46 results about "Right lesser trochanter" patented technology

The invention relates to a support body in an expansion fixing whirlbone, which comprises a support main body and an internal expansion bolt, wherein the support main body is sleeved outside the internal expansion bolt; the top part of the support main body is arc-shaped; the support main body is provided with a radial expansion wing; the expansion wing is composed of a plurality of wing fins; an expansion gap is formed between each wing fin; the internal expansion bolt is provided with an expansion section; after the internal expansion bolt is arranged in the support main body, the expansion wing can be opened by the expansion section; and the support main body is in threaded connection with the internal expansion bolt. According to the invention, the support body is fixed below the whirlbone or is fixed in bone tissues around a femoral neck through the expansion of a partial structure after the support body is planted on a predetermined position below the collapsing position of the whirlbone; the support body disclosed by the invention does not need to make cortical bone on the lower part of a whirlbone greater trochanter as support mechanics basis; therefore, the support body can be relatively short so that a osteotomy space between the greater trochanter and a lesser trochanter is kept in a future total hip replacement without taking out the support body deliberately.

The invention relates to a measuring method for CT (Computed Tomography) scanning and postprocessing and aims to provide a three-dimensional method for measuring femoral head-neck spatial angles. The method comprises the following steps: enabling a measured person to lie on the back on an examination bed, and enabling the middle sagittal line of the human body to coincide with the middle line of the examination bed; carrying out continuous data acquisition on the human body by adopting multilayer spiral CT scanning to obtain a thin-layer sequence, wherein the scanning range is from the upper edge of acetabulum to the lesser trochanter of femur; reconstructing a hip joint three-dimensional image based on the thin-layer sequence by using a three-dimensional postprocessing program, and removing unrelated structures such as the acetabulum and the like to obtain a femur three-dimensional image; and measuring the femoral head-neck extraversion angle, postversion angle and subversion angle. The technical scheme of the invention has the characteristic that the surface anatomical structure of the three-dimensionally restructured femur is displayed clearly, the position can be easily regulated, and the femoral head-neck spatial angles can be precisely measured.

The invention relates to an intertrochanteric arc-shaped bone fracture plate, and belongs to the technical field of human in-vivo implantation materials. The intertrochanteric arc-shaped bone fracture plate is composed of a main plate and an arc-shaped plate, the arc-shaped plate is manufactured on one side of the main plate, the main plate and the arc-shaped plate are connected as a whole through a connecting arc face, locking holes are formed in the main plate and the arc-shaped plate, and the bone fracture plate and the thighbone are attached and fixed through screws. A hollowed-out structure is formed in the middle of the arc-shaped plate. The arc-shaped plate is added to one side of the main plate, semi-wrapping attachment supporting and fixing can be carried out on the thighbone, the fracture reduction effect and supporting force of the inner rear side of an intertrochanteric fracture and the firmness of the main plate are improved, and more than eight locking holes fixed to the whirlbone through the femur neck are provided to be selected. The application range is wide, the intertrochanteric arc-shaped bone fracture plate can be used for all stable and unstable intertrochanteric and subtrochanteric fractures, inside calcar femorale and lesser trochanter splintered fractures and femur neck fractures, the risks of coxa vara, nail breakage and plate breakage are effectively reduced, the treatment effect is improved, mounting is easy and convenient, and use is safe and stable.

The invention relates to a device (10) for fixing a femur in hip endoprosthetics, comprising a femur support (18), which has a bent hook part (36) that forms a supporting rest for the femur to be fixed, in the region between the greater trochanter and the lesser trochanter, and which has a shaft (38) connected to the hook part (36), a lever arm (20), which has a column (22) and a cantilever (24) having a receiving portion (26) for attaching the shaft (38), an adjusting device (28) attached to an operating table (12), and a retainer (30), which can be coupled to the adjusting device (28) and to which the column (22) of the lever arm (20) can be attached. The adjusting device (28) has a drive (32) for moving the column (22) in an adjustment plane, which is perpendicular to the lying surface (16) of the operating table (12) and parallel to the longitudinal direction of the operating table. The adjusting device (28) also has an axis of rotation (34) perpendicular to the adjustment plane, about which axis of rotation the retainer (30) can be rotated in the adjustment plane by means of the drive (32) in order to pivot the column (22).

The invention relates to a bone fracture plate with an arc-shaped plate, and belongs to the technical field of human body internal implantation materials. The bone fracture plate is formed by a main plate and the arc-shaped plate, the arc-shaped plate is manufactured on one side of the main plate, the main plate and the arc-shaped plate are in circular arc transition to form a whole, locking holes are formed in the main plate and the arc-shaped plate, a hollowed structure is formed in the middle of the arc-shaped plate, and the main plate and the arc-shaped plate are in circular arc transition to form the whole and fixedly attached to the thighbone through locking nails. According to the bone fracture plate, the arc-shaped plate is additionally arranged on one side of the original main plate, the thighbone can be supported and fixed in a semi-wrapped and attached mode, and the bone fracture reduction effect and the supporting intensity on the inner side of an intertrochanteric fracture and the firmness of the main plate are improved. The bone fracture plate is wide in application range and can be used for all the stable and unstable intertrochanteric and below-trochanter fractures and splintered fractures of inner-side thighbone calcars and lesser trochanters, the risks of coxa vara, nail breaking and plate breaking are effectively reduced, complications are reduced to the greatest extent, the treatment effect improved, and the bone fracture plate is easy and convenient to install and safe and stable in use.

The invention discloses an anatomical femoral trochanter locking steel plate, relates to the technical field of medical instruments, and aims to avoid the condition that the steel plate needs to be repeatedly bent for shaping before an operation and to simplify the operation. The main technical scheme is that the anatomical femoral trochanter locking steel plate comprises a trochanter part and a femoral part connected with the trochanter part, wherein the trochanter part is adaptive to the anatomical shape of the rear part of a human femoral trochanter, and the femoral part is adaptive to the anatomical shape of the rear part of a human femoral shaft; a big trochanter tongue flap, a small trochanter tongue flap, a first connecting part and a second connecting part are arranged on the trochanter part; the first connecting part is arranged between the big trochanter tongue flap and the small trochanter tongue flap; the second connecting part is arranged between the big trochanter tongue flap and the femoral part. The anatomical femoral trochanter locking steel plate is mainly used for fixing femoral trochanter fracture blocks.

The invention discloses a hollow lag screw guide pin aiming fixator for restoration of lesser trochanter of a thigh bone from a rear side. The hollow lag screw guide pin aiming fixator for restoration of lesser trochanter of the thigh bone from the rear side comprises an arc guide frame, wherein a restoration rack is arranged at one end of the arc guide frame; a combined sleeve which moves along the arc guide frame is arranged at the other end of the arc guide frame; the tail end of the restoration rack is connected with the arc guide frame; a restoration hook is arranged at the front end of the restoration rack; a limiting groove is formed in the restoration rack; the combined sleeve comprises an outer barrel and an inner barrel; the inner barrel moves in the outer barrel coaxially; pointed claws are respectively arranged at an outlet end of the inner barrel and an outlet end of the outer barrel; and when the combined sleeve moves along the arc guide frame, the pointed claws are always pointed to the circle center of the arc guide frame. during surgery, the hollow lag screw guide pin aiming fixator for restoration of lesser trochanter of the thigh bone from the rear side is inserted from the rear side, muscles are pushed away by the front arc-shaped restoration rack, the restoration hook hooks a fracture block of the lesser trochanter and drags to the rear lower direction, sliding of the aiming fixator can be avoided by the square limiting groove, and therefore, the restoration effect is direct and reliable.

The invention discloses a machine for fixing and repositioning fractured femur lesser trochanter. The machine for fixing and repositioning the fractured femur lesser trochanter comprises a prying deflector rod, an operating seat and a top compression rod, wherein the prying deflector rod is fixed with the operating seat; the top compression rod is parallel to the prying deflector rod and can connected with the operating seat in a telescopic mode; one end of the prying deflector rod is in a circular arc shape; a top compression block is arranged close to the circular arc shaped end of the top compression rod; the outer side of the top compression block is in a circular arc shape; a thread hole is formed in the prying deflector rod; a thread lead hole along the axial line direction of the prying deflector rod is formed between the thread hole and a circular arc shaped end face of the prying deflector rod; and a thread slot is formed in the outer side of the top compression block. The machine for fixing and repositioning the fractured femur lesser trochanter can reduce muscle incision face, lighten wounds of patients and reduce difficulty of lesser trochanter repositioning operation, and meanwhile, ensures that a secondary displacement does not occur due to loosing of the lesser trochanter in the drilling and the implanting steel needle or steel nail process, and improves success rates of an operation.

The invention provides a fusion femoral stem system. The system comprises a bent short handle, a fixing mechanism and a femur head prosthesis, and a conical connection body is arranged at one end of the bent short handle; the conical connection body is connected with a conical connection hole of the femur head prosthesis in a matched mode, the other end of the bent short handle is inserted into and extends into the medullary cavity below the lesser trochanter from the bone cutting surface of the femoral neck, and the bent short handle is fixedly connected with the greater trochanter through the fixing mechanism. The fusion femoral stem system has the advantages that after the whole system operation and the sclerotin on the periphery of the bone bed at the near end of the host thighbone completes ingrowth osseointegration, the applied mechanics influence of the remained femoral neck and the sclerotin close to the lesser trochanter and the greater trochanter is basically close to a pre-operation biomechanics state.

The invention provides a thighbone lesser trochanter fixing device used for clinical orthopedic surgery. The device comprises two handles which are connected through a hinge, wherein a first handle is arc-shaped on one side of the hinge and is linear on the other side of the hinge, the second handle is linear, an arc-shaped end of the first handle is provided with an arc-shaped cover, one end of the second handle is provided with an arc-shaped cover, the arc-shaped cover of the second handle and the arc-shaped cover of the first handle are arranged on the same side, an opening of one arc-shaped cover faces the other arc-shaped cover, a through hole is formed in each arc-shaped cover, a sleeve is installed in the through hole of the arc-shaped cover of the second handle, and one end of the first handle and one end of the second handle, away from the arc-shaped covers, are provided with limiting strips. The fixing devices can effectively fix the thighbone lesser trochanter, meanwhile can improve precision of punching of an electrical drill, and is beneficial for proceeding of an operation.

The invention discloses a fixing and binding band for femoral lesser trochanter bone fracture reduction. The band comprises a plurality of metal wires, the front and rear ends of the metal wires are woven to form binding band bodies, the middles of the metal wires are woven to form a fixing lantern ring, the binding band bodies are formed by twisting all the metal wires into a strand, the fixing lantern ring is formed by twisting the middle metal wires into two strands, and the metal wires are made of peptide alloy materials; a locking buckle is arranged on the binding band and comprises a main locking buckle body, the main locking buckle body is provided with two axial through holes, the inner side of the main locking buckle body is provided with four claws, and the binding band bodies atthe two ends are matched with the two through holes one to one; the cross section of the main locking buckle body is arc. The fixing and binding band has the advantages that the band is simple in structure and convenient to use and operate, the surgical traumas of patients are effectively alleviated, it is effectively ensured that the lesser trochanter cannot be displaced again due to binding looseness, the influence on the blood supply of the femoral shaft is small, the production cost is low, and the surgical cost of the patients is effectively reduced.

The invention provides a thighbone lesser trochanter fixator which comprises two linear type handles which are connected through a hinge, wherein the two linear handles are respectively provided with an arc-shaped cover, an opening of one arc-shaped cover faces the other arc-shaped cover, a through hole is formed in each arc-shaped cover, a sleeve is installed on the through hole of one arc-shaped cover, and one end of each linear handle, away from each arc-shaped cover, is provided with a limiting strip. The fixator can effectively fix the thighbone lesser trochanter, meanwhile can improve precision of punching of an electrical drill, and is beneficial for proceeding of an operation.

The invention discloses a femoral lesser trochanter fixing device for the clinical orthopedic surgery. The fixing device comprises a lower curved plate, wherein the front end of the upper end surfaceof the lower curved plate is provided with two first elastic bands opposite to each other in the left-right direction, and the rear end of the upper end surface of the lower curved plate is provided with two second elastic bands opposite to each other in the left-right direction, and hooks and loops are arranged on the upper end surfaces of the first elastic bands and the lower sides of the secondelastic bands. The side of the lower curved plate is provided with a ventilation groove, and two fixed rods opposite to each other in the front-back direction are arranged in the middle of the upperend surface of an upper curved plate. The fixing device is simple in structure and convenient to use and capable of avoiding the use of a handle to control the tightness, thereby avoiding adverse effects on drilling caused by the handle and ensuring normal operation of the drilling. A corresponding ventilation device is provided to avoid displacement of the fixing device caused by a large amount of sweat accumulation on the skin surface of a patient and ensure accuracy of the drilling position, so that injury that may be caused to the patient during the lesser trochanter fixing process is reduced.

The embodiment of the invention discloses a femoral marrow cavity type detection method and system, and the method comprises the steps: carrying out the X-ray detection of a hip joint based on deep learning, and obtaining the left and right femoral detection images of the hip joint; performing noise reduction processing on the left and right femur images to obtain left and right femur edge images; positioning straight line positions of the left and right femur edge images through a Hough straight line method, and fitting a femur marrow cavity central axis; cutting out the lower half part of the femur, and locating the isthmus area of the femur and the area 2 cm above a lesser trochanter; calculating a medullary cavity flicker index according to the length of the upper 2cm femoral section line and the length of the narrowest region of the femoral medullary cavity so as to judge the type of the femur according to the medullary cavity flicker index. The method does not depend on the threshold excessively, is more robust, and improves the detection speed while guaranteeing the precision.

The invention provides a system for customizing an individualized artificial total hip joint replacement operation femur preparation template. The system comprises a femur neck osteotomy guide plate, a femur prosthesis anteversion and lateral border guide plate, the interior surface of the femur neck osteotomy guide plate is matched with a femur head, a femur neck, and a femur intermediate zone between a greater trochanter and a lesser trochanter in anatomic shape, the femur neck osteotomy guide plate is provided with an osteotomy positioning groove, the bottom of the femur prosthesis anteversion and lateral border guide plate is matched with a femur neck osteotomy surface in shape, the femur prosthesis anteversion and lateral border guide plate comprises a body, a lesser trochanter positioning wing and a front side wing, the lesser trochanter positioning wing and the front side wing are arranged on the body, and the body is provided with an anteversion and lateral border guide groove. According to the invention, the position of the ideal artificial total hip joint femur prosthesis in a human body can be controlled accurately, and furthermore the operation effect can be improved.

The invention discloses a lesser trochanter bone block belt loop titanium plate and an assembly thereof. The lesser trochanter bone block belt loop titanium plate comprises a titanium plate body and a thread loop. The titanium plate is a curved surface matched with the surface of a lesser trochanter bone block; two thread loop holes are formed in the titanium plate in a penetrating mode in the thickness direction of the titanium plate, and the thread loop is arranged in the thread loop holes in a penetrating mode; tooth nails are arranged at the two ends of the titanium plate, and the tooth nails are arranged on the concave face of the titanium plate; and a folding mechanism is arranged in the middle of the titanium plate. The assembly comprises a nailing device and an outer side end titanium plate, and the nailing device is provided with a sleeve and a conveying plate; the conveying plate is hinged to the end of the sleeve, and two side plates extend outwards with the hinge point as the center; and the outer side end titanium plate is connected with the titanium plate through the thread loop.

The invention provides an artificial femoral prosthesis capable of preventing postoperative loosening, which belongs to the technical field of orthopedic medical equipment and is used to solve the problem that artificial femoral prostheses loosen after femoral head replacement surgery. The prosthesis adopts a technical scheme that the front edge of an artificial prosthesis-fixing plate close to one end of a femoral lesser trochanter is provided with fixing screw holes; 1 to 3 fixing screw holes are symmetrically arranged on two sides of the central axis of the fixing plate; the positions of the fixing screw holes correspond to the cross section of a femoral wall; the back edge of the fixing plate close to a femoral greater trochanter is provided with fixing screw holes; and the positions of the fixing screw holes correspond to the femoral wall outside the greater trochanter. The prosthesis has the advantages that due to screw three-dimensional fixation on the greater and lesser trochanters, the better holding force of the prosthesis can effectively prevent the prosthesis from loosening and fracturing, ensures that the stress distribution of a prosthesis head towards a femoral shaft is more reasonable and closer to a physiological state, reduces too high local stress of the prosthesis and fractures caused by long-term too high local stress, prolongs the lifespan of the prosthesis, and delays revision time.

The invention relates to a femoral lesser trochanter fracture reduction and fixation guider. The guider comprises a two claw hook used for grasping lesser trochanter fracture blocks, a moving device,a screw and a hollow guider; the two claw hook comprises a first center part, a two claw part and a first connecting part; the moving device comprises a second center part, a second connecting part and a one claw part; the interior and the two ends of the hollow guider are hollow, a thread is arranged on the outer wall, a screw hole is formed in the one claw part, the hollow guider is screwed intothe screw hole of the one claw part, a Kirschner wire penetrates through one end of the hollow guider, then penetrates out of the other end of the hollow guider and then penetrates through a center notch of the two claw part. Accordingly, due to the fact that few parts are adopted, and no precision process exists, the cost is low; the linking relation between the structures is reasonable in design, and convenience is brought to use; the guider is applicable to reduction and fixation to the lesser trochanter fracture blocks in intertrochanteric fracture.

The present invention belongs to the technical field of medical prostheses and discloses a femoral upper segment hip joint prosthesis and a hip joint prosthesis using the femoral upper segment hip joint prosthesis. The femoral upper segment hip joint prosthesis comprises a prosthesis body, the prosthesis body comprises a bearing support prosthesis and an auxiliary support prosthesis, wherein the bearing support prosthesis is close to a lesser trochanter side of a human body femoral neck, the auxiliary support prosthesis is connected with the bearing support prosthesis and close to a greater trochanter side of the human body femoral neck, and the bearing support prosthesis comprises a solid prosthesis part and a plurality of first suture holes connected with the solid prosthesis part and located inside the auxiliary support prosthesis, wherein the plurality of the first suture holes are close to the greater trochanter side of the human body femoral neck, the bearing support prosthesis is of a solid structure, and the auxiliary support prosthesis is of a three-dimensional porous structure. The femoral upper segment hip joint prosthesis can improve stability after implantation.

The present invention provides a system and method for generating femoral X-ray films based on deep learning and digitally reconstructed radiological images, which performs deep multi-task regression through a three-dimensional convolutional neural network model, and automatically extracts CT slices including the lesser trochanter and the medial and lateral femoral condyles Layer, use the conditional generative neural network to segment the medial and lateral femoral condyles of the lesser trochanter, perform three-dimensional surface reconstruction on these two regions, solve the vertices of the lesser trochanter and the medial and lateral femoral condyles by calculating the Gaussian curvature, and calculate the plane of three points The angle between the horizontal plane and the final angle that needs to be rotated is obtained, and the X-ray film simulation image of the best position is obtained through digital reconstruction of the radiological image, replacing the film image used by the traditional CT simulation positioning machine. The present invention aims at the problem that the position of the femur in the current digitally reconstructed radiographic image can only be manually calibrated by doctors, the level of intelligence is not high, the calibration stability is poor, and the actual needs cannot be met, and the computer-aided method is used for femur CT film correction and X-ray film simulation. It can promote the intelligence of medical equipment.

The invention provides a device for femoral angle restoration and verification, comprising: a first guide plate used for biological reconstruction of the femoral neck on the affected side and a second guide plate used for inspection after biological reconstruction, the first guide plate is used to support The lower part of the femoral head has a first structure that fits with the lesser trochanter, the outer wall of the first guide plate is provided with a Kirschner wire channel for the Kirschner wire to pass through, and the Kirschner wire channel runs through the second A guide plate; the second guide plate has a second structure fitted to the lateral part of the femur and a handle part perpendicular to the lateral wall of the second structure. Its advantages are: it will basically not affect the growth and development of children in the later stage, and it can better restore the physiological function of the femoral neck; it can reduce the difficulty of surgery for doctors, thereby reducing the operation time and bleeding volume of patients, which is beneficial to postoperative recovery of patients.

A lesser trochanter fixation device, comprising a fixation forceps and a rivet fixation device; the fixation forceps comprises a first pliers handle, a second pliers handle hinged to the first pliers handle, a support rod connected to the first pliers handle, and a support rod connected to the The sleeve; the rivet fixing device includes a guide rod device, a rivet, and a push rod. The guide rod device includes a connected handle and a guide rod. The front end of the guide rod is provided with a blind hole extending axially to the rear end; The sleeve feeds the rivet into the through hole of the small rotor. The present invention can clamp the lesser trochanter of the femur by cutting a very small operation port on the patient, preventing secondary damage to the patient. Surgical port; After the lesser trochanter is screwed into the rivet, the silk thread is pulled out and tied to the femur, which can easily fix the lesser trochanter firmly on the femur.

The invention relates to an arc-shaped steel plate for fixation of intertrochanteric fracture and subtrochanteric fracture, belonging to the technical field of implants in human bodies. The arc-shaped steel plate for fixation of fracture is composed of a main plate and an arc-shaped plate, wherein the arc-shaped plate is manufactured at one side of the main plate, the main plate and the arc-shaped plate are integrated through arc transition, and the main plate and the arc-shaped plate are laminated and fixed with the femur through screws. According to the invention, by additionally arranging the arc-shaped plate at one side of the main plate, a screw implanting area at the front outer side or front side of the femur can be effectively utilized, six or more than six lock holes fixed to the femoral head through the femoral neck can be selected, neck built-in screws are dispersed, and the arc-shaped plate shares the stress of the main plate, so that the fracture reduction and fixation effect and plate support degree of the inner rear side of intertrochanteric fracture are improved; and the arc-shaped steel plate for fixation is wide in range of application, can be used for all stable and unstable intertrochanteric fracture and subtrochanteric fracture, splintered fracture of the medial femoral calcar and lesser trochanter as well as fracture of the femoral neck, is capable of effectively reducing the risks of coxa vara, coxa rotation, screw breaking and plate breaking, and is simple and convenient to install as well as safe and stable in use.

The invention discloses a device for fixing lesser trochanter of femur for the clinical bone fracture surgery department. The device comprises a main body box, an adjusting structure movably arrangedon the main body box, a leg fixing structure fixedly arranged on the rear side wall of the main body box and a limiting structure movably arranged on the adjusting structure. The invention relates tothe technical field of orthopedic medicine. The distance for fixing the lesser trochanter of femur can be adjusted according to the distance of the surgical leg through the adjusting structure, the thigh of the human body can be limited and prevented from moving through leg fixing, surgical operation is facilitated, the lesser trochanter of femur can be fixed at the corresponding position by equipment through the limiting structure, the leg fixing structure and the adjusting structure are matched, multi-directional fixing is achieved, and after fixing, the lesser trochanter of femur is conveniently fixed through steel nails.

The invention discloses a method and system for auxiliary calculation of leg length using deep learning, and the method comprises the following steps: using a first classification neural network to narrow an image range where anterior superior spine is located, using a second segmentation neural network sepnet to detect a pelvis within the image range, determining the position of the anterior superior spine according to a medical definition, adopting a third segmentation neural network deeplab for segmentation to identify a femur part without a femur head, determining a lesser trochanter according to a medical concept, and calculating the leg length based on the vertical distance between the cross section where the lesser trochanter is located and the cross section where the anterior superior spine is located. The first classification neural network is a vgg16-lspp obtained by improvement on the basis of a vgg16 network using a mish activation function and a spp structure using dilated cavity sampling. Point cloud data forming the left femoral stem and the right femoral stem are equally divided into two sets on the axis of the sagittal plane, and the innermost points are found to serve as the positions of the left lesser trochanter and the right lesser trochanter.

The invention provides a thighbone lesser trochanter fixator which comprises two linear type handles which are connected through a hinge, wherein the two linear handles are respectively provided with an arc-shaped cover, an opening of one arc-shaped cover faces the other arc-shaped cover, a through hole is formed in each arc-shaped cover, a sleeve is installed on the through hole of one arc-shaped cover, and one end of each linear handle, away from each arc-shaped cover, is provided with a limiting strip. The fixator can effectively fix the thighbone lesser trochanter, meanwhile can improve precision of punching of an electrical drill, and is beneficial for proceeding of an operation.

The invention discloses a clinical femoral lesser trochanter fixing device which comprises a lower fixing plate, an upper fixing plate and a clamping rod, lower fixing blocks are fixedly connected to the left side and the right side of the lower fixing plate correspondingly, a containing cavity is formed in the top of each lower fixing block, and fixing springs are fixedly connected to the left side and the right side of the bottom of an inner cavity of each containing cavity correspondingly. The rotating disc is rotated to drive the screw rod to rotate, the screw rod drives the screw sleeve to move downwards under the action of threads, the screw sleeve drives the connecting rod to move downwards through the sliding block, and the connecting rod drives the second clamping block to move downwards until the second clamping block is clamped in the inner cavity of the second clamping base; in the process that the second clamping block moves downwards, the second clamping block drives the movable plate to move downwards through the second clamping base, the movable plate drives thea fixed spring to deform and extrude downwards, and the movable plate drives the first clamping block to move downwards until the bottom of the first clamping block is clamped in the inner cavity of the first clamping groove so that the lower fixing plate and the upper fixing plate are fixed.

The invention relates to a preparation method of a 3D printing combined guide plate suitable for a femoral neck system.The preparation method is composed of a fracture three-dimensional CT data collection part and a guide plate design part, and the guide plate design part is composed of a central guide needle guide hole design, an anti-rotation guide needle guide hole design, a lesser trochanter positioning and fixing guide hole design and a detachable fixing base design; according to the invention, the accuracy of screw placement can be effectively improved, the safety of screw placement is improved, the operation time is shortened, and the exposure times and time of patients and medical personnel under X-rays are reduced.