Patent Description:
In the operation of filling or inserting the medical filler into the bone, the current surgical methods commonly include the following:.

When using a mechanical expanding device (such as patents <CIT>, <CIT>, <CIT>, <CIT>, <CIT>, <CIT>, <CIT>, <CIT>, <CIT>) for bone expanding to generate a space in the bone, the expanding device is taken out after expanding, then a covering device is inserted, and then the operation for filling or stuffing of the medical filler is performed. This type of operation has the following disadvantages: Mechanical expanding devices crush the cancellous bone when expanding and the crushed fragments often fall into the mechanical expanding device, which causes the mechanical expanding device to get stuck, and makes the expanded element unable to be retracted (recovered to a contracted state), this results in that the entire mechanical expanding device is stuck. Thereby, it cannot be retracted from the expanded position.

When a filling expanding device (such as patents <CIT>, <CIT>, <CIT>, <CIT>, <CIT>, <CIT>, <CIT>, <CIT>) for bone expanding to generate a space in the bone are used, the expanding device is taken out after expanding, then a covering device is inserted, and then the operation for filling or stuffing of the medical filler is performed. Because the filling expanding device mostly puts a balloon into the bone, and uses high pressure to inject liquid (such as water) into the balloon (a variety of balloons are used for different needs), the balloon is inflated to push the cancellous bone into the bone to achieve the purpose of expanding. However, the device or method has many disadvantages, for example, the balloon must be connected to a nozzle, so when the filling of the liquid is under high pressure, it may cause the balloon to fall off from the nozzle, and the balloon may even burst.

Without expanding in advance, the covering device is directly placed into the bone and the medical filler is injected, and the pressure under which the medical filler is injected into the covering device is used to achieve the effect of spreading the bone. Under such a situation, the covering device is both an expanding device and a vertebrae fixation device when infusing the medical filler (such as patents <CIT>, <CIT>, <CIT>). Alternatively, the covering device is even abandoned, and a perfusion device is directly used to inject the medical filler into the surgical position to enhance the fixation of the surgical position (such as patent <CIT>). This kind of surgery has the following disadvantages: Because no expanding is performed first, the range of perfusion cannot be accurately controlled, so that the direction after finishing perfusion may be different from that originally expected by the doctor, and it is even found that the covering device does not completely support the bone or the medical filler flows around in the bone after the medical filler is injected, and the medical filler may even flow out of the bone, or the concentration of the slurry medical filler may be too thin or the particle is too small, which makes it difficult to support the bone when infusing the medical filler, and greatly reduces the original effect.

The mechanical expanding device can be used as a vertebrae fixation device (such as patents <CIT>, <CIT>, <CIT>, <CIT>, <CIT>, <CIT>). After the mechanical expanding device is implanted into the bone and the bone is opened, the medical filler is injected, the medical filler is allowed to cover the mechanical expanding device, and the mechanical expanding device and the medical filler are left in the human body together after the filling is finished. This kind of surgical method uses no covering device, the flow direction of the medical filler cannot be effectively controlled, and thus it is possible for the medical filler to flow around the bone, and even to flow out of the bone. In addition, the medical filler cannot effectively and completely cover the mechanical expanding device, and the mechanical expanding device may thus slowly contract from a fully expanded state to an incompletely expanded state. As a result, the bones are not completely expanded, which means that the original purpose of the vertebrae fixation device is lost.

<CIT> discloses systems and methods of delivering and deploying a stent into a curvilinear cavity within a vertebral body or other bony or body structure. In some instances, the system can include an elongate shaft for delivering a self-expanding, cement-directing stent and devices that may be used to perform the steps to deliver and deploy the stent.

<CIT> discloses a vertebral stent. The vertebral stent is transported in an elongated mold in an application pipe and fulfills a supporting function in the vertebral body in the elongated mold. The vertebral stent is made of mold memory alloy and partially has a grid- or mesh structure. The vertebral stent has a holding element at its distal end, where the holding element is accessible through the interior of vertebral stent and is positioned in an application device. Another holding element is provided at a proximal end of vertebral stent, in which another application device is positioned.

A covering device can be used to cover the expansion device as a vertebral fixation device (such as patent <CIT>). The covering device can effectively prevent fragments of the crushed cancellous bone from falling into the expansion device during expanding, so that the expansion device can be repeatedly expanded and contracted in the bone for expanding to adjust the direction of expanding or the size of the expanding range, and to control the range of perfusion of the medical filler by the covering device when infusing the medical filler. After the perfusion is finished, the medical filler can completely cover the expansion device. However, the pores of the covering device of this invention are not three-dimensional connecting pores, so the effect of the perfused medical filler and bones to achieve interdigitate is poor. Secondly, the medical filler in the covering device is solid, and its strength is far higher than that of cancellous bone in the bone, which is likely to cause stress concentration, which makes it difficult for bone cells near the implant to grow after surgery.

The present invention uses a three-dimensional porous device to control the perfusion range of the medical filler, and since the three-dimensional porous device has a three-dimensional connecting pore structure, the medical filler subsequently injected is closer to the structure of the cancellous bone and less likely to have stress concentration. In addition, the medical filler flows through the three-dimensional connecting pore structure and contacts the vertebrae, which is more likely to achieve an interdigitate effect. Furthermore, the three-dimensional porous device can apply biodegradable materials, and the medical filler will form countless three-dimensional connecting channels therein with the three-dimensional porous device degraded later in the body, and the bone cells can grow into the medical filler through these connecting channels and form a denser connection with the medical filler.

The three-dimensional porous device of the present invention can automatically expand after being compressed, it expands after being placed in a vertebrae in a compressed state, and the three-dimensional porous device is filled with a medical filler. The medical filler interdigitates into the vertebrae by the three-dimensional porous device and is connected to the vertebrae. The three-dimensional porous device can effectively control the flow direction and perfusion range of the medical filler, and prevent the medical filler from running around in the vertebrae. In addition, because the three-dimensional porous device has a three-dimensional connecting pore structure, the injected medical filler will be closer to the structure of the cancellous bone in the vertebrae, and its mechanical performance will be closer to that of cancellous bone. Thus, it is less likely to have problematic stress concentration and is advantageous for bone cell growth after the operation. After the three-dimensional porous device is slowly degraded in the body, multiple connecting channels will be formed in the medical filler to provide bone cell growth, so that the bones and the medical filler are connected closer.

A purpose of the present invention is to provide a vertebral implant having a three-dimensional porous device.

Yet another purpose of the present invention is to provide a vertebral implant having a three-dimensional porous device capable of being compressed and expanded.

A further purpose of the present invention is to provide a vertebral implant having a function of expanding the bone.

Another further purpose of the present invention is to provide a vertebral implant using a three-dimensional porous device to control a flow direction and a perfusion range of a medical filler.

Another purpose of the present invention is to provide a vertebral implant using a three-dimensional porous device to enhance the interdigitate effect of a medical filler.

Yet another purpose of the present invention is to provide a vertebral implant using a compression piece to compress a three-dimensional porous device in advance.

A vertebral implant of the present invention comprises: a stuffing including: a perfusion device having a proximal end being an injection port, the perfusion device having at least one perfusion port; and a three-dimensional porous device covering at least part of the perfusion device and covering the at least one perfusion port, wherein the three-dimensional porous device is capable of automatically expanding after being compressed; a hollow tube having a distal end being connected with the proximal end of the stuffing by a detachable structure; and a medical filler being filled into the three-dimensional porous device via the hollow tube and the perfusion device, wherein the three-dimensional porous device is a three-dimensional connecting pore structure.

The perfusion port may be a perfusion port with any conventional form, such as a groove, a hole, etc. so that the medical filler can be filled into the three-dimensional porous device through the perfusion port.

The three-dimensional porous device can effectively control the flow direction and perfusion range of the medical filler, and prevent the medical filler from running around in the vertebrae, causing uneven perfusion, or even the medical filler flowing out of the vertebrae, causing a risk to the patient, and effectively achieve the interdigitate effect, so that the medical filler and the vertebrae are connected more closely. In addition, the size, porosity, etc. of the three-dimensional connecting pore structure can be adjusted to not only control the overall mechanical strength of the medical filler and the three-dimensional porous device to make its mechanical performance closer to the strength of cancellous bone in the vertebrae for preventing stress concentration and being beneficial to the growth of bone cells after surgery, but also be used to adjust the smoothness of perfusion of the medical filler into the three-dimensional porous device.

The aforementioned three-dimensional connecting pore structure may further be a three-dimensional connecting pore structure with a fixed pore size (see <FIG>), a three-dimensional connecting pore structure with different pore sizes (see <FIG>), or a three-dimensional connecting pore structure being hollow inside (see <FIG>) can be selected with three-dimensional porous devices with appropriate pore sizes according to the different thicknesses of the medical filler or bone looseness. On one hand, the smoothness of the perfusion of the medical filler can be increased. On the other hand, the mechanical performance of the completely formed medical filler and three-dimensional porous device can be adjusted through the selection of the pore size.

The pore size of the three-dimensional porous device may be <NUM> to <NUM>.

The three-dimensional porous device may further be an expandable three-dimensional porous device, and the expandable three-dimensional porous device is in a pre-compressed state before entering the vertebrae, and is expandable after being inserted into the vertebrae, so as to facilitate the subsequent perfusion of the medical filler. The three-dimensional porous device can also expand with the filling of the medical filler after the three-dimensional porous device enters the vertebrae, the expandable three-dimensional porous device can be foam, sponge, or any compressible/expandible three-dimensional porous elastomer.

In the three-dimensional porous device described above, the material forming the structure of the three-dimensional porous device may be any conventional biocompatible material, such as polyethylene, polyurethane, polyvinyl alcohol, nylon, silicone, etc., or may further be biodegradable materials, such as polylactic acid, gelatin, alginate, polyglycolic acid, polyhydroxy fatty acid esters, polycaprolactone, etc. In this way, after the three-dimensional porous device and the medical filler are implanted into the human body, the three-dimensional porous device can be slowly degraded in the human body. The structure of the three-dimensional porous device will form multiple connecting channels in the medical filler, and the bone cells can grow into the medical filler through these connecting channels, and be formed to connect and be intertwined with the medical filler more closely. The material of the three-dimensional porous device is preferably a biodegradable material.

In the structure forming the three-dimensional porous device, the curved surface boundary of any pore is composed of the material mentioned above in the shape of filament/thin line, and the diameter of the filament/thin line (hereinafter referred to as the structure diameter) may be <NUM>~<NUM>. Through the selection of the structure diameter, the diameter of the connecting channel left by the three-dimensional porous device degraded in the body can be controlled. The diameter of the structure of the three-dimensional porous device therein preferably is <NUM>~ <NUM>, while <NUM>~<NUM> is preferred for bone cells to grow easily.

The stuffing described above may further include at least one fixing piece (shown as reference numeral <NUM> in <FIG>), by using the at least one fixing piece, for the operator, a farther end and a closer end of the three-dimensional porous device is fixed to the distal end and the proximal end respectively of the perfusion device. In this way, the three-dimensional porous device can be prevented from being displaced due to the excessive pressure of the medical filler and causing the medical filler to overflow into the unexpected filling direction that causes a risk or death of a patient.

The above-mentioned detachable structure of the proximal end of the hollow tube and the stuffing may be any conventional detachable structure. After the medical filler is filled into the three-dimensional porous device through the hollow tube and the perfusion device, the detachable structure can be used to detach the stuffing from the hollow tube, and to leave the stuffing in the vertebrae. The detachable mechanism can be any conventional detachable structure, such as a screw, engaging, fastening, or locking detachable structures, wherein the detachable structure of the screw is preferred.

The above-mentioned medical filler may be any conventional consolidable and slurry medical filler, such as bone cement. The above-mentioned consolidable and slurry medical filler preferably is a medical filler with osteo-conductive and/or osteo-inductive materials added thereto, such as the conventional hydroxyapatite, calcium phosphate-based bone fillers. Besides, it is also preferred to add bone-leading medical fillers, such as the conventional SrHA-based medical filler.

The vertebral implant may further include a hollow guide tube, a proximal end of the hollow guide tube has an introduction port, the stuffing enters the hollow guide tube from the introduction port, and is placed in the vertebrae under the guidance of the hollow guide tube.

The three-dimensional porous device may further include a compression piece, the compression piece is arranged around the three-dimensional porous device, and the compression piece substantially covers the three-dimensional porous device before the three-dimensional porous device is placed in the vertebrae to compress the three-dimensional porous device. After the three-dimensional porous device enters the hollow guide tube through the introduction port, the compression piece is detached from the three-dimensional porous device to make the three-dimensional porous device expand.

The compression piece may be a sleeve, and the outer diameter of the sleeve is substantially larger than the inner diameter of the introduction port (as shown in <FIG>, <FIG>). Therefore, when the stuffing and the hollow tube enter the hollow guide tube, the compression piece will automatically detach from the stuffing and stay outside the proximal end of the hollow guide tube (as shown in <FIG>, <FIG>, <FIG>). After the stuffing protrudes from the distal end of the hollow guide tube, the three-dimensional porous device expands (as shown in <FIG>). After the three-dimensional porous device is filled with the medical filler, the stuffing is removed from the hollow tube by using the detachable structure, and the stuffing is left in the vertebrae (as shown in <FIG>).

The compression piece can be a piece with easy-to-rupture lines on one side and a pre-cut groove/pre-cut hole/pre-cut line at the distal end (as shown in <FIG>, <FIG>). After the stuffing and the hollow tube enters the hollow guide tube, the easy-to-rupture line and the pre-cut groove/pre-cut hole/pre-cut line are used to rupture the compression piece and retract the hollow guide tube. After the stuffing extends out of the distal end of the hollow guide tube, the three-dimensional porous device will expand. After the medical filler is filled into the three-dimensional porous device, the stuffing is removed from the hollow tube by using the detachable structure, and the stuffing is left in the vertebrae.

The vertebral implant mentioned above further includes an injector, a distal end of the injector is connected to the proximal end of the hollow tube (as shown in <FIG>), and the medical filler is filled into the three-dimensional porous device by the injector.

The vertebral implant may further include an extension tube, a distal end of the extension tube, and a proximal end of the hollow tube are connected in a detachable manner, a proximal end of the extension tube and a distal end of the injector are connected in a detachable manner. The medical filler can fill the medical filler into the three-dimensional porous device by the injector. The detachable method can be any conventional detachable method, such as engaging, locking, screw, etc..

The vertebral implant may further include a blocking device, the blocking device is used to connect the proximal end of the stuffing after the medical filler is filled into the three-dimensional porous device, and the medical filler flowing out from the injection port is blocked by the blocking device. The connection between the blocking device and the proximal end of the stuffing can be any conventional connection method, such as: screw, engaging, locking, buckle, etc. The connection method therein preferably is screw or engaging.

The present invention will be apparent to those skilled in the art by reading the following detailed description of a preferred embodiment thereof, with reference to the attached drawings, in which:.

The following description with drawings and element symbols provides more detail of the embodiment of the present invention, so that those skilled in the art can implement the present invention after studying this specification.

<FIG> illustrates a diagram of a vertebral implant according to a preferred specific embodiment of the present invention. An end closer to the operator is a proximal end, and an end farther from the operator is a distal end. A stuffing <NUM> uses a fixing piece <NUM> to fix the proximal and distal ends of a three-dimensional porous device <NUM> to the proximal and distal ends of a perfusion device <NUM> (not shown in <FIG>, see <FIG>) to prevent the three-dimensional porous device <NUM> from being displaced because the perfusion pressure of the medical filler (not shown in <FIG>) is too large, which causes the medical filler to overflow in an unexpected filling direction and cause the patient possible paralysis or death. The proximal end of the stuffing <NUM> is connected to a hollow tube <NUM> by a detachable structure <NUM>, so as to remove the stuffing <NUM> from the hollow tube <NUM> and leave the stuffing <NUM> in the vertebrae after perfusion of the medical filler.

<FIG> illustrates a diagram of a vertebral implant with the stuffing <NUM> detached from the hollow tube <NUM> according to the present invention. After the medical filler is filled into the stuffing <NUM>, the detachable structure <NUM> is used to remove the stuffing <NUM> from the hollow tube <NUM>, and leave the stuffing <NUM> in the vertebrae.

<FIG> illustrates a diagram of the perfusion of a vertebral implant according to a preferred specific embodiment of the present invention. The stuffing <NUM> is used to fix the three-dimensional porous device <NUM> to a perfusion device <NUM> (not shown in <FIG>, refer to <FIG>) through a fixing piece <NUM> to avoid the displacement of the three-dimensional porous device <NUM> due to the excessive pressure of the medical filler (not shown in <FIG>), which causes the medical filler to overflow in an unexpected filling direction. The proximal end of the hollow tube <NUM> connects an injector <NUM> remotely, the injector <NUM> is used to fill the medical filler (not shown in <FIG>) into the stuffing <NUM>, and the proximal end of the stuffing <NUM> is connected to the hollow tube <NUM> by the detachable structure <NUM> to facilitate removing the stuffing <NUM> from the hollow tube <NUM> and leaving the stuffing <NUM> in the vertebrae after the perfusion of the medical filler.

<FIG> illustrates a diagram of the perfusion of a vertebral implant according to another specific embodiment of the present invention. A distal end of an extension tube <NUM> is connected to the hollow tube <NUM>, and a proximal end of extension tube <NUM> is remotely connected to the injector <NUM>. The extension tube <NUM> makes it easier for the operator to operate the injector <NUM> to fill the medical filler into the stuffing <NUM>.

<FIG> illustrates an exploded diagram of the stuffing <NUM> of a vertebral implant according to the present invention. The stuffing <NUM> is used to fix the proximal end and the distal end of the three-dimensional porous device <NUM> to the proximal end and the distal end of the perfusion device <NUM> respectively by the fixing piece <NUM>, so as to prevent the three-dimensional porous device <NUM> from being displaced due to the excessive pressure of the perfusion of the medical filler, which causes the medical filler to overflow in an unexpected filling direction. The medical filler can be filled into the three-dimensional porous device <NUM> by a perfusion port <NUM> of the perfusion device <NUM>.

<FIG> illustrates an enlarged cross-sectional view of the stuffing <NUM> of a vertebral implant according to the present invention. The stuffing <NUM> is used to fix the three-dimensional porous device <NUM> to the perfusion device <NUM> by the fixing piece <NUM>, so as to prevent the three-dimensional porous device <NUM> from being displaced due to the excessive pressure of the perfusion of the medical filler, which causes the medical filler to overflow in an unexpected filling direction. The medical filler is injected from the injection port <NUM> of the perfusion device <NUM> and filled into the three-dimensional porous device <NUM> through the injection port <NUM> of the perfusion device <NUM>.

<FIG> illustrate three specific examples of the three-dimensional porous device <NUM> of a vertebral implant according to preferred embodiments of the present invention. <FIG> shows the three-dimensional porous device <NUM> having a three-dimensional connecting pore structure with a uniform size of pore <NUM>. The pressure of the medical filler, and the smoothness of flow can be adjusted by controlling the size of the pore <NUM> of the three-dimensional porous device <NUM>. The material of the structure <NUM> of the three-dimensional porous device <NUM> is biodegradable. After the three-dimensional porous device <NUM> and the medical filler (not shown) are implanted in the human body, the structure <NUM> of the three-dimensional porous device <NUM> will slowly degrade in the human body and form multiple connecting channels in the medical filler, bone cells can grow into the medical filler through these connecting channels, and a tighter intertwined connection with the medical filler is formed.

<FIG> shows a three-dimensional porous device <NUM> with a hollow interior and a three-dimensional connecting pore structure with uniformly sized pores <NUM> on the periphery. In this way, the medical filler being filled into the three-dimensional porous device <NUM> may have better fluidity and smoothness, and the flow direction of the medical filler can be controlled through the three-dimensional porous device <NUM> with the three-dimensional connecting pore structure, and the interdigitate effect of the medical filler is increased, so that the connection between the three-dimensional porous device <NUM> and the vertebrae is closer.

<FIG> shows the three-dimensional porous device <NUM> having a three-dimensional connecting pore structure with different porosities. An inner layer <NUM> has a larger porosity and an outer layer <NUM> has a smaller porosity, the three-dimensional porous device <NUM> effectively achieves bone interdigitate effect, and the flow direction of the medical filler can be controlled/limited, so as to avoid excessive overflow of the medical filler, which may cause danger to the patient.

<FIG> illustrates a diagram of a specific example of a compression piece <NUM> of a vertebral implant according to the present invention. The compression piece <NUM> is arranged around the three-dimensional porous device <NUM> (not shown, refer to <FIG>), and the three-dimensional porous device <NUM> is covered before being placed in the vertebrae, so as to compress the three-dimensional porous device <NUM>.

<FIG> illustrates an exploded diagram of a specific example of a combination of the compression piece <NUM> and a hollow guide tube <NUM> of a vertebral implant according to the present invention. The compression piece <NUM> is arranged around the three-dimensional porous device <NUM>, and the three-dimensional porous device <NUM> is covered before being injected into the vertebrae to compress the three-dimensional porous device <NUM>. The proximal end of the hollow guide tube <NUM> has an introduction port <NUM> (not shown, refer to <FIG>) , the stuffing <NUM> enters the hollow guide tube <NUM> by way of the introduction port <NUM> and enters the vertebrae through the guide of hollow guide tube <NUM>.

<FIG> illustrate a diagram of surgical steps with a combination of a compression piece <NUM> and a hollow guide tube <NUM> of a vertebral implant according to the present invention. As shown in <FIG>, the hollow tube <NUM>, the compression piece <NUM>, and the hollow guide tube <NUM> are shown. The stuffing <NUM> is aligned with the introduction port <NUM> on the proximal end of the hollow guide tube <NUM>. As shown in <FIG>, the hollow tube <NUM> and stuffing <NUM> (not shown) enter the hollow guide tube <NUM> from the proximal end of the hollow guide tube <NUM>. The compression piece <NUM> is left outside the introduction port <NUM> at the proximal end of the hollow guide tube <NUM> because the outer diameter of the compression piece <NUM> is greater than the inner diameter of the introduction port <NUM>. As shown in <FIG>, the stuffing <NUM> extends from the distal end of the hollow guide tube <NUM>, and extends out of the hollow guide tube <NUM> into the vertebrae, and the compression piece <NUM> is left outside the introduction port <NUM> at the proximal end of the hollow guide tube <NUM>. The length of the compression piece <NUM> can be used to control the stuffing <NUM> and the hollow tube <NUM> to extend as far as the distal end of the hollow guide tube <NUM> as a moderate length (that is, the depth of the stuffing <NUM> entering the vertebrae is a moderate depth). As shown in <FIG>: After the stuffing <NUM> extends out of the distal end of the hollow guide tube <NUM> and enters the vertebrae, the three-dimensional porous device <NUM> of the stuffing <NUM> is automatically expanded without being restricted by the compression piece <NUM>. As shown in <FIG>, after the medical filler is filled to the stuffing <NUM> via the hollow tube <NUM>, the detachable structure <NUM> is used to detach the stuffing <NUM> from the hollow tube <NUM> and leave the stuffing <NUM> in the vertebrae.

<FIG> illustrates the compression piece <NUM> of a vertebral implant according to another preferred embodiment of the present invention. The compression piece <NUM> covers the stuffing <NUM> (not shown, refer to <FIG>), that is, part of the hollow tube <NUM> is used to compress the three-dimensional porous device <NUM> (not shown, refer to <FIG>), so that the stuffing <NUM> can enter the hollow guide tube <NUM>. The side of the compression piece <NUM> has an easy-to-rupture line <NUM> (see <FIG>). After at least part of the compression piece <NUM> and the stuffing <NUM> therein enter the hollow guide tube <NUM> from the introduction port <NUM>, the compression piece <NUM> can be ruptured apart by the easy-to-rupture line <NUM> and removed from the stuffing <NUM>, that is, the periphery of hollow tube <NUM>, so that the three-dimensional porous device <NUM> will not be limited by the compression piece <NUM> after extending out of the distal end of the hollow guide tube <NUM>.

<FIG> illustrates a cross-sectional view of the compression piece <NUM> of a vertebral implant according to the present invention. The compression piece <NUM> is arranged outside the stuffing <NUM> and covers and compresses the three-dimensional stuffing <NUM>, so that the three-dimensional porous device <NUM> can easily enter the vertebrae through the hollow guide tube <NUM>.

<FIG> illustrates an enlarged diagram of a compression piece <NUM> of a vertebral implant according to the present invention. The compression piece <NUM> is allowed to be easily ruptured apart and removed from the periphery of the stuffing <NUM> after entering the hollow guide tube <NUM> by the side easy-to-rupture line <NUM> and a remote pre-cut line <NUM>, so that the three-dimensional porous device <NUM> expands after extending from the distal end of the hollow guide tube <NUM>.

<FIG> illustrate diagrams of surgical steps (not claimed) with a vertebral implant according to the present invention. As shown in <FIG>, the stuffing <NUM> is placed in the vertebrae by the guide of the hollow guide tube <NUM>. As shown in <FIG>, after the stuffing <NUM> enters the vertebrae, the three-dimensional porous device <NUM> is expanded because the restriction of the compression piece <NUM> is removed, and then the medical filler is filled to the stuffing <NUM> through the hollow tube <NUM> by the injector <NUM>.

<FIG> illustrates a diagram of another preferred surgical perfusion (not claimed) of a vertebral implant according to the present invention. The hollow tube <NUM> and the injector <NUM> are connected to an angled extension tube <NUM>, so that the operator can fill the medical filler more conveniently and handily to the stuffing <NUM>.

Claim 1:
A vertebral implant comprising:
a stuffing (<NUM>) including:
a perfusion device (<NUM>) having a proximal end being an injection port (<NUM>), the perfusion device (<NUM>) having at least one perfusion port (<NUM>); and
a three-dimensional porous device (<NUM>) covering at least part of the perfusion device (<NUM>) and covering the at least one perfusion port (<NUM>;
a hollow tube (<NUM>) having a distal end being connected with the proximal end of the stuffing (<NUM>) by a detachable structure (<NUM>); and
a medical filler (<NUM>) being filled into the three-dimensional porous device (<NUM>) via the hollow tube (<NUM>) and the perfusion device (<NUM>);
characterized in that the three-dimensional porous device (<NUM>) is a three-dimensional connecting pore structure, and in that the three-dimensional porous device (<NUM>) is capable of automatically expanding after being compressed.