TWI617282B - Bone-cutting aided tool and operation method thereof - Google Patents

Abstract

A bone cutting aid and a method for operating the same, the bone cutting aid comprising a first fixing plate and a second fixing plate, the first fixing plate having a first plate body, a guiding groove, and at least two first fixing The hole and the plurality of card slots, the second fixing plate has a second plate body, a card block and at least two second fixing holes. The first fixing plate and the second fixing plate can be combined with different angles, which can shorten the assembly time and improve the surgical efficiency of the joint resection.

Description

Bone cutting aid and its operation method

The present invention relates to a cutting aid and a method of operating the same, and more particularly to a bone cutting aid and a method of operating the same, which is used on a femur or a tibia for cutting with a cutter.

Osteoarthritis is a disease that affects joints. When the cartilage in the joint is damaged or worn, osteoarthritis occurs, and the affected joints suffer from stiffness, pain, and loss of function. Osteoarthritis is common in the hip, knee, spine, and hand joints.

For example, in the case of a knee joint, in a joint replacement procedure, the surgeon uses a femoral gauge to measure the patient's femur size and selects the appropriate implant size and implant based on the patient's femur size. The position is then guided by a cutting block corresponding to the size of the implant to partially cut the distal end of the femur. The surgeon will select different reference fiducial femoral gauges according to the patient's femoral conditions. One of them is the anterior resection position of the femur based on the anterior cortex and adjusts the femur according to the size of the implant. The lateral resection position, and the other is the posterior resection position of the fixed femur, and the anterior resection position of the femur is adjusted according to the size of the value.

However, the above-mentioned conventional artificial knee joint replacement multi-intramedullary guiding device performs cutting, and in the complicated surgical procedure of replacing the positioning tool, it is easy to damage the bone marrow cavity, increase the amount of bleeding, the swelling of the affected part and prolong the postoperative recovery. In addition, the existing intramedullary guiding and cutting device adopts the assembly mode, but is relatively cumbersome and time-consuming to assemble and increases the operation time, and relies on the doctor's surgical experience to effectively perform the bone resection operation.

Therefore, it is necessary to provide an improved bone cutting aid and a method of operating the same to solve the problems of the above conventional techniques.

The main object of the present invention is to provide a bone cutting assisting tool, which can be combined with a plurality of different angles by using the first fixing plate and the second fixing plate, thereby shortening assembly time and improving surgical efficiency.

Another object of the present invention is to provide a method for operating a bone cutting aid, which can reduce the damage and reduce the wound by assisting the tool to perform joint cutting of the bone by fixing the first fixing plate and the second fixing plate on the bone. The amount of bleeding and shortened recovery time.

In order to achieve the above object, the present invention provides a bone cutting aid for fixing on a bone and cutting the bone with a cutter, the bone cutting aid comprising a first fixing plate and a second fixing plate The first fixing plate has a first plate body, a guiding groove, at least two first fixing holes and a plurality of card slots, wherein the first plate body is for abutting against a side of the bone, the guiding a guiding groove is formed on the first plate body for cutting the tool to cut the bone, and the two first fixing holes are formed on the first plate body and located on a first side of the guiding groove. The card is formed on the first plate and located on a second side of the guiding groove, and the second fixing plate has a second board a body, a block and at least two second fixing holes, the second plate is for abutting against a top surface of the bone, the block is formed on an end surface of the second plate for selectively combining a first extension line of the guiding groove of the first fixing plate intersects with a second extension line of a surface of a plate body of the second plate body to form a corresponding angle. The angle is between 1 and 12 degrees, and the two second fixing holes are formed on the second plate for respectively extending and fixing the at least two second fixing nails on the bone.

In an embodiment of the present invention, the bone cutting assisting tool further includes a first supporting rod for combining on the first fixing plate, wherein the first supporting rod has a first screw portion, and the first fixing portion The plate has a first screw hole for screwing with the first first screw portion.

In an embodiment of the invention, the first screw hole is located between the at least two first fixing holes.

In an embodiment of the invention, the first screw hole is formed at an end surface of the first plate body.

In an embodiment of the present invention, the first board body is formed with two card slots, and when the card block of the second fixing board is selectively combined in one of the two card slots, the first fixing is performed. A first extension line of the guiding groove of the plate intersects a second extension line of the surface of the plate body of the second plate body to form a corresponding angle of 3 degrees or 5 degrees.

In an embodiment of the invention, the two card slots are formed at a left end or a right end of the second side of the guiding slot of the first fixing plate.

In an embodiment of the present invention, the first board body is formed with three card slots, and when the card block of the second fixing board is selected and combined in one of the three card slots, the first A first extension line of the guiding groove of a fixing plate intersects with a second extension line of the surface of the plate body of the second plate body to form a corresponding angle of 3 degrees, 5 degrees or 7 degrees.

In an embodiment of the invention, one of the three card slots is formed at one end of the second side of the guiding slot of the first fixing plate; and the other two of the three card slots are formed at The other end of the second side of the guiding groove of the first fixing plate.

In order to achieve the above object, the present invention provides a method of operating a bone cutting aid for performing a bone cutting operation, the method comprising a combination step, a first fixing step, a second fixing step and a cutting step The step of combining is to combine a block of a second fixing plate to one of the plurality of card slots of the first fixing plate, so that a first extension line of a guiding groove of the first fixing plate Intersecting with a second extension line of a surface of the second plate body to form an angle between 1 and 12 degrees; the first fixing step is to abut the first fixing plate One side of the bone is fixed to the bone by two first fixing holes respectively extending through the first fixing holes of the first fixing plate; the second fixing step is to abut the second fixing plate against the bone a top surface, and two second fixing holes are respectively inserted into the second fixing holes of the second fixing plate to be fixed on the bone; the cutting step is to guide a guide of the first fixing plate by using a cutter The groove is cut to cut the bone.

In an embodiment of the invention, in the method of operation of the bone cutting aid, the bone is a femur or a tibia.

As described above, the first fixed plate and the second fixed plate can be combined to design a plurality of different angles, wherein the specific angle can be adjusted according to the preoperative evaluation of the patient to assist the physician to smoothly perform the joint removal of the bone, not only the cutting. The flexible cutting tool with angle selection can help doctors perform surgery, the weight of surgical equipment is simplified and the equipment preparation and material resources can be simplified. The effect is shortened, and at the same time, the amount of postoperative related bleeding is reduced, and the damage of invading the bone marrow cavity during the operation of the artificial joint replacement surgery is reduced.

100‧‧‧ bone cutting aids

101‧‧‧ bones

2‧‧‧First fixed plate

21‧‧‧ first board

22‧‧‧ guiding slot

23‧‧‧First fixing hole

24‧‧‧ card slot

25, 25'‧‧‧ first screw hole

3‧‧‧Second fixed plate

31‧‧‧Second plate

32‧‧‧ card block

33‧‧‧Second fixing hole

34‧‧‧Second screw hole

35‧‧‧ calibration slot

36‧‧‧ Groove

37‧‧‧ trapped hole

4‧‧‧First support pole

41‧‧‧First screw department

5‧‧‧second support pole

51‧‧‧Second screw section

L1‧‧‧ first extension line

L2‧‧‧ second extension line

A‧‧‧ angle

S201‧‧‧ combination step

S202‧‧‧First fixed step

S203‧‧‧Second fixation step

S204‧‧‧Cutting step

1 is an exploded view of a preferred embodiment of a bone cutting aid according to the present invention; and FIG. 2 is a combined view of a preferred embodiment of the bone cutting aid according to the present invention; FIGS. 3 and 4 are A schematic view of a first fixing plate according to a preferred embodiment of the bone cutting aid of the present invention; and FIG. 5 is a schematic view of a second fixing plate according to a preferred embodiment of the bone cutting assisting tool of the present invention; A schematic view of a preferred embodiment of the bone cutting aid of the present invention secured to the bone; and FIG. 7 is a flow chart of a preferred embodiment of the method of operating the bone cutting aid in accordance with the present invention.

The above and other objects, features and advantages of the present invention will become more <RTIgt; Furthermore, the directional terms mentioned in the present invention, such as upper, lower, top, bottom, front, rear, left, right, inner, outer, side, surrounding, central, horizontal, horizontal, vertical, longitudinal, axial, Radial, uppermost or lowermost, etc., only refer to the direction of the additional schema. Therefore, the directional terminology used is for the purpose of illustration and understanding of the invention.

Please refer to FIGS. 1 and 2 for a preferred embodiment of the bone cutting aid of the present invention for fixing on a bone 101 as shown in FIG. 6, such as a femur or a tibia, and engaging a cutter ( The bone is cut without cutting. The bone cutting aid 100 includes a first fixing plate 2 and a second fixing plate 3. The detailed construction, assembly relationship, and operation principle of each element will be described in detail below.

With reference to the first and second figures, the first fixing plate 2 has a first plate body 21, a guiding groove 22, at least two first fixing holes 23, a plurality of card slots 24 and two first screw holes 25. 25'. The first plate body 21 is configured to abut against a side surface of the bone 101 (as shown in FIG. 6). The guiding groove 22 is formed on the first plate body 21 for the tool to extend. The first fixing hole 23 is formed on the first plate body 21, and the two first fixing holes 23 are located on a first side of the guiding groove 22 for respectively at least two A fixing nail (not shown) is stretched, and the first plate body 21 is fixed on the bone 101. The card slots 24 are formed on the first plate body 21, and the card slots 24 are located. a second side of the guiding slot 22, wherein the first side and the second side of the guiding slot 22 are opposite to each other; the first screw hole 25 is located on the first side of the guiding slot 22, and the first A screw hole 25 is formed between the two first fixing holes 23, and the other first screw hole 25' is formed at one end surface of the first plate body 21.

The second fixing plate 3 has a second plate body 31, a block 32 and at least two second fixing holes 33, a second screw hole 34 and a calibration slot 35. . The second plate body 31 is configured to abut against a top surface of the bone 101. The block 32 is formed on an end surface of the second plate body 31 for selectively combining the first fixing plate 2 One of the card slots 24 is formed such that a first extension line L1 of the guiding slot 22 of the first fixing plate 2 intersects with a second extension line L2 of a board surface of the second board body 31. Corresponding angle A, where the angle A is between Between 1 and 12 degrees, the two second fixing holes 33 are formed on the second plate body 31 for respectively providing at least two second fixing nails (not shown) for being fixed on the bone 101. A calibration groove 35 is formed on the second plate body 31 for aligning the position of the second fixing plate 3 against the bone 101, and the alignment groove 35 and the block 32 are formed on the same side of the second plate body 31. .

As shown in FIG. 3 , the bone cutting assisting tool 100 further includes a first supporting rod 4 for combining on the first fixing plate 2 , wherein the first supporting rod 4 has a first screw portion 41 . The first screw hole 25 can be used to screw with the first screw portion 41. In addition, as shown in FIG. 4, another first screw hole 25' is formed on one end surface of the first plate body 21, and the first screw hole 25' can also be used to be screwed with the first screw portion 41. .

As shown in FIG. 5 , the bone cutting aid 100 further includes a second holding rod 5 for combining on the second fixing plate 3 , wherein the second holding rod 5 has a second screw portion 51 . The second fixing plate 3 has a second screw hole 34 formed on the second plate body 31 and located between the second fixing holes 33. The second screw hole 34 can be used with the second screw portion. 51 phase screwing.

Referring to Figures 1, 2 and 6, the first plate body 21 is formed with three card slots 24, and when the block 32 of the second fixing plate 3 is selectively combined with one of the three card slots 24 When the first extension line L1 of the guiding groove 22 of the first fixing plate 2 and the second extension line L2 of the surface of the plate body of the second plate body 31 are intersected to form a corresponding 3 degrees, 6 degrees or 7 The angle of the degree. Specifically, one of the three card slots 24 is formed at one end of the second side of the guiding slot 22 of the first fixing plate 2, and the other two of the three card slots 24 are formed at the first At the other end of the second side of the guiding groove 22 of a fixing plate 2. In other embodiments, only the two card slots 24 can be formed on the first board body 21. When the card block 32 of the second fixing board 3 is selectively combined in one of the two card slots 24, The first extension line L1 of the guiding groove 22 of the first fixing plate 2 and the plate body table of the second plate body 31 The second extension lines L2 of the faces intersect to form a corresponding angle of 3 or 5 degrees, wherein the two card slots 24 are formed at a left end of the second side of the guiding slot 22 of the first fixing plate 2 Or at the right end.

Referring to FIGS. 1 and 2, the second fixing plate 3 further includes a recess 36 and a plurality of trap holes 37 formed on the second plate body 31, and the recess 36 and the The alignment grooves 35 are respectively located on opposite sides of the second plate body 31. The trap holes 37 are formed on the second plate body 31 and are located on both sides of the groove 36. In the embodiment, the first plate body 21 is tapered from the guiding groove 22 toward the first fixing holes 23 .

According to the above structure, the bone cutting aid of the present invention performs positioning by using an extramedullary method to assist in the joint cutting of the bone during the knee joint replacement, and firstly determines the first fixed plate 2 for the preoperative evaluation of the patient. The second fixing plate 3 needs to be combined with an angle A, for example 5 degrees, and then the block 32 of the second fixing plate 3 is combined to the card slot 24 of the first fixing plate 2; then the first fixing plate 2 is a plate body 21 is abutted against the side of the bone 101, and is fixed to the bone 101 by a first fixing nail (not shown) extending through the first fixing hole 23 of the first fixing plate 2, and then The second plate body 31 of the second fixing plate 3 abuts against the top surface of the bone 101 and is fixed to the second fixing hole 33 of the second fixing plate 3 by a second fixing nail (not shown). On the bone 101, a cutter is used to penetrate a guiding groove 22 of the first fixing plate 2, thereby cutting the bone 101 to complete the resection of the femur or tibia, and performing an artificial knee replacement surgery.

With the above design, the first fixing plate 2 and the second fixing plate 3 can be used to select a plurality of different angles, wherein the specific angle can be adjusted according to the preoperative evaluation of the patient to assist the doctor to smoothly perform the bone. Joint resection, not only the cutting angle selection of flexible cutting tools can help doctors perform surgery, the weight of surgical equipment and simplify equipment preparation Human and material resources can effectively shorten the operation time, and at the same time reduce the amount of postoperative related bleeding, and reduce the degree of damage caused by the removal of the joint into the marrow cavity during the implementation of artificial joint replacement surgery.

Referring to FIG. 7 and in conjunction with FIGS. 2 and 6, a preferred embodiment of the method of operating the bone cutting aid of the present invention utilizes the bone cutting aid to operate a bone 101 (femur or tibia). The operation method includes a combination step S201, a first fixing step S202, a second fixing step S203, and a cutting step S204. The operation of each step will be described in detail below.

Referring to FIG. 7 and in conjunction with FIGS. 2 and 6, in the combining step S201, a card block 32 of a second fixing plate 3 is selectively combined to a plurality of card slots 24 of a first fixing plate 2. One of the first extension lines L1 of a guiding groove 22 of the first fixing plate 2 and a second extension line L2 of a plate surface of the second plate body 31 intersect to form an angle A. Wherein the included angle is between 1 and 12 degrees, such as 3 degrees, 5 degrees, 7 degrees, 9 degrees, and 11 degrees, etc.; in addition, a first support rod 4 is assembled to the first fixed plate 2 Or a second support rod 5 is combined on the second fixing plate 3 for the physician to hold.

With reference to FIG. 7 and in conjunction with FIGS. 2 and 6, in the first fixing step S202, a first plate 21 of the first fixing plate 2 is abutted against a side of the bone 101, and Two first fixing holes 23 of the first fixing plate 2 are respectively inserted into the bones 101 by two first fixing nails (not shown).

With reference to FIG. 7 and in conjunction with FIGS. 2 and 6, in the second fixing step S203, a second plate 31 of the second fixing plate 3 is abutted against a top surface of the bone 101. The second fixing holes 33 of the second fixing plate 3 are respectively inserted into the bones 101 by two second fixing nails (not shown).

With reference to FIG. 7 and the second and sixth figures, in the cutting step S204, a guiding groove 22 of the first fixing plate 2 is penetrated by a cutter, and then the bone 101 is cut. Complete the joint resection of the femur or tibia. After the joint resection is completed, the first fixation plate 2 and the second fixation plate 3 can be removed, and subsequent artificial knee replacement surgery is performed on the femur or tibia.

As described above, the first fixed plate 2 and the second fixed plate 3 can be used to select a plurality of different angles, wherein the specific angle can be adjusted according to the preoperative evaluation of the patient to assist the physician to smoothly perform the joint removal of the bone. The flexible cutting tool that not only selects the angle of the cutting can help the doctor perform the operation, the weight of the surgical equipment and the simplification of the equipment preparation and material resources, can effectively shorten the operation time, and at the same time reduce the amount of postoperative related bleeding and reduce the implementation of artificial joint replacement surgery. Invasion of the marrow cavity.

The present invention has been disclosed in its preferred embodiments, and is not intended to limit the invention, and the present invention may be modified and modified without departing from the spirit and scope of the invention. The scope of protection is subject to the definition of the scope of the patent application.

Claims (10)

A bone cutting aid for fixing on a bone and cutting the bone with a cutter, the bone cutting aid comprising: a first fixing plate having: a first plate body for abutting against a side surface of the bone; a guiding groove formed on the first plate body for the cutter to extend and cut the bone; at least two first fixing holes formed on the first plate body and located at the a first side of the guiding groove for respectively extending and fixing at least two first fixing nails on the bone; and a plurality of card slots formed on the first plate body and located at the guiding groove a second fixing plate, comprising: a second plate body for abutting against a top surface of the bone; a card block formed on an end surface of the second plate body for selectively combining One of the slots forms a first extension line of the guiding slot of the first fixing plate and a second extension line of a surface of the second board body to form a corresponding angle The angle is between 1 and 12 degrees; and at least two second fixing holes are formed on the second plate body, Respectively for the at least two second fixing extending impalement is fixed on the bone. The bone cutting assisting tool according to claim 1, further comprising a first supporting rod for combining on the first fixing plate, wherein the first supporting rod has There is a first screw portion, and the first fixing plate has a first screw hole for screwing with the first first screw portion. The bone cutting aid of claim 2, wherein the first screw hole is located between the at least two first fixing holes. The bone cutting aid of claim 2, wherein the first screw hole is formed at one end surface of the first plate body. The bone cutting auxiliary tool according to claim 1, wherein the first plate body is formed with two of the card slots, and when the block of the second fixing plate is selectively combined with one of the two card slots, And intersecting the first extension line of the guiding groove of the first fixing plate with the second extension line of the surface of the plate body of the second plate body to form a corresponding angle of 3 degrees or 5 degrees. The bone cutting aid of claim 5, wherein the two card slots are formed at a left end or a right end of the second side of the guiding slot of the first fixing plate. The bone cutting auxiliary tool according to claim 1, wherein the first plate body is formed with three such card slots, and when the block of the second fixing plate is selectively combined in one of the three card slots, And intersecting the first extension line of the guiding groove of the first fixing plate with the second extension line of the surface of the plate body of the second plate body to form a corresponding angle of 3 degrees, 5 degrees or 7 degrees. The bone cutting assisting tool of claim 7, wherein one of the three card slots is formed on a second side of the guiding groove of the first fixing plate The other end of the three slots is formed at the other end of the second side of the guiding slot of the first fixing plate. A method for operating a bone cutting aid using a bone cutting aid as described in claim 1 for performing a bone cutting operation, the method comprising: a combination step of inserting a block of a second fixing plate Selecting a combination of a plurality of slots of a first fixing plate, a first extension line of a guiding groove of the first fixing plate and a second surface of a plate body of the second plate body The extension lines intersect to form an angle between 1 and 12 degrees; in a first fixing step, the first fixing plate abuts against a side of the bone, and respectively penetrates the first fixing nails Two first fixing holes of the first fixing plate are fixed on the bone; a second fixing step abuts the second fixing plate against a top surface of the bone, and respectively penetrates the second fixing nails The second fixing holes of the second fixing plate are fixed on the bone; and in a cutting step, the cutting head is cut by a cutter extending through a guiding groove of the first fixing plate. The method of operating a bone cutting aid according to claim 9, wherein the bone is a femur or a tibia.