70 results about "Femoral fracture" patented technology

The invention discloses an individualized femoral fracture reduction model construction method. The method comprises the steps that based on the parameterized femoral surface model construction technology, an equalized femoral deformation template is created, femoral anatomical feature points and reference points are defined, a patient's femoral simplification model is created, and an individualized approximation model is constructed; each anatomic point set in the femoral simplification model is subjected to registration of each corresponding anatomical point set in the approximate femoral model, then a deformation matrix is solved, and the automatic reduction of a corresponding fracture segment in the fracture model is achieved; a fracture profile of each fracture segment in the fracture simplification model is extracted, and projection interception are performed on each corresponding surface in the approximate femoral model, wherein each surface is smoothly connected with the adjacent surface, and a patient's individualized femoral fracture reduction model is construct. The method can construct the individualized fracture model intuitively and promptly through patient's femoral fracture segment reduction and comminuted part surface reconstruction, and has an important guiding significance to the guidance of femoral fracture surgical treatment and patient's bone plate individualized design in an orthopedic surgery by a doctor.

The invention discloses a three-dimensional finite element constructing method based on medical image data LISS-DF to cure distal femur fracture. CT tomography is utilized to obtain the tomographic image data of an LISS steel plate and the tomographic image data of the normal sheep femur, three-dimensional medical images are divided, outline characteristic points of the three-dimensional medical images are extracted out, data are output, a surface geometrical model is initially constructed, a three-dimensional solid geometrical model is constructed, a solid geometrical model generated based on the medical images is established, the geometrical model generated based on the medical images is edited, a screw solid geometrical model generated based on the screw setting principle is established, a three-dimensional finite element model is constructed, and finally a plurality of three pyramid finite element models are generated to cure femoral fracture through different combined fixing methods between the sheep femur and near-end screws. The constructing method can form the three-dimensional finite element model containing the complete sheep femur, the distal femur fracture and the LISS-DF steel plate and the three-dimension finite element model providing the different combined fixing method for the single cortex and double cortexes of the near-end screws of the steel plate to cure the distal femur fracture. The constructing method can quickly and accurately construct the three-dimensional finite element model to cure the distal femur fracture through different combined fixing methods of the single cortex and the double cortexes of the near-end screws of the LISS-DF steel plate. Thus, the model constructing speed and the model quality are greatly improved.

The invention relates to a periprosthetic femoral fracture revision locking steel plate. The periprosthetic femoral fracture revision locking steel plate is provided with a U-type body with the shape matched with that of the thighbone. The body can be made of titanium alloy or vitallium. A first contracting part is arranged at the bottom end of the body. Each of the two sides of the body extends to form two wings, and the wings comprise the first wing, the second wing, the third wing and the fourth wing. The body and the wings are provided with a plurality of nail holes. The near end of a fracture can be fixed at multiple angles, the width of the steel plate does not need to be increased, and the screw bonding force, and the bending resisting force and rotating resisting capacity of the steel plate are all higher than those of any former fixing material. By means of locking design, blood supply damage caused by the fact that a steel plate is too closely attached to the bone face and the periosteum and soft tissue are excessively stripped can be avoided. The force arm of the steel plate is long, and by means of dispersed fixing, steel plate breakage caused by stress concentration or bone ununion caused by stress shielding can be avoided. The minimally invasive percutaneous steel plate internal fixing technology is used in cooperation, and therefore soft tissue injuries can be further reduced.

The invention relates to a femoral fracture traction apparatus with good reduction fixing effect and belongs to the technical field of orthopedic surgical instruments. The femoral fracture traction apparatus is used for traction of femurs in surgeries to recover, adjust and maintain lengths of the femurs effectively. According to the technical scheme, the femoral fracture traction apparatus is composed of a near-end fixing screw, a connecting rod, a traction bow and a fixing needle, wherein a connecting end of the near-end fixing screw is connected with one end of the connecting rod, a rotating structure for adjusting lengths is arranged in the middle of the connecting rod, the other end of the connecting rod is connected with the traction bow, and the traction bow is connected with the fixing needle. According to the femoral fracture traction apparatus, the near-end fixing screw is fixed at the near end of a femur, the fixing needle and the traction bow are fixed at the far end of the femur, the connecting rod is connected in the middle, the distance between the near end and the far end of the femur is adjusted through rotation of the connecting rod so as to reduce shortened fracture, and the length of the femur is maintained and controlled effectively. As a high-effectiveness device in clinical surgeries, the femoral fracture traction apparatus is simple in structure, convenient to use and capable of generating tremendous reduction power and solves the problem of reduction difficulty in femoral fracture surgeries.

The invention provides a hip joint correction and thighbone extender, consisting of a bone external fixation support, a steel needle fixation clamp connected to the bone external fixation support, and a steel needle clamped in the steel needle fixation clamp, wherein the bone external fixation support consists of a far side support and a near side support, the far side support comprises a far end hole C-shaped ring, a near end hole C-shaped ring arranged above the far end hole C-shaped ring, and a plurality of traction rods connected between the far end hole C-shaped ring and the near end hole C-shaped ring, and the near side support comprises one to two tubular connecting rods connected above the near end hole C-shaped ring, and an arc-shaped bow connected between the tubular connecting rods and the near end hole C-shaped ring. The hip joint correction and thighbone extender has three functions of hip joint correction, femoral fracture treatment and thighbone extension, meets the mechanics biological environment of truncation bone correction and fixation and thighbone slow extension, and is favorable for growth of new bones and function optimization and rebuilding during fracture healing and limb extension.

The present invention concerns a device (1) for allowing the application of a fixing plate (20) on a compression screw (10) in a bone fracture, in particular a femoral fracture. In accordance with the invention, a generally long-shaped element (1) is included, provided on one of its ends (2) with fixing means (4, 16, 6) for rendering applicable the device to the end (13) of the compression screw (10). On the opposite side, a bevel (3) is included, configured in such a way as to realize a stress for the insertion in use of the plate when the channel of the plate is not in axis with the screw.

An interlocking intramedullary rod assembly for treating a fracture of a bone, the interlocking intramedullary rod assembly comprising: an intramedullary rod comprising a distal section and a proximal section; a distal interlocking screw comprising a distal end and a proximal end; and a proximal interlocking screw comprising a distal end and a proximal end; wherein the distal section of the intramedullary rod comprises a static distal seat for receiving the distal interlocking screw, and the proximal section of the intramedullary rod comprises a dynamic proximal seat for receiving the proximal interlocking screw; and further wherein the static distal seat is configured to secure the distal interlocking screw to the intramedullary rod such that the distal interlocking screw cannot move relative to the intramedullary rod, and the dynamic proximal seat is configured to secure the proximal interlocking screw to the intramedullary rod such that the angle between the distal end of the proximal interlocking screw and the proximal section of the intramedullary rod can be reduced but not increased. The proximal interlocking screw can provide dual plane compression at the fracture site, which includes linear compression at the fracture site and angular compression at the fracture site. The angular compression can be effected either during the surgery or after the surgery when the patient weightbears.

The invention belongs to the field of medical equipment, and particularly relates to an anti-rotation intramedullary nail system of a proximal femoral bionic arm reconstruction support. The anti-rotation intramedullary nail system comprises a main nail and a pressure nail, and is characterized by further comprising at least one tension nail, wherein the main nail, the pressure nail and the tensionnail form at least one triangular support structure, a near end section and a far end section of the main nail are integrally formed, the near end section is provided with a first nail hole and a second nail hole, the first nail hole fixes the tension nail, and the second nail hole fixes the pressure nail. The anti-rotation intramedullary nail system has the beneficial effects that the system isconsistent with anatomy of the femoral medullary cavity in a lateral position, the main nail of the side bent proximal femoral anti-rotation intramedullary nail can be lengthened even to the overall length of the femoral medullary cavity, and then the system can be used in femoral shaft fracture and multiple femoral fractures, thereby enlarging the use scope; the system effectively prevents the hip joint from inverting, femoral neck from shortening, femoral part from displacing inwardly, and femoral head and neck from rotating and deforming, an internal fixing device is prevented from breaking, loosing and releasing from the femoral neck internal fixing device, a power screw or a screw blade is prevented from cutting out, and femur stress fracture is prevented.

The invention relates to a fracture fixer, in particular to a combined single-side double-arm adjustable clamping bone pressurization fixer for multi-segmental femoral fracture and solves the problem that fracture is not easy to heal due to too big size, excess weight and poor flexibility of an existing external fixation support for fracture. The fixer comprises a pressure-adjustable retractable fixer and a plurality of steel nail fixing devices and is characterized by comprising a first supporting arm, a second supporting arm and a plurality of strengthening connection clamps, wherein the second supporting arm comprises a left arm body and a right arm body, the left arm body is embedded and inserted in the left side of the pressure-adjustable retractable fixer, the right arm body is embedded and inserted in the right side of the pressure-adjustable retractable fixer, the left arm body is connected with the first supporting arm through the strengthening connection clamps, the right arm body is connected with the first supporting arm through the strengthening connection clamps; the steel nail fixing devices are mounted on the first supporting arm or the second supporting arm. Steel nails can penetrate through each segment of the multi-segmental fractured femur for external fixation, bones on the fractured segments can be pressurized, physiological pressure stress on the femur is recovered, firm and stable external fixation can be realized through single-side double-arm locking, and the cure rate is increased.

The invention discloses an artificial hip joint prosthesis handle for treating a periprosthetic fracture, and belongs to the technical field of orthopaedics medical apparatuses. The artificial hip joint prosthesis handle is used for treating the periprosthetic fracture generated after hip joint replacement. According to the technical scheme, a plurality of fixing holes are formed in the middle section and the distal end of the prosthesis handle and penetrate through the prosthesis handle from the outer side of the prosthesis handle to the inner side of the prosthesis handle, the length center lines of the fixing holes are perpendicular to the length direction of the prosthesis handle, and the multiple fixing holes are parallel. According to the artificial hip joint prosthesis handle, the fixing holes are reserved in the prosthesis handle, when the periprosthetic fracture generated after hip joint replacement is treated, a doctor can only use plate fixation, and cerclage wiring fixation is avoided. Steel plate fixing screws can penetrate through the reserved fixing holes to be fastened to an inner cortex and an outer cortex on the periphery of the femoral fracture, the good fixing effect is achieved, and mechanical stability is greatly improved. The artificial hip joint prosthesis handle is simple in structure and convenient to use; the fracture portion on the periphery of the prosthesis handle is stably and firmly fixed, the ideal operation effect is achieved, and recovery and functional recovery of a patient are quite facilitated.

The invention discloses a nested structure for reduction of femoral neck fractures. The nested structure comprises a sleeve and a first screw; the diameter of the first screw is matched with that of the sleeve; the tail of the first screw is arranged in the sleeve; the head of the first screw is of a threaded structure; the sleeve is composed of a sleeve head, a sleeve middle and a sleeve bottom;the sleeve middle is in double-headed thread arrangement; the sleeve bottom is of a hollow prism structure with a hexagonal outer edge and a circular inner edge. The nested structure is simple and flexible in structure; the problem of poor anti-rotation capability of a traditional DHS can be effectively solved; the production and use cost is low, and the large-scale application and popularizationare facilitated.

The embodiment of the invention relates to an assembled anatomical proximal femoral fracture intramedullary fixing device which comprises a proximal intramedullary nail, a proximal locking nail and adistal locking nail; the proximal intramedullary nail is of a rod-shaped structure and comprises a first fixing part, a transition part and a second fixing part; the proximal locking nail comprises atool bit, a connecting part and a sleeve; the shape of the proximal locking nail is matched with that of a second locking nail hole. The design of the appearances and the abduction angles of the firstfixing part and the transition part of the proximal femur intramedullary nail provided by the embodiment of the invention has extremely high matching degree with a proximal femur medullary cavity, different diameters and lengths can be selected, the intramedullary nail proximal part design avoids protruding out of the vertex of the greater trochanter, the distal forked structure design reduces the risk of stress fracture, and the proximal locking nail is provided with spiral blades with different lengths and central locking structures with different lengths, so that better restoration and more effective fixation between fracture ends are realized.

The invention provides an auxiliary resetting internal fixing device for femoral neck fracture. An internal fixing device body is at least provided with an arc fitting part matched with the inner sideof the femoral neck and used for auxiliary resetting and a fixing supporting part for fitting the far end of the fracture. The internal fixing device is characterized in that the internal fixing device body further comprises a tip arranged at the top of the arc fitting part and used for controlling the near end of the fracture to rotate. The auxiliary resetting internal fixing device for femoralneck fracture has the advantages of being simple in structure, easy and flexible to operate and the like. The problem is effectively solved that the shear force of the fracture part exists in the traditional surgery, the surgery time and recovery time are shortened, and the device has good social and economic benefits.

The invention discloses a proximal femoral fracture repair auxiliary combination device and auxiliary components thereof. The auxiliary combination device comprises a first auxiliary component, a channel generating element, a second auxiliary component, a spiral push rod and a third auxiliary device. The first auxiliary component is arranged on a specific position of a femur, one end of the first auxiliary component is formed with two penetrating-prevention plate guiding ports and a guiding needle guiding port for a guiding needle to pass through, and the two penetrating-prevention plate guiding ports are arranged at two sides of the guiding needle guiding port. The channel generating element forms two penetrating-prevention plate channels through the two penetrating-prevention plate guiding ports. The second auxiliary component sleeves the spiral push rod, the spiral push rod drives the second auxiliary component and a side bone plate, the side bone plate also sleeves the spiral push rod, and is close to the other end of the second auxiliary component. The third auxiliary device applies force to the two penetrating-prevention plates. Through an integrated instrument design, the proximal femoral fracture repair auxiliary combination device can be implemented and applied to a screw structure with penetrating-prevention plates simply, the implementing time can be greatly saved, and the patient's burden can be effectively reduced.

The invention provides an inside support structure for a medullary cavity suitable for strengthening internal fixation for a proximal femoral fracture. The inside support structure comprises a fixingplate, wherein at least two screw holes are formed in the fixing plate and are in a design of locking screw holes; the fixing plate is arranged inside a femoral medullary cavity and is attached to theinner side surface of a thigh bone; the fixing plate is fixed on the thigh bone through screws screwed in the screw holes; the inner side surface is one surface close to the inside of a human thigh;and unicortical or biocortical fixation can be carried out on medial cortex of the thigh bone. The problems that existing internal fixation for the proximal femoral fracture is insufficient in strength and poor in stability are solved. The inside support structure for the medullary cavity belongs to the technical field of intertrochanteric fracture repair.