TWI566739B - Improved interbody fusion device and implant instrument and method of operation thereof - Google Patents

Description

Improved interbody fusion cage and implant device and method of operation thereof

The present invention relates to an improved interbody cage and implant device and method of operation thereof, and more particularly to an interbody fusion cage implantable between adjacent vertebrae and an implant for implanting an interbody fusion cage Instruments and methods of operation.

Spinal diseases are mostly caused by long-term posture errors, sports injuries or ageing. Many spinal lesions, such as spinal stenosis or intervertebral disc herniation, are often accompanied by severe sciatica when the disease occurs. Symptoms such as limp or neuropathy, especially when the posterior portion of an intervertebral disc is damaged, the extension of the spine causes the two vertebral bodies to separate from the disc and not close together normally, which results in nerves. The roots are trapped and cause a severe pain sensation, causing the patient to be troubled by the action.

Usually such spinal lesions cannot be cured with drugs, and a valid and validated method is surgical treatment. A Spinal Interbody Fusion Cage is implanted between the failed adjacent vertebrae to reconstruct the intervertebral height. Limiting the extension of the adjacent two vertebrae to an abnormally close to each other, eliminating the condition of compressing the nerves, so as to avoid adverse characteristics such as pain in the patient's action.

Because the nerve cage and the large blood vessel are usually covered near the installation site of the interbody fusion cage, in order to avoid damage to the tissue, the wounds will be as small as possible in order to be able to perform during the operation. Effectively evading nerves and large blood vessels; Therefore, minimally invasive surgery has been widely used in the treatment of vertebral lesions. Because of its small wounds, it can greatly reduce the destructiveness of the treatment site and nearby tissues, and enhance the safety of surgery.

However, in practical applications, in order to provide proper stability between the two vertebrae, the general interbody cage must be designed in accordance with the shape of the vertebrae of the installation site, for example, the shape of the peas or the meniscus. Shape, and its size can not be too small, for example, the length is more than 35mm, to avoid the collapse of the force part caused by insufficient force area; in order to smoothly install the intervertebral cage on the correct position and angle of the vertebrae, in the past, even With minimally invasive surgery, the wound is still required to be at least 5 cm for the relevant surgical instruments and the width of the implanted interbody cage to pass. Therefore, it is one of the subjects of the related art to provide an interbody cage structure and an implantation method thereof which can minimize the surgical wound.

In the prior art, for example, US Patent Publication No. US 2012/0209383 A1 "INTERVERTEBRAL CAGE AND IMPLANTING APPARATUS AND OPERATING METHOD THEREOF" (intervertebral fusion device and implant device and its operation method) The invention discloses an intervertebral cage and an implant device and a method for operating the same, and the interbody cage can be implanted between two adjacent vertebrae by minimally invasive surgery to reconstruct the intervertebral height, in particular The interbody cage includes a joint having a consistent opening on the side wall provided with a plurality of adjacently arranged inner arc surfaces; the implant device includes a sleeve and a front end having a snap post The rod body is axially stretched between the sleeve and the rod body, so that the engaging post can be selectively engaged or not engaged in the joint of the intervertebral cage joint, so that the implant device can be clamped Holding or releasing the interbody fusion cage; in turn, adjusting the engagement position of the different inner arc surfaces of the engagement post of the implant device and the interbody fusion cage to adjust the fusion of the implant device and the intervertebral body The clamping angle of the device; accordingly, during the interbody fusion device implantation procedure, the implant device clamps the interbody cage along the long axis direction so that the interbody cage can enter the installation site through the catheter from the smallest width portion. After entering the installation site, the interbody cage is rotated in a lateral direction by changing the different clamping positions between the implant device and the interbody cage to conform to the placement angle required for the installation site.

The foregoing solution can significantly reduce the wound compared with the conventional surgery, but it also has the problem of difficulty in operation, for example, when the implanted device holds or releases the interbody cage, it is necessary to rotate the engaging post and pass it through the interbody fusion. The small slot on the device can be engaged or disengaged from the joint of the joint, so it is difficult to operate, especially after the precise operation is completed to install the cage between the vertebrae. When the engaging column is separated from the small slot, the position of the intervertebral cage is inadvertently displaced, resulting in the repositioning of the interbody cage. In addition, during the operation, the implant device and the intervertebral fusion are to be adjusted. When the clamping angle of the device is required, the engaging column and the specific inner arc surface at different positions on the cross-port are required to be fitted, but when the angle is changed, the engaging column and the interbody cage of the implanting device are deeply located in the person. In the body, it is impossible to operate visually, and it can only be operated by touch and experience. The difficulty is extremely high, and the angle of the adjustable clamping according to the combined structure is not much, which limits the precision of the implantation operation.

In view of the above, the main object of the present invention is to provide an improved interbody cage and implant device and method of operating the same, which is provided with a jaw portion composed of two elastic clip arms in the implant device, and is matched with the intervertebral space. The shaft column is arranged on the cage, so that the operation of combining or separating the interbody cage and the implant device is simple and rapid, and the one-way tooth is arranged on the jaw portion and the shaft column to make the implant device and the vertebra The combination of the inter-cluster has the advantages of easy to change the implantation angle of the interbody cage and adjust the installation position, so the present invention It can improve the ease of implant operation and improve the safety and success rate of surgery.

In order to achieve the above object, the present invention provides an intervertebral cage that can be implanted between adjacent vertebrae to reconstruct an intervertebral height. The body of the interbody cage includes an upper pad and a lower pad. a gap is maintained between the backing plate and the lower backing plate, and is joined by a plurality of vertical portions into a cage shape; the outer shape of the body is in the shape of a pea or a crescent, and the longitudinal dimension of the main body is larger than the width dimension; The front end of the long central axis has a first-line type of seeker, and an opening is formed on the rear end surface of the long central axis, and an axially disposed shaft column is arranged in the opening, and a plurality of shafts are arranged on the outer circumference of the shaft column. One-way tooth.

In particular, a non-slip structure composed of a plurality of zigzag stripes or embossed patterns having irregularities is provided on the outer surface of the upper and lower pads.

In particular, the one-way tooth is a ratchet.

In particular, the one-way tooth system is optionally disposed over the entire outer circumference of the shaft column or only a portion of the outer circumference of the shaft column.

In particular, the interbody fusion cage further includes at least two positioning targets, each of which is disposed on the main body as far apart as possible from each other; the positioning target is a hollow portion disposed on the main body, or a type of An object made on a body and made of a material different from the body.

The invention further provides a method for operating a combination of an implant device and an interbody fusion cage, comprising: providing an interbody fusion cage, the intervertebral fusion device having a shaft column, and having a plurality of one-way teeth on the outer circumference of the shaft column; An implant device is provided, the implant device mainly comprises a clamping rod and a sliding sleeve, wherein the lower end portion of the clamping rod has two elastic clamping arms, and the outer side of the two elastic clamping arms respectively has a slope extending from the inside to the outside, And the inside of the end of the two elastic clip arms The sides are respectively provided with symmetrical C-shaped crotch portions to jointly form a jaw portion, and a plurality of one-way teeth are arranged on at least one C-shaped crotch portion, and the sliding sleeve can be sleeved on the clamping rod So that the lower end edge of the sliding sleeve can be looped around the outer inclined surface of the two elastic clamping arms, and the jaw portion of the clamping rod is exposed outside the lower end edge of the sliding sleeve; and the combination is An interbody cage and an implant device, the jaw portion of the implant device is fastened to the shaft post of the interbody cage, and the lower end edge of the sliding sleeve is moved to abut the outer slope of the two elastic clip arms. The jaw portion is configured to clamp the shaft of the interbody cage, and the one-way teeth of the jaw portion are engaged with the one-way teeth on the shaft column.

In particular, the method of operation further includes the step of changing the angle of clamping between the implant device and the interbody cage: in the case of the implant device and the interbody cage being clamped and clamped, the jaw is used The clamping portion of the portion and the shaft column is a center point, and one or both of the clamping rod or the interbody cage of the implant device are rotationally displaced by an angle according to the center point, and thus, in the jaw portion In the state of clamping the shaft column, by the elastic strain characteristic of the two elastic clamping arms, the one-way tooth of the jaw portion can be displaced in a forward direction to disengage from the one-way tooth originally engaged with the shaft column, and meshed to The one-way teeth at other adjacent positions on the shaft column can thus change the clamping angle between the implant device and the interbody cage along the direction in which the one-way teeth are disposed.

In particular, the method of operation further includes the step of releasing a clamping combination between the implant device and the interbody cage: moving the sliding sleeve to displace the lower end edge of the sliding sleeve away from the two elastic clamping arms The outer inclined surface is opened by the elastic restoring force of the two elastic clamping arms, and the jaw portion releases the clamping of the shaft column, so that the implant device can interact with the interbody cage Separation.

Other functional and technical features of the present invention will be further clarified below, and the present invention can be implemented by those skilled in the art after reading the description in the text.

100‧‧‧ interbody fusion cage

121‧‧‧Upper board

122‧‧‧Under the board

121a, 122a‧‧‧ slip-slip structure

123‧‧‧

124‧‧‧ seeker

124a‧‧‧ curved surface

124b, 124c‧‧‧ bevel

125‧‧‧ openings

126‧‧‧ shaft column

127‧‧‧ ratchet

150‧‧‧Targeting target

200‧‧‧ implanted instruments

210‧‧‧ grip

220‧‧‧ pinch

221‧‧ Thread segment

222‧‧‧Long groove

223‧‧‧Flexible clamp arm

224‧‧‧Bevel

225‧‧ ‧ jaws

226‧‧‧ ratchet

230‧‧‧Sleeve

231‧‧‧ Adjusting nuts

232‧‧‧Bottom edge socket

300‧‧‧ hollow catheter

D‧‧‧ Intervertebral disc

D1‧‧‧ Side wall

V‧‧‧ vertebrae

N‧‧‧ nerve

F‧‧‧ torque

X1‧‧‧ long axis axis

X2‧‧‧ central axis

Δ‧‧‧ angle

1A is a perspective view of an interbody cage of an embodiment of the present invention.

Fig. 1B is a perspective view of another perspective view of the interbody cage of the embodiment of the present invention.

1C is a perspective view of another perspective view of the interbody cage of the embodiment of the present invention.

Figure 1D is a top plan view of an interbody cage of an embodiment of the present invention.

Fig. 1E is a plan view showing a partial cross section of the interbody cage of the embodiment of the present invention.

Figure 1F is a side elevational view of an interbody cage of an embodiment of the present invention.

2A is an exploded view of an implant device in accordance with an embodiment of the present invention.

2B is an external view of an implant device in accordance with an embodiment of the present invention.

2C is a partial cross-sectional view of the jaw portion of the implant device of the embodiment of the present invention.

3A is a close-up enlarged view of the jaw portion of the implant device of the embodiment of the present invention showing the operational combination of the implant device and the intervertebral cage.

3B is a plan view showing the combination of the implant device and the interbody cage of the embodiment of the present invention, showing that the implant device clamps the interbody cage on the same axis.

3C is a close-up enlarged view of the jaw portion of the implant device of the embodiment of the present invention, showing a state in which the implant device and the interbody fusion cage are combined.

3D is a plan view showing a combination of an implant device and an intervertebral cage changing the clamping angle according to an embodiment of the present invention, showing that the axis of the implant device clamps the interbody cage forms an angle.

3E is a close-up enlarged view of the jaw portion of the implant device of the embodiment of the present invention, showing a state in which the combination of the implant device and the interbody cage forms an angle.

3F is a close-up enlarged view of the jaw portion of the implant device of the embodiment of the present invention, showing a state in which the combination of the implant device and the interbody cage forms a maximum angle.

4A is a side elevational view showing a spinal structure having a faulty portion.

4B is a schematic illustration of the operation of implanting an interbody cage into an intervertebral disc with an implant device in accordance with an embodiment of the present invention.

4C is a schematic view showing the operation of implanting an interbody cage into an intervertebral disc with an implant device and changing the clamping angle according to an embodiment of the present invention.

Figure 4D is a schematic illustration of the embodiment of the present invention having the interbody cage mounted within the intervertebral disc.

1A to 1F, the interbody cage 100 of the embodiment of the present invention is detailed, and FIGS. 2A to 2C show the implant device 200 of the embodiment of the present invention. FIGS. 3A to 3F show the implant device of the embodiment of the present invention in detail. The combination of 200 and interbody cage 100, and FIGS. 4A-4D detail the method of operation of implanting intervertebral cage 100 between adjacent vertebrae using implant device 200 in accordance with an embodiment of the present invention.

Referring to Figures 1A-1F, the interbody cage 100 is implanted between adjacent vertebrae to reconstruct the intervertebral height. The main body of the interbody cage 100 includes an upper pad 121 and a lower pad 122. The upper pad 121 and the lower pad 122 maintain a gap therebetween, and are connected by a plurality of vertical portions 123 into a cage; the cage body In addition to reducing the weight and saving the cost of manufacturing materials, the structural features of the cage can provide space for new bone formation and enhance the fixation of the upper and lower vertebrae.

In order to maintain excellent mechanical strength and chemical resistance, and to avoid repulsion in the human body, the intervertebral cage is selected from absorbable polymer materials, not The absorbable polymer material, the metal, the ceramic, the aggregate or a combination of the above materials is used, but the scope of implementation is not limited thereto. For example, the absorbable polymer material may be, for example, polylactic acid. - Poly(lactic-co-glycolic acid, PLGA) or Poly-L-Lactic Acid (PLLA), the non-absorbable polymer may be, for example, polyetheretherketone (PEEK). The metal may be, for example, titanium or stainless steel, and the aggregate may be, for example, from a human body or other animal.

Further, on the outer surface of the upper pad 121 and the lower pad 122 of the interbody cage, the anti-slip structures 121a and 122a are provided, and the anti-slip structure is, for example, an embossed pattern of a plurality of zigzag stripes or irregularities. The anti-slip configuration can increase the positioning stability of the interbody cage 100 between the vertebrae, and avoid the consequences of surgical failure caused by the positional displacement after installation.

As is known, the shape and size of the interbody cage 100 can be determined according to the needs of the patient, but its shape must correspond to the structural shape of the mounting site, for example, when it is mounted on the leading or trailing edge of the vertebra. In general, the body appearance is in the shape of a pea or a crescent (see Fig. 1D), such that the interbody cage 100 has sufficient contact surface to bear the pressure between the vertebrae, and the interbody cage has an elongated body. That is, the long axis dimension of the main body is larger than the width of the wide axis, which is an implantation operation for facilitating minimally invasive surgery, and the interbody cage can be accessed from the smallest size portion (ie, the wide shaft portion) through the catheter into the installation site, so as to facilitate Reduce the surgical wound.

In the present embodiment, a first-line guide vane 124 is provided at the front end of the longitudinal center axis X1 of the interbody cage body, and an opening 125 is provided on the rear end surface of the longitudinal center axis X1 of the main body. The shaft column 126 is disposed in an upright direction, and a plurality of one-way teeth are disposed on the outer circumference of the shaft column, such as ratchet teeth 127, and the one-way teeth can be set At the entire outer circumference of the shaft column, or only a part of the outer circumference of the shaft column, for example, in the present embodiment, a plurality of ratchet teeth 127 are provided only in a range of about 90 degrees on one side of the outer circumference of the shaft column. The body of the seeker 124 can facilitate the smooth implantation of the interbody fusion cage 100 and ensure the safety of the implantation process; as shown in Figure 1E, the guide head 124 is disposed on the long central axis X1 of the interbody cage body. The front end edge of the guiding head is formed by a curved surface 124a between the side walls of the connecting main body and two inclined surfaces 124b and 124c extending from the upper backing plate and the lower backing plate respectively to form a three-dimensional streamlined structure.

In general, when a micro-wound is created to remove the intervertebral disc, the intervertebral disc is often unable to be completely removed and a portion of the intervertebral disc may remain; therefore, when the interbody cage 100 is implanted between the two vertebrae, The residual intervertebral disc may increase the resistance when the implant is implanted; since the implant end of the interbody fusion cage 100 of the present embodiment has a streamlined seeker 124, the annular fiber of the intervertebral disc can be easily peeled off during the implantation process. And effectively reducing the resistance formed by the residual intervertebral disc and accurately guiding the interbody cage 100 to the desired mounting position. In another aspect, the streamlined configuration at the front end of the seeker 124 prevents the intervertebral cage 100 from shifting as it advances during implantation, and prevents sharp tips from scratching or piercing peripheral nerves or tissue, The purpose of safely implanting the interbody fusion cage 100; in other words, the embodiment of the present invention can greatly improve the ease and safety of the surgical operation of the interbody fusion cage 100.

Referring to FIG. 1A and FIG. 1E , in the embodiment, the interbody cage 100 further includes at least two positioning targets 150 disposed on the main body so as to be separated from each other as far as possible. The positioning target 150 may be a hollow portion or an object made of a material different from the body. For example, when the body of the interbody cage is made of titanium metal, the positioning target 150 may be a hollow hole or any other geometrically shaped hollow portion, or the body of the interbody cage is a polymer material, and the positioning target 150 may be a cylinder made of a titanium metal material; accordingly, when the interbody cage 100 is implanted in the body, a target scanning device such as a surgical X-ray machine (C-arm) may be used. The position and angle parameters of the target 150 on the interbody cage 100 are used to immediately confirm the position and placement angle of the implant of the interbody cage 100.

2A-2C illustrate a configuration of an implant device 200 of a preferred embodiment for clamping the interbody cage 100 of the prior embodiment and implanting it between adjacent vertebrae; The implant device 200 mainly includes a grip 210, a clamping bar 220 and a sliding sleeve 230.

The upper end portion of the clamping rod 220 is pivotally combined with the grip 210, and a threaded portion 221 is disposed at a middle portion of the clamping rod, and a lower end portion of the clamping rod 220 has a long groove 222 to define two elastic clamping arms 223. The outer side of the elastic clamping arm 223 is respectively provided with a slope 224 which is gradually enlarged from the inside to the outside, and the inner side of the end of the two elastic clamping arms are respectively provided with symmetrical C-shaped jaws to jointly form a jaw portion 225, and at least A C-shaped crotch portion is provided with a plurality of one-way teeth, such as ratchet teeth 226, which are intermeshing with the ratchet teeth 127 on the aforementioned interbody cage shaft post 126.

In addition, an adjusting nut 231 is disposed on the upper end of the sliding sleeve 230, and the sliding sleeve 230 can be sleeved on the clamping rod 220, so that the adjusting nut 231 can be screwed onto the threaded section 221 of the clamping rod, and the lower end edge of the sliding sleeve is sleeved. The 232 can be looped around the outer bevel 224 of the two elastic clamping arms 223 such that the jaw portion 225 of the clamping bar is exposed outside the lower end edge of the sliding sleeve 232.

According to the implant device 200 described above, when the adjusting nut 231 on the sliding sleeve rotates, the clamping rod 220 moves axially relative to the sliding sleeve 230, so that the lower end edge of the sliding sleeve 232 and the two elastic clamping arms The position of the outer bevel 224 changes, thereby controlling the closing or opening of the jaw portion 225.

The method of operation of clamping and releasing the implant device 200 with the interbody cage 100 will be further described below in conjunction with FIGS. 3A-3F.

3A-3C show a schematic view of the operation of the implant device 200 and the interbody cage 100. First, the front end of the two elastic clip arms 223 of the implanted instrument is opened in the jaw portion 224 of the implant device. The portion penetrates into the main body through the opening 125 of the interbody cage, and the jaw portion 225 is fastened to the shaft post, and then the adjusting nut 231 is rotated to displace the sliding sleeve 230 toward the lower end of the clamping rod 220, and the lower end edge of the sliding sleeve is 232. The outer inclined surface 224 of the two elastic clamping arms abuts the C-shaped crotch portion of the two elastic clamping arms 223 toward the inner side, and the jaw portion 225 is gradually closed, thereby clamping and clamping the shaft column 126 of the interbody cage. Conversely, the sliding sleeve 230 is displaced toward the upper end of the clamping rod 220, and the lower end edge sleeve 232 of the sliding sleeve is disengaged from the outer inclined surface 224 of the top elastic clamping arm, and the two elastic clamping arm clamping arms are returned to the original position by the elastic force, so that the jaw portion is The 225 is fully open, the jaw portion 225 releases the clamping of the shaft post 126, and the implant device 200 can be separated from the interbody cage 100. The operation of clamping and releasing the jaw portion 225 to the shaft post 126 can be controlled by the adjusting nut 231 on the sliding sleeve, thereby improving the ease of the surgical operation and the stability of the manipulation of the implant device 200.

The operation mode of changing the clamping angle between the implant device 200 and the interbody cage 100 is further illustrated in FIGS. 3D to 3F; the present invention has elastic strain characteristics by the two elastic clamp arms 223, and can be implanted in the device. In the case where the interbody cage is clamped, the operation is directly performed to change the clamping angle between the two, that is, the clamping point of the jaw portion 225 and the shaft post 126 is centered, and the clip of the implanted instrument is placed. One or both of the rods 220 or the body of the interbody cage 100 are oscillatingly displaced about the center point such that the clamping bar 220 of the implant device is angled relative to the shaft post 126 of the interbody cage. This convenient and fast mode of operation is possible, for example, as illustrated in Figures 3B, 3D, in operation, with the body of the interbody cage 100 immobilized, the clamping bar 220 of the implant device is clamped The clamping portion of the portion 225 and the shaft post 126 is pivoted at an angle from the center. At this time, the jaw portion 225 and the shaft post 126 are in a sandwiched state, but are provided by the two elastic clamping arms 223. The elastic strain characteristic, the ratchet teeth 226 of the jaw portion 225 can still be displaced in a forward direction to disengage the ratchet teeth 127 originally engaged with the shaft post 126 and engage the ratchet teeth at other adjacent positions on the shaft post 126 (eg, Figure 3E); and repeating the foregoing operation allows the combination of the implant device and the interbody cage to form a maximum angle (as shown in Figure 3F).

In the above operation method, the clamping angle between the implant device and the interbody cage 100 can be directly changed when the implant device and the interbody cage are in a clamping combination, thereby making the clamping angle between the implant device 200 and the interbody cage 100. The change is very easy and the operation is extremely fast; more specifically, this change in clamping angle can be performed and completed in a very small active space, making it ideal for use in minimally invasive surgery. However, on the other hand, during the operation of changing the clamping angle, the clamping of the shaft post 126 can be performed under the moderate relaxation of the jaw portion 225, so that it can be more labor-saving and easier. The engagement of the ratchet teeth 226 of the jaw portion with the shaft ratchet teeth 127 is converted.

4A-4D illustrate the method of operation and implementation steps of implanting the interbody cage 100 using the implant device 200.

Figure 4A shows a schematic diagram of a broken spinal structure. A portion of the intervertebral disc D between two adjacent vertebrae V of the patient is compressed into the nerve N due to degeneration or prolapse. The treatment is surgically removed. The failed tissue, such as the broken bone piece, the intervertebral disc D, and the height between the two vertebrae V is reconstructed with the internal fixator and the interbody fusion cage 100 to stabilize the postoperative spine.

4B to 4D show a method of treatment using minimally invasive surgery; a hollow catheter 300 is mounted on the side of the vertebra V adjacent to the intervertebral disc D, and is intervertebral Transforaminal Lumbar Interbody Fusion (TLIF) is used to implant the cage 160 into a cavity caused by discectomy. When performing the treatment, the implant device 200 and the interbody cage 100 are first combined using the operation modes as described in FIGS. 3A-3C, that is, the jaw portion 225 of the implant device is passed through the opening of the interbody cage. 125 is fastened to the shaft post 126, and then the adjusting nut 231 is rotated so that the lower end edge of the sliding sleeve 232 abuts against the outer inclined surface 224 of the two elastic clamping arms, so that the jaw portion 225 is fastened and clamped with the shaft post 126, and The central axis X2 of the clamping rod 220 of the implant device and the long central axis X1 of the interbody cage are coincident in the same axial direction, thereby allowing the intervertebral cage 100 clamped by the implant device 200 to be smoothly It is pushed into the intervertebral disc D through the narrow hollow catheter 300.

During the operation, when the implant device 200 pushes the interbody cage 100 to the bottom of the hollow catheter 300, it may encounter resistance caused by residual tissue near the implantation site, such as residual disc D, which can be applied to the implanted device. The top edge of the grip 210 is struck by force, so that the implant device 200 holds the intervertebral cage 100 to move along the direction of the force application to advance the obstruction, thereby smoothly pushing the interbody cage 100 into the intervertebral disc D, and Avoid path deviation during the movement of the interbody cage, and injure nearby nerves and surrounding tissues.

The clamping angle of the replacement clamp and the interbody cage 100 during implantation is shown in FIG. 4C; when the interbody cage 100 is pushed into the intervertebral disc D, the guide head 124 of the interbody cage that continues to displace is contacted or When approaching the side wall D1 of the intervertebral disc D, it is necessary to change the implantation advancement angle of the interbody cage 100 for subsequent advancement displacement; wherein the clamping operation mode for changing the placement angle of the interbody cage 100 is shown in Figs. 3D and 3F. Specifically, in operation, centering on the clamping combination portion of the jaw portion 225 and the shaft post 126, the clamping rod 220 of the implanted instrument is slightly turned to the left side to make the center of the implanted device A small angle δ is formed between the axis X2 and the long central axis X1 of the interbody cage, and then the top edge of the grip 210 of the implant device is tapped to continuously advance the interbody cage 100. When the guide head 124 is subjected to the resistance of the side wall D1 and generates a counterclockwise moment F on the long central axis X1, the body of the interbody cage 100 is displaced forward by the action of the moment F. The angle of the aforementioned angle δ is gradually enlarged, and at the same time, the ratchet teeth 226 of the jaw portion are displaced in the forward direction to disengage the ratchet teeth originally engaged with the shaft column, and re-engage to the ratchet teeth of the next adjacent position. 127, thus changing the clamping angle between the implant device 200 and the interbody cage 100; repeating the aforementioned steps of changing the clamping angle and applying the force until the interbody cage 100 can be properly installed. The main area of force of the vertebra V edge, that is, the inner side of the side wall D1 of the intervertebral disc D. Since the contour shape of the interbody cage 100 of the present embodiment is close to the shape of the side wall D1 of the intervertebral disc D, and the final position after implantation is also in the main force region of the vertebra V, the interbody cage 100 can be subjected to When the force is uniform, the pressure between the vertebrae is taken, so that the support can be effectively provided.

After the positioning and positioning of the interbody cage 100 is completed, the sliding sleeve 230 is displaced toward the upper end of the clamping rod 220, so that the jaw portion 225 is opened, and the jaw portion 225 releases the clamping of the shaft column 126, and the instrument 200 can be implanted. It is separated from the interbody cage 100 and then taken out.

By the above-mentioned implantation operation method, the interbody cage 100 can be placed into the body through a narrow tube, and the implant device 200 can also operate in the narrow space to make the interbody cage 100 displace and advance the angle of the placement. In order to be installed in the correct position in the disc D; therefore, the implantation process only needs to create a micro-wound of less than 3 cm in the patient, so the patient can avoid the risk of massive blood loss caused by the large wound during the operation, and prevent the pair Damage to the surrounding tissue or nerves of the spine; a further advantage is that the patient's time to recovery after surgery can be shortened and can be avoided, for example It is the sequela of weakness or pain in the lower back.

In addition, during the aforementioned implantation process, the operating physician can utilize the target scanning device, such as a surgical X-ray machine (C-arm), to capture the position and angle parameters of the positioning target 150 on the interbody cage 100. To provide an operational reference for the immediacy of the surgical procedure, for example, when the front end of the guide head 124 of the interbody cage contacts the side wall D1 of the anterior disc, it can be judged according to relevant parameters to stop the continuous advancement of the implant device 200 and The clamping angle is changed to avoid the cutting of the side wall D1 of the intervertebral disc by the tapping process; in addition, when the advancing position or the angle of the intervertebral cage 100 is incorrect, the immediacy correction can be obtained thereby.

The above is a specific embodiment of the interbody cage and the implant device of the present invention and the method of operating the same, and the present invention is not limited thereto, and any substitutions, alterations, modifications, etc. made in the technical idea and technical principle of the present invention. All fall within the scope of protection of the present invention.

100‧‧‧ interbody fusion cage

126‧‧‧ shaft column

127‧‧‧ ratchet

224‧‧‧Bevel

225‧‧ ‧ jaws

226‧‧‧ ratchet

230‧‧‧Sleeve

232‧‧‧Bottom edge socket

X1‧‧‧ long axis axis

X2‧‧‧ central axis

Claims (20)

An interbody cage for fitting an implant device having two elastic clip arms and implantable between adjacent vertebrae to reconstruct an intervertebral height, the body of the interbody cage comprising a An upper pad and a lower pad, wherein the upper pad and the lower pad maintain a gap, and are connected by a plurality of vertical portions into a cage body; the body of the body has a pea shape or a crescent shape, and the body The longitudinal dimension of the main body is larger than the wide dimension; a front end of the longitudinal center axis of the main body is provided with a first-line guide head, and an opening is provided at a rear end surface of the long central axis, and a vertical direction is provided in the opening a plurality of first one-way teeth are disposed on the outer circumference of the shaft column, and at least one elastic clamping arm of the two elastic clamping arms is provided with a plurality of second one-way teeth, the plurality of first one-way teeth The teeth engage the plurality of second one-way teeth such that the two elastic clip arms change the clamping angle between the interbody cage and the implant device by elastic strain. The interbody cage of claim 1, wherein the anti-slip structure is provided on an outer side surface of the upper pad and the lower pad. The interbody cage of claim 2, wherein the anti-slip structure is one of a plurality of serrated stripe or embossed embossed patterns. The interbody cage of claim 1, wherein the plurality of first one-way teeth and the plurality of second one-way teeth are ratchet teeth. The interbody cage of claim 1, wherein the plurality of first one-way dentitions are selectively disposed over the entire outer circumference of the shaft column or only a portion of the outer circumference of the shaft column. The interbody cage according to claim 1, wherein the guiding head is formed by a curved surface connecting the two side walls of the main body, and extending from the upper pad and the lower pad surface respectively. The two inclined faces together form a three-dimensional streamlined structure. The interbody cage of claim 1, wherein the interbody cage is smokable A polymer material, a non-absorbable polymer material, a metal, a ceramic, an aggregate or a combination thereof. The interbody cage according to claim 1, further comprising at least two positioning targets, each of the positioning targets being disposed apart from each other as far as possible from each other. The interbody cage of claim 8, wherein the positioning target is a hollow portion provided on the main body. The interbody cage of claim 8, wherein the positioning target is an object formed on the main body and using a material different from the main body. An implant device for clamping an intervertebral cage and implanting it between adjacent vertebrae, the interbody cage comprising a shaft column, and a plurality of first sheets on the outer circumference of the shaft column The implant device includes: a clamping rod having a long groove at a lower end portion thereof to define two elastic clamping arms, and an inclined surface extending from the inside to the outside respectively on the outer side of the two elastic clamping arms, and the The inner sides of the ends of the two elastic clamping arms are respectively provided with symmetrical C-shaped crotch portions to jointly form a jaw portion, and a plurality of the first one-way teeth are disposed on the at least one C-shaped crotch portion a second one-way tooth that is engaged; a grip that is pivotally combined with the upper end portion of the clamping rod; and a sliding sleeve that is a hollow cylinder that can be sleeved on the clamping rod, The lower end edge of the sliding sleeve can be sleeved around the outer inclined surface of the two elastic clamping arms, so that the jaw portion of the clamping rod can be exposed outside the lower end edge of the sliding sleeve; Axial movement relative to the clamping rod to change between the lower end edge of the sliding sleeve and the outer inclined surface of the two elastic clamping arms Relative position, whereby manipulation of the jaw portion is opened or closed, so that the two elastic gripping arms gripping change the angle between the cage and the instrument through the elastic strain of the implant. The implant device of claim 11, wherein the plurality of first one-way teeth and the plurality of second one-way teeth are ratchet teeth. The implant device of claim 11, further comprising a threaded section at a middle portion of the clamping rod, and an adjusting nut disposed on the sliding sleeve, the sliding sleeve being sleeved on the clamping rod The adjusting nut can be screwed onto the threaded section of the clamping rod, and by rotating the adjusting nut, the axial displacement relative between the clamping rod and the sliding sleeve can be controlled. A method of operating a combination of an implant device and an interbody fusion cage, comprising: providing an interbody fusion cage, the intervertebral fusion device having a shaft column, and having a plurality of first one-way teeth on an outer circumference of the shaft column: providing An implant device comprising a clamping rod and a sliding sleeve, wherein the lower end portion of the clamping rod has two elastic clamping arms, and the outer side of the two elastic clamping arms respectively have a slope extending from the inside to the outside, and The inner sides of the ends of the two elastic clamping arms are respectively provided with symmetrical C-shaped crotch portions to jointly form a jaw portion, and a plurality of second one-way teeth are disposed on at least one C-shaped crotch portion, the sliding sleeve The sleeve can be sleeved on the clamping rod so that the lower end edge of the sliding sleeve can be sleeved around the outer inclined surface of the two elastic clamping arms, and the jaw portion of the clamping rod is exposed at the lower end edge of the sliding sleeve And the combination of the intervertebral cage and the implant device, the jaw portion of the implant device is fastened to the shaft post of the interbody cage, and the lower end edge of the sliding sleeve is moved to the sleeve The outer inclined surface of the two elastic clamping arms is arranged such that the jaw portion fastens and clamps the shaft column of the interbody cage, and The plurality of first one-way engagement with the plurality of teeth of the second one-way teeth, so that the two elastic clip arms to change the angle between the clamp and the cage by elastic strain of the implantation instrument. The method for operating a combination of an implant device and an interbody cage as described in claim 14 further comprising the step of: changing a clamping angle between the implant device and the interbody cage: When the implant device is engaged and clamped by the intervertebral cage, the clamping rod of the implant device or the interbody cage is centered on the clamping portion of the jaw portion and the shaft column One or both are rotated at an angle according to the center point, so that the jaw portion is in the state in which the jaw portion is clamped by the jaw portion, and the elastic strain characteristic of the two elastic clip arms The two one-way teeth are directionally displaceable to disengage from the first one-way tooth originally engaged with the shaft post and to engage the first one-way tooth at other adjacent positions on the shaft post to follow the first The orientation of a one-way tooth changes the angle of grip between the implant device and the interbody cage. Method for operating a combination of an implant device and an interbody cage as described in claim 14 The method further includes the step of releasing a clamping combination between the implant device and the interbody cage: moving the sliding sleeve to displace the lower end edge of the sliding sleeve away from the outer inclined surface of the two elastic clamping arms, The jaw portion is opened by the elastic restoring force of the two elastic clip arms, and the jaw portion releases the clamping of the shaft column, so that the implant device can be separated from the interbody cage. The method of operating a combination of an implant device and an interbody cage as described in claim 14, wherein the plurality of first one-way teeth and the plurality of second one-way teeth are ratchet teeth. The method of operating a combination of an implant device and an interbody fusion cage according to claim 14, wherein the implant device further comprises a threaded section at a middle portion of the clamping rod, and is disposed on the sliding sleeve When there is an adjusting nut, and the sliding sleeve is sleeved on the clamping rod, the adjusting nut can be screwed onto the threaded section of the clamping rod, and the adjusting nut is rotated to make the clamping rod and the sliding sleeve The axial relative displacement can change the working position between the lower end edge of the sliding sleeve and the outer inclined surface of the two elastic clamping arms, thereby controlling the closing or opening of the jaw portion. The method of operating a combination of an implant device and an interbody fusion cage according to claim 14, wherein the interbody fusion cage further comprises at least two positioning targets, each of which is separated from each other as far as possible. Set on the main body. The method of operating a combination of an implant device and an interbody fusion cage according to claim 19, wherein the positioning target is a hollow portion disposed on the interbody cage.