JPH0595507U - Knee joint bone piercing device for ligament tensioning - Google Patents

Abstract

(57) [Summary] (Revised) [Purpose] To accurately perforate the bone of the knee joint in order to perform artificial ligament or ligament transplantation. [Structure] Fixed side through hole 2a is provided in fixed side holding portion 2 of main body 1.
The fixed side hollow tube 4 is penetrated and fixed to the fixed side through hole 2a, and the sliding side through portion 3 is connected to the sliding side holding portion 3.
a is formed, and a hollow guide tube 6 is slidably inserted through the sliding side penetrating portion 3a. One end of the wire is previously attached to a point for tensioning the ligament to the bone of the knee joint. Is implanted and inserted from the other end of the wire from the tip side of the fixed-side hollow tube 4 to abut and fix the point for ligament tensioning, and the wire is inserted into the hollow guide tube 6 to be implanted in the bone. Then, only the hollow guide tube 6 is pulled out, and a hollow drill blade is used to accurately perforate the bone of the knee joint toward the point.

Description

[Detailed description of the device] [Industrial applications]

The present invention relates to a tool for accurately piercing a bone of a knee joint for surgically performing artificial ligament or ligament transplantation when the anterior cruciate ligament or the like of the knee joint is cut or damaged. is there.

[Background of the invention]

When an artificial ligament is stretched on a knee joint or a ligament is transplanted, the direction in which the ligament is stretched between the bones of the knee joint and the direction in which the ligament stretching hole is drilled in the bone are determined. Must match exactly.

[0003]

[Prior art and its problems]

 Therefore, in the related art, this kind of bone piercing tool according to the present invention has a driver-like fixing tool having a gripping portion fixedly penetrated to the fixing side of an arc-shaped main body as shown in FIG. The hollow tube is bent and sharpened in an acute angle to be positioned at the point of perforation for ligament tensioning of the bone, and a hollow tube set at a constant angle toward the tip is provided in the arc-shaped body. It was drilled by inserting a drill into it.

However, while the tip of the fixture is brought into contact with the point and the drill is drilled while holding the grip, the tip often shifts from the point, and the drilling direction is the point. There is a risk that the holes may be drilled in different directions from the positions.

[The purpose of the device]

The present invention has focused on the above-mentioned reasons and has solved this problem as a result of intensive studies. The position of the point of perforation for ligament tensioning of the bone and the position of the tip on the fixed side are determined. The object of the present invention is to create and provide a tool capable of drilling a hole for stretching a ligament having an accurate angle into a bone of a knee joint without shifting.

[Device configuration]

According to the configuration of the present invention, the fixed-side holding portion and the sliding-side holding portion are formed at both ends of the main body, the fixed-side through hole is formed in the fixed-side holding portion, and the tip is provided to the fixed-side through hole. The fixed side hollow tube is fixed through the fixed side hollow tube, and the sliding side holding part has an opening by setting a hole core at a certain angle with the hole core of the fixed side through hole. A through hole for locking that penetrates from the outside of the main body is formed in the sliding side through-hole, and a spherical locking member is slightly projected to the sliding side through-hole through the locking through hole. The elastic member is elastically fixed by a sealing member, and a hollow guide tube is slidably engaged with the sliding-side penetrating portion.

[Function of the device]

The effect of the present invention is to implant one end of a wire called Kirschner's tension steel wire at a point for tensioning the ligament to the bone of the knee joint in advance, and from the other end of the wire. Insert it from the tip side of the fixed side hollow tube of the bone piercing tool, contact and fix it to the point for ligament tensioning, insert a wire into the hollow guide tube and implant it in the bone, then, Only the hollow guide tube is pulled out from the sliding side holding portion, and instead of the hollow guide tube, a hollow drill blade is inserted into the wire and is inserted into the sliding side penetration portion, and the hollow drill blade is moved to the point. It is intended to accurately perforate the bone of the knee joint.

[Example of device]

The bone piercing device for ligament tensioning knee joint of the present invention which achieves the above object will be described below with reference to the drawings of an embodiment.

FIG. 1 is an overall perspective view of an embodiment of the present invention, FIG. 2 is a sectional view of a sliding side holding portion of the present invention, and FIG. 3 is a conventional example.

The present invention relates to a device for accurately piercing a bone of a knee joint to perform artificial ligament or ligament transplantation by a surgical operation when the anterior cruciate ligament of the knee joint is cut or damaged. The fixed-side holding portion 2 and the sliding-side holding portion 3 are formed at both ends of the arc-shaped main body 1, and the fixed-side holding portion 2 is provided with a fixed-side through hole 2a directed substantially in the center direction of the main body 1. The fixed side hollow tube 4 having a beak-shaped tip 4a is fixed to the fixed side through hole 2a and fixed to the sliding side holding portion 3 with the hole core of the fixed side through hole 2a. A hole core is set at an angle, and a sliding-side through-hole 3a having an opening 3b is formed on one side surface. An elastic body 5 is provided to allow the spherical locking member 5a to slightly project into the inner surface of the sliding side through portion 3 into the locking through hole 5. The sealing member 5c is elastically fixed via b, and the hollow guide tube 6 is slidably engaged with the sliding-side penetrating portion 3.

That is, according to the present invention, as shown in FIG. 1, a main body 1 formed in an arc shape having a width and a thickness is bulged inward at both ends to form a fixed side holding portion 2 and a sliding side holding portion 3. Are formed respectively, and the intermediate portions of the respective holding portions 2.3 have a shape which serves as a gripping portion at the time of treatment.

A fixed-side through hole 2a is formed in the fixed-side holding portion 2 toward the approximate center of the arc-shaped main body 1 and through the widthwise direction of the main body 1, and the fixed-side hollow tube 4 has a distal end. 4a is formed in a beak shape and has a central hole 4b in the center, and is a hollow shape, and one or more through screw holes are formed in the fixed side through hole 2a from the outside of the fixed side holding portion 2 and the through screw is formed. The fixed side hollow tube 4 is securely fixed to the fixed side through hole 2a by means such as screwing a screw into the hole and bringing the tip of the screw into contact with the outer circumference of the fixed side hollow tube 4. The beak-shaped tip 4a of the fixed-side hollow tube 4 is set to the fixed-side holding portion 2 of the main body 1 so that the beak-shaped tip 4a of the fixed-side hollow tube 4 is located at a point for ligament stretching of the bone of the knee joint. It is what you are doing.

Then, a hole core is set to the one sliding side holding portion 3 at a constant angle with respect to the hole core of the fixed side through hole 2a, that is, a slide having a substantially circular cross section having a constant angle with the point. The moving-side penetrating portion 3 is formed, and by forming the opening 3b on one side surface of the sliding-side penetrating portion 3, the sliding-side penetrating portion 3 has some elasticity and the final stage. The wire is removed through the opening 3b.

An inner surface of the sliding-side penetrating portion 3 is formed with an engaging through-hole 5 penetrating from the outside of the main body 1 on the inner surface of the sliding-side penetrating portion 3. In order to slidably and lockably pass through a hollow guide tube 6 which will be described later, a spherical locking member 5a is slightly projected and brought into contact with the side surface of the hollow guide tube 6. Is elastically fixed by a sealing member 5c through an elastic body 5b that appropriately presses.

Next, the hollow guide tube 6 is provided with a center hole 6b at the center, and can be freely slid and locked on the sliding-side penetrating portion 3a of the sliding-side holding portion 3 formed on the main body 1. It is to penetrate.

The bone piercing tool of the present invention first implants one end of a wire called Kirschner tensioning steel wire at a point for tensioning the ligament of the bone of the knee joint. A screw or the like is formed at the tip of the yarn, and is to be implanted by means of screwing into the bone by another tool, and then the beak-shaped tip 4a of the fixed side hollow tube 4 is attached to the wire. Is inserted through the other end of the wire and the tip 4a is brought into contact with the bone, whereby the wire is accurately positioned at the point.

The hollow guide tube 6 is slidably and lockably penetrated through the sliding-side penetrating portion 3, and the hollow guide tube 6 is slid by sliding the hollow guide tube 6 for the size of bones due to individual differences among patients. When the tip 6a of the hollow guide tube 6 is brought into contact with the bone drilling start position, the hollow guide tube 6 can be arranged at an angle set by the bone drilling tool. The pipe 6 is directed exactly to the above point, and a wire is inserted into the center hole 6a of the hollow guide pipe 6, and the wire is implanted by the same procedure as described above.

Next, the hollow guide tube 6 is pulled out from the sliding side holding portion 3 of the main body, leaving the wire, and a hollow drill blade is inserted into the sliding side penetrating portion 3a formed in the main body 1 in place of the hollow guide tube 6. Then, a hollow drill blade is used to drill a hole for ligament tensioning in the bone to the point.

After drilling, the hollow drill blade is removed from the sliding-side penetrating portion 3a, and the implanted wire is removed through the opening 3b to perform the operation of stretching the ligament.

[Effect of the device]

The present invention is capable of accurately piercing a hole to be formed in a bone of a knee joint when an artificial ligament is stretched on the knee joint or ligament transplantation is performed by the above-described configuration, which has a very significant effect. It plays.

[0020]

[Brief description of drawings]

FIG. 1 is an overall perspective view of an embodiment of the present invention.

FIG. 2 is a cross-sectional view of a sliding side holding portion of the present invention.

FIG. 3 is a conventional example.

[0021]

[Explanation of symbols]

 1 Main Body 2 Fixed Side Holding Part 2a Fixed Side Through Hole 3 Sliding Side Holding Part 3a Sliding Side Through Part 3b Opening 4 Fixed Side Hollow Tube 4a Tip 4b Center Hole 5 Locking Through Hole 5a Spherical Locking Member 5b Elastic body 5c Sealing member 6 Hollow guide tube 6a Tip 6b Center hole

Claims (1)

[Scope of utility model registration request] 1. A fixed-side holding portion and a sliding-side holding portion are respectively formed at both ends of an arcuate main body, and a fixed-side through hole is formed in the fixed-side holding portion so as to extend in a substantially central direction of the main body. A fixed-side hollow tube having a beak-shaped tip is fixed through the fixed-side through hole, and a hole core is set at a fixed angle to the fixed-side through hole in the sliding-side holding portion. A sliding-side through portion having an opening is formed on the side surface, and a locking through-hole is formed in the inner surface of the sliding-side through portion from the outside of the main body to the locking through-hole. Is elastically fixed by a sealing member through an elastic body that slightly protrudes the spherical locking member to the inner surface of the sliding side penetration portion, and the hollow guide tube is slidably locked to the sliding side penetration portion. A device for piercing a bone of a knee joint for ligament tensioning, which is characterized by being penetrated.