CN115670758B - Adjustable artificial vertebral body - Google Patents
Adjustable artificial vertebral body Download PDFInfo
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- CN115670758B CN115670758B CN202211695368.5A CN202211695368A CN115670758B CN 115670758 B CN115670758 B CN 115670758B CN 202211695368 A CN202211695368 A CN 202211695368A CN 115670758 B CN115670758 B CN 115670758B
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Abstract
The invention provides an adjustable artificial vertebral body, which comprises: a vertebral body having a mounting bore extending along an axis thereof; the end cover is covered at the upper end of the vertebral body; the height adjusting piece penetrates through the mounting hole in a liftable manner, the upper end of the height adjusting piece is positioned outside the mounting hole, a spherical matching structure is arranged between the upper end face of the height adjusting piece and the lower surface of the end cover, and the end cover can rotate relative to the height adjusting piece through the spherical matching structure; the first locking structure is arranged between the end cover and the height adjusting piece so as to limit the rotation of the end cover relative to the height adjusting piece; and the second locking structure is arranged between the vertebral body and the height adjusting piece so as to limit the lifting of the height adjusting piece relative to the vertebral body. Through the technical scheme provided by the application, the problem that the size of the artificial vertebral body in the related technology cannot be flexibly adjusted can be solved.
Description
Technical Field
The invention relates to the technical field of artificial vertebral bodies, in particular to an adjustable artificial vertebral body.
Background
Tumor of vertebral body, severe comminuted fracture and some infectious diseases (such as tuberculosis, etc.) often cause damage to vertebral body, lead to nerve dysfunction such as spinal cord or nerve perioperative injury, or lead to collapse of vertebral body and angulation deformity of vertebral column, excise the severely damaged vertebral body through vertebrectomy, and implant artificial vertebral body to replace the excised vertebral body.
In the related technology, the artificial vertebral body can be roughly divided into a bone cement filling type, a titanium net supporting type and a supporting and fixing type, the artificial vertebral bodies of different types are designed differently, the biomechanical stability of the artificial vertebral bodies of different types is different, the titanium net supporting type artificial vertebral body has the widest application range, the cylindrical artificial vertebral body made of the titanium net is placed at the position of the excised vertebral body to support two vertebral bodies adjacent to the excised vertebral body, and the two vertebral bodies adjacent to the excised vertebral body are fixed on a steel plate by using screws.
However, due to the particularity of human anatomy, the size of the artificial vertebral body varies from person to person, and the size of the titanium mesh-supported artificial vertebral body in the related art cannot be adjusted, so that the titanium mesh needs to be temporarily cut in the operation process, or the artificial vertebral bodies with various sizes need to be prepared, so that the operation is complicated or the stock quantity of the artificial vertebral bodies is large.
Disclosure of Invention
The invention provides an adjustable artificial vertebral body, which aims to solve the problem that the size of the artificial vertebral body in the related art cannot be flexibly adjusted.
The invention provides an adjustable artificial vertebral body, which comprises: a vertebral body having a mounting bore extending along an axis thereof; the end cover is covered at the upper end of the vertebral body; the height adjusting piece is arranged in the mounting hole in a penetrating mode in a liftable mode, the upper end of the height adjusting piece is located on the outer side of the mounting hole, a spherical matching structure is arranged between the upper end face of the height adjusting piece and the lower surface of the end cover, and the end cover can rotate relative to the height adjusting piece through the spherical matching structure; the first locking structure is arranged between the end cover and the height adjusting piece so as to limit the rotation of the end cover relative to the height adjusting piece; and the second locking structure is arranged between the vertebral body and the height adjusting piece so as to limit the lifting of the height adjusting piece relative to the vertebral body.
Furthermore, the spherical matching structure comprises a first arc-shaped surface and a second arc-shaped surface matched with the first arc-shaped surface, the first arc-shaped surface is arranged on the upper end surface of the height adjusting piece, and the second arc-shaped surface is arranged on the lower surface of the end cover; wherein, one of them of first arcwall face and second arcwall face is provided with stair structure, and stair structure includes a plurality of steps, and a plurality of steps are arranged in proper order along the axial of centrum main part, and the annular structure of step for extending along the circumference of centrum main part, the radius of a plurality of steps reduces from bottom to top in proper order.
Further, the height adjusting member includes: the height adjusting column is arranged in the mounting hole in a penetrating mode in a liftable mode and is in rotation stopping fit with the mounting hole, the upper end of the height adjusting column is located on the outer side of the mounting hole, and the spherical matching structure is arranged between the upper end face of the height adjusting column and the lower surface of the end cover; the limiting ring is sleeved on the height adjusting column and in threaded fit with the height adjusting column, the limiting ring is rotatably arranged on the vertebral body main body around the axis of the limiting ring, the limiting ring is in limited fit with the vertebral body main body in the axial direction of the vertebral body main body, and the second locking structure is arranged between the vertebral body main body and the limiting ring.
Furthermore, the outer side wall of the height adjusting column is provided with spiral outer teeth, the inner side wall of the limiting ring is provided with spiral inner teeth, and the cross section shape of the spiral outer teeth and the cross section shape of the spiral inner teeth are both of a trapezoidal structure; and/or the cross section of the mounting hole is oblate, the cross section of the height adjusting column is oblate, and the outer side wall of the height adjusting column is in rotation stopping fit with the hole wall of the mounting hole.
Furthermore, the hole wall of the mounting hole is provided with a mounting groove extending along the circumferential direction of the mounting hole, the mounting groove penetrates through part of the outer side wall of the vertebral body, and the limiting ring is assembled in the mounting groove.
Further, the lower terminal surface of spacing ring is provided with a plurality of support archs of arranging along its circumference interval, supports bellied lower extreme and the lower extreme wall butt of mounting groove.
Further, be provided with on height-adjusting spare's the lateral wall along its axial extension's bar groove, be provided with a plurality of teeth on the lateral wall in bar groove, a plurality of teeth set up along the extending direction interval in bar groove, and the centrum main part has the hole of dodging that corresponds the setting of bar groove.
Further, the first locking structure includes: the first fastener penetrates through the end cover and is in threaded connection with the end cover; the recess sets up on height-adjusting spare's lateral wall, and the one end of first fastener stretches into in the recess and with the diapire looks butt of recess.
Furthermore, the bottom wall of the groove is a hemispherical surface, the center of the hemispherical surface protrudes in the direction far away from the bottom wall of the groove, one end, close to the height adjusting piece, of the first fastening piece is provided with a conical boss, and the side wall of the conical boss is an inwards concave cambered surface matched with the hemispherical surface; and/or, the end cover includes the end plate and sets up the joint protrusion in the border department of end plate, and joint protrusion downwardly extending is provided with along its circumference extension dodge the breach, and joint protrusion can stretch into dodge in the breach, and on the extending direction who dodges the breach, joint protrusion's size is less than the size of dodging the breach.
Furthermore, the second locking structure comprises a second fastener, the second fastener penetrates through the vertebral body and is in threaded connection with the vertebral body, and the second fastener is abutted against the outer side wall of the height adjusting piece; and/or the height adjusting piece has a moving stroke of 0mm to 50mm relative to the vertebral body along the axial direction of the mounting hole.
Further, the range of the swing angle of the end cover relative to the height adjusting piece in the horizontal direction is-20 degrees to 20 degrees; and/or the rotation angle of the end cover around the axis of the height adjusting piece relative to the height adjusting piece ranges from-10 degrees to 10 degrees.
Furthermore, the adjustable artificial vertebral body also comprises a first end plate and a second end plate, wherein the first end plate is connected with the lower end of the vertebral body, and the second end plate is connected with the upper end of the end cover.
Furthermore, a plurality of first conical bosses are arranged on the upper surface of the first end plate at intervals along the circumferential direction of the vertebral body, a plurality of first conical grooves which correspond to the first conical bosses one by one are arranged at the lower end of the vertebral body, the first conical bosses are inserted into the first conical grooves, a plurality of second conical bosses are arranged on the lower surface of the second end plate at intervals along the circumferential direction of the vertebral body, a plurality of second conical grooves which correspond to the second conical bosses one by one are arranged at the upper end of the end cover, and the second conical bosses are inserted into the second conical grooves; and/or the upper end face of the first end plate is provided with a first porous structure, and the lower end face of the second end plate is provided with a second porous structure.
By applying the technical scheme, the adjustable artificial vertebral body comprises a vertebral body main body, an end cover, a height adjusting piece, a first locking structure and a second locking structure, wherein the height adjusting piece is arranged in an installation hole of the vertebral body main body in a penetrating manner, the end cover is arranged at the upper end of the vertebral body main body in a covering manner, and when the height of the adjustable artificial vertebral body is adjusted, the end cover is driven to be far away from and close to the vertebral body main body along the axis direction of the vertebral body main body through the lifting movement of the height adjusting piece in the installation hole, so that the overall height of the artificial vertebral body can be adjusted. When adjusting the angle of adjustable artifical centrum, utilize sphere cooperation structure for the relative high regulating part of end cover rotates, change the contained angle between the upper surface of end cover and the lower terminal surface of centrum main part, thereby change the contained angle between the up end of adjustable artifical centrum and the lower terminal surface of adjustable artifical centrum, the angle of the adjustable artifical centrum of electrodeless regulation, when the angle of adjustable artifical centrum satisfies the use needs, through the rotation of the relative high regulating part of first locking structure restriction end cover, make the angle of adjustable artifical centrum fixed. Therefore, the height of the artificial vertebral body can be adjusted by lifting the height adjusting piece in the mounting hole, and the angle of the artificial vertebral body can be adjusted in a stepless manner by utilizing the spherical matching structure, so that the height and the angle of the artificial vertebral body can be adjusted according to actual needs, different anatomical data and human body structures in the operation can be met, the operation efficiency is improved, and the stock quantity before the operation is reduced.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 illustrates an exploded view of an adjustable artificial vertebral body provided in accordance with an embodiment of the present invention;
FIG. 2 illustrates a schematic structural view of an adjustable artificial vertebral body provided according to an embodiment of the invention;
FIG. 3 illustrates a cross-sectional view of an adjustable artificial vertebral body provided in accordance with an embodiment of the present invention;
FIG. 4 is a schematic structural view of a height adjustment post for an adjustable artificial vertebral body according to an embodiment of the present invention;
FIG. 5 illustrates a schematic structural view of an end cap of an adjustable artificial vertebral body provided according to an embodiment of the invention;
FIG. 6 illustrates a schematic structural view of a vertebral body of an adjustable artificial vertebral body provided in accordance with an embodiment of the present invention;
FIG. 7 is a structural schematic diagram illustrating another perspective of a vertebral body of an adjustable artificial vertebral body provided in accordance with an embodiment of the present invention;
FIG. 8 is a schematic structural view of a stop collar for an adjustable artificial vertebral body according to an embodiment of the invention;
FIG. 9 is a structural schematic diagram illustrating another view of a stop collar of an adjustable artificial vertebral body according to an embodiment of the invention;
FIG. 10 illustrates a schematic structural view of a first fastener of an adjustable artificial vertebral body provided in accordance with an embodiment of the present invention;
FIG. 11 illustrates a structural view from another perspective of a first fastener for an adjustable artificial vertebral body provided in accordance with an embodiment of the present invention;
FIG. 12 illustrates a schematic structural view of a second fastener for an adjustable artificial vertebral body provided in accordance with an embodiment of the present invention;
FIG. 13 is a structural schematic diagram illustrating another perspective of a second fastener for an adjustable artificial vertebral body according to an embodiment of the present invention;
FIG. 14 is a structural schematic diagram illustrating another perspective of an end cap of an adjustable artificial vertebral body provided in accordance with an embodiment of the present invention;
FIG. 15 illustrates a top view of a second endplate of an adjustable artificial vertebral body provided in accordance with an embodiment of the invention;
FIG. 16 illustrates a top view of a second endplate of an adjustable artificial vertebral body provided in accordance with a second embodiment of the invention;
FIG. 17 illustrates a top view of a second endplate of an adjustable artificial vertebral body according to a third embodiment of the invention;
FIG. 18 illustrates a top view of a second endplate of an adjustable artificial vertebral body according to a fourth embodiment of the invention;
FIG. 19 illustrates a schematic view of a second endplate of an adjustable artificial vertebral body according to an embodiment of the invention.
Wherein the figures include the following reference numerals:
10. a vertebral body; 11. mounting holes; 111. mounting grooves; 12. avoiding holes; 13. avoiding the notch; 14. a first conical boss; 16. lightening holes;
20. an end cap; 21. an end plate; 22. a connecting projection; 23. a second conical boss;
30. a height adjustment member; 31. a height adjustment post; 311. helical external teeth; 32. a limiting ring; 321. a helical internal tooth; 322. a support boss; 33. a strip-shaped groove; 331. teeth;
40. a spherical surface matching structure; 41. a first arc-shaped surface; 42. a second arc-shaped surface; 43. a stepped structure; 431. a step;
50. a first locking structure; 51. a first fastener; 511. a conical boss; 5111. an inward concave arc surface; 52. a groove; 521. a hemispherical surface;
60. a second locking structure; 61. a second fastener;
70. a first endplate; 71. a first conical recess;
80. a second endplate; 81. a second porous structure;
90. bone grafting holes;
gamma, the angle between the upper surface of the tooth and the lower surface of the tooth.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be obtained by a person skilled in the art without inventive step based on the embodiments of the present invention, are within the scope of protection of the present invention.
As shown in fig. 1 to 19, an embodiment of the present invention provides an adjustable artificial vertebral body, which includes a vertebral body 10, an end cap 20, a height adjusting member 30, a first locking structure 50 and a second locking structure 60, wherein the vertebral body 10 has a mounting hole 11 extending along an axis thereof, the end cap 20 covers an upper end of the vertebral body 10, the height adjusting member 30 is liftably inserted into the mounting hole 11, an upper end of the height adjusting member 30 is located outside the mounting hole 11, a spherical surface fitting structure 40 is disposed between an upper end surface of the height adjusting member 30 and a lower surface of the end cap 20, the end cap 20 is rotatable relative to the height adjusting member 30 via the spherical surface fitting structure 40, the first locking structure 50 is disposed between the end cap 20 and the height adjusting member 30 to limit rotation of the end cap 20 relative to the height adjusting member 30, and the second locking structure 60 is disposed between the vertebral body 10 and the height adjusting member 30 to limit lifting and lowering of the height adjusting member 30 relative to the vertebral body 10.
Use the adjustable artificial vertebral body that this embodiment provided, this adjustable artificial vertebral body includes centrum main part 10, end cover 20, height adjusting part 30, first locking structure 50 and second locking structure 60, wear to locate in the mounting hole 11 of centrum main part 10 height adjusting part 30, establish the upper end at centrum main part 10 with end cover 20 lid, when adjusting the height of adjustable artificial vertebral body, through the lift removal of height adjusting part 30 in mounting hole 11, drive end cover 20 and keep away from and be close to centrum main part 10 along the axis direction of centrum main part 10, thereby the overall height of electrodeless regulation adjustable artificial vertebral body, when the overall height of adjustable artificial vertebral body satisfies the needs of use, through the lift of second locking structure 60 restriction height adjusting part 30 relative centrum main part 10, make the height-fixing of adjustable artificial vertebral body. When the angle of the adjustable artificial vertebral body is adjusted, the spherical surface matching structure 40 is utilized, the end cover 20 relative height adjusting piece 30 is enabled to rotate, the included angle between the upper surface of the end cover 20 and the lower end surface of the vertebral body main body 10 is changed, the included angle between the upper end surface of the adjustable artificial vertebral body and the lower end surface of the adjustable artificial vertebral body is changed, the angle of the adjustable artificial vertebral body is adjusted in an electrodeless mode, when the angle of the adjustable artificial vertebral body meets the use requirement, the rotation of the end cover 20 relative height adjusting piece 30 is limited through the first locking structure 50, and the angle of the adjustable artificial vertebral body is enabled to be fixed. Therefore, the height of the adjustable artificial vertebral body can be adjusted steplessly by the lifting of the height adjusting piece 30 in the mounting hole 11, and the angle of the adjustable artificial vertebral body can be adjusted steplessly by the spherical matching structure 40, so that the height and the angle of the adjustable artificial vertebral body can be adjusted according to actual needs, different anatomical data and human body structures of an operation can be met, the operation efficiency is improved, and the stock quantity before the operation is reduced.
It should be noted that, the angle adjustment of the adjustable artificial vertebral body can be adjusted and fixed in advance by the vertebral body structure in the X-ray film before the operation, and then the adjustable artificial vertebral body is implanted into the human body to adjust the height of the adjustable artificial vertebral body, or the adjustable artificial vertebral body is implanted into the human body, after the height of the adjustable artificial vertebral body is adjusted to a proper height, the height adjusting piece 30 continuously rises in the mounting hole 11, and under the action of two vertebral bodies adjacent to the implantation position of the adjustable artificial vertebral body, the height adjusting piece 30 drives the end cap 20 to rotate through the spherical surface matching structure 40, so as to realize the self-adaptive adjustment of the angle of the adjustable artificial vertebral body.
In the present embodiment, the up-down direction refers to the up-down direction in the assembly case of fig. 7, and if the actual assembly case is changed, the up-down direction may adaptively refer to other directions.
As shown in fig. 3 and 4, the spherical surface matching structure 40 includes a first arc surface 41 and a second arc surface 42 matched with the first arc surface 41, the first arc surface 41 is disposed on the upper end surface of the height adjusting member 30, the second arc surface 42 is disposed on the lower surface of the end cover 20, wherein one of the first arc surface 41 and the second arc surface 42 is provided with a step structure 43, the step structure 43 includes a plurality of steps 431, the plurality of steps 431 are sequentially arranged along the axial direction of the vertebral body 10, the steps 431 are annular structures extending along the circumferential direction of the vertebral body 10, and the radii of the plurality of steps 431 are sequentially reduced from bottom to top. When limiting the rotation of end cover 20 relative height adjusting part 30 through first locking structure 50, adopt foretell stair structure 43, improve the coefficient of static friction between first arcwall face 41 and the second arcwall face 42, increase the static frictional force between first arcwall face 41 and the second arcwall face 42, improve first locking structure 50 to the pivoted limiting action of end cover 20 relative height adjusting part 30, improve first locking structure 50's locking ability, avoid adjustable artificial vertebral body to take place the angle change in the use, improve the stability in use of adjustable artificial vertebral body.
As shown in fig. 1, the height adjusting member 30 includes a height adjusting column 31 and a limiting ring 32, the height adjusting column 31 is disposed through the mounting hole 11 in a liftable manner and is in rotation-stop fit with the mounting hole 11, the upper end of the height adjusting column 31 is located outside the mounting hole 11, the spherical fitting structure 40 is disposed between the upper end surface of the height adjusting column 31 and the lower surface of the end cap 20, the limiting ring 32 is sleeved on the height adjusting column 31 and is in threaded fit with the height adjusting column 31, the limiting ring 32 is rotatably disposed on the vertebral body 10 around the axis thereof, the limiting ring 32 is in limiting fit with the vertebral body 10 in the axial direction of the vertebral body 10, and the second locking structure 60 is disposed between the vertebral body 10 and the limiting ring 32. When the whole height of adjustable artifical centrum satisfies the use needs, through the rotation of second locking structure restriction spacing ring 32 relative centrum main part 10, because spacing ring 32 and centrum main part 10 spacing cooperation on the axial direction of centrum main part 10, height adjusting part 30 and mounting hole 11 spline the cooperation for spacing ring 32 passes through the lift removal of screw-thread fit restriction altitude mixture control post 31 in mounting hole 11, thereby the altitude mixture control of the adjustable artifical centrum of restriction.
As shown in fig. 3 and 8, the outer side wall of the height adjusting column 31 is provided with a helical outer tooth 311, the inner side wall of the retainer ring 32 is provided with a helical inner tooth 321, and the cross-sectional shape of the helical outer tooth 311 and the cross-sectional shape of the helical inner tooth 321 are both trapezoidal structures. Because the cross sectional shape of spiral external tooth 311 and the cross sectional shape of spiral internal tooth 321 are trapezium structure, improve the structural strength of spiral external tooth 311 and spiral internal tooth 321, when restricting the lift of height adjusting part 30 relative centrum main part 10 through second locking structure 60, avoid the meshing between spiral internal tooth 321 and the spiral external tooth 311 to become invalid, improve the locking ability of second locking structure 60, avoid adjustable artifical centrum to take place altitude variation in the use, improve the stability in use of adjustable artifical centrum.
In the present embodiment, the cross-sectional shape of the mounting hole 11 is an oblate, the cross-sectional shape of the height adjusting column 31 is an oblate, and the outer side wall of the height adjusting column 31 is in rotation-stopping fit with the hole wall of the mounting hole 11. When the rotation of the limiting ring 32 relative to the vertebral body main body 10 is limited through the second locking structure, the rotation stopping matching is adopted, the structural strength of the vertebral body main body 10 and the height adjusting column 31 is improved, the reliability of the rotation stopping matching between the height adjusting column 31 and the mounting hole 11 is improved, in the using process of the adjustable artificial vertebral body, the rotation of the height adjusting column 31 in the mounting hole 11 is avoided, and the using stability and the using reliability of the adjustable artificial vertebral body are improved.
As shown in FIGS. 6 and 7, the wall of the mounting hole 11 has a mounting groove 111 extending along the circumference thereof, the mounting groove 111 penetrates through a portion of the outer side wall of the vertebral body 10, and the stop collar 32 is fitted into the mounting groove 111. By adopting the mounting groove 111, the mounting difficulty of the limiting ring 32 is reduced and the assembly efficiency is improved in the assembly process of the adjustable artificial vertebral body.
As shown in fig. 8 and 9, the lower end surface of the retainer ring 32 is provided with a plurality of supporting protrusions 322 arranged at intervals along the circumferential direction thereof, and the lower ends of the supporting protrusions 322 are abutted against the lower end wall of the mounting groove 111. When the rotation of the relative height adjusting part 30 of end cover 20 is restricted through first locking structure 50, adopt foretell a plurality of supporting protrusions 322, the coefficient of static friction between the lower terminal surface of improvement spacing ring 32 and the lower terminal wall of mounting groove 111, increase the stiction between spacing ring 32 and the mounting groove 111, improve the first locking structure 50 to the pivoted limiting action of the relative height adjusting part 30 of end cover 20, improve the locking ability of first locking structure 50, avoid adjustable artificial vertebral body to take place angle variation in the use, improve the stability in use of adjustable artificial vertebral body.
The lower end wall of the mounting groove 111 means the lower inner wall of the mounting groove 111 in the orientation of fig. 7.
As shown in fig. 4, a strip-shaped groove 33 extending along an axial direction of the height adjusting member 30 is disposed on an outer sidewall of the height adjusting member 30, a plurality of teeth 331 are disposed on a sidewall of the strip-shaped groove 33, the plurality of teeth 331 are disposed at intervals along an extending direction of the strip-shaped groove 33, and the vertebral body 10 has an avoiding hole 12 disposed corresponding to the strip-shaped groove 33. The plurality of teeth 331 are shifted from the outside of the adjustable artificial vertebral body through the avoidance hole 12 to drive the height adjusting piece 30 to ascend and descend in the mounting hole 11, so that the operability of height adjustment of the adjustable artificial vertebral body is improved.
As shown in fig. 3, in the present embodiment, an angle γ between the upper surface of the tooth 331 and the lower surface of the tooth 331 is 45 °.
As shown in fig. 4, 10 and 11, the first locking structure 50 includes a first fastening member 51 and a groove 52, the first fastening member 51 is disposed through the end cap 20 and is in threaded connection with the end cap 20, the groove 52 is disposed on the outer side wall of the height adjusting member 30, and one end of the first fastening member 51 extends into the groove 52 and abuts against the bottom wall of the groove 52. By means of the threaded connection between the first fastening piece 51 and the end cover 20 and the abutting fit between the first fastening piece 51 and the bottom wall of the groove 52, the first locking structure 50 limits the rotation of the end cover 20 relative to the height adjusting piece 30, and the first fastening piece 51 is adopted, so that the operation difficulty is reduced, and the locking efficiency of the first locking structure 50 is improved.
As shown in fig. 4, the bottom wall of the groove 52 is a hemispherical surface 521, the center of the hemispherical surface 521 protrudes in a direction away from the bottom wall of the groove 52, one end of the first fastening member 51 close to the height adjusting member 30 is provided with a conical boss 511, and the side wall of the conical boss 511 is an inward concave arc 5111 matched with the hemispherical surface 521. By adopting the semi-spherical surface 521 and the concave cambered surface 5111 arranged on the conical boss 511, the concave cambered surface 5111 and the semi-spherical surface 521 can realize line contact at different positions of the end cover 20 rotating relative to the height adjusting piece 30, so that the first locking structure 50 can lock the end cover 20 and the height adjusting piece 30, and the use reliability of the first locking structure 50 is improved.
As shown in fig. 5, the end cap 20 includes an end plate 21 and a connecting protrusion 22 disposed at an edge of the end plate 21, the connecting protrusion 22 extends downward, an avoiding notch 13 extending along a circumferential direction of the upper end of the vertebral body 10 is disposed on the upper end of the vertebral body 10, the connecting protrusion 22 can extend into the avoiding notch 13, and a size of the connecting protrusion 22 is smaller than a size of the avoiding notch 13 in an extending direction of the avoiding notch 13. Under the prerequisite that the height of end cover 20 and the height of centrum main part 10 are certain, through stretching into the connecting protrusion 22 in dodging breach 13, when height adjusting part 30 descends to the lowest position, can further shorten the distance between the upper surface of end cover 20 and the lower terminal surface of centrum main part 10, when implanting adjustable artificial centrum into the human body, can further reduce the operation wound, reduce the damage to the human body, shorten postoperative recovery time.
As shown in fig. 12 and 13, the second locking structure 60 includes a second fastener 61, the second fastener 61 is disposed through the vertebral body 10 and is threadedly coupled to the vertebral body 10, and the second fastener 61 abuts against an outer sidewall of the height adjuster 30. By utilizing the threaded connection between the second fastening piece 61 and the vertebral body 10 and the abutting fit between the second fastening piece 61 and the height adjusting piece 30, the second locking structure 60 limits the lifting of the height adjusting piece 30 relative to the vertebral body 10, and the second fastening piece 61 is adopted, so that the operation difficulty is reduced, and the locking efficiency of the second locking structure 60 is improved.
In the present embodiment, the height adjusting member 30 has a moving stroke of 0mm to 50mm relative to the vertebral body 10 in the axial direction of the mounting hole 11. Therefore, on the basis of adjusting the minimum height of the artificial vertebral body, the height of the adjustable artificial vertebral body can be increased by 0mm to 50mm, and the adjustable artificial vertebral body adapts to different anatomical physiological data.
In the present embodiment, the swing angle of the end cap 20 in the horizontal direction with respect to the height adjuster 30 ranges from-20 ° to 20 °. The end cover 20 swings relative to the height adjusting piece 30 within the angle range, so that the angle of the adjustable artificial vertebral body can adapt to the curvature of the vertebral body of the human body.
It should be noted that the swing angle of the end cap 20 relative to the height adjusting member 30 in the horizontal direction refers to the rotation angle of the end cap 20 relative to the height adjusting member 30 around the center of the spherical surface fitting structure 40, as viewed in all directions perpendicular to the axis of the height adjusting member 30.
In this embodiment, the rotation angle of the end cap 20 about the axis of the height adjuster 30 relative to the height adjuster 30 ranges from-10 ° to 10 °. Through the rotation of the end cover 20 relative to the height adjusting piece 30 within the above-mentioned angle range, the rotation of the end cover 20 relative to the height adjusting piece 30 around the axis of the height adjusting piece 30 can be utilized during the operation, so that a flexible operation space and an operation angle can be provided for the operation.
It should be noted that the rotation angle of the end cap 20 relative to the height adjusting member 30 about the axis of the height adjusting member 30 means the rotation angle of the end cap 20 relative to the height adjusting member 30 about the center thereof as viewed in the axial direction of the height adjusting member 30.
As shown in FIG. 1, the adjustable artificial vertebral body further includes a first endplate 70 and a second endplate 80, the first endplate 70 being connected to the lower end of the vertebral body 10 and the second endplate 80 being connected to the upper end of the end cap 20. The first end plate 70 and the second end plate 80 are respectively arranged on two vertebral bodies adjacent to the implantation position of the vertebral body 10, and the upper end and the lower end of the vertebral body 10 are respectively connected with the first end plate 70 and the second end plate 80, so that implantation and fixation of the adjustable artificial vertebral body are realized.
As shown in fig. 1, 5 and 6, the upper surface of the first end plate 70 is provided with a plurality of first conical grooves 71, the plurality of first conical grooves 71 are arranged at intervals along the circumferential direction of the vertebral body 10, the lower end of the vertebral body 10 is provided with a plurality of first conical bosses 14 corresponding to the plurality of first conical grooves 71 one to one, the first conical bosses 14 are inserted into the first conical grooves 71, the lower surface of the second end plate 80 is provided with a plurality of second conical grooves, the plurality of second conical grooves are arranged at intervals along the circumferential direction of the vertebral body 10, the upper end of the end cover 20 is provided with a plurality of second conical bosses 23 corresponding to the plurality of second conical grooves one to one, and the second conical bosses 23 are inserted into the second conical grooves. When the first end plate 70 is connected with the vertebral body 10, the inner wall of the first conical groove 71 is used for guiding the first conical boss 14, so that the first end plate 70 is quickly aligned with the vertebral body 10, the installation efficiency is improved, when the second end plate 80 is connected with the end cover 20, the inner wall of the second conical groove is used for guiding the second conical boss 23, the second end plate 80 is quickly aligned with the vertebral body 10, and the installation efficiency is improved.
Moreover, the plurality of first conical bosses 14 are inserted into the plurality of first conical grooves 71 in a one-to-one corresponding manner, and the plurality of second conical bosses 23 are inserted into the plurality of second conical grooves in a one-to-one corresponding manner, so that the vertebral body 10 and the first end plate 70 are tightly matched at multiple angles, and the second end plate 80 and the end cover 20 are tightly matched at multiple angles, thereby adapting to the implantation requirements of operations in different directions.
As shown in FIG. 1, the upper end face of the first endplate 70 is provided with a first porous structure and the lower end face of the second endplate 80 is provided with a second porous structure 81. By adopting the first porous structure and the second porous structure 81, the bone ingrowth of the later-stage vertebral body is facilitated, the osseous fusion of the first end plate 70 and the second end plate 80 with the adjacent vertebral body is realized, the long-term stability of the adjustable artificial vertebral body is improved, and the postoperative collapse rate is reduced.
In this embodiment, the cross-section of the first endplate 70 includes a circular, oval, anatomic, or rounded rectangle and the cross-section of the second endplate 80 is a circular, oval, anatomic, or rounded rectangle. By adopting the first end plate 70 and the second end plate 80, the first end plate 70 and the second end plate 80 with different shapes are selected according to different anatomical forms and clinical application requirements of patients, so that the cutting amount of adjacent vertebral bodies can be reduced on the premise that the first end plate 70 and the second end plate 80 are highly matched and attached with the adjacent vertebral bodies, healthy vertebral bodies are kept as much as possible, and the injury to human bodies is reduced.
Specifically, the shape of the cross-section of the second endplate 80 has the following four embodiments: as shown in fig. 15, the second endplate 80 of the adjustable artificial vertebral body according to the first embodiment of the invention has a circular cross section, as shown in fig. 16, the second endplate 80 of the adjustable artificial vertebral body according to the second embodiment of the invention has an anatomical cross section, as shown in fig. 17, the second endplate 80 of the adjustable artificial vertebral body according to the third embodiment of the invention has an elliptical cross section, as shown in fig. 18, and the second endplate 80 of the adjustable artificial vertebral body according to the fourth embodiment of the invention has a rounded rectangular cross section.
As shown in FIG. 1, the end cap 20 and the height adjuster 30 have a bone graft hole 90 extending in the axial direction of the vertebral body 10. By adopting the bone grafting hole 90, bone grafting and subsequent bone grafting fusion in the operation are facilitated, and the long-term stability of the adjustable artificial vertebral body is improved.
It should be noted that bone graft openings 90 also extend through the first endplate 70 and the second endplate 80, as shown in fig. 15-19.
As shown in FIG. 6, a plurality of lightening holes 16 are provided through the side wall of the vertebral body 10. The plurality of lightening holes 16 are utilized to realize the adjustable lightening of the artificial vertebral body and ensure the smooth blood circulation.
In this embodiment, the adjustable artificial vertebral body is made of a medical metal including, but not limited to, titanium and titanium alloys, cobalt alloys, stainless steel, tantalum metal, and magnesium alloys.
The device provided by the embodiment has the following beneficial effects:
(1) In the height adjustment of the adjustable artificial vertebral body, the height adjusting piece 30 is used for lifting in the mounting hole 11, and the second locking structure 60 limits the lifting of the height adjusting piece 30 relative to the vertebral body 10, so that the adjustable artificial vertebral body with various height sizes is formed;
(2) In the angle adjustment of the adjustable artificial vertebral body, the spherical matching structure 40 and the first locking structure are utilized to form the adjustable artificial vertebral body with various angles so as to adapt to human body structures with different curvatures and realize better physiological anatomy attachment;
(3) At different positions of the end cover 20 rotating relative to the height adjusting piece 30, the concave cambered surface 5111 and the hemispherical surface 521 can realize line contact, so that the first locking structure 50 can lock the end cover 20 and the height adjusting piece 30, and the use reliability of the first locking structure 50 is improved;
(4) According to different anatomical forms and clinical application requirements of patients, the first end plate 70 and the second end plate 80 with different shapes are selected, so that the cutting amount of adjacent vertebral bodies can be reduced on the premise that the first end plate 70 and the second end plate 80 are in high matching fit with the adjacent vertebral bodies, healthy vertebral bodies are reserved as much as possible, and human body injury is reduced;
(5) The bone grafting hole 90 is adopted, so that bone grafting in operation and subsequent bone grafting fusion are facilitated, and the long-term stability of the adjustable artificial vertebral body is improved;
(6) The plurality of lightening holes 16 are utilized to realize the adjustable lightening of the artificial vertebral body and ensure the smooth blood circulation.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and in the case of not making a reverse description, these orientation words do not indicate and imply that the device or element being referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be considered as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.
For ease of description, spatially relative terms such as "over 8230," "upper surface," "above," and the like may be used herein to describe the spatial positional relationship of one device or feature to other devices or features as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary terms "at ...above" may include both orientations "at ...above 8230; 'at 8230;' below 8230;" above ". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of the present invention should not be construed as being limited.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (11)
1. An adjustable artificial vertebral body, comprising:
a vertebral body (10) having a mounting hole (11) extending along an axis thereof;
the end cover (20) is covered at the upper end of the vertebral body (10);
the height adjusting piece (30) comprises a height adjusting column (31) and a limiting ring (32), the height adjusting column (31) penetrates through the mounting hole (11) in a liftable mode and is in rotation stopping fit with the mounting hole (11), the upper end of the height adjusting column (31) is located on the outer side of the mounting hole (11), a spherical matching structure (40) is arranged between the upper end face of the height adjusting column (31) and the lower surface of the end cover (20), the end cover (20) can rotate relative to the height adjusting piece (30) through the spherical matching structure (40), the limiting ring (32) is sleeved on the height adjusting column (31) and is in threaded fit with the height adjusting column (31), the limiting ring (32) is rotatably arranged on the vertebral body (10) around the axis of the limiting ring, and the limiting ring (32) is in limiting fit with the vertebral body (10) in the axial direction of the vertebral body (10);
a first locking structure (50) disposed between the end cap (20) and the height adjustment member (30) to limit rotation of the end cap (20) relative to the height adjustment post (31);
the second locking structure (60) is arranged between the vertebral body (10) and the limiting ring (32) to limit the height adjusting column (31) to lift relative to the vertebral body (10);
wherein, be provided with on the lateral wall of height-adjusting post (31) along its axial extension's bar groove (33), be provided with a plurality of tooth (331) on the lateral wall of bar groove (33), it is a plurality of tooth (331) are followed the extending direction interval of bar groove (33) sets up, centrum main part (10) have the correspondence the hole of dodging (12) that bar groove (33) set up.
2. The adjustable artificial vertebral body according to claim 1, characterized in that the spherical mating structure (40) comprises a first arc-shaped face (41) and a second arc-shaped face (42) mating with the first arc-shaped face (41), the first arc-shaped face (41) being provided on the upper end face of the height adjusting piece (30), the second arc-shaped face (42) being provided on the lower surface of the end cap (20);
one of the first arc-shaped surface (41) and the second arc-shaped surface (42) is provided with a step structure (43), the step structure (43) comprises a plurality of steps (431), the steps (431) are sequentially arranged along the axial direction of the vertebral body (10), the steps (431) are annular structures extending along the circumferential direction of the vertebral body (10), and the radiuses of the steps (431) are sequentially reduced from bottom to top.
3. The adjustable artificial vertebral body of claim 1,
the outer side wall of the height adjusting column (31) is provided with spiral outer teeth (311), the inner side wall of the limiting ring (32) is provided with spiral inner teeth (321), and the cross section shape of the spiral outer teeth (311) and the cross section shape of the spiral inner teeth (321) are both of a trapezoidal structure; and/or the presence of a gas in the gas,
the cross section shape of mounting hole (11) is oblate, the cross section shape of altitude mixture control post (31) is oblate, the lateral wall of altitude mixture control post (31) with the pore wall of mounting hole (11) splines the cooperation.
4. The adjustable artificial vertebral body according to claim 1, wherein the wall of the installation hole (11) is provided with an installation groove (111) extending along the circumferential direction thereof, the installation groove (111) penetrates through part of the outer side wall of the vertebral body (10), and the limiting ring (32) is assembled in the installation groove (111).
5. The adjustable artificial vertebral body as claimed in claim 4, characterized in that the lower end face of the spacing ring (32) is provided with a plurality of supporting protrusions (322) arranged at intervals along the circumference thereof, and the lower ends of the supporting protrusions (322) are abutted against the lower end wall of the mounting groove (111).
6. Adjustable artificial vertebral body according to any one of claims 1 to 5, characterized in that the first locking structure (50) comprises:
the first fastener (51) penetrates through the end cover (20) and is in threaded connection with the end cover (20);
and the groove (52) is arranged on the outer side wall of the height adjusting piece (30), and one end of the first fastening piece (51) extends into the groove (52) and is abutted against the bottom wall of the groove (52).
7. The adjustable artificial vertebral body of claim 6,
the bottom wall of the groove (52) is a hemispherical surface (521), the center of the hemispherical surface (521) protrudes in the direction far away from the bottom wall of the groove (52), one end, close to the height adjusting piece (30), of the first fastener (51) is provided with a conical boss (511), and the side wall of the conical boss (511) is an inward concave arc surface (5111) matched with the hemispherical surface (521); and/or the presence of a gas in the atmosphere,
end cover (20) are in including end plate (21) and setting connecting protrusion (22) of the border department of end plate (21), connecting protrusion (22) downwardly extending, the upper end of centrum main part (10) is provided with dodges breach (13) of extending along its circumference, connecting protrusion (22) can stretch into dodge in breach (13) dodge on the extending direction of breach (13), connecting protrusion (22) the size be less than dodge the size of breach (13).
8. The adjustable artificial vertebral body of any one of claims 1 to 5,
the second locking structure (60) comprises a second fastening piece (61), the second fastening piece (61) penetrates through the vertebral body (10) and is in threaded connection with the vertebral body (10), and the second fastening piece (61) is abutted against the outer side wall of the height adjusting piece (30); and/or the presence of a gas in the gas,
the moving stroke of the height adjusting piece (30) relative to the vertebral body (10) along the axial direction of the mounting hole (11) is 0mm to 50mm.
9. The adjustable artificial vertebral body of any one of claims 1 to 5,
the range of the swing angle of the end cover (20) relative to the height adjusting piece (30) in the horizontal direction is-20 degrees to 20 degrees; and/or the presence of a gas in the gas,
the rotation angle of the end cover (20) around the axis of the height adjusting piece (30) relative to the height adjusting piece (30) ranges from-10 degrees to 10 degrees.
10. The adjustable artificial vertebral body according to any one of claims 1 to 5 further comprising a first endplate (70) and a second endplate (80), the first endplate (70) connected to the lower end of the vertebral body (10) and the second endplate (80) connected to the upper end of the end cap (20).
11. The adjustable artificial vertebral body of claim 10,
the upper surface of the first end plate (70) is provided with a plurality of first conical grooves (71), the first conical grooves (71) are arranged at intervals along the circumferential direction of the vertebral body (10), the lower end of the vertebral body (10) is provided with a plurality of first conical bosses (14) which are in one-to-one correspondence with the first conical grooves (71), the first conical bosses (14) are inserted into the first conical grooves (71), the lower surface of the second end plate (80) is provided with a plurality of second conical grooves, the second conical grooves are arranged at intervals along the circumferential direction of the vertebral body (10), the upper end of the end cover (20) is provided with a plurality of second conical bosses (23) which are in one-to-one correspondence with the second conical grooves, and the second conical bosses (23) are inserted into the second conical grooves; and/or the presence of a gas in the gas,
the upper end face of the first end plate (70) is provided with a first porous structure, and the lower end face of the second end plate (80) is provided with a second porous structure (81).
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| CN202211695368.5A CN115670758B (en) | 2022-12-28 | 2022-12-28 | Adjustable artificial vertebral body |
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| CN202211695368.5A CN115670758B (en) | 2022-12-28 | 2022-12-28 | Adjustable artificial vertebral body |
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| CN208541441U (en) * | 2017-07-20 | 2019-02-26 | 浙江嘉佑医疗器械有限公司 | Adjustable artificial vertebral body |
| CN114392016A (en) * | 2021-12-31 | 2022-04-26 | 北京纳通医疗科技控股有限公司 | Artificial vertebral body |
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| US8425606B2 (en) * | 2011-06-21 | 2013-04-23 | John A. Cowan | Method and implant device for grafting adjacent vertebral bodies |
| WO2013119803A1 (en) * | 2012-02-07 | 2013-08-15 | Medivest, Llc | Tissue spacer implants, insertion and adjustment tools, and method of use |
| CN203710189U (en) * | 2014-03-05 | 2014-07-16 | 浙江科惠医疗器械有限公司 | Artificial vertebral body adjustable in angle and retractable in height |
| CN106510905A (en) * | 2016-11-23 | 2017-03-22 | 大博医疗科技股份有限公司 | Stable and adjustable artificial vertebral body |
| CN110141406A (en) * | 2019-06-21 | 2019-08-20 | 上海长征医院 | Thoracolumbar disk implantation piece and Thoracolumbar disk artificial vertebral body |
| CN113367859A (en) * | 2021-06-07 | 2021-09-10 | 右江民族医学院附属医院 | Centrum prosthesis and adjusting device and clamping device applied to same |
| CN113693794A (en) * | 2021-08-31 | 2021-11-26 | 郝定均 | Bionic anatomical artificial cervical intervertebral disc prosthesis and holder |
| CN114699227B (en) * | 2022-06-08 | 2022-08-30 | 北京理贝尔生物工程研究所有限公司 | Vertebral body prosthesis |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN208541441U (en) * | 2017-07-20 | 2019-02-26 | 浙江嘉佑医疗器械有限公司 | Adjustable artificial vertebral body |
| CN114392016A (en) * | 2021-12-31 | 2022-04-26 | 北京纳通医疗科技控股有限公司 | Artificial vertebral body |
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