51 results about "Femur neck fracture" patented technology

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 discloses a bone connecting device for treating femoral neck fracture. The bone connecting device comprises a bone connecting plate, wherein the bone connecting plate comprises a bone connecting plate upper part and a bone connecting plate lower part which are connected in sequence; the bone connecting plate upper part is outwards and obliquely arranged at the upper end of the bone connecting plate lower part, and the middle of the bone connecting plate is thicker than the two ends of the bone connecting plate; the bone connecting plate upper part is provided with three sleeves arranged in an invertedly triangular manner, and hollow screws are arranged in the sleeves; threads are formed in the front ends of the hollow screws, and no threads are formed in the rear parts of the hollow screws; during use, the hollow screws are obliquely arranged in the femoral head through the femoral neck from the greater trochanter; the threads are fixed in the femoral head, the rear parts of the hollow screws are connected with the femoral neck and the sleeves in a sliding manner, and locking screw holes locked with fixing screws in a thread manner are formed in the bone connecting plate lower part. Therefore, the fracture part can be pressurized in a femoral neck healing process, the fracture line is reduced, the blood supply rebuilding of the femoral neck fracture end becomes possible, the angular stability is relatively good, the fracture displacement can be prevented, and the occurrence rate of femoral head necrosis is reduced.

The invention provides a multi-model fusion femoral neck fracture region positioning and segmenting method and system. The multi-model fusion femoral neck fracture region positioning and segmentationmethod comprises the steps: preprocessing an acquired femoral neck X-ray film; inputting the preprocessed X-ray film image into a constructed and trained detection neural network for detection, and obtaining a femoral neck region image Pictureorigin; inputting the femoral neck region image Pictureorigin into the constructed and trained segmentation network to obtain a segmentation effect image Picturebinary; and fusing the obtained segmentation effect picture Picturebinary and the femoral neck region image Pictureorigin to form a thermodynamic diagram representing a fracture region and a fracture degree.

The invention belongs to the technical field of surgery equipment for orthopaedics, and relates to a first quasi type hollow nail minimally invasive mechanical transplanting system based on a femoralneck surgical central axis. The first quasi type hollow nail minimally invasive mechanical transplanting system comprises a nail feeding point positioning guider, a femoral neck front cortex key pointtranscultural positioning device, a first quasi type femoral neck surgical central axis minimally invasive mechanical navigation system, and a femoral neck hollow nail guide pin positioning and orientating combined slide module. According to the first quasi type hollow nail minimally invasive mechanical transplanting system disclosed by the invention, the nail feeding point positioning guider, anisthmus center point transcultural positioning device and the first quasi type central axis mechanical navigation system are adopted, and the hollow nail guide pin positioning and orientating slide module is combined for use, so that procedures of femoral neck surgical central axis determination, first quasi type guide pin transplantation, hollow nail positioning, orientating and transplanting, and the like can be completed, the situation that the guide pin and the hollow nail can be successfully transplanted in one time can be effectively realized, the distance precision of the guide pin canbe effectively controlled, iatrogenic accidents easily caused by manual operations are avoided, the incidence rate of the iatrogenic accidents is reduced, the success rate of a surgery is effectivelyincreased, and a base is established for hip preserving treatment of femoral neck fracture.

The invention relates to a femur neck side hole drainage pressure reducing hollow tension screw system, in particular to a system used for femur neck fracture and femoral head osteonecrosis, and belongs to the field of medical appliances. The femur neck side hole drainage pressure reducing hollow tension screw system is applicable to bone surgeries, and comprises a femur neck side hole drainage pressure reducing hollow tension screw (1), a single-head external connection negative pressure drainage device (2) and a multi-head external connection negative pressure drainage device (3), wherein drainage pressure reducing side holes (11) are uniformly distributed in the screw body part of the femur neck side hole drainage pressure reducing hollow tension screw (1) and are communicated with a screw body hollow tubular structure (10); a threaded hole (9) formed inside the right side of the screw tail of the femur neck side hole drainage pressure reducing hollow tension screw can be matched with external joint screw threads (12) of the single-head external connection negative pressure drainage device (2); and the external connection negative pressure drainage device is realized.

The invention discloses a biotype artificial hip joint surface replacement prosthesis comprising a hemispheric prosthesis cap, which is cooperated with the shape of the caput femoris and is disposed on the caput femoris; a carrying steel plate, which is fixedly disposed on one side of the tuberosity of the caput femoris; a carrying column; an inserting column; a main bolt used for fixing the carrying column; and at least one auxiliary bolt. The invention can be used to prevent the loosening of the prosthesis and the fracture of the femoral neck around the prosthesis effectively.

The invention discloses a femoral neck fracture angle stable type intramedullary fixing device. The device is structurally characterized in that one end of a sighting device A is connected with a sighting device B through a fixing knob I, and the other end of the sighting device A is connected with a main nail through threads; dovetail grooves are formed in the two side surfaces of the sighting device B, the sighting device B is connected with sighting device accessories through the dovetail grooves, tension lock pins and a far-end lock pin sleeve guide hole are arranged / formed at / in the top surface of the sighting device B, and a sleeve is inserted into the hole so that the tension lock pins and a far-end lock pin can be driven therein; each sighting device accessory consists of two symmetrical pieces, a pull nail sleeve guide hole penetrating up and down is formed in the top surface of each sighting device accessory so that pull nails except the main nail can be driven therein, and the optimal positions of the pull nails except the main nail can be selected through up-down sliding of the dovetail grooves; after femoral neck fracture is reduced and the main nail is inserted, the pull nails except the main nail are firstly driven in for pressurization, then two pull locking nails and a far-end locking nail are driven therein, and the three hollow nails for the femoral neck are dispersedly fixed, so that the anti-rotation capability is improved, and the stability of fracture reduction and healing is enhanced.

A fixation device for providing rotation stability to a femoral neck fracture. The device includes a bone plate having at least one opening, a compression screw housing extendable through the opening of the bone plate, a compression screw being at least partially disposed within the bore of the housing and selectively moveable through the bore, and a collapsible and expandable anchoring member coupled to the compression screw. The anchoring member is configured to transition between a collapsed condition and an expanded condition upon advancement of the anchoring member from the compression screw housing to rotationally stabilize the compression screw within a femur.

The invention discloses an internal fixation anti-slip locking bone fracture plate applied to a femoral neck fracture. The bone fracture plate comprises a fixing part and a supporting part which are of an integrated structure, wherein the fixing part is used for being fixed to the front side of the proximal femur, the supporting part extends upwards and inwards from the fixing part and extends inthe direction of the femoral head below the femoral neck, and the supporting part is used for bearing a proximal bone structure of a femoral neck fracture line. The bone fracture plate is placed in front of the proximal femur, so that a proximal femur neck fracture line bone structure is supported below the femur neck, downward movement of the proximal bone structure of the femoral neck fracture line above the bone fracture plate caused by the gravity of a patient is effectively avoided, and the effects of supporting and avoiding sliding displacement of the femur neck fracture are achieved; and therefore, the probability of internal fixation failure of the femoral neck fracture is reduced, and the curative effect of femoral neck fracture surgery is improved.

The invention discloses a femoral neck fracture fixing device. The femoral neck fracture fixing device comprises side steel plates, three sleeves, three head nails matched with the sleeves and at least one cortical bone locking screw. The inner surfaces of the side steel plates are matched with the anatomic form of the near-end outer side wall of the thigh bone. The head side of each side steel plate is provided with three conical threaded locking holes, and the tail side of locking the steel plates is provided with at least one cortical bone locking screw. The sleeves of hollow structures. The tail portions of the sleeves are matched with the conical threaded locking holes. The cortical bone locking screws are matched with cortical bone locking screw locking holes. The femoral neck fracture fixing device produces small wounds and is good in fixing effect, simple in operation and accurate in positioning.

The invention relates to a fixing device for femoral neck fracture. The device includes a lateral locking plate and a plurality of femoral neck main nails; the main body shape of the lateral locking plate has an anatomical radian conforming to the outer side of the proximal end of a femur, the femoral neck main nails include first, second, third and fourth femoral neck main nails, and the laterallocking plate is provided with a plurality of main nail holes matched with the femoral neck main nails; and the first femoral neck main nail is locked in the central part of a femur neck, the second femoral neck main nail is vertically locked and fixed to the fracture end of the femoral neck, the third femoral neck main nail and the fourth femoral neck main nail are locked tightly to the bone cortices of the left and right femoral necks respectively, and the third and fourth femoral neck main nails spread towards the respective lateral directions. The fixing device taking into account clinicalefficacy and minimally invasive for the femoral neck fracture is provided.

The invention relates to the field of medical image processing, and discloses a femur neck fracture detection method and system based on weak supervision segmentation; the method comprises the steps:obtaining a detection image, inputting an obtained femur neck X-ray film into a constructed and trained detection neural network, and carrying out the detection of a femur part; obtaining a probability segmentation map P<probability and a femur neck region detection image P<detec>; acquiring the fracture type of the femur neck region, inputting the femur region detection image P<detec> into a constructed and trained classification network, and acquiring the type of the femur part fracture; acquiring a segmented fracture part, and inputting the femur region detection image P<detec> into a constructed and trained weak supervision segmentation network to obtain a segmented fracture part image P<seg>; and performing image fusion to obtain a femur neck region fracture image, and performing fusing on the segmented fracture part image P<seg> and the femur region detection image P<detec>to generate and output a femoral neck fracture region image. The femoral neck fracture is segmented througha weak supervision segmentation method, the detection precision is high, and the efficiency is high.

The invention provides a novel supporting and pressurizing screw for femoral neck fracture. The novel supporting and pressurizing screw comprises a screw body; the screw body is of a hollow structure;an outer surface of the head end of the screw body is provided with a first thread; an outer surface of the tail end of the screw body is provided with a second thread; the direction of the first thread is opposite to the direction of the second thread; and the tail end of the screw body is provided with a cutting surface which is used for adhering a diaphysis. According to the invention, the screw threads with opposite directions are respectively arranged at the head end and the tail end of the screw body, so that the holding force is increased; after the tail end of the screw is cut, when the screw body is screwed into the femoral neck, the tail end of the screw is still provided with one screw thread to be in riveting with a cortex, so that holding force is enhanced; and meanwhile, thecutting surface is also clung to a bone surface, so that discomfort caused by protrusion of an internal fixture is reduced. The novel supporting and pressurizing screw is in close contact with the cortex of the diaphysis, and irritation is reduced.

The invention discloses a femoral neck fracture fixation device. The device includes a core rod, a plurality of blades and a locking component. The distal end of each blade contains an outwardly protruding front flange part which is matched and supported by the the inner wall of the bone cavity in a corresponding position. Positioning grooves are axially formed in the outer side of the core rod, the core rod is inserted into the center of the bone cavity and enables the back of each blade to be embedded in the corresponding axial positioning grooves in a matched manner, the core rod is used tosupport the corresponding positions on the inner wall of the bone cavity, and the rear end of the core rod is fixed at the base of the femoral neck. The blades fit the inner wall of the femoral neckinto the bone cavity first, and the destructiveness of the loose bone in the multiple bone cavity is minimized. Appropriate blades are selected and can be fitted to the enlarged part of the inner endof the femoral neck completely, so that the edge contour of each blade completely fits the inner wall of the enlarged part of the bone cavity. After the back of each blade is supported by the core rod, the blades are supported on the inner wall of the bone cavity of the femoral neck in the radial direction.

The invention relates to the technical field of medical surgical auxiliary equipment, and discloses a measuring instrument for artificial hip joint pressure. The measuring instrument includes an acetabular lining trial mold, the acetabular lining trial mold is composed of an acetabular lining shell, pressure sensors and a bluetooth signal transmitter, and the acetabular lining trial mold can be indata connection with computer equipment. The measuring instrument for the artificial hip joint pressure can improve the installation accuracy of artificial total hip replacement surgery and obtain amore ideal stress distribution, thereby improving the therapeutic effect of the artificial total hip replacement surgery; and the measuring instrument can be used for treatment of femoral neck fracture, femoral head necrosis, hip osteoarthritis, hip ankylosis, hip rheumatoid arthritis, acetabular dysplasia, hip primary / metastatic bone tumors, and other severe hip bone lesions with joint destruction.

The invention discloses a femoral neck bidirectional pressurizing distance-limiting sliding screw and a screwdriver, and relates to the technical field of medical instruments. The femoral neck bidirectional pressurizing distance-limiting sliding screw comprises an inner core, wherein the head of the inner core is provided with a first external thread; an outer sleeve, wherein the tail of the outer sleeve is provided with a second external thread, the thread pitch of the second external thread is different from that of the first external thread, the tail of the inner core is connected with the head of the outer sleeve through a connecting structure and can slide relative to the axial direction, and the outer sleeve is provided with a distance limiting structure to limit the relative sliding distance between the inner core and the outer sleeve; and a connecting part, which is arranged at the tail of the outer sleeve. The first external thread of the inner core and the second external thread of the outer sleeve can enable the fracture end of the femoral neck to play a bidirectional pressurizing role in the process of entering the proximal femur through the double-thread structure, and the stability of the fracture end is improved.

The invention discloses a femoral neck fracture fixing device which comprises a long and narrow plate body capable of being implanted into a femoral neck so that the two side edges of the plate body can abut against the inner wall of the neck portion of the femoral neck, the outer end of the plate body is connected with a fixing base, a fixing hole is formed in the fixing base, a fixing wire is sleeved with the fixing hole, and the two side edges of the plate body can be provided with blade portions respectively. After the plate body is implanted into the femoral neck, the plate edge can be cut into the inner wall of the neck of the femoral neck. The femoral neck fixing device can be rapidly assembled, and the aim of fixing the femoral neck is achieved. Corresponding fixing plates can be selected according to different fracture parts. The fixing plate can be clamped and fixed to the narrow area of the neck through the fixing plate, and the fracture far end and the fracture near end can be kept corresponding in position and do not swing or twist.

The invention discloses an injectable screw fixation system for femoral neck fractures, wherein the injectable screw fixing system comprises a screw, a hollow guide rod and a double-channel high-pressure injection device; the screw comprises a screw body and a screw seat, a central through hole is formed in the screw body, screw body external threads are arranged on the outer wall of the front section or the whole section of the screw body, and a side hole communicated with the central through hole is formed in the side wall of the front section of the screw body; the screw base is integrally connected to the tail end of the screw body, a polygonal hole is formed in the screw base, and screw base external threads are arranged on the periphery of the screw base; a guide rod internal thread is arranged at the front end of the hollow guide rod; a guide rod external thread is arranged at the rear end of the hollow guide rod; the double-channel high-pressure injection device comprises a three-way connector and two high-pressure injectors, the three-way connector is provided with two inlets and an outlet, the two inlets are connected with the two high-pressure injectors respectively, a control valve is arranged on the three-way connector, and the outlet is used for being connected with the rear end of the hollow guide rod. According to the invention, treatment liquid can be effectively injected into a fracture part, clinical technical obstacles are practically solved, and the operation curative effect is improved.

The invention relates to the technical field of medical instruments, in particular to a three-fork type internal fixing device for treating femoral neck fracturs. The three-fork type internal fixing device comprises a side fixing plate, a first femoral neck locking screw, a second femoral neck locking screw, a third femoral neck locking screw and a femoral shaft fixing screw; the head end of the first femoral neck locking screw penetrates through a first threaded locking hole and then is fixed into the femoral head via the femoral neck; a first side hole and a second side hole are formed in the first femoral neck locking screw; and the head end of the second femoral neck locking screw sequentially penetrates through a second threaded locking hole and the first side hole and then is fixed into the femoral head via the femoral neck. The three-fork type internal fixing device is reasonable and compact in structure, the three femoral neck locking screws are mutually connected and locked, and the three femoral neck locking screws and the side fixing plate are locked to form a mechanically stable three-dimensional space structure, so that stress dispersion is uniform, and femoral head rotation, femoral neck collapse, introversion deformity, screw displacement and femoral head cutting can be effectively prevented.

The embodiment of the invention relates to an anatomical femoral neck fracture extramedullary fixing steel plate and a fixing system. The fixing system comprises a fixing steel plate, femoral neck fixing nails, femoral neck lag screws and locking screws. The anatomical femoral neck fracture extramedullary fixing steel plate comprises a first fixing part and a second fixing part which are connected, wherein the first fixing part comprises a first positioning hole, a first oblique insertion screw hole, a second oblique insertion screw hole, a third oblique insertion screw hole, a combined tension screw hole and a second positioning hole, and the first fixing part, the femoral neck fixing nails and the femoral neck lag screws are used in cooperation; the second fixing part comprises a fixingscrew hole and is used in cooperation with the locking screws. The near end of the fixing steel plate can ensure that at least three screws are placed into the femoral neck, the designed lag screw holes are used for pressurizing the fracture end, the designed positioning screw holes are used for avoiding screw retreating and plate retreating, two kirschner wire holes are used for rapid positioningand temporary fixing, surgical operation is faster, more reliable and more reasonable, and fracture healing is promoted to the maximum extent.

The invention discloses a reduction support structure for femoral neck fractures. The reduction support structure comprises a locking steel plate, a sleeve and first screws; the inner surface of the locking steel plate is curved to be matched with the femoral large trochanter; the locking steel plate comprises a steel plate head, a steel plate trunk and a steel plate tail; three first screw holesarranged in an isosceles triangle shape are formed in the locking steel plate, and the bottom edge of the isosceles triangle extends in the side edge direction of the locking steel plate; the sleeve is arranged in the first screw holes; the tails of the first screws are arranged in the sleeve. The reduction support structure can achieve stable reduction support for the femoral neck fractures; theoperation is simple, the reduction effect is good, and the injuries to patient are small.

The invention relates to the field of medical image processing, and discloses a method and system for detecting femoral neck fractures based on weakly supervised segmentation. , get the probability segmentation map P probability and femoral neck region detection image P detec ; Obtain the fracture type of the femoral neck region, and detect the image P of the femoral region detec Input to the constructed and trained classification network to obtain the type of femoral fracture; detec Input the constructed and trained weakly supervised segmentation network to obtain the segmented fracture image P seg ; Image fusion to obtain the image of the femoral neck fracture area, and the segmented fracture image P seg Detection image P with the femoral region detec Fusion is performed to generate an image of the femoral neck fracture area and output. The femoral neck fracture is segmented by weakly supervised segmentation method, which has high detection accuracy and high efficiency.

The invention relates to a femoral neck fracture reduction device and an application method thereof. The device includes a first fixed mount and a second fixed mount. One end of the first fixed mountis connected with a first connecting rod through a ball head pair. One end of the second fixed mount is connected with a second connecting rod through a ball head pair. The first connecting rod and the second connecting rod are rotationally connected and locked. The first fixed mount and the second fixed mount are respectively provided with rotatably adjustable bone nail clamps, and the first fixed mount and the second fixed mount are also respectively provided with traction mechanisms for side-to-side adjustment of the bone nail clamps. The femoral neck fracture reduction device can maintaintemporary fixation of the fracture and is simple for reduction.

The modified method of Biplane Double-supported Screw Fixation (Modified BDSF) (Calcar buttressed screw fixation) of femoral neck fractures is disclosed. BDSF is applied using three standard bone screws laid in two vertical oblique planes in the femoral neck: the inferior (distal) screw is placed at an obtuse angle in the posterior oblique plane, and touched on the inferior (distal) and on the posterior cortices of the femoral neck; the middle screw and the proximal screw are laid in the anterior oblique plane and in parallel to each-other, with the middle screw touched on the distal femoral neck cortex. With BDSF of the three screws, two are weight-bearing and act as console beams: the distal screw and the middle screw, each of them having two supporting points in the distal fragment: medial (on the distal femoral neck cortex), and lateral (in the place of screw entry into the lateral femoral cortex).

The invention relates to the technical field of femoral neck fracture recovery, and discloses a body position reminder device for femoral neck fracture patients, comprising: a fixing plate, a fixing frame is fixedly installed on the upper end of the fixing plate, and a limit block is fixedly installed on the upper surface of the middle part of the fixing frame; A limit plate is fixedly installed on the upper end of the limit block, a buzzer is fixedly installed on the upper surface of the fixed plate, a fixed block is fixedly installed on the upper surface of the buzzer, and support strips are fixedly installed on both sides of the upper end of the fixed block . Through the use of the buzzer, the fixed block, the support plate, the fixed rod, the clip and the clip frame, it can effectively remind the patient when the distance between the legs of the patient is not a normal and reasonable distance due to the flipping of the body position. The patient is restored to a lying state, which ensures the effective and rapid recovery of the femoral neck, and avoids the state where the two legs are not separated by a reasonable distance, which may easily lead to the dislocation of the hip prosthesis, making the healing more difficult and inconvenient for the patient's recovery.

The invention relates to a device for assisting closed reduction and needle placement internal fixation of femoral neck fracture, which comprises a fixing plate, and the fixing plate comprises a vertical plate and a horizontal plate; a first fixed clamping jaw assembly is fixedly arranged at one end of the first connecting rod, the first fixed clamping jaw assembly is connected with the base part of the fixed plate, and a second fixed clamping jaw assembly is fixedly arranged at the other end of the first connecting rod; a third fixed clamping jaw assembly is arranged at one end of the second connecting rod, and a holding hand is arranged at the other end of the second connecting rod; the holding hand is connected with the fixing plate through a second connecting rod. The defect that existing single foot traction and traction force are insufficient is overcome, any correction traction force in the inside-outside, up-down, longitudinal and rotating directions is jointly provided for the femoral neck fracture far end (thigh), satisfactory closed reduction of the femoral neck fracture is easily achieved, and favorable conditions are created for internal fixation of the fracture; the device can replace an operator to hold a tool, prevents the operator from being harmed by X-ray radiation during fluoroscopy, and is convenient to mount and dismount.

The invention provides a screw guider and a using method thereof.The screw guider comprises an inner guiding piece, an outer guiding piece, a first positioning pin, a second positioning pin, a first guide pin, a second guide pin and a third guide pin, the inner guiding piece comprises a fixing part and a measurer, the measurer comprises a connecting part, a first caliper and a second caliper, one end of the connecting part is connected to the fixing part, and the other end of the connecting part is connected to the second caliper. A first positioning groove and a second positioning groove are formed in the fixing part so that the first positioning needle and the second positioning needle can penetrate through and be inserted into the joint of the femoral head and the neck to be fixed, and a first positioning hole and a second positioning hole are formed in the outer guiding piece so that the outer guiding piece can be arranged on the first positioning needle and the second positioning needle in a sleeved mode. A first adjusting hole, a second adjusting hole and a third adjusting hole are formed in the outer guide piece, so that a first guide needle, a second guide needle and a third guide needle can be inserted into the femoral head respectively. According to the guider, the perspective frequency can be reduced, the hollow screw can be accurately implanted, and the requirements of parallelism, welt and inverted triangle are met.

The invention provides a reverse V-shaped hollow screw assembly for fixing femoral neck fracture. The reverse V-shaped hollow screw assembly for fixing femoral neck fracture is characterized by comprising a first parallel screw, a second parallel screw and an oblique screw which form a reverse V-shaped assembly at the proximal end of the femur; the first parallel screw and the second parallel screw are parallel to each other and are parallel to the bone cortex above the femoral neck, so that the upper tension resistance effect is achieved; the oblique screw is located under the first parallel screw and the second parallel screw and is arranged in the direction of the connecting line of the femoral head load bearing area and the femoral distance; and the lower anti-pressure effect is achieved. Through a reverse V-shaped method, the two screws parallel to the bone cortex above the femoral neck above the femoral neck achieve the anti-tension effect, and the long oblique screw at the lower side achieves the anti-pressure effect. According to the method, the tension-pressure load condition of a real human body is effectively simulated by placing the screws, the dynamic balance of tension and pressure is achieved, and healing of femoral neck fracture is facilitated.