44 results about "Bones femur" patented technology

A bone prosthesis for implantation at a joint is adapted to closely replicate the normal loading of the femur and is suitable for implantation using a single incision anterior approach, a form of minimally invasive surgery (MIS). The bone prosthesis comprises a stem adapted for orientation with a medial trabecular stream of the femur.

A bone fixation system has an elongate portion (122; 299) for engaging over a long bone (e.g. a femur) and an end engagement portion (120; 260) for engaging over an end region of a long bone (e.g. a greater trochanter). To allow for variation in bone geometries, the two portions are pivotably connectable. Preferably the connection is lockable. Thus the system can be adapted to a particular bone geometry and then made rigid.

A method for locating a guide wire axis on a femoral neck comprises the steps of tracking a position and orientation of a femur; registering a frame of reference with respect to the position and orientation of the femur from a first registration probe mounted onto the femur in a predetermined configuration, the frame of reference having preoperative planned data pertaining to the femoral neck; digitizing femoral neck data with respect to the position and orientation of the femur from a second registration probe positioned onto the femoral neck at desired orientations; calculating a position and orientation of the guide wire axis with respect to the position and orientation of the femur as a function of the preoperative planned data and the femoral neck data.

A targeting apparatus for the correction of the deformity in proximal femur of a child is disclosed and includes a retention assembly; a cylindrical nail retention member tapered toward its half-spherical bottom end and including an upper through hole, a lower through hole, and a top cavity having inner threads for releasably secured to the retention assembly; a first locking nail including a forward threaded portion, an enlarged head, and a retaining recess in the head thereof; and a second locking nail including a forward threaded portion, an enlarged head, and a retaining recess in the head thereof. The invention has the advantages of reducing the area of wound when implanting the locking nails in the femur and saving labor during surgery.

The invention discloses a bone trabecula hip joint system. The system comprises a series of bone trabecula assembled femoral components, caput femoris, bone trabecula oversleeves, bone trabecula assembled acetabular cups and bone trabecula acetabulum cushion blocks. The surface structures of the bone trabecula assembled femoral components, the caput femoris, the bone trabecula oversleeves, the bone trabecula assembled acetabular cups and the bone trabecula acetabulum cushion blocks are all metal bone trabecula structures and manufactured by means of the metal 3D printing technology, the structural form of holes and porosity can be accurately controlled, a plurality of specifications are available, and assembly can be conducted freely. The system has the advantages that fastness and effectiveness are realized, postoperation osseointegration is facilitated, service life is prolonged, postoperation revision rate is reduced, serious femur and acetabulum deformation is effectively solved, complicated joint primary replacement surgery and revision surgery under the condition of various forms of bone defects can be conducted, and the requirements of various patients for prosthesis customization are met.

The present invention essentially relates to a hip joint endoprosthesis stem for cement-free or cemented anchoring in bones that is anchored in the femural neck and in the proximal metaphysis and preserves the internal spongiosa and compact structures that reinforce the femur, that gives the design element axial access to the medullary canal, and possesses parabolically curved outer surfaces to optimize the transfer of force to the bone.

The invention relates to an interlocking nail (10) for fixation of transverse and short spiral fractures of, long bone, particularly shaft of the femur, tibia and humerus, having Graft extrusion space / slot (101) for holding stem cells graft and 4 or 5 holes for putting interlocking bolts from lateral to medial direction. Constant compression achieved (irrespective of weight bearing cycle) at the fracture site by tightening of the Endo-Compression Screws (108, 109 and 110) results in stimulation of stem cells and reduction in bone gap, thus enhances bone healing and union manifolds.

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 intramedullary nail special for children, which comprises a nail sleeve and a nail core, the far end of the nail core is provided with a first locking hole, the far end of the nail core is driven into the femoral marrow and penetrates through the growth plate at the lower end of the femur, a kirschner wire or a screw is driven at the epiphysis to enter the first locking hole to lock the nail core, the far end of the nail sleeve is driven into the femoral marrow from the greater trochanter at the proximal end of the femur to reach the metaphysis without passing through the growth plate, the nail sleeve is sleeved on the nail core, the near end part of the nail sleeve is arranged outside the femur, a second locking hole is formed in the nail sleeve, and a screw is screwed into the second locking hole through the skin to lock the nail sleeve. The intramedullary nail is applied to the distal femoral fracture of children, can be extended, prevented from rotating and locked, and can fix the fracture and retain the normal growth function of the growth plate.

The invention discloses a construction method of a radioactive cell damage model. The method comprises the following steps: extracting bone marrow mesenchymal stem cells from bone marrow of femur andtibia of a young SD rat, and culturing and transferring the cells to a third generation; identifying the third generation of bone marrow mesenchymal stem cells; irradiating the bone marrow mesenchymalstem cells with gamma rays of a cobalt 60 radioactive source, wherein the irradiation dose gradient is 2,4,6 and 8 Gy, and the gamma ray dose rate is controlled at 2.538 Gy / min; carrying out integralcalculation on the boundary effect in the process of raising and lowering the source, so that the accumulated irradiation dose actually born by the bone marrow mesenchymal stem cells reaches the setdose; and according to proliferation capacity and apoptosis degree of the bone marrow mesenchymal stem cells, in combination with the screening detection of the living cells, screening and detecting the bone marrow mesenchymal stem cells according to select the bone marrow mesenchymal stem cells irradiated with specific gamma ray irradiation dose as a radioactive damage model. The method providesthe cell model with higher reliability and repeatability for the future research of ionizing radiation damage effect, radiation protection and related diseases of organisms.

This present invention discloses yeast hydrolysate to increase bone lengths such as growth plate, tibia, femur, etc. and weight and to stimulate growth hormone release. According to one aspect of the present invention, the yeast hydrolysate acquired by the processes including a hydrolysis step to add 0.1 to 3 % (w / v) of proteases to yeast or of autolysis substance of yeast; and a separation step to separate materials with the 10,000-30,000 Dalton molecular weight from the' supernatant of the said yeast hydrolysate is suggested. The said yeast hydrolysate is safe and has no side effect for intake.

The invention discloses shapeable bone sponge for orthopaedic filling and a preparation method thereof, wherein the shapeable bone sponge comprises a bone sponge material, and the bone sponge material comprises a cortical bone of the middle section of a tibia or a femur of a qualified human donor. The cortical bone is subjected to cleaning, degreasing, virus inactivation, demineralization, forming, freeze-drying, screening, viscidity, neutralization, centrifugation and irradiation sterilization to obtain the bone sponge material. The bone sponge material has the shapeable characteristic, and can be shaped at will according to the shape of a clinical bone defect; the reticular structure is beneficial to the entry of osteoblasts; the exposure of the bone induction protein can promote the formation of bone tissues; and the bone defect healing is accelerated, and good application prospects are achieved in the orthopedic surgery.

A device for preparing a femur of a patient for receipt of a knee implant in both extension and flexion relative to a resected tibia plateau based on applying tension to medial and lateral collateral ligaments of said patient, comprising a tibial baseplate, a tensioner, the tensioner comprising a tensioner body having a tensioner portion, the tensioner portion affixed to the tibial baseplate, and an expander arm comprising an elongated body portion, a superior side of the elongated body portion having a spiked tip adjacent a posterior end thereof. The spiked tip interacts with an intracondylar notch under tension. The expander arm is operatively connected to the tensioner body via the tensioner portion, the tensioner portion configured for use in selectively raising and lowering the expander arm relative to the tibial baseplate to apply tension to the medial and lateral collateral ligaments in extension or flexion.

The invention discloses a minimally invasive treatment proximal femur comminuted fracture inside and outside marrow united fixing system. According to the minimally invasive treatment proximal femur comminuted fracture inside and outside marrow united fixing system disclosed by the invention, pins are placed in a minimally invasive manner through guiding sleeves, and all the guiding sleeves correspond to intramedullary pins and a proximal femur fixing plate, so that the purpose of treating without splitting the fracture position is achieved; and proximal femur comminuted fracture is treated bythe minimally invasive treatment proximal femur comminuted fracture inside and outside marrow united fixing system, minimally invasive treatment proximal femur comminuted fracture inside and outsidemarrow united fixing system is simple to operate, small in incision, good in integral fixing effect, reliable in tensioning, free from loosening, free from potential safety hazard after being used fora long term, favorable for accurate restoration , free from deformation, and good in treatment effects.

The invention relates to a porous functional gradient structure support, in particular to a preparation method of a customizable and degradable 3D printing bone implant. The size is designed according to image data of the middle end of a femur obtained through CT scanning, and a metal mixed material serves as a porous bone support material; a matched protective plate is printed by adopting hydroxyapatite contained in a skeleton and mixed with shell powder and the like as main raw materials, the porous scaffold printed by the invention adopts an annular multifunctional gradient structure, the porosity is gradually reduced from outside to inside, the size of a porous implant can be flexibly arranged according to the skeleton damage condition, and the porous scaffold is suitable for repairing moderate and severe skeleton damage and has a good application prospect. And meanwhile, the material has good buffering and protecting effects on damaged parts of bones, and has the advantages of being degradable, high in biological activity and capable of well promoting bone cell formation.

The invention relates to the field of medical instrument design, in particular to a unicompartmental prosthesis matched with a posterior condyle of a femur, which comprises a joint friction surface, a bone cement binding surface, a distal condyle binding surface and a posterior condyle binding surface of the femur condyle which are integrally formed, the joint friction surface, the bone cement binding surface and the distal condyle binding surface of the femur condyle are three concentric spherical surfaces with different radiuses, the curvature radius RI of the joint friction face is larger than the curvature radius RII of the bone cement binding face, the curvature radius RII of the bone cement binding face is larger than the curvature radius RIII of the femoral condyle far-end binding face, and the femoral condyle posterior condyle binding face is a vertical plane and intersects with the femoral condyle far-end binding face to form an osseointegration face to be matched with a matched bone. According to the product provided by the invention, by changing the design of the bone binding surface of the single-condylar prosthesis, the movable single-condylar prosthesis is more adaptive to the posterior condyle of the femur, and the flexion and extension balance of the knee joint is more accurate, so that postoperative complications are reduced.

The invention discloses a dynamic pressurizing device for bone trauma repair. The dynamic pressurizing device comprises a bone fracture plate with the inner surface cooperating with the shape of the lower part of the greater trochanter of the femur, screw holes formed in the bone fracture plate a pressurizing screws inserted in the screw holes, wherein the central axis of each screw hole inclines upwards; each screw hole comprises a bowl-shaped lower part and a cylindrical upper part, a clamping structure is arranged at the end, close to the inner side of the bone fracture plate, of the lower part, and the upper part is of an unthreaded hole structure; the lower part of each pressurizing screw is a locking structure cooperating with the clamping structure, and the upper part of each pressurizing screw is a non-locking structure capable of moving in the corresponding screw hole; and locking holes are further formed in the positions, located on the lower parts of the screw holes, of the bone fracture plate, and locking nails are arranged in the locking holes in a penetrating mode. The dynamic pressurizing device can play a certain role in protecting soft tissues such as muscles around the femur, and can also improve the fixing effect of the femur.

The invention relates to a bone taking and grafting beating device for a femoral marrow opening, which comprises an outer-layer bone taking sleeve and an inner-layer beating device, the outer-layer bone taking sleeve is a hollow sleeve, and a bone taking trephine is arranged at the head end of the hollow sleeve; the inner-layer beating device is a solid columnar beating device, and the head end of the solid columnar beating device is a planar beating device head; the outer-layer bone taking sleeve is used for taking bones and storing the taken bone blocks in the hollow sleeve; and the diameter of the solid columnar beating device is matched with that of the hollow sleeve, so that the solid columnar beating device can be inserted into the hollow sleeve, and the bone block stored in the hollow sleeve is beaten into a femoral marrow opening in the process of inserting the solid columnar beating device into the hollow sleeve. The bone taking and grafting beating device has the functions of taking bones and grafting bones, can smoothly and quickly complete the operations of taking the bones and grafting the bones, realizes good bony filling for the femoral marrow opening, saves the time for trimming and splicing bone blocks, and is convenient to operate and high in practicability; and the adopted tools are simple and convenient, and are convenient to carry and disinfect.

The invention relates to an inhaul cable type tension bone trabecula reconstruction type proximal femur intramedullary nail which comprises an anchoring part, a traction cable and a fixing part. A main thread and an auxiliary thread are arranged on the outer surface of the anchoring part; the bottom center of the anchoring part is connected with a traction cable, and the other end of the traction cable is connected with the center of one end of the fixing part; a first connecting part is arranged on the end surface of the anchoring part; the fixing part is provided with a second connecting part; the first connecting part and the second connecting part are detachably connected, so that the anchoring part and the fixing part work cooperatively, and separation of the anchoring part and the fixing part is not hindered. According to the invention, the anchoring part and the fixing part are fixed in the bone and are locked through the traction cable; the device can be implanted in any direction according to operation requirements; multi-group implantation can be realized, and independent work can be realized; a tension bone trabecula after fracture is reconstructed, and the bone trabecula and a pressure bone trabecula play a role together, so that the stability of fracture repair is improved together; and the influence on fracture healing and recovery caused by redisplacement after functional activity is effectively prevented.

The invention discloses a bone holder for femoral subtrochanteric osteotomy, which comprises a bone holding plate and a plurality of bone holding clamps, one ends of the bone holding clamps are provided with fixing parts fixed with the bone holding plate, when the fixing parts are loosened, the bone holding clamps slide relative to the bone holding plate, and after bone blocks are cut off, two flat anastomotic surfaces can be provided, so that the bone blocks can be cut off. The device is used for clamping the wounded femur, and rotation of the broken ends of the femur during splicing is avoided.

A method of bone fixation includes placing a bone plate adjacent to a lesser trochanter on a medial aspect of a femur such that at least a portion of the lesser trochanter is positioned between appendages of the bone plate, wrapping cables coupled to the bone plate about a first and second bone fragment of a proximal femur, and tightening the cables to secure the first and second bone fragments together.