CN211270994U - Femur osteotomy positioning guider - Google Patents

Abstract

The utility model discloses a thighbone cuts bone positioning guide for connect thighbone excision protection piece and distal end alignment positioner. The femoral osteotomy positioning guide includes a guide body, a slide, a connector, and a locking member. The guide body has a guide rod at its bottom for connection to the distal alignment fixture, a slider slidably connected to the guide body, a connector mounted to the rear of the slider for connection to the femoral resection block, and a locking member rotatably connected to the slider. The femoral resection positioning guide and the femoral resection protection block can be locked or unlocked mutually by operating the locking piece to rotate relative to the sliding piece. The utility model discloses a thighbone cuts bone positioning guide with distal end alignment positioner convenient and fast ground be connected to thighbone resection protection piece on, connect accurate reliable for distal end alignment positioner can effectively carry out high-efficient location to thighbone resection protection piece, and positioning accuracy is high repeatedly, has guaranteed different patient's operation effect.

Description

Femur osteotomy positioning guider

Technical Field

The utility model relates to the field of medical equipment, concretely relates to thighbone cuts bone positioning guide ware.

Background

In the orthopedic diagnosis, many patients need to undergo osteotomy due to injury to the bones of the human body or other pathological deformities of the bones caused by various accidents.

In the case of a knee joint, a prosthetic knee joint is generally installed after a diseased portion is removed by cutting a bone of a patient. Knee replacement osteotomies generally include distal femoral osteotomies, proximal tibial osteotomies, condylar osteotomies, patellar osteotomies, and the like. Because the bone of the distal femur needs to be cut off during the operation, and the cut-off shape is matched with the needed position of the plant prosthesis.

The osteotomy positioning device in the prior art has a complex structure and great operation difficulty. Therefore, there is a great need in the art to develop a new device that is simple in structure and easy to operate, so as to improve the efficiency of the surgery.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a thighbone cuts bone positioning guide for connect thighbone excision protection piece and distal end alignment positioner, in order to solve the problem that exists among the above-mentioned prior art.

In order to solve the above problem, according to an aspect of the present invention, there is provided a femoral resection positioning guide for connecting a femoral resection protection block and a distal alignment positioning device, wherein the femoral resection positioning guide includes:

a guider main body, the bottom of the guider main body is provided with a guide rod to be connected with the far-end aligning and positioning device, and a connecting piece,

a slider slidably coupled with the guide body,

a connecting member mounted to a rear portion of the slider and for connecting the femoral resection protection block, an

A locking member rotatably coupled to the sliding member, wherein

The femoral resection positioning guide and the femoral resection protection block can be mutually locked or unlocked by operating the locking piece to rotate relative to the sliding piece.

In one embodiment, the guide body has a relatively wide bottom end and a relatively narrow top end, the bottom end being provided with a notch having a shape matching the shape of the tail of the slider to receive the tail of the slider.

In one embodiment, the left side and the right side of the notch are provided with guide rod mounting holes, and the top end of the guide rod is accommodated in the guide rod mounting holes and fixedly connected with the guider main body.

In one embodiment, a sliding groove extending in the front-rear direction is provided on the guide body in front of the notch, the sliding groove being adapted to cooperate with a sliding rail of the sliding member, so that the sliding member is slidably coupled to the guide body.

In one embodiment, the femoral osteotomy positioning guide further includes a limiting member, a pin hole perpendicular to the bottom of the sliding groove and used for mounting the limiting member is disposed at the front end of the sliding groove, a limiting groove is disposed at the bottom of the sliding rail of the sliding member, and the limiting member is engaged with the limiting groove.

In one embodiment, the guider body is further provided with scales, and the scales are arranged on two sides of the sliding groove.

In one embodiment, both sides of the chute are further provided with a shaped hole extending from a lower surface to an upper surface in a thickness direction of the guide body.

In one embodiment, the sliding member includes a main body portion and a sliding rail integrally extended from the main body portion, wherein the main body portion is formed with an opening in a direction opposite to the sliding rail, and the locking member is formed with a protrusion, and the shape of the opening matches with the shape of the protrusion at the bottom of the locking member, so that the protrusion of the locking member can be inserted into and received in the opening.

In one embodiment, the two sides of the opening form a baffle plate, the baffle plate is provided with a pin hole, the pin hole is matched with a pin shaft, and the pin shaft penetrates through the pin hole and then penetrates into the rotating hole of the locking member, so that the locking member is rotatably connected to the sliding member.

In one embodiment, a spring hole extending from top to bottom is formed in front of the opening, and the lower end of the spring is installed in the spring hole.

In one embodiment, the lower portion of the main body portion of the slider is provided with a connector mounting hole extending in the length direction of the slide rail, and the connector mounting hole is located below the slide rail.

In one embodiment, the connector includes a relatively larger diameter posterior portion that passes into the connecting hole of the femoral resection protection block and a relatively smaller diameter anterior portion that is fixedly mounted in the mounting hole of the slider.

Preferably, the length of the front portion is greater than the thickness of the body portion of the slider, so that the front portion passes through the mounting hole and protrudes from the surface of the body portion.

In one embodiment, the front part of the link member is provided with a fixing hole in the radial direction of the link member, which is engaged with a fixing pin fixing the spring, the fixing pin fixing the spring into the spring hole of the slider and further extending into the fixing hole.

In one embodiment, the sliding part is provided at two sides of the sliding rail of the sliding part, and the thickness of the sliding part is thinner than that of the main body part of the sliding rail, so as to be better matched with the sliding groove.

In one embodiment, the front end of the slide rail is provided with a projection projecting upward.

In one embodiment, a limiting groove extending along the length direction of the slide rail is formed in the bottom of the slide rail, and the limiting groove is matched with the limiting piece on the guider main body.

In one embodiment, the locking member has a rectangular parallelepiped-shaped body, and a projection is integrally projected downward from a bottom surface of the body, and the projection is shaped to match the opening of the slider so as to be received in the opening.

In one embodiment, the protrusion is provided with a rotation hole in a width direction, and the rotation hole is disposed at a bottom of the protrusion and is matched with a pin hole of the sliding member to penetrate a pin shaft, so as to rotatably interconnect the locking member and the sliding member.

In one embodiment, a locking part is arranged behind the bottom surface of the locking part main body, the locking part integrally extends downwards from the bottom surface of the locking part main body and is matched with a locking groove of the femoral osteotomy protection block so as to mutually lock the guider and the femoral osteotomy protection block.

In one embodiment, the upper surface of the retaining member body is provided with a plurality of spaced recesses and projections to increase the friction of the fingers against the surface during manual manipulation.

In one embodiment, the locker body is further provided with a spring fixing hole extending from an upper surface to a lower surface of the locker body to receive a spring pin fixing the spring.

The utility model discloses a thighbone cuts bone positioning guide with distal end alignment positioner convenient and fast ground be connected to thighbone resection protection piece on, connect accurate reliable for distal end alignment positioner can effectively carry out high-efficient location to thighbone resection protection piece, and positioning accuracy is high repeatedly, has guaranteed different patient's operation effect.

Drawings

FIG. 1 is a perspective view of a femoral resection protection block.

Fig. 2 is a front view of the distal alignment positioning device.

Fig. 3 is an exploded perspective view of the femoral resection positioning guide of the present invention.

Fig. 4 is a perspective view of the femoral osteotomy positioning guide of the present invention.

Fig. 5 is an exploded perspective view of the guide body of the present invention.

Figure 6 is a front view of the sliding member, connecting member and locking member of the femoral resection positioning guide of the present invention.

Figure 7 is a front view of the sliding member and the connecting member of the femoral resection positioning guide of the present invention.

Figure 8 is a top view of the sliding member and the connecting member of the femoral resection positioning guide of the present invention.

Detailed Description

The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings so that the objects, features and advantages of the invention can be more clearly understood. It should be understood that the embodiments shown in the drawings are not intended as limitations on the scope of the invention, but are merely illustrative of the true spirit of the technical solution of the invention.

In the following description, for the purposes of illustrating various disclosed embodiments, certain specific details are set forth in order to provide a thorough understanding of the various disclosed embodiments. One skilled in the relevant art will recognize, however, that the embodiments may be practiced without one or more of the specific details. In other instances, well-known devices, structures and techniques associated with this application may not be shown or described in detail to avoid unnecessarily obscuring the description of the embodiments.

Reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Thus, the appearances of the phrases "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

In the following description, for the sake of clarity, the structure and operation of the present invention will be described with the aid of directional terms, but the terms "front", "rear", "left", "right", "outer", "inner", "outer", "inward", "upper", "lower", etc. should be understood as words of convenience and not as words of limitation.

In some surgical procedures, bone is cut off from the distal portion of the femur, and the cut-off shape is matched to the position of the plant prosthesis. The utility model discloses the people is through extensive and intensive research, from the angle that makes things convenient for medical worker to use, a simple structure's osteotomy locating component has been developed for the first time, this subassembly includes thighbone excision protection piece, thighbone osteotomy locating guide and distal end alignment positioner, this three part is connected through spring buckle respectively, mode detachably fixed connection such as locating pin screw thread locking connection, it is ingenious to conveniently dismantle and cooperate, can ensure that thighbone excision protection piece mounted position is correct, and ensure the uniformity that traditional chinese medical therapist used the apparatus gimmick to patient in the operation.

In the osteotomy positioning assembly, the femur resection protection block is fixed in the femur to resect the unnecessary part of the femur according to a predetermined groove shape, and the femur resection positioning guide and the distal end alignment positioning device are used as a guide rotation device to match with the parallel vertical lines. Among them, the femoral resection protection block as shown in fig. 1 is the most important part because it is required to cut off unnecessary parts according to a predetermined groove shape after it is fixed in the femur. And the other two assemblies are guiding rotating devices matched with the parallel vertical lines.

As used herein, the term "distal" refers to a portion of a femur that needs to be resected. As used herein, the terms "stand wire" and "stand wire rod" are used interchangeably to refer to a linear instrument that is used externally by a surgeon. The vertical line is used to match the angle of the femur if the instrument is installed correctly.

The thread erecting rod is a rod-shaped object matched with the far-end aligning device, one end of the thread erecting rod can be made into a pointed end which is convenient to insert into the far-end aligning device, and threads matched with the far-end aligning device can be arranged on the thread erecting rod.

The sequence in the operation is that after the vertical line rod is inserted into the distal end aligning and positioning device, the femur resection protecting block 300 of fig. 1 is connected with the femur osteotomy positioning guide 100 of the present invention by adjusting the required angle, and then inserted into the distal end aligning and positioning device 200 of fig. 2.

The femoral resection protection block 300 shown in fig. 1 is then secured to the patient's femur by the locating pins so that the surgeon can find the desired angle to resect the distal portion of the femur. The angle of the vertical line rod is matched in a rotating mode, and the right installation position of the femur resection protection block is ensured through the matching connection of the spring buttons.

In the operation process, firstly, the function of cutting the bone is ensured, screw holes at different positions are arranged in the femur resection protection block, and the instrument is adjusted, meanwhile, the accurate positioning can be realized, and the stability of the femur resection amount in the operation is ensured. Alignment pin holes and saw cuts in osteotomies are important structures in surgery. Wherein the positional accuracy of the saw grooves is high. In order to ensure the rotation fit of the vertical line angle, the alignment positioning device of the distal end of the femoral osteotomy is utilized to ensure that the vertical line rod can rotate to a certain position. Meanwhile, the matching characteristic precision is very high, and a stable and accurate connection mode can be achieved each time. In order to ensure that the connection is quick and convenient, the utility model discloses a thighbone cuts bone positioning guide, ensures to connect the accuracy, and the cooperation precision is high.

Fig. 1 is a perspective view of a femoral resection protection block, fig. 2 is a front view of a distal alignment fixture, as shown in fig. 1-2, the femoral resection positioning guide 100 of the present invention is used to connect the femoral resection protection block 300 shown in fig. 1 and the distal alignment fixture shown in fig. 2.

The present invention of the femoral resection positioning guide is described in detail below with reference to figures 3-7.

Fig. 3 is an exploded perspective view of the femoral resection positioning guide of the present invention, and fig. 4 is a perspective view of the femoral resection positioning guide of the present invention. As shown in fig. 3 and 4, the femoral resection positioning guide 100 generally includes a guide body 10, a slide 20, a connecting member 30, and a locking member 40. The guide body 10 is provided at the bottom thereof with a guide bar 11 to be coupled with the distal alignment fixture 200, the slider 20 is slidably coupled with the guide body 10, the connecting member 30 is installed at the rear of the slider 20 and serves to connect the femoral resection protection block 300, and the locker 40 is rotatably coupled with the slider 20. The femoral resection positioning guide 100 and the femoral resection protection block 300 can be locked or unlocked with respect to each other by rotating the locking member 40 with respect to the slide 20.

Fig. 5 is an exploded perspective view of the guide body 10 of the present invention. The guide body 10 of the present invention will be described in detail with reference to fig. 5. As shown in fig. 5, the guide body 10 has a generally trapezoidal shape with a relatively wide bottom end and a relatively narrow top end, the bottom end being provided with a notch 12, the shape of the notch 12 matching the shape of the tail of the slider 20 so as to accommodate the tail of the slider 20, as will be further described below.

Guide rod mounting holes 13 are formed in the left side and the right side of the notch 12, the top ends of the two guide rods 11 are respectively accommodated in the guide rod mounting holes 13 in the two sides of the notch 12 and fixedly connected with the guide main body 10, a sliding groove 14 extending in the front-rear direction is formed in the guide main body in front of the notch 12, and the sliding groove 14 is used for being matched with a sliding rail 22 of the sliding part 20 so as to slidably connect the sliding part 20 to the guide main body 10. The front end of the sliding chute 14 is provided with a pin hole 15 perpendicular to the bottom of the sliding chute 14, the pin hole 15 is matched with a limiting piece 151, and the limiting piece 151 is matched with a limiting groove at the bottom of the sliding rail 22 of the sliding piece 20, so that the sliding displacement of the sliding rail 22 along the sliding chute 14 is limited, and the sliding rail 22 cannot further slide forward along the sliding chute 14 and exceeds the foremost end of the guider main body 10.

The bottom of the chute 14 is also provided with four support holes 16 distributed symmetrically (only two support holes on one side are shown in the figure, and the other two support holes are hidden from view by the baffle above the chute). The support hole 16 is engaged with a support pin 161, and the support pin 161 is extended into the support hole from the bottom to the top and supports the bottom of the slide rail 21 and reduces friction between the slide rail and the slide groove.

With continued reference to FIG. 5, the guide body 10 is further provided with graduations 17, the graduations 17 being disposed on either side of the slot 14, the intraoperative graduations 17 indicating the degree of rotation of the guide body 17 relative to the femoral resection protection block. Thereby being convenient for doctors to more intuitively master the operation precision during operation. The slide groove 14 is also provided with a shaped hole 18 on both sides thereof, and the shaped hole 18 extends from the lower surface to the upper surface in the thickness direction of the guide body 10. The opposite-sex aperture 18 facilitates in operation to see from above whether the guide rod 11 is aligned with the guide aperture of the distal alignment positioning device, thereby facilitating insertion of the guide rod 11 into the guide aperture 210 of the distal alignment positioning device 200.

Fig. 6 is a front view of the sliding member, the connecting member and the locking member of the femoral resection positioning guide of the present invention, fig. 7 is a front view of the sliding member and the connecting member of the femoral resection positioning guide of the present invention, and fig. 8 is a top view of the sliding member and the connecting member of the femoral resection positioning guide of the present invention. As shown in fig. 6-8, the slider 20 generally includes a body portion 21 and a slide rail 22 integrally formed extending forwardly from the body portion 21. The main body portion 21 is generally rectangular or square and is formed with an opening 23 at the rear, the shape of the opening 23 matching the shape of the projection 41 at the bottom of the locker 40 so that the projection 41 of the locker 40 can be inserted into and received in the opening 22 at the rear of the slider 20.

The opening 23 is formed at both sides with a blocking plate 24, the blocking plate 24 is provided with pin holes 25, the pin holes 25 are engaged with the pin 251, and the pin 251 is inserted into the rotation hole 42 of the locker 40 after passing through the pin holes 25, thereby rotatably coupling the locker 40 to the slider 20. The front of opening 23 is equipped with from the top down extension spring hole 24, and spring hole 24 and spring 241 cooperation, and the lower extreme of spring 241 is installed in spring hole 24, and the upper end of spring 241 supports the bottom that leans on retaining member 40. As will be described in further detail below.

The lower portion of the main body portion 21 of the slider 20 is provided with a connector mounting hole 26 extending in the longitudinal direction of the slide rail 22, and the connector mounting hole 26 is located below the slide rail 22. The connecting member 30 is generally cylindrical and includes a relatively larger diameter posterior portion 31 and a relatively smaller diameter anterior portion 32, the posterior portion 31 being configured to pass into the connecting bore of the femoral resection block, and the anterior portion 32 being fixedly secured within the mounting bore 26 of the slider 20. Preferably, the length of the front portion 32 is greater than the thickness of the main body portion 21 of the slider 20, so that the front portion 32 passes through the mounting hole 26 and protrudes from the surface of the main body portion 21. Accordingly, a pin hole (not shown) is formed in the notch 12 of the guide body 10 to be engaged with the front portion 31 of the link 30, and the rear portion 31 of the link 30 passes through the mounting hole 26 of the sliding member 20 and extends into the pin hole of the link 30 to function to position the sliding member 20 and the guide body 10 with respect to each other.

In this embodiment, the front portion 32 of the link 30 is provided with a fixing hole 321 in the radial direction of the link, which is engaged with a fixing pin connecting the spring to be fixed, the fixing pin fixing the spring into the spring hole 24 of the slider 20 and further protruding into the fixing hole 321.

The sliding part 221 is provided on both sides of the slide rail 22 of the slider 20 to be engaged with the slide groove 14, and the thickness of the sliding part 221 is thinner than that of the main body of the slide rail 22, so that the sliding part can be engaged with the slide groove 14 better. A projection 222 projecting upward is provided at the front end of the slide rail 22. A stopper groove 223 extending in the longitudinal direction of the guide rail 22 is provided at the bottom of the slide rail 22, the stopper groove 223 is engaged with the stopper 151 of the guide body 10, and when the slide rail 22 of the slider 21 slides along the slide groove 14 of the guide body 10, the stopper 151 is engaged with the stopper groove 223 to perform stopper.

With continued reference to fig. 6-8, the locking member 40 has a rectangular parallelepiped-shaped body 44 with a projection 41 integrally projecting downwardly from a bottom surface of the body 43, the projection 41 being shaped to mate with the opening 23 of the slider 20 so as to be received within the opening 23. The protrusion 41 is provided with a rotation hole 42 in a width direction, and the rotation hole 42 is provided at the bottom of the protrusion 41 and engaged with the pin hole 25 of the sliding member 20 to penetrate the pin shaft 251, by installing the protrusion 41 of the locker 40 in the opening 23, and penetrating the pin shaft 251 into the pin hole 25 and the optional hole 42, thereby rotatably interconnecting the locker 40 and the sliding member 20.

The locking part 44 is provided at the rear of the bottom surface of the locker body 43, and the locking part 44 is a protrusion integrally protruded downward from the bottom surface of the locker body 43 in this embodiment, which is located at the side of the coupling 30 of the protrusion 41, and the locking part 44 is engaged with the locking groove of the femoral osteotomy protection block, so that the guide 100 can be locked to the femoral osteotomy protection block.

The upper surface of the locking member body 43 is provided with a plurality of grooves and projections arranged at intervals to increase the friction force between the fingers and the surface in manual operation, thereby playing a role of anti-slip. The locker body 43 is further provided with a spring fixing hole 46, and the spring fixing hole 46 extends from the upper surface to the lower surface of the locker body 43 to receive a spring pin (not shown) fixing the spring 241. The spring fixing hole 46 and the locking portion 44 are respectively located on the front and rear sides of the protrusion 41. When unlocking is required, the front part of the locking piece body 43 is pressed, the locking piece body 43 applies downward force to the spring 241 to overcome the elastic force of the spring 231 to contract, the locking piece 43 rotates around the pin shaft 251 with the bulge part 41 as a fulcrum, the locking part 44 is lifted upwards to be withdrawn from the locking groove 320 of the femoral resection protection block 300, and the whole guider 100 is pulled forwards to ensure that the connecting column 30 is withdrawn from the connecting hole 310 of the femoral resection positioning protection block 300 so as to separate the guider 100 from the femoral resection protection block 300.

When it is desired to couple the guide 100 to the femoral resection protection block 300, the femoral resection protection block is coupled and locked to the guide 100 by inserting the rear portion 31 of the coupling member 30 into the coupling hole 310 of the femoral resection protection block 300, and then pressing the locker body 43 to apply pressure to the spring 241 to force the spring 231 to contract against the elastic force of the spring, thereby lifting the locking portion 44 to be caught in the locking groove 320 of the femoral resection protection block 300. During surgery, the distal alignment fixture can be adjusted angularly by rotating it, at which point the scale 17 can indicate the angle of rotation.

The utility model discloses a thighbone cuts bone positioning guide with distal end alignment positioner convenient and fast ground be connected to thighbone resection protection piece on, connect accurate reliable for distal end alignment positioner can effectively carry out high-efficient location to thighbone resection protection piece, and positioning accuracy is high repeatedly, has guaranteed different patient's operation effect. Simultaneously, the position of the locking piece relative to the sliding piece can be adjusted, the rotated angle in the operation process can be indicated, meanwhile, the slidable connecting mode of the locking piece and the sliding piece and the visual matching operation of the guide rod and the guide hole bring great convenience for the operation.

The preferred embodiments of the present invention have been described in detail, but it should be understood that various changes and modifications can be made by those skilled in the art after reading the above teaching of the present invention. Such equivalents are intended to fall within the scope of the claims appended hereto.

Claims (22)

1. A femoral resection positioning guide for connecting a femoral resection protection block and a distal alignment positioning device, the femoral resection positioning guide comprising:

a guider main body, the bottom of the guider main body is provided with a guide rod to be connected with the far-end aligning and positioning device, and a connecting piece,

a slider slidably coupled with the guide body,

a connecting member mounted to a rear portion of the slider and for connecting the femoral resection protection block, an

A locking member rotatably coupled to the sliding member, wherein

The femoral resection positioning guide and the femoral resection protection block can be mutually locked or unlocked by operating the locking piece to rotate relative to the sliding piece.

2. A femoral resection positioning guide according to claim 1 wherein the guide body has a relatively wide bottom end and a relatively narrow top end, the bottom end being provided with a notch having a shape that matches the shape of the tail of the slide to receive the tail of the slide.

3. The femoral resection positioning guide of claim 2, wherein the notch is provided with guide rod mounting holes on the left and right sides, and the top end of the guide rod is accommodated in the guide rod mounting holes and fixedly connected with the guide body.

4. A femoral resection positioning guide according to claim 3 wherein the guide body anterior to the gap is provided with a sliding slot extending in an anterior-posterior direction for engagement with a sliding track of the slide so that the slide is slidably connected to the guide body.

5. The femoral resection positioning guide according to claim 4, further comprising a limiting member, wherein the front end of the sliding slot is provided with a pin hole perpendicular to the bottom of the sliding slot for mounting the limiting member, the bottom of the sliding rail of the sliding member is provided with a limiting groove, and the limiting member is engaged with the limiting groove.

6. The femoral resection positioning guide of claim 4, wherein the guide body is further provided with graduations disposed on both sides of the sliding slot.

7. A femoral resection positioning guide according to claim 4, wherein both sides of the sliding slot are further provided with a profiled hole extending from a lower surface to an upper surface in the thickness direction of the guide body.

8. A femoral resection positioning guide according to claim 4 wherein the slider includes a body portion and a track integrally formed extending from the body portion, wherein the body portion is formed with an opening in an opposite direction from the track, and wherein the retaining member is formed with a projection, the opening being shaped to match the projection of the base of the retaining member to enable the projection of the retaining member to extend into and be received within the opening.

9. The femoral resection positioning guide of claim 8, wherein the opening is formed at both sides with a blocking plate having a pin hole, the pin hole is engaged with a pin, and the pin is inserted into the rotation hole of the locking member after passing through the pin hole, thereby rotatably connecting the locking member to the sliding member.

10. The femoral resection positioning guide of claim 8, wherein the opening is forwardly provided with a spring hole extending from top to bottom, a lower end of the spring being mounted in the spring hole.

11. The femoral resection positioning guide of claim 8, wherein the lower portion of the body portion of the slider is provided with a connector mounting hole extending along the length of the slide rail, the connector mounting hole being located below the slide rail.

12. A femoral resection positioning guide according to claim 11 wherein the connector includes a relatively larger diameter posterior portion that passes into a connection hole of a femoral resection protection block and a relatively smaller diameter anterior portion that is fixedly mounted in the mounting hole of the slide.

13. A femoral resection positioning guide according to claim 12, wherein the anterior portion has a length greater than a thickness of the body portion of the slide such that the anterior portion passes through the connector mounting hole and projects above a surface of the body portion.

14. A femoral resection positioning guide according to claim 12, wherein the anterior portion of the connecting member is provided with fixation holes in a radial direction of the connecting member, the fixation holes cooperating with fixation pins for fixation of the spring, the fixation pins securing the spring within the spring hole of the sliding member and further extending into the fixation holes.

15. A femoral resection positioning guide according to claim 8, wherein the sliding track of the sliding member is provided at both sides thereof with sliding portions engaging with the sliding slots, the sliding portions having a thickness thinner than that of the main body portion of the sliding track so as to be better engaged with the sliding slots.

16. The femoral resection positioning guide of claim 8 wherein the anterior end of the slide is provided with an upwardly projecting projection.

17. The femoral resection positioning guide of claim 8, wherein the bottom of the sliding track is provided with a limiting groove extending along the length of the sliding track, and the limiting groove is matched with the limiting part on the guide body.

18. A femoral resection positioning guide according to claim 8 wherein the retaining member has a cuboid shaped body with a downwardly projecting projection integral with a bottom surface of the body, the projection being shaped to match the opening of the slide to be received therein.

19. A femoral resection positioning guide according to claim 18, wherein the protrusion is provided with a rotation hole in a width direction, the rotation hole being provided at a bottom of the protrusion and cooperating with the pin hole of the sliding member to penetrate a pin shaft to rotatably interconnect the locking member and the sliding member.

20. The femoral resection positioning guide of claim 18 wherein the locking member is integrally formed to extend downwardly from the bottom surface of the main body of the locking member and is configured to engage the locking groove of the femoral resection block to lock the guide to the femoral resection block.

21. A femoral resection positioning guide according to claim 18 wherein the upper surface of the body of the retaining member is provided with a plurality of spaced apart recesses and projections to increase the friction of the fingers against the surface during manual manipulation.

22. A femoral resection positioning guide according to claim 8 wherein the body of the retaining member is further provided with spring retaining apertures extending from the upper surface to the lower surface of the body of the retaining member to receive spring pins for retaining the springs.

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