Summary of the invention
Main purpose of the present invention is to provide a kind of artificial neural plate and canalis spinalis to expand instrument, fixes unstable problem to solve artificial neural plate of the prior art.
To achieve these goals, according to an aspect of the present invention, provide a kind of artificial neural plate, comprising: upper support and lower support and the body between upper support and lower support, the trabecular bone structure body with multidirectional micropore at least partially for growing into for osteocyte of body.
Further, upper support protrudes from first side in the longitudinal direction of body along the length direction of body, and on the first side, upper support is positioned at one end of the side towards vertebral foramen away from body.
Further, the projected direction of upper support favours the length direction of body.
Further, lower support protrudes from second side in the longitudinal direction of body along the length direction of body, and on the second side, lower support is positioned at one end of the side towards vertebral foramen away from body.
Further, the projected direction of lower support favours the length direction of body.
Further, body also comprises framework, and framework is arranged on the outside of trabecular bone structure body towards the side of vertebral foramen.
Further, upper support and lower support are connected in framework.
Further, artificial neural plate adopts titanium alloy and/or absorbable material to make.
Further, absorbable material comprises calcium-magnesium alloy.
Further, the complete soak time of artificial neural plate is no less than 12 months.
According to a further aspect in the invention, provide a kind of canalis spinalis and expand instrument, canalis spinalis expands instrument for expanding the space of the canalis spinalis of vertebral body in human body, and expansion instrument comprises two above-mentioned artificial neural plates.
Further, when canalis spinalis expand instrument be in be arranged to epicentral state time, two artificial neural plates are separately positioned on the both sides of vertebral body, a part with spinous process for the upper support and connection vertebral body of artificial neural plate, the lower support of artificial neural plate connects a part with lateral mass for vertebral body, and the body of artificial neural plate is between a part with lateral mass with a part of vertebral body of spinous process for vertebral body.
Further, when canalis spinalis expansion instrument is in the state be arranged on the vertebral plate of vertebral body, two artificial neural plates are arranged on the both sides of vertebral body symmetrically.
Further, canalis spinalis expands instrument and also comprises multiple staple, and multiple staple is used for the vertebral plate upper support of artificial neural plate and lower support being fixed on vertebral body.
Apply technical scheme of the present invention, artificial neural plate has trabecular bone structure body, the matsurface of the similar cancellous bone structure that trabecular bone structure body has, the embedded combination in the face that combines between the higher and lower levels of this matsurface and the vertebral body embedded by artificial neural plate, provide incipient stability function to form the support to vertebral body to the artificial neural plate after implanting, maintain the canal space expanded, and grow into along with osteocyte in human recovery process and capillary vessel are creeped along the micropore of trabecular bone structure body, trabecular bone structure body finally can form the Embedded structure of the activated fusion of tool, the autologous vertebral plate of artificial neural plate and vertebral body is combined together, no longer forever rely on nail to fix, more firmly self-retaining at a specified future date can be realized.
Detailed description of the invention
It should be noted that, when not conflicting, the embodiment in the application and the feature in embodiment can combine mutually.Below with reference to the accompanying drawings and describe the present invention in detail in conjunction with the embodiments.
According to an aspect of the present invention, provide a kind of artificial neural plate, as shown in Figures 1 to 3, this artificial neural plate comprises: upper support 20, lower support 30 and the body between upper support 20 and lower support 30, the trabecular bone structure body 11 with multidirectional micropore at least partially for growing into for osteocyte of body.
Artificial neural plate of the present invention has trabecular bone structure body 11, the matsurface of the similar cancellous bone structure that trabecular bone structure body 11 has, the embedded combination in the face that combines between the higher and lower levels of this matsurface and the vertebral body embedded by artificial neural plate, provide incipient stability function to form the support to vertebral body to the artificial neural plate after implanting, maintain the canal space expanded, and grow into along with osteocyte in human recovery process and capillary vessel are creeped along the micropore of trabecular bone structure body 11, trabecular bone structure body 11 finally can form the Embedded structure of the activated fusion of tool, the autologous vertebral plate of artificial neural plate and vertebral body is combined together, no longer forever rely on nail to fix, more firmly self-retaining at a specified future date can be realized.
Preferably, as shown in Figures 2 and 3, upper support 20 protrudes from first side in the longitudinal direction of body along the length direction of body, and on the first side, upper support 20 is positioned at one end of the side towards vertebral foramen away from body.Preferably, the projected direction of upper support 20 favours the length direction of body.
Preferably, as shown in Figures 2 and 3, lower support 30 protrudes from second side in the longitudinal direction of body along the length direction of body, and on the second side, lower support 30 is positioned at one end of the side towards vertebral foramen away from body.Preferably, the projected direction of lower support 30 favours the length direction of body.
Upper support 20 all needs to coordinate with vertebral body with the angle between body with the angle between body and lower support 30, to realize more firm fixing.
Preferably, body also comprises framework 12, and framework 12 is arranged on the outside of trabecular bone structure body 11 towards the side of vertebral foramen.More preferably, upper support 20 is connected in framework 12 with lower support 30.Framework 12 is entity structure, non-trabecular bone structure, and therefore intensity is large, is suitable as the connection structural bodies of support 20 and lower support 30.
Preferably, vertebral plate adopts titanium alloy and/or absorbable material to make.Titanium alloy comprises the medical titanium alloys such as Ti6Al4V; Absorbable material comprises calcium-magnesium alloy.Absorbable material can also be the material that other slowly can be degraded voluntarily human body people, such as organic material etc.
More preferably, the complete soak time of vertebral body structure is no less than 12 months.
Below describe a kind of embodiment of artificial neural plate of the present invention in detail, as shown in Figures 1 to 3, this artificial neural plate comprises: upper support 20, lower support 30 and the body between upper support 20 and lower support 30, and the length of body and thickness can have the selection of plurality of specifications model, to adapt to the size of different vertebral bodys.The hole of upper support 20 and lower support 30 is used for artificial neural plate and vertebral body to fix, and angle and the radian of upper support 20 and lower support 30 adopt anatomical form design, can better and vertebral body fit.
The surface, face of merging up and down of artificial neural plate is provided with the microcellular structure of growing into for osteocyte, this microcellular structure is a kind of multidirectional micro hole structure be interconnected, the diameter range of hole is 300 microns to 1500 microns, it is more preferably 500 microns to 1000 microns, this hole is conducive to osteocyte and creeps and grow into, and makes artificial neural plate faying face and physiological bone structure generation bone merge to reach steady in a long-term.
According to another aspect of the present invention, additionally provide a kind of canalis spinalis and expand instrument, canalis spinalis expands instrument for expanding the space of the canalis spinalis of vertebral body in human body, and expansion instrument comprises two above-mentioned artificial neural plates.
Canalis spinalis of the present invention is adopted to expand instrument, one can be realized and " rise and push up " laminoplasty of formula to expand sagittal canal diameter, namely to open seam groove in bilateral lamina outer rim, cut off vertebral plate holostrome and form " Sheng Ding gap ", archecenra is made to form the Part I with spinous process and the Part II be connected with lateral mass, then by Part I together with spinous process rearward lifting, sagittal canal diameter is made to be able to effective expansion, again artificial neural plate is placed between the Part I after lifting and Part II, keep the state of the canalis spinalis after expanding, to maintain permanent " rising top ".The laminoplasty that should " rise and push up " formula does not need to peel off supraspinous soft tissue, namely vertebral structure can retain complete soft tissue, less to the injury of human body, more be beneficial to the recovery of human body, and avoid changing cervical vertebra or thoracic vertebra, the power set structure of lumbar vertebra, motor pattern, prevent Lordosis loss, even kyphosis deformity, avoid spinal motion amplitude obviously limited.
Preferably, as shown in Figure 4, when canalis spinalis expansion instrument is in the state be arranged on the vertebral plate of vertebral body, two artificial neural plates are arranged on the both sides of vertebral body, the upper support 20 of artificial neural plate connects a part with spinous process for vertebral body, the lower support 30 of artificial neural plate connects a part with lateral mass for vertebral body, and the body of artificial neural plate is between the part with spinous process and a part with lateral mass for vertebral body of vertebral plate.
In a kind of preferred embodiment, when canalis spinalis expand instrument be in be arranged to epicentral state time, two artificial neural plates are arranged on the both sides of vertebral body symmetrically.
As shown in Figure 4, canalis spinalis expands instrument and also comprises multiple staple, and multiple staple is used for the vertebral plate upper support 20 of artificial neural plate and lower support 30 being fixed on vertebral body.In another kind of embodiment, the lower support 30 of artificial neural plate is connected on the lateral mass of vertebral body.
At fixing early stage of artificial vertebral body, sclerotin also do not grow into or in not complete trabecular bone structure body 11 of growing into time, artificial neural plate is fixed on vertebral plate by nail, treats that trabecular bone structure body 11 finally forms the activated fusion damascene structures of tool, after realizing self-retaining, nail can be removed.
In yet another aspect, artificial neural plate of the present invention can also be used for traditional open-door laminoplasty expansion laminoplasty.Namely to open seam groove in bilateral lamina outer rim, retain side vertebral plate inner panel as " door-hinge ", cut off opposite side vertebral plate holostrome and form " enabling crack between a door and its frame ", then vertebral plate is started to " door-hinge ", complete single open-door action.Again vertebral plate supporting titanium plate is placed between the vertebral plate after enabling and lateral mass, on vertebral plate and lateral mass, inserts hold-down screw respectively, to maintain permanent " enabling ", thus realize the expansion of canalis spinalis.Be placed between the vertebral plate after enabling and lateral mass during use, maintain and open the door.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.