Rotatable olif implanters and implant systems

Abstract

The application provides a rotatable OLIF implant and implant system; the rotatable OLIF implant comprises a sleeve and an implant rod; the implant rod comprises a rod body and a locking body, and the locking body has a maximum size in a first radial direction and a minimum size in a second radial direction; the implant rod is configured to be rotatable in the sleeve to adjust the angle of the first direction relative to a reference surface, and the locking body has a locking state, and when the locking body is in the locking state, the first direction is at a first angle relative to the reference surface, and the implant rod moves in the sleeve along an axial direction so that the locking body is close to the distal end of the sleeve to clamp the fusion body. The implant in the application can adjust the position during the implantation of the fusion body, avoid extruding and pulling the psoas major muscle during the implantation of the fusion body, and eliminate the potential harm of the implant to the psoas major muscle during the implantation of the fusion body.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, in particular to a rotatable OLIF implant device and implant system. BACKGROUND

[0002] OLIF is the full name of "oblique anterior approach lumbar interbody fusion", which is a fusion surgery of the lumbar anterior lateral approach. This surgery does not cut the psoas major muscle, which can effectively avoid iatrogenic injury caused by cutting the psoas major muscle. OLIF has an oblique lateral approach, which is different from the previous posterior approach.

[0003] Although the OLIF surgery does not need to cut the psoas major muscle, the traditional OLIF fusion device only has one implant plane that cooperates with the implant device. During implantation, the implant device is perpendicular to the implant plane, and the OLIF fusion device is fixedly connected with the implant device. After the OLIF fusion device is implanted into the lumbar intervertebral space along the oblique direction, the OLIF fusion device is also in an oblique state, so it is necessary to rotate the implant device to align the OLIF fusion device. During the rotation process, the implant device will squeeze and pull the psoas major muscle, which has potential harm to the psoas major muscle. SUMMARY

[0004] The purpose of the present application is to provide a rotatable OLIF implant device and implant system, which can avoid squeezing and pulling the psoas major muscle during the alignment of the fusion device, and eliminate the potential harm of the implant device to the psoas major muscle during the alignment of the fusion device.

[0005] In order to solve the problem that the existing OLIF fusion device may squeeze and pull the psoas major muscle during the alignment process, the present application provides a rotatable OLIF implant device to solve the problem that the existing fusion device may squeeze and pull the psoas major muscle during the implantation process:

[0006] The rotatable OLIF implant device includes a sleeve and an implant rod;

[0007] The implant rod includes a rod body and a locking body, the locking body is connected to the distal end of the rod body, the outer contour of the locking body has a maximum size in the first radial direction and a minimum size in the second radial direction; the maximum size is greater than the minimum size and greater than the outer diameter of the rod body, the rod body is movably arranged in the sleeve by the distal end of the sleeve, and the locking body is located outside the distal end of the sleeve, the implant rod is configured to:

[0008] The implant rod is capable of rotating in the sleeve to adjust the angle of the first direction relative to a reference plane, the reference plane passing through the rotation central axis of the implant rod, the locking body has a locked state, when the locking body is in the locked state: the first direction is at a first angle relative to the reference plane, the implant rod moves axially in the sleeve, so that the locking body is close to the distal end of the sleeve to clamp the fusion body.

[0009] Further, the locking body also has an unlocked state, when the locking body is in the unlocked state: the first direction is at a second angle relative to the reference plane, the implant rod moves axially in the sleeve, so that the locking body can extend outside the fusion body.

[0010] Further, the locking body is in a rod structure, and the locking body is perpendicular to the distal end of the rod body.

[0011] Further, the sleeve comprises a tube body and a head, the head is arranged at the distal end of the tube body, and the distal end of the head has a clamping surface, the radial maximum dimension of the clamping surface is greater than the outer diameter of the tube body.

[0012] Further, the rotatable OLIF implant device further comprises a locking member, the locking member is used to lock the rotation of the rod body when the locking body is in the locked state.

[0013] Further, the rotatable OLIF implant device further comprises a locking portion, the locking portion is arranged on the sleeve, the locking member is arranged in the locking portion, the locking member and the rod body are single degree of freedom sliding fit in the axial direction, and the locking member is circumferentially locked in the locking portion when the locking body is in the locked state.

[0014] Further, the rotatable OLIF implant device further comprises a positioning protrusion and a positioning groove, the positioning protrusion and the positioning groove are oppositely arranged in the axial direction, the positioning protrusion is arranged on one of the locking portion and the locking member, the positioning groove is arranged on the other one of the locking portion and the locking member, and the positioning protrusion is axially inserted into the positioning groove when the locking body is in the locked state.

[0015] Further, the rotatable OLIF implant device further comprises a potential energy member, the potential energy member is used to provide the locking member with the potential ability to axially slide, so that the positioning protrusion is axially inserted into the positioning groove.

[0016] Further, a locking window is arranged on the locking portion, so that the locking member in the locking portion communicates with the outside through the locking window.

[0017] Further, the implant rod further comprises an adjusting portion, the adjusting portion is connected with the proximal end of the rod body, and the locking member slides on the adjusting portion along the single degree of freedom of the axial direction.

[0018] Further, the rotatable OLIF implant device further comprises a locking member, the locking member is arranged on the sleeve, and is used to drive the locking body to press the fusion body and axially lock the position of the implant rod.

[0019] Further, the rotatable OLIF implant device further comprises a locking portion, the locking portion is arranged on the proximal end of the sleeve, and the locking member is arranged in the locking portion.

[0020] Further, the implant rod further comprises a locking rod, the locking rod is coaxially connected with the proximal end of the rod body, the locking member is in threaded transmission cooperation with the locking rod, and the locking member is configured to: when the locking member rotates relative to the locking rod in the locking portion, the axial movement of the locking member relative to the locking rod causes the axial distance between the locking member and the locking body to change.

[0021] Further, the locking portion is provided with a locking window, so that the locking member in the locking portion is in communication with the outside through the locking window.

[0022] Further, the locking member is in cylindrical shape, the locking member is in coaxial threaded transmission cooperation with the locking rod, and the locking member is provided with anti-skid protrusions on the outer circular surface.

[0023] An implant system, comprising the rotatable OLIF implant device and the fusion body, the rotatable OLIF implant device is used to cooperate with the fusion body to implant and position the fusion body.

[0024] In summary, in the rotatable OLIF implant device and the implant system provided by the application, the rotatable OLIF implant device comprises a sleeve and an implant rod; the implant rod comprises a rod body and a locking body, the locking body is connected to the distal end of the rod body, the outer contour of the locking body has a maximum size in a first radial direction and a minimum size in a second radial direction; the maximum size is greater than the minimum size and the outer diameter of the rod body, the rod body is movably arranged in the sleeve from the distal end of the sleeve, and the locking body is located outside the distal end of the sleeve, the implant rod is configured to rotate in the sleeve to adjust the angle of the first direction relative to a reference surface, the reference surface passes through the rotation central axis of the sleeve, and the implant rod has a locking state, in the locking state: the first direction is at a first angle relative to the reference surface, and the implant rod moves in the axial direction in the sleeve, so that the locking body is close to the distal end of the sleeve to clamp the fusion body.

[0025] Thus configured, the implant device of the structure, in cooperation with the dedicated fusion device, can adjust the posture of the implant device in the state connected with the fusion device, so as to make the implant device cooperate with the implant plane and the alignment plane of the fusion device, and further make the implant device switch between the implant state and the alignment state. When the alignment state is formed, the implant device moves to the direction away from the psoas major muscle on the side of the implant direction and cooperates with the corresponding alignment plane. Before the action of aligning the fusion device is implemented, the implant device is away from the psoas major muscle on the side, so that a larger movable space is reserved between the implant device and the psoas major muscle on the side, which can avoid the implant device from pressing and pulling the psoas major muscle during the alignment of the fusion device, and eliminate the potential harm of the implant device to the psoas major muscle during the alignment of the fusion device. Moreover, the implant device of the structure can drive the locking body to rotate through the cooperation of the rod body and the sleeve, so that the locking body can switch between the locked state and the unlocked posture, and further make the locking body form a clamping structure in cooperation with the distal end of the sleeve in the locked state, and also make the locking body extend into the fusion device or extend out of the fusion device in the unlocked posture, so as to realize the cooperation or separation of the implant device and the fusion device, which is convenient for the implant device to implant the fusion device, and after the implantation is completed, the implant device is separated from the fusion device, so that the implant device is taken out of the patient's body and the fusion device is retained in the patient's body. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 The structure diagram of the implant process of the existing implant device of the embodiment of the present application is shown in the figure.

[0027] Figure 2 The structure diagram of the alignment of the fusion device after the implant process of the existing implant device of the embodiment of the present application is shown in the figure.

[0028] Figure 3 The structure diagram of the fusion device of the embodiment of the present application is shown in the figure.

[0029] Figure 4 The structure diagram of the rotatable OLIF implant device of the embodiment 1 of the present application when extending into the fusion device is shown in the figure.

[0030] Figure 5 The structure diagram of the rotatable OLIF implant device of the embodiment of the present application when clamping the fusion device is shown in the figure.

[0031] Figure 6 The structure diagram of the rotatable OLIF implant device of the embodiment 2 of the present application is shown in the figure.

[0032] Figure 7 The structure diagram of the implant rod of the embodiment 2 of the present application is shown in the figure.

[0033] Figure 8 The top view structure diagram of Figure 7 is shown in the figure.

[0034] Figure 9 A schematic view of a sleeve structure of Embodiment 2 of the present application;

[0035] Figure 10 A schematic view of a locking member structure of Embodiment 2 of the present application;

[0036] Figure 11 A schematic view of a locking member structure of Embodiment 2 of the present application;

[0037] Figure 12 A schematic view of a structure of an implantation process of a rotatable OLIF implant of Embodiment 2 of the present application;

[0038] Figure 13 A schematic view of a structure of an implantation process of a rotatable OLIF implant of Embodiment 2 of the present application;

[0039] Figure 14 A schematic view of a structure of an implantation process of a rotatable OLIF implant of Embodiment 2 of the present application;

[0040] In the drawings, the reference signs are as follows:

[0041] 10 - fusion body; 11 - implantation plane; 12 - alignment plane; 13 - bone graft window; 131 - first inner wall; 132 - second inner wall; 14 - locking groove;

[0042] 20 - implant;

[0043] 21 - sleeve; 211 - sleeve body; 212 - head; 213 - clamping surface;

[0044] 22 - implant rod; 221 - rod body; 222 - locking body; 223 - adjustment portion; 234 - assembly hole; 235 - gripping surface;

[0045] 23 - locking member; 231 - positioning protrusion; 232 - positioning groove; 233 - potential energy member; 224 - locking rod;

[0046] 24 - locking portion; 241 - locking window;

[0047] 25 - locking member; 251 - anti-slip protrusion;

[0048] 26 - locking portion; 261 - locking window; 262 - abutting surface;

[0049] 27 - transition sleeve;

[0050] 28 - handle;

[0051] 30 - psoas major muscle. DETAILED DESCRIPTION

[0052] The wafer alignment device of the present application is further described in detail below in conjunction with the accompanying drawings and specific embodiments. The advantages and features of the present application will be more apparent from the following description. It should be noted that the accompanying drawings are very simplified and are not drawn to scale, and are only used to facilitate and clarify the purpose of illustrating the embodiments of the present application.

[0053] In the present application, "outer diameter" and "inner diameter" correspond to diameter for circular structure, and for non-circular structure, inner diameter refers to the diameter of its inscribed circle, and outer diameter refers to the diameter of its circumscribed circle; "axial direction" corresponds to the direction of the axis for cylindrical rod, and for non-cylindrical rod, axial direction corresponds to the length direction of the rod; in the present application, "radial direction" is referenced to the sleeve or the implant rod, since the implant rod is arranged inside the sleeve, the radial direction referenced to the sleeve is consistent with the radial direction referenced to the implant rod;

[0054] In the present application, "proximal end" and "distal end" are the relative orientation, relative position and direction of the elements or actions relative to each other from the perspective of the doctor using the product, although "proximal end" and "distal end" are not restrictive, but "proximal end" generally refers to the end of the product close to the doctor during normal operation, and "distal end" generally refers to the end first entering the patient's body.

[0055] In the present application, parallel and perpendicular should not be understood in a narrow sense as absolute perpendicular or absolute parallel relationship, but should be understood as allowing a set angle error under the premise of corresponding perpendicular or parallel, the set angle is usually 0°-10°, and the specific value of the set angle is determined according to the required working condition;

[0056] As used in the present application, the singular forms "a," "an," and "the" include plural referents unless the context clearly dictates otherwise. The term "or" is generally employed in its sense of "and / or" unless the context clearly dictates otherwise. The term "plurality" is generally employed in its sense of "two or more" unless the context clearly dictates otherwise. The terms "first," "second," "third," etc. are used only to describe a particular one of the features and do not imply or suggest a relative importance of, or a limitation to, the number of the features indicated. Thus, features defined with "first," "second," "third," etc. can explicitly or implicitly include one or at least two of the features. In addition, as used in the present application, "mounting," "connected," "connection," an element "disposed" in another element should be interpreted broadly, and generally only means that there is a connection, coupling, cooperation or transmission relationship between the two elements, and the two elements can be directly or indirectly connected, coupled, cooperated or transmitted through an intermediate element, and cannot be understood as indicating or suggesting the spatial position relationship between the two elements, i.e. one element can be in any position such as inside, outside, above, below or one side of another element, unless the context clearly indicates otherwise. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances. In addition, directional terms such as above, below, up, down, upward, downward, left, right, etc. are used with respect to the exemplary embodiments as they are shown in the drawings, upward or upward direction is toward the top of the corresponding drawing, and downward or downward direction is toward the bottom of the corresponding drawing.

[0057] Please refer to Figure 1 As shown in the figure, the conventional OLIF cage 10 is a cuboid structure, and only the side surface of the proximal end of the cage is provided with an implantation plane. During implantation, the implantation device 20 is perpendicular to the implantation plane, and the cage and the implantation device are fixedly connected. After the OLIF cage is implanted into the intervertebral space of the lumbar vertebra in a diagonal direction, the implantation device is closer to the psoas major muscle 30 at this time. Please continue to refer to Figure 2 As shown in the figure, since the cage is also in a diagonal state, it is necessary to rotate the implantation device to correct the OLIF cage. During rotation, the implantation device will squeeze and pull the psoas major muscle, which is potentially harmful to the psoas major muscle.

[0058] In order to solve the problem that the existing cage may squeeze and pull the psoas major muscle during correction, in a first aspect, the embodiment provides a cage:

[0059] Please refer to Figure 3As shown, the fusion device comprises a fusion body 10; the fusion body 10 has an implantation plane 11 and a positioning plane 12; the implantation plane and the positioning plane 12 are arranged at an angle, the implantation plane 11 and the positioning plane 12 are connected; the fusion body 10 is provided with a bone graft window 13 in a first set direction, the bone graft window 13 is through from one end to the other end of the fusion body 10 along the first set direction, the first set direction is parallel to the implantation plane 11 and the positioning plane 12, Figure 3 The first set direction is direction d. The fusion body further comprises a locking groove 14, the locking groove 14 is opened on the fusion body along a second set direction, the locking groove 14 is opened on the implantation plane 11 and the positioning plane 12 at the same time and communicates with the inner cavity of the bone graft window 13, the second set direction is perpendicular to the first set direction, Figure 3 The second set direction is direction e. The bone graft window 13 has a first inner wall 131 and a second inner wall 132, the first inner wall 131 is parallel to the implantation plane 11 and faces the implantation plane 11 in a direction perpendicular to the implantation plane 11, the second inner wall 132 is parallel to the positioning plane 12 and faces the positioning plane 12 in a direction perpendicular to the positioning plane 12.

[0060] The traditional implantation operation of the fusion device is from the posterior approach, and the OLIF is also called the oblique anterior approach lumbar interbody fusion. The operation belongs to a minimally invasive operation and does not need to cut the psoas major muscle. The implantation direction of the OLIF operation is obliquely implanted from the front and lateral side of the waist, so the implantation direction of the OLIF operation is generally known and determined, and the implantation direction in the embodiment is known and determined, which is consistent with the implantation direction of the existing OLIF operation. Please refer to Figure 12 As shown, direction a is the implantation direction, which is obliquely implanted from the front and lateral side of the waist;

[0061] Based on the above-mentioned fusion device, the embodiment also needs a matching implantation device, so in the second aspect, the embodiment provides a rotatable OLIF implantation device.

[0062] The implantation device comprises a sleeve 21 and an implantation rod 22;

[0063] The implantation rod 22 comprises a rod body 221 and a locking body 222, the locking body 222 is connected to the distal end of the rod body 221, the outer contour of the locking body 222 has a maximum size in a first radial direction and a minimum size in a second radial direction; the maximum size is greater than the minimum size and greater than the outer diameter of the rod body 221, the rod body 221 is movably arranged in the sleeve 21 from the distal end of the sleeve 21, and the locking body 222 is located outside the distal end of the sleeve 21, and the implantation rod 22 is configured to:

[0064] The implant rod 22 can rotate in the sleeve 21 to adjust the angle of the first direction relative to a reference plane, the reference plane passing through the rotation central axis of the implant rod 22, the locking body 222 has a locking state, when the locking body 222 is in the locking state: the first direction is at a first angle relative to the reference plane, the implant rod 22 moves in the sleeve 21 along the axial direction, so that the locking body 222 is close to the distal end of the sleeve 21 to clamp the fusion body; and the corresponding locking body 222 is away from the distal end of the sleeve 21 to release the fusion body.

[0065] The rotation of the implant rod in the sleeve refers to the rotation of the implant rod around its own axis, and the reference plane can be Figure 4 a plane passing through the rotation central axis of the implant rod 22 and parallel to a side wall of the fusion body; the locking body 222 has a maximum size and a minimum size, which actually defines the outer contour of the locking body 222 has a length direction and a width direction, the length direction is the first direction, and the width direction is the second direction; for example Figure 4 and Figure 5 For example Figure 7 and Figure 8 , the locking body 222 is a cylindrical rod, the first direction is actually the axial direction of the locking body 222 when the implant rod 22 is sleeved in the sleeve 21, and the second direction is actually the radial direction of the sleeve 21 and also the radial direction of the locking body 222;

[0066] The cross-sectional shape of the sleeve 21 and the implant rod 22 is not limited, and in the embodiment, the sleeve 21 and the implant rod 22 are both cylindrical structures, and the inner cavity of the sleeve 21 is a cylindrical cavity;

[0067] Please refer to Figures 3 to 5 , the rod body 221 is inserted from the distal end of the sleeve 21 and passes out from the proximal end of the sleeve 21, and in the actual operation process, the distal end of the rod body 221 and the distal end of the sleeve 21 are implanted into the patient's body, and the proximal end of the rod body 221 and the proximal end of the sleeve 21 are located outside the patient's body, so that the rotation or axial movement of the rod body 221 in the sleeve 21 can be controlled;

[0068] Since the locking body 222 needs to pass through the locking groove 14, the maximum size of the locking body 222 should be greater than the height size of the locking groove in the direction d, and the minimum size of the locking body 222 should be less than the height size of the locking groove in the direction d, and the outer diameter of the distal end of the sleeve 21 is greater than the height size of the locking groove in the direction d; for example Figure 4As shown, when the implant and the fusion body need to be engaged or disengaged, the rod 221 needs to be rotated first, so that the first direction of the locking body 222, that is, the length direction of the locking body 222, is parallel to the locking groove 14. At this time, the locking body is in the unlocked state, and the second direction coincides with direction d. At this time, the locking body 222 can be passed through the locking groove 14 and enter the bone graft window 13, or the locking body 222 can be taken out from the bone graft window 13 through the locking groove 14. The locking body 222 is as follows: Figure 4 After entering the bone graft window 13, then as follows Figure 5 Rotating rod 221 so that its first direction, i.e., the length direction of locking body 222, coincides with the d-direction, the locking body is in a locked state. At this time, the maximum dimension of locking body 222 is greater than the height dimension of the locking groove, so locking body 222 cannot pass through the locking groove. Axial movement of rod 221 reduces the distance between locking body 222 and the distal end of sleeve 21, causing locking body 222 to abut against the second inner wall 132, and the distal end of sleeve 21 to abut against the implantation plane 11. Figure 5 As shown, the locking body 222 and the distal end of the sleeve 21 are clamped between the second inner wall 132 and the implantation plane 11, thus fixing the implanter and the fusion device together. Since the implanter is perpendicular to the implantation plane 11 at this time, it is as follows: Figure 12 As shown, the fusion device is implanted into the lumbar intervertebral space along the implantation direction using an implanter; after implantation, the rod 221 is moved axially, increasing the distance between the locking body 222 and the distal end of the sleeve 21, thus unloading the clamping force on the fusion device, and then it can be... Figure 13 Rotate the implanter so that the cannula 21 is perpendicular to the alignment plane 11. Then move the rod 221 axially so that the distance between the locking body 222 and the distal end of the cannula 21 is reduced. The locking body 222 and the distal end of the cannula 21 are clamped between the first inner wall 131 and the alignment plane 11, so that the implanter and the fusion device are re-fixed. At this time, the alignment plane 11 can be pushed by the implanter, or the implanter can be rotated to swing towards the psoas major muscle 30 on the side closer to the implantation direction, thereby driving the fusion device to be aligned.

[0069] Furthermore, in combination Figures 12 to 14 The implantation process is explained, as the implanter needs to be inserted into human tissue. Figure 12 During the implantation process shown, after the distal end of the implanter mates with the implantation plane 11, the implantation end of the implanter is perpendicular to the implantation plane 11, ensuring that the implantation end and the fusion device are aligned in a straight line, which facilitates implantation of the fusion device through a smaller incision; as shown Figure 13During the deflection of the implant shown, the implant deflects from direction a to direction b. The deflection angle is limited by the angle between the implantation plane 11 and the alignment plane 12. After deflection, the implantation end aligns with and is perpendicular to the alignment plane 12. It is important to emphasize that the alignment of the implant with the alignment plane 12 does not directly straighten the fusion body 10. Instead, the implant needs to push the fusion body along a straight line perpendicular to the alignment plane 12 or swing towards the psoas major muscle on the implantation side to drive the corresponding rotation of the fusion body 10, thereby straightening its posture. Figure 14 As shown, when the implant is perpendicular to the alignment plane 12, pushing the fusion device can align the fusion device, or the implant can adaptively swing towards the psoas major muscle 30 on the side closer to the implantation direction to drive the fusion device to rotate, thereby adjusting the posture of the fusion device to align it. After the fusion device is aligned, the implant deflects from direction b to direction c, and finally the implant maintains a certain distance from the psoas major muscle 30, so it will not cause compression or traction to the psoas major muscle 30.

[0070] This implant, used in conjunction with a dedicated fusion device, allows for adjustment of the implant's posture while connected to the fusion device. This adjustment aligns the implant with the implantation plane and the alignment plane of the fusion device, enabling the implant to switch between implantation and alignment states. In the alignment state, the implant moves away from the psoas major muscle on the side furthest from the implantation direction, aligning with the corresponding alignment plane. Before aligning the fusion device, the implant is moved away from the psoas major muscle on that side, providing ample space for movement and preventing compression or traction of the psoas major muscle during alignment. This eliminates the potential harm to the psoas major muscle caused by the implant during the alignment of the fusion device. Moreover, the implant of this structure can drive the locking body 222 to rotate through the cooperation of the rod 221 and the sleeve 21, so that the locking body 222 can switch between the locked state and the unlocked state. In the locked state, the locking body 222 can cooperate with the distal end of the sleeve 21 to form a clamping structure. At the same time, in the unlocked state, the locking body 222 can pass through the locking groove to realize the cooperation or separation of the implant and the fusion device. This facilitates the implantation of the fusion device and, after the implantation is completed, separates the implant from the fusion device, removes the implant from the patient's body, and retains the fusion device in the patient's body.

[0071] Furthermore, the locking body 222 also has an unlocked state. In the unlocked state, the locking body 222 forms a second angle with respect to the reference plane in the first direction, and the implanted rod 22 moves axially within the sleeve 21, allowing the locking body 22 to extend outside the fusion body. Correspondingly, the fusion body can also extend into its interior.

[0072] Please refer toFigure 4 As shown, Figure 4 The state corresponding to the locking body 222 described in the above embodiment is the unlocked state, at this time the first direction is parallel to the locking groove 14, and the second direction is rotated to coincide with the direction d, wherein the relative position relationship between the first direction and the second direction is not limited, and in the embodiment, the first direction and the second direction are preferably perpendicular, so that the length direction and the width direction of the locking body 222 are perpendicular at this time; in the unlocked state, the locking body 222 is parallel to the locking groove and extends into the bone window through the locking groove, or after the implantation operation is completed, the locking body 222 extends out of the fusion cage through the locking groove; based on the setting of the unlocked position, the locking body 222 is separated from the fusion cage, so that the implanted cage is conveniently taken out of the patient's body after the operation is completed.

[0073] Further, the locking body 222 is in a rod structure, and the locking body 222 is perpendicular to the distal end of the rod body 221.

[0074] The cross section of the rod structure is not limited here, which can be a square rod, a circular rod or other shaped rods. When the rod structure is set, the first direction actually corresponds to the length direction of the rod structure, and the second direction is perpendicular to the length direction. Since the rod structure is a slender structure, the difference between the maximum size and the minimum size is large, and when the rod body 221 is in the unlocked state, the rod body 221 is beneficial to pass through the locking groove with a small height, and when the rod body 221 is in the locked state, the rod body 221 is beneficial to be clamped on the inner wall of the bone window without being taken out of the locking groove. Moreover, the locking body 222 is set as a slender rod structure, which is also beneficial to reduce the size of the locking groove.

[0075] Further, the locking body 222 is a cylindrical rod.

[0076] Please refer to Figure 4 and Figure 5 As shown, the locking body 222 is a hollow cylindrical rod, and the middle position of the locking body 222 is connected to the rod body 221 vertically, and as shown in Figure 5 When the locking body 222 is clamped on the first inner wall 131 or the second inner wall 132, the locking body 222 is in a linear contact state with the corresponding inner wall, so that the locking body 222 has almost no special requirements for the size and shape of the first inner wall 131, and therefore the locking requirement of the locking body 222 can be met by setting a smaller size of the first inner wall. Since the size of the fusion body is generally small, it is convenient to set the corresponding first inner wall 131 on the fusion cage with a small size.

[0077] Further, the sleeve 21 comprises a tube body 211 and a head 212, the head is arranged at the distal end of the tube body 211, the distal end of the head 212 has a clamping surface 213, the clamping surface is perpendicular to the axial direction of the sleeve 21, the maximum radial dimension of the clamping surface is greater than the outer diameter of the tube body 211.

[0078] As shown in Figure 4 and Figure 5 , since the head 212 is to be abutted against the implantation plane and the alignment plane, the outer contour size of the head should be greater than the height size of the locking groove in the direction d, the specific shape of the head is not limited here, which can be circular, polygonal or other known forms, the head is arranged for direct cooperation with the implantation plane and the alignment plane, and the clamping surface of the head can be attached to the implantation plane and the alignment plane, which is beneficial to maintaining the stability of the fusion cage; if the distal end of the tube body is directly cooperated with the implantation plane or the alignment plane, the diameter of the tube body is too small, the support area of the fusion cage is too small, and it is difficult to maintain the stability of the fusion cage, and if the diameter of the tube body is too large, it will affect the implantation process, therefore, the head is arranged, and the clamping surface 213 is arranged on the head, which is beneficial to maintaining the stability of the fusion cage, and also beneficial to reducing the diameter of the tube body, facilitating the performance of the implantation surgery.

[0079] Further, the rotatable OLIF implantation device further comprises a locking member 23, which is used to lock the circumferential rotation of the rod body 221 when the locking body 222 is in the locking state.

[0080] As shown in Figures 6 to 11 , it is another embodiment of the rotatable OLIF implantation device, in which a locking member is added, the locking member can be locked in various forms, such as through a pin, a pin shaft or other known mechanical fastening forms, in the locking state as shown in Figure 6 , the rod body 221 is locked and cannot rotate, which is beneficial to maintaining the better stability of the rod body 221 in the locking state, thereby improving the clamping effect.

[0081] Further, the rotatable OLIF implantation device further comprises a locking portion 24, the locking portion 24 is arranged on the sleeve 21, the locking member 23 is arranged in the locking portion 24, the locking member 23 and the rod body 221 are in single degree of freedom sliding cooperation in the axial direction, and the locking member 23 is circumferentially locked in the locking portion 24 when the locking body 222 is in the locking state.

[0082] The meaning of circumferential locking is to limit the relative circumferential rotation, and the locking member 23 is circumferentially locked, so that the locking member 23 is limited to rotate circumferentially relative to the locking portion 24;

[0083] As shown in Figure 6As shown, the locking portion 24 is connected to the proximal end of the rod body 221, and the locking portion 24 is coaxially arranged with the rod body 221, and the locking portion 24 has an inner cavity for mounting the locking member 23, wherein the locking member 23 can be a pin shaft or a pin or other mechanical locking structure, and the locking mode of the locking member 23 is not limited here, and the locking effect of the rod body 221 is achieved by locking the locking member 23, and the locking member 23 is installed in the locking portion 24, and the locking member 23 is circumferentially locked after cooperating with the inner cavity of the locking portion 24, and the structure compactness of the implanting device can be improved.

[0084] Further, the rotatable OLIF implanting device further comprises a positioning protrusion 231 and a positioning groove 232, which are oppositely arranged in the axial direction, the positioning protrusion 231 is arranged on one of the locking portion 24 and the locking member 23, and the positioning groove 232 is arranged on the other one of the locking portion 24 and the locking member 23, and when the locking body 222 is in the locking state, the positioning protrusion 231 is axially inserted into the positioning groove 232, so that the locking member 23 is circumferentially locked.

[0085] Please refer to Figure 6 、 Figure 9 and Figure 11 , wherein the locking portion 24 has an inner cavity coaxially arranged with the sleeve 21, the inner diameter of the cavity of the locking portion 24 is larger than the inner diameter of the sleeve 21, so that the cavity of the locking portion 24 has a third inner wall 242 near the proximal end of the sleeve 21, wherein the positioning protrusion 231 is preferably provided with two and arranged on the third inner wall 242, and the positioning groove 232 is arranged at the axial distal end of the locking member 23, and the shapes of the positioning protrusion 231 and the positioning groove 232 are matched, and the shapes and number of the positioning protrusion 231 and the positioning groove 232 are not limited here, and the positioning protrusion 231 and the positioning groove 232 are preferably cylindrical in the embodiment; combined with Figure 6 , when the locking body 222 is in the locking state, the positioning protrusion 231 is axially inserted into the positioning groove 232, so that the locking member 23 is circumferentially locked, and since the locking member 23 is in single degree of freedom sliding cooperation with the rod body 221 in the axial direction, the rod body 221 is also circumferentially locked synchronously, but the rod body 221 can slide axially at this time; of course, the positioning groove 232 can be arranged on the locking portion 24, and the positioning protrusion 231 is arranged on the locking member 23 at this time, which will not be repeated here;

[0086] Further, the rotatable OLIF implanting device further comprises a potential energy member 233, which is used to provide the locking member 23 with the potential ability to axially slide, so that the positioning protrusion 231 is axially inserted into the positioning groove 232.

[0087] The potential energy piece is a component that can store or release potential energy. The specific structure of the potential energy piece 233 is not particularly limited in the embodiments. For example, in an alternative embodiment, the potential energy piece 233 can include a magnet and an attracting piece that can be attracted by the magnet. The magnet can be arranged in the locking portion 24, and the locking piece 23 can further be entirely formed of a permanent magnet. In another embodiment, the potential energy piece 233 can include a spring arranged in the locking portion 24. The spring is arranged between the proximal end of the locking piece 23 and the inner wall of the locking portion 24. The spring exerts an elastic force on the locking piece 23 to make it slide axially to the distal end side of the locking portion 24. The spring is compressed to store elastic potential energy. Of course, in other embodiments, those skilled in the art can select other structures for the potential energy piece 233 according to the prior art, and the present application is not limited in this regard.

[0088] Further, the locking portion 24 is provided with a locking window 241 to enable the locking piece 23 arranged in the locking portion 24 to communicate with the outside through the locking window 241.

[0089] As shown in Figure 6 and Figure 9 , the locking window 241 is preferably a rectangular window, and the locking portion 24 is a cylindrical structure. The inner cavity of the locking portion 24 is cylindrical. The number and shape of the locking window 241 are not limited here. Preferably, two radially opposite locking windows 241 are provided in a certain radial direction of the locking portion 24. The locking piece 23 is exposed at positions on both sides of the locking window 241, which facilitates hand clamping of the locking piece 23 for control. When it is necessary to adjust the locking body 222 to an unlocked posture, as shown in Figure 6 , the locking piece 23 is clamped and axially pulled to the right, so that the positioning protrusion 231 and the positioning groove 232 are separated. At this time, the locking piece 23 can be rotated to make the locking body 222 assume an unlocked posture. When it is necessary to adjust the locking body 222 to a locked state, the locking piece 23 is rotated to make the locking body 222 assume a locked state. At this time, the locking piece 23 is released, and the potential energy piece 233 drives the locking piece 23 to slide axially to the left, so that the positioning protrusion 231 and the positioning groove 232 are engaged to achieve circumferential locking of the locking piece 23.

[0090] Further, the implant rod 22 further includes an adjusting portion 223 connected to the proximal end of the rod body 221. The locking piece 23 that slides in the axial single degree of freedom is sleeved on the adjusting portion 223.

[0091] As shown in Figure 6As shown, the locking member 23 is in a cylindrical structure, and the outer cylindrical surface of the locking member 23 is axially provided with two holding surfaces 235, and when the positioning protrusion 231 and the positioning groove 232 are matched, the two holding surfaces correspond to the two locking windows 241 respectively, so as to be manually clamped; the locking member 23 is provided with a square assembly hole 234 in the middle, and the adjusting part 223 is a rectangular rod structure matched with the assembly hole, so that when the locking member 23 is sleeved on the adjusting part 223, the two are single-degree-of-freedom sliding fit. Of course, the shapes of the assembly hole and the adjusting part 223 are not limited to square, but can also be rectangular or other polygonal structures, which will not be repeated here. The assembly form of the adjusting part 223 and the locking member 23 is beneficial to improve the assembly compactness of the two, and is also convenient for manually adjusting the locking member 23.

[0092] Further, the rotatable OLIF implant device further comprises a locking member 25, which is arranged on the sleeve 21 and is used to drive the locking body 222 to press the fusion body and axially lock the position of the implant rod 22.

[0093] The locking member 25 can be a hydraulic structure, which applies an axial hydraulic force to the implant rod, so that the locking body 222 is pressed on the first inner wall or the second inner wall; or the locking member 25 can be a nut, which is threadedly connected to the implant rod for axially locking the implant rod, so that the locking body 222 is pressed on the fusion body; the locking body 222 can also adopt other known structures, which will not be repeated here.

[0094] Further, the rotatable OLIF implant device further comprises a locking part 26, which is arranged at the proximal end of the sleeve 21, and the locking member 25 is installed in the locking part 26.

[0095] Please refer to Figure 6 As shown, the proximal end of the locking part 24 is coaxially connected with a transition sleeve 27, the locking part 26 is coaxially fixedly connected to the proximal end of the transition sleeve 27, and the transition sleeve 27 is further externally connected with a handle 28. The locking part 26 has an inner cavity, and the locking member 25 is installed in the locking part 24, which improves the structural compactness of the implant device.

[0096] Further, the implant rod 22 further comprises a locking rod 224, which is coaxially connected with the proximal end of the rod body 221, and the locking member 25 is threadedly driven with the locking rod 224. The locking member 25 is configured such that when the locking member 25 rotates relative to the locking rod 224 in the locking part 26, the axial movement of the locking member 25 relative to the locking rod 224 changes the axial distance between the locking member 25 and the locking body 222.

[0097] The locking rod 224 is coaxially connected to the proximal end of the adjusting part 223 and extends into the inner cavity of the locking part 26 through the transition sleeve 27, the inner diameter of the inner cavity of the locking part 26 is greater than the inner diameter of the transition sleeve 27, and then the abutting surface 262 is formed at the distal end of the inner cavity of the locking part 26, the locking rod 224 has a threaded section, the locking part 25 is in threaded transmission with the threaded section, the locking part 25 is coaxially arranged with the locking rod 224, when the locking part 25 is rotated, the locking part 25 moves axially relative to the locking rod 224, when the locking part 25 is abutted on the abutting surface 262 and continues to be rotated, the locking rod 224 can be pulled to move, and then the locking body 222 is pressed on the first inner wall or the second inner wall, and the position of the implant rod 22 relative to the sleeve 21 is locked.

[0098] Further, the locking window 261 is arranged on the locking part 26, so that the locking part 25 in the locking part 26 is communicated with the outside through the locking window 261.

[0099] Please refer to Figure 9 It is preferred that the locking window 261 is a rectangular window, the locking part 26 is a cylindrical structure, the inner cavity of the locking part 26 is cylindrical, the number and shape of the locking window 261 are not limited here, and it is preferred that two radially opposite locking windows 261 are arranged in a certain radial direction of the locking part 26, so that the locking part 25 is exposed on both sides of the locking window 261, and the locking part 25 is convenient for hand clamping operation.

[0100] Further, the locking part 25 is cylindrical, the locking part 25 is coaxially and threadedly transmitted with the locking rod 224, and the anti-skid protrusions 251 are arranged on the outer circular surface of the locking part 25.

[0101] The locking part 25 is coaxially arranged with the locking rod 224, please refer to Figure 10 The specific formation of the anti-skid protrusions 251 is not limited here, and it is preferred that the anti-skid protrusions are long strips extending along the axial direction, and the anti-skid protrusions 251 are uniformly arranged in the circumferential direction, so as to increase the friction force in the process of hand operation of the locking part 25 and improve the operability.

[0102] The embodiment also provides an implant system, which comprises the above-mentioned rotatable OLIF implant and a fusion cage, and the rotatable OLIF implant is used in cooperation with the fusion cage to implant the fusion cage.

[0103] Only the structure of a fusion cage is proposed in the embodiment, the fusion cage can be used in cooperation with the rotatable OLIF implant, and the structure of the fusion cage is not limited to the above-mentioned structure, and the structure of the fusion cage used in cooperation with the rotatable OLIF implant is not limited in the embodiment, and the specific structure of the fusion cage can be improved according to the adaptability of the structure of the rotatable OLIF implant in other embodiments.

[0104] In addition, the implant system can further include a mechanical arm for controlling the implant device, a scanning module for scanning the implant position of the rotatable OLIF implant device in real time, and a modeling module for modeling the surgical environment and the patient as a reference for the implant position. The specific structure of the implant system is not limited here according to the surgical requirements.

[0105] The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0106] The above description is only a description of the preferred embodiments of the present application, and is not any limitation on the scope of the present application. Any modification or modification made by a person skilled in the art according to the above disclosure is within the protection scope of the claims.

Claims

1. A rotatable OLIF implanter, characterized in that: Includes cannula and implant rod; The implantable rod includes a rod body and a locking body. The locking body is connected to the distal end of the rod body. The outer contour of the locking body has a maximum dimension along a first radial direction and a minimum dimension along a second radial direction. The maximum dimension is greater than the minimum dimension and greater than the outer diameter of the rod body. The rod body is movably inserted into the sheath from the distal end of the sheath, and the locking body is located outside the distal end of the sheath. The implantable rod is configured as follows: The implant rod is rotatable within the cannula to adjust the angle of the first direction relative to the reference plane, the reference plane passing through the rotation axis of the implant rod. The locking body has a locked state. When the locking body is in the locked state: the first direction forms a first angle relative to the reference plane, and the implant rod moves axially within the cannula, causing the locking body to approach the distal end of the cannula to clamp the fusion body. The locking body has a rod-shaped structure, and the locking body is perpendicular to the distal end of the rod; The sleeve includes a tube body and a head. The head is disposed at the distal end of the tube body. The distal end of the head has a clamping surface. The clamping surface is perpendicular to the axial direction of the sleeve. The maximum radial dimension of the clamping surface is greater than the outer diameter of the tube body. The locking body also has an unlocked state. In the unlocked state, the first direction is at a second angle relative to the reference plane, and the implant rod moves axially within the sleeve, allowing the locking body to extend to the outside of the fusion body.

2. The rotatable OLIF implant as described in claim 1, characterized in that: The rotatable OLIF implant also includes a locking element for locking the circumferential rotation of the rod body when the locking body is in the locked state.

3. The rotatable OLIF implant as described in claim 2, characterized in that: The rotatable OLIF implant also includes a locking part, which is disposed on the cannula. The locking member is disposed in the locking part and slides with the rod body in a single degree of freedom along the axial direction. When the locking body is in the locked state, the locking member is circumferentially locked in the locking part.

4. The rotatable OLIF implant as described in claim 3, characterized in that: The rotatable OLIF implant also includes a positioning protrusion and a positioning groove, the positioning protrusion and the positioning groove being arranged opposite to each other in the axial direction, the positioning protrusion being disposed on one of the locking part and the locking member, and the positioning groove being disposed on the other of the locking part and the locking member. When the locking body is in the locked state, the positioning protrusion is axially inserted into the positioning groove.

5. The rotatable OLIF implant as described in claim 4, characterized in that: The rotatable OLIF implant also includes a potential energy element for providing the locking element with the potential to slide axially, so that the positioning protrusion is axially inserted into the positioning groove.

6. The rotatable OLIF implant as described in claim 3, characterized in that: The locking part has a locking window so that the locking element located inside the locking part can communicate with the outside through the locking window.

7. The rotatable OLIF implant as described in claim 6, characterized in that: The implant rod also includes an adjustment part, which is connected to the proximal end of the rod body, and the locking member slides along the axial direction with a single degree of freedom on the adjustment part.

8. The rotatable OLIF implant as described in claim 1, characterized in that: The rotatable OLIF implant also includes a locking element disposed on the cannula, which is used to drive the locking body to press against the fusion body and axially lock the position of the implant rod.

9. The rotatable OLIF implant as described in claim 8, characterized in that: The rotatable OLIF implanter also includes a locking part, which is located at the proximal end of the cannula, and the locking element is installed inside the locking part.

10. The rotatable OLIF implant as described in claim 9, characterized in that: The implant rod also includes a locking rod, which is coaxially connected to the proximal end of the rod body. The locking member is threadedly engaged with the locking rod. The locking member is configured such that when the locking member rotates relative to the locking rod within the locking part, the axial movement of the locking member relative to the locking rod causes a change in the axial distance between the locking member and the locking body.

11. The rotatable OLIF implant as claimed in claim 10, characterized in that: The locking part is provided with a locking window so that the locking member located in the locking part can communicate with the outside through the locking window.

12. The rotatable OLIF implant as described in claim 10, characterized in that: The locking element is cylindrical and is coaxially threaded with the locking rod. Anti-slip protrusions are provided on the outer surface of the locking element.

13. An implantation system, characterized in that: The implantation system includes a rotatable OLIF implanter as described in any one of claims 1 to 12 and a fusion body, the rotatable OLIF implanter being used to cooperate with the fusion body to implant and align the fusion body.

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