JPH0975366A - Guide for drilling collum femoris part - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a guide for drilling the collum femoris part which does not require holding of a gage block by a hand and enables an operator to easily and efficiently set the exact insertion angle of guide pins and to hold the redressment section of a bone fracture as well. SOLUTION: This guide has a bar-shaped base body 1 which has an internal threaded part in the rear part and a hook-shaped hooking part 11 at the front end, a slide 2 which is slidable on this bar-shaped base body 1 via a shaft 3 screwed into the internal threaded part and a gate block 4 which is removably supported via a supporting shaft mechanism 5 at the slide 2 and the bar-shaped base body 1, has a tooth part 431 on the contact surface with the femur 9 and has oblique holes 410, 411 for insertion of the guide pins opened in this tooth part 431.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a femoral neck drill guide.

[0002]

2. Description of the Related Art As a method for treating fractures or cracks around the femoral neck, screw bolts such as a compression hip screw or a canceller screw are generally used between the femoral head and the neck of the femur. The method of tightening is adopted. Prior to such an operation, the skin of the femoral head is removed and a guide pin is inserted from below the greater trochanter of the femur to the center of the femoral head, but if the angle of the guide pin is not accurate, the screw bolt described above is used. The tightening effect of the class becomes insufficient.

As shown in FIG. 15, a conventional tool for setting the piercing angle of a guide pin generally has a structure in which a handle H is attached to a gauge block G having an oblique hole g at an angle of 130 to 150 °. It was target. However, in such a structure, since one surface of the gauge block G is simply applied to the outer surface of the femur, the gauge block G is not stable, and the position shifts even if a finger or the like comes into contact with it or vibration is applied. It is difficult to set the angle of the guide pin easily and accurately. Moreover, even when the guide pin is inserted at a fixed angle, the gauge block G must be firmly held in the femur with the hand, and therefore the gait pin cannot be inserted by itself, and at least the gait pin is inserted. There is a problem that a total of two staff members are required to operate and a staff member who holds the gauge block G, which makes the operation complicated and time-consuming.

[0004]

SUMMARY OF THE INVENTION The present invention was made by research to solve the above-mentioned problems, and its purpose is to eliminate the need to press the gauge block by hand. An object of the present invention is to provide a femoral neck drilling guide capable of accurately setting the guide pin insertion angle and inserting the guide pin easily and efficiently. Another object of the present invention is to provide a femoral neck perforation guide with high practicability, which can hold a reduction part of a fracture and can also remove periosteum.

[0005]

In order to achieve the above object, the present invention provides a bar-shaped base body having a female threaded portion at a rear portion and a hook-shaped hooking portion at a front end portion, and the bar-shaped substrate screwed into the female threaded portion. A slide capable of moving on the bar-shaped base body via a screw shaft, and the slide and the bar-shaped base body being detachably supported by a support shaft mechanism and having a tooth portion on a contact surface with a femur and a tooth. And a gauge block having a slanted hole for inserting a guide pin which is opened in the portion. Further, the femoral neck drilling guide according to the present invention preferably comprises a neck axial center confirmation jig separately from the guide body having the above-mentioned configuration, and the neck axial center confirmation jig is provided in the oblique hole. It has a first pin to be fitted and a second pin parallel thereto.
The hook-shaped hooking portion has a tooth portion that can be bite and locked on the surface of the femur, and has a blade portion for removing periosteum at the tip. The guide pin insertion sloping hole is preferably provided at two or more different angles, a rotation preventing hole is provided in the vicinity of the swash hole, and the rotation preventing stopper is provided on the first pin of the neck axial center confirmation jig. A piece having a detent pin that fits in the hole is attached. The cervical shaft center confirmation jig may be composed of two kinds, one for outer shaft center confirmation and the other for front shaft center confirmation, or it is composed of one kind and the first pin and the rotation stop pin can be displaced by 90 degrees. May be. Further, the present invention includes a belt-shaped plate that can be brought into contact with the front surface of the femoral neck between the bar-shaped base and the slide, and is tiltably supported.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an embodiment of a femoral neck drill guide according to the present invention in a single state, and FIGS. 2 to 6 show it in a used state. In FIG. 1, A is a guide body, and B ₁ and B ₂ are cervical axis center confirmation jigs. 2 to 4, 9 is a femur, 90 is a greater trochanter, 91 is a head, 92 is an outer surface, 93 is an inner surface, 94 is a front surface, 940
Is a front flat area, 95 is a rear surface, and D is a guide pin. The guide body A includes a bar-shaped base body 1, a slide 2, an advancing / retreating screw shaft 3, and a gauge block 4, and each of these members is made of a material having high strength such as stainless steel. As shown in FIGS. 3 and 5, the bar-shaped base 1 has a female screw hole portion 10 at the rear portion, and the tip end portion thereof is a hook-shaped hook portion 11 having a required curvature. The hook portion 11 is hooked on the inner surface 93 of the femur 9, and a tooth portion for engaging with the femur 9 or a friction coefficient increasing portion (hereinafter referred to as tooth portion) 110 is engraved on the surface and The tip of the hanging portion 11 is tapered to form a blade portion 111 for peeling off the periosteum. The bar-shaped base 1 is provided with an elongated hole 12 on the rear side in the axial direction with respect to the hook portion 11. The tooth portion 110 may be a ridge that runs in the width direction as shown in FIG. 8A, or may be one in which sharp protrusions having a pyramid shape are arranged vertically and horizontally as shown in FIG. 8B. The latter has a high anti-slip effect, so that the gauge block 4 and the hook portion 11 can be made to have a relationship in which they do not face each other.

The slide 2 is slidably arranged on the upper surface of the bar-shaped base 1, and the rear end portion 20 has a forward end of a screw shaft 3 for advancing and retracting which is threaded through the female screw hole portion 10 so as to be idle. ing. An operating handle 30 is provided at the rear end of the advancing / retreating screw shaft 3. As shown in FIGS. 2 and 3, the gauge block 4 has a flat trapezoidal shape having a flat rear end surface 40, inclined surfaces 41, 41 on both sides thereof, vertical surfaces 42, 42 and a front end surface 43, or a wide width similar thereto. It is made of a block, and the front end face 43 is hooked on the slide 2 by the hook portion 11.
It is arranged so as to confront. The front end surface 43 is provided with an enlarged portion 430 to stabilize contact with the femur 9, and the entire surface including the enlarged portion 430 includes the femur 9
A tooth portion or a friction coefficient increasing portion (hereinafter referred to as a tooth portion) 431 for biting and locking on the outer side surface 93 is engraved. A plurality of oblique holes 410, 411 for inserting the guide pin D toward the head 91 of the femur 9 are formed in a cross shape from the inclined surfaces 41, 41 to the front end surface 43.
The oblique holes 410 and 411 form at least two angles within the range of 130 to 150 °, for example, 135 ° and 145 °. These inclined holes 410 and 411 are formed on the inclined surfaces 4
1, 41 may be provided one by one, but in order to fit the left and right femurs, preferably two or three for each inclined surface 41, 41 as shown in FIGS. 6 and 7.
Provide each one. In the vicinity of the oblique holes 410 and 411, the rotation stopping holes 4 for the neck axial center checking jigs B ₁ and B ₂ are provided.
12, 412 'are drilled. Although the detent hole 412 ′ at the intermediate position is a long hole, it may be a separate hole.

The gauge block 4 is pivotally supported at its center portion in the width direction on the slide 2 and the bar-shaped base body 1 by a supporting shaft mechanism 5 so as to be swingable, and slides when necessary, that is, when the insertion of the guide pin is completed. It can be separated from 2. As shown in FIG. 6, the support shaft mechanism 5 includes a slide 2
The shaft 50 is fitted in the stepped hole 21 provided from the side opposite to the gauge block in a non-rotating state, and the shaft portion penetrates the long hole 12 of the bar-shaped base body 1 and is concentric with the first shaft 5a. Has a second shaft 5b for fastening which is inserted in a stepped hole 45 provided in the gauge block 4, and the first shaft 5a is screwed with a nut 5c via a washer to a male screw on the outer periphery of the tip. , The first shaft 5 by the pin 51 that laterally passes through the nut 5c.
a is locked out. A female screw hole 52 is formed on the first shaft 5a from the head to a required position. Second
The shaft 5b has a head portion 53 for turning at the rear end, and the male screw shaft portion 5
4 is screwed into the female screw hole 52 of the first shaft 5a to form the swing center of the gauge block 4. And
In order to prevent the second shaft 5b from being separated from the gauge block 4 and being lost when the second shaft 5b is loosened and retracted to separate the gauge block 4 from the slide 2, the stepped hole 45 has a second hole. An E-ring 5d that is fitted onto the shaft 5b is arranged.

In this embodiment, the guide body A further has a strip plate 6. The strip-shaped plate 6 functions as a contact plate and an angle confirmation indexing tool for making the guide pin D parallel to the cervical axis CL by contacting the flat region 940 of the front surface 94 of the femur neck, and the bar-shaped plate 6 Base 1
And the slide 2 and is prevented from coming off by the support shaft mechanism 5. That is, the strip-shaped plate 6 has a long hole 60 from the base end portion to the required length position, and the slide 2 has a contact surface with the bar-shaped substrate 1 wider than the width of the strip-shaped plate 6 as shown in FIG. A shallow groove 23 is provided. The strip-shaped plate 6 has a shallow groove 23 so that the first shaft 5a penetrates the long hole 60.
, And the portion beyond that extends obliquely outward as shown in FIGS. 1, 2, and 4. It is preferable that the strip plate 6 has a thickness dimension slightly larger than the depth of the shallow groove 23, so that the strip plate 6 does not inadvertently tilt when the second shaft 5b is screwed into the first shaft 5a. It can have an appropriate angle holding power.

Next, the cervical axis center checking jig B ₁ is for checking the front side axis, and the first pin 7a and the second pin 7b having the same diameter as the guide pin are arranged at predetermined intervals by the connecting piece 7c. And hold them in parallel. The first pin 7a is the second pin 7
Shorter than b, near the tip of the first pin 7a, a piece piece 7d having a small diameter anti-rotation pin 71 that fits into the anti-rotation holes 412, 412 'of the gauge block 4 has a push screw or the like. It is fixed so that its position can be adjusted. The piece piece 7d has a relationship in which its long axis is displaced by 90 degrees from the connecting piece 7c. The cervical axis center checking jig B ₂ is for checking the outer axis and has the same structure as the cervical axis center checking jig B ₁ except that the long axis of the piece 7d is the connecting piece 7c. They differ in that they have a parallel relationship. The neck axial center checking jig B ₂ may be omitted when the guide body A includes the strip plate 6 as described above. Figure 9 is connecting piece 7c and the first pin 7 in cervical axis confirmation jig B ₁ and the neck axis confirmation jig B ₂
a, the example of the connection of the 2nd pin 7b is shown, (a)
The square bar is used as the connecting piece 7c as shown in
The pin 7a and the second pin 7b may be inserted and fixed by the push screw 7h. In this case, the first pin 7a and the second pin 7b
The interval is fixed. In (b), a square bar is used as the connecting piece 7c, but the upper half is divided in half in the width direction to form a separating piece 74.
, Several holes 75 are formed at intervals at the boundary between the separation piece 74 and the base piece 73, and any of the holes 75 is selected to insert the second pin 7b, and the tightening screw 7
6 and 76 are fixed to the separating piece 74 and the base piece 73 by screwing. In this case, the distance between the first pin 7a and the second pin 7b can be adjusted arbitrarily. (C) is a simplified version of the cervical shaft center confirmation jig B ₁ and the cervical shaft center confirmation jig B ₂ , in which one wire is bent in a U-shape and the connecting piece 7c and the The first pin 7a and the second pin 7b are formed.

In FIG. 1, the cervical axial center checking jig B ₁ and the cervical axial center checking jig B ₂ are separate members.
The present invention is not limited to this, and a single jig B for checking the neck axis can be used.
₁ and the neck axial center checking jig B ₂ may be commonly used. This may be done by allowing the mounting angle of the first pin 7a with respect to the connecting piece 7c to be displaced by 90 degrees. FIG. 10 shows an example thereof, in which (a) is 90 around the outer circumference of the first pin 7a.
The depressions 77 and 78 are provided at intervals of one degree, and the connecting piece 7c is formed into the depression 7
A push screw 7h having a rod tip that selectively fits in 7, 78 is screwed. When the first pin 7a is rotated to align the recess 77 with the pressing screw 7h, the major axis of the piece piece 7d becomes parallel to the connecting piece 7c, and the jig B ₂ for axial center confirmation is obtained. See also 7
When 8 is matched with the push screw 7h, the long axis of the piece piece 7d is displaced by 90 degrees from the connecting piece 7c, so that it becomes the neck axial center checking jig B ₁ . (B) uses a ball 7f, a spring 7g, and a screw 7h in place of the push screw 7h.

Next, an example of performing a femoral neck fracture operation using the femoral neck punch guide according to the present invention will be described. First, a region appropriately below the greater trochanter 90 is deployed on the lateral surface 92 of the femur. In this state, the operation handle 30 is held and the guide body A is brought close to the above-mentioned portion. In this way, the bar-shaped substrate 1
The tip of the hook is a bent hook portion 11, and the tip of the hook portion 11 is a blade portion 111 having a reduced thickness. Therefore, without using a special peeling device,
As shown in FIG. 11, the blade 111 is applied to the cut portion and moved along the inner surface 93 from the outer surface 92 of the femur 9, so that the periosteum 96 in the guide pin insertion planned area can be peeled off.

When the hook portion 11 reaches the inner surface 93 of the femur while peeling off the periosteum in this manner, the operating handle 30
When is rotated, the slide shaft 3 and the gauge block 4 move on the bar-shaped base body 1 by the forward movement of the advancing / retreating screw shaft 3 and approach the outer side surface 92 of the femur. At this time, the first
Since the shaft 5a is guided by the long hole 12 of the bar-shaped base 1, the slide 2 moves accurately on the bar-shaped base 1, and the second shaft 5b supporting the center of the gauge block 4 is moved to the first shaft 5a. Since they are screwed together, the gauge block 4 also moves smoothly together with the slide 2. This way gauge block 4
The front end surface 43 of the contact portion is in contact with the outer side surface 92 of the femur along the axial direction, and by continuing the rotation of the operating handle 30, the hook portion 11 and the front end surface 43 approach each other while facing each other. 4 teeth 431 on the lateral surface 92 of the femur,
The guide body A is firmly fixed to the femur 9 because the respective 10 dig into the femur inner surface 93. Therefore,
After that, there is no effect even if the hand is removed from the guide body A and the operation field is removed.

When the guide body A is fixed as described above, the strip plate 6 is slanted upward from between the bar-shaped base 1 and the slide 2.
Are extended, and the flat region 940 of the front surface 94 of the femoral neck and the neck axis CL are substantially parallel to each other. Therefore, if the guide body A is set so that the flat surface 940 of the front surface 94 of the femoral neck comes into contact with the surface of the strip-shaped plate 6 in the thickness direction, the gauge block 4 can be easily installed as shown in FIGS. It can be positioned parallel to the cervical axis CL. Since the strip-shaped plate 6 has a long hole 60 in the longitudinal direction through which the first shaft 5a passes, by appropriately loosening the second shaft 5b, the length of the femur of the patient can be quickly adjusted and the front surface 94 of the femoral neck 94 can be obtained. The length of protrusion from the guide body A can be adjusted so as not to come into contact with the concavo-convex region.

Since the temporary setting of the gauge block 4 is completed in this state, the guide pin D can be inserted into the head 91 by selecting the oblique holes 410 and 411 of the inclined surface 41, but more accurate insertion is possible. To set the angle of incidence, as shown in FIG. 12, a cervical axial center confirmation jig B ₁ may be attached to the guide body A to adjust the fixed position with respect to the femur. That is, the first pin 7a protruding from the piece 7d is attached to the inclined surface 4
1 into the desired slanting hole 410 or 411, the detent pin 71 into the detenting hole 412 or 412 'near the slanting hole 410 or 411, and the piece piece 7d into the inclined surface 4
Abut 1. In this way, the second pin 7b is located above the front surface of the femur. This state is FIG. 12A, in which the first pin 7a and the second pin 7b are displaced,
Therefore, the axis of the first pin 7a corresponding to the guide pin does not match the neck axis CL. To fix this,
The operation handle 30 is slightly rotated to loosen the tightening of the gauge block 4 to the outer surface 92 of the femur, and the first pin 7a and the second pin 7b are overlapped on the cervical axis CL as shown in FIG. 12 (b). The guide main body A may be finely moved in the axial direction of the femur so that the operating handle 30 is rotated and tightened. The fine movement operation can be performed easily and accurately while monitoring with an X-ray television or the like because the strip plate 6 is in contact with the flat area 940 of the front surface 94 of the femoral neck.

Since the piercing angle of the guide pin is accurately set by the above operation, the cervical shaft center confirmation jig B ₁ is then removed from the gauge block 4, and the first line is drawn as indicated by the phantom line in FIG.
The guide pin D is inserted into the oblique hole 410 or 411 in which the pin 7a was inserted, and is inserted into the central portion of the head of the bone. As described above, the gauge block 4 has the hook portion 11 of the bar-shaped substrate 1.
The guide pin D can be inserted easily and accurately because it is firmly fixed to the femur by the cooperative pinching with. If the guide pin is inserted in this way, the position is confirmed with an X-ray television or the like, and then the guide body A is removed from the femur. FIG. 14 shows this stage. First, the second shaft 5b is loosened as shown in (a). In this case, FIG.
2nd shaft 5b is the female screw hole 5 of the 1st shaft 5a like the virtual line of
2, the tip reaches the stepped hole 45, and the gauge block 4 is separated from the slide 2. E-ring 5
Since d is engaged with the thread of the second shaft 5b, the second shaft 5b
Is not separated from the gauge block 4. Therefore, next, the gauge block 4 may be gripped and moved in the axial direction of the guide pin D as shown in FIG. 14B, and the gauge block 4 is pulled out from the rear end of the guide pin D. When the gauge block 4 is moved, the gripping force of the bar-shaped substrate 1 is lost, so that the bar-shaped substrate 1 can be removed from the femur with one touch. The separated bar-shaped substrate 1 and gauge block 4 are again brought into contact with the stepped hole 45 of the gauge block 4 on the head portion 50 of the first shaft 5a, and the second shaft 5b is rotated by a simple operation to again perform the operation shown in FIG. Such a set state can be set.

The rest of the surgical procedure is the same as the conventional one. The length of the guide pin D is measured using a guide pin depth gauge, the head of the bone is reamed and tapped with a reamer and a drill, and a hip screw is used with a wrench. Is screwed in and a side plate is attached to this, and compression is applied by an impactor, or a cortical screw is screwed through the lateral surface 92 of the femur to fix the side plate, and then compression is applied by an impactor.

When the strip plate 6 is not used,
Alternatively, in order to further improve the setting accuracy of the guide pin angle while using this, the long axis of the piece 7d is connected to the connecting portion 7c.
A cervical axial center confirmation jig B ₂ parallel to the above is used, and this is attached to the guide main body A, and the fixing position for the femur may be adjusted as shown in FIG. That is, in this case as well, the first pin 7a protruding from the piece 7d is inserted into the desired oblique hole 410 or 411 of the inclined surface 41, and the anti-rotation pin 71 is provided near the oblique hole 410 or 411. Four
12 or 412 'and the piece 7d is brought into contact with the inclined surface 41. In this way, the second pin 7b is attached to the outer surface 9 of the femur.
Located above 2. This state is shown in FIG.
At this time, the first pin 7a and the second pin 7b are displaced, and therefore the axis of the first pin 7a corresponding to the guide pin does not match the neck axis CL. To correct this, the operation handle 30 is slightly rotated to loosen the tightening of the gauge block 4 on the outer side surface 92 of the femur, and the first pin 7a and the second pin 7b are moved to the neck as shown in FIG. 13 (b). The guide body A may be finely moved in the circumferential direction of the femur so as to be overlapped on the axial center CL, and the operation handle 30 may be rotated and tightened. The fine movement operation can be performed easily and accurately while monitoring it with an X-ray television or the like.

When the cervical shaft center checking jig having the structure as shown in FIG. 10 is used, a push screw or a screw with the first pin 7a and the detent pin 71 inserted into the gauge block 4 is inserted. 7h is loosened to displace the connecting piece 7c by 90 degrees, and the push piece or the screw 7h is screwed in to make the piece piece 7
Since the relative orientations of d and the connecting piece 7c change, it is possible to confirm the front shaft and the outer shaft with one cervical shaft center confirmation jig. Further, the present invention can also function as a clamper for reducing and holding the fractured portion E when the fractured portion E of the femur is at the position shown in FIGS. 2 and 3. Further, if the tooth portion 111 of the hook portion 11 of the bar-shaped base 1 is sharpened, the hook portion 11 is engaged at a position appropriately deviated from the relationship directly facing the gauge block 4, that is, at the inner surface 93 of the femur closer to the femoral head. They can be fixed together, and the range of the clamper for holding the reduction of the fracture E can be expanded.

[0020]

According to the first aspect of the present invention described above, the guide main body A has the bar-shaped base body 1 having the female screw portion at the rear portion and the hook-shaped hook portion 11 at the front end portion,
A slide 2 movable on the bar-shaped base 1 via a screw shaft 3 threaded on the female screw part, and swingable and removable on the slide 2 and the bar-shaped base 1 via a spindle mechanism 5. Is supported by the tooth portion 43 on the contact surface with the femur 9.
1 and the gauge block 4 having the inclined holes 410 and 411 for inserting the guide pins which are opened in the tooth portion, the gauge block 4 has the hook-shaped hook portion 11.
It is firmly and stably fixed to the femur 9 by the cooperating clamping action with and, and there is no effect even if the hand is removed or the operation field is removed.
Therefore, it is possible to obtain an excellent effect that even one doctor can very easily perform the setting of the insertion angle of the guide pin D and the insertion operation which are important in the femoral neck fracture surgery. According to claim 2, since the hook-shaped hooking portion 11 has the tooth portion 110 that can be bite and locked on the surface of the femur and the blade portion 111 at the tip, the periosteum can be peeled off. The excellent effect that the femoral neck piercing work can be further facilitated is obtained.

According to claims 3 and 4, the guide body and the jig for checking the neck axis are used together, and the jig for checking the neck axis is the first pin 7a which is fitted into the oblique hole and Second parallel to
Since the pin 7b is provided, the excellent effect that the piercing angle of the guide pin can be easily and accurately matched with the neck axis is obtained. According to claim 5, the slide and the gauge block can be accurately moved back and forth on the bar-shaped substrate, and the gauge block can be easily separated from the slide and pulled out from the guide pin after the guide pin is inserted. Excellent effect can be obtained. Claim 6
According to this, since the strip plate 6 capable of contacting the front region of the femoral neck between the bar-shaped base body and the slide functions as an index of the angle of the front surface of the neck, the oblique hole for inserting the guide pin can be easily and easily formed. It is possible to surely make it parallel to the cervical axis, and it is possible to obtain a blunt effect that the piercing angle from the lateral surface can be made more accurate.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a femoral neck drill guide according to the present invention.

FIG. 2 is a side view showing a usage state of the femoral neck drill guide according to the present invention as viewed from the front side of the femur.

FIG. 3 is a side view showing the same usage state as seen from the back side of the femur.

FIG. 4 is a plan view showing the same usage state as seen from the lateral side of the femur.

FIG. 5 is a sectional view of FIG.

6 is a partially enlarged sectional view of FIG.

7 is a cross-sectional view taken along the line YY of FIG.

FIG. 8 is a front view of a main part of a bar-shaped substrate in the present invention.

FIG. 9 is a front view showing each embodiment of the shaft center confirmation jig in the present invention.

FIG. 10 is a partial cross-sectional view of a shared-type shaft center confirmation jig according to the present invention.

FIG. 11 is a partial sectional view showing an initial stage using the femoral neck drill guide of the present invention.

FIG. 12 is a side view showing an angle setting state using the femoral neck punch guide of the present invention.

FIG. 13 is a plan view showing an angle setting state using the femoral neck punch guide of the present invention.

FIG. 14 is a perspective view showing a detached state of the femoral neck piercing guide after inserting the guide pin.

FIG. 15 is a perspective view showing a conventional guide pin insertion angle setting tool.

[Explanation of symbols]

A Guide body B ₁ , B ₁ Neck shaft center confirmation jig D Guide pin 1 Bar base 2 Slide 3 Advance screw shaft 4 Gauge block 5 Spindle mechanism 5a 1st shaft 5b 2nd shaft 6 Strip plate 7a No. 1 pin 7b 2nd pin 9 femur 11 hook part 12 long hole 52 female screw hole 92 female side surface 93 outer side surface 93 inner side surface 94 front surface 110 tooth part 111 blade part 410,411 oblique hole 412, 412 'non-rotating hole 431 tooth part 6

Claims (6)

[Claims] 1. A bar-shaped base 1 having a female screw portion at the rear portion and a hook-shaped hooking portion 11 at the front end portion, and the bar-shaped substrate 1 via a screw shaft 3 screwed into the female screw portion.
The slide 2 which can be moved up, and the slide 2 and the bar-shaped base body 1 are detachably supported by the support shaft mechanism 5 and have a tooth portion 431 on the contact surface with the femur 9 and a tooth portion 43.
1. A femoral neck piercing guide, comprising: a gauge block 4 having oblique holes 410, 411 for inserting guide pins which are opened in 1. 2. The hook-shaped hooking portion 11 has a tooth portion 110 which can be bite and locked on the surface of the femur 9 and a blade portion 111 for peeling the periosteum at the tip. The described femoral neck piercing guide. 3. A neck axial center checking jig B ₁ is provided, and the neck axial center checking jig B ₁ is parallel to the first pin 7a fitted in the oblique holes 410 and 411. The femoral neck piercing guide according to claim 1, further comprising a second pin 7b. 4. The gauge block 4 is provided with slant holes 410 and 411 for inserting guide pins at two or more different angles, and a whirl-stop hole 41 is provided in the vicinity of the slant holes 410 and 411.
2,412 'are provided, and the cervical axis center confirmation jig B is provided.
₁ of the first pin 7a, the detent holes 412,41
The femoral neck piercing guide according to claim 3, wherein a piece 7d having a detent pin 71 that fits in 2'is attached. 5. A support shaft mechanism 5 has a first shaft 5a which is prevented from rotating by a slide 2 and penetrates a long hole 12 of a bar-shaped base body 1, and a female screw hole 52 of a first shaft 5a which penetrates the gauge block 4 in the thickness direction. The femoral neck perforation guide according to claim 1, further comprising a second shaft 5b screwed into the second shaft 5b, the second shaft 5b being retained by the gauge block 4. 6. The method according to claim 1, further comprising a bar-shaped plate 6 pivotally supported between the bar-shaped base 1 and the slide 2, the band-shaped plate 6 being capable of contacting the front surface region of the femoral neck. The described femoral neck piercing guide.