CN115568984A

CN115568984A - Customized spine vertebral prosthesis based on 3D printing and assembly method thereof

Info

Publication number: CN115568984A
Application number: CN202211062572.3A
Authority: CN
Inventors: 彭文; 杨兆斌; 程才; 胡金旺; 李敏敏; 谢胜芬; 刘珍珍
Original assignee: Guangdong Shitaibao Medical Technology Co ltd
Current assignee: Guangdong Shitaibao Medical Technology Co ltd
Priority date: 2022-09-01
Filing date: 2022-09-01
Publication date: 2023-01-06

Abstract

The invention discloses a customized spine vertebral body prosthesis based on 3D printing and a assembling method thereof. The 3D printing-based customized spine vertebral prosthesis assembly method comprises the following steps: establishing a functional component module library, wherein a plurality of functional component modules are arranged in the functional component module library; simulating a spine skeleton model after operation, and customizing a prosthesis main body model; selecting one or more functional component modules to be combined with the prosthesis main body model according to the operation requirement to obtain a combined model; and printing the assembled model by a 3D printing technology to prepare the spine vertebral body prosthesis. The customized spine vertebral prosthesis based on 3D printing is manufactured by the assembling method disclosed by the invention. The method provided by the invention can simplify the interaction link between the doctor and the engineer, reduce the communication cost of the two parties, reduce the workload brought by updating the whole system, improve the design efficiency and meet the timeliness requirement of the patient on the customized spine vertebral prosthesis.

Description

Customized spine vertebral body prosthesis based on 3D printing and assembly method thereof

Technical Field

The invention relates to the technical field of medical instruments, in particular to a customized spine vertebral body prosthesis based on 3D printing and a assembling method thereof.

Background

Currently, due to the development of 3D printing technology, some clinicians have completed the reconstruction, support and fixation of spinal surgical segments using customized vertebral body prostheses through digital orthopedic related technologies and 3D printing technologies. The 3D printing customized centrum prosthesis is formed by personalized customization aiming at the spine anatomical features of a patient, the parameters of the size, the height, the anatomical form and the like of the centrum prosthesis can be matched with the spine form of the patient, the restoration of the anatomical form and the stability of the centrum prosthesis are facilitated, in addition, most of the main body part of the centrum prosthesis is filled by adopting a porous structure, the early integration of bone tissues and the centrum prosthesis can be promoted by the special biological function formed by the porous structure, and the fusion fixing effect is improved. In addition, the design scheme of the vertebral body prosthesis is completed by a doctor and an engineer together, and special functions can be realized by matching the design scheme of the prosthesis with different surgical approaches and specific schemes.

However, since the planning of the surgical plan and the design of the prosthesis usually require repeated and close communication between the active physician and the engineer, there is usually a great difficulty in the process due to the difference between the knowledge backgrounds of the two. In addition, in the prior art, the design of the vertebral body prosthesis is completed from the beginning to the end in a curved surface fitting mode by simulating a postoperative bone model of a patient, and the problem that whether the prosthesis designed by the method is different or not matched with a normalized internal fixing device matched with the prosthesis and the actual bone form of the patient is the key in the prosthesis design link is solved. This inevitably lengthens product design time and ultimately makes it difficult to meet the patient's need for the timeliness of custom prostheses, especially for patients who are in urgent need of surgery.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides a customized spine vertebral body prosthesis based on 3D printing and a assembling method thereof.

The solution of the invention for solving the technical problem is as follows:

a method for assembling a customized spine vertebral body prosthesis based on 3D printing comprises the following steps:

establishing a functional component module library, wherein a plurality of functional component modules are arranged in the functional component module library;

simulating a spine skeleton model after operation, and customizing a prosthesis main body model;

selecting one or more functional component modules to be combined with the prosthesis main body model according to the operation requirement to obtain a combined model;

and printing the assembled model by a 3D printing technology to prepare the spine vertebral body prosthesis.

The invention has at least the following beneficial effects: in the design process of the customized spine vertebral body prosthesis, a main doctor designates an operation scheme, necessary functional component modules are selected from the functional component module library, communication between the main doctor and an engineer is embodied in a menu mode, the link of medical interaction is simplified, and the communication cost of the two parties is reduced; moreover, because the functional component module library is established, the prosthesis main body module can be quickly combined with the required functional component module, the workload of an engineer in the process of designing the spine vertebral body prosthesis can be reduced, the design efficiency is improved, and the timeliness requirement of a patient on the customized spine vertebral body prosthesis is met; in addition, under the condition that the functional component module cannot meet the actual requirement in the design process, the functional component module can be independently redesigned by an engineer according to the requirement of a main surgeon without redesigning the whole spine vertebral prosthesis, so that the workload brought by updating the spine vertebral prosthesis system is reduced, and the time required by updating is also reduced.

As a further improvement of the above technical solution, the step of simulating the post-operative spinal bone model, and customizing the prosthesis body model, comprises the steps of:

simulating the post-operative spinal bone model by a computer;

and establishing a frame model and a porous filling structure model according to the shape of the spine skeleton model, wherein the frame model is connected with the porous filling structure model.

The spine skeleton model after the operation is simulated by the computer, the prosthesis main body model can be more accurately customized, and the frame model and the porous filling structure model are combined to form the basis of the prosthesis main body model; after 3D printing, the frame model can be made into a solid frame, so that the effect of bearing stress is achieved, the surface edge of the vertebral prosthesis of the spine is wrapped, and the tissues such as nerves, blood vessels and the like of a user are prevented from being scratched by sharp edges; and porous filling structure model can make porous filling structure through 3D printing, can play the effect of bearing the weight of the stress, still plays important role to osteogenesis induction and bone ingrowth.

As a further improvement of the above technical solution, the step of simulating the post-operative spinal bone model by the computer comprises the steps of:

reversely modeling the adjacent vertebral bodies through CT acquisition to obtain the surface structures of the adjacent vertebral bodies;

and obtaining the spine skeleton model through the surface structures of the adjacent vertebral bodies, wherein the upper surface and the lower surface of the spine skeleton model are attached to the surface structures of the adjacent vertebral bodies.

The reverse modeling of adjacent centrum is carried out through CT acquisition, the surface structure of the adjacent centrum is obtained, the spine bone model which is attached to the surface structure of the adjacent centrum is further obtained, the spine bone after operation can be more accurately analyzed and simulated, the spine bone model which meets the requirements of the operation is obtained, and therefore the spine centrum prosthesis which is attached to the surface of the adjacent centrum can be manufactured, and the manufacturing precision of the spine centrum prosthesis is improved.

As a further improvement of the above technical solution, the step of simulating a post-operative spinal bone model, customizing the prosthesis body model, further comprises the steps of:

setting bone grafting holes on the porous filling structure model, wherein the bone grafting holes penetrate through the upper surface and the lower surface of the porous filling structure model;

and arranging a circulation hole on the peripheral wall surface of the porous filling structure model.

The bone grafting hole is beneficial to containing broken bones, and the arrangement of the circulation hole is beneficial to the circulation and exchange of blood and tissue fluid, thereby playing an important role in osteogenesis induction and bone ingrowth.

As a further improvement of the above technical solution, the functional component module includes: the vertebral body nail module, the nail rod system module and the nail plate system module.

The vertebral body nail module and the prosthesis main body model are combined to obtain an assembly model, and a vertebral column vertebral body prosthesis for guiding the implantation of the first vertebral body nail can be manufactured; the assembled model obtained by combining the nail rod system module and the prosthesis main body model can be used for manufacturing the spine vertebral prosthesis stably connected with the nail rod system; the spinal vertebral prosthesis with the nail plate can be manufactured by an assembly model obtained by combining the nail plate system module and the prosthesis main body model, and a second vertebral nail can be guided to be implanted; the three functional component modules of the vertebral body nail module, the nail rod system module and the nail plate system module are arranged, so that various combinations with the prosthesis main body model can be realized, the obtained assembled model can cover all requirements of reconstruction of the currently common vertebral body prosthesis, and the combined model has good applicability in clinical application.

As a further improvement of the above technical solution, the step of selecting one or more functional component modules to combine with the prosthesis main body model according to the surgical requirements to obtain a combined model comprises the following steps:

determining the implantation direction, position and quantity of the first vertebral nail;

determining the relative position and the number of the vertebral body nail modules on the prosthesis main body model according to the implantation direction, the position and the number of the first vertebral body nails;

and in the three-dimensional modeling, the vertebral nail module and the prosthesis main body model are operated to obtain the intersection part of the vertebral nail module and the prosthesis main body model, and the assembly model is generated.

The assembled model of the vertebral body nail module and the prosthesis main body model can be obtained through the steps, and the manufactured vertebral body prosthesis can guide the implantation of the first vertebral body nail so as to realize the connection between the vertebral body prosthesis and the adjacent vertebral body.

determining the implantation direction, position and number of pedicle screws in the screw-rod system;

determining the relative position and number of the nail-bar system module on the prosthesis main body model according to the implantation direction, position and number of pedicle screws in the nail-bar system;

and in the three-dimensional modeling, the nail rod system module and the prosthesis main body model are operated to obtain the intersection part of the nail rod system module and the prosthesis main body model, and the assembly model is generated.

The assembled model of the screw rod system module and the prosthesis main body model can be obtained through the steps, and the manufactured spine vertebral prosthesis can be matched with the pedicle screws in the screw rod system, so that the spine vertebral prosthesis is connected with the adjacent vertebral bodies.

As a further improvement of the above technical solution, the step of selecting one or more functional component modules to combine with the prosthesis main body model according to the surgical requirements to obtain an assembled model comprises the following steps:

determining the surface structure of the nail plate system through the surface structures of the adjacent vertebral bodies;

determining the position of the nail plate system according to the surgical approach;

cutting the nail plate system module according to the surface structure of the adjacent vertebral bodies and the position of the nail plate system;

arranging a through hole on the nail plate system module;

and combining the nail plate system module with the frame model to generate the assembly model.

The assembled model of the nail plate system module and the prosthesis main body model can be obtained through the steps, the manufactured spine vertebral prosthesis is provided with the nail plate and can guide the implantation of the nail of the second vertebral body, and the nail plate can be attached to the surface structure of the adjacent vertebral body to realize the connection between the spine vertebral prosthesis and the adjacent vertebral body.

As a further improvement of the technical scheme, the method for assembling the customized spine vertebral body prosthesis based on 3D printing further comprises the following steps:

and reinforcing the obtained assembly model.

By reinforcing the assembled model, the failure of the whole system caused by the insecure connection position of the functional component module and the prosthesis main body model can be avoided.

The customized spine vertebral body prosthesis based on 3D printing is manufactured by the method for assembling the customized spine vertebral body prosthesis based on 3D printing according to any one of the technical schemes.

Because the spine vertebral prosthesis is prepared by the assembling method, the manufacturing timeliness is high, the workload of an engineer is reduced, the requirements of a doctor and a patient on the condition of an illness can be met, and the precision is high.

Drawings

In order to more clearly illustrate the technical solution in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below. It is clear that the described figures are only some embodiments of the invention, not all embodiments, and that a person skilled in the art can also derive other designs and figures from them without inventive effort.

FIG. 1 is a flow chart of a method for assembling a customized spine vertebral body prosthesis based on 3D printing according to an embodiment of the present invention;

FIG. 2 is a detailed flowchart in the embodiment of step S200 in FIG. 1;

FIG. 3 is a detailed flowchart in the embodiment of step S220 in FIG. 2;

FIG. 4 is a detailed flowchart of the vertebral nail selecting module in the embodiment of step S300 in FIG. 1;

FIG. 5 is a detailed flow chart of the optional nailing rod system module in the embodiment of step S300 in FIG. 1;

FIG. 6 is a detailed flow chart of the optional pegboard system module in the embodiment of step S300 of FIG. 1;

FIG. 7 is a schematic structural view of a prosthesis body model according to an embodiment of the present invention;

FIG. 8 is a schematic structural view of a prosthesis body model from another angle according to an embodiment of the present invention;

FIG. 9 is a schematic structural view of a vertebral nail module according to an embodiment of the present invention;

FIG. 10 is a front view of a vertebral body nail module according to an embodiment of the present invention;

FIG. 11 isbase:Sub>A sectional view taken along line A-A of FIG. 10;

FIG. 12 is a schematic structural view of an assembled model obtained by combining a vertebral nail module with a prosthesis main body model according to an embodiment of the invention;

FIG. 13 is a schematic view of the assembled model of the vertebral nail module and the prosthesis body model in another view;

FIG. 14 is a schematic structural view of a staple bar system module of an embodiment of the present invention;

FIG. 15 is a front view of a staple bar system module of an embodiment of the present invention;

FIG. 16 is a sectional view taken along line B-B of FIG. 15;

FIG. 17 is a schematic structural view of a assembled model obtained by combining a staple bar system module with a prosthesis body model according to an embodiment of the present invention;

FIG. 18 is a schematic structural view of a combined model obtained by combining a nail rod system module and a prosthesis main body model according to an embodiment of the invention at another angle;

FIG. 19 is a schematic structural view of a nail plate system module according to an embodiment of the present invention;

FIG. 20 is a schematic structural view of a nail plate system module after cutting according to an embodiment of the invention;

FIG. 21 is a schematic structural view of a assembled model obtained by combining a nail plate system module with a prosthesis main body model according to an embodiment of the present invention;

FIG. 22 is a schematic structural view of a assembled model obtained by combining a staple board system module with a prosthesis body model according to an embodiment of the present invention at another angle.

Reference numerals: 600. a prosthesis body model; 610. a frame model; 620. a porous filling structure model; 621. bone grafting holes; 622. a flow-through hole; 700. a vertebral body nail module; 710. a first central through hole; 800. a nail rod system module; 810. a guide circular tube; 811. a second central through hole; 820. matching with a circular tube; 900. a pegboard system module.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments to be described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and larger, smaller, larger, etc. are understood as excluding the number, and larger, smaller, inner, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.

It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and those skilled in the art can obtain other embodiments without inventive effort based on the embodiments of the present invention, and all embodiments are within the protection scope of the present invention. The technical characteristics of the invention can be combined interactively on the premise of not conflicting with each other.

Referring to fig. 1 to 22, the embodiment of the invention provides an assembly method of a customized spine vertebral body prosthesis based on 3D printing, which can rapidly manufacture a spine vertebral body prosthesis satisfying functional requirements, improve the efficiency of customizing the spine vertebral body prosthesis, and reduce the workload of an engineer.

Fig. 1 is a flowchart of a method for assembling a customized spine vertebral body prosthesis based on 3D printing according to an embodiment of the present invention, wherein the method includes step S100, step S200, step S300, step S400 and step S500.

Step S100, building a functional component module library. It is understood that a variety of feature modules are provided in the feature module library, and in this embodiment, the feature modules in the feature module library include, but are not limited to, the vertebral nail module 700, the rod system module 800, and the nail plate system module 900.

It is noted that the library of functional component modules created in this embodiment may be used repeatedly in a process of customizing a spinal vertebral prosthesis numerous times.

Step S200, simulating a spine skeleton model after operation, and customizing a prosthesis main body model 600. It is understood that the prosthesis body model 600 can be printed by 3D technology to form a prosthesis body, and in this embodiment, the step S200 at least includes the steps S210 and S220.

In step S210, a post-operation spine bone model is simulated by a computer. Specifically, referring to fig. 3, step S210 includes step S211, and step S212. Step S211, reversely modeling the adjacent vertebral bodies through CT acquisition to obtain the surface structures of the adjacent vertebral bodies; in step S212, a spinal bone model is obtained from the surface structure of the adjacent vertebral bodies.

It can be understood that the upper surface and the lower surface of the obtained spine bone model are respectively attached to the surface structures of the adjacent vertebral bodies, and through the steps S211 and S212, the spine bone after the operation can be more accurately analyzed and simulated, so that the spine bone model more meeting the operation requirements can be obtained, and the spine vertebral body prosthesis attached to the surfaces of the adjacent vertebral bodies can be manufactured.

Step S220, building a frame model 610 and a porous filling structure model 620 according to the morphology of the spine skeleton model. It is understood that the frame model 610 is connected to the porous filling structure model 620, the frame model 610 can be printed by 3D printing technology to form a solid frame, and the porous filling structure model 620 can be printed by 3D printing technology to form a porous filling structure.

The solid frame plays a role in bearing stress, and can wrap the surface edge of the vertebral column vertebral prosthesis, so that the sharp edge is prevented from scratching tissues such as nerves, blood vessels and the like of a user. The porous filling structure is a special pore structure formed by lattice structures such as a diamond structure, an octahedral structure, a dodecahedral structure and the like, can play a role in bearing stress, and also plays an important role in osteogenic induction and bone ingrowth.

In some embodiments, step S200 further includes step S230 and step S240, depending on the actual surgical requirements. In step S230, bone grafting holes 621 are disposed on the porous filling structure model 620; in step S240, the flow holes 622 are formed in the outer peripheral wall surface of the porous packing structure model 620. It is understood that the order of steps S230 and S240 may be changed.

It is understood that the bone grafting holes 621 penetrate the upper and lower surfaces of the porous filling structure mold 620, and the shape of the bone grafting holes 621 may be irregular according to the surgical requirements, which are used to receive the crushed bone. One or more of the circulation holes 622 may be provided according to actual requirements, the number and shape of the circulation holes 622 are not limited in particular, the circulation holes 622 are provided to facilitate the circulation and exchange of blood and interstitial fluid, and in this embodiment, the circulation holes 622 are circular holes with a diameter of 2 to 3 mm.

Referring to fig. 2, the step S200 of the present embodiment includes both the steps S210 and S220 and the steps S230 and S240, and the obtained prosthesis body model 600 may be provided with both the frame model 610 and the porous filling structure model 620, and the bone grafting holes 621 and the flow holes 622, as shown in fig. 7 and 8.

Step S300, selecting one or more functional component modules to be combined with the prosthesis main body model 600 according to the operation requirements to obtain a combined model. In this embodiment, the prosthetic body model 600 may be combined with one or more of the vertebral nail module 700, the nail rod system module 800, and the nail plate system module 900 to form a composite model that meets the needs of the procedure.

Wherein the assembled model obtained by combining the vertebral body nail module 700 with the prosthesis body model 600 has a channel capable of guiding the implantation of the first vertebral body nail, which comprises at least steps S311, S312 and S313, referring to fig. 4, by performing step S300.

In step S311, the implantation direction, position and number of the first vertebral body nail are determined.

In step S312, the relative position and number of the vertebral nail module 700 on the prosthesis body model 600 are determined according to the implantation direction, position and number of the first vertebral nail.

Step S313, in the three-dimensional modeling, the vertebral body nail module 700 and the prosthesis body model 600 are operated, the intersection portion of the vertebral body nail module 700 and the prosthesis body model 600 is obtained and merged with the frame model 610, and a channel for guiding the implantation of the first vertebral body nail is generated.

Referring to fig. 9 to 11, the vertebral body nail module 700 is a circular tube structure, and is provided with a first central through hole 710, the diameter of the first central through hole 710 and the length of the circular tube are determined by the specification of the first vertebral body nail, and the vertebral body nail module 700 may also be provided with a step structure on the hole wall of the central through hole according to actual requirements.

It will be appreciated that, depending on the actual condition of the patient and the requirements of the physician, the engineer, after determining the implantation direction, location and number of the first vertebral nail, can determine the relative location and number of the vertebral nail modules 700 in the prosthesis body model 600. By performing step S313, a fitting model having a passage capable of guiding the implantation of the first vertebral nail can be obtained, as shown in fig. 12 and 13.

It is understood that the pedicle screws are provided in the rod-and-nail system, and the assembly model obtained by combining the rod-and-nail system module 800 with the prosthesis body model 600 has passages capable of cooperating with the pedicle screws in the rod-and-nail system by performing step S300, which includes at least step S321, step S322 and step S323 with reference to fig. 5.

And S321, determining the implantation direction, position and quantity of the pedicle screws in the screw-rod system.

In step S322, the relative position and number of the nail rod system module 800 on the prosthesis body model 600 are determined according to the implantation direction, position and number of pedicle screws in the nail rod system.

Step S323, in the three-dimensional modeling, the nail rod system module 800 and the prosthesis body model 600 are operated to obtain the intersection portion of the nail rod system module 800 and the prosthesis body model 600, and the intersection portion is combined with the frame model 610 to generate a channel for guiding the implantation of the nail rod system.

Referring to fig. 14 to 16, the rod and nail system module 800 in this embodiment is composed of two coaxial circular tubes, namely a guide circular tube 810 and a mating circular tube 820, wherein the guide circular tube 810 is provided with a second central through hole 811, the mating circular tube 820 is provided with a third central through hole, the mating circular tube 820 is sleeved on the outer peripheral wall surface of the guide circular tube 810, and the diameter and length of the second central through hole 811 of the guide circular tube 810 are determined by the specification of the pedicle screw used in the operation. It will be appreciated that the wall of the second central through hole 811 of the guiding round tube 810 may also be provided with a thread structure according to practical requirements.

The relative position and number of the nail and rod systems on the prosthesis body model 600 can be determined according to the actual condition of the patient and the requirements of the doctor, in combination with the structure of the nail and rod system. By performing step S323, a channel for guiding pedicle screw connection, that is, a channel for guiding the implantation of the nail-bar system, can be generated on the prosthesis body model 600, and an assembly model of the combination of the nail-bar system module 800 and the prosthesis body model 600 is obtained, as shown in fig. 17 and 18.

By performing step S300, the assembled model obtained by combining the staple plate system module 900 with the prosthesis body model 600 has a channel capable of guiding the implantation of the staples of the second vertebral body, which, referring to fig. 6, includes at least step S331, step S332, step S333, step S334 and step S335.

Step S331, determining the surface structure of the nail plate system from the surface structures of the adjacent vertebral bodies. It will be appreciated that the adjacent vertebral bodies have been inversely modeled by the CT acquisition in step S211, the surface structure of the adjacent vertebral bodies is obtained, and a pegboard system conforming to the surface of the adjacent vertebral bodies can be made based on the surface structure of the adjacent vertebral bodies.

And step S332, determining the position of the nail plate system according to the surgical access.

Step S333, cutting the nail plate system module 900 according to the surface structure of the adjacent vertebral bodies, the position of the nail plate system and the surgical approach. According to the surgical approach, the position of the nail plate system on the spine vertebral body prosthesis is determined to determine the position of the nail plate system module 900 on the prosthesis main body model 600, and the corresponding nail plate system module 900 is cut out, wherein the nail plate system module 900 before cutting out is shown in fig. 19, and the nail plate system module 900 after cutting out is shown in fig. 20.

In step S334, a through hole is provided in the plate system module 900 to create a channel for guiding the implantation of the second vertebral nail.

In step S335, the pegboard system module 900 is merged with the frame model 610. It will be appreciated that the pegboard system module 900 is disposed outside of the prosthetic body model 600 and is capable of conforming to the surface structure of the adjacent vertebral bodies.

It will be appreciated that the second vertebral body is stapled for implantation to the adjacent vertebral bodies, as distinguished from the passageways created in step S313, the passageways created in step S334 are located on the staple board system module 900, since the staple board system module 900 is disposed outside of the prosthetic body model 600, i.e., the passageways created in step S334 are located on the outwardly extending structure of the prosthetic body model 600, as shown in fig. 21 and 22.

It will be appreciated that the through-holes in the plate system module 900 are determined by the gauge of the second vertebral nail used in the procedure.

It will be appreciated that the prosthetic body model 600 may be combined with one or more of the vertebral nail module 700, the nail rod system module 800 and the nail plate system module 900 to form a modular assembly model to meet the needs of the procedure, including all of the steps of combining the functional component modules used with the prosthetic body model 600 when the prosthetic body model 600 is combined with a variety of functional component modules.

For example, when it is required to combine the vertebral nail module 700, the nail rod system module 800, and the nail plate system module 900 with the prosthesis body model 600, to obtain a combined model having a channel for guiding the implantation of the first vertebral nail, a channel for guiding the implantation of the pedicle screw in the nail rod system, and a channel for guiding the implantation of the second vertebral nail, it is required to perform steps S311, S312, S321, S322, S323, and steps S331, S332, S333, S334, S335.

And step S400, reinforcing the obtained assembly model.

It is understood that when the prosthesis body model 600 and the functional component module are combined with each other, the functional component module should be combined with the frame model 610 of the prosthesis body model 600 as required, and necessary reinforcement should be performed for the joint position to avoid the failure of the whole system due to the insecure joint position.

And S500, printing the assembled model by a 3D printing technology to manufacture the spine vertebral body prosthesis.

It can be understood that in the operation of partial total resection and total resection of the vertebral body of the vertebral column, the vertebral body prosthesis of the vertebral column, which can be manufactured by the method of the embodiment, covers all the requirements of the reconstruction of the vertebral body prosthesis commonly used at present, and has good applicability in clinical application.

In the design process of customizing the spine vertebral body prosthesis, a main doctor formulates a set operation scheme, and selects necessary functional component modules from a functional component module library, so that the communication between the main doctor and an engineer is embodied in a menu form, the link of medical interaction is simplified, the communication cost of two parties is reduced, the communication time is saved, the understanding of the two parties to the other party is enhanced, and the problem of difficult interaction due to different knowledge backgrounds of the two parties is solved.

Moreover, simple matching operation is carried out by the prosthesis main body model 600 and the modularized and normalized functional component module in a three-dimensional model mode, so that the workload of engineers in the prosthesis design process can be reduced, the design efficiency is further improved, and the timeliness requirement of a patient on the customized spine vertebral prosthesis is met.

If the functional component module cannot meet the actual requirement in the process of designing the spine vertebral body prosthesis, an engineer can singly redesign the functional component module according to the requirement of a doctor, then a new assembly model is obtained according to the step S300, and then the step S400 and the step S500 are carried out, so that the whole spine vertebral body prosthesis does not need to be redesigned, the step S200 does not need to be carried out again, the workload brought by updating of the whole system is reduced, and the time required by updating is also reduced.

The embodiment of the invention also provides a customized spine vertebral prosthesis based on 3D printing, which is manufactured by the method provided by one of the embodiments, the generated assembled model is printed by a 3D printing technology to form the spine vertebral prosthesis in the embodiment, the requirements of doctors and patients on illness conditions can be met, the manufacturing timeliness is high, and the workload of engineers is reduced.

It can be understood that the spine vertebral body prosthesis printed by the 3D technology includes a prosthesis main body, the prosthesis main body of the embodiment is provided with bone grafting holes 621, which is beneficial to accommodating broken bones, and a circulation hole 622 can be provided according to actual requirements, which is beneficial to the circulation and exchange of blood and tissue fluid.

It can be understood that, the customized spine vertebral body prosthesis based on 3D printing of the present embodiment can set a channel for guiding the implantation of the first vertebral body nail according to actual requirements, and during the operation, the first vertebral body nail can be used to stably connect the spine vertebral body prosthesis with the adjacent vertebral body of the patient.

The vertebral column vertebral body prosthesis can be used for being matched with the vertebral pedicle screws in the screw rod system according to actual requirements, the vertebral pedicle screws of the screw rod system can be connected with the vertebral column vertebral body prosthesis in the operation process, and the vertebral column vertebral body prosthesis and the adjacent vertebral bodies are fixed in position through the vertebral pedicle screws.

Spinal centrum prosthesis can also set up the nail board according to actual demand to set up the passageway that is used for guiding the implantation of second centrum nail on the nail board, in the design process, select to make up nail board system module 900 and prosthesis main body model 600, nail board system module 900 forms the nail board of setting in the prosthesis main body outside through 3D after printing. During the operation, the nail plate can be inosculated with the adjacent vertebral bodies, and the spine vertebral body prosthesis can be stably connected with the adjacent vertebral bodies by using the second vertebral body nail.

While the preferred embodiments of the present invention have been illustrated and described, it will be understood by those skilled in the art that the present invention is not limited to the details of the embodiments shown and described, but is capable of numerous equivalents and substitutions without departing from the spirit of the invention as set forth in the claims appended hereto.

Claims

1. A method for assembling a customized spine vertebral body prosthesis based on 3D printing is characterized by comprising the following steps:

2. A method of assembling a customized spine vertebral body prosthesis based on 3D printing as claimed in claim 1 wherein said step of simulating a post-operative spine bone model, customizing a prosthesis body model comprises the steps of:

simulating the post-operative spinal bone model by a computer;

3. The method for assembling a customized spine vertebral body prosthesis based on 3D printing as claimed in claim 2, wherein the step of simulating the spine bone model after surgery by a computer comprises the steps of:

4. The method for assembling a customized spine vertebral body prosthesis based on 3D printing as claimed in claim 2, wherein the step of simulating a post-operative spine bone model, customizing a prosthesis body model further comprises the steps of:

5. A method of assembling a customized spine vertebral prosthesis based on 3D printing as claimed in claim 3 wherein said functional component modules comprise: the vertebral body nail module, the nail rod system module and the nail plate system module.

6. The method for assembling the customized spine vertebral body prosthesis based on 3D printing as claimed in claim 5, wherein the step of selecting one or more functional component modules to be combined with the prosthesis main body model according to surgical requirements to obtain an assembled model comprises the following steps:

determining the implantation direction, position and quantity of the first vertebral body nail;

7. The method for assembling the customized spine vertebral body prosthesis based on 3D printing as claimed in claim 5, wherein the step of selecting one or more functional component modules to be combined with the prosthesis main body model according to surgical requirements to obtain an assembled model comprises the following steps:

determining the implantation direction, position and quantity of pedicle screws in the screw-rod system;

determining the relative position and number of the screw rod system modules on the prosthesis main body model according to the implantation direction, position and number of pedicle screws in the screw rod system;

8. The method for assembling the customized spine vertebral body prosthesis based on 3D printing as claimed in claim 5, wherein the step of selecting one or more functional component modules to be combined with the prosthesis main body model according to the surgery requirements to obtain the assembly model comprises the following steps:

determining the position of the staple plate system according to the surgical approach;

arranging a through hole on the nail plate system module;

9. The method for assembling a customized spinal vertebral prosthesis based on 3D printing as recited in claim 1, further comprising the steps of:

and reinforcing the obtained assembly model.

10. A customized spine vertebral body prosthesis based on 3D printing, which is manufactured by the assembly method of the customized spine vertebral body prosthesis based on 3D printing according to any one of claims 1 to 9.