阅读说明：本技术 一种股骨置钉模块及其制作方法 (Femur nail-placing module and manufacturing method thereof ) 是由 占师 胡海 张长青 姜达君 徐健 于 2021-01-20 设计创作，主要内容包括：本发明公开了一种股骨置钉模块及其制作方法,包括：板状主体,板状主体紧贴患者的股骨的外侧表面设置；第一柱体,第一柱体呈圆柱形结构,且第一柱体的一端与板状主体远离股骨的一侧连接；第二柱体,第二柱体呈圆柱形结构,且第二柱体的一端与板状主体远离股骨的一侧连接；第三柱体,第三柱体呈圆柱形结构,且第三柱体的一端与板状主体远离股骨的一侧连接；其中,板状主体、第一柱体、第二柱体和第三柱体为一体式结构。通过对本发明的应用,可快速、精准地完成对患者的股骨骨折的固定处理,在对应的安装孔内装入对应的螺栓后可使患者的股骨头、大转子以及股骨颈之间形成稳定的联系；且本发明结构简单、使用方便、易于3D打印生产。(The invention discloses a femur nail placing module and a manufacturing method thereof, wherein the femur nail placing module comprises the following steps: a plate-like body disposed in close proximity to an outer surface of a femur of a patient; the first cylinder is of a cylindrical structure, and one end of the first cylinder is connected with one side, away from the femur, of the plate-shaped main body; the second column body is of a cylindrical structure, and one end of the second column body is connected with one side, away from the femur, of the plate-shaped main body; the third cylinder is of a cylindrical structure, and one end of the third cylinder is connected with one side, away from the femur, of the plate-shaped main body; wherein, platelike main part, first cylinder, second cylinder and third cylinder formula structure as an organic whole. By applying the invention, the fixation treatment of the femoral fracture of the patient can be rapidly and accurately finished, and the femoral head, the greater trochanter and the femoral neck of the patient can form stable connection after the corresponding bolts are arranged in the corresponding mounting holes; the invention has simple structure, convenient use and easy 3D printing production.)

1. A femoral nail placement module, comprising:

a plate-like body disposed in close proximity to an outer surface of a femur of a patient;

the first cylinder is of a cylindrical structure, and one end of the first cylinder is connected with one side, away from the femur, of the plate-shaped main body;

the second column body is of a cylindrical structure, and one end of the second column body is connected with one side, away from the femur, of the plate-shaped main body;

the third cylinder is of a cylindrical structure, and one end of the third cylinder is connected with one side, away from the femur, of the plate-shaped main body;

wherein the plate-shaped main body, the first cylinder, the second cylinder and the third cylinder are of an integrated structure;

the first column body is provided with a first mounting hole along the axial direction, and the first mounting hole penetrates through the first column body and the plate-shaped main body;

the second column body is provided with a second mounting hole along the axial direction, and the second mounting hole penetrates through the second column body and the plate-shaped main body;

and a third mounting hole is formed in the third column body along the axial direction, and the third mounting hole penetrates through the third column body and the plate-shaped main body.

2. The femoral nail placement module according to claim 1, wherein the inner side of the end of the first mounting hole away from the plate-shaped body is provided with a thread structure; a threaded structure is arranged on the inner side of one end, away from the plate-shaped main body, of the second mounting hole; and a thread structure is arranged on the inner side of one end, far away from the plate-shaped main body, of the third mounting hole.

3. The femoral nail placement module of claim 2, further comprising: the first guide cylinder, the second guide cylinder and the third guide cylinder are hollow cylindrical structures with two open ends, one end of the first guide cylinder is in threaded connection with the inside of the first mounting hole, one end of the second guide cylinder is in threaded connection with the inside of the second mounting hole, and the third guide cylinder is in threaded connection with the inside of the third mounting hole.

4. The femoral nail placement module of claim 3, wherein the first mounting hole has an inner diameter proximate to an end of the plate-like body that is greater than an inner diameter of the first mounting hole proximate to an end of the first post, the second mounting hole has an inner diameter proximate to an end of the plate-like body that is greater than an inner diameter of the second mounting hole proximate to an end of the second post, and the third mounting hole has an inner diameter proximate to an end of the plate-like body that is greater than an inner diameter of the third mounting hole proximate to an end of the third post.

5. The femoral nail placement module of claim 3, wherein 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.

6. The femoral nail placement module according to claim 1, wherein the plate-shaped body is closely attached to the outer side of the femur in a vertical direction, and both sides of the lower portion of the plate-shaped body are respectively bent toward the direction close to the femur so that the side of the lower portion of the plate-shaped body close to the femur forms a concave surface, and the concave surface is semi-enclosed on the outer side of the femur.

7. The femoral nail placement module of claim 1, wherein the plate-like body, the first cylinder, the second cylinder, and the third cylinder are all made of 3D printed material.

8. The femoral nail placement module of claim 3, wherein the first guide cylinder, the second guide cylinder and the third guide cylinder are all made of a metal material.

9. A method for manufacturing a femoral nail placing module comprises any one of the femoral nail placing modules, and is characterized by comprising the following steps:

step S01, scanning the thighbone of a patient and acquiring the scanning data of the thighbone;

step S02, establishing a 3D model of the femur according to the scanning data;

step S03, cutting for a plurality of times along the radial direction of the femoral neck of the 3D model, and obtaining a plurality of corresponding cutting 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 through the coordinates of a plurality of centroids;

step S06, cutting the femoral neck for a plurality of times along the central axis to obtain a plurality of radial surfaces, and selecting one radial surface with the smallest area as the narrowest surface of the femoral neck;

step S07, movably setting a guide pin model on the 3D model, where the guide pin model includes: the needle-shaped model part is arranged in parallel to the central axis;

step S08, projecting the nut model part onto the narrowest surface of the femoral neck along the axial direction of the needle model part, and forming a nut projection round surface;

step S09, moving the nut projection circular surface along the radial direction of the central axis to enable the nut projection circular surface to be in contact with the edge of the narrowest surface of the femoral neck, and recording the central point of the nut projection circular surface as a datum point at the moment when the nut projection circular surface is in contact with the edge of the narrowest surface of the femoral neck;

step S10, forming three reference points at the edge of the narrowest surface of the femoral neck by continuously moving the nut projection circular surface, wherein the three reference points are respectively connected with the centroid of the narrowest surface of the femoral neck to form three reference lines, and an included angle between every two adjacent reference lines is 120 degrees;

step S11, acquiring data of an outer side surface profile of a large rotor of the 3D model and designing a model of the plate-like body such that one side of the model of the plate-like body is in close contact with an outer side of the large rotor of the 3D model;

step S12, drawing three reference axes, wherein each reference axis passes through one reference point and is parallel to the central axis;

step S13, extending the three reference axes to the plate-shaped main body model, and designing the model of the first cylinder, the model of the second cylinder and the model of the third cylinder according to the position where the three reference axes pass through the model of the plate-shaped main body;

step S14, the model data of the plate-like body, the model data of the first cylinder, the model data of the second cylinder, and the model data of the third cylinder are arranged and input to a 3D printer to be integrally created.

Technical Field

The invention relates to the technical field of medical instruments, in particular to a femoral nail placing module and a manufacturing method thereof.

Background

The most common clinical fracture is femoral neck fracture, which usually occurs in the elderly over 50 years old. In addition, the incidence of femoral neck fractures in young patients is on the rise in accidents such as high-altitude falls, severe injuries, car accidents, etc. The fracture of the neck of femur is not easy to fix due to the local shearing force.

The femur mainly comprises a femoral head with the upper end facing inwards and upwards and the tail end expanding in a spherical shape, a femoral neck of a thinner part at the outer lower part of the femoral head, and a greater trochanter rising upwards at the junction of the neck bodies. Generally, most of treatment methods for femoral neck fracture are to fix the femoral neck and the greater trochanter through steel plates and fix the greater trochanter, the femoral neck and the femoral head through medical fixing bolts, however, the existing nail placing tool for the femur is often troublesome to produce and has more inconveniences in use, so that the working efficiency of medical staff is greatly reduced, and poor treatment experience is brought to patients; and often comparatively inconvenient in the production process to putting nail guiding tool for thighbone, it is difficult to carry out reasonable adaptation to different patients.

Disclosure of Invention

In view of the above, in order to solve the above problems, the present invention provides a femoral nail placing module, comprising:

a plate-like body disposed in close proximity to an outer surface of a femur of a patient;

the first cylinder is of a cylindrical structure, and one end of the first cylinder is connected with one side, away from the femur, of the plate-shaped main body;

the second column body is of a cylindrical structure, and one end of the second column body is connected with one side, away from the femur, of the plate-shaped main body;

the third cylinder is of a cylindrical structure, and one end of the third cylinder is connected with one side, away from the femur, of the plate-shaped main body;

wherein the plate-shaped main body, the first cylinder, the second cylinder and the third cylinder are of an integrated structure;

the first column body is provided with a first mounting hole along the axial direction, and the first mounting hole penetrates through the first column body and the plate-shaped main body;

the second column body is provided with a second mounting hole along the axial direction, and the second mounting hole penetrates through the second column body and the plate-shaped main body;

and a third mounting hole is formed in the third column body along the axial direction, and the third mounting hole penetrates through the third column body and the plate-shaped main body.

In another preferred embodiment, the inner side of one end of the first mounting hole, which is far away from the plate-shaped main body, is provided with a thread structure; a threaded structure is arranged on the inner side of one end, away from the plate-shaped main body, of the second mounting hole; and a thread structure is arranged on the inner side of one end, far away from the plate-shaped main body, of the third mounting hole.

In another preferred embodiment, the method further comprises: the first guide cylinder, the second guide cylinder and the third guide cylinder are hollow cylindrical structures with two open ends, one end of the first guide cylinder is in threaded connection with the inside of the first mounting hole, one end of the second guide cylinder is in threaded connection with the inside of the second mounting hole, and the third guide cylinder is in threaded connection with the inside of the third mounting hole.

In another preferred embodiment, an inner diameter of the first mounting hole near one end of the plate-shaped body is larger than an inner diameter of the first mounting hole near one end of the first column, an inner diameter of the second mounting hole near one end of the plate-shaped body is larger than an inner diameter of the second mounting hole near one end of the second column, and an inner diameter of the third mounting hole near one end of the plate-shaped body is larger than an inner diameter of the third mounting hole near one end of the third column.

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.

In another preferred embodiment, the plate-shaped body is tightly attached to the outer side of the femur along the vertical direction, and both sides of the lower portion of the plate-shaped body are respectively bent towards the direction close to the femur so that the side of the lower portion of the plate-shaped body close to the femur forms a concave surface which is semi-enclosed on the outer side of the femur.

In another preferred embodiment, the plate-shaped body, the first cylinder, the second cylinder, and the third cylinder are all made of 3D printing material.

In another preferred embodiment, the first guide cylinder, the second guide cylinder and the third guide cylinder are made of metal materials.

A method for manufacturing a femoral nail placing module comprises any one of the femoral nail placing modules, and specifically comprises the following steps:

step S01, scanning the thighbone of a patient and acquiring the scanning data of the thighbone;

step S02, establishing a 3D model of the femur according to the scanning data;

step S03, cutting for a plurality of times along the radial direction of the femoral neck of the 3D model, and obtaining a plurality of corresponding cutting 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 through the coordinates of a plurality of centroids;

step S06, cutting the femoral neck for a plurality of times along the central axis to obtain a plurality of radial surfaces, and selecting one radial surface with the smallest area as the narrowest surface of the femoral neck;

step S07, movably setting a guide pin model on the 3D model, where the guide pin model includes: the needle-shaped model part is arranged in parallel to the central axis;

step S08, projecting the nut model part onto the narrowest surface of the femoral neck along the axial direction of the needle model part, and forming a nut projection round surface;

step S09, moving the nut projection circular surface along the radial direction of the central axis to enable the nut projection circular surface to be in contact with the edge of the narrowest surface of the femoral neck, and recording the central point of the nut projection circular surface as a datum point at the moment when the nut projection circular surface is in contact with the edge of the narrowest surface of the femoral neck;

step S10, forming three reference points at the edge of the narrowest surface of the femoral neck by continuously moving the nut projection circular surface, wherein the three reference points are respectively connected with the centroid of the narrowest surface of the femoral neck to form three reference lines, and an included angle between every two adjacent reference lines is 120 degrees;

step S11, acquiring data of an outer side surface profile of a large rotor of the 3D model and designing a model of the plate-like body such that one side of the model of the plate-like body is in close contact with an outer side of the large rotor of the 3D model;

step S12, drawing three reference axes, wherein each reference axis passes through one reference point and is parallel to the central axis;

step S13, extending the three reference axes to the plate-shaped main body model, and designing the model of the first cylinder, the model of the second cylinder and the model of the third cylinder according to the position where the three reference axes pass through the model of the plate-shaped main body;

step S14, the model data of the plate-like body, the model data of the first cylinder, the model data of the second cylinder, and the model data of the third cylinder are arranged and input to a 3D printer to be integrally created.

Due to the adoption of the technical scheme, compared with the prior art, the invention has the following positive effects: by applying the invention, the fixation treatment of the femoral fracture of the patient can be rapidly and accurately finished, and the femoral head, the greater trochanter and the femoral neck of the patient can form stable connection after the corresponding bolts are arranged in the corresponding mounting holes; the invention has simple structure, convenient design and easy 3D printing production.

Drawings

FIG. 1 is a schematic view of a femoral nail module according to the present invention;

FIG. 2 is a schematic view of a guide pin of a femoral nail placing module according to the present invention;

FIG. 3 is a schematic lateral side view of a femoral nail placement module according to the present invention;

FIG. 4 is a schematic diagram of the cutting of the positioning point of the femoral nail-setting module according to the present invention;

FIG. 5 is a schematic view of the narrowest surface of the femoral neck of a femoral nail placing module according to the present invention;

FIG. 6 is a schematic diagram of a guide pin model of a femoral nail placing module according to the present invention;

FIG. 7 is a schematic diagram of reference point determination for a femoral nail placement module according to the present invention.

In the drawings:

1. a plate-like body; 2. the femur; 11. a first column; 12. a second cylinder; 13. a third column; 111. a first mounting hole; 121. a second mounting hole; 131. a third mounting hole; 3. a first guide cylinder; 4. a second guide cylinder; 5. a third guide cylinder; 6. a first guide pin; 7. a second guide pin; 8. a third guide pin; 21. a femoral neck; 22. the femoral head; 23. a large rotor; 24. a femoral base; 211. cutting the surface; 212. the narrowest face of the femoral neck; 9. a guide pin model; 91. an acicular model section; 92. a nut model section; 921. the projection of the nut is a circular surface; 922. a reference point; 923. a centroid; 924. and positioning points.

Detailed Description

The invention is further described with reference to the following drawings and specific examples, which are not intended to be limiting.

As shown in fig. 1 to 7, there is shown a femoral nail placement module of a preferred embodiment, comprising: a plate-like body 1, the plate-like body 1 being disposed in close contact with an outer surface of a femur 2 of a patient; the first cylinder 11 is of a cylindrical structure, and one end of the first cylinder 11 is connected with one side, away from the femur 2, of the plate-shaped main body 1; the second cylinder 12 is of a cylindrical structure, and one end of the second cylinder 12 is connected with one side, away from the femur 2, of the plate-shaped main body 1; and the third cylinder 13, the third cylinder 13 is a cylindrical structure, and one end of the third cylinder 13 is connected with one side of the plate-shaped main body 1 away from the femur 2. Further, by the close fitting of the plate-shaped body 1 to the outer side of the greater trochanter of the patient's femur 2 and the guiding of the subsequently installed bolt by the first, second and third cylinders 11, 12, 13, the first, second and third cylinders 11, 12, 13 are each operable to insert a bolt and allow the bolt to pass through the greater trochanter and the neck of the femur 2 and be fixed in the head of the femur 2, thereby providing stable fixation of the femur 2 to the patient.

Further, as a preferred embodiment, the plate-shaped body 1, the first column 11, the second column 12 and the third column 13 are of an integrated structure. Further, in the actual production process, the plate-shaped main body 1, the first cylinder 11, the second cylinder 12 and the third cylinder 13 are integrally manufactured by a 3D printer after being designed with the help of computer software.

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 disposed through the first column 11 and the plate-shaped body 1. Further, the subsequent first guide cylinder 3 or the bolt nail is guided and defined in the mounting position by the first mounting hole 111.

Further, as a preferred embodiment, the second cylinder 12 is provided with a second mounting hole 121 along the axial direction, and the second mounting hole 121 is disposed through the second cylinder 12 and the plate-shaped main body 1; further, the subsequent second guide cylinder 4 or bolt nail is guided and defined in the mounting position by the second mounting hole 121.

Further, as a preferred embodiment, the third column 13 is opened with a third mounting hole 131 along the axial direction, and the third mounting hole 131 is disposed through the third column 13 and the plate-shaped main body 1. Further, the subsequent second guide cylinder 4 or bolt nail is guided and defined in the mounting position by the second mounting hole 121.

Further, as a preferred embodiment, the inner side of one end of the first mounting hole 111 far away from the plate-shaped main body 1 is provided with a thread structure; the inner side of one end of the second mounting hole 121 far away from the plate-shaped body 1 is provided with a thread structure; the inner side of the third mounting hole 131 away from one end of the plate-shaped body 1 is provided with a screw structure. Further, the above-mentioned thread structure is formed at the same time as the first, second and third mounting holes 111, 121 and 131 are formed, that is, it is actually represented that threads are formed inside the first mounting hole 111, the second mounting hole 121 and the third mounting hole 131, so as to facilitate the subsequent mounting of the first, second and third guide cylinders 3, 4 and 5.

Further, as a preferred embodiment, the method further comprises: first guide cylinder 3, second guide cylinder 4 and third guide cylinder 5, first guide cylinder 3, second guide cylinder 4 and third guide cylinder 5 are cavity and both ends open-ended cylindric structure, and the one end threaded connection of first guide cylinder 3 is in first mounting hole 111, the one end threaded connection of second guide cylinder 4 is in second mounting hole 121, and third guide cylinder 5 threaded connection is in third mounting hole 131. Further, the outer edge of one end of the first guide cylinder 3 is provided with a thread matched with the thread structure, the outer edge of one end of the second guide cylinder 4 is provided with a thread matched with the thread structure, and the outer edge of one end of the third guide cylinder 5 is provided with a thread matched with the thread structure, so that the medical staff can install the first guide cylinder 3, the second guide cylinder 4 and the third guide cylinder 5 in the first cylinder 11, the second cylinder 12 and the third cylinder 13 respectively through a screwing operation mode; the first guide cylinder 3, the second guide cylinder 4 and the third guide cylinder 5 are preferably made of metal materials, so that the corresponding guide cylinders have higher bending resistance and abrasion resistance; when the corresponding guide pin is drilled at a high speed, the first guide cylinder 3, the second guide cylinder 4 and the third guide cylinder 5 are not easy to break and wear by external force.

In another preferred embodiment, the inner diameter of the end of the first mounting hole 111 near the plate-shaped body 1 is larger than the inner diameter of the end of the first mounting hole 111 near the first cylinder 11, the inner diameter of the end of the second mounting hole 121 near the plate-shaped body 1 is larger than the inner diameter of the end of the second mounting hole 121 near the second cylinder 12, and the inner diameter of the end of the third mounting hole 131 near the plate-shaped body 1 is larger than the inner diameter of the end of the third mounting hole 131 near the third cylinder 13. Further, specifically, the first column 11, the second column 12, the third column 13 and the plate-shaped body 1 are integrated together, the first mounting hole 111, the second mounting hole 121, and the third mounting hole 131 are correspondingly formed at corresponding positions of the corresponding columns and the plate-shaped body 1, respectively, the hole sections of the first mounting hole 111, the second mounting hole 121, and the third mounting hole 131 at the plate-shaped body 1 are proximal ends, respectively, the hole sections of the first mounting hole 111, the second mounting hole 121, and the third mounting hole 131 at the corresponding columns are distal ends, in other words, the proximal ends are located at a side of the plate-shaped body 1 close to the femur, and the distal ends are located in the first column 11, the second column 12, or the third column 13; the diameter of the proximal end is larger than that of the distal end; preferably, the hole section is a channel with a circular cross section, so as to ensure that the guide pin or other structure can not be deformed and abraded due to excessive friction caused by slight deflection and the plate-shaped main body when entering the side of the plate-shaped main body 1 close to the femur.

Further, as a preferred embodiment, when the femur nail placing module is used, the femur nail placing module further comprises a first guide pin 6, a second guide pin 7 and a third guide pin 8 which are used in cooperation with the guide cylinder, wherein the first guide pin 6 is insertably installed in the first guide cylinder 3, the second guide pin 7 is insertably installed in the second guide cylinder 4, and the third guide pin 8 is insertably installed in the third guide cylinder 5. Further, in the actual using process, the medical staff should first preset the plate-shaped main body 1, the first cylinder 11, the second cylinder 12, and the third cylinder 13 according to the condition of the femur 2 of the patient, then attach the plate-shaped main body 1 to the surface of the femur 2 of the patient, then fit and install the first guide cylinder 3, the second guide cylinder 4, and the third guide cylinder 5 made of metal material to the plate-shaped main body 1, and then nail the first guide pin 6, the second guide pin 7, and the third guide pin 8 to the plate-shaped main body 1, the first guide cylinder 4, and the third guide cylinder 5 respectively, thereby completing the preliminary positioning, during the inserting process of the first guide pin 6, the second guide pin 7, and the third guide pin 8 into the femur, the guide pins themselves do not contact with the plate-shaped main body 1, the first cylinder 11, the second cylinder 12, and the third cylinder 13, during the positioning process, the first guide pin 6, the second guide pin 12, and the third cylinder 13 in the femur 2 can be aligned by the CT photographing device, etc, Judging whether the positions of the second guide pin 7 and the third guide pin 8 are correct or not; confirm the location accurate after, screw off first guide cylinder 3 earlier, second guide cylinder 4 and third guide cylinder 5, take off platelike main part 1 again, only remain the first guide pin 6 of location usefulness this moment, second guide pin 7 and third guide pin 8 are connected with the thighbone, then screw in hollow nail along first guide pin 6, second guide pin 7 and third guide pin 8, specifically speaking, the external diameter of guide pin should match with the internal diameter of hollow nail, hollow nail cover is established at first guide pin 6, the thighbone is squeezed into in the outside of second guide pin 7 and third guide pin 8, withdraw from first guide pin 6 at last, second guide pin 7 and third guide pin 8, only remain the fixed hollow nail of screw in thighbone, accomplish the fixed of whole thighbone.

Further, as a preferred embodiment, the first pin 6, the second pin 7, and the third pin 8 can be made of developing materials, or a housing made of developing materials is formed on the surface of the first pin 6, the second pin 7, and the third pin 8, so as to facilitate the medical imaging device to observe the positions of the first pin 6, the second pin 7, and the third pin 8.

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 pin 6, the axis of the second guide pin 7 and the axis of the third guide pin 8 are all arranged in parallel.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope and the implementation manner of the present invention.

The present invention also has the following embodiments in addition to the above:

in a further embodiment of the present invention, the plate-like body 1 is tightly attached to the outer side of the femur 2 along the vertical direction, and both sides of the lower portion of the plate-like body 1 are respectively bent toward the direction close to the femur 2 and make one side of the lower portion of the plate-like body 1 close to the femur 2 form a concave surface, and the concave surface is half-surrounded on the outer side of the femur 2. Further, the plate-shaped main body 1 is made to be attached to the outer side surface of the greater trochanter of the femur 2 as much as possible, so that the plate-shaped main body 1 is prevented from accidentally slipping off during operation of medical staff.

In a further embodiment of the present invention, the plate-shaped body 1, the first cylinder 11, the second cylinder 12, and the third cylinder 13 are all made of 3D printing material. Further, the selected 3D printing material should have a certain hardness after the femur 2 nail placing module is manufactured, and preferably, a PLA plastic printing material may be used.

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 made of metal material.

In a further embodiment of the invention, the upper edge of the plate-like body 1 is arranged in a centrally protruding arc. Furthermore, the treatment experience of the patient is improved, and sharp protrusions are prevented from existing on the outer edge of the plate-shaped main body 1, so that pain of tissue nerves of the patient is prevented.

A method for manufacturing a femoral nail placing module comprises any one of the femoral nail placing modules, and specifically comprises the following steps:

step S01, scanning the femur 2 of the patient and acquiring the scanning data of the femur 2; further, the patient's femur 2 is scanned by X-ray, CT photography, or other techniques to accurately obtain 3D information of the patient's femur 2.

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.

Step S03, cutting for a plurality of times along the radial direction of the femoral neck 21 of the 3D model, and obtaining a plurality of corresponding cutting surfaces 211; further, the medical staff roughly estimates the radial position of the femoral neck 21 part of the femur 2 of the generated 3D model through the operation of the computer software and cuts the femoral neck and correspondingly generates a plurality of cutting surfaces 211.

In another preferred embodiment of step S03, the following operation method may be performed to achieve the same object as that of S03 described above; the medical staff roughly estimates the radial position of the femoral neck 21 of the femur 2 of the generated 3D model through the operation of the computer software, cuts the femoral neck and correspondingly generates at least two initial cutting surfaces 211, during the actual operation, firstly, the point-taking type positioning can be respectively 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 part of the femur base 24 (the end of the femoral neck 21 close to the greater trochanter 23), specifically, the whole 3D model is placed along the vertical direction, and the 3D model is dragged and moved, so that the medical staff can observe the visual angle of one side of the whole femur 2, as the visual angle of fig. 3, three positioning points 924 which do not form a straight line are respectively taken on the lower edge of the femoral head 22 and the femur base 24 through the auxiliary tool such as the computer software, in other words, three positioning points 924 are respectively taken at the two ends of the femoral, and because the outer edge of the femoral neck 21 is arc-shaped, three positioning points 924 can be taken along the upper, middle and lower positions in fig. 3, the three positioning points 924 form a plane passing through the femoral neck 21, the plane is triangular, and the plane extends to cover the whole femoral neck 21 to form the initial cutting plane; two groups of positioning points 924 with three positioning points in each group are cut twice respectively to obtain two initial cutting surfaces 211, the centroids of the two initial cutting surfaces 211 are calculated to confirm the positions, the centroids of the two initial cutting surfaces are connected to form an initial connecting line, and equidistant cutting is performed for a plurality of times along the initial connecting line to form a plurality of required cutting surfaces 211.

Step S04, calculating the area of each cut surface 211, and calculating the coordinates of the centroid 923 of each cut surface 211; further, the area of each cutting surface 211 is calculated and obtained through computer software, and the centroid 923 of each cutting surface 211 is calculated, so that the whole cutting surface 211 can be regarded as a closed non-selfed polygon in the calculation process of the centroid 923, and for the closed non-selfed polygon, the following centroid calculation formula is provided:

and step S05, drawing a central axis passing through the femoral neck through the coordinates of a plurality of centroids. Further, the centroid 923 of each obtained cut surface 211 is recorded and fitted by means of the least square method to form the central axis; in other words, an axis closest to the centroids 923 is obtained through mathematical calculation; in addition, when each cutting surface 211 is generated, the centroid and the area of the cutting surface can be synchronously calculated, the coordinates of the centroids 923 are sequentially recorded, and a straight line closest to the centroids 923 is drawn through computer software, and the straight line is the central axis.

And step S06, cutting the femoral neck for a plurality of times along the central axis to obtain a plurality of radial surfaces, and selecting the radial surface with the smallest area as the narrowest surface of the femoral neck. Further, each of the radial surfaces is perpendicular to the central axis, and the radial surface with the smallest area is used for defining the design of the subsequent manufacturing dimension.

Step S07, movably setting a guide pin model 9 on the 3D model, where the guide pin model 9 includes: a needle model 91 and a nut model 92 connected to one end of the needle model 91, the axis of the needle model 92 being arranged parallel to the central axis; further, the guide pin model 9 is a virtual model preset in software, and the design data is specifically determined by reasonably moving the guide pin model 9, wherein the diameter of the nut model part 92 is larger than that of the needle model part 91, and the diameter of the nut model part 92 is also larger than that of the hollow nail.

Step S08, projecting the nut model 92 onto the narrowest surface 212 of the femoral neck along the axial direction of the needle model 91, and forming a nut projection circle 921; further, the needle model 91 is disposed coaxially with the nut model 92, and the axial direction of the needle model 91 is preferably perpendicular to the above-mentioned femoral neck narrowest surface.

Step S09, moving the nut projection circle 921 along the radial direction of the central axis, so that the nut projection circle 921 contacts with the edge of the narrowest surface 212 of the femoral neck, and recording the center point of the nut projection circle 921 at this time as a reference point 922;

step S10, forming three reference points 922 at the edge of the narrowest surface 212 of the femoral neck by continuously moving the nut projection circular surface 921, wherein the three reference points 922 are respectively connected with the centroid of the narrowest surface of the femoral neck 21 to form three reference lines, and the included angle between every two adjacent reference lines is 120 degrees;

step S11, acquiring data of the outer side surface profile of the large rotor 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 closely attached to the outer side of the large rotor 23 of the 3D model;

step S12, drawing three reference axes, wherein each reference axis passes through a reference point 922 and is parallel to the central axis;

step S13, extending the three reference axes onto the model of the plate-like body 1, and designing 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; the three 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.

Step S14 is to collate 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 to a 3D printer to create a unified body. Further, the plate-shaped main body 1, the first cylinder 11, the second cylinder 12 and the third cylinder 13 are printed and generated at one time through a 3D printer in cooperation with a proper PLC plastic printing material; meanwhile, the corresponding first mounting hole 111, second mounting hole 121 and third mounting hole 131 can be designed and reserved according to the data of the first cylinder 11, the data of the second cylinder 12 and the automatic design of the third cylinder 13.

In conclusion, the invention can be applied to quickly and accurately complete the fixation treatment of the fracture of the femur 2 of the patient, and the femoral head 22, the greater trochanter 23 and the femoral neck 21 of the patient can form stable connection after the corresponding bolts are arranged in the corresponding mounting holes; the invention has simple structure, convenient design and easy 3D printing production.

While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention.