axes to the plate-like main body model, and designing the model of the first column, the model of the second column, and the model of the third column according to the positions where the three reference axes pass through the model of the plate-like main body;

[0034] Step S14: Arrange the model data of the plate-like body, the model data of the first column, the model data of the second column, and the model data of the third column, and input them into a 3D printer for integrated production.

[0035] Due to the adoption of the above technical solution, the present invention has the following positive effects compared with the prior art: through the application of the present invention, the fixation treatment of the patient's femoral fracture can be completed quickly and accurately, and after the corresponding bolts are installed in the corresponding mounting holes, a stable connection can be formed between the patient's femoral head, greater trochanter and femoral neck; and the present invention has a simple structure, convenient design, and is easy to produce by 3D printing. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a schematic diagram of the installation of a femoral nail placement module of the present invention;

[0037] Figure 2 A schematic diagram of guide pin coordination of a femoral nail placement module of the present invention;

[0038] Figure 3 It is a schematic diagram of the outer side of a femoral nail placement module of the present invention;

[0039] Figure 4 It is a schematic diagram of the positioning point cutting of a femoral nail placement module of the present invention;

[0040] Figure 5 It is a schematic diagram of the narrowest surface of the femoral neck of a femoral nail placement module of the present invention;

[0041] Figure 6 A schematic diagram of the use of a guide pin model of a femoral nail placement module of the present invention;

[0042] Figure 7 A schematic diagram of determining a reference point of a femoral nail placement module of the present invention.

[0043] In the attached figure:

[0044] 1. Plate-like body; 2. Femur; 11. First column; 12. Second column; 13. Third column; 111. First mounting hole; 121. Second mounting hole; 131. Third mounting hole; 3. First guide cylinder; 4. Second guide cylinder; 5. Third guide cylinder; 6. First guide pin; 7. Second guide pin; 8. Third guide pin; 21. Femoral neck; 22. Femoral head; 23. Greater trochanter; 24. Femoral base; 211. Cutting surface; 212. Narrowest surface of femoral neck; 9. Guide pin model; 91. Needle-shaped model part; 92. Nut model part; 921. Nut projection circular surface; 922. Reference point; 923. Centroid; 924. Positioning point. DETAILED DESCRIPTION

[0045] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but they are not intended to limit the present invention.

[0046] like Figures 1 to 7 As shown, a femoral nail placement module of a preferred embodiment is shown, comprising: a plate-like main body 1, which is arranged close to the outer surface of the patient's femur 2; a first column 11, which has a cylindrical structure, and one end of the first column 11 is connected to the side of the plate-like main body 1 away from the femur 2; a second column 12, which has a cylindrical structure, and one end of the second column 12 is connected to the side of the plate-like main body 1 away from the femur 2; a third column 13, which has a cylindrical structure, and one end of the third column 13 is connected to the side of the plate-like main body 1 away from the femur 2. Furthermore, the plate-like body 1 is tightly fitted with the outer side of the greater trochanter of the patient's femur 2, and the first column 11, the second column 12 and the third column 13 form a guide for the subsequent installation of the bolt nail. The first column 11, the second column 12 and the third column 13 can all be operably inserted with a bolt nail, and the bolt nail passes through the greater trochanter and the back of the femur 2 and is fixed in the head of the femur 2, thereby providing a stable fixation of the femur 2 for the patient.

[0047] Further, as a preferred embodiment, the plate-shaped body 1, the first column 11, the second column 12 and the third column 13 are an integrated structure. Further, in the actual production process, the plate-shaped body 1, the first column 11, the second column 12 and the third column 13 are designed with the help of computer software and then manufactured in an integrated manner through a 3D printer.

[0048] Further, as a preferred embodiment, the first column 11 is provided with a first mounting hole 111 along the axial direction, and the first mounting hole 111 is arranged through the first column 11 and the plate-like body 1. Further, the first mounting hole 111 is used to guide the subsequent first guide cylinder 3 or bolt and to define the installation position.

[0049] Further, as a preferred embodiment, the second column 12 is provided with a second mounting hole 121 along the axial direction, and the second mounting hole 121 passes through the second column 12 and the plate-like body 1; further, the second mounting hole 121 is used to guide the subsequent second guide cylinder 4 or bolt nail and limit the installation position.

[0050] Further, as a preferred embodiment, the third column 13 is provided with a third mounting hole 131 along the axial direction, and the third mounting hole 131 is arranged through the third column 13 and the plate-like body 1. Further, the second mounting hole 121 is used to guide the subsequent second guide cylinder 4 or bolt and to define the installation position.

[0051] Further, as a preferred embodiment, a threaded structure is provided on the inner side of the end of the first mounting hole 111 away from the plate-like body 1; a threaded structure is provided on the inner side of the end of the second mounting hole 121 away from the plate-like body 1; and a threaded structure is provided on the inner side of the end of the third mounting hole 131 away from the plate-like body 1. Further, the threaded structure is generated at the same time as the first mounting hole 111, the second mounting hole 121, and the third mounting hole 131 are formed, that is, the threads are actually formed on the inner side of the first mounting hole 111, the inner side of the second mounting hole 121, and the inner side of the third mounting hole 131, so as to facilitate the subsequent installation of the first guide cylinder 3, the second guide cylinder 4, and the third guide cylinder 5.

[0052] Furthermore, as a preferred embodiment, it also includes: a first guide cylinder 3, a second guide cylinder 4 and a third guide cylinder 5. The first guide cylinder 3, the second guide cylinder 4 and the third guide cylinder 5 are all hollow cylindrical structures with openings at both ends. One end of the first guide cylinder 3 is threadedly connected to the first mounting hole 111, one end of the second guide cylinder 4 is threadedly connected to the second mounting hole 121, and the third guide cylinder 5 is threadedly connected to the third mounting hole 131. Furthermore, the outer edge of one end of the first guide cylinder 3 is provided with a thread matching the above-mentioned threaded structure, the outer edge of one end of the second guide cylinder 4 is provided with a thread matching the above-mentioned threaded structure, and the outer edge of one end of the third guide cylinder 5 is provided with a thread matching the above-mentioned threaded structure, so that medical staff can respectively install the first guide cylinder 3, the second guide cylinder 4 and the third guide cylinder 5 in the first column 11, the second column 12 and the third column 13 by a twisting operation; and the first guide cylinder 3, the second guide cylinder 4 and the third guide cylinder 5 are preferably made of metal material, so that the corresponding guide cylinders have higher bending resistance and wear resistance; when the corresponding guide needle is drilled at high speed, the first guide cylinder 3, the second guide cylinder 4 and the third guide cylinder 5 are not easily broken or worn by external force.

[0053] In another preferred embodiment, the inner diameter of the end of the first mounting hole 111 close to the plate-like body 1 is larger than the inner diameter of the end of the first mounting hole 111 close to the first column 11, the inner diameter of the end of the second mounting hole 121 close to the plate-like body 1 is larger than the inner diameter of the end of the second mounting hole 121 close to the second column 12, and the inner diameter of the end of the third mounting hole 131 close to the plate-like body 1 is larger than the inner diameter of the end of the third mounting hole 131 close to the third column 13. Further, specifically, the first column 11, the second column 12 and the third column 13 and the plate-like body 1 are an integral structure, the first mounting hole 111, the second mounting hole 121, and the third mounting hole 131 are respectively formed at corresponding positions of corresponding columns and the plate-like body 1, and the hole sections of the first mounting hole 111, the second mounting hole 121, and the third mounting hole 131 at the plate-like body 1 are proximal, and the first mounting hole 111, the second mounting hole 121, and the third mounting hole 131 are respectively proximal. 31, the hole sections at the corresponding columns are distal ends. In other words, the proximal end is located at the side of the plate-like body 1 close to the femur, and the distal end is located in the first column 11 or the second column 12 or the third column 13; the diameter of the proximal end is greater than the diameter of the distal end; preferably, the hole section is a channel with a circular cross-section, thereby ensuring that when the guide pin or other structure enters the side of the plate-like body 1 close to the femur, there will be no excessive friction with the plate-like body due to slight deflection, resulting in deformation and wear.

[0054] Furthermore, as a preferred embodiment, when the above-mentioned femoral nail placement module is used, it should also include a first guide needle 6, a second guide needle 7 and a third guide needle 8 used in conjunction with the above-mentioned guide cylinder. The first guide needle 6 can be insertedly installed in the first guide cylinder 3, the second guide needle 7 can be insertedly installed in the second guide cylinder 4, and the third guide needle 8 can be insertedly installed in the third guide cylinder 5. Furthermore, in actual use, medical staff should first pre-set the plate-like body 1, the first column 11, the second column 12, and the third column 13 according to the condition of the patient's femur 2, and then fit the plate-like body 1 to the surface of the patient's femur 2, and then match and install the first guide cylinder 3, the second guide cylinder 4, and the third guide cylinder 5 made of metal material with the plate-like body 1, and then nail the first guide needle 6, the second guide needle 7, and the third guide needle 8 along the first guide cylinder 3, the second guide cylinder 4, and the third guide cylinder 5 respectively to complete the preliminary positioning. During the insertion of the first guide needle 6, the second guide needle 7, and the third guide needle 8 into the femur, the guide needle itself does not contact the plate-like body 1 and the first column 11, the second column 12, and the third column 13. During the positioning process, the CT imaging device can be used to judge whether the positions of the first guide pin 6, the second guide pin 7 and the third guide pin 8 in the femur 2 are correct; after confirming that the positioning is accurate, the first guide cylinder 3, the second guide cylinder 4 and the third guide cylinder 5 are first unscrewed, and then the plate-like main body 1 is removed. At this time, only the first guide pin 6, the second guide pin 7 and the third guide pin 8 used for positioning are retained to be connected to the femur, and then the hollow nail is screwed in along the first guide pin 6, the second guide pin 7 and the third guide pin 8. Specifically, the outer diameter of the guide pin should match the inner diameter of the hollow nail. The hollow nail is sleeved on the outside of the first guide pin 6, the second guide pin 7 and the third guide pin 8 and driven into the femur. Finally, the first guide pin 6, the second guide pin 7 and the third guide pin 8 are withdrawn, and only the hollow nail screwed into the femur for fixation is retained to complete the fixation of the entire femur.

[0055] Furthermore, as a preferred embodiment, the first guide needle 6, the second guide needle 7 and the third guide needle 8 can be made of a developing material, or a shell made of a developing material can be formed on the surface of the first guide needle 6, the second guide needle 7 and the third guide needle 8 to facilitate the medical imaging device to observe the position of the first guide needle 6, the second guide needle 7 and the third guide needle 8.

[0056] Further, as a preferred embodiment, the axis of the first cylinder 11, the axis of the second cylinder 12, the axis of the third cylinder 13, the axis of the first guide cylinder 3, the axis of the second guide cylinder 4, the axis of the third guide cylinder 5, the axis of the first guide needle 6, the axis of the second guide needle 7 and the axis of the third guide needle 8 are all arranged in parallel.

[0057] The above description is only a preferred embodiment of the present invention, and does not limit the implementation mode and protection scope of the present invention.

[0058] The present invention also has the following implementation modes based on the above:

[0059] In a further embodiment of the present invention, the plate-like body 1 is closely attached to the outer side of the femur 2 in the vertical direction, and the two sides of the lower part of the plate-like body 1 are respectively bent toward the direction close to the femur 2 so that a concave surface is formed on the side of the lower part of the plate-like body 1 close to the femur 2, and the concave surface half surrounds the outer side of the femur 2. Furthermore, the plate-like body 1 is made to fit the outer surface of the greater trochanter of the femur 2 as much as possible, so as to prevent the plate-like body 1 from accidentally slipping during operation by medical staff.

[0060] In a further embodiment of the present invention, the plate-like body 1, the first column 11, the second column 12 and the third column 13 are all made of 3D printing materials. Further, the selected 3D printing material should have a certain hardness after the above-mentioned femoral 2 nail placement module is manufactured. Preferably, PLA plastic printing material can be used.

[0061] In a further embodiment of the present invention, the first guide cylinder 3, the second guide cylinder 4 and the third guide cylinder 5 are all made of metal material.

[0062] In a further embodiment of the present invention, the upper edge of the plate-like body 1 is arranged in an arc shape with a protruding middle portion, thereby improving the patient's treatment experience and avoiding sharp protrusions on the outer edge of the plate-like body 1, thereby preventing the patient's tissue nerves from feeling pain.

[0063] A method for manufacturing a femoral nail placement module, comprising any one of the above-mentioned femoral nail placement modules, specifically comprising the following steps:

[0064] Step S01, scanning the patient's femur 2 and obtaining scanning data of the femur 2; further, scanning the patient's femur 2 by X-ray and CT film technology to accurately obtain 3D information of the patient's femur 2.

[0065] Step S02, establishing a 3D model of the femur 2 according to the scanning data; further, with the help of computer software, the scanning device transmits the acquired 3D information to the computer of the medical staff, and the computer software automatically generates a corresponding 3D model.

[0066] Step S03, make several cuts along the radial direction of the femoral neck 21 of the 3D model, and obtain several corresponding cutting surfaces 211; further, the medical staff roughly estimates the radial position of the femoral neck 21 of the femur 2 of the generated 3D model by operating the computer software, and cuts and generates several corresponding cutting surfaces 211.

[0067] In another preferred embodiment of step S03, the following operation method can be performed to achieve the same purpose as the above-mentioned S03; the medical staff roughly estimates the radial position of the femoral neck 21 of the femur 2 of the generated 3D model by operating the computer software, cuts it and generates at least two initial cutting surfaces 211 accordingly. In the actual operation process, first, point positioning can be performed on the lower edge of the femoral head 22 (the end of the femoral neck 21 close to the femoral head 22) and the femoral base 24 (the end of the femoral neck 21 close to the greater trochanter 23). Specifically, the entire 3D model is placed in the vertical direction, and the 3D model is dragged and moved so that the medical staff can observe the perspective of one side of the entire femur 2, such as Figure 3 From a viewing angle, three positioning points 924 that are not in a straight line are taken on the lower edge of the femoral head 22 and the femoral base 24 respectively through auxiliary tools such as computer software. In other words, three positioning points 924 are taken at both ends of the femoral neck 21 respectively, and because the outer edge of the femoral neck 21 is arc-shaped, it can be located along the adjacent Figure 3 The three positioning points 924 are taken at the upper, middle and lower positions, and the three positioning points 924 form a plane passing through the femoral neck 21, which is triangular. The plane extends to cover the entire femoral neck 21 to form the above-mentioned initial cutting surface; by cutting two groups of three positioning points 924 twice respectively, the two above-mentioned initial cutting surfaces 211 are obtained, and then the centroids of the above-mentioned two initial cutting surfaces 211 are calculated to confirm the positions, and the centroids of the above-mentioned two initial cutting surfaces are connected to form an initial connecting line, and several equidistant cuttings are performed along the initial connecting line to form the required several cutting surfaces 211.

[0068] Step S04, the area of ​​each cutting surface 211 is calculated, and the coordinates of the centroid 923 of each cutting surface 211 are calculated; further, the area of ​​each cutting surface 211 is calculated and obtained by computer software, and the centroid 923 of each cutting surface 211 is calculated. In the process of calculating the centroid 923, the entire cutting surface 211 can be regarded as a closed non-self-intersecting polygon. For the above-mentioned closed non-self-intersecting polygon, the following centroid calculation formula is used:

[0069]

[0070]

[0071]

[0072] Step S05, a central axis passing through the femoral neck is drawn through the coordinates of the several centroids. Further, the centroid 923 of each obtained cutting surface 211 is recorded, and the above-mentioned central axis is formed by fitting through the least square method; in other words, an axis closest to the several centroids 923 is obtained through mathematical calculation; in addition, the centroid and area of ​​each cutting surface 211 can be calculated synchronously when the cutting surface 211 is generated, and the coordinates of the several centroids 923 are recorded in sequence, and a straight line closest to the above-mentioned several centroids 923 is drawn through computer software, and the straight line is the above-mentioned central axis.

[0073] Step S06, cutting the femoral neck several times along the central axis to obtain several radial surfaces, and selecting the radial surface with the smallest area as the narrowest surface of the femoral neck. Further, each of the above radial surfaces is arranged perpendicular to the above central axis, and the design of subsequent manufacturing dimensions is limited by the radial surface with the smallest area.

[0074] Step S07, a guide needle model 9 is movably set on the 3D model, and the guide needle model 9 includes: a needle-shaped model part 91 and a nut model part 92 connected to one end of the needle-shaped model part 91, and the axis of the needle-shaped model part 92 is set parallel to the central axis; further, the guide needle model 9 is a virtual model preset in the software, and the design data is specifically determined by reasonably moving the guide needle model 9, wherein the diameter of the nut model part 92 is larger than the diameter of the needle-shaped model part 91, and the diameter of the nut model part 92 should also be larger than the diameter of the above-mentioned hollow nail.

[0075] Step S08, project the nut model part 92 onto the narrowest surface 212 of the femoral neck along the axial direction of the needle-shaped model part 91, and form a nut projection circular surface 921; further, the needle-shaped model part 91 is coaxially arranged with the nut model part 92, and the axial direction of the needle-shaped model part 91 is preferably perpendicular to the above-mentioned narrowest surface of the femoral neck.

[0076] Step S09, moving the nut projection circular surface 921 radially along the central axis so that the nut projection circular surface 921 contacts the edge of the narrowest surface 212 of the femoral neck, and when in contact, recording the center point of the nut projection circular surface 921 as a reference point 922;

[0077] Step S10, by continuing to move the nut projection circular surface 921, three reference points 922 are formed at the edge of the narrowest surface 212 of the femoral neck, and the three reference points 922 are respectively connected to the centroid of the narrowest surface of the femoral neck 21 to form three reference lines, and the angle between each two adjacent reference lines is 120 degrees;

[0078] Step S11, obtaining data of the outer surface contour of the greater trochanter 23 of the 3D model and designing the model of the plate-like body 1 so that one side of the model of the plate-like body 1 is in close contact with the outer side of the greater trochanter 23 of the 3D model;

[0079] Step S12, draw three reference axes, each of which passes through a reference point 922, and each of which is parallel to the central axis;

[0080] Step S13, extend the three reference axes to the model of the plate-like body 1, and design the model of the first column 11, the model of the second column 12, and the model of the third column 13 according to the positions where the three reference axes pass through the model of the plate-like body 1; further, the three above-mentioned reference axes are the axis of the first column 11, the axis of the second column 12, and the axis of the third column 13.

[0081] Step S14, sort out the model data of the plate-like body 1, the model data of the first column 11, the model data of the second column 12, and the model data of the third column 13, and input them into the 3D printer for integrated production. Further, the plate-like body 1, the first column 11, the second column 12, and the third column 13 are printed and generated at one time by the 3D printer and with suitable PLC plastic printing materials; at the same time, the corresponding first mounting hole 111, the second mounting hole 121, and the third mounting hole 131 can also be automatically designed and reserved according to the data of the first column 11, the data of the second column 12, and the third column 13.

[0082] In summary, through the application of the present invention, the fixation treatment of the patient's femoral fracture 2 can be completed quickly and accurately. After the corresponding bolts are installed in the corresponding mounting holes, a stable connection can be formed between the patient's femoral head 22, greater trochanter 23 and femoral neck 21; and the present invention has a simple structure, convenient design, and is easy to 3D print and produce.

[0083] The above description is only a preferred embodiment of the present invention, and does not limit the implementation mode and protection scope of the present invention. For those skilled in the art, it should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for manufacturing a femoral nail placement module, characterized in that: The steps include: Step S01, scanning the patient's femur and acquiring scanning data of the femur; Step S02, establishing a 3D model of the femur according to the scan data; Step S03, performing several cuts along the radial direction of the femoral neck of the 3D model, and obtaining several corresponding cut surfaces; Step S04, calculating the area of ​​each cutting surface, and calculating the coordinates of the centroid of each cutting surface; Step S05, drawing a central axis passing through the femoral neck using the coordinates of the centroids; Step S06, cutting the femoral neck several times along the central axis to obtain several radial surfaces, and selecting the radial surface with the smallest area as the narrowest surface of the femoral neck; Step S07, movably setting a guide needle model on the 3D model, the guide needle model comprising: a needle-shaped model part and a nut model part connected to one end of the needle-shaped model part, the needle-shaped model part being arranged parallel to the central axis; Step S08, projecting the nut model portion onto the narrowest surface of the femoral neck along the axial direction of the needle-shaped model portion to form a nut projection circular surface; Step S09, moving the nut projection circular surface radially along the central axis so that the nut projection circular surface contacts the edge of the narrowest surface of the femoral neck, and when in contact, recording the center point of the nut projection circular surface as a reference point; Step S10, by continuing to move the nut projection circular surface, three reference points are formed at the edge of the narrowest surface of the femoral neck, the three reference points are respectively connected to the centroid of the narrowest surface of the femoral neck to form three reference lines, and the angle between each two adjacent reference lines is 120 degrees; Step S11, obtaining data of the outer surface contour of the greater trochanter of the 3D model and designing a model of a plate-like body so that one side of the model of the plate-like body is in close contact with the outer side of the greater trochanter of the 3D model; Step S12, drawing three reference axes, each of which passes through one of the reference points, and each of which is parallel to the central axis; Step S13, extending the three reference axes to the plate-like main body model, and designing the models of the first column, the second column, and the third column according to the positions where the three reference axes pass through the model of the plate-like main body; Step S14: Arrange the model data of the plate-like body, the model data of the first column, the model data of the second column, and the model data of the third column, and input them into a 3D printer for integrated production.

2. A femoral nail placement module manufactured by the manufacturing method according to claim 1, characterized in that: include: A plate-shaped body, the plate-shaped body being arranged closely against the outer surface of the femur of the patient; A first column, wherein the first column is in a cylindrical structure, and one end of the first column is connected to a side of the plate-like body away from the femur; A second column, wherein the second column is in a cylindrical structure, and one end of the second column is connected to a side of the plate-like body away from the femur; A third column, wherein the third column is in a cylindrical structure, and one end of the third column is connected to a side of the plate-like body away from the femur; Wherein, the plate-shaped body, the first column, the second column and the third column are an integrated structure; The first column is provided with a first mounting hole along the axial direction, and the first mounting hole passes through the first column and the plate-shaped body; The second column is provided with a second mounting hole along the axial direction, and the second mounting hole passes through the second column and the plate-shaped body; The third column is provided with a third mounting hole along the axial direction, and the third mounting hole penetrates the third column and the plate-shaped body.

3. The femoral nail placement module according to claim 2, characterized in that: A threaded structure is provided on the inner side of the first mounting hole away from one end of the plate-like body; a threaded structure is provided on the inner side of the second mounting hole away from one end of the plate-like body; and a threaded structure is provided on the inner side of the third mounting hole away from one end of the plate-like body.

4. The femoral nail placement module according to claim 3, characterized in that: Also includes: The first guide cylinder, the second guide cylinder and the third guide cylinder, the first guide cylinder, the second guide cylinder and the third guide cylinder are all hollow cylindrical structures with openings at both ends, one end of the first guide cylinder is threadedly connected to the first mounting hole, one end of the second guide cylinder is threadedly connected to the second mounting hole, and the third guide cylinder is threadedly connected to the third mounting hole.

5. The femoral nail placement module according to claim 4, characterized in that An inner diameter of an end of the first mounting hole close to the plate-like body is larger than an inner diameter of an end of the first mounting hole close to the first column, an inner diameter of an end of the second mounting hole close to the plate-like body is larger than an inner diameter of an end of the second mounting hole close to the second column, and an inner diameter of an end of the third mounting hole close to the plate-like body is larger than an inner diameter of an end of the third mounting hole close to the third column.

6. The femoral nail placement module according to claim 4, characterized in that: The axis of the first cylinder, the axis of the second cylinder, the axis of the third cylinder, the axis of the first guide cylinder, the axis of the second guide cylinder and the axis of the third guide cylinder.

7. The femoral nail placement module according to claim 2, characterized in that: The plate-like body is vertically attached to the outer side of the femur, and the two sides of the lower part of the plate-like body are bent toward the femur to form a concave surface on the side of the lower part of the plate-like body close to the femur, and the concave surface semi-surrounds the outer side of the femur.

8. The femoral nail placement module according to claim 2, characterized in that: The plate-shaped body, the first column, the second column and the third column are all made of 3D printing materials.

9. The femoral nail placement module according to claim 4, characterized in that: The first guide cylinder, the second guide cylinder and the third guide cylinder are all made of metal material.

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