Surgical system for correcting spinal conditions
By using a spinal implant system with a four-hole domino joint, combined with bone fasteners and tightening screws, the problem of insufficient implant stability in existing spinal disorders is solved, achieving more efficient spinal stability and correction effects.
Patent Information
- Application Number
- CN202380088414.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Priority Date
- 2022-12-28
- Filing Date
- 2023-12-18
- Publication Date
- 2025-08-01
AI Technical Summary
Existing treatment methods for spinal disorders such as drugs, rehabilitation and exercise are often unable to effectively relieve symptoms such as deformity, pain and nerve damage, while surgical treatments have the problem of insufficient implant stability.
A spinal implant system using a four-hole domino joint allows stable fixation and correction of the spine by providing bone fasteners and tightening screws in the components and extensions of the implant, combining an integral spinal rod and a correction rod.
It improves the stability and correction effect of spinal implants, can effectively fix and lengthen the spinal rod, provide a larger stroke space on the rod, and enhances the stability and correction ability of the spinal column.
Smart Images
Figure CN120417846A_ABST
Abstract
Description
[0001] This application claims the benefit of U.S. Provisional Patent Application Serial No. 18 / 089,756, filed Dec. 28, 2022, the entire content of which is incorporated herein by reference. Technical Field
[0002] The present disclosure generally relates to medical devices for treating musculoskeletal disorders, and more particularly to surgical systems and methods for correcting spinal disorders. Background Art
[0003] Spinal pathologies and disorders, such as scoliosis and other curvature abnormalities, kyphosis, degenerative disc disease, disc herniation, osteoporosis, spondylolisthesis, stenosis, tumors, and fractures can be caused by factors including trauma, disease, and degenerative conditions including injury and aging. Spinal disorders typically result in symptoms including deformity, pain, nerve damage, and partial or complete loss of mobility.
[0004] Non-surgical treatments, such as medications, rehabilitation, and exercise, may be effective, but may not relieve the symptoms associated with these disorders. Surgical treatments for these spinal disorders include correction, fusion, fixation, discectomy, laminectomy, and implantable prostheses. Correction treatments for positioning and alignment may employ implants, such as vertebral rods and bone screws, to stabilize the treated segment of the spine. The present disclosure describes improvements to these prior arts. Summary of the Invention
[0005] In one embodiment, in accordance with the principles of the present disclosure, a spinal implant includes a body including a first wall. A first portion includes spaced-apart first and second components each extending from a first side of the first wall. The first component includes spaced-apart first and second extensions. The second component includes spaced-apart third and fourth extensions. The first and second extensions define a first opening. The third and fourth extensions define a second opening. A space between the first and second components defines a cavity configured to receive a head of a bone fastener. The head and the openings are configured to receive a first spinal rod therein. A second portion extends from an opposite second side of the first wall. The second portion includes a second wall spaced apart from the first wall. Opposite surfaces of the walls define a channel configured to receive a second spinal rod.
[0006] In one embodiment, in accordance with the principles of the present disclosure, a surgical system includes a spinal implant that includes a body having a first wall. The spinal implant includes a first portion that includes a first component and a second component spaced apart from each other and each extending from a first side of the first wall. The first component includes a first extension and a second extension spaced apart from each other. The second component includes a third extension and a fourth extension spaced apart from each other. The first extension and the second extension define a first opening. The third extension and the fourth extension define a second opening. The space between the first component and the second component defines a cavity. The spinal implant includes a second portion extending from a second, opposite side of the first wall. The second portion includes a second wall spaced apart from the first wall. Opposite surfaces of the walls define a channel. A bone fastener has a head positioned within the cavity. A first spinal rod is disposed within the head and the opening. A second spinal rod is disposed within the channel.
[0007] In one embodiment, in accordance with the principles of the present disclosure, a surgical system includes an integral spinal implant that includes a body having a first wall. The spinal implant includes a first portion that includes a first component and a second component spaced apart from each other and each extending from a first side of the first wall. The first component includes a first extension and a second extension spaced apart from each other. The second component includes a third extension and a fourth extension spaced apart from each other. The first extension and the second extension define a first opening. The third extension and the fourth extension define a second opening. The space between the first component and the second component defines a cavity. The spinal implant includes a second portion extending from a second, opposite side of the first wall. The second portion includes a second wall spaced apart from the first wall. Opposite surfaces of the walls define a channel. A bone fastener has a head positioned within the cavity. A first spinal rod is disposed within the head and the opening. A second spinal rod is disposed within the channel. The first extension includes a first surface defining a first threaded hole extending therethrough and a second surface extending from the first surface. The second surface extends at an acute angle relative to the first surface. The third extension includes a third surface defining a second threaded hole extending therethrough and a fourth surface extending from the third surface, the fourth surface extending at an acute angle relative to the third surface. The surgical system includes a first set screw disposed within the first threaded hole and a second set screw disposed within the second threaded hole such that the set screws directly engage the first spinal rod. The second side includes a first thread and a second thread spaced apart from each other. The second wall includes a third thread and a fourth thread spaced apart from each other. The surgical system includes a third set screw disposed with the first thread and the third thread and a fourth set screw disposed with the second thread and the fourth thread such that the third set screw and the fourth set screw directly engage the second spinal rod.
[0008] Additional features and advantages of the various embodiments will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the various embodiments. The objectives and other advantages of the various embodiments will be realized and attained by means of the elements and combinations particularly pointed out in the specification and the appended claims. BRIEF DESCRIPTION OF THE DRAWINGS
[0009] The present disclosure will become more readily apparent from the following detailed description of the accompanying drawings, in which:
[0010] Figure 1 is a perspective view of a spinal implant of a surgical system in accordance with the principles of the present disclosure;
[0011] Figure 2 is Figure 1 a perspective view of the spinal implant shown in
[0012] Figure 3 is Figure 1 a perspective view of the spinal implant shown in
[0013] Figure 4 is a side view of a bone fastener of a surgical system in accordance with the principles of the present disclosure;
[0014] Figure 5 is a plan view showing the bone fastener shown in Figure 4 in set with a vertebra and a spinal rod of a surgical system set with the bone fastener;
[0015] Figure 6 is a plan view showing the bone fastener shown in Figure 4 in set with a vertebra and the spinal rod shown in Figure 5 in set with the bone fastener;
[0016] Figure 7 is a plan view showing a spinal implant shown in Figure 5 in set with the spinal rod shown in Figure 1 and a correction rod of a surgical system in accordance with the principles of the present disclosure;
[0017] Figure 8 is a plan view showing a spinal implant shown in Figure 5 in set with the spinal rod shown in Figure 7 and the correction rod shown in Figure 1 ; and
[0018] Figure 9 is a plan view showing a spinal implant shown in Figure 5 in set with the spinal rod shown in Figure 7 and the correction rod shown in Figure 1A plan view of a spinal implant as shown, where the corrective rod is bent to be parallel or substantially parallel to the spinal rod. Detailed Description
[0019] For the purposes of this specification and the appended claims, unless otherwise indicated, all numbers expressing quantities of amounts, percentages or proportions of materials, and other numerical values used in this specification and the claims shall be understood to be modified in all instances by the term "about". Accordingly, unless indicated to the contrary, the numerical parameters set forth in the following specification and attached claims are approximations that may vary depending upon the desired properties sought to be obtained by the present invention. At the very least, and not as an attempt to limit the application of the doctrine of equivalents to the scope of the claims, each numerical parameter should at least be construed in light of the number of reported significant digits and by applying ordinary rounding techniques.
[0020] Although the numerical ranges and parameters setting forth the broad scope of the invention disclosed herein are approximations; the numerical values set forth in the specific examples are reported as precisely as possible. However, any numerical value inherently contains certain errors necessarily resulting from the standard deviation found in its corresponding testing measurements. In addition, all ranges disclosed herein are to be understood to encompass any and all sub-ranges subsumed therein. For example, the range "1 to 10" includes any and all sub-ranges between the minimum value 1 and the maximum value 10 (and inclusive thereof), that is, any and all sub-ranges having a minimum value equal to or greater than 1 and a maximum value equal to or less than 10, such as 5.5 to 10.
[0021] The present disclosure relates to a surgical system that includes a spinal implant, such as, for example, a domino joint having more than two holes for attaching generally parallel rods, where the domino joint can be placed around an existing screw head. Specifically, a four-hole domino joint that is more robust than a two-hole domino joint is disclosed herein. One of ordinary skill in the art will appreciate that there is a greater need for run-on rod when using the four-hole domino joint disclosed herein compared to using a smaller counterpart, such as, for example, a two-hole domino joint. The opportunity for two spaced-apart run-on rods greater than 10 mm on each side of the screw head presented by the disclosed four-hole domino joint is more likely than a single 20 mm run-on rod space. Thus, a domino joint, such as those disclosed herein, that can be mounted on both sides of an existing screw head has an advantage over domino joints that require long run-on rods (e.g., two-hole domino joints).
[0022] Reference will now be made in detail to certain embodiments of the present invention, examples of which are illustrated in the accompanying drawings. While the invention will be described in connection with the embodiments shown, it should be understood that it is not intended to limit the invention to those embodiments. On the contrary, the invention is intended to cover all alternatives, modifications, and equivalents that may be included within the scope of the invention as defined by the appended claims.
[0023] As Figures 1 to 3 best shown in, a surgical system, such as, for example, spinal implant system 10, includes a domino joint, such as, for example, spinal implant 12. Implant 12 includes a body 14 having a wall 16. Implant 12 includes a portion 18 that includes spaced-apart components 20, 22 that each extend from a side 24 of wall 16. Component 20 includes spaced-apart extensions 26, 28, and component 22 includes spaced-apart extensions 30, 32. Extensions 26, 28 define a compartment or opening 34, and extensions 30, 32 define a compartment or opening 36. As Figures 7 to 9 shown, openings 34, 36 extend parallel to and / or coaxial with each other and are configured to receive an existing spinal rod, such as, for example, rod 40. That is, as Figure 5 and Figure 6 shown and discussed in more detail herein, rod 40 is configured to be inserted into openings 34, 36 after rod 40 is coupled to tissue (such as, for example, vertebral tissue) by fasteners (such as, for example, bone fasteners 42). In some embodiments, implant 12 is integral and / or integrally formed.
[0024] In some embodiments, extension 26 includes a surface 44 that defines a threaded hole 46 extending therethrough and a surface 48 that extends from surface 44. In some embodiments, extension 30 includes a surface 50 that defines a threaded hole 52 extending therethrough and a surface 54 that extends from surface 50. As Figure 8 and Figure 9 shown, hole 46 is configured to receive set screw 60, and hole 52 is configured to receive set screw 62 such that when rod 40 is disposed in openings 34, 36, set screws 60, 62 directly engage rod 40 to fix rod 40 relative to implant 12, as discussed herein.
[0025] In some embodiments, surface 48 extends at an acute angle relative to surface 44, and surface 54 extends at an acute angle relative to surface 50. As Figure 9As shown and discussed in more detail herein, angling surfaces 48, 54 relative to surfaces 44, 50 provides space for positioning a rod bender to bend a spinal rod (such as, for example, a corrective rod 56 disposed in channel 58 of implant 12) such that at least a portion of rod 56 can be bent to be parallel or substantially parallel to rod 40. Holes 46 extend laterally and / or vertically to opening 34, and holes 52 extend laterally and / or vertically to opening 36 such that holes 46, 52 extend parallel to each other, hole 46 is in communication with opening 34, and hole 52 is in communication with opening 36. In some embodiments, surfaces 44, 50 extend parallel to each other and are in a common plane. In some embodiments, surfaces 48, 54 extend parallel to each other and are in a common plane.
[0026] The space between components 20, 22 defines cavity 38 which is configured to receive at least a portion of bone fastener 42. Specifically, as Figure 4 best shown, bone fastener 42 includes shaft 64 and head 66 coupled to shaft 64. As Figures 6 to 9 shown, head 66 is configured to be received in cavity 38 and includes spaced arms 68, 70 which define therebetween implant cavity 72 which is configured to receive rod 40. Specifically, in some embodiments, implant cavity 72 is aligned and / or coaxial with openings 34, 36 such that when rod 40 is disposed in implant cavity 72 and head 66 is positioned in cavity 38, rod 40 can be inserted into openings 34, 36 as discussed herein. In some embodiments, head 66 is integrally formed with shaft 64 such that head 66 is permanently fixed relative to shaft 64. In some embodiments, head 66 can rotate relative to shaft 64 in multiple planes and / or axes to define a multi-axis screw.
[0027] Implant 12 includes portion 74 extending from side 76 of wall 16 opposite side 24. Portion 74 includes wall 78 spaced from wall 16. Opposing surfaces 80, 82 of walls 16, 78 define channel 58. In some embodiments, channel 58 extends parallel to openings 34, 36. Surface 80 includes spaced threads 84, 86, and surface 82 includes spaced threads 88, 90. As Figure 9 shown, threads 84, 86 are configured to engage set screw 92, and threads 88, 90 are configured to engage set screw 94 such that when rod 56 is positioned in channel 58, set screws 92, 94 directly engage rod 56 to fix rod 56 relative to implant 12 as discussed herein.
[0028] In operation and use, for example, system 10 can be used to correct an existing rod, such as, for example, rod 40, which has been implanted in a patient to lengthen rod 40. Specifically, as Figure 5And Figure 6 As shown, the shaft 64 can be threadedly coupled to tissue (such as, for example, vertebral tissue), and the rod 40 is inserted into the implant cavity 72. In some embodiments, the inner surfaces of the arms 68, 70 have threads to engage the fixation screws, and the fixation screws are threadedly coupled to the inner surfaces of the arms 68, 70 such that the fixation screws directly engage the rod 40 to fix the rod 40 relative to the head 66.
[0029] As Figure 7 shown, once the rod 40 and the bone fastener 42 are positioned with the vertebral tissue, the implant 12 is coupled to the rod 40 and the bone fastener 42 by inserting the head 66 into the cavity 38 such that the implant cavity 72 is aligned with the openings 34, 36 to simultaneously position the rod 40 within the implant cavity 72 and the openings 34, 36. At this point, as Figure 8 shown, the set screws 60, 62 can be threadedly coupled to the holes 46, 52 such that the set screws 60, 62 directly engage the rod 40 to fix the rod 40 relative to the implant 12. As Figure 8 shown, the rod 56 can be placed within the channel 58 either before or after the screws 60, 62 are threadedly coupled to the holes 46, 52 such that the set screws 60, 62 directly engage the rod 40 to fix the rod 40 relative to the implant 12. Specifically, the section 96 of the rod 56 is positioned within the channel 58 while the section 98 of the rod 56 is disposed outside of the channel 58. Then, as Figure 9 shown, for example using a rod bender, the section 98 is bent such that the section 98 extends parallel or substantially parallel to the rod 40, thereby effectively lengthening the rod 40 using the rod 56. In some embodiments, as Figure 9 shown, the opposing surfaces 16a, 16b of the wall provide space for positioning the rod bender to bend the rod 56 while the rod 56 is disposed within the channel 58 such that the section 98 can be bent parallel or substantially parallel to the rod 40. That is, the surfaces 16a, 16b provide clearance to couple the rod bender to the rod 56 and manipulate the rod 56 to bend the rod, as discussed herein. In some embodiments, the surfaces 16a, 16b provide 585 space for bending the rod. For example, in some embodiments, the surfaces 48, 54 are angled relative to the surfaces 44, 50 to provide space for a portion of the spinal rod that extends at a non-zero angle relative to another portion of the spinal rod.
[0030] It should be understood that various modifications can be made to the embodiments disclosed herein. Accordingly, the above description should not be construed as limiting, but merely as illustrative of various embodiments. Those skilled in the art can envision other modifications within the scope and spirit of the appended claims herein.
Claims
1. A spinal implant, the spinal implant comprising: A body, the body including a first wall; A first portion, the first portion including a spaced-apart first component and a second component each extending from a first side of the first wall, the first component including a spaced-apart first extension and a second extension, the second component including a spaced-apart third extension and a fourth extension, the first extension and the second extension defining a first opening, the third extension and the fourth extension defining a second opening, a space between the first component and the second component defining a cavity configured to receive a head of a bone fastener, the head and the opening being configured to receive a first spinal rod therein; And A second portion, the second portion extending from an opposite second side of the first wall, the second portion including a second wall spaced apart from the first wall, opposite surfaces of the walls defining a channel configured to receive a second spinal rod.
2. The spinal implant according to claim 1, wherein the opening extends parallel to the channel.
3. The spinal implant according to claim 1, wherein the first extension includes a first threaded hole extending therethrough, and the third extension includes a second threaded hole extending therethrough.
4. The spinal implant according to claim 3, wherein the holes extend parallel to each other.
5. The spinal implant according to claim 3, wherein the holes extend transversely to the opening.
6. The spinal implant according to claim 3, wherein the first hole communicates with the first opening, and the second hole communicates with the second opening.
7. The spinal implant according to claim 1, wherein the first extension includes a first surface defining a first threaded hole extending therethrough and a second surface extending from the first surface, the second surface extending at an acute angle relative to the first surface, the third extension includes a third surface defining a second threaded hole extending therethrough and a fourth surface extending from the third surface, the fourth surface extending at an acute angle relative to the third surface.
8. The spinal implant according to claim 1, wherein the second side includes a spaced-apart first thread and a second thread.
9. The spinal implant according to claim 8, wherein the second wall includes a spaced-apart third thread and a fourth thread, the first thread and the third thread being configured to receive a first set screw, the second thread and the fourth thread being configured to receive a second set screw.
10. The spinal implant according to claim 1, wherein the spinal implant is monolithic.
11. A surgical system, the surgical system comprising: Spinal implant, the spinal implant comprising a body having a first wall, the spinal implant comprising a first portion, the first portion including spaced-apart first and second components each extending from a first side of the first wall, the first component including spaced-apart first and second extensions, the second component including spaced-apart third and fourth extensions, the first and second extensions defining a first opening, the third and fourth extensions defining a second opening, the space between the first and second components defining a cavity, the spinal implant including a second portion extending from a second, opposite side of the first wall, the second portion including a second wall spaced from the first wall, opposite surfaces of the walls defining a channel; Bone fastener, the bone fastener having a head positioned within the cavity; A first spinal rod, the first spinal rod being disposed within the head and the opening; and A second spinal rod, the second spinal rod being disposed within the channel.
12. The surgical system according to claim 11, wherein the first extension includes a first threaded hole extending therethrough, and the third extension includes a second threaded hole extending therethrough, the surgical system including a first set screw disposed within the first threaded hole and a second set screw disposed within the second threaded hole such that the set screws directly engage the first spinal rod.
13. The surgical system according to claim 11, wherein the first extension includes a first surface defining a first threaded hole extending therethrough and a second surface extending from the first surface, the second surface extending at an acute angle relative to the first surface, the third extension includes a third surface defining a second threaded hole extending therethrough and a fourth surface extending from the third surface, the fourth surface extending at an acute angle relative to the third surface.
14. The surgical system according to claim 13, the surgical system further including a first set screw disposed within the first threaded hole and a second set screw disposed within the second threaded hole such that the set screws directly engage the first spinal rod.
15. The surgical system according to claim 11, wherein the second side includes spaced-apart first and second threads.
16. The surgical system according to claim 15, wherein the second wall includes spaced-apart third and fourth threads, the surgical system including a first set screw having the first and third threads and a second set screw having the second and fourth threads such that the set screws directly engage the second spinal rod.
17. The surgical system according to claim 11, wherein the first extension includes a first threaded hole extending therethrough, and the third extension includes a second threaded hole extending therethrough.
18. The surgical system according to claim 17, wherein the holes extend parallel to each other.
19. The surgical system according to claim 17, wherein the holes extend transversely to the opening.
20. A surgical system, the surgical system comprising: An integral spinal implant, the spinal implant including a body having a first wall, the spinal implant including a first portion, the first portion including spaced-apart first and second components each extending from a first side of the first wall, the first component including spaced-apart first and second extensions, the second component including spaced-apart third and fourth extensions, the first and second extensions defining a first opening, the third and fourth extensions defining a second opening, a space between the first and second components defining a cavity, the spinal implant including a second portion extending from a second, opposite side of the first wall, the second portion including a second wall spaced from the first wall, opposite surfaces of the walls defining a channel; A bone fastener having a head positioned within the cavity; A first spinal rod disposed within the head and the opening; And A second spinal rod disposed within the channel, wherein the first extension includes a first surface defining a first threaded hole extending therethrough and a second surface extending from the first surface, the second surface extending at an acute angle relative to the first surface, the third extension includes a third surface defining a second threaded hole extending therethrough and a fourth surface extending from the third surface, the fourth surface extending at an acute angle relative to the third surface, wherein the surgical system further includes a first set screw disposed within the first threaded hole and a second set screw disposed within the second threaded hole such that the set screws directly engage the first spinal rod, wherein the second side includes spaced-apart first and second threads, and wherein the second wall includes spaced-apart third and fourth threads, the surgical system including a third set screw disposed with the first and third threads and a fourth set screw disposed with the second and fourth threads such that the third and fourth set screws directly engage the second spinal rod.