TWI832636B - Surgical tool for implant - Google Patents

Abstract

A surgical tool for holding implant includes an inner rod and a sleeve, the inner rod includes a rod portion and a holding portion, the holding portion is located at an end of the rod portion and has a first accommodation space configured for accommodating a part of the implant, the sleeve includes a sleeving portion and a retaining portion, the sleeving portion is slidably sleeved on the rod portion of the inner rod, the retaining portion is located at an end of the sleeving portion and selectively presses against the holding portion, the inner rod further includes at least one fin portion protruding from the holding portion and located in the first accommodation space and configured to be inserted into at least one slot of the implant.

Description

Implant surgical instruments

The present application relates to a surgical instrument, in particular to an implant surgical instrument.

Defects and injuries to the spine may be caused by congenital defects, tumors or other diseases, aging or trauma. The usual treatment is to remove the damaged or tumorous vertebra and perform reconstructive surgery. During the surgery, the doctor will use pedicle screws and spine fixation rods to align the spine and remove the damaged vertebrae, and then place implants into the space after the removed vertebrae to reconstruct them. .

In order to adapt to the movements required by the vertebrae during human activities, some vertebral implants can be made flexible through material selection or structural modeling design. This also helps to avoid contact between the vertebrae when the intervertebral pressure is too high. Problems such as slippage may occur due to stress concentration or relative movement between the vertebrae.

However, existing surgical instruments for inserting implants into the space behind the removal of vertebrae, when used with flexible vertebral implants, may not be able to effectively position the implant and may easily cause the implant to be inserted into the space during the process. Unexpected movement or deformation may occur, thereby increasing the difficulty of installing the implant. If the implant is not installed and positioned or is installed in a manner that exhibits unexpected deformation, it may easily lead to subsequent fusion failure.

According to an embodiment of the present application, a surgical instrument is disclosed, which is suitable for holding an implant and includes an inner rod and an outer sleeve. The inner rod includes a rod part and a gripping part. The gripping part is located at one end of the rod part and has a first accommodation space. The first accommodation space is suitable for accommodating the local body. Department of implants. The outer set includes an outer sleeve part and a resisting part. The outer sleeve part is slidably sleeved outside the rod part of the inner rod member. The resisting part is located at one end of the outer sleeve part to selectively resist the gripping part. The inner rod further includes at least one stop piece, which protrudes from the grasping portion and is located in the first accommodation space, and is suitable for inserting into at least one groove of the implant.

1:Surgical instruments

10:Inner rod

11: Rod

111: First positioning surface

12: Grip part

120: Resistance side

121: Contact surface

122:Elastic arm structure

123:stop piece

S1: the first accommodation space

20: Outer kit

21:Coat Department

211:Screw hole

22: Resistance Department

221: Resistance side

222:End

P: moving path

S2: Second accommodation space

23:Threading hole

231:Inner tube wall

2311: Second positioning surface

H0, H1, H2: height

30: handle

40: Positioning parts

7:Screw

8: Vertebrae

9: Implants

90: Flexible body

901:Trench

93: Locking part

1’:Surgical instruments

10’: Inner rod

12’: Grip part

120’: Resistance side

121’: contact surface

122’:Elastic arm structure

123’:stop piece

S1’: the first accommodation space

20’: Outer kit

22’: Resistance Department

221’: Resistance side

S2’: Second accommodation space

9’:Implant

90’: Flexible body

901’:Trench

The following description should be read in conjunction with the corresponding figures to help understand various implementation aspects of the present application. It should be noted that the various features illustrated may not be drawn to scale. In fact, the size and proportion of the various features illustrated may be arbitrarily adjusted and scaled for ease of understanding and explanation.

FIG. 1 is a schematic diagram of a surgical instrument and an implant suitable for the surgical instrument according to an embodiment of the present application.

FIG. 2 is a partial perspective view of the inner rod of the surgical instrument in FIG. 1 .

FIG. 3 is a partial perspective view of the outer sleeve of the surgical instrument in FIG. 1 .

FIG. 4 is a partial enlarged top view of the surgical instrument in FIG. 1 .

Figures 5 to 11 are schematic diagrams illustrating the operation flow of installing the implant with the surgical instrument in Figure 1 .

Figure 12 is a schematic diagram illustrating a surgical instrument and an implant suitable therefor according to another embodiment of the present application.

A detailed description is provided below in conjunction with one or more embodiments shown in the accompanying drawings, so that those with ordinary knowledge in the art can thoroughly understand the present application and implement it accordingly. However, it should be understood that the following description is not intended to limit the present application to certain specific embodiments. On the contrary, the intention is to cover alternatives, modifications, and equivalents within the spirit and scope of the various embodiments as defined by the claimed scope.

Terms such as "substantially", "approximately" and "substantially" may be used below to describe the reasonable or acceptable amount of deviation that may exist from the modified situation or event, but still The expected results can be achieved. "At least one" may also be used below to describe the quantity of the thing being described, but unless otherwise expressly stated, it shall not be limited to the case where the quantity is "only one". The term "and/or" may also be used below, which should be understood to include any one and all combinations of one or more of the listed items. The following may also use terms such as "connecting", "setting up", "fixing" and "assembling" regarding the relative positional relationship of multiple described objects. However, unless otherwise explicitly stated, they should not be limited to direct descriptions of the described objects. While "connecting", "arrangement", "fixing" or "assembling" to another described object without an intermediary, it can be understood that one or more intermediate media may be included between the described objects.

The present application provides a surgical instrument for an implant, which can effectively position the implant during the installation of the implant, thereby solving the related problems caused by the aforementioned traditional surgical instruments.

This application presents some exemplary embodiments of surgical instruments for implants. Generally speaking, please refer to FIG. 1 . An exemplary embodiment of the present application provides a surgical instrument 1 , which is suitable for operation by a physician to facilitate the installation of an implant 9 into the space between vertebrae 8 . The implant 9 may be, but is not limited to, a vertebra reconstruction implant. As shown in FIG. 1 , the implant 9 is suitable for implantation into the vertebral body after removing a certain vertebra 8 . The space is suitable for being inserted between the vertebrae 8 to replace and reconstruct the removed vertebrae. The vertebrae 8 shown here may be, but are not limited to, the cervical vertebrae used to illustrate the human body, but the application is not limited thereto.

Looking further, the implant 9 may include a flexible body 90. The flexible body 90 refers to the main structure in the implant 9 used to support between the vertebrae 8. The flexible body 90 may have a Or a plurality of grooves 901. The grooves 901 can, for example, be disposed on the outer surface of the flexible body 90 and be spaced apart from each other, thereby allowing the flexible body 90 to operate when the flexible body 90 is subjected to a certain degree of external force. A gap that produces bending deformation, or the groove 901 can also be a spiral groove formed on the outer surface of the flexible body 90, so that the flexible body 90 becomes a spiral structure and has a flexibility similar to a compression spring. Song characteristics. In addition, optionally, the implant 9 may also include at least one locking part 93 , and the locking part 93 may protrude from the flexible body 90 for use when the flexible body 90 is installed between the vertebrae 8 . Against the vertebra 8, the physician can reuse screws (such as screws 7 shown in subsequent Figure 10) to penetrate the locking portion 93 And the installed implant 9 is reliably fixed by locking into the vertebra 8 . However, it should be stated in advance that the implant is only used to facilitate understanding of the surgical instrument 1. This application is not limited to the implant, its material, size, groove shape, configuration or depth, and application. .

Below, please continue with Figure 1 and further refer to Figures 2 to 4 to describe the details of the surgical instrument 1. In this embodiment, the surgical instrument 1 is suitable for holding the implant 9, and may include an inner rod 10 and 20 for an outer kit. The inner rod 10 is a member of the surgical instrument 1 adapted to push against the implant 9 to force the implant 9 to fit into the space between the vertebrae 8 . The outer sleeve 20 is slidably sleeved outside the inner rod 10 . The outer sleeve 20 is a component of the surgical instrument 1 that is adapted to enable the inner rod 10 to press against the implant 9 more firmly.

In this embodiment, the inner rod 10 may include a rod portion 11 and a gripping portion 12 . The rod portion 11 is a portion of the inner rod member 10 that extends in one direction and is generally rod-shaped. Alternatively, the rod portion 11 of the inner rod 10 may not be in the shape of a circular rod. In other words, the cross section of the rod portion 11 of the inner rod 10 may be non-circular. For example, in this embodiment, the rod portion 11 of the inner rod 10 may have a first positioning surface 111, and the first positioning surface 111 is a flat surface. Furthermore, the first positioning surface 111 may be, for example, a flat surface extending from one end of the rod part 11 to the other end. However, as long as the rod part of the inner rod is non-circular rod-shaped, the rod part of the inner rod may not be in the shape of a round rod as shown in the figure. The configuration shown is limited. For example, in other embodiments, the cross section of the rod portion of the inner rod may also be a triangle, a quadrangle, or other polygonal or irregular shapes.

The gripping portion 12 is located at one end of the rod portion 11 . For example, the gripping portion 12 can be integrally formed on one end of the rod portion 11 , but the application is not limited thereto; for example, in other embodiments, the gripping portion 12 can also use screw locks, snaps, or adhesives. It is assembled on one end of the rod part 11 in other ways. Furthermore, the gripping portion 12 has a portion that can match the appearance contour of the flexible body 90 of the implant 9 . For example, the gripping portion 12 can be slightly C-shaped and can define a first receiving space S1 around it, whereby the gripping portion 12 can fit into the substantially cylindrical flexible body 90 of the implant 9 , when the gripping part 12 is attached to the flexible body 90 of the implant 9, the gripping part 12 can bear or press against at least a partial outline of the flexible body 90, and make the local flexible body 90 is accommodated in the first accommodation space S1 of the gripping part 12 .

The gripping portion 12 may include a receiving surface 120 and a contacting surface 121 . Resistance surface 120 Refers to the surface of the gripping part 12 that is suitable for directly receiving pressure or pressure from the outer sleeve 20 , and the contact surface 121 refers to the surface of the gripping part 12 that is suitable for directly resisting or applying pressure to the implant 9 The surface of the flexible body 90 . The aforementioned first accommodation space S1 is defined by the contact surface 121 .

In addition, in the inner rod 10 , the entirety of the inner rod 10 or at least part of the gripping portion 12 is made of an elastically deformable material. Therefore, when an external force is applied to the gripping portion 12 , the gripping portion 12 is deformed. 12 can elastically deform in response to the external force, and the first accommodation space S1 defined around the gripping portion 12 can also shrink in response to the external force. For example, in this embodiment, the gripping part 12 may also include a plurality of elastic arm structures 122. As shown in the figure, the elastic arm structures 122 are spaced apart from each other and are arranged on opposite sides of the gripping part 12. These elastic arm structures 122 refer to the portion of the gripping portion 12 that is suitable for elastic deformation under the influence of the aforementioned external force.

In addition, the inner rod 10 may further include at least one stopper piece 123 , and the stopper piece 123 is protrudingly provided on the gripping portion 12 . For example, the stopper piece 123 can protrude from the contact surface 121 of the gripping portion 12 and be located in the first accommodation space S1. More specifically, the stopper pieces 123 are respectively protruding from the contact surfaces 121 on the elastic arm structure 122 and are located in the first accommodation space S1. Therefore, when the elastic arm structure 122 is elastically deformed due to the influence of external force, the elastic arm The structure 122 can move the stop piece 123 accordingly. It should be added here that the stopper pieces 123 have a number, thickness, length, shape and distribution corresponding to the grooves 901 inserted into the implant 9, but the application is not limited thereto; for example, in other embodiments, Depending on the number of grooves on the implant to be installed, the gripping portion of the inner rod may be protruded with only one stop piece or with a greater number of stop pieces. In this embodiment, the stopper piece 123 is designed to correspond to the position of the groove 901 of the implant 9. When the elastic arm structure 122 is elastically deformed due to the influence of external force, each stopper piece 123 will be displaced due to force and snap into the corresponding position. The groove 901 allows the implant 9 to be more firmly fitted and fixed to the gripping portion 12 .

In this embodiment, the outer sleeve 20 may include an outer sleeve 21 and a resisting portion 22 . The outer cover portion 21 is a portion of the outer cover 20 that extends in one direction and is generally rod-shaped. The outer sleeve 21 is slidably sleeved outside the rod portion 11 of the inner rod 10 . The resisting portion 22 is located at one end of the outer shell portion 21 . For example, the resisting portion 22 can be located at an end of the outer shell portion 21 relatively close to the gripping portion 12 of the inner rod 10 . The resisting part 22 can be integrally formed on one end of the outer shell part 21, but the application is not limited thereto; for example, In other embodiments, the resisting portion 22 can also be assembled on one end of the outer cover portion 21 using methods such as screw locking, snapping, and adhesive.

The resisting portion 22 has an appearance profile that can match the gripping portion 12 of the inner rod 10 and can selectively directly abut against the gripping portion 12 of the inner rod 10 . For example, the resisting portion 22 has an appearance contour that can match the resisting surface 120 of the gripping portion 12 of the inner rod 10 and can define a second accommodation space S2 around it, whereby the resisting portion 22 can match The slightly C-shaped gripping portion 12 of the inner rod 10 can bear or be pressed against when the resisting portion 22 is in contact with the resisting surface 120 of the gripping portion 12 of the inner rod 10 . At least a partial outline of the resisting surface 120 of the gripping part 12 allows the partial gripping part 12 to be accommodated in its second accommodation space S2.

The resisting portion 22 may include a resisting surface 221 . The resisting surface 221 refers to the resisting surface 120 on the resisting portion 22 that can selectively directly resist or press against the gripping portion 12 of the inner rod 10 . The aforementioned second accommodation space S2 is defined by the resisting surface 221 . In some applications where the flexible body 90 of the implant 9 is slightly cylindrical, the radius of curvature of the resisting surface 221 of the resisting portion 22 of the outer sleeve 20 can be smaller than the resisting radius of the gripping portion 12 of the inner rod 10 The radius of curvature of surface 120. The resisting portion 22 of the outer sleeve 20 can also have two opposite ends 222 , and the elastic arm structure 122 is located on the moving path P of the two opposite ends 222 of the resisting portion 22 of the outer sleeve 20 , thereby ensuring that the outer sleeve 20 The resisting portion 22 moves in the direction of the gripping portion 12 of the inner rod 10, and can push against the elastic arm structure 122 of the gripping portion 12, so that the outer set 20 can elastically deform the gripping portion 12 to reduce the first volume. The effect of setting space S1.

The outer sleeve 20 can be a hollow structure. Specifically, the outer sleeve 20 can also include an inner tube wall 231 . The inner tube wall 231 can define a through hole 23 around it. The through hole 23 penetrates the outer cover 21 and the resisting portion. 22, and has a shape matching the rod portion 11 of the inner rod 10. Thereby, the rod portion 11 of the inner rod 10 can be disposed in the outer sleeve portion 21 and the resisting portion 22 of the outer sleeve 20 by passing through the through hole 23 . In this configuration, the outer shell portion 21 is slidably sleeved outside the rod portion 11 of the inner rod 10 , and the resisting portion 22 can be relatively close to or away from the gripping portion 12 of the inner rod 10 .

In addition, optionally, the through hole 23 of the outer set 20 may not be cylindrical. In other words, the cross section of the through hole 23 of the outer set 20 may not be circular. For example, in this embodiment, around The inner tube wall 231 surrounding the through hole 23 has a second positioning surface 2311, and the second positioning surface 2311 is a flat surface. Furthermore, the second positioning surface 2311 is, for example, a flat surface extending from one end of the through hole 23 to the other end. When the rod portion 11 of the inner rod 10 is inserted into the through hole 23 of the outer set 20, the second positioning surface 2311 of the through hole 23 of the outer set 20 can correspond to or lightly touch the rod portion 11 of the inner rod 10. The first positioning surface 111, in this configuration, because there is a plane corresponding to the plane between the rod portion 11 of the inner rod 10 and the through hole 23 of the outer sleeve 20 (that is, the first positioning surface 111 corresponds to the second positioning surface 2311), so the outer sleeve 20 can only linearly slide relative to the extension direction of the rod portion 11 of the inner rod 10 and cannot rotate around the rod portion 11; in other words, when the outer sleeve 20 is sleeved on the inner rod 10 When outside, the inner rod 10 and the outer sleeve 20 can only slide axially relative to each other but cannot rotate relative to each other, which helps to improve the stability and convenience of subsequent operations. In addition, similarly, as long as the through-holes of the outer set can match the external shape of the rod portion of the inner rod, the through-holes of the outer set are not limited to the configuration shown in the figures. For example, in other embodiments, the through-holes of the outer set are The cross section of the through hole may also be a triangle, a quadrangle, or other polygonal or irregular shapes.

Optionally, the surgical instrument 1 may also include a handle 30 . The handle 30 is connected to the other end of the rod portion 11 of the inner rod 10 . Specifically, the handle 30 and the gripping portion 12 of the inner rod 10 are respectively located at opposite ends of the rod portion 11 of the inner rod 10 . The handle 30 is a part of the surgical instrument 1 that is used by the user to hold and receive impact or pressure when using the surgical instrument 1 or when the implant 9 is installed. The outer sleeve 20 is movably located between the handle 30 and the gripping portion 12 of the inner rod 10 .

Optionally, the surgical instrument 1 may further include a positioning member 40. Correspondingly, the outer sleeve 21 of the outer sleeve 20 may have a screw hole 211. The screw hole 211 may penetrate the outer sleeve 21 of the outer sleeve 20 and communicate with the outer sleeve. 20 and 23 holes. Thereby, when the positioning member 40 is inserted through the screw hole 211 of the outer sleeve 20, it can selectively abut the rod portion 11 of the inner rod 10 located in the penetration hole 23 of the outer sleeve 20, thereby increasing the number of the outer sleeve 20. The resistance of the outer sleeve 21 to sliding relative to the rod portion 11 of the inner rod 10 stabilizes or fixes the relative positional relationship between the outer sleeve 21 of the outer sleeve 20 and the rod portion 11 of the inner rod 10 . That is to say, when the positioning member 40 passes through the outer shell 21 and is pressed against the rod 11 located in the outer shell 21 , the outer shell 21 can be stably sleeved outside the rod 11 and not easily slide relative to the rod 11 .

Next, please continue to refer to Figures 5 to 11 to introduce how to install the implant 9 by operating the surgical instrument 1. First, referring to Figures 1 and 5-6, the gripping portion 12 of the inner rod 10 can be pressed against the flexible main body 90 of the implant 9 in the direction indicated by the arrow, and the elastic portion protruding from the gripping portion 12 The stop pieces 123 of the arm structure 122 can be respectively inserted into the grooves 901 of the flexible body 90. At that time, the surgical instrument 1 can match and stop the contour of the flexible body 90 of the implant 9 through the gripping portion 12. The blocking piece 123 is inserted into the groove 901 of the flexible body 90 to grasp the implant 9 while maintaining the current shape of the flexible body 90 of the implant 9 .

Then, referring to Figures 6 to 7, the user can slide the outer set 20 in the direction of the gripping portion 12 of the inner rod 10, so that the resisting portion 22 of the outer set 20 can press against the gripping portion 12 of the inner rod 10. The spring arm structure 122. As mentioned above, since the curvature radius of the resisting surface 221 of the resisting portion 22 of the outer sleeve 20 is smaller than the curvature radius of the resisting surface 120 of the gripping portion 12 of the inner rod 10, the elastic arm structure 122 of the inner rod 10 Elastic deformation can occur due to the pressure from the resisting portion 22 of the outer sleeve 20 , thereby reducing the first receiving space S1 of the grasping portion 12 and allowing the stopper piece 123 on the elastic arm structure 122 to penetrate deeper into the implant. 9. The interior of the flexible body 90. In this way, the surgical instrument 1 can exert pressure on the grasping portion 12 through the resisting portion 22, further strengthening the gripping force of the surgical instrument 1 on the implant 9 and maintaining the flexible main body of the implant 9. 90% shape stability.

In one embodiment, in order to ensure the gripping force of the surgical instrument 1 on the implant 9 , the gripping range of the gripping part 12 may be further designed. Specifically, the grasping portion 12 grasps and fixes the implant 9 through the elastic arm structure 122 and the contact surface 121. Therefore, the elastic arm structure 122 and the contact surface 121 cover the overall structure of the implant 9. The degree will affect the gripping force of the surgical instrument 1 on the implant 9 . In one embodiment, the grasping range of the elastic arm structure 122 and the contact surface 121 of the grasping part 12 on the implant 9 can be designed (that is, the elastic arm structure 122 and the contact surface 121 of the implant 9 are in contact with each other). part) is approximately an angular range of 60 degrees to 180 degrees from one center of the implant 9 to the cross-sectional circumference, but is not limited to those listed.

Then, as shown in FIGS. 8 to 9 , the user can, for example, first rotate the positioning member 40 so that the positioning member 40 passes through the outer sleeve 20 and abuts against the rod portion 11 of the inner rod 10 , thereby preventing the outer sleeve 20 from being damaged during subsequent procedures. There is a problem of relative sliding with the inner rod 10 . Then, the user can use the surgical instrument 1 to remove the implant 9 into the space between the vertebrae 8, and use a suitable tool to strike the handle 30. Since the handle 30 is connected to the shaft 11 of the inner rod 10, the force of impact or pressure on the handle 30 can be directly transmitted through the handle 30 The inner rod 10 is passed to the implant 9 so that the implant 9 can be driven into the space between the vertebrae 8 .

H1

H0；H2

H1。 What is supplemented here is that in the process of tapping the implant 9 with the surgical instrument 1, the inner rod 10 can push the implant 9 evenly without causing the flexible body 90 of the implant 9 to Unexpected deformation, and the outer sleeve 20 allows the grasping portion 12 of the inner rod 10 to stably grasp the flexible body 90 of the implant 9, and the connection between the grasping portion 12 of the inner rod 10 and the outer sleeve 20 The size of the resisting portion 22 can be designed taking into account the flexible body 90 of the implant 9 . As shown in Figure 9, the flexible body 90 of the implant 9 can have a height H0, the gripping portion 12 of the inner rod 10 can have a height H1, and the resisting portion 22 of the outer sleeve 20 can have a height H2. The following conditions can be met: (3/4)×H0

H1

H0;H2

H1.

Then, as shown in Figures 10-11, the user can lock the screw 7 into the vertebrae 8 through the locking portion 93 of the implant 9, thereby firmly fixing the implant 9 between the vertebrae 8. The screw 7 described here may be, but is not limited to, a pedicle screw commonly used in vertebral reconstruction and implantation surgeries. After the locking of the implant 9 is completed, the positioning member 40 can be rotated to release the pressure of the positioning member 40 on the rod portion 11 of the inner rod 10 . Afterwards, the outer sleeve 20 is moved in the direction indicated by the arrow to release the resistance and pressure of the resisting portion 22 of the outer sleeve 20 on the grasping portion 12 of the inner rod 10 . Finally, as shown in FIG. 11 , after the user moves the surgical instrument 1 away from the flexible body 90 of the implant 9 , the operation of implanting the implant 9 between the vertebrae 8 is completed.

The aforementioned surgical instruments are only exemplary embodiments of the present application and are not intended to limit the present application. It is understandable that based on the different locations to be implanted, the configuration of the implant can be adjusted accordingly, and in order to be suitable for After the implant is installed, the surgical instrument of the present application can of course be adjusted accordingly. For example, please refer to Figure 12. Another embodiment of the present application provides a surgical instrument 1' suitable for another type of intervertebral space. As shown in Figure 12, the surgical instrument 1' is suitable for holding an implant 9 ', the appearance outline of the implant 9' can be seen. The implant 9' can be a vertebra reconstruction implant suitable for lumbar vertebrae. In this case, the grasping rod 10' within the surgical instrument 1' The contact surface 121' of the holding portion 12', the first accommodation space S1' defined around the contact surface 121', and the elastic arm of the gripping portion 12' The configuration of the structures 122' can all have a profile corresponding to one side of the flexible body 90' of the implant 9', and the stop piece 123' on the elastic arm structure 122' can have a shape corresponding to The distribution and size specifications of the grooves 901' of the flexible body 90'. Correspondingly, the outer sleeve 20', which is suitable for resisting and deforming the gripping portion 12', has the resisting surface 221' of the resisting portion 22' and the second accommodation space S2' defined around the resisting surface 221'. It has a contour corresponding to the resisting surface 120' of the gripping portion 12'. Similarly, the surgical instrument 1' can be operated as shown in Figures 5 to 10 to install the implant 9', so the details will not be described again.

Finally, it should be added that the shape or thickness, length, width, height and other dimensions of the surgical instrument and its parts of this application can be based on any size and specification as long as it can be adapted to the appearance size and design of the implant to be installed. Modifications and adjustments can be made according to other actual needs, and this application is not limited to this.

According to the surgical instrument of the implant disclosed in the foregoing embodiments of the present application, since the stopper on the gripping part of the inner rod can be inserted into the groove of the implant accordingly, the surgical instrument can pass through the third part of the gripping part. A receiving space accommodates the implant and the stopper piece is inserted into the groove, grasps the implant while maintaining the current shape of the implant, and slides outside the outer sleeve of the inner rod. , the resisting part can resist and elastically deform the grasping part of the inner rod, so the surgical instrument can pressurize the grasping part through the resisting part, further strengthening the grasping force of the surgical instrument on the implant. It also allows the stopper piece on the gripping part to penetrate deeper into the groove of the implant, thereby improving the stability of the implant's shape. In this way, the surgical instrument of the present application can avoid unexpected displacement or deformation of the implant during the installation process, thereby greatly reducing the difficulty of installing the implant and helping to reduce the risk of improper installation of the implant. And the probability of subsequent fusion failure.

Although the present application is disclosed in the foregoing embodiments, they are not intended to limit the present application. Any changes and modifications made without departing from the spirit and scope of this application shall fall within the scope of patent protection of this application. Regarding the protection scope defined in this application, please refer to the attached patent application scope.

1:Surgical instruments

10:Inner rod

11: Rod

12: Grip part

123:stop piece

S1: the first accommodation space

20: Outer kit

21:Coat Department

211:Screw hole

22: Resistance Ministry

S2: Second accommodation space

30: handle

40: Positioning parts

8: Vertebrae

9: Implants

90: Flexible body

901:Trench

93: Locking part

Claims (10)

A surgical instrument suitable for holding an implant, including: an inner rod, including a rod part and a gripping part, wherein the gripping part is located at one end of the rod part and has a first accommodation space, the The first accommodation space is suitable for accommodating part of the implant; and an outer sleeve includes an outer sleeve and a resisting portion, wherein the outer sleeve is slidably sleeved on the rod portion of the inner rod. In addition, the resisting portion is located at one end of the outer shell portion to selectively resist the gripping portion; wherein the inner rod further includes at least one stopper piece, and the at least one stopper piece protrudes from the gripping portion. and is located in the first accommodation space and is suitable for inserting into at least one groove of the implant; wherein the resisting portion of the outer sleeve has a resisting surface, and the gripping portion of the inner rod has a receiving surface. The resisting surface selectively directly abuts the resisting surface, and the curvature radius of the resisting surface is smaller than the curvature radius of the resisting surface. The surgical instrument according to claim 1, wherein the gripping portion of the inner rod includes a plurality of elastic arm structures, the elastic arm structures are spaced apart from each other and are arranged on opposite sides of the gripping portion. The surgical instrument according to claim 2, wherein the at least one stop piece protrudes from at least one of the elastic arm structures. The surgical instrument as claimed in claim 2, wherein the elastic arm structures are located on the moving path of opposite ends of the resisting portion of the outer sleeve. The surgical instrument as claimed in claim 1, further comprising a handle connected to the other end of the rod portion of the inner rod, and the outer set is movably located between the handle and the gripping portion of the inner rod. . The surgical instrument according to claim 1 further includes a positioning member, the outer cover of the outer sleeve has a screw hole, and the screw hole penetrates the outer cover. When the positioning member passes through the screw hole, the positioning member The member selectively abuts the rod portion of the inner rod member in the outer set. The surgical instrument as claimed in claim 1, wherein the outer sleeve further includes an inner tube wall, the inner tube wall defines a through hole, the through hole penetrates the outer part and the resisting part, and the inner rod The rod portion of the component is passed through the through hole. The surgical instrument as claimed in claim 7, wherein the shaft portion of the inner rod member has a first positioning surface, and the first positioning surface is a flat surface and extends from the one end of the rod portion to the other end of the rod portion. At one end, the inner tube wall has a second positioning surface. The second positioning surface is a flat surface and extends from one end of the through hole to the other end of the through hole. The second positioning surface corresponds to the first Positioning surface. The surgical instrument as claimed in claim 1, wherein the implant has a height (H0), the gripping portion of the inner rod has a height (H1), and the resisting portion of the outer sleeve has a height (H1). H2), which satisfies the following conditions: (3/4)×(H0)

(H1)

(H0), and (H2)

(H1). The surgical instrument as claimed in claim 1, wherein the gripping portion has a gripping range for the implant ranging from 60 degrees to 180 degrees from a center of the implant to a cross-sectional circumference.

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