99 results about "Femoral Neck Fractures" patented technology

The instantly disclosed implant is designed to resurface or partially replace (two versions) the arthritic or osteonecrotic femoral head in an anatomic fashion with maximum fixation, durability and stability. It will serve a wide range of patient ages, arthritic / traumatic deformity, and bone pathologies while providing for high performance activity. The implant has absolute fixation utilizing existing, contoured femoral head bone with or without bone cement / porous texturing, an internal plate with modular head attachment, and advantageously benefit from the concurrent use of precision guided instrumentation. This implant optimizes maximal femoral head contact with or without porous contact surfaces but does not rely purely on the head for long term stability. This new concept prevents the common failure mechanisms of femoral neck fracture, loosening and malpositioning as well as makes patient bone quality less important for this high performance hip resurfacing implant.

Disclosed therein is a big femoral head and femoral head surface replacement, which are used for hip osteoarthritis and vascular necrosis of femoral head. As a person get older and aged, the weight bearing hip joint is indispensably changed to osteoarthritis and sometimes showed avascular necrosis of the femoral head with unknown etiology. The deformed femoral head and hip joint should be replaced with the THA. Till now, the total hip replacement is performed in such a way that the necrosed femoral head and a healthy femoral neck are all removed and a femoral stem is inserted into the marrow cavity, and in this case, a small femoral head causes a reduction of a range of motion and dislocation of the hip joint occasionally, and osteolysis due to abrasion of plastic acetabular liner. In case of a conventional femoral head surface replacement (hereinafter, called “conventional FHSR”), a complication of femoral neck fracture and could not combined use with conventional THA. Recently, hard bearing system such as metal on metal THA or ceramic on ceramic THA without using plastic has been introduced to solve the problem of osteolysis due to abraded plastic particles generated when the THA is worn out as time goes. But there also have many problems as a limited range of motion, resected normal femoral neck and difficulties of rereplacement of the femoral stem. Because of the big femoral head or the FHSR can increase the range of motion and lower dislocation rate these devices are gradually widespread in young active person and Asian peoples. This invented design of the modularity gives the convenience to the surgeon and economically lower burden to patients to use of the FHSR and big femoral head system. The related accessory showed initial stability of the FHSR during operation and prevent from femoral neck fracture in follow-up periods.

To provide an impact-absorbing pad fully satisfying impact absorbability for preventing femoral neck fractures, wearing comfort and breathability not to cause discomfort for all-day use, a small thickness not to impair external appearance, and flexibility in a surface direction not to cause uncomfortable feeling at the time of putting on and taking off, which are required for the impact-absorbing pad used in a hip protector, clothing furnished with the impact-absorbing pad, and a method for preventing femoral fractures. A pad main body having impact absorbability includes an impact-deflecting part having a through hole or concavity with a maximum length of 80 mm or less and an area of 600 mm2 or more and 5,000 mm2 or less, and the pad main body is disposed so as to apply the impact-deflecting part onto the greater trochanter of the femur, thereby preventing femoral fractures.

A bone fixation system comprises an elongated implant shaft extending from a proximal end to a distal end along a central longitudinal axis and including a first channel extending from the proximal end to a side opening formed in a side wall of the implant shaft along a first channel axis. The bone fixation system further comprises a bone plate having a first plate portion and a second plate portion, the first plate portion having a first opening extending therethrough along a first opening axis and the second plate portion having a second opening extending therethrough along a second opening axis, the second opening being configured to receive the implant shaft therethrough to permit insertion thereof into a head of a bone.

A bone fixation system includes a bone fixation device, including a first element having a first channel extending therethrough and a second element including a proximal portion sized and shaped to be received within the first channel such that the longitudinal axes of the first and second elements are substantially coaxial and a distal portion including a bone engaging structure, a proximal end of the second element slidably locked within the first channel such that the first and second elements are longitudinally movable relative to one another between a permitted range of motion. The system also includes a driving tool, including an outer sleeve and an inner sleeve slidably received therethrough, a distal end of the outer sleeve configured to engage the proximal end of the first element to prevent relative rotation therebetween, a distal end of the inner sleeve configured to engage the proximal end of the second element.

The invention discloses an auxiliary device of a combined lower limb orthopedic operation traction bed. The auxiliary device comprises a ground supporting structure. A supporting component is mounted on the ground supporting structure and comprises a thigh support, a shank support, a universal joint member used for connecting the thigh support with the shank support, a thigh bracket set up on the thigh support, a shank bracket set up on the shank support, a thigh supporting unit for supporting the thigh support, and an ascending-descending supporting unit used for driving the shank support to ascend and descend and supporting the shank support to swing around the universal joint member, wherein an operating space which is not connected is formed between the shank bracket and the thigh bracket. The auxiliary device has the advantages that for a patient with femoral neck fracture, the fractured side can be fully and stably abutted when being placed, so that physical strength consumption and nervousness of the patient are reduced; physical strength of an operator can be saved with the help of an operation support, the femoral neck fracture can be positioned conveniently, and accuracy of embedding insertion removing is improved greatly.

The invention provides a dynamic locking plate for treating a fracture of a neck of a femur. The dynamic locking plate comprises a tuberosity supporting plate and three locking screw holes, wherein the inner surface of the tuberosity supporting plate is bent to be matched with the lower part of a greater trochanter of the femur in shape; the positions of the three locking screw holes including a first locking screw hole, a second locking screw hole and a third locking screw hole in the tuberosity supporting plate are based on a locating point A at the middle of the tuberosity supporting plate, and distributed around the locating point A; the first locking screw hole, the second locking screw hole and the third locking screw hole are distributed to form a triangle in the tuberosity supporting plate; axes of the three locking screw holes are parallel; based on a vertical line AO of the tuberosity supporting plate where the locating point A is positioned, the axial lines of the three locking screw holes are inclined upwards and form longitudinal included angles theta with the vertical line AO, which are equal to 15-35 degrees. The locating point A is located within the range that the geometric center of the tuberosity supporting plate is taken as a center, and the diameter is 4 mm. The dynamic locking plate enables the broken end of a fractured bone to be subjected to micro-movement and compression, and adapts to dynamic characteristics of bone growth when improving the internal fixation stability of the neck of the femur, so as to be more beneficial to healing of the broken end of the fractured bone.

The invention discloses a locating assisting device for femoral neck fractures. The locating assisting device comprises a base, a frame, a square aiming block, a fixing column A and a fixing column B, wherein the frame is perpendicularly arranged on the base and can rotate around a longitudinal axis of the frame in the plane of the base; the fixing column A is fixed at the top end of the frame; the square aiming block is erected on the frame through a rotating shaft, can move freely in sliding grooves formed in two sides of the frame, can be fixed to any position and can also rotate around the rotating shaft; a plurality of locating holes are formed in the surface of the square aiming block, and the fixing column B is detachably fixed in the center of the surface with the locating holes. The locating assisting device can shorten operation time, reduce operation wounds, reduce bleeding amount, reduce damage to femoral neck bones, reduce radioscopy times and reduce radiation to patients and medical workers.

The invention discloses an in-vitro dynamic hip screw guider comprising guide needle cannulas and a guide block. The guide block is provided with a bottom edge and guide edges. The bottom edge is provided with two parallel puncture needles. The bottom edge is provided with a plurality of guide needle holes parallel to the guide edges. The guide needle cannulas are inserted into the guide needle holes. With the in-vitro dynamic hip screw guider, the positioning operation in needle passing and fixation for femoral intertrochanteric fracture and femoral neck fracture is simplified, a needle feeding point can be positioned quickly and accurately, and the needle feeding angle can be kept quickly and accurately; the guider has the advantages of avoidance of heavy wound, high cost, radiation and the like; through using the guider, the number of photographing or raying times is reduced, surgical time is shortened, surgical bleeding is less, and patients feel less pain; in addition, the guider guarantees safety and reliability of operation and is simple in structure, easy to disassemble, convenient to carry, economical, practical and suitable for final popularization and application.

The invention relates to a clinical intelligent assistant decision-making method and system for femoral neck fracture. The method comprises the following steps: establishing an index data set dictionary; according to the index data set dictionary, performing Chinese word segmentation and logic processing by applying real EMR electronic case document data, so that the EMR electronic case document data is structurally converted into standardized data recognized by a computer; establishing a rule decision model; establishing an algorithm decision model; training an algorithm decision model; acquiring preoperative information of a patient to be evaluated, transmitting the preoperative information to the rule decision model and the algorithm decision model, evaluating preoperative indexes of the patient through the rule decision model and the algorithm decision model, and deciding whether to perform operative treatment or not. The preoperative information of the to-be-evaluated patient is evaluated through the rule decision model and the algorithm decision model, whether operative treatment is conducted or not is decided, the method is used for auxiliary decision making of femoral neck fracture clinical treatment, reference bases are provided for doctors, and accuracy and working efficiency are improved.

The invention discloses a femoral intertrochanteric fracture double-sleeve type osteosynthesis device. The femoral intertrochanteric fracture double-sleeve type osteosynthesis device comprises an osteosynthesis plate, double-sleeve nails and a plurality of locking screws. The osteosynthesis plate is matched with the outer side of the femoral neck end in shape and the width and the thickness of the osteosynthesis plate decrease from top to bottom. The upper portion and the lower portion of the osteosynthesis plate are provided with a plurality of threaded locking holes and the middle portion of the osteosynthesis plate is fixedly connected to two sleeves. The double-sleeve nails comprise two half-threaded empty nails and the tail ends of the two half-threaded empty nails are sleeved in the two sleeves of the osteosynthesis plate. The locking screws are used for fixing the osteosynthesis to a femur through the locking holes. When the femoral intertrochanteric fracture double-sleeve type osteosynthesis device is used clinically, the two half-threaded empty nails are screwed along a guide needle, the sleeves sleeve the tail ends of the half-threaded empty nails, the upper portion of the osteosynthesis plate is fixed to a femoral greater trochanter with 3 or 4 locking screws, and the lower portion of the osteosynthesis plate is fixed to a femoral shaft. The femoral intertrochanteric fracture double-sleeve type osteosynthesis device can reduce the fracture line, improves stability and is quick in healing and suitable for diversity femoral neck fracture repair.

The invention discloses a controllable and slidable locking compression plate for a femoral neck. The controllable and slidable locking compression plate for the femoral neck comprises a fixation steel plate, wherein the shape of a mounting surface of the fixation steel plate is matched with an anatomical structure at a near end of a thigh bone; a femoral shaft fixation hole, multiple screw thread locking holes and multiple sleeves are arranged on the fixation steel plate, a fixation screw is arranged in the femoral shaft fixation hole, the multiple sleeves correspond to multiple screw thread locking holes one by one, each sleeve is matched and connected with the corresponding screw thread locking hole and is coaxial with the screw thread locking hole, a slidable screw and a limit body used for limiting excessive looseness of the slidable screw are arranged in each sleeve, a sliding space exists between the limit body and the corresponding slidable screw, and the size of each sliding space can be controlled by regulating the length of the corresponding limit body. The controllable and slidable locking compression plate for the femoral neck has the advantages that continuous and sliding pressurization can be provided for a fracture end in a fracture healing early stage of the femoral neck, and excessive sliding produced by the screws in the sleeves also can be avoided, so that shortening of the femoral neck is reduced to the utmost extent while the fracture healing of the femoral neck is guaranteed.

The invention discloses a femoral neck fracture hollow nail screw rotary disc positioning device, which comprises a rotation adjusting mechanism, a transverse displacement adjusting mechanism, a longitudinal displacement adjusting mechanism and a universal joint positioning mechanism. The rotary disc positioning device comprises a rotary adjusting mechanism, a transverse displacement adjusting mechanism, a longitudinal displacement adjusting mechanism and a universal joint positioning mechanism. The invention adopts the femoral neck guide pin as the fixed axis, and determines the installationposition of the hollow nail through the rotation of the rotary positioner. The hollow nail can be rotationally adjusted and positioned in parallel with the guide pin of the femoral neck at all times.Thus, the purpose of fast and accurate parallel positioning of the hollow pin can be achieved. Compared with the prior art, the invention realizes the simplification of the structure and the simplicity of the operation under the condition of complete functions, has wide use range, and is more conducive to the popularization and application.

The invention discloses a proximal femur internal fixation system with minimal invasion, relating to an internal fixation system used for proximal femur comminuted fracture, femoral neck fracture, subtrochanteric fracture and femur backbone fracture. The internal fixation system comprises an internal fixation steel plate, an internal fixation bolt and a locking device, wherein the internal fixation steel plate adopts a dynamic hip screw steel plate or a proximal femur internal steel plate, the dynamic hip screw steel plate is composed of a head part and the rod part, and the proximal femur internal steel plate is composed of a head part and a rod part; the locking device comprises a rotary pin, a sliding pin, a spring and a locking disc; the internal fixation bolt comprises a combined tension force bolt or a combined hollow bolt, a hollow bolt, a spongy bone bolt, a cortical bone bolt and a locking bolt, wherein the combined tension force bolt is composed of a connecting sleeve, a connecting bush and a tension force bolt; the combined hollow bolt is composed of a hollow bolt and a bolt sleeve. The internal fixation steel plate and the internal fixation bolt are connected and fixed by the locking device, which can simplify operation steps, shorten operation time and leave small cut.

The invention discloses an anti-infection external fixation hollow spicule with a tail cap and an injection hole, which relates to a hollow spicule capable of being injected with liquid, is a metal spicule required during treatment of femoral neck fracture by an external fixation support, and also can be used for fixing long bone of limbs. The anti-infection external fixation hollow spicule comprises a hollow spicule body, an inner core and the tail cap, wherein an inner core hole is formed in the hollow spicule body; a fast mounting connector and an injector connector are arranged at the tail of the hollow spicule body; a cancellous bone thread is formed in the head of the hollow spicule body; a Kirschner wire is arranged at the front part of the inner core; a short cylindrical body is arranged at the back part of the inner core; the Kirschner wire arranged at the front part of the inner core is matched with the inner core hole in the hollow spicule body closely and smoothly; the tail cap is provided with an inner core mounting hole; and a tail cap inner thread is formed in the lower end part of the inner core mounting hole. The tail cap can be quickly connected to the tail of the hollow spicule body; the tail cap inner thread is matched with the injector connector at the tail of the hollow spicule body; a seal ring is mounted in the tail cap; and the tail cap can fix the movement of the inner core and prevent liquid from flowing out and being in contact with air.

The invention relates to a minimal invasive combined pressurizing and locking bone fracture plate for trochanter comminuted fracture and femoral neck fracture. The bone fracture plate comprises a trochanter rear-side fixing plate and a femoral proximal-end fixing plate, which are connected into an integrated structure for respectively covering the trochanter rear side and femoral proximal end in an annular shape, wherein first locking holes are respectively formed on two ends of the trochanter rear-side fixing plate, and first locking nails which penetrate the rear side of the trochanter crown head end and the rear side of the trochanter crown bottom end are locked in the two first locking holes respectively; three second locking holes, arranged in a regular triangle way, are formed on the femoral proximal-end fixing plate, a second locking nail for locking femoral trochanter, femoral neck and bulb penetrates at least one second locking hole; and the trochanter rear-side fixing plate and the femoral proximal-end fixing plate are connected into an integrated structure for covering the trochanter rear side and femoral proximal end in an annular way. By utilizing a ball lag screw or a locking lag screw, tensioning of the trochanter, the femoral neck and the bulb and positioning lock on the femoral diaphysis are realized, so the minimal invasive combined pressurizing and locking bone fracture plate for the pulverous trochanter fracture and femoral neck fracture has the advantages of simpleness in operation, small cut, good fixing effect, firm tensioning, no potential safety hazards in long term use, no deformation and good treatment effect and is beneficial to accurate diaplasis.

The invention relates to a novel application of Lnc RNA H19 (long non-coding ribonucleic acid H19), that is, overexpression of Lnc RNA H19 can delay the progression of disease from DDH (developmental dysplasia of hip) to osteoarthritis. The application has the advantages that the research of 7 cases of DDH cartilage tissue and 6 cases of cartilage tissue of fractured femoral neck shows that the expression of Lnc RNA H19 in DDH is remarkably reduced compared with that of Lnc RNA H19 in femoral neck fracture, and H19 is possible to have a relation with occurrence and development of DDH; DDH is accelerated to deteriorate into osteoarthritis if H19 is knocked down; the expression of H19 can be promoted through transfection of a slow virus LV-H19, and the overexpression of H19 can delay the progression of disease from DDH to osteoarthritis.

The invention discloses a femoral neck fracture closed reduction evaluation method and a system based on a three-dimensional C-type arm machine. The method comprises the following steps of S1, after closed reduction is performed in an operation, using the three-dimensional C-type arm machine to carry out multi-dimensional imaging on a femur of a femoral neck fracture side after the closed reduction and a femur of a health side; S2, calculating an A line length alpha and an included angle beta of a projection of a B line on an alpha tangent plane and the B line on a model of multi-dimensional imaging; and S3, according to an alpha value alpha-0 / a beta value beta-0 of a normal side, and an alpha value alpha-1 and a beta value beta-1 of a fracture side which are acquired in the step S2, evaluating an operation closed reduction effect. In the invention, a data-based mode is used to determine, and a problem that a result of a personal subjective determination is not accurate in the prior art is solved.

The invention discloses a trapezoid locking steel plate with radian for treating femoral neck fracture, which comprises a trapezoid locking steel plate with a narrow upper end and a wide lower end; the trapezoid surface on the trapezoid locking steel plate, fit with the close end of femur, has radian; a central hole is arranged in the central position of the trapezoid locking steel plate; six locking holes are arranged in the trapezoid locking steel plate, and are parallel to the direction of the central hole; the six locking holes are arranged in a diffused manner towards the upper end, the left lower end and the right lower end by taking the central hole as the center; two locking holes are arranged in each direction; and locking bolts are arranged on the locking holes. In the invention, the locking holes which can fix the bolts in parallel are arranged on the trapezoid locking steel plate, so that the bolts can be completely fixed in parallel in the internal fixation treating link in the femoral neck fracture operation, the trapezoid locking steel plate can be placed uprightly or reversely and has radian so as to match the shape of near end of the femur, so that the bolts are hard to withdraw, the operation is simple, the time consumption is less, the fixation is reliable, and postoperation recovery is fast.

The invention relates to a femoral neck fracture fixing structure. The femoral neck fracture fixing structure comprises a femoral neck with a fracture line and a femoral neck fixing mechanism connected with the fracture line, wherein the femoral neck fixing mechanism comprises a femoral neck screw and a rotation resistant screw; the femoral neck screw comprises a screw body, two receding resistant screw threads and a penetrating hole, wherein the receding resistant screw threads form a right triangle in the axial section of the screw body, and the hypotenuse of the right triangle faces towards the screwing-in direction of the femoral neck screw; the rotation resistant screw is arranged in the penetrating hole of the femoral neck screw in a penetrating manner and is used for preventing the femoral neck screw from automatically rotating. According to the femoral neck fixing mechanism provided by the invention, the disadvantages that in DHS, a side screw is deviated, the operation time is long, and the bleeding amount is large are overcome; defects that in PFN, anchor resultant force is insufficient and the locking is cut out are improved by utilizing the reasonable combination of the femoral neck screws.

The invention discloses a femoral neck fracture fixing and positioning device, and relates to an outer support for treating femoral neck fractures. The femoral neck fracture fixing and positioning device comprises a positioning rod, two steel needles and a regulator. The regulator is composed of a fixed block and a sliding and rotating block, wherein the sliding and rotating block can slide relative to the fixed block and / or rotate around the fixed block to be fixed. Two needle penetrating holes for the steel needles to penetrate in are formed in the sliding and rotating block. According to one structure of the sliding and rotating block, one end of a rotating block is movably connected with the fixed block and can rotate relative to the fixed block, a sliding block capable of sliding relative to the fixed block in the plane is arranged in the rotating block, and the two needle penetrating holes for the steel needles to penetrate in are formed in the sliding block; according to another structure of the sliding and rotating block, the sliding block is movably connected with the fixed block and can move relative to the fixed block in the plane, the rotating block is arranged in the sliding block, and the two needle penetrating holes for the steel needles to penetrate in are formed in the rotating block. The femoral neck fracture fixing and positioning device has the advantages of being easy and convenient to operate and capable of less adopting X-ray fluoroscopy and being accurately fixed at the optimal position.

A bone fracture internal fixator for repairing a bone fracture of a femoral neck that allows load to be applied to the associated bone parts evenly, and increases the connecting strength between the femoral head and femoral shaft while minimizing the risk of the femoral head being torn apart by the inner connecting member by increasing the diameter of the inner fixing member. The central axial line of the femoral head is offset from the central axial line of the intramedullary nail placed in the medullary cavity of the femoral shaft. In order to bring the inner fixing member such as a lag screw configured to be inserted through the femoral neck close to the central axial line of the femoral neck, the central axial line of the through hole for receiving the inner fixing member is offset from the central axial line of the intramedullary nail.

The invention discloses an in vitro aiming device suitable for minimally invasive screw internal fixation of femoral neck fracture. The aiming device comprises a bone traction frame central column, a locating plate and a spatial location and angle adjustment mechanism connected between the locating plate and the bone traction frame central column, wherein the locating plate is provided with a first locating needle and a second locating needle; the first and second locating needles share the plane; a third locating needle sharing the plane with the second locating needle is arranged at the tail end of the second locating needle on a rotating disk; scribed lines and characters corresponding to the rotating angle of the rotating disk are marked on the ring-shaped side wall of an upper rotating disk; and an internal fixation nail passing opening communicated with front and rear orifices of a cannula is arranged on one side wall of the cannula. The aiming device overcomes the technical defect of the existing aiming devices that plenty of radiation is caused to the medical staff and can rapidly and accurately determine the body surface implanting position of the hollow guide needle.

The invention discloses a disposable femoral neck fracture operation repositor which comprises a lower limb frame, a drill jig, a transverse position adjusting clamp, a lower thigh fixing clamp and an inner fixing device. At present, patients with femoral neck fractures are treated by objectively and visually inserting screws under fluoroscopic control, the problems of inaccurate positioning, unequal needle pitch and not straight screw holes frequently occur, the potential harm of causing sciatic nerve lesions is possible to occur repeatedly, and the effect of operation is affected. Aiming at the defects of the prior art, the transverse position adjusting clamp and the lower thigh fixing clamp are used for fixing operation positions of patients and improving the drill jig. By adopting the drill jig method, arranging a special gang drill to insert screw and arranging the inner fixing device, the operating angle and accurate positioning required in clinic are satisfied, inner fixing is implemented, and the defects of the traditional uncontrolled operating method for holding the thigh to position by hand and inserting screws in single drill holes are overcome. The disposable femoral neck fracture operation repositor has the characteristics of operation convenience and safety and accurate repositioning, and the strength quality of inner fixing and the operation effect are improved. The disposable femoral neck fracture operation repositor is applicable to the clinic application to disposable repositioning of patients with femoral neck fractures.

The invention discloses a treatment system for in-vivo perfusion screening enrichment of stem cells. The treatment system comprises two hollow screws, two tees, a reservoir with a liquid inlet and a liquid outlet and two two-way valve devices capable of changing flow directions, a cavity opening at the tail of one hollow screw is connected with the liquid inlet of the reservoir respectively through the tees and the two-way valve devices capable of changing the flow directions, and a cavity opening at the tail of the other hollow screw is connected with the liquid outlet of the reservoir respectively through the tees and the two-way valve devices capable of changing the flow directions. By the aid of the treatment system, in-vivo perfusion of bone marrow stem cells can be realized, circulation is formed, so that the bone marrow stem cells can be rapidly screened and enriched to a focal zone, bone regeneration and bone healing are promoted, and the treatment system can also be used for femoral neck fracture and prevention of complications such as nonunion of the femoral neck fracture bones or femoral head necrosis.

The invention discloses a femoral neck fracture hollow screw imbedding guide device. The femoral neck fracture hollow screw imbedding guide device comprises a first guide base body and a second guidebase body, the second guide base body is detachably connected to the first guide base body, the first guide base body is provided with at least one first hole, the second guide base body is provided with at least two parallel second holes, the first hole is used for inserting a guide needle within a preset angle range, and the second holes are used for inserting the guide needle with a preset angle. By means of the femoral neck fracture hollow screw imbedding guide device, on the basis of achieving a good treatment effect, the treatment cost of a patient can also be greatly lowered.

The invention discloses a three-dimensional reverse customization femoral neck fracture surgical navigator and a using method thereof. The navigator comprises a base which can be fixed to a thigh bone, a guiding base connected with the base through a connecting rod, a guiding pipe moving along the guiding base, a guiding pin and a screw, wherein the bottom of the base fits the thigh bone of the human body in shape. The base, the connecting rod and the guiding base adopt three-dimensional engineering software modeling according to characteristics of a patient and are printed and manufactured through a 3D printer according to the specific characteristics of the thigh bone of the patient, only a small incision needs to be cut in the patient during surgery, the base is placed into incision and positioned, fastening work of the screw can be performed conveniently, the operation process is simple, precision is high, the surgical difficulty can be lowered, and the surgical precision can be improved.