KR100562518B1 - Cutter for tibial - Google Patents

Abstract

In artificial knee replacement surgery, a tibial osteotomy is disclosed in which information about the installation position of the tibial implant is displayed on the tibial osteotomy surface so that the artificial tibial component can be installed at the correct position. The disclosed tibial osteotomy is formed in the upper side through the osteotomy groove into which the chain saw for inserting the upper tibia is inserted from the front to the rear, on both sides is formed a plurality of pin grooves through which the fixed pins are inserted into the tibia through from the front to the rear, On the rear, an alignment hole into which the alignment axis of the tibial lower limb alignment device is inserted is formed so as to penetrate from the upper side to the lower side, and a display pin for displaying information on the mounting position of the artificial tibial component on the tibial osteotomy fractured by the chain saw The insertion hole is characterized in that formed from front to back along the osteotomy groove.

Tibia, osteotomy, marking holes, marking pins, alignment

Description

Tibia Osteotomy {CUTTER FOR TIBIAL}             

1 is a perspective view of an artificial knee joint replaced with a damaged knee joint,

Figure 2 (a) is a perspective view of a conventional general tibial osteotomy,

Figure 2 (b) is a diagram of a tibial osteotomy according to the prior art combined with a tibia lower limb alignment device for arranging the tibia,

Figure 2 (c) is a view for explaining the formation of the installation groove using the tibial punch tower and tibial punch on the tibial upper fractured surface,

Figure 2 (d) is a view for explaining the preferred fixing position of the base plate fixed to the upper tibial fractures surface,

Figure 3 (a) and Figure 3 (b) is a view for explaining that the base plate is mounted in an undesired position on the tibia upper fracture bone surface,

Figure 4 is a perspective view of the tibial osteotomy according to the first embodiment of the present invention,

FIG. 5 is a view showing that a drain is formed as information on a mounting position of an artificial tibial implant on the tibial upper fractured bone surface according to the first embodiment of the present invention.

6 is a view showing a state in which the base plate is installed in a preferred position on the tibial fracture surface according to the first embodiment of the present invention,

Figure 7 is a perspective view of the tibial osteotomy according to the second embodiment of the present invention,

8 is a view showing that a display line is formed as information on the mounting position of the artificial tibial insert on the tibial upper fracture bone surface according to the second embodiment of the present invention.

9 is a view showing a state in which the base plate is installed in a preferred position on the tibial fracture surface according to the second embodiment of the present invention,

10 is a perspective view of the tibial osteotomy according to the third embodiment of the present invention,

11 is a perspective view of the tibial osteotomy according to the fourth embodiment of the present invention,

12 is a bottom view of a base plate according to the present invention;

13 and 14 are views for explaining a method of using the base plate according to the present invention.

* Description of the symbols for the main parts of the drawings *

121, 221, 321, 421: Osteotomy groove 122, 222, 322, 422: Fixing pin

123, 223, 323, 423: pin grooves 124, 224, 324, 424: alignment holes

125, 225, 325: Indicator holes 126, 226, 326: Indicator pins

327: Markhole 431: Holder

432: connecting rod 433: marker insertion rod

434: marker 500: base plate

The present invention relates to a tibial osteotomy and a base plate. More particularly, the present invention relates to a tibial osteotomy and a base plate, in which an information about an installation position of an artificial tibial component is displayed on the tibial osteotomy surface in an artificial knee arthroplasty, so that the artificial tibial component can be installed at an accurate position.

Replacement of the knee joint (10) that replaces the knee joint damaged or modified by congenital malformation, trauma, disease or degenerative arthritis has been widely performed.

Looking briefly at such artificial knee replacement surgery, after the osteotomy of the lower femur and the upper tibia to replace the damaged knee joint with the artificial knee joint, respectively, the artificial femoral insert (11) shown in FIG. The artificial tibial insert 12 is fixed to the top of the osteogenic tibia. At this time, the artificial polymer insert (13) as a buffer member for smoothing the relative motion by minimizing contact friction between the artificial femoral insert (11) and the artificial tibial insert (12) to the upper side of the artificial tibial insert fixed to the upper tibia. ) Is inserted and mounted. The artificial femoral stem and tibial component implants inserted through the surgical procedure play a role of the artificial knee joint, respectively.

Here, a brief description will be made of a method of installing an artificial tibial bone insert on the tibial osteotomy and the tibial tibial upper end that osteotomize the upper tibia.

Figure 2 (a) is shown a conventional tibial osteotomy 20 used in the artificial knee replacement surgery. The tibial osteotomy 20, as shown, the upper side is formed with a cutting groove 21 is inserted through the chain saw for cutting the tibia upper end from the front to the rear, and the fixed pin 22 is pinched in the tibia on both sides A plurality of pin grooves 23 are inserted through the front to the rear, and the rear side is formed so that the alignment holes 24 through which the alignment shaft of the tibial lower limb alignment device is inserted.

As such, as shown in Figure 2 (b), by using the tibial limb alignment device 30 to align the tibia lower body to match the mechanical axis, the tibia not to the alignment hole 24 of the tibia fracture After the alignment shaft 31 of the alignment device is inserted, the fixing pins 22 are inserted into the pin grooves 23 on both sides of the tibial osteotomy, respectively, and the tibial osteotomy is fixed to the tibia, and then the tibial lower limb alignment device is removed. Next, the top of the tibia is osteotomized by inserting a chainsaw into the osteotomy of the tibial osteotomy.

Then, the tibial punch tower 50 and the tibial punch 60 are fixed after fixing the base plate 40 on which the access hole 41 is symmetrically formed as shown in FIG. Through the upper tibial fractures to form an installation groove in the depth direction, the artificial tibial insert 12 is installed in this installation groove.

At this time, the fixed position of the base plate 40 fixed on the tibial upper fracture bone surface is very important because it determines the mounting position of the artificial tibial insert 12 which is ultimately mounted in the installation groove of the tibia, and the fixed position is As shown in Fig. 2 (d), the symmetry line 32 of the entry hole 41 should be fixed to coincide with the alignment line 32 of the alignment axis 31 of the tibia lower limb alignment device in which the tibia is aligned.

However, according to the above-described conventional tibial osteotomy and the procedure for inserting and fixing an artificial tibial insert into the upper tibial bone which is osteotomized using the tibial osteotomy, once the tibial lower limb alignment device 30 is removed, Since the base plate 30 has no information about the position at which the base plate 30 is to be fixed on the fractured tibial fracture surface, that is, the alignment line of the alignment axis of the tibial lower limb alignment device, the base plate 40 has its entrance hole 41. The symmetry line of is not fixed in line with the alignment line of the alignment axis of the tibial limb alignment device on the tibial fracture surface, and shifted to the left or right as shown in FIG. 3 (a) or fixed as shown in FIG. 3 (b). As a result, there is a problem that the rotation is fixed.

Accordingly, the installation groove in the depth direction on the tibial upper surface was formed at a position where the base plate fixed in an undesired position was not required, and the artificial tibial insert 12 inserted into the installation groove was also inserted in an undesired position. By mounting, the relative movement of the tibial insert 12 and the femoral insert 11 is not desired, resulting in postoperative side effects and shortening the life of the artificial knee joint.

The present invention has been made to solve the above problems, an object of the present invention is to display the information about the mounting position of the artificial tibial component on the tibial osteotomy in the artificial knee replacement surgery, so that the artificial tibial component will be installed in the correct position To provide a tibial osteotomy and base plate.

An object of the present invention, the upper side is formed through the front of the osteotomy is inserted through the chain saw for cutting the tibial upper end, from the front side, the plurality of pin grooves inserted into the tibia pins are inserted from the front to the rear It is formed, the rear is formed so that the alignment hole through which the alignment axis of the tibia lower limb alignment device is inserted from the upper side to the lower side, and displays the information about the mounting position of the artificial tibial component on the tibial osteotomy fractured by the chain saw It can be achieved by providing a tibial osteotomy, characterized in that the display hole is inserted into the display pin is formed from the front to the rear along the osteotomy groove.

In addition, the object of the present invention is the upper side is formed through the osteotomy groove is inserted through the chain saw for cutting the tibial upper end from the front side, both pin grooves are inserted into the tibia pins are inserted from both sides from the front to the rear Is formed through the rear, the alignment hole into which the alignment axis of the tibia lower limb alignment device is inserted so as to penetrate downward from the top, and the tibial osteotomy fractured by the chain saw while sliding each fixing pin embedded in the tibia It can be achieved by providing a tibial osteotomy, characterized in that it comprises a display unit for displaying information on the mounting position of the artificial tibial insert.

In addition, the object is a base plate which is mounted on the upper tibial bone, the access hole is symmetrically perforated in the center, the drain on which the indicator pins with GV dye can be inserted in the center bottom of the base plate from the front to the rear It can be achieved by providing a base plate characterized in that formed.

The object of the present invention described above will become more apparent from the preferred embodiment of the present invention described below with reference to the accompanying drawings.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. If necessary, the same reference numerals are given to the same components as in the prior art, and the following first to fourth embodiments relate to a tibial osteotomy, and a fifth embodiment to a base plate.

[First Embodiment]

4 to 6 are views for explaining a first preferred embodiment of the tibial osteotomy according to the present invention. Specifically, FIG. 4 is a perspective view of the tibial osteotomy according to the first embodiment of the present invention. 5 is a view showing that the drain is formed as the information about the mounting position of the artificial tibial insert on the tibial end fracture surface by the tibial osteotomy according to the first embodiment of the present invention, Figure 6 is a tibial fracture surface according to FIG. It is a figure which shows the state in which the base plate was installed in the preferable position.

In the present embodiment, the tibial osteotomy 120, as shown in Figure 4, includes a osteotomy groove 121, a plurality of pin grooves 123, the alignment hole 124 and the display hole 125.

The osteotomy groove 121 is formed to pass through the front and rear from the upper side of the tibial osteotomy so that the chain saw for cutting the tibia upper end, the plurality of pin grooves 123 is fixed pin 122 is inserted from both sides to the tibia It is formed so as to penetrate forward and rearward from the lower side of the osteotomy groove, and the alignment hole 124 is formed to penetrate upward and downward from the rear side so that the alignment shaft of the tibia lower limb alignment device is inserted.

The display hole 125 is front and rear along the osteotomy groove 121 so that the display pin 126 for displaying the information on the installation position of the artificial tibial insert 12 is inserted on the tibial fracture surface that is fractured by the chainsaw. Is formed.

Here, a preferred example of the display hole 125 is shown in FIG. Referring to this, the display hole 125 is formed in the front and rear along the osteotomy groove 121 at a position orthogonal to the alignment hole 124, and further, the display hole 125 of the osteotomy groove 121 It is a hole of circular section protruding from the lower line and upper line. In addition, the display pin is more preferably a drill comb 126 that can be drilled as shown.

Looking at the method of osteotomy osteotomy using the tibial osteotomy according to the present embodiment configured as described above, as shown in Figure 2 (b) first, as in the prior art, tibia not using the tibia lower limb alignment device 30 After aligning to match the mechanical axis is inserted into the alignment shaft 31 of the tibial lower limb alignment device to the alignment hole 124 of the tibial osteotomy, and then the fixing pin 122 pin grooves on both sides of the tibial osteotomy ( 123) respectively, and inserted into the tibia to fix the tibial osteotomy, and then remove the tibial lower limb alignment device 30, and then drill the drill 126 in the display hole 125 of the circular cross section formed along the osteotomy 121 Insert the to drill the tibia.

Then, when the chain saw is inserted into the osteotomy groove 121 and the upper tibia is deformed, on the tibial upper fracture surface, as shown in FIG. 5, the alignment shaft 31 of the tibial lower limb alignment device is arranged. The drain I-1 coinciding with the alignment line 32 is formed.

Thereafter, as shown in FIG. 6, the base plate 40 is fixed to the tibial upper fractured surface so that the entrance hole of the base plate 40 is symmetrical with respect to the drain I-1, and then FIG. As shown in (c), through the tibial punch tower 50 and the tibial punch 60 to form a depth groove on the upper tibial cross-section and then remove the base plate 40 again, the installation The artificial tibial insert 12 is installed in the groove.

As described above, according to the tibial osteotomy according to the present embodiment as the information about the mounting position of the artificial tibial component on the tibial osteotomy fractured by the chainsaw, alignment of the alignment axis of the tibial limb alignment device on the tibial upper fracture By forming the drain I-1 coinciding with the line, the base plate can be mounted at the correct position of the tibial distal fracture surface, and thus the artificial tibial insert can be installed at the correct position of the tibia.

Second Embodiment

On the other hand, as a second preferred embodiment of the present invention, another preferred example in which the display hole of the tibial osteotomy is provided in a different shape is shown in FIG. Referring to FIG. 7, the display hole 225 is formed from the front to the rear along the cutting groove 221 at a position orthogonal to the alignment hole 224, and furthermore, the shape of the display hole 225 is the cutting bone. A semicircular shape is formed in contact with the lower line of the groove 224 and protrudes from the upper line, and the display pin 226 is provided in a shape corresponding to the shape of the display hole 225.

In the method using the tibial osteotomy configured as described above, first, as shown in FIG. 2 (b), the tibial lower limb is aligned with the mechanical axis using the tibial lower limb alignment device 30, and then Insert the alignment shaft 31 of the tibial lower limb alignment device into the alignment hole 224, and the fixing pins 222 are inserted into the pin grooves 223 on both sides of the tibial osteotomy, respectively, and the tibial osteotomy is fixed to the tibia. Then, after removing the tibia lower limb alignment device, the chain saw is inserted into the osteotomy groove 221, and the tibial upper end is osteotomy.

Then, after the GV dye is buried in the display pin 226, and the display pin 226 is inserted into the display hole 225, the display pin 226 is the upper tibial bone fractured by the chain saw GV dye is applied to the tibial dissection surface by advancing while contacting the upper surface of the tibia. Then, as shown in Fig. 8, a line (I-2) on which the GV dye is matched with the alignment line of the alignment axis of the tibia lower limb alignment device is formed on the tibial distal fracture surface.

As described above, in the present embodiment, the line I-2 on the tibial fractured bone surface in which the GV dye is applied becomes information on the mounting position of the artificial tibial implant. Therefore, as shown in Figure 9, after fixing the base plate 40 to the upper tibial fracture surface so that the entrance hole of the base plate 40 is symmetrical with respect to the line (I-2) buried in the GV Tibial punch tower (50) and tibial punch (60) shown in 2 (c) to form a depth groove on the tibial upper fracture bone surface and then remove the base plate and then the artificial tibial insert in the installation groove Install (12). Then, the tibial insert can be installed at the correct position of the tibia.

Third Embodiment

The tibial osteotomy according to the third embodiment is roughly the same as the tibial osteotomy according to the second embodiment, so only differences will be described.

The tibial osteotomy according to the present embodiment is characterized in that the marker hole 327 is formed in the longitudinal center of the display pin 326 as shown in FIG. 10. Looking at the procedure, the osteotomy as in the second embodiment Insert the chain saw into the groove 321 to deceive the upper tibia and then insert the display pin 326 into the display hole 325 to seat the display pin 326 on the tibial upper fractured surface. When a line is drawn by passing a marker through the marker hole 327 formed at 326, the alignment line of the tibial lower limb alignment device of the tibial lower limb alignment device in which the tibial lower limb is aligned is also shown in FIG. 8. Lines are formed.

In the above embodiment, the line on the tibial upper fracture surface indicated by the marker is information about the mounting position of the artificial tibial insert, and thus the artificial tibial insert can be installed at the correct position of the tibia. Since the following procedure is the same as the second embodiment it will be omitted.

Fourth Embodiment

On the other hand, Figure 11 shows a tibial osteotomy according to a fourth embodiment of the present invention.

Referring to FIG. 11, the tibial osteotomy according to the present embodiment is formed in the upper side through the osteotomy groove 421 into which the chain saw for inserting the upper tibia is inserted from the front to the rear, and the fixing pins 422 to the two sides A plurality of pin grooves 423 are inserted through the front to the rear, and the rear tibial osteotomy is formed so that the alignment hole 424 through which the alignment shaft 31 of the tibial lower limb alignment device is inserted from the top to the bottom A body 420; The display unit 430 for displaying the information on the mounting position of the artificial tibial insert on the tibial osteotomy fractured by the chain saw while sliding the fixed pin 422 embedded in the tibia.

The body 420 of the tibial osteotomy according to the present embodiment is the same as that of the conventional tibial osteotomy with the conventional configuration shown in FIG. 2 (a), by sliding a fixed pin 422 embedded in the tibia by a chainsaw It characterized in that it further comprises a display unit 430 for displaying information about the mounting position of the artificial tibial insert on the upper tibial osteotomy to be osteotomy.

The display unit 430 preferably includes a holder 431, a connecting rod 432, and a marker fitting rod 433, as shown in FIG.

The holder 431 is slidably coupled to each fixing pin 422 embedded in the tibia, and the connecting rod 432 may be bent to connect the holder 431 and the holder 431. In addition, the holder 431 and the connecting rod 432 is preferably formed integrally.

One end of the marker fitting rod 433 is guided to the connecting rod 432 to be slidably fixed, and the other end of the marker fitting rod 433 is formed with a marker fitting hole into which the marker 434 is fitted. For example, the marker fitting rod 433 is fixed to the screw by the forward rotation as shown, and can be released by the reverse rotation, the inclination with respect to the connecting rod during fixing and unlocking will be selectively adjustable.

Looking at the method of osteotomy osteotomy using the tibial osteotomy according to this embodiment configured as described above, using the tibia lower limb alignment device 30 to align the tibia lower body to match the mechanical axis and then the alignment hole of the tibial osteotomy The alignment shaft 31 of the tibial lower limb alignment apparatus is inserted into the 424, and the fixing pins 422 are inserted into the pin grooves 423 on both sides of the tibial osteotomy, respectively, and the tibial osteotomy is fixed to the tibia. At this time, the holder 431 of the display portion is inserted into the fixing pin 422 embedded in the tibia, and the marker 434 is inserted into the marker fitting rod 433. Then, the marker fitting rod 433 is guided from side to side along the connecting rod 432 so that the marker 434 is positioned on the alignment line 32 of the alignment axis 31 of the tibial lower limb alignment apparatus, and then the marker fitting rod ( 433) is fixed to the connecting rod (432).

Then, the tibial lower limb alignment device 30 is removed, and the tibial upper end is osteotomized with a chainsaw, and then the holder 431 of the display part that has been repositioned is pushed back to the fixing pin 422 to move forward, and the marker 433 is used. On the tibial upper tibial plane, a line coinciding with the alignment line of the alignment axis of the tibial lower limb alignment device will be displayed.

The line marked as above becomes information about the mounting position of the tibial insert, and the artificial tibial insert is installed after the installation groove is formed symmetrically in this line, so that the tibial insert is installed at the correct position of the tibia. It becomes possible.

[Example 5]

A fifth embodiment according to the invention relates to a base plate. 12 is a bottom view of the base plate according to the present embodiment, and FIG. 13 is a view for explaining the base plate according to the present embodiment.

Base plate 500 according to the present embodiment, as shown in Figure 12, the base plate is mounted on the upper tibial bone that the access hole 510 is symmetrically punctured in the center, the bottom of the center plate There is a drain 530 in which the display pin 520, which is embedded with the GV dye, can be inserted.

Referring to Figure 13, between the tibial bone (T) is a top osteotomy and the femur (F) fractured at the bottom, respectively, a test artificial femoral insert (11-1), a test artificial tibia insert (12-1) and a base plate (500) Are shown sequentially. The test artificial femoral insert 11-1, the test artificial tibial insert 12-1, and the base plate 500 are coupled to each other, as shown in FIG. 14, between the femur (F) and the tibia (T). Will be placed temporarily.

Thus, if the test artificial femoral insert (11-1), the test artificial tibial insert (12-1) and the base plate 500 is temporarily placed between the femur (F) and the tibia (T), the femur (T) is tibial ( F) to reciprocate in the state of extension and bend along the direction of the arrow. The reciprocating movement of the femur until the extension and flexion movement of the femur is smooth, and the positions of the test artificial femoral insert 11-1, the test artificial tibial insert 12-1, and the base plate 500 are The position is corrected little by little, and later it is set to the position where the artificial femoral insert 11 and the tibial insert 12 will be installed.

As described above, when the positions of the test artificial femoral insert 11-1, the test artificial tibial insert 12-1, and the base plate 500 are set, the display pins 520 with GV as shown in the drawing are It is inserted / released into the drain 530 formed on the bottom surface of the base plate 500. Then, a line I-2 as shown in FIG. 8 is formed on the fractured upper tibial cross section. Since such a line is a line indicating the installation position of the artificial femoral insert 11 and the tibial insert 12 to be replaced, the line is ultimately substantially aligned with the alignment line 32.

When the line is formed in this way, the test artificial femoral insert 11-1, the test joint tibial insert 12-1, and the base plate 500 are disassembled, and then the base plate 500 is placed on the upper tibial cross section. Mount it. At this time, the base plate 500 is mounted so that the line of symmetry of the entrance hole 510 coincides with the line I-2 indicated on the upper tibia.

When the base plate 500 is mounted on the tibial upper end, as shown in FIG. 2c, the tibial punch tower 50 and the tibial punch 60 form a depth groove on the tibial upper fractured bone through the tibial punch tower 60 and then the base again. After removing the plate, the artificial tibial insert 12 is installed in the installation groove. Then, the tibial insert can be installed at the correct position of the tibia.

According to the tibial osteotomy and the base plate according to the present invention, there is an effect that the artificial tibial component can be installed at the correct position by displaying information on the tibial osteotomy surface on the mounting position of the artificial tibial component.

While the invention has been shown and described in connection with specific embodiments, it will be appreciated by those skilled in the art that various modifications and variations can be made without departing from the spirit and scope of the invention as indicated by the claims. It will be easy to see.

Claims (8)

On the upper side is formed an osteotomy groove through which the chainsaw is inserted for cutting the upper tibia, from the front to the rear, On both sides are formed a plurality of pin grooves penetrating the tibia are inserted from the front to the rear, At the rear, an alignment hole into which the alignment axis of the tibial lower limb alignment device is inserted is formed to penetrate from the upper side to the lower side, Tibial osteotomy, characterized in that the display hole is inserted from the front to the rear along the osteotomy groove is inserted into the display pin for displaying information on the mounting position of the artificial tibial insert on the tibial osteotomy fractured by the chainsaw. The method of claim 1, The display hole is a tibial bone fracture, characterized in that formed from front to rear along the osteotomy at a position orthogonal to the alignment hole. The method according to claim 1 or 2, The display hole is a tibial bone fracture characterized in that the circular protruding from the lower line and the upper line of the osteotomy groove. The method according to claim 1 or 2, The display hole is a tibial osteotomy, characterized in that the semi-circular protruding from the upper line and in contact with the lower line of the osteotomy groove. The method of claim 4, wherein Tibial osteotomy, characterized in that the marker hole is formed in the longitudinal center of the display pin. The upper side is formed through the oscillating groove is inserted from the front to the rear to the chain saw for cutting the tibia upper, and on both sides is formed a plurality of pin grooves penetrating the tibia is inserted from the front to the rear, the tibia is not A body formed so that the alignment hole into which the alignment axis of the alignment device is inserted is penetrated from the upper side to the lower side, And a display unit for displaying information on the mounting position of the artificial tibial component on the tibial osteotomy fractured by the chain saw while sliding the fixing pins embedded in the tibia. The method of claim 6, The display unit includes a holder slidably coupled to each fixing pin embedded in the tibia, a connecting rod connecting the holder and the holder, and one end of which is guided to the connecting rod to be slidably fixed, and a marker fitting rod into which the marker is inserted at the other end. Tibial osteotomy, characterized in that comprising a. In the base plate is mounted on the upper tibial bone is symmetrically drilled in the center, the access hole, The base plate, characterized in that the drain is formed from the front to the back in the center bottom of the base plate can be inserted into the indicator pins GV dye.

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