CN210749446U - Vertebral bone filling and supporting device - Google Patents
Vertebral bone filling and supporting device Download PDFInfo
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- CN210749446U CN210749446U CN201920655283.1U CN201920655283U CN210749446U CN 210749446 U CN210749446 U CN 210749446U CN 201920655283 U CN201920655283 U CN 201920655283U CN 210749446 U CN210749446 U CN 210749446U
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Abstract
The utility model provides a strutting arrangement is filled to centrum bone, include: the implant comprises a central pipe part and a plurality of peripheral bulges, wherein one end of the central pipe part is a blind end, and the other end of the central pipe part is an injection port; the peripheral protrusions are arranged on the central pipe part main body, and the peripheral protrusions are distributed in a divergent manner along the peripheral direction of the outer wall of the central pipe part; the inner cavity of the peripheral bulge part is communicated with the inner cavity of the central tube part; the central line of the central pipe part is a straight line or an arc line; the central tube body and the peripheral protrusions are made of soft elastic materials, and when pressure is applied to the inner cavity of the central tube, the peripheral protrusions can expand and stretch to form a support structure. Thereby solving the defect that the fracture part is difficult to be uniformly spread to all directions for resetting by the existing product. The utility model discloses make bone cement's leakage rate reduce to zero, reduce because of the emergence of bone necrosis that the heat injury caused appears in bone cement for pouring into of piece to can be most effective directional recovery the centrum height that the end plate sinks.
Description
Technical Field
The utility model relates to a bone cement technical field, in particular to strutting arrangement is filled to centrum bone.
Background
Currently, China is in the prevalence of economic development, people are aging day by day and people pay attention to quality of life, and osteoporosis is concerned and becomes a global public health problem. Osteoporotic Vertebral Compression Fractures (OVCF) are one of the most common complications of osteoporosis and are also a significant cause of disability and death in the elderly. For vertebral compression fracture, the traditional treatment is mainly conservative, including lying in bed, relieving pain, wearing chest and waist braces and the like, 84% of patients leave acute and chronic chest and waist pain, spinal deformity and the like, daily life is limited, spinal function is influenced, and life quality is reduced. In the prior art, due to the fact that the holding force is insufficient due to osteoporosis of patients, loosening of screws and internal fixation failure are prone to occur, although most students in recent years develop bone cement screws for treating osteoporosis spine fracture and bring new hopes to the patients, most patients are forced to give up internal fixation surgical treatment due to the fact that the patients cannot tolerate anesthesia due to the fact that medical diseases are combined.
For the patients, local anesthesia descending Percutaneous Vertebroplasty (PVP) and kyphoplasty (PKP) are the most accepted minimally invasive methods for effectively treating OVCF at present, however, the 2 surgical methods have higher bone cement leakage rate, and the leakage rate of the former is 11-76% and the leakage rate of the latter is about 4.8-39.0% according to literature reports. In order to further reduce the leakage rate of the bone cement and improve the operation safety, the bone cement is pushed to the former to expand to form a sac cavity, the bone cement is injected at low pressure, firstly, the bone cement is expanded by the Kyphon Balloon Kyphoplasty (BKP) in 1994, Mark Reiley utility model, the FDA approves the clinical application of the bone cement in 1998 to expand through the indirect action of a hydraulic system, the collapsed vertebral body is reset and compressed, the cavity is manufactured, the cavity belongs to soft expansion, and the expansion is not easy to orient. The utility model discloses a ware of 2004 Israel Disc-O-Tech company adopts macromolecular material to make Sky bone Expander Kyphoplasty (EKP), and the anterior art of packing into cylindrical expander is folded out and is expanded, and for rigid expansion, can orient, the shortcoming is: the position of the expanded body with limited expansion height can not be changed, the height of the expanded body can not be adjusted, and the expanded body is shaped like mulberry, so that the height of the middle part of the vertebral body is slightly restored, and the improvement of the convex Cobb angle is not good. A-Spine company in 2007 has a novel technology of forming a filled vertebral body by a bone sac bag (Vesselplasty), and is formally introduced into China after the certification of food and drug administration in China is obtained in 2013. The Vessel-X sac filler adopted by the technology is a mesh bag-shaped structure which is formed by mutually weaving high polymer materials in a staggered way, the purpose of expansion can be achieved by directly pouring viscous bone cement, the compact high polymer mesh layer structure can wrap most of the bone cement, only a small amount of the bone cement is allowed to permeate out of the mesh layer, so that the occurrence of bone cement leakage can be effectively controlled, the leakage rate is still 1.7-54.5% according to the report of a literature, the cement is prevented from permeating outwards due to the limitation of the mesh bag, the micro-locking between the bone cement and a bone trabecula is blocked, the loosening of a bone cement mass in the mesh bag and the bone cement mass is released outside a vertebral body after operation and the report of the literature, then the mesh bag bone cement still exists in the vertebral body in a mass state, the local strength and the temperature during polymerization reaction are overhigh, the temperature of the polymerization exothermic reaction of the bone cement is up to 47-100 ℃ according to, the exothermic heat of polymerization of the bone cement has a certain relationship with the thickness of the bone cement, and the thicker the bone cement, the more heat is released.
Bone cement leakage is one of the most common complications with the most serious consequences in minimally invasive treatment of spinal compression fracture, leakage is reduced by pushing in the bone cement drawing period and the bone cement lump period, but the bone cement is not uniformly dispersed, so that mechanical gradient formed at the local part of a perfusion segment after operation is poor, bone cortex of the non-perfusion segment and adjacent segment vertebral bodies are easy to fracture again, and the bone cement lump formed in the vertebral bodies is frequently displaced. And the toxic reaction, allergy, shock and the like of the bone cement.
To date, all the existing shaping systems on the market cause leakage, non-uniform distribution of the injected bone cement, thermal injury, toxic reaction, and later bone cement displacement, which are main urgent problems to be solved in the existing spine vertebroplasty.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a strutting arrangement is filled to centrum bone, the device can have solved bone cement seepage and toxic reaction completely to reduce its aversion, make moreover to fill the thick liquids and distribute evenly, reduce because of the bone cement appears the osteonecrosis emergence that the thermal injury caused for pouring into of agglomerate, and can restore the centrum height that the end plate subsides most effectively directionally, and bone cement forms the even good device system of similar bone trabecula column support atress.
In order to realize the task, the utility model discloses take following technical solution:
a vertebral bone filling support device comprising:
the implant comprises a central pipe part and a plurality of peripheral bulges, wherein one end of the central pipe part is a blind end, and the other end of the central pipe part is an injection port; the peripheral protrusions are arranged on the central pipe part main body, and the peripheral protrusions are distributed in a divergent manner along the peripheral direction of the outer wall of the central pipe part; the inner cavity of the peripheral bulge part is communicated with the inner cavity of the central tube part;
the central tube body and the peripheral protrusions are both made of soft elastic materials, and when pressure is applied to the inner cavity of the central tube, the peripheral protrusions can expand and stretch to form a support structure.
As a further improvement of the utility model, the filling opening is filled with the filling slurry through injection in when the central tube portion is internal, the filling slurry pushes the bulge portion on every side to stretch into and solidify in the bone tissue after expanding.
As a further improvement, the central tube is of a cylindrical structure, the protruding part is of a round platform structure, one end of the protruding part is a blind end, the other end is an open end, and the open end is connected with the central tube.
As a further improvement of the present invention, the peripheral protrusion portion is uniformly arranged in a ring shape along the circumferential direction of the central tube portion, and the peripheral protrusion portion is uniformly arranged in the axial direction of the central tube portion.
As a further improvement of the utility model, the adjacent annular peripheral protrusions are arranged in a staggered manner.
As a further improvement of the utility model, the central line of the central pipe part is a straight line; the wall thickness of the peripheral protrusion part of the central tube part arranged on the side of the non-fractured tissue is larger than that of the peripheral protrusion part arranged on the side of the fracture cavity.
As a further improvement of the utility model, the central line of the central pipe part is an arc line; wherein, the peripheral protruding part includes outer bend portion and interior bend portion, and the peripheral protruding part wall thickness of outer bend portion is less than the peripheral protruding part wall thickness of interior bend portion.
As a further improvement of the present invention, the present invention further comprises:
the auxiliary positioning piece comprises a positioning core part and a clamping part, and the clamping part is arranged at the end part of the positioning core part; the inner wall of the blind end is provided with a clamping groove, after the auxiliary positioning piece extends into the inner cavity of the central tube part, the clamping part is in internal contact with the blind end, the core part is rotationally positioned, and the clamping part can be locked and fixed with the clamping groove.
As a further improvement of the present invention, the implant further comprises: and the developing clamping rings are arranged at the front end, the middle end and the rear end of the outer wall of the central pipe part.
As a further improvement of the utility model, the inner wall of the injection opening is provided with an internal thread.
Compared with the prior art, the utility model discloses following beneficial effect has:
the utility model discloses a strutting arrangement is filled to centrum bone, the jut is hollow structure around the implant, with central pipe portion inner face connection, sets up jut around many rings around central pipe portion, central pipe portion main part and the expandable expansion of soft elastic material of jut around, when exerting pressure to central pipe portion inner chamber, the jut can expand to extend around and form bearing structure. When the implant is placed into a vertebral body, the implant can be easily placed into the vertebral body with pathological changes through the channel, cement can enter through the peripheral protrusion part of the side opening, and the implant gradually expands and extends around the central tube to form columnar extension of the bone-like trabecula and bone tissues due to the gradual increase of the posterior perfusion pressure; then the bone cement is ossified to form uniform trapezoidal columnar support. The divergent peripheral bulge part of the implant solves the leakage during the bone cement infusion, so that the leakage rate of the bone cement is reduced to zero; meanwhile, the defect that bone cement injected into a vertebral body by the existing forming system is not uniformly distributed in a conglobation manner is overcome, the bone-like trabecula is formed to ensure that the perfusion slurry is uniformly distributed, the lower end wall part and the rear end wall part of the bone-like trabecula are thickened to ensure that the perfusion slurry flows to the front end and the upper end of the peripheral protrusion part, and the front middle part of the fractured vertebral body is gradually and uniformly collapsed, and the columnar support is effectively reset to correct the rear convex deformity; the existence of local mechanical gradient of the pathological vertebral body is reduced through the uniform distribution of the bone cement, and the risks of fracture of the postoperative pathological vertebral body and height loss and fracture of the adjacent segment vertebral body are greatly reduced. The existing bone cement block is replaced by the divergent peripheral protrusion part, so that the thermal injury caused by polymerization reaction during the distribution of the bone cement block is solved, and the thermal injury caused by the bone cement block is reduced.
Furthermore, when three metal wires are arranged in the front, middle and rear of the wall part of the central pipeline of the device and are positioned at the position deviated from the front of the center line of the vertebral body through perspective determination, when bone cement is directly poured through the central pipe part, the device is convenient for positioning and tracking and observation of instruments.
Further, the device is at the wall thickness that is close the trapezoidal column of trabecula of the bone trabecula formation portion of centrum lower extreme and rear for 1 time of front end and upper end, the meaning of this design lies in when injecting bone cement, the protruding portion easily expands around being located front end and upper end, pressure is higher than lower extreme and rear, often take place in the middle part before the centrum and the subside of last end plate because of the compression fracture of centrum, lead to the density of the cortex of fracture centrum top and the place ahead to be higher than remaining centrum not fracture portion, the expansion of protruding portion formation portion is according to centrum internal pressure distribution around, there is the trend that is less than regional expansion, lower extreme and rear end wall portion force bone cement flow direction to upper end and the protruding portion around the front end that easily expands, thereby solved all products on the existing market and hardly evenly strut the fracture position to each direction and carry out the drawback.
Furthermore, the peripheral protruding parts are distributed in a staggered mode to form gaps, so that residual bone trabeculae in the vertebral body can be settled in the gaps, the vertebral body bone filling and supporting device is stabilized in the vertebral body after fracture healing, and the loosening and displacement of bone cement caused by movable extrusion of a patient in the later period are reduced.
Drawings
FIG. 1 is a schematic cross-sectional view of the vertebral bone filling and supporting device of the present invention;
fig. 2 is a schematic view (linear type) of the vertebral body bone filling and supporting device according to the present invention after expansion and extension;
fig. 3 is a schematic view (bending type) of the vertebral body bone filling and supporting device according to the present invention after expansion and extension;
fig. 4 is a partial cross-sectional view (bent type) of the vertebral body bone filling and supporting device of the present invention after expansion and extension;
fig. 5 is a schematic end view (blind end) of the expanded and expanded vertebral body bone filling and supporting device of the present invention;
fig. 6 is a partial cross-sectional view (dimension) of the expanded vertebral body bone filling and supporting device of the present invention;
FIG. 7 is a view showing the state of the vertebral body bone filling and supporting device of the present invention implanted in a vertebral body;
fig. 8 is a schematic view (single linear type) of the vertebral body bone filling and supporting device of the present invention implanted inside the vertebral body;
fig. 9 is a schematic view (two linear types) of the vertebral body bone filling and supporting device of the present invention implanted into the interior of the vertebral body;
fig. 10 is a schematic view (single bending type) of the vertebral body bone filling and supporting device of the present invention implanted inside the vertebral body;
wherein 100 is an implant, 101 is a peripheral protrusion part, 102 is a central tube part, 103 is a developing snap ring, 104 is an injection port, 105 is a blind end, and 106 is a clamping groove; 1011 is an outer curved portion and 1012 is an inner curved portion; 200 is an auxiliary positioning piece, 201 is a positioning core part, and 202 is a clamping part; 300 is perfusion slurry, 400 is a vertebral body, 401 is a fracture gap cavity, 402 is non-fractured tissue, and 500 is a bone cement injection device.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1 to 6, the utility model relates to a vertebral body bone filling and supporting device, which comprises:
an implant 100 comprising a central tubular portion 102 and a plurality of peripheral projections 101, said central tubular portion 102 having a blind end 105 at one end and an injection port 104 at the other end; the peripheral protrusions 101 are arranged on the main body of the central pipe part 102, and the peripheral protrusions 101 are distributed in a divergent manner along the circumferential direction of the outer wall of the central pipe part 102; the inner cavity of the peripheral protrusion part 101 is communicated with the inner cavity of the central pipe part 102; the center line of the central tube portion 102 is a straight line or an arc line;
the main body of the central tube 102 and the peripheral projections 101 are both made of soft elastic material, and when pressure is applied to the inner cavity of the central tube 102, the peripheral projections 101 can expand and expand to form a support structure. When the injection port 104 is filled with the injection slurry 300 by injection into the central tube portion 102, the injection slurry 300 pushes the peripheral protrusion 101 to expand and then extend into and solidify into the bone tissue. The divergent peripheral bulge part of the implant solves the leakage during the bone cement infusion, so that the leakage rate of the bone cement is reduced to zero; meanwhile, the defect that bone cement injected into a vertebral body by the existing forming system is in a lumpy and uneven distribution is overcome, and the peripheral bulge part 101 is of a bone-like trabecula structure so that the distribution of the perfusion slurry is even.
Preferably, the central tube part 102 is a cylindrical structure, the peripheral protrusion part 101 is a circular truncated cone structure, one end of the peripheral protrusion part 101 is a blind end, and the other end is an open end, and the open end is connected with the central tube part 102. The cement diffuses from the bottom to the top of the circular truncated cone structure, so that the cement can flow and expand conveniently.
Preferably, the circumferential protrusions 101 are uniformly arranged in a ring shape along the circumferential direction of the central tube portion 102, and the ring-shaped circumferential protrusions are uniformly arranged along the axial direction of the central tube portion 102.
Preferably, adjacent annular circumferential projections are arranged offset.
Preferably, the wall thickness of the peripheral protrusion of the central tube portion 102 on the side of the non-fractured tissue 402 is greater than the wall thickness of the peripheral protrusion on the side of the fracture cavity 401. When bone cement is injected, the peripheral protrusions 101 located at the front end and the upper end are easily expanded and the pressure is higher than that at the lower end and the rear. The expansion of the peripheral protruding part 101 is distributed according to the internal pressure of the vertebral body, and tends to be lower than the regional expansion, and the thickening of the lower end and the rear end wall part forces the bone cement to flow to the upper end and the front end forming part which are easy to expand for distraction reduction, thereby solving the defect that the fracture part is difficult to uniformly distract in all directions for reduction by the existing product.
Preferably, the method further comprises the following steps:
an auxiliary positioning member 200 including a positioning core portion 201 and a chucking portion 202, the chucking portion 202 being provided at an end of the positioning core portion 201; the inner wall of the blind end 105 is provided with a clamping groove 106, after the auxiliary positioning piece 200 extends into the inner cavity of the central tube part 102, the clamping part 202 is contacted with the inner part of the blind end 105, the core part 201 is rotationally positioned, and the clamping part 202 can be locked and fixed with the clamping groove 106. After the positioning core part 201 is rotated to the preset position, the clamping part 202 can be unlocked from the clamping groove 106, and the auxiliary positioning part 20 is withdrawn.
Preferably, the implant 100 further comprises: and the developing snap ring 103, and the developing snap ring 103 is arranged at the front, middle and rear ends of the outer wall of the central pipe part 102. To ensure an optimal position for implantation of the device.
Preferably, the inner wall of the injection port 104 is provided with an internal thread. Is convenient for being in threaded connection with the bone cement injection device.
Example 1
As shown in fig. 1, 2 and 5, a vertebral bone filling and supporting device includes an elastic implant 100 and an auxiliary positioning member 200; the overall outer structure of the central tube portion 102 is a cylindrical hollow structure with a diameter of about 5.0 mm; the peripheral protrusion part 101 is a trapezoidal columnar hollow structure (a round table structure), one end of the peripheral protrusion part is a blind end, the opening of the other end of the peripheral protrusion part is connected with the inner surface of the central tube part 102, 10 peripheral protrusion parts 101 are arranged around the circumference of the central tube part 102, the total length of 7 circles is about 25cm, when the device is placed, the hollow fold of the vertebral body bone filling and supporting device is arranged at the inner opening, and the device can be easily placed into a diseased vertebral body through a passage expanded by an operation; the device has a developing ring 103 made of three metal wires at the front, middle and rear of the outer wall of the central tube 102. When the developing snap ring 103 is positioned at the anterior position of the centrum through perspective determination, when the perfusion slurry 300 (such as bone cement) is directly poured through the filling port 104 of the central tube part 102, the far end of the developing snap ring is a blind end 105, the perfusion slurry 300 can enter the peripheral protrusion part 101 with the lateral opening, and 70 peripheral protrusion parts 101 around the central tube part 102 gradually expand and extend to form a bone-like trabecula extending into the bone tissue due to the gradually increased backward pouring pressure; then the bone cement is solidified to form a uniform round table-shaped support.
The auxiliary positioning member 200 comprises a positioning core part 201 and a clamping part 202, the clamping part 202 is arranged at the end part of the positioning core part 201, the side wall of the blind end 105 is provided with a clamping groove 106, after the auxiliary positioning member 200 extends into the inner cavity of the central tube part 102, the clamping part 202 is in internal contact with the blind end 105 of the central tube part 102, the positioning core part 201 is rotated, and the clamping part 202 can be locked and fixed with the clamping groove 106. The implant 100 can be accurately delivered into the diseased vertebral body 400 by the auxiliary positioner 200. The main body of the clamping part 202 is a disc structure, and the disc is provided with a buckle matched with the clamping groove 106.
The compression fracture of centrum often takes place in the middle part before the centrum and the collapse of last endplate, leads to the density of the cortex of bone in fracture centrum top and the front to be higher than remaining centrum non-fracture portion, and consequently the device is 1 times for front end and upper end at the wall thickness of jut 101 around being close centrum lower extreme and rear, and the characteristics of this structure lie in when pushing bone cement, are located front end and upper end around jut 101 and easily expand, and pressure is higher than lower extreme and rear. The utility model discloses a surrounding jut 101's expansion is according to centrum internal pressure distribution, and directional trend that is less than regional expansion, lower extreme and rear end wall portion bodiness force bone cement flow direction easily expanded upper end and front end formation portion strut and reset to solved current product and hardly strutted the drawback that resets to each direction evenly with the fracture position.
The circular truncated cone-shaped design enables the formed peripheral protrusion part 101 to be similar to the principle of a jack, the bottom is 3.5mm in large diameter, the top is 1.5mm in small diameter, and the maximum supporting force is exerted to reset. There are 10 peripheral protrusions 101 extending around the central tube portion 1021, and 7 turns with a total length of about 27 mm.
In order to prevent that the distance is too big between the protruding portion 101 on the adjacent circle on every side, causes the inhomogeneous condition of holding power, the utility model discloses a protruding portion 101 will wholly rotate clockwise 15 for preceding round on every side of 2 nd circle, fill the space between the protruding portion 101 on every side of 1 st circle for structure interval span reduces evenly distributed between trabecula and trabecula.
Example 2
As shown in fig. 1, fig. 3, fig. 4 and fig. 5, the whole structure of the vertebral body bone filling and supporting device of the present invention is the same as that of embodiment 1, except that: the central tube part 102 is in a micro-arc structure after being completely expanded, 70 peripheral protrusions 101 are arranged in an arc shape along the axial direction of the central tube part 102, and the axis of the central tube part 102 is parallel to the external coronal plane of the peripheral protrusions 101.
Wherein, the wall thickness of the peripheral protrusion on the outer bending part 1011 of the arc structure is half of the wall thickness of the peripheral protrusion on the inner bending part 1012. The outer curvature 1011 is correspondingly disposed at the fracture cavity 401 and the inner curvature 1012 is disposed at the non-fractured tissue 402.
The perfusion slurry 300 may be bone cement, PMMA, CPC, etc.
As shown in fig. 6, the vertebral body bone filling and supporting device of the present invention can be set with three types of models, large, medium and small, to adapt to the surgical requirements of different objects, taking the medium size as an example, the size of the dimension is as follows:
a, the total height is 20 mm; b, the total length is 27 mm; c, the diameter of the central tube is 4.0 mm; d, the diameter of the central hollow tube is 2.4 mm; e, the diameter of the base of the peripheral protrusion part 101 is 3.5 mm; f, 1.5mm of the blind end of the peripheral bulge part 101; h, the distance between the convex side type first ring of trabeculae and the second ring of trabeculae is 4.8 mm; g, the space between the concave side bone trabeculae is 3.0 mm; j: the distance between the coaxial bone trabeculae is 4.9 mm.
As shown in fig. 7-10, the utility model relates to a supporting device is filled to centrum bone, its application method is as follows:
1. the channel tube used in the vertebroplasty currently used in clinical practice can be easily inserted into the diseased vertebral body 400. the device has a developing snap ring 103 of developing titanium alloy in the front, middle and rear to ensure the best position for implanting the device, and when the projection of the middle snap ring on the positive position plate is overlapped or close to the projection position of the spinous process, the nut at the rear of the rotating channel exits from the inner core 200 of the central tube part 102.
2. When the bone cement injection device 500 is matched, prepared bone cement is injected through the central tube part 102, when the bone cement approaches the peripheral raised part 101 of the upper opening of the central tube part 102, the fold part is gradually opened and slowly expanded, the expansion principle is soft material, the bone cement injection is liquid, the peripheral raised part 101 is in a state of liquid when encountering hard non-fractured tissues 402, can bypass and avoid to extend to other soft tissues or gaps, namely fracture crack cavities 401, cuts small bone trabeculae which are not fractured at the periphery, and can be expanded to form a frustum-shaped structure;
fig. 8 and 9 show the linear structure of the embodiment 1, and one vertebral bone filling and supporting device (fig. 8) or two vertebral bone filling and supporting devices (fig. 9) are placed according to the operation requirement.
Fig. 10 is a curved configuration of example 2, with the curved profile of the implant 100 conforming to the curved configuration of the vertebral body 400.
3. Along with the pushing of the bone cement at the back, the pressure in the peripheral protrusion part 101 is gradually increased, and due to the thickening of the capsule walls of the bone trabecular structures at the lower part and the back part, the pressure is concentrated towards the forming parts at the upper part and the front end, the fractured end plate and the collapsed centrum cortex are supported and reset, and the gap between the bone trabecular pillars is filled with the residual fractured cancellous bone in the embedded centrum bone tissue of the trapezoid cylindrical structure which is gradually formed and solidified. The fracture completely restricts the movement of the device after healing.
4. Wherein the grouting slurry 300 such as bone cement (bone cement) can be polymethyl methacrylate (PMMA), Hydroxyapatite (HA), or bone substitute (bone substitute), such as gypsum, calcium phosphate, calcium sulfate series, etc., without limitation;
the utility model provides a few problems of clinical existence, technical scheme more than adopting compares with prior art, has following advantage and positive effect:
1. the leakage during the bone cement perfusion is completely solved, so that the leakage rate of the bone cement is reduced to zero;
2. the defect that bone cement injected into a vertebral body by all forming systems in the market is unevenly distributed in a conglobation shape is overcome, the bone-like trabecula is formed to enable the perfusion slurry to be evenly distributed, the lower end wall part and the rear end wall part of the bone-like trabecula are thickened to enable the perfusion slurry to flow to the forming part at the front end and the upper end of the forming part, and the front middle part of the fractured vertebral body is gradually and evenly collapsed, and the columnar support is effectively reset and corrected for the convex deformity;
3. the existence of local mechanical gradient of the pathological vertebral body is reduced through the uniform distribution of the bone cement, and the risks of fracture and height loss of the postoperative pathological vertebral body and fracture of the adjacent segment vertebral body are reduced.
4. The lumpy bone cement is replaced by 70 projections 101 with the thickness of 3.5mm, the thermal damage of the polymerization reaction during the distribution of the bone cement lumpy blocks is solved, and the thickness of the bone cement influences the temperature of polymerization heat release, and the bone cement has no thermal damage when being 5mm thick and can cause thermal damage when being more than 5mm thick;
5. gaps are formed in the peripheral protruding parts 101 in a staggered manner, so that residual bone trabeculae in the vertebral body can be settled in the gaps, the vertebral body bone filling and supporting device is stabilized in the vertebral body after fracture healing, and the loosening and displacement of bone cement caused by the movable extrusion of a patient in the later period are reduced;
6. the closed device of the bone-like trabecula completely solves the adverse reactions of bone cement monomer such as toxicity, allergy, inflammation, embolism and the like contacting with human body;
7. the device has the characteristic of no leakage, breaks through the contraindication of the use of the incompleteness person due to the damage of the vertebral body back wall of all vertebral body forming systems in the current market, and enlarges the indications of the product;
the above embodiments are only used to illustrate the technical solution of the present invention and not to limit the same, although the present invention is described in detail with reference to the above embodiments, those skilled in the art can still modify or equally replace the specific embodiments of the present invention, and any modification or equivalent replacement that does not depart from the spirit and scope of the present invention is within the protection scope of the claims of the present invention.
Claims (10)
1. A vertebral bone filling support device, comprising:
an implant (100) comprising a central tube portion (102) and a plurality of peripheral projections (101), said central tube portion (102) having a blind end (105) at one end and an injection port (104) at the other end; the peripheral protrusions (101) are arranged on the main body of the central pipe part (102), and the peripheral protrusions (101) are distributed in a divergent shape along the circumferential direction of the outer wall of the central pipe part (102); the inner cavity of the peripheral protrusion part (101) is communicated with the inner cavity of the central pipe part (102);
the material of the main body of the central tube part (102) and the material of the peripheral protrusion part (101) are both soft elastic materials, and when pressure is applied to the inner cavity of the central tube part (102), the peripheral protrusion part (101) can expand and stretch to form a supporting structure.
2. The vertebral bone filling support device of claim 1, wherein the injection port (104) is filled with a perfusion slurry (300) by injection into the central tube portion (102), the perfusion slurry (300) pushing against the peripheral protrusion (101) to expand and then to be inserted into and solidified into the bone tissue.
3. The vertebral bone filling support device according to claim 1, wherein said central tube portion (102) is of a cylindrical configuration, said peripheral protrusion (101) is of a frustoconical configuration, and said peripheral protrusion (101) has a blind end at one end and an open end at the other end, said open end being connected to said central tube portion (102).
4. The vertebral bone filling support device according to claim 1, wherein said circumferential protrusions (101) are uniformly arranged in a ring shape along the circumferential direction of said central tube portion (102), and the ring-shaped circumferential protrusions are uniformly arranged along the axial direction of said central tube portion (102).
5. The vertebral bone filling support device of claim 4, wherein adjacent annular circumferential protrusions are offset.
6. The vertebral bone filling support device of claim 1, wherein a centerline of the central tube portion (102) is straight; the wall thickness of the peripheral protrusion of the central tube part (102) on the side of the non-fractured tissue (402) is larger than that of the peripheral protrusion on the side of the fracture cavity (401).
7. The vertebral bone filling support device of claim 1, wherein a centerline of the central tube portion (102) is arcuate; the peripheral protrusion (101) comprises an outer bending part (1011) and an inner bending part (1012), and the wall thickness of the peripheral protrusion of the outer bending part (1011) is smaller than that of the peripheral protrusion of the inner bending part (1012).
8. The vertebral bone filling support device of any one of claims 1 to 7, further comprising:
the auxiliary positioning piece (200) comprises a positioning core part (201) and a clamping part (202), wherein the clamping part (202) is arranged at the end part of the positioning core part (201); the inner wall of the blind end (105) is provided with a clamping groove (106), after the auxiliary positioning piece (200) extends into the inner cavity of the central tube part (102), the clamping part (202) is in contact with the inner part of the blind end (105), the core part (201) is rotationally positioned, and the clamping part (202) can be locked and fixed with the clamping groove (106).
9. The vertebral bone filling support device according to any one of claims 1 to 7, wherein said implant (100) further comprises: and the developing snap ring (103), and the developing snap ring (103) is arranged at the front end, the middle end and the rear end of the outer wall of the central pipe part (102).
10. The vertebral bone filling support device according to any one of claims 1 to 7, wherein the inner wall of the injection port (104) is provided with an internal thread.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920655283.1U CN210749446U (en) | 2019-05-09 | 2019-05-09 | Vertebral bone filling and supporting device |
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| CN201920655283.1U CN210749446U (en) | 2019-05-09 | 2019-05-09 | Vertebral bone filling and supporting device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110025371A (en) * | 2019-05-09 | 2019-07-19 | 郝定均 | Vertebral bone fills support device |
| WO2022057017A1 (en) * | 2020-09-17 | 2022-03-24 | 山东冠龙医疗用品有限公司 | Vertebral body expanding and filling device and propeller |
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2019
- 2019-05-09 CN CN201920655283.1U patent/CN210749446U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110025371A (en) * | 2019-05-09 | 2019-07-19 | 郝定均 | Vertebral bone fills support device |
| WO2022057017A1 (en) * | 2020-09-17 | 2022-03-24 | 山东冠龙医疗用品有限公司 | Vertebral body expanding and filling device and propeller |
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