CN107569309B - Vertebral prosthesis capable of being implanted into long bone - Google Patents
Vertebral prosthesis capable of being implanted into long bone Download PDFInfo
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- CN107569309B CN107569309B CN201710710723.4A CN201710710723A CN107569309B CN 107569309 B CN107569309 B CN 107569309B CN 201710710723 A CN201710710723 A CN 201710710723A CN 107569309 B CN107569309 B CN 107569309B
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Abstract
The invention provides a vertebral body prosthesis capable of being implanted into long bones, which comprises a vertebral body main body with a bone grafting groove, wherein the bone grafting groove is provided with an opening for placing bone strips, a bone grafting groove cover plate is detachably arranged on the opening, the vertebral body main body is connected with a marrow cavity protection plate, the marrow cavity protection plate is fixed with a physiological vertebral body of a human body through a posterior nail rod fixing system, the upper end and the lower end of the vertebral body main body also respectively comprise an upper end plate and a lower end plate, and the vertebral body main body is of a three-dimensional communicated porous structure. The beneficial effects of the invention are as follows: can be implanted into long-segment bones for replacing the vertebral bodies of the damaged spinal column, and has good postoperative bone ingrowth characteristics so as to realize long-term osseous fusion.
Description
Technical Field
The invention relates to the field of orthopedic implantation, in particular to a vertebral prosthesis capable of being implanted into long bones.
Background
In the treatment of human spinal diseases, spinal nerve damage may be caused by damage to vertebral bodies due to spinal tumors, tuberculosis and serious fracture, and vertebroplasty has to be performed, the stability of the vertebral column after vertebroplasty needs to be reconstructed, and the appearance of artificial vertebroplasty provides an ideal method for treating the diseases. Since the first report of tumor removal of the vertebral body and replacement with a prosthesis, artificial vertebral bodies have been widely used clinically as an effective vertebral body replacement since the last 60 th century. However, it has been shown in clinical applications and in a series of biomechanical tests that conventional artificial vertebral bodies have some problems to be solved in some respects.
In the prior art, autogenous or allogeneic bone particles are implanted to facilitate postoperative osseointegration, but if the vertebral body segment to be replaced is long, autogenous bone particles with enough volume are difficult to obtain, and the high cost of implanting allogeneic bone particles is also difficult to bear and has limited sources, which brings great difficulty to the subsequent establishment of complete osseointegration within the whole length range of the artificial vertebral body segment; secondly, in order to ensure the bone quantity of the central bone grafting hole, the design area of the upper and lower end plates of the artificial vertebral body is reduced, and the artificial vertebral body is sunk into the end plates of the upper and lower vertebral bodies due to insufficient supporting force, so that the phenomenon of subsidence occurs, and the ideal height is finally lost.
Disclosure of Invention
The invention overcomes the defects in the prior art, and provides a vertebral body prosthesis capable of being implanted into long-segment bones, which is used for replacing a damaged vertebral body of a spine, and has good postoperative bone ingrowth characteristics so as to realize long-term osseous fusion.
The aim of the invention is achieved by the following technical scheme.
The utility model provides a can implant centrum prosthesis of long section bone, includes the centrum main part that has the bone grafting groove, the bone grafting groove is equipped with the opening that supplies the bone strip to put into, detachably installs bone grafting groove cover plate on the opening, centrum main part connection is equipped with the marrow chamber protection shield, the marrow chamber protection shield is fixed with human physiology centrum through posterior nail stick fixing system.
Further, the cross section of the centrum main body is U-shaped, the upper end and the lower end of the centrum main body also respectively comprise an upper end plate and a lower end plate, and the centrum main body is of a three-dimensional communicated porous structure.
Further, the bone grafting groove cover plate is of a smooth or three-dimensional communicated porous structure.
Further, the intramedullary canal protection plate is a unitary or multi-segment intramedullary canal protection plate.
Further, the intramedullary canal protection plate is disposed on one or both sides of the vertebral body.
Further, the inner surface of the marrow cavity protecting plate is a smooth surface, and the outer surface of the marrow cavity protecting plate is a three-dimensional communicated porous structure.
Further, the intramedullary cavity protecting plate is provided with an internal and external communication hole which enables soft tissues at the inner side and the outer side of the intramedullary cavity protecting plate to establish blood circulation and tissue connection.
Further, the intramedullary canal protection plate is provided with an open notch at the position corresponding to the original intervertebral hole on the physiological vertebral body of the human body.
Further, the posterior nail rod fixing system comprises longitudinal connecting rods arranged on two sides of the spinous process of the physiological vertebral body of the human body, the longitudinal connecting rods are fixed on the marrow cavity protecting plate through a fixing rod locking mechanism, and the physiological vertebral body of the human body and the longitudinal connecting rods are fixed through pedicle screws.
Further, the vertebral body main body is provided with a connecting part, and the posterior nail rod fixing system comprises transverse connecting nails for connecting the connecting part and each longitudinal connecting rod.
The beneficial effects of the invention are as follows:
1. the vertebral body prosthesis capable of being implanted with the bone strips is specially designed for patients needing to replace the vertebral bodies of longer vertebrae, the autologous fibula strips are used for filling the inside of the vertebral body main body to occupy the space, and bone fusion within the whole length range of the vertebral body main body can be achieved in a short time after operation so as to be beneficial to long-term stability of the implant;
2. the main body of the vertebral body prosthesis capable of being implanted with the bone strip is of a porous metal structure, and all pores of the main body are communicated with each other; the pore diameter of the pore of the porous metal structure is set to be 150-1000 mu m, and the mutually communicated pores can promote the establishment of micro-blood vessels and the ingrowth and fusion of bone cells;
3. the bone grafting groove on the main body of the vertebral prosthesis capable of being implanted with the bone strip is arranged in front of, behind or beside the vertebral prosthesis according to the requirement, and can be mixed and designed at different parts of the front, the back and the side so as to facilitate the implementation of the operation;
4. the edge or the inside of the bone grafting groove covering plate is provided with a reinforcing frame and reinforcing ribs, so that the strength of the bone grafting groove covering plate can be ensured;
5. the backward surface of the bone grafting groove covering plate is designed to be a smooth surface so as to avoid friction damage to spinal dura mater;
6. the internal and external communication holes are arranged on the marrow cavity protecting plate, so that soft tissues at the inner side and the outer side of the marrow cavity protecting plate can establish blood circulation and form tissue connection to generate the function of mutual suspension;
7. the vertebral body prosthesis capable of being implanted with the bone strip, the vertebral body prosthesis main body, the bone grafting groove cover plate and the marrow cavity protective plate are manufactured by adopting a metal 3D printing technology, the manufacturing process is simple and quick, the design and the manufacturing can be completed within 24 hours generally, and the vertebral body prosthesis is beneficial to timely operation and early fixation of patients.
Drawings
FIG. 1 is a schematic view of the structure of a vertebral body;
FIG. 2 is a schematic structural view of a three-dimensional connected porous structure intramedullary canal protection plate;
FIG. 3 is a schematic view of the structure of the reinforcing ribs of the intramedullary canal protection plate;
FIG. 4 is a schematic view of the construction of the unitary intramedullary canal protector;
FIG. 5 is a schematic view of a multi-stage intramedullary canal protection plate;
FIG. 6 is a schematic structural view of a rear spike rod fixing system;
FIG. 7 is a schematic illustration of the use of example 1;
FIG. 8 is a schematic view showing the use state of example 1;
FIG. 9 is a schematic view of an embodiment of a bone graft groove disposed laterally of a vertebral body prosthesis
In the figure:
1. an upper endplate; 2. a lower endplate; 3. a bone grafting groove; 4. reinforcing the frame; 5. the bone grafting groove covers the plate reinforcing rib; 6. a three-dimensional communicating porous structure; 7. an open recess; 8. an inner and outer communicating hole; 9. a multi-segment intramedullary canal protection plate; 10. a fixing rod locking mechanism; 11. a longitudinal connecting rod; 12. a vertebral body main body; 13. a intramedullary canal protection plate; 14. a physiological vertebral body of a human body; 15. pedicle screws; 16. bone strips; 17. a bone grafting groove cover plate; 18. a screw; 19. and opening the mouth.
Detailed Description
The technical scheme of the invention is further described by specific examples.
Example 1
1-8, a vertebral body prosthesis capable of being implanted into long bones comprises a vertebral body main body 12 with a bone grafting groove 3, wherein the bone grafting groove 3 is provided with an opening 19 for placing bone strips, the opening 19 is detachably covered with a bone grafting groove cover plate 17, the vertebral body main body 12 is connected with a medullary cavity protection plate 13, and the medullary cavity protection plate 13 is fixed with a human physiological vertebral body 14 through a posterior nail rod fixing system;
the bone grafting groove cover plate 17 is fixed on the vertebral body main body 12 through a screw 18;
the bone grafting groove 3 is arranged in front of, behind or beside the vertebral body main body 12 of the implantable bone strip 16, and the bone grafting groove 3 can be designed at different positions of the front side and the rear side in a mixing way according to the requirement; the implantable bone strip 16 may be taken from a patient's fibula, and the removed fibula section is contoured by a special tool by a medical practitioner during surgery to fit conveniently into the bone grafting slot 3 in the body of the implantable bone strip; bone fusion within the whole length range of the vertebral body main body is achieved in a short time after operation so as to facilitate long-term stabilization of the implant; optionally, implantation through the treated long length of allograft bone; the whole long bone is directly implanted to replace the conventional bone powder implantation, so that the problems of insufficient autologous bone particles and expensive allogenic bone particles are solved.
The upper end and the lower end of the vertebral body main body 12 also respectively comprise an upper endplate 1 and a lower endplate 2, and the vertebral body main body 12 is a three-dimensional communicated porous structure 6; because the whole bone strip is directly implanted, the upper end plate 1 and the lower end plate 2 can keep the largest area, meanwhile, the upper end plate 1, the lower end plate 2 and the bone strip 16 can play a supporting role, and the upper end plate 1 and the lower end plate 2 are of three-dimensional communicated porous structures 6 and are more beneficial to bone ingrowth while playing a supporting role, so that more stable support is formed, the implanted vertebral prosthesis can be firm, the subsidence phenomenon is avoided, and the good ideal height is kept.
The bone grafting groove cover plate 17 is a smooth or three-dimensional communicated porous structure 6, the purpose of the bone grafting groove cover plate 17 is to fixedly limit the bone strip 16 in the bone grafting groove 3 to prevent the bone grafting groove from shifting or falling out, and the reinforcing frame 4 and the bone grafting groove cover plate reinforcing ribs 5 are arranged on the bone grafting groove cover plate 17 to strengthen the strength of the bone grafting groove cover plate 17;
the pore diameter of the three-dimensional communicated porous structure 6 is designed to be 150-1000 mu m so as to be beneficial to the growth of bone cells;
when the bone grafting groove 3 is arranged at the rear of the vertebral body main body 12, if the operation only removes the bone parts of the affected part vertebral body and keeps the posterior longitudinal ligament, the three-dimensional communication porous structure 6 on the bone grafting groove cover plate 17 can reserve a space and a channel for the ingrowth of the posterior longitudinal ligament cells;
when the bone grafting groove 3 is provided at the rear of the vertebral body main body 12, if the bone parts of the affected part vertebral body and the posterior longitudinal ligament are all removed by the operation, the surface of the bone grafting groove cover plate 17 facing the rear is designed to be a smooth surface so as to avoid friction damage to the spinal dura mater;
as shown in fig. 9, the bone grafting groove 3 on the main body of the vertebral prosthesis with the implantable bone strip according to the invention is arranged in front of, behind or beside the vertebral prosthesis according to the requirement, and the bone grafting groove 3 can be designed at different parts of front, back and side in a mixed way so as to facilitate the implementation of the operation.
The medullary cavity protecting plate 13 is provided at one side or both sides of the vertebral body main body 12; the medullary cavity protecting plate 13 encloses spinal nerves which lose the protection of the vertebral bodies to avoid contact and invasion of external tissues;
the marrow cavity protecting board 13 is an integral or multi-segment marrow cavity protecting board 9;
the inner surface of the marrow cavity protecting plate 13 is a smooth surface, and the outer surface of the marrow cavity protecting plate 13 is a three-dimensional communicated porous structure 6; the inner surface of the marrow cavity protecting plate 16 is a polished smooth surface to avoid friction damage to spinal cord dura mater, and the outer surface of the marrow cavity protecting plate 16 is provided with a three-dimensional communicated porous structure 6 to facilitate the attachment and the ingrowth of surrounding soft tissue cells so as to increase the stability of the marrow cavity protecting plate 13;
the intramedullary cavity protecting plate 13 is provided with an internal and external communication hole 8, so that soft tissues at the inner side and the outer side of the intramedullary cavity protecting plate 13 can establish blood circulation and tissue connection to generate the function of mutual suspension;
the intramedullary canal protection plate 13 is provided with an open notch 7 corresponding to the intervertebral hole position on the original human physiological vertebral body 14, and the open notch 7 opens nerve roots.
The posterior nail rod fixing system comprises longitudinal connecting rods 11 arranged on two sides of the spinous process of a physiological vertebral body 14 of a human body, the longitudinal connecting rods 11 are fixed on a marrow cavity protecting plate 13 through a fixing rod locking mechanism 10, and the artificial vertebral body 14 and the longitudinal connecting rods 11 are further fixed through pedicle screws 15.
The invention relates to a vertebral prosthesis capable of being implanted with bone strips, which comprises the following manufacturing processes:
1. firstly, establishing a three-dimensional model of a patient disease part in a computer according to medical three-dimensional tomographic data such as CT or MRI of the patient and using an interactive medical image control system;
2. designing the overall form of the bone strip implantable vertebral body prosthesis and the specific form of each part by referring to the three-dimensional model and the operation scheme;
3. designing a pore diameter three-dimensional model of a required porous metal structure;
4. designing a reinforcing structure required by each part;
5. inputting the completed design file into metal 3D printing equipment for direct printing and forming, wherein the used metal materials are various materials which can be implanted into human bodies, such as cobalt alloy, titanium alloy, medical stainless steel and the like;
6. after printing, proper subsequent finishing, cleaning and sterilizing processing can be performed for operation.
The foregoing describes one embodiment of the present invention in detail, but the description is only a preferred embodiment of the present invention and should not be construed as limiting the scope of the invention. All equivalent changes and modifications within the scope of the present invention are intended to be covered by the present invention.
Claims (9)
1. A vertebral body prosthesis capable of being implanted into a long bone segment, characterized in that: the bone grafting groove comprises a vertebral body main body with a bone grafting groove, wherein the bone grafting groove is provided with an opening for placing bone strips, a bone grafting groove covering plate is detachably arranged on the opening, the vertebral body main body is connected with a marrow cavity protecting plate, and the marrow cavity protecting plate is fixed with a physiological vertebral body of a human body through a rear road nail rod fixing system.
2. The vertebral prosthesis of claim 1 capable of being implanted in long bone segments, wherein: the cross section of the vertebral body main body is U-shaped, the upper end and the lower end of the vertebral body main body also respectively comprise an upper end plate and a lower end plate, and the vertebral body main body is of a three-dimensional communicated porous structure.
3. The vertebral prosthesis of claim 1 capable of being implanted in long bone segments, wherein: the bone grafting groove cover plate is of a smooth or three-dimensional communicated porous structure.
4. The vertebral prosthesis of claim 2 capable of being implanted in long bone segments, wherein: the marrow cavity protecting board is an integral or multi-section marrow cavity protecting board.
5. The vertebral prosthesis of claim 4 wherein the prosthesis is capable of being implanted in a long bone segment, wherein: the intramedullary canal protection plate is arranged on one side or two sides of the vertebral body main body.
6. The vertebral prosthesis of claim 5, wherein the prosthesis is capable of being implanted in a long bone segment, wherein: the inner surface of the marrow cavity protecting plate is a smooth surface, and the outer surface of the marrow cavity protecting plate is a three-dimensional communicated porous structure.
7. The vertebral prosthesis of claim 6, wherein the prosthesis is capable of being implanted in a long bone segment: the intramedullary cavity protecting plate is provided with an internal and external communication hole which enables soft tissues at the inner side and the outer side of the intramedullary cavity protecting plate to establish blood circulation and tissue connection.
8. The vertebral prosthesis of claim 7, wherein the prosthesis is capable of being implanted in a long bone segment: the intramedullary cavity protection plate is provided with an open notch at the position corresponding to the original intervertebral hole on the physiological vertebral body of the human body.
9. The vertebral prosthesis of claim 1 capable of being implanted in long bone segments, wherein: the posterior nail rod fixing system comprises longitudinal connecting rods arranged on two sides of the spinous process of the physiological vertebral body of the human body, the longitudinal connecting rods are fixed on the marrow cavity protecting plate through a fixing rod locking mechanism, and the physiological vertebral body of the human body and the longitudinal connecting rods are fixed through pedicle screws.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710710723.4A CN107569309B (en) | 2017-08-18 | 2017-08-18 | Vertebral prosthesis capable of being implanted into long bone |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710710723.4A CN107569309B (en) | 2017-08-18 | 2017-08-18 | Vertebral prosthesis capable of being implanted into long bone |
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| CN107569309A CN107569309A (en) | 2018-01-12 |
| CN107569309B true CN107569309B (en) | 2023-08-22 |
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| CN201710710723.4A Active CN107569309B (en) | 2017-08-18 | 2017-08-18 | Vertebral prosthesis capable of being implanted into long bone |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108578020A (en) * | 2018-05-18 | 2018-09-28 | 李建民 | 3D printing artificial vertebral body inner fixing device |
| CN113081405B (en) * | 2021-04-08 | 2023-11-03 | 新疆大学 | Artificial vertebral body and manufacturing method thereof |
| CN114129308A (en) * | 2021-11-15 | 2022-03-04 | 中国人民解放军空军军医大学 | 3D prints fixed integration back way neck pillow and fuses false body |
| CN116602796B (en) * | 2023-04-03 | 2024-02-23 | 无锡市第九人民医院 | Deformable extracted marrow cavity occupying device for accurate bone grafting |
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| CN1053004A (en) * | 1991-01-18 | 1991-07-17 | 王芬 | The adjustable artificial vertebral body of L type |
| EP0968692A1 (en) * | 1998-06-29 | 2000-01-05 | Christos Kalaitzis | Plate-cylinder vertebral prosthesis system |
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| CN104207864A (en) * | 2013-05-29 | 2014-12-17 | 天津市威曼生物材料有限公司 | Dynamic stable mesh cage |
| CN208958415U (en) * | 2017-08-18 | 2019-06-11 | 北京爱康宜诚医疗器材有限公司 | A kind of centrum prosthese that can be implanted into long section bone |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040122424A1 (en) * | 2000-01-15 | 2004-06-24 | Ferree Bret A. | Enhanced surface area spinal fusion devices and alignment apparatus therefor |
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2017
- 2017-08-18 CN CN201710710723.4A patent/CN107569309B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1053004A (en) * | 1991-01-18 | 1991-07-17 | 王芬 | The adjustable artificial vertebral body of L type |
| EP0968692A1 (en) * | 1998-06-29 | 2000-01-05 | Christos Kalaitzis | Plate-cylinder vertebral prosthesis system |
| CN101610739A (en) * | 2006-11-29 | 2009-12-23 | 外科技术有限公司 | Orthopaedic implants and prosthese |
| CN201040010Y (en) * | 2007-06-06 | 2008-03-26 | 中国人民解放军第二军医大学 | Full contact type vertebral column titanium netted bone grafting fusion device |
| CN103239305A (en) * | 2012-02-10 | 2013-08-14 | 北京爱康宜诚医疗器材股份有限公司 | Self-stabilization artificial vertebral body |
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