WO2011078466A1

WO2011078466A1 - Surgical instrument for avasclar necrosis of femoral head

Info

Publication number: WO2011078466A1
Application number: PCT/KR2010/005868
Authority: WO
Inventors: 김석중
Original assignee: 가톨릭대학교 산학협력단
Priority date: 2009-12-21
Filing date: 2010-08-31
Publication date: 2011-06-30
Also published as: KR101075847B1; KR20110071432A

Abstract

The present invention relates to a surgical instrument for avasclar necrosis of femoral head capable of improving the adaptability of a patient after surgical operation by carrying out the implant without exhausting a hip joint bone of a patient. The surgical instrument according to the present invention comprises a center pin comprising a needle structure having a predetermined diameter and length, pressurized and provided at necrotic lesions of the femoral head; a core decompressor wherein a center portion is guided by the center pin, one end is mounted on a drill handpiece and the other end has a cylindrical saw shape, for sawing from the surface of femur to the necrotic lesions of the femoral head at a predetermined distance; a harvester which is put into the femur along the perforation formed by the saw and winds the sawn end of the femur to extract the same; and a compression tool for pressurizing the femur cell extracted from the harvester so as to expand a diameter, thereby re-putting the femur cell into the perforated position to induce self-bonding. Therefore, the present invention improves the adaptability of a patient during implant by using a hip joint bone of a patient and reduces surgical operation time by not implanting a hip joint bone of other people.

Description

Femoral head avascular mass treatment instrument

The present invention relates to a surgical instrument, and more particularly, by reassembling the Greater trochanter fragment of the femur extracted during the treatment of the avascular necrosis of femoral head, self-association of the great electron fragment It relates to a surgical instrument that is used to induce femoral head avascular necrosis.

In general, a femoral head avascular necrosis is a disease in which the head of the femoral head is blocked and the femoral head dies. Blood circulation disorders occur in part or all of the femoral head due to various causes, resulting in progressive necrosis, and eventually the hip joint is destroyed, resulting in secondary osteoarthritis.

In general, about 70% of patients are found in 30 to 60 years of age, especially in the 30 to 40 age group. The ratio of men and women is usually 3: 1. About 50% of patients also develop bilaterally. Major femoral neck fracture, traumatic hip dislocation, decompression sickness, diving disease, infarction due to sickle cell disease, symptomatic femoral head necrosis after irradiation, etc. In recent years, the association between long-term drinking, including corticosteroid administration and alcoholism has been reported.

As such, the reason why acute necrosis of the femoral head occurs in the middle aged group in their 30s and 50s with active social activities is not clear to date. However, femoral head avascular necrosis is believed to be caused by excessive drinking, abuse of steroid hormones, accidental hip fracture, sequelae of dislocation, and genetic factors.

In addition, the most likely cause of drinking alcohol is known to increase the concentration of cholesterol in the blood is easy to coagulate blood clots it is known to cause necrosis. The elderly in their 30s and 50s are analyzed to have a high probability of developing disease because they are on a continuous line of frequent drinks due to entertainment, meetings, and stress. According to the Journal of the Korean Hip Society, the association between femoral head avascular necrosis and alcohol consumption is known to be 10-70%, which has been revealed by various animal experiments. In addition, in Koreans with a specific drinking culture, the incidence of avascular necrosis of the femoral head is reported to be five times higher than in the West.

As a subjective symptom of avascular necrosis of the femoral head, seizure pain may suddenly appear in the hip or knee joint. Due to this limitation of joint movements and symptoms of leg swelling, the symptoms improve when stabilized, but when the deformation of the head progresses and the degree of incompatibility of the joint becomes severe, even if you feel stable, you feel pain and impair the joint movement. Complications include cirrhosis, fatty liver, diabetes, gout, nephrotic syndrome, systemic lupus erythematosus, and atherosclerosis. If left untreated, your joints will break and lose their function.

Here, the surgical treatment method can be largely divided into a method of saving the patient's own joints and a method of artificial joint replacement, and femoral head perforation or central decompression is used during the procedure for maintaining the original joint. And, if such a procedure is used, the operation is performed to remove the necrotic part of the femoral head and transplant the stem cells with the autogenous iliac bone graft.

This procedure involves removing healthy spongy bones from the hip joint (elbow-pelvis bone) of the patient, removing dead bones from the head, and compressing the bones. If the use of the long bone is not appropriate, another hip joint bone is used. Done. Therefore, when the hip bone of another person is used, there is a problem of lengthening the patient's adaptation time after the operation, whereas when the patient's long bone is implanted, the procedure time is increased and the patient's pain is increased after the operation have.

The present invention has been made to solve the above problems, and an object of the present invention is to enable reassembly of the hip bone extracted during the procedure due to the femoral head avascular necrosis after the procedure, thereby minimizing postoperative pain for the patient. To provide a femoral head avascular necrosis surgical instrument and a method using the same.

Another object of the present invention to provide a simplified surgical instrument, to provide a surgical instrument using a femoral head avascular necrosis that can improve the stability of the procedure by increasing the precision and ease of the procedure.

The apparatus for using the femoral head avascular necrosis according to the present invention for achieving the above object is pressurized to the necrotic site of the femoral head, the center pin made of a needle bar structure having a predetermined diameter and length; The center is guided by the center pin, one end is mounted to the drill handpiece and the other end is made in the form of a cylindrical saw, the central decompressor for sawing (sawing) by a predetermined distance unit from the surface of the femur to the necrotic part of the femoral head Core Deccompressor; A harvester which is inserted into the femur along the perforation formed by the saw, and then winds up the end of the sawed femur and extracts it; And a compression mechanism that presses the femur cell to expand its diameter so as to retract the femur cell extracted from the harvester into the perforated position to induce self-bonding.

In one embodiment of the present invention, in order to minimize ductility in the manufacturing process, the center pin may be made of any one material of stainless steel, cobalt chromium, titanium alloy and ceramic.

In one embodiment of the present invention, the central pressure reducer is a hollow structure having a predetermined diameter and length is formed of a cylindrical body having an extraction hole for extracting the hip joint at the lower end, a front end of the cylindrical body is formed in the perforated femur Saw for forming, formed in the rear end of the cylindrical body is formed of a fastening projection to be fastened to the drilling handpiece, extending inward from the fastening projection to form a guide hole for guiding the center pin, the guide hole is It may have an extended structure with the extraction hole.

In one embodiment of the present invention, the central pressure reducer is made of any one of stainless steel, cobalt chromium, titanium alloy and ceramic; The cylindrical enclosure may be provided with a measuring means capable of displaying the capacity or distance in the longitudinal direction.

In one embodiment of the present invention, the harvester has a hollow structure of the octagonal pillar, both ends are open and the saw blade of the metal material for drawing a portion of the femur by diffracting the outer peripheral surface, the cutting enclosure It may be made of a see-through for visually recognizing the capacity of the femur drawn out is installed close to the shear opening surface of, the pusher to discharge the femur drawn into the other end opening surface of the cutting enclosure to the pressure discharge to the outside.

In one embodiment of the present invention, the harvester is introduced into the femur along the path punctured by the central decompressor, to accommodate the end of the femur, the transparent tube of transparent material, both ends of which are opened A head for winding the end of the received femur is provided and has a handle at the other end, and may be composed of a drawing tube flowing along the inner circumferential surface of the transparent tube.

In one embodiment of the present invention, the head has a through hole for penetrating the center pin is formed in the center, a circular depression having a hemispherical cross section around the through hole is provided, the handle and A support guide may be formed at the end of the opposing transparent tube.

In one embodiment of the present invention, the compression mechanism, the lower panel consisting of a seating panel for seating the femur cell, a handle extending from the seating panel, and has the same structure as the lower compressor and the center of the hinge An upper compressor installed to face the 'X' shape; A flow preventing pin joined to a center of a seating panel of the lower compressor to prevent the flow of the femur cell, and a pin hole formed in the upper compressor to face the flow preventing pin; It may be composed of a fastening means for maintaining the pressing force of the handle and the pressure release means for releasing the pressing force of the handle is provided between each handle of the lower compressor and the upper compressor.

In one embodiment of the present invention, the outer circumferential surface of the seating panel of the upper compressor is further included a departure prevention guide for preventing the departure of the femur cell, the release prevention guide may be a sawtooth shape formed along the arc.

In one embodiment of the present invention, the fastening means and the pressure release means, a plurality of gear net is formed on the outer surface of the first locking projection extending inwardly from the handle of the upper compressor, the first locking projection and the corresponding A support rod having a pivoting hinge is formed at a predetermined position of the lower compressor, and includes a gearnet such that the second locking projection rotated a predetermined angle by the pivoting hinge is opposed to the first locking projection, and is perpendicular to the second locking projection. The second locking projection may be rotated from the extended release handle.

In one embodiment of the present invention, the release handle, the leaf spring is mounted between the lower compressor around the rotating hinge may be to maintain a lock (LOCK) state between the lower compressor and the upper compressor.

In addition, the present invention is a method of using a procedure for using a femoral head avascular necrosis according to the present invention, comprising the steps of: a) forming a perforation from the surface of the femur to the necrotic site of the femur so that the center pin is guided; b) inserting the center pin into the perforated position; c) starting the drill handpiece after the central pressure reducer is guided to the center by the center pin; d) sawing a certain distance by the central pressure reducer; e) removing the central decompressor and extracting a portion of the femur sawn by the harvester; f) extracting the plurality of femoral cells by removing the harvester, feeding back to step d) to be sawed from the surface of the femur to the necrotic part of the femoral head, and depressurizing the necrotic part of the femoral head; g) pressing the plurality of femur cells by the compression mechanism to expand the diameter; And h) recombining the plurality of femoral cells formed in step g) into the puncture site provided by the central decompressor; and providing a procedure for treating femoral head avascular necrosis.

In one embodiment of the present invention, the distance sawed by the central pressure reducer in step d) may be 1cm to 2cm.

In one embodiment of the present invention, i) may further comprise the step of introducing the bone cement into the drilling site provided by the central pressure reducer.

The surgical instrument using the femoral head avascular necrosis presented in the present invention and the method using the same, by providing a surgical instrument to be reassembled after the operation of the hip bone extracted during the operation due to the femoral head avascular necrosis, the hip bone of the patient It is effective to increase the physical fitness of the patient after surgery by implanting without exhausting. In addition, by using the surgical instrument according to the present invention, it is possible to exclude the existing process of filling the hip joint bone of another part of the patient or the patient himself to the hollow area after the operation to reduce the operation time.

1 and 2 are perspective views showing the center pin and the central decompressor of the treatment apparatus according to the present invention.

3, 4, and 5 are views for explaining the treatment method of the present invention.

6 is a perspective view illustrating a harvester according to a first embodiment of the present invention.

FIG. 7 is a diagram for describing an operating state of FIG. 6.

8 is a perspective view illustrating a harvester according to a second embodiment of the present invention.

FIG. 9 is a diagram for describing the head of FIG. 6.

10 is a cross-sectional view of FIG. 7.

11 is a diagram showing a femur cell extracted by the present invention.

12 is a perspective view showing a compression mechanism of the surgical instrument according to the present invention.

Figure 13 is an enlarged view showing the fastening means and the pressure release means of FIG.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a perspective view showing a first mechanism for the femoral head procedure according to the present invention. As shown, the first mechanism represents a center pin 101 made of a rod structure having a predetermined diameter and length. It will be apparent that the center pin 101 may be processed so that its end portion is sharpened to facilitate the procedure.

In addition, the center pin 101 is preferably used to minimize the ductility in the manufacturing process, for example, stainless steel, cobalt chromium, titanium alloys, ceramics, and the like. If necessary, medical plastic or bone cement may be used. On the other hand, in the present invention as a second mechanism to be used with the center pin 101, to form a penetrating path to the hip joint to perform the necrotic femoral head. Thus, the second mechanism is a core decompressor mounted and used on the drilling handpiece.

As shown in FIG. 2, the second mechanism, that is, the central pressure reducer 120 is a hollow structure having a predetermined diameter and length, and a cylindrical housing 103 having an extraction hole 109 for extracting hip joints at a lower end thereof. ), Formed by the front end of the cylindrical body 103 is formed of a saw 107 for forming a perforation in the hip joint, and a fastening protrusion 105 formed at the rear end of the cylindrical body 103 and fastened to a drilling handpiece. It extends inwardly from the fastening protrusion 105 to form a guide hole 111 for guiding the center pin 101, the guide hole 111 has an extension structure with the extraction hole 109.

Typically, the hip joint is divided into the femur, femoral neck, and femoral head, and the distance from the lateral femoral cortex to the femoral head is approximately 9 cm to 10 cm. Here, the central decompressor 120 should be longer than 9 cm to 10 cm, which is the distance from the femur to the femoral head. Therefore, the length of the cylindrical enclosure 103 of the central decompressor 120 is 12 cm to 15 cm. In addition, the length of the center pin 101 drawn into the central pressure reducer 120 should be set to be the same as or similar to the length of the central pressure reducer 120.

In addition, the diameter of the center pin 101 is appropriately 2mm ~ 4mm, preferably 3mm. The guide hole 111 of the central pressure reducer 120 extends 0.2 mm to 0.4 mm more than the diameter of the center pin 101 so that the center pin 101 slides, preferably 0.3 mm. In addition, the guide hole 111 may be preferably extended to 5cm ~ 7cm, preferably 6cm. On the other hand, the central pressure reducer 120 may also be used in the same material as the center pin 101, stainless, cobalt chromium, titanium alloys, ceramics and the like can be applied.

Hereinafter, a treatment method using the treatment apparatus according to the present invention will be described.

First, Figures 3 to 5 are views for explaining the treatment method of the present invention, the femur neck 205 is located at the lower end of the femoral head 203, as shown in Figure 3, extending from the femoral oral 205 The great trochanter 209 and the small trochanter 207 are located at the upper and lower ends of the femur. Here, when the necrotic site occurs at any position of the femoral head 203, the operator secures a surgical position opposite to the necrotic site.

The procedure position is such that there is no damage to the outer circumference of the femoral neck 205, and therefore, it is preferable to set the position via the center of the necrotic part and the femur neck as the procedure point. As such, when the procedure point is set, the center pin 101 performs the drill drilling 211 for entering the necrotic part using the drill handpiece. Drill drill 211 is the diameter of the drill is determined so that the center pin 101 corresponds to the diameter of the drill that can be pressed into the femur.

On the other hand, as shown in Figure 4 when the drill perforation 211 is formed from the outer circumferential surface of the femur head to the necrotic part of the femoral head 203, the center pin 101 described above is installed to guide the drill perforation 211. Here, considering that the distance from the outer circumferential surface of the femur to the femoral head is about 9 cm to 10 cm, and since the length of the center pin 101 is 12 cm to 15 cm, the center pin 101 is about 5 cm to the outer circumferential surface of the femur. Make it protrude about 7cm.

After the center pin 101 is inserted into the femoral head 203, the operator mounts the central pressure reducer 120 on the drill handpiece as the second mechanism. The drill handpiece has a drill chuck for fastening the central pressure reducer 120, and fixes the fastening protrusion 105 of the central pressure reducer 120 with the drill chuck. Here, since the center pin 101 should be drawn out to the guide hole 111 formed at the center of the fastening protrusion 105, the drill chuck allows the fastening protrusion 105 to be fastened at right angles. Drill handpiece that can be applied to this has been used in a number of existing medical devices, a detailed description thereof will be omitted.

When the central pressure reducer 120 is mounted on the drill handpiece, the front end of the cylindrical housing 103, that is, the center pin 101 is received by the opening surface of the cylindrical container 103 in which the saw 107 is formed. do. In this case, as the center pin 101 protrudes a predetermined distance from the femur, the center pin 101 passes through the extraction hole 109 of the cylindrical housing 103 to the front end of the guide hole 111. It is in a pulled-in state. Then, when the drill handpiece is driven, the cylindrical housing 103 is guided by the center pin 101 introduced into the guide hole 111 to rotate at a set RPM.

Cylindrical body 103 that is rotationally driven saws the femur according to the guide of the center pin 101. As shown in FIG. 5, the cylindrical housing 103 enters the femoral ball 203 along the center pin 101 based on the rotational force of the saw 107. For this reason, the sawed femur is inserted into the extraction hole 109 of the cylindrical container 103 and is loaded. The loaded femur has a cylindrical structure in which the center is perforated by the center pin 101. Here, the operator must recognize the distance that the cylindrical housing 103 of the central decompressor 120 enters the femur. For this purpose, a numerical value that can indicate the capacity or the entry distance to the outer circumferential surface of the cylindrical housing 103 is provided. It will be preferred to be described.

The operator extracts the femur at predetermined lengths based on these values, for example, extracting the femur cells at 1 cm to 2 cm. Preferably it is a unit of 1.5cm, the cylindrical housing 103 is entered by sawing the corresponding length to the femur. Here, in order to extract the femur 1.5cm, about 2cm of the cylindrical housing 103 enters, and about 1.5cm of the femur is drawn out using a harvester.

Here, the harvester is a surgical instrument for extracting the femur. As shown in FIG. 6, the harvester 301 has a hollow structure of a hexagonal column, and both ends thereof are opened and the sawed femur is diffracted on the outer circumferential surface thereof. A cutting enclosure 321 of a metal material for drawing out a part of the femur, a sight hole 323 for visually recognizing the capacity of the drawn femur by being installed close to the shear opening of the cutting enclosure 321, and the cutting enclosure ( And a pusher 331 for pressurizing and discharging the femur drawn out and drawn out to the other end of the opening 321. In addition, the push rod 331 is a pressure body (337) for pressing the femur, an extension body 335 extending from the pressure body (337) flows along the interior of the cutting enclosure 321, the extension body ( 335 is formed on the end of the extraction head 333 for pressing the drawn femur bone.

As described above, the harvester 301 is inserted into the cutting compartment 321 of the harvester 301 along the cutting space of the femur sawsaw circularly by the saw 107 of the central pressure reducer 120 do. Here, the cutting enclosure 321 receives a part of the femur, and the inner circumferential surface of the cutting enclosure 321 is in contact with the outer circumferential surface of the femur. That is, the front end of the cutting enclosure 321 is introduced into the cutting space as shown in FIG. This is because the cutting enclosure 321 is fitted to a part of the femur, the operator diffracts the cutting enclosure 321.

For this reason, a part of the femur is a frictional force caused by diffraction force from the inner peripheral surface of the cutting enclosure 321, so that a part of the sawed femur is cut. The femoral cell to be cut in this way is approximately 1cm to 2cm is appropriate, and keeps the state introduced into the inner space of the cutting compartment 321. Therefore, the operator spaces the harvester 301 from the femur, and then presses the pressure body 337 to discharge the femoral cells introduced into the cutting enclosure 321 to the outside.

Thereafter, the operator inserts the central pressure reducer 120 into the cutting space to perform repeated sawing as described above, and also cuts and pulls out a part of the sawed femur using the harvester 301. This repeated procedure is performed until the necrotic site is reached, and cutting and extracting 7 to 8 femoral cells.

On the other hand, another embodiment of the present invention can be different in the structure of the harvester 301, which is the same principle and method of cutting the femur cell, but to facilitate the procedure due to structural deformation. That is, as shown in Figure 8, is introduced into the femur along the path punctured by the cylindrical housing 103, accommodates the end of the femur, transparent tube 303 of the transparent material, both ends open The head 307 for winding the end of the received femur is provided and has a handle 309 at the other end, and consists of a withdrawal pipe 305 flowing along the inner circumferential surface of the transparent tube 303. Here, the head 307 is formed with a through hole 313 through which the center pin 101 penetrates to the center, and has a hemispherical cross-section 315 having a hemispherical cross section around the through hole 313. ) Is provided. A support guide 311 is formed at the end of the transparent tube 303 facing the handle 309.

The harvester 301 configured as described above draws the transparent tube 303 along the groove formed by the cylindrical housing 103 when the cylindrical housing 103 is pulled out after a predetermined length of swing of the femur. Then, the handle 309 is pressed so that the end portion of the femur is pressed against the circular depression 315 of the head 307. 9, the edge of the femur end is pressed against the edge of the head 307, and the operator cuts the femur within the sawed range by rotating the handle 309. As described above, the cylindrical enclosure 103 is sawed about 2 cm, and then cuts 1 cm to 2 cm, preferably 1.5 cm, using the harvester 301. 10 is a cross-sectional view illustrating an operating state of the harvester 301.

On the other hand, the operator cuts the femur in about 1.5 cm units through such a method, and forms a plurality of cells, for example, seven or eight femur cells, and draws them out. Here, the sawed femur is inserted into the extraction hole 109 of the cylindrical enclosure 103 of the central pressure reducer 120. The operator withdraws the loaded loaded femur from the cylindrical housing 103. 11 shows the extracted femur cell (Cell) 401 as described above, and has a cylindrical structure in which a drill hole 211 is formed at the center thereof. In addition, the femoral cells 401 cut during the extraction process may be transplanted according to the extracted order and direction.

As described above, the cylindrical housing 103 repeatedly extracts the femur to the necrotic part of the femoral head 203 via the femur and passes through the necrotic part to reduce the necrotic part of the femoral head. The operator must induce self-bonding of the femur by implanting it back into the perforated space of the femur after the procedure of removing the necrotic portion of the depicted femur cell (some of the majority).

However, the femur cell 401 is formed with a diameter smaller than the diameter of the central pressure reducer 120 due to the thickness of the cylindrical housing 103. That is, part of the femur is exhausted due to the thickness of the cylindrical housing 103, the femur cell 401 has to be expanded in diameter to recover it. Assuming that the thickness of the cylindrical enclosure 103 is approximately 0.2 mm to 0.4 mm, preferably 0.3 mm, the diameter of the femur cell 401 should be increased by 0.6 mm.

In the present invention, a compression mechanism capable of expanding the diameter of the femur cell 401 is shown as in FIG. 12. First, as shown, the compression mechanism 501 is a lower compressor consisting of a seating panel 503 for seating the femur cell 401, a handle 505 extending from the seating panel 503, and The upper compressor having the same structure as the lower compressor and installed so as to be opposed to the 'X' shape around the hinge 511 is joined to the center of the seating panel 503 of the lower compressor, thereby flowing the flow of the femur cell 401. It includes a flow preventing pin 513 to prevent, the pinhole 515 formed in the upper compressor to face the flow preventing pin 513, is installed between each handle 505 of the lower compressor and the upper compressor of the handle It consists of a fastening means 507 for holding the pressing force and the pressure release means 509 for releasing the pressing force of the handle.

The fastening means 507 and the pressure release means 509 may be used a conventional locking structure and the locking release structure, in the present invention, as shown in Figure 13 the first locking projection extending inwardly from the handle of the upper compressor A plurality of gear nets 531 are formed on the outer side of the 521, and a supporting rod 525 having a pivoting hinge 527 is formed at a predetermined position of the lower compressor corresponding to the first locking projection 521. The second locking protrusion 523 rotated by a predetermined angle by the pivoting hinge 527 includes a gear net 531 'such that the second locking protrusion 523 is opposed to the first locking protrusion 521, and the second locking protrusion 523 The second locking protrusion 523 is pivotally controlled from the release handle 529 extending perpendicular to the vertical direction.

The release handle 529 is equipped with a leaf spring (not shown) between the lower compressor around the pivoting hinge 527 to maintain a lock state between the lower compressor and the upper compressor. In addition, the outer circumferential surface of the seating panel of the upper compressor may include a departure prevention guide 517 for preventing the departure of the femur cell 401, the departure prevention guide 517 is preferably a tooth form formed along an arc. something to do.

The compression mechanism 501 is configured to expand the diameter of the femur cell 401 described above, and seats one femur cell 401 with the seating panel 303 of the lower compressor. At this time, as the perforated femur cell 401 is formed in the center, the flow preventing pin 513 of the seating panel 303 is introduced into the perforated space in the femur cell 401. In addition, at the upper end of the seated femur cell 401, a departure prevention guide 517 formed of a seating panel of the upper compressor is located, and the departure prevention guide 517 is a femur cell 401 in a pressurized state of the femur cell 401. ) To prevent the departure.

Thereafter, the operator winds and presses the handles 505 of the upper compressor and the lower compressor, which causes the gear nets 531 and 531 'of the first locking protrusion 521 and the second locking protrusion 523 to be caught. By operation, the gears are fastened to each other. Here, as the leaf spring presses the release handle 529 inwardly, the pressing force between the handles 505 is not released. The operator keeps pressing the femur cell 401 for a predetermined time based on the operation.

The compression mechanism 501 is preferably retained at least one or more during the procedure, it will be desirable to reduce the procedure time by holding as many as the number of femoral cells (401). Although the compression time of the femur cell 401 is inversely proportional to the pressing force of the compression mechanism 501, the diameter of the femur cell 401 may be expanded based on the pressing force of about 10 to 20 minutes.

Therefore, if the diameter of the femur cell 401 has been extended to reach the desired value, the operator releases the pressing force in the compressed state by using the depressurization means 509 of the compression mechanism 501. This pressurizes the release handle 529 provided as the lower compressor to outward, and the second locking protrusion 523 is rotated outward in cooperation with the release handle 529. Accordingly, the gear net 531 ′ of the second locking protrusion 523 is separated from the gear net 531 of the first locking protrusion 531, and the seating panels 503 of the compression mechanism 501 are spaced apart from each other.

After expanding the diameter of the plurality of femur cells 401 according to the above procedure, the femur cells 401 are introduced into the perforated femur in the reverse order of withdrawal. The femur cell 401 is an expanded state, similar to the perforation diameter of the femur, the insertion process will be forced fit, which promotes bone self-bonding. As such, when all the extracted femoral cells 401 are drawn in and the patient is sutured, the procedure is completed. In addition, when the self-coupling force is low depending on the patient, of course, bone cement may be appropriately used in the insertion process of the femur cell 401.

As described above, the surgery using the apparatus for using the femoral head avascular necrosis according to the present invention, unlike the conventional surgical procedure, to reinsert the hip bone of the patient into the hollow joint of the hip joint drilled to increase the patient's adaptability after surgery In addition, the procedure is simplified and the operation time is reduced. Therefore, the femoral head avascular necrosis procedure apparatus proposed in the present invention can be greatly promoted for the development of the medical industry, and it is judged that the industrial use value is sufficiently high.

Claims

In the surgical instrument for the use of the femoral head avascular mass for central decompression,

A center pin pressurized to the necrotic portion of the femoral head and having a needle bar structure having a predetermined diameter and length;

The center is guided by the center pin, one end is mounted to the drill handpiece and the other end is made in the form of a cylindrical saw, the central decompressor for sawing (sawing) by a predetermined distance unit from the surface of the femur to the necrotic part of the femoral head Core Deccompressor;

A harvester which is inserted into the femur along the perforation formed by the saw, and then winds up the end of the sawed femur and extracts it; And

The femoral head avascular necrosis procedure apparatus, characterized in that the compression mechanism is expanded to pressurize the femur cell to expand the diameter so as to re-introduce the femur cell extracted from the harvester to the punctured position.
The method of claim 1,

The center pin is,

In order to minimize the ductility in the manufacturing process, it is made of a material of any one of stainless steel, cobalt chromium, titanium alloys and ceramics.
The method of claim 1,

The central pressure reducer,

A hollow structure having a predetermined diameter and length is formed in the lower end of the cylindrical body formed with the extraction hole for extracting the hip bone, the front end of the cylindrical body is a saw for forming a perforation in the femur, is formed at the rear end of the cylindrical body It consists of a fastening protrusion fastened to the drilling handpiece, extending inward from the fastening protrusion to form a guide hole for guiding the center pin, the guide hole is characterized in that it has an extended structure with the extraction hole Avascular massaging instrument.
The method of claim 3, wherein

The central pressure reducer is made of any one of stainless steel, cobalt chromium, titanium alloy and ceramic;

The cylindrical container is a femoral head avascular necrosis surgical instrument, characterized in that provided with a measuring means capable of displaying the dose or distance in the longitudinal direction.
The method of claim 1,

The harvester,

It has a hollow structure of polygonal pillars, and both ends are open and the saw blades are diffracted on the outer circumferential surface to cut out part of the femur. A surgical instrument for visual recognition, femoral head avascular necrosis treatment instrument, characterized in that made of a push rod for ejecting and ejecting the femur drawn out to the other end opening surface of the cutting chamber to the outside.
The method of claim 5,

The push rod,

A pressurized body for pressurizing the femur, an extended body which extends from the pressurized body and flows along the inside of the cutting enclosure, and a pullout head which is installed at an end of the extension body and presses the drawn femur Equipment for the use of head avascular masses.
The method of claim 1,

The harvester,

It is introduced into the femur along the path punctured by the central decompressor to accommodate the end of the femur, and a transparent tube of both ends is opened, and a head for winding the end of the received femur with one end is provided with a handle at the other end. Is provided, the femoral head avascular necrosis surgical instrument, characterized in that consisting of the withdrawal tube flowing along the inner peripheral surface of the transparent tube.
The method of claim 7, wherein

The head is

A through hole for penetrating the center pin is formed in the center, and a circular depression having a hemispheric cross section is provided around the through hole, and a support guide is formed at the end of the transparent tube facing the handle. Femoral head avascular incision apparatus for use.
The method of claim 1,

The compression mechanism,

It consists of a seating panel for seating the femur cell, a lower compressor consisting of a handle extending from the seating panel, and an upper compressor having the same structure as the lower compressor and installed in an 'X' shape around the hinge. under;

A flow preventing pin joined to a center of a seating panel of the lower compressor to prevent the flow of the femur cell, and a pin hole formed in the upper compressor to face the flow preventing pin;

A femoral head avascular necrosis surgical instrument is provided between the lower compressor and the handle of each of the upper compressor is composed of a fastening means for maintaining the pressing force of the handle and the pressure release means for releasing the pressing force of the handle.
The method of claim 9,

The outer circumferential surface of the seating panel of the upper compressor is further included a departure prevention guide for preventing the departure of the femur cell, the departure prevention guide is characterized in that the serrated head avascular necrosis used, characterized in that the tooth is formed along the arc.
The method of claim 9,

The fastening means and the pressure release means,

A plurality of gear nets are formed on the outer surface of the first locking projection extending inwardly from the handle of the upper compressor, a support rod having a pivoting hinge is formed at a predetermined position of the lower compressor corresponding to the first locking projection, The second locking protrusion is rotated a predetermined angle by the pivoting hinge includes a gear net so as to face the first locking projection, wherein the second locking projection is pivotally controlled from the release handle extending perpendicular to the second locking projection Equipment for the use of head avascular masses.
The method of claim 11,

The release handle,

A leaf spring is mounted between the lower compressor around the pivoting hinge to maintain a lock state between the lower compressor and the upper compressor.