CN111685848A

CN111685848A - Tibia osteotomy cutting device

Info

Publication number: CN111685848A
Application number: CN201910185641.1A
Authority: CN
Inventors: 叶中权
Original assignee: PAONAN BIOTECH Co Ltd
Current assignee: PAONAN BIOTECH Co Ltd
Priority date: 2019-03-12
Filing date: 2019-03-12
Publication date: 2020-09-22

Abstract

The invention discloses a cutting device for cutting tibia, comprising: the first knife rest is arranged outside the body of a patient and is provided with a knife slot so as to guide a knife to cut the tibia from the side surface of the tibia along the guide direction of the knife slot; the blocking seat is arranged at one end of the first tool rest and is positioned on the front surface of the tibia, a guide hole penetrates through the blocking seat, and the axial lead of the guide hole and the advancing path of the cutter guided by the cutter groove are positioned on the same plane; and a stop pin which penetrates into the tibia from the front surface of the tibia along the guide hole of the stop seat and is transversely arranged on the cutting path of the cutter.

Description

Tibia osteotomy cutting device

Technical Field

The present invention relates to a cutting device for cutting tibia, and more particularly to a safe cutting device for cutting tibia with a limited cutting depth.

Background

At present, a High tibial osteotomy correction operation H.T.O. for eliminating knee joint degenerative lesion is to perform an oblique osteotomy on a tibia, and adjust the position of a tibial plateau through the opening angle of the tibial osteotomy so that the gravity of a corrected patient can move to an ideal position on the tibial plateau, thereby reducing the abrasion of the original damaged end cartilage and relieving the pain of the patient.

When the traditional high-position tibial osteotomy correction operation is carried out, a doctor directly cuts the tibia of a patient by a cutter according to the experience and the guidance of an X-ray detector, and because the cutter does not have any guiding tool during cutting, a large amount of errors are easily generated in the angle of cutting the tibia.

The present invention provides a tibial osteotomy cutting device, which is developed and created by the present inventors.

Disclosure of Invention

The object of the present invention is to provide a tibial osteotomy cutting device comprising: the first knife rest is arranged outside the affected part of the patient and is provided with a knife slot so as to guide a knife to cut the tibia from the side surface of the tibia along the guide direction of the knife slot; the blocking seat is arranged at one end of the first tool rest and is positioned on the front surface of the tibia, a guide hole penetrates through the blocking seat, and the axial lead of the guide hole and the advancing path of the cutter guided by the cutter groove are positioned on the same plane; and a stop pin which penetrates into the tibia from the front surface of the tibia through the guide hole of the stop seat and is transversely arranged on the cutting path of the cutter.

The invention discloses a tibia osteotomy cutting device, which further comprises a positioning guide rail, wherein the positioning guide rail is fixed on the side surface of a tibia and is exposed outside the patient body to fix the first knife rest.

The invention discloses a tibia osteotomy cutting device, wherein a first knife rest is pivoted on a positioning guide rail so as to rotatably adjust the angle of a knife groove of the first knife rest corresponding to a tibia.

The invention discloses a tibia osteotomy cutting device, which further comprises a sliding seat, a sliding block and a cutting blade, wherein a sliding hole is formed in the sliding seat in a penetrating mode so as to be arranged on the positioning guide rail in a sliding mode, and the sliding seat is tightly pressed and positioned on the positioning guide rail through a positioning screw; and the connecting rod is arranged in the sliding groove of the sliding seat in a sliding way and fastened by a tightening screw, and the connecting rod is provided with a pivot seat for pivoting the first knife rest.

The invention discloses a tibia osteotomy cutting device, wherein one end of a first knife rest is connected with a guide rail, a blocking seat is arranged on the guide rail in a sliding manner, and a tightening screw is used for tightening and positioning the blocking seat on the guide rail.

The invention discloses a tibia osteotomy cutting device, wherein a plurality of guide holes are arranged on the blocking seat in a penetrating way, and the axial lead of each guide hole and the advancing path of a cutter guided by the cutter groove are positioned on the same plane. The axes of the guide holes are not parallel.

The invention discloses a tibia osteotomy cutting device, which further comprises a second knife rest locked on the first knife rest, wherein the second knife rest is provided with at least one guide knife groove for guiding a tool to cut the tibial tuberosity part of the tibia. The second knife rest is provided with a plurality of guide knife grooves, and the guide knife grooves are arranged in a nonparallel way to cut the tibial tuberosity part at different angles.

The invention discloses a cutting device for cutting osteotomy of tibia, wherein the positioning guide rail is a plurality of guide pins fixed on the tibia, the front section of the guide pins forms a screw to lock into the tibia, and the rear section of the guide pins forms a round rod or a polygonal rod body.

The invention discloses a tibia osteotomy cutting device, wherein a plurality of concave parts are oppositely arranged on two side walls of a cutter groove of a first cutter frame so as to allow a drill bit or a probe to extend into the cutter groove.

The invention discloses a cutting device for cutting tibia, which further comprises a positioning guide rail mounting device, wherein the positioning guide rail mounting device comprises: a seat body, a guide rail hole is arranged in a penetrating way; and an indicating rod, which comprises a first section and a second section, wherein the first section is fixed in the seat body, and the second section is parallel to the guide rail hole.

The invention discloses a cutting device for cutting a tibia, wherein a base body of a positioning guide rail mounting device is further provided with a guide pin hole in a penetrating way, so that a guide pin is allowed to penetrate into an affected part of a patient along the guide pin hole, and the position of a tibia platform is detected; the guide pin hole and the guide rail hole are parallel to each other.

The invention discloses a tibia osteotomy cutting device, which mainly provides that an operator can cut a tibia of a patient according to the guidance of a first knife rest, and the cutting depth of a cutter can be really limited due to the blocking of a blocking pin, so that the dependence on the experience of the operator is reduced, and the operation is more accurate, quicker and safer, thereby showing the superiority of the invention.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.

FIG. 1: is an exploded perspective view of the present invention.

FIG. 2: is a partial perspective view of fig. 1 assembled.

FIG. 3: is a perspective view of the invention mounted on the tibia.

FIG. 4: is a perspective view showing the tibia cutting guided by the first cutting tool.

FIG. 5: is a schematic view showing that the stopper pin blocks the cutter in a state of 90 degrees.

FIG. 6: a schematic view showing the stop pin blocking the tool in a state less than 90 degrees.

FIG. 7: is a schematic diagram showing the stop pin blocking the tool in a state greater than 90 degrees.

FIG. 8: is a perspective view showing the tibial tuberosity cut of the present invention.

FIG. 9: is the installation schematic diagram of the positioning guide rail installer.

FIG. 10: the invention is a schematic diagram of the installation of the positioning guide rail by the positioning guide rail installer.

10

positioning guide rails

10a, 10b guide pins 20 first tool carrier

21-cutter groove 22 guide rail 221 tightening screw

24 recess 30 guide hole for retaining

seat

31a, 31b, 31c

310a, 310b, 310c axis 40 stop pin 50 slide

51 slide hole 511 positioning screw 52 slide groove

53 connecting rod 521 fastening screw 531 pivot seat

532 second tool rest with axle center 532' 532

61 guide knife groove 70 positioning guide rail mounting device 71 base

711 guide pin hole 712 guide rail hole 73 indicating rod

731 first section 732 second section 74 guide pin

C1 cutter C2 cutter E1, E2, E3 cutting terminal

T tibia T1 lateral surface of F plane

T2 frontal T3 tibial tuberosity T4 tibial plateau

Detailed Description

Referring to fig. 1 to 6, the present invention relates to a tibial osteotomy cutting device, comprising: a first knife rest 20 fixed outside the affected part of the patient, the first knife rest 20 is provided with a knife slot 21 for guiding a knife C1 to cut the tibia T from the lateral surface T1 of the tibia T along the guiding direction of the knife slot 21; a block seat 30 installed at one end of the first knife rest 20 and located on the front surface T2 of the tibia T, the block seat 30 having

guide holes

31a, 31b, 31C therethrough, such that the

axial lines

310a, 310b, 310C of the

guide holes

31a, 31b, 31C and the path of the knife C1 guided by the knife slot 21 are located on the same plane F; and a stop pin 40, which penetrates into the tibia T from the front surface T2 of the tibia T along one of the

guide holes

31a, 31b or 31C of the stop seat 30 and is transversely arranged on the cutting path of the cutter C1.

The present invention discloses a tibial osteotomy cutting device, further comprising a positioning guide 10 fixed on a lateral surface T1 of a tibia T and exposed to the outside of a patient for fixing the first knife rest 20.

The present invention discloses a tibia osteotomy cutting device, wherein the first knife rest 20 is pivotally mounted on the positioning guide rail 10, so as to rotatably adjust the angle of the knife slot 21 of the first knife rest 20 corresponding to the tibia T.

The invention discloses a cutting device for cutting a tibia, further comprising a sliding seat 50, a sliding hole 51 is arranged in a penetrating way to be arranged on the positioning guide rail 10 in a sliding way, the sliding seat 50 is tightly pressed and positioned on the positioning guide rail 10 by a positioning screw 511, and a sliding groove 52 is arranged on the sliding seat 50; and a connecting rod 53, which can be axially slidably disposed in the sliding slot 52 of the sliding base 50 and fastened by a fastening screw 521, such that the connecting rod 53 is provided with a pivot base 531, pivotally connected with a pivot 532, and fixing the first tool rest 20.

In the present invention, one end of the first tool holder 20 is connected to a guide rail 22, so that the stopper 30 is slidably disposed on the guide rail 22, and is pressed and positioned on the guide rail 22 by a pressing screw 221.

In the present invention, a plurality of guiding

holes

31a, 31b, 31C are formed through the block 30, such that the

axes

310a, 310b, 310C of the guiding

holes

31a, 31b, 31C and the path of the knife C1 guided by the knife slot 21 are located on the same plane F. The

axes

310a, 310b, 310c of the

guide holes

31a, 31b, 31c are not parallel to each other.

As shown in fig. 1 and 8, the tibial osteotomy cutting device of the present invention further comprises a second tool holder 60 locked to the first tool holder 20, wherein the second tool holder 60 is provided with at least one guiding slot 61 for guiding a tool C2 to cut the tibial eminence T3 of the tibia T. The second blade holder 60 is provided with a plurality of guide slots 61, and the guide slots 61 are arranged in a non-parallel manner to cut the tibial eminence portion T3 at different angles. In the implementation of the invention, the second knife rest 60 can be locked on the first knife rest 20 to implement the cutting of the tibial tuberosity portion T3, the cutting depth reaches to the cutting plane F of the knife C1 guided by the knife groove 21 of the first knife rest 20, so that the upper section of the cut tibia T is not limited by the ligament positioned at the outer side of the tibial tuberosity portion T3, the subsequent operation of opening the tibia is facilitated, and the damage to the ligament at the outer side of the tibial tuberosity portion T3 caused when the knife C1 guides the cutting of the tibia along the knife groove 21 of the first knife rest 20 can be avoided.

The present invention discloses a cutting device for cutting osteotomy of tibia, wherein the positioning guide track 10 is composed of two

guide pins

10a, 10b parallel and fixed on the tibia, the front section of each

guide pin

10a, 10b is formed into a screw to be locked into the tibia T, and the rear section thereof is formed into a round rod or a polygonal rod body.

The present invention discloses a tibial osteotomy cutting device, wherein a plurality of recesses 24 are oppositely arranged on two side walls of a knife slot 21 of a first knife rest 20 to allow a drill bit or a probe to extend.

The present invention discloses a cutting device for cutting tibia, further comprising a positioning rail mounting device 70, wherein the positioning rail mounting device 70 comprises: a seat body 71, through which a guide rail hole 712 is formed; and an indicating rod 73 having a first segment 731 and a second segment 732, wherein the first segment 731 is fixed in the base 71, and the second segment 732 is parallel to the rail hole 712.

The invention discloses a cutting device for cutting tibia, wherein a guide pin hole 711 is further arranged on the seat body 71 of the positioning guide rail mounting device 70 in a penetrating way, so as to allow a guide pin 74 to penetrate into the affected part of a patient along the guide pin hole 711, and the position of a tibia platform T4 is detected; the guide pin hole 711 and the guide rail hole 712 are parallel to each other.

In the present invention, as shown in fig. 9 and 10, the second section 732 of the indication rod 73 of the positioning guide rail mounting device 70 is adjusted to be parallel to the tibial plateau T4 (or the position of the tibial plateau T4 is detected by a guide pin 74 penetrating through a guide pin hole 711 of the base body 71) with the aid of an X-ray detection instrument, so that the positioning guide rail 10 can be fixed in the tibia T by penetrating the positioning guide rail 10 along the guide rail hole 712 of the base body 71, since the guide rail hole 712 is parallel to the second section 732 of the indication rod 73, the mounted positioning guide rail 10 is also parallel to the tibial plateau T4, and then as shown in fig. 2, 3 and 4, the first tool holder 20 is mounted on the positioning guide rail 10 by the slide 50, the position of the first tool holder 20 can be adjusted axially along the positioning guide rail 10, and the connecting rod 53 is in the slide 50, the position of the first knife rest 20 is adjusted by sliding up and down, the angle of the first knife rest 20 can be adjusted according to the axis 532' of the pivot 532, that is, the angle of the knife C1 for cutting the tibia T is adjusted, after the adjustment is completed, the block seat 30 can be slid to a proper position, the stop pin 40 can penetrate into the tibia T along one

guide hole

31a, 31b or 31C of the block seat 30, the stop pin 40 is transversely arranged on the cutting path of the knife C1, at this time, the knife C1 can be guided along the guide groove 21 of the first knife rest 20 to cut the tibia, the cutting path of the knife C1 is blocked by the stop pin 40, so the cutting depth of the knife C1 can be really controlled, the operator does not need to control the cutting depth by a scale on the knife or the assistance of X-ray, and the invention can be applied to enable the osteotomy operation to be rapidly and safely carried out, thereby showing the superiority of the invention.

As shown in fig. 4, 5, 6 or 7, the osteotomy cutting device for tibia according to the present invention can guide the cutter C1 to generate different angles of cutting terminals E1, E2 or E3 in the tibia T when the stop pin 40 is inserted into the tibia T at different angles according to different symptoms of different patients; as shown in fig. 5, after the stop pin 40 penetrates the tibia T along the axial line 310a of the guiding hole 31a, a cutting terminal E1 forming an angle a of about 90 degrees with the horizontal axis H is generated in the tibia T, when the cutting terminal E1 is used as the axis to lift up when the tibia T is distracted, the two points a and b in fig. 4 will be lifted up simultaneously; as shown in fig. 6, after the stop pin 40 penetrates the tibia T along the axial line 310b of the guiding hole 31b, a cutting terminal E2 forming an angle a smaller than 90 degrees with the horizontal axis H is generated in the tibia T, when the cutting terminal E2 is used as the rotation axis to lift upward at the cutting position of the tibia T, the point b in fig. 4 will lift a higher distance than the point a; as shown in fig. 7, after the stop pin 40 penetrates the tibia T along the axial line 310c of the guiding hole 31c, a cutting terminal E3 with an angle a greater than 90 degrees with the horizontal axis H is generated in the tibia T, when the cutting terminal E3 is used as the rotating shaft to lift upwards at the cutting position of the tibia T, at this time, the point a in fig. 4 is lifted a higher distance than the point b, so that the present invention can meet the requirements of different patients.

The tibia osteotomy cutting device disclosed by the invention can mainly provide that an operator can cut the tibia T of a patient according to the guidance of the first knife rest 20, and the cutting depth of the cutter C1 can be really limited by the blocking of the blocking pin 40 by the cutter C1, so that the dependence on the experience of the operator is reduced, and the operation is more accurate, quicker and safer, thereby showing the superiority of the invention.

The present invention can be modified in the structure and shape without departing from the spirit and scope of the present invention, and the present invention is not limited to the above-described embodiments.

Claims

1. An osteotomy cutting device for a tibia, comprising:

the first knife rest is provided with a knife groove for guiding a knife to cut the tibia from the side surface of the tibia along the guide direction of the knife groove;

the blocking seat is arranged at one end of the first tool rest and is positioned on the front surface of the tibia, a guide hole penetrates through the blocking seat, and the axial lead of the guide hole and the advancing path of the cutter guided by the cutter groove are positioned on the same plane; and

and the stop pin penetrates into the tibia from the front surface of the tibia along the guide hole of the stop seat and is transversely arranged on the cutting path of the cutter.

2. The tibial osteotomy cutting device of claim 1, further comprising a sliding seat having a sliding hole for slidably receiving the positioning rail, and a positioning screw for urging and positioning the sliding seat on the positioning rail; and the connecting rod is arranged in the sliding groove of the sliding seat in a sliding way and fastened by a tightening screw, and the connecting rod is provided with a pivot seat for pivoting the first knife rest.

3. The tibial osteotomy cutting device of claim 1 or 2 wherein the first blade carrier has a guide track connected to one end thereof, the stop block being slidably disposed on the guide track and being a tightening screw for tightening and positioning the stop block on the guide track.

4. The tibial osteotomy cutting device of claim 1, wherein the block has a plurality of guide holes formed therethrough, and the axis of each guide hole is coplanar with the path of the cutter guided by the cutter slot.

5. The tibial osteotomy cutting device of claim 1 further comprising a second blade carrier locked to said first blade carrier, said second blade carrier having at least one guide slot for guiding a cutting tool to cut the tibial tuberosity of said tibia.

6. The tibial osteotomy cutting device of claim 5 wherein said second blade carrier defines a plurality of guide slots, each of said guide slots being non-parallel.

7. The tibial resection cutting device of claim 1, further comprising a positioning guide fixed to the lateral surface of the tibia for fixing the first blade holder, wherein the positioning guide is a plurality of guide pins fixed to the tibia.

8. The tibial osteotomy cutting device of claim 1 wherein said first blade carrier has a plurality of recesses disposed on opposite sides of said blade slot to allow insertion of a drill or probe.

9. The tibial resection cutting device of claim 8, further comprising a positioning rail mounting device, the positioning rail mounting device comprising: a seat body, a guide rail hole is arranged in a penetrating way; an indicating rod, which comprises a first section and a second section, wherein the first section is fixed in the base body, and the second section is parallel to the guide rail hole.

10. The apparatus for osteotomy of a tibia as defined in claim 9, wherein a guide pin hole is formed through the base of the positioning rail mounting device to allow a guide pin to be inserted therethrough, the guide pin hole being parallel to the guide rail hole.