A pelvic bone tumor osteotomy guide plate

Abstract

The present invention relates to the field of medical devices, and in particular to a pelvic bone tumor osteotomy guide and a construction method thereof. The present invention provides a method for constructing a pelvic bone tumor osteotomy guide model, comprising: obtaining a pelvic bone three-dimensional model and an osteotomy line; obtaining a guide cutting fitting surface; extending outward based on the guide cutting fitting surface to construct a guide body model; constructing a first detour model; constructing a second detour model; constructing a reinforcing rib model; constructing a fixed arm model; and constructing a nail channel model on the guide body model. The pelvic bone tumor osteotomy guide provided by the present invention can facilitate surgeons to perform osteotomy according to the preoperative plan during surgery, achieve personalized treatment for each patient, accurately and quickly remove the tumor entity, and can avoid damage to surrounding normal tissue structures to the greatest extent, thereby improving the accuracy of the surgery, reducing the operation time, and facilitating the recovery of patients after surgery.

Description

Technical Field

[0001] The invention relates to the field of medical instruments, and in particular to a pelvic bone tumor osteotomy guide plate and a construction method thereof. Background Art

[0002] The pelvic bone is an irregular bone with many bone anatomy. Pelvic bone tumors are divided into type I: ilium; type II: acetabulum; type III: obturator region; type IV: sacrum according to the involvement of different pelvic bone structures. Refractory pelvic tumors are a good indication for osteotomy guides due to their highly personalized shape and position. Personalized osteotomy guides can guide surgeons to perform osteotomies according to the preoperative plan during surgery, accurately and quickly remove the tumor entity, and can avoid damage to the surrounding normal tissue structure to the greatest extent. However, due to the limitations of manufacturing materials, osteotomy guides are often not rigid structures, and the deformation of the guides during surgery will directly affect the accuracy of the surgical results. In addition, the placement position planned before surgery often lacks a clear and unique bone landmark. The instability of the osteotomy guide position during surgery will cause the osteotomy position direction to deviate from the optimal spatial position in the plan, resulting in surgical errors, and the patient cannot achieve the ideal postoperative effect planned before surgery. The above problems will make it impossible to accurately transfer the preoperative plan to the actual intraoperative situation, so the optimal surgical plan cannot play a role. Summary of the invention

[0003] In view of the above-mentioned shortcomings of the prior art, an object of the present invention is to provide a pelvic bone tumor osteotomy guide plate and a construction method thereof, so as to solve the problems in the prior art.

[0004] To achieve the above-mentioned and other related purposes, the present invention provides, on one hand, a method for constructing a pelvic bone tumor osteotomy guide model, comprising:

[0005] Acquire a pelvic bone three-dimensional model and an osteotomy line, wherein the osteotomy line is located on the outer surface of the iliac wing and extends from the iliac crest to the posterior inferior iliac spine;

[0006] Acquire a guide plate cutting fitting surface, wherein the guide plate cutting fitting surface is a fitting surface formed by translating the osteotomy line along the ilium surface toward the sacroiliac joint direction;

[0007] Based on the cutting and fitting surface of the guide plate extending outward, a guide plate body model is constructed;

[0008] A first detour model is constructed, wherein the first detour model is located near one end of the guide plate body model close to the iliac crest and matches the iliac crest;

[0009] A second detour model is constructed, wherein the second detour model is located near one end of the guide plate body model close to the posterior inferior iliac spine and matches the posterior inferior iliac spine;

[0010] Based on the outer surface of the guide plate body model, the edge close to the osteotomy line is further extended outward to construct a reinforcement rib model;

[0011] A fixed arm model is constructed in the middle of the guide plate body model, the fixed arm model extends from the middle of the guide plate body model to the posterior superior iliac spine, the proximal end of the fixed arm model is connected to the middle of the guide plate body model, and the distal end of the fixed arm model is provided with a third detour model that matches the posterior superior iliac spine;

[0012] The nail track model is constructed on the guide plate body model.

[0013] In some embodiments of the present invention, the three-dimensional bone model includes an ilium, an acetabulum, a ischium, a pubis, and a sacrum.

[0014] In some embodiments of the present invention, the osteotomy line includes a first osteotomy line and a second osteotomy line, the first osteotomy line extends from the iliac crest toward the greater sciatic notch, and the second osteotomy line extends from the inferior iliac spine toward the iliac crest, the angle between the first osteotomy line and the second osteotomy line is 120 to 160°, and the total length of the osteotomy line is 40 to 100 mm.

[0015] In some embodiments of the present invention, the distance that the osteotomy line is translated along the surface of the ilium toward the sacroiliac joint is 10 to 20 mm.

[0016] In some embodiments of the present invention, when constructing the guide plate body model, the extension distance is 5 to 8 mm.

[0017] In some embodiments of the present invention, when constructing the reinforcing rib model, the extension distance is 1.5 to 3 mm.

[0018] In some embodiments of the present invention, the fixed arm model has a length of 20 to 40 mm, a width of 5 to 12 mm, and a thickness of 5 to 8 mm.

[0019] In some embodiments of the present invention, the number of the nail channel model is 3 to 5, the nail channels are cylindrical, and the hole diameter of the nail channels is 4.5 to 5 mm.

[0020] Another aspect of the present invention provides a method for preparing a pelvic bone tumor osteotomy guide plate, the method comprising: constructing a pelvic bone tumor osteotomy guide plate model obtained according to the method for constructing a pelvic bone tumor osteotomy guide plate model, and preparing the pelvic bone tumor osteotomy guide plate.

[0021] Another aspect of the present invention is a pelvic bone tumor osteotomy guide plate, which is constructed by the construction method of the pelvic bone tumor osteotomy guide plate model or prepared by the preparation method of the pelvic bone tumor osteotomy guide plate.

[0022] On the other hand, the present invention provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of the method for constructing a pelvic bone tumor osteotomy guide model or the steps of the method for preparing a pelvic bone tumor osteotomy guide.

[0023] On the other hand, the present invention provides a device, comprising: a processor and a memory, wherein the memory is used to store a computer program, and the processor is used to execute the computer program stored in the memory, so that the device executes the steps of the method for constructing a pelvic bone tumor osteotomy guide plate model, or the steps of the method for preparing a pelvic bone tumor osteotomy guide plate.

[0024] On the other hand, the present invention provides a pelvic bone tumor osteotomy guide, including a guide body for fitting with the surface of the outer side of the iliac wing from the iliac crest to the posterior inferior iliac spine, the guide body is provided with one or more nail channels penetrating the plate body, the guide body includes a first plate body and a second plate body connected by a bending portion, the outer side surface of the guide body is a plane, the upper surface of the guide body is provided with reinforcing ribs along the outer side surface, the buckling end of the first plate body is provided with a first detour portion for buckling the iliac crest, the buckling end of the second plate body is provided with a second detour portion for buckling the posterior inferior iliac spine, and also includes a fixed arm, the fixed arm extends from the middle of the guide body toward the opening direction of the bending portion, and the distal end of the fixed arm is provided with a third detour portion for buckling the posterior superior iliac spine.

[0025] In some embodiments of the present invention, the opening angle of the bending portion is 120-160°.

[0026] In some embodiments of the present invention, the length of the guide plate body is 40-100 mm.

[0027] In some embodiments of the present invention, the guide plate body has a width of 10 to 20 mm.

[0028] In some embodiments of the present invention, the thickness of the guide plate body is 5 to 8 mm.

[0029] In some embodiments of the present invention, the thickness of the reinforcing rib is 1.5 to 3 mm.

[0030] In some embodiments of the present invention, the fixing arm has a length of 20 to 40 mm, a width of 5 to 12 mm, and a thickness of 5 to 8 mm.

[0031] In some embodiments of the present invention, the number of the nail channels is 3 to 5, the nail channels are cylindrical, and the hole diameter of the nail channels is 4.5 to 5 mm. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 Shown is a schematic diagram of the reconstruction model of the present invention.

[0033] Figure 2 Shown is a schematic diagram of the guide plate construction of the present invention.

[0034] Figure 3 Shown is a schematic diagram of the structure of the pelvic bone tumor osteotomy guide plate of the present invention.

[0035] Figure 4 Shown is a schematic diagram of the structure of the pelvic bone tumor osteotomy guide plate of the present invention.

[0036] Figure 5 Shown is a schematic diagram of the structure of the pelvic bone tumor osteotomy guide plate of the present invention.

[0037] Component number description

[0038] 1 Guide body

[0039] 11. First plate

[0040] 111 First Roundabout

[0041] 12 Second board

[0042] 121 Second Detour

[0043] 13 Bending part

[0044] 14 Reinforcement

[0045] 15 Nail Road

[0046] 2 Fixed arm

[0047] 21 The Third Roundabout DETAILED DESCRIPTION

[0048] The following describes the embodiments of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention.

[0049] A first aspect of the present invention provides a method for constructing a pelvic bone tumor osteotomy guide model, comprising:

[0050] S1) obtaining a pelvic bone three-dimensional model and an osteotomy line, wherein the osteotomy line is located on the outer surface of the iliac wing and extends from the iliac crest to the posterior inferior iliac spine;

[0051] S2) obtaining a guide plate cutting fitting surface, wherein the guide plate cutting fitting surface is a fitting surface formed by translating the osteotomy line along the ilium surface toward the sacroiliac joint direction;

[0052] S3) constructing a guide plate body model based on the guide plate cutting and fitting surface extending outward;

[0053] S4) constructing a first detour model, wherein the first detour model is located near one end of the guide plate body model close to the iliac crest and matches the iliac crest;

[0054] S5) constructing a second detour model, wherein the second detour model is located near one end of the guide plate body model close to the posterior inferior iliac spine and matches the posterior inferior iliac spine;

[0055] S6) constructing a reinforcement rib model based on an edge of the outer surface of the guide plate body model close to the osteotomy line and extending outward;

[0056] S7) constructing a fixed arm model in the middle of the guide body model, wherein the fixed arm model extends from the middle of the guide body model toward the posterior superior iliac spine, the proximal end of the fixed arm model is connected to the middle of the guide body model, and the distal end of the fixed arm model is provided with a third detour model matching the posterior superior iliac spine;

[0057] S8) constructing a nail track model on the guide plate body model.

[0058] The method for constructing a pelvic bone tumor osteotomy guide model provided by the present invention may include: obtaining a pelvic bone three-dimensional model and an osteotomy line, wherein the osteotomy line is usually located on the outer surface of the iliac wing and extends from the iliac crest to the posterior inferior iliac spine. The pelvic bone three-dimensional model may usually include parts such as the ilium, acetabulum, ischium, pubis and sacrum, and may also include tissues such as pelvic tumors. The method for constructing a pelvic bone three-dimensional model should be known to those skilled in the art. For example, a pelvic bone three-dimensional model may be constructed using CT and MRI imaging data of the patient using three-dimensional reconstruction software (e.g., Medraw Print, Mimics). The inner side of the iliac wing usually refers to the side of the iliac wing facing the pelvic cavity, and the outer side of the iliac wing refers to the other side of the iliac wing. The osteotomy line may include a first osteotomy line and a second osteotomy line. The first osteotomy line may extend from the iliac crest toward the greater sciatic notch, and the second osteotomy line may extend from the inferior iliac spine toward the iliac crest, and the two intersect. The first osteotomy line and the second osteotomy line are usually curves that can be located on the same plane. The angle between the plane where the first osteotomy line and the second osteotomy line are located and the outer surface of the iliac wing is usually ≤15°. The angle between the first osteotomy line and the second osteotomy line usually refers to the angle between the planes where the first osteotomy line and the second osteotomy line are located. The angle between the first osteotomy line and the second osteotomy line can be 120-160°. The length of the first osteotomy line can be 25-60mm, and the length of the second osteotomy line can be 15-40mm. The total length of the osteotomy line is 40-100mm.

[0059] The method for constructing a pelvic bone tumor osteotomy guide model provided by the present invention may also include: obtaining a guide cutting fitting surface, wherein the guide cutting fitting surface is a fitting surface formed by the overall translation of the osteotomy line along the ilium surface toward the sacroiliac joint. As described above, the formed guide cutting fitting surface is an area on the outer surface of the iliac wing formed by the osteotomy line before translation, the osteotomy line after translation, the iliac crest, and the posterior inferior iliac spine. During translation, the translation distance of each point on the osteotomy line can be adjusted appropriately. For example, the translation distance of the osteotomy line along the ilium surface toward the sacroiliac joint is 10 to 20 mm, that is, the width of the guide cutting fitting surface is 10 to 20 mm. The size of the formed guide cutting fitting surface in the width direction can vary within a certain range, and the width direction of the guide cutting fitting surface is the direction perpendicular to the osteotomy line.

[0060] The method for constructing a pelvic bone tumor osteotomy guide model provided by the present invention may also include: constructing a guide body model based on the outward extension of the guide cutting and fitting surface. The outward extension usually extends the guide cutting and fitting surface away from the pelvic cavity, thereby forming a guide body model of a certain thickness. The specific extension distance may be 5 to 8 mm. The constructed guide body model is generally in the shape of a long strip, with a guide body model bending portion provided in the middle. In the model, the opening of the guide body model bending portion (i.e., the opening formed by the bending of no more than 180°) faces the posterior superior iliac spine.

[0061] The method for constructing a pelvic bone tumor osteotomy guide model provided by the present invention may also include: constructing a first detour model, wherein the first detour model is located near one end of the guide body model close to the iliac crest and cooperates with the iliac crest. The first detour model cooperates with the iliac crest, which usually means that the first detour model is buckled or connected to the iliac crest.

[0062] The method for constructing a pelvic bone tumor osteotomy guide model provided by the present invention may also include: constructing a second detour model, wherein the second detour model is located near one end of the guide body model close to the posterior inferior iliac spine and cooperates with the posterior inferior iliac spine. The cooperation between the second detour model and the posterior inferior iliac spine usually refers to the second detour model being snapped or connected to the posterior inferior iliac spine.

[0063] The method for constructing a pelvic bone tumor osteotomy guide model provided by the present invention may also include: based on the edge of the outer surface of the guide body model close to the osteotomy line, further extending outward to construct a reinforcement rib model. The inner surface of the guide body model usually refers to the side of the guide body model used to fit the outer surface of the iliac wing, and the outer surface of the guide body model refers to the other side relative to the inner surface. The outward extension usually refers to the edge of the outer surface of the guide body model close to the osteotomy line extending in a direction away from the pelvic cavity, thereby forming a reinforcement rib model of a certain thickness, and the specific extension distance can be 1.5 to 3 mm. The formed reinforcement rib model usually also has a certain width, and the width direction of the reinforcement rib model is usually consistent with the width direction of the guide cutting and fitting surface, and the width of the reinforcement rib model can be 1.5 to 3 mm.

[0064] The method for constructing a pelvic bone tumor osteotomy guide model provided by the present invention may also include: constructing a fixed arm model in the middle of the guide body model, the fixed arm model extending from the middle of the guide body model to the posterior superior iliac spine, the proximal end of the fixed arm model is connected to the middle of the guide body model, and the distal end of the fixed arm model is provided with a third detour model that matches the posterior superior iliac spine. The proximal end of the fixed arm model is the end where the fixed arm model is connected to the guide body model, and the distal end of the fixed arm model is the other end of the fixed arm model. The constructed fixed arm model is generally in the shape of a long strip, the length direction of the fixed arm model usually refers to the extension direction of the fixed arm model, the width direction is based on the surface of the iliac wing, and is basically perpendicular to the length direction, and the height direction (corresponding to the thickness) is consistent with the extension direction when constructing the guide body model and / or the reinforcing ribs, and the length of the fixed arm model can be 20 to 40 mm, the width is 5 to 12 mm, and the thickness is 5 to 8 mm.

[0065] The method for constructing a pelvic bone tumor osteotomy guide model provided by the present invention may also include: constructing a nail channel model on the guide body model, wherein the nail channel model usually runs through the guide body model, that is, extends from the inner surface to the outer surface of the guide body model, the number of nail channel models may be 3 to 5, the nail channel models are usually cylindrical, and the aperture of the nail channel models may be 4.5 to 5 mm.

[0066] The second aspect of the present invention provides a method for preparing a pelvic bone tumor osteotomy guide, the method comprising: preparing a pelvic bone tumor osteotomy guide model by constructing a pelvic bone tumor osteotomy guide model obtained by the construction method of the pelvic bone tumor osteotomy guide model provided in the first aspect. The method for preparing a pelvic bone tumor osteotomy guide by constructing a pelvic bone tumor osteotomy guide model obtained by the construction method of the pelvic bone tumor osteotomy guide model provided in the first aspect should be known to those skilled in the art, for example, 3D printing and other methods can be used, and the materials used can be metal (powder), photosensitive resin, etc.

[0067] The third aspect of the present invention provides a pelvic bone tumor osteotomy guide plate, which can be constructed by the construction method of the pelvic bone tumor osteotomy guide plate model provided by the first aspect, or prepared by the preparation method of the pelvic bone tumor osteotomy guide plate provided by the second aspect.

[0068] like Figure 1 , 2 As shown, the present invention provides a pelvic bone tumor osteotomy guide plate, including a guide plate body 1 for fitting with the surface of the outer side of the iliac wing from the iliac crest to the posterior inferior iliac spine. The inner surface of the guide plate body 1 generally refers to the surface of the guide plate body used to fit the outer side of the iliac wing when in use, and the outer surface of the guide plate body 1 refers to the other side surface of the guide plate body 1, that is, the surface of the plate body facing away from the outer side of the iliac wing when in use. The inner surface of the guide plate body 1 can generally be used to fit at least partially with the corresponding part of the outer side of the iliac wing, so that the guide plate body 1 can be stably in contact with the outer side of the iliac wing.

[0069] In the pelvic bone tumor osteotomy guide provided by the present invention, the guide plate body 1 can generally include a first plate body 11 and a second plate body 12 connected by a bending portion 13, and the angle between the extension directions of the first plate body 11 and the second plate body 12 is generally consistent with the opening angle of the bending portion 13, and the opening angle of the bending portion 13 is 120-160°. The length direction of the plate body is generally consistent with its extension direction, for example, the length direction of the first plate body 11 is generally consistent with its extension direction, and the length direction of the second plate body 12 is generally consistent with its extension direction, the length of the first plate body 11 is generally 25-60 mm, and the length of the second plate body 12 is generally 15-40 mm, and the length of the guide plate body 1 (i.e., the total length of the plate body) can be 40-100 mm. The thickness of the plate body refers to the distance between the inner surface and the outer surface of the plate body, and corresponds to the height direction. For example, the thickness of the first plate body 11 refers to the distance between the inner surface and the outer surface of the first plate body 11, and the thickness of the second plate body 12 refers to the distance between the inner surface and the outer surface of the second plate body 12. The thickness of the first plate body 11, the second plate body 12 or the guide plate body 1 can be 5 to 8 mm. Correspondingly, the width direction of the plate body can be determined by the correspondence between its length direction and height direction, and the width of the first plate body 11, the second plate body 12 or the guide plate body 1 can be 10 to 20 mm.

[0070] In the pelvic bone tumor osteotomy guide provided by the present invention, the outer side surface of the guide body 1 is a plane, and the outer side surface of the guide body 1 usually refers to the other side of the guide body 1 relative to the opening of the bending portion 13. The plane is usually consistent with the height direction of the guide body 1. For example, it can be parallel to facilitate the tool to cut along the plane during use, and the plane usually corresponds to the osteotomy line during surgery. The upper surface of the guide body 1 can also be provided with a reinforcing rib 14, and the reinforcing rib 14 is usually arranged along the outer side surface of the guide body 1, so as to further stabilize the tool and increase the strength of the plate body. The thickness of the reinforcing rib 14 is 1.5 to 3 mm, and the width of the reinforcing rib model can be 1.5 to 3 mm. The height direction of the reinforcing rib 14 (corresponding to the thickness) is usually consistent with the height direction of the guide body 1, and the width direction of the reinforcing rib is usually consistent with the width direction of the guide body 1.

[0071] In the pelvic bone tumor osteotomy guide plate provided by the present invention, the buckling end of the first plate body 11 is provided with a first detour portion 111 for buckling the iliac crest, and the first detour portion 111 is usually matched with the shape of the patient's iliac crest. The buckling end of the second plate body 12 is provided with a second detour portion 121 for buckling the posterior inferior iliac spine, and the second detour portion 121 is usually matched with the shape of the patient's posterior inferior iliac spine. The design of the two detour portions can allow the guide plate body 1 to further fit firmly on the outer side of the iliac wing.

[0072] The pelvic bone tumor osteotomy guide provided by the present invention also includes a fixed arm 2, the fixed arm 2 extends from the middle of the guide body 1 to the opening direction of the bent portion 13, the connection end of the fixed arm 2 and the guide body 1 is the proximal end of the fixed arm 2, and the end away from the guide body 1 is the distal end, and the distal end of the fixed arm 2 is provided with a third detour 21 for snapping the posterior superior iliac spine, and the third detour 21 is usually matched with the posterior superior iliac spine of the patient, so that the guide body 1 can be more firmly attached to the outer side of the iliac wing. The length direction of the fixed arm 2 is usually consistent with its extension direction, and the height direction of the fixed arm 2 is consistent with the height direction of the guide body 1. Corresponding to its length direction and height direction, the width direction can be determined, and the length of the fixed arm 2 is 20 to 40 mm, the width is 5 to 12 mm, and the thickness (corresponding to the height direction) is 5 to 8 mm.

[0073] In the pelvic bone tumor osteotomy guide provided by the present invention, the guide body 1 may also be provided with one or more nail channels 15 penetrating the plate body, that is, the nail channels 15 may extend from the inner surface to the outer surface of the guide body 1, the number of the nail channels 15 may be 3 to 5, the nail channels may be cylindrical, and the hole diameter of the nail channels may be 4.5 to 5 mm. The provision of the nail channels allows the guide body 1 to be further fixed to the iliac wing by fixing nails during the operation.

[0074] The fourth aspect of the present invention provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of the method for constructing a pelvic bone tumor osteotomy guide model as described in the first aspect of the present invention, or the steps of the method for preparing a pelvic bone tumor osteotomy guide as described in the second aspect of the present invention.

[0075] The fifth aspect of the present invention provides a device, comprising: a processor and a memory, wherein the memory is used to store a computer program, and the processor is used to execute the computer program stored in the memory, so that the device performs the steps of the method for constructing a pelvic bone tumor osteotomy guide model as provided in the first aspect of the present invention, or the steps of the method for preparing a pelvic bone tumor osteotomy guide as provided in the second aspect of the present invention.

[0076] The pelvic bone tumor osteotomy guide provided by the present invention is a 3D printed pelvic bone tumor osteotomy guide based on image registration and fusion, and is mainly for type I (iliac) pelvic bone tumors. The pelvic bone tumor osteotomy guide provided by the present invention can facilitate the surgeon to perform osteotomy according to the preoperative plan during the operation, realize personalized treatment for each patient, accurately and quickly remove the tumor entity, and can avoid damage to the surrounding normal tissue structure to the greatest extent, improve the accuracy of the operation, reduce the operation time, and facilitate the recovery of the patient after the operation.

[0077] Example 1

[0078] For type II pelvic bone tumors (acetabulum), an osteotomy guide is designed to fit the outside of the iliac wing. The guide fits the anatomical structure of the back of the iliac wing as a whole. At the same time, claw-like structures are designed on the top and back. A nail channel structure is designed on the guide for easy fixation. The outer edge of the guide is designed as a cutting surface, and a section of reinforcing ribs is reserved as an osteotomy orientation groove. The specific steps are as follows:

[0079] Obtain the patient's CT and MRI imaging data, and use 3D reconstruction software (such as Medraw Print, Mimics) to read DICOM data. Use CT data to complete the 3D modeling of bones, use MRI data to complete the 3D reconstruction of pelvic tumors, and use Medraw Print software to register and fuse the two. The established model is as follows Figure 1 As shown. Based on the concepts of imaging and local anatomy, the scope of surgical resection is determined after discussion with the doctor based on the tumor boundary on the fusion image of the two. The surgical cutting range is usually 3cm to 5cm larger than the tumor boundary. The osteotomy line is determined based on the surgical resection range and surrounding important tissues. The osteotomy line is located on the lateral surface of the iliac wing and extends from the iliac crest to the posterior inferior iliac spine.

[0080] The method for constructing the pelvic bone tumor osteotomy guide model is as follows:

[0081] 1) Obtain the 3D model of the pelvic bones and the osteotomy line;

[0082] 2) Obtaining a guide plate cutting fitting surface, wherein the guide plate cutting fitting surface is a fitting surface formed by translating the osteotomy line along the ilium surface toward the sacroiliac joint; the guide plate cutting fitting surface area is designed to have a width of 10 mm to 12 mm, a thickness of 5 mm, and a length of 80 mm;

[0083] 3) Based on the cutting and fitting surface of the guide plate extending outward, a guide plate body model is constructed;

[0084] 4) constructing a first detour model, wherein the first detour model is located near one end of the guide plate body model close to the iliac crest and matches the iliac crest;

[0085] 5) constructing a second detour model, wherein the second detour model is located near one end of the guide plate body model close to the posterior inferior iliac spine and matches the posterior inferior iliac spine;

[0086] 6) Based on the outer surface of the guide body model, the edge of the guide body model near the osteotomy line is extended outward to build a reinforcement rib model with a height of 3 mm;

[0087] 7) A fixed arm model is constructed in the middle of the guide body model, the fixed arm model extends from the middle of the guide body model to the direction of the posterior superior iliac spine, the proximal end of the fixed arm model is connected to the middle of the guide body model, and the distal end of the fixed arm model is provided with a third detour model that matches the posterior superior iliac spine. The fixed arm has a width of 5.5 mm, a thickness of 5 mm, and a length of 35 mm; the fixed arm is fixed to the iliac wing side, so that the guide plate is fixed at three points to prevent the guide plate from falling off and becoming unstable;

[0088] 8) A nail channel model is constructed on the guide plate body model. The number of nail channel models is 4, and the diameter of the nail channel model is 4.5 mm, which is convenient for fixing this personalized osteotomy guide during the osteotomy process. The constructed structure can be seen in Figure 2 ;

[0089] 9) Exporting a personalized osteotomy guide format file and printing the guide, the 3D printing device is a metal printer, and the printing material is metal powder.

[0090] Finally, after printing is completed, the remaining powder and support are removed and sterilized and packaged.

[0091] In summary, the present invention effectively overcomes various shortcomings of the prior art and has high industrial utilization value.

[0092] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed by the present invention shall still be covered by the claims of the present invention.

Claims

1. A method for constructing a pelvic bone tumor osteotomy guide model, comprising: Obtain the patient's CT and MRI imaging data, read the data using 3D reconstruction software, complete the 3D modeling of the bones using the CT data, complete the 3D reconstruction of the pelvic tumor using the MRI data, and use Medraw Print software to register and fuse the two to obtain the 3D model of the pelvic bones and the osteotomy line, which is located on the lateral surface of the iliac wing and extends from the iliac crest to the posterior inferior iliac spine; Acquire a guide plate cutting fitting surface, wherein the guide plate cutting fitting surface is a fitting surface formed by translating the osteotomy line along the ilium surface toward the sacroiliac joint direction; Based on the cutting and fitting surface of the guide plate extending outward, a guide plate body model is constructed; A first detour model is constructed, wherein the first detour model is located near one end of the guide plate body model close to the iliac crest and matches the iliac crest; A second detour model is constructed, wherein the second detour model is located near one end of the guide plate body model close to the posterior inferior iliac spine and matches the posterior inferior iliac spine; Based on the outer surface of the guide plate body model, the edge close to the osteotomy line is further extended outward to construct a reinforcement rib model; A fixed arm model is constructed in the middle of the guide plate body model, the fixed arm model extends from the middle of the guide plate body model to the posterior superior iliac spine, the proximal end of the fixed arm model is connected to the middle of the guide plate body model, and the distal end of the fixed arm model is provided with a third detour model that matches the posterior superior iliac spine; Constructing a nail track model on the guide plate body model; The three-dimensional bone model includes ilium, acetabulum, ischium, pubis and sacrum.

2. The method for constructing a pelvic bone tumor osteotomy guide model according to claim 1, characterized in that: The osteotomy line includes a first osteotomy line and a second osteotomy line. The first osteotomy line extends from the iliac crest to the greater sciatic notch, and the second osteotomy line extends from the inferior iliac spine to the iliac crest. The angle between the first osteotomy line and the second osteotomy line is 120 to 160 degrees, and the total length of the osteotomy line is 40 to 100 mm.

3. The method for constructing a pelvic bone tumor osteotomy guide model according to claim 1, characterized in that: The distance that the osteotomy line moves along the surface of the ilium toward the sacroiliac joint is 10 to 20 mm.

4. The method for constructing a pelvic bone tumor osteotomy guide model according to claim 1, characterized in that: When constructing the guide plate body model, the extension distance is 5 to 8 mm; And / or, when constructing the rib model, the extension distance is 1.5 to 3 mm.

5. The method for constructing a pelvic bone tumor osteotomy guide model according to claim 1, characterized in that: The fixed arm model has a length of 20 to 40 mm, a width of 5 to 12 mm, and a thickness of 5 to 8 mm; And / or, the number of the nail channel models is 3 to 5, the nail channels are cylindrical, and the hole diameter of the nail channels is 4.5 to 5 mm.

6. A method for preparing a pelvic bone tumor osteotomy guide plate, the method comprising: A pelvic bone tumor osteotomy guide plate model is prepared by constructing a pelvic bone tumor osteotomy guide plate model obtained according to the method for constructing a pelvic bone tumor osteotomy guide plate model as described in any one of claims 1 to 5.

7. A pelvic bone tumor osteotomy guide plate, constructed by the method for constructing a pelvic bone tumor osteotomy guide plate model according to any one of claims 1 to 5, or prepared by the method for preparing a pelvic bone tumor osteotomy guide plate according to claim 6.

8. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by the processor, the steps of the method for constructing a pelvic bone tumor osteotomy guide model as described in any one of claims 1 to 5, or the steps of the method for preparing a pelvic bone tumor osteotomy guide as described in claim 6 are implemented.

9. A device comprising: A processor and a memory, wherein the memory is used to store a computer program, and the processor is used to execute the computer program stored in the memory so that the device performs the steps of the method for constructing a pelvic bone tumor osteotomy guide model as described in any one of claims 1 to 5, or the steps of the method for preparing a pelvic bone tumor osteotomy guide as described in claim 6.

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