18 results about "Medullary cavity" patented technology

The application provides a controllable self-expanding intramedullary nail internal fixation system for long bone fracture, belonging to the technical field of orthopedic medical instruments, and comprising a self-expanding intramedullary nail, a visible controllable self-expanding platform and a locking nail; the self-expanding intramedullary nail comprises a locking hole and an expandable support; the locking hole is arranged at the proximal end of the self-expanding intramedullary nail and is matched with the locking nail to fix the proximal end of the self-expanding intramedullary nail; the expandable support is arranged at the distal end of the self-expanding intramedullary nail after expansion to fix the distal end of the self-expanding intramedullary nail. The visible controllable self-expanding platform is in communication with the expandable support and can display the expansion size, and the self-expanding intramedullary nail can be prevented from being expanded too large to affect the medullary cavity by precalculating the expansion size.

The application provides a femoral stem prosthesis and a hip joint prosthesis with the same, wherein the femoral stem prosthesis comprises: a mounting block comprising a first block body and a second block body, the second block body being arranged on the side of the first block body, and the first block body and the second block body being capable of relative movement; a guide structure arranged between the first block body and the second block body, the guide structure extending along the axial direction of the first block body; a locking assembly arranged between the first block body and the second block body to fix the first block body and the second block body; a support column swingably arranged on the second block body, and an acetabular component arranged on the support column; and a fixing mechanism arranged below the first block body and capable of being inserted into the medullary cavity. The technical scheme of the application effectively solves the problem that the relative position of the neck stem of the femoral stem and the stem body cannot be adjusted in the related art.

Provided herein are methods and systems for stabilizing a joint, such as the elbow. The system may include an intramedullary rod configured to be placed in a medullary canal of a bone, a pin, a linking member defining an aperture for receiving the pin, and a connector defining a first aperture and a second aperture, the first aperture configured to receive the linking member. The system may further include a screw extending through the second aperture of the connector and the aperture of the intramedullary rod. The system may be configured to be implanted into a patient.

The application relates to a medical orthopedic quick drill bit, which comprises a drill bit body composed of a drill bit part and a drill rod part, wherein the drill bit part is provided with circularly arranged cutting edges for bone positioning and hole forming, and the drill rod part is designed as a light rod; a connecting piece is connected with the drill bit body at one end and fixed with a driving piece at the other end, and the two are quickly separated through a split device containing a clamping piece and a disengaging piece, so that safe disconnection is ensured when the pressure of the medullary cavity or cancellous bone is abnormal. The application has the technical effects of improving the operation efficiency, enhancing the safety and reducing accidental injuries.

The application discloses a prosthesis capable of fixing a proximal femur in hip joint revision surgery and relates to the technical field of medical devices.The prosthesis comprises a femoral stem body and a dynamic auxiliary structure.The dynamic auxiliary structure comprises a side groove, a counterweight and a limiting seat.The side groove is provided through the wide side of the femoral stem body.The two side ports of the side groove are provided with elastic plates, and the side groove is provided with a guide rod.The counterweight is movably sleeved on the guide rod.A traction spring is arranged between the top of the counterweight and the end of the side groove.The two sides of the counterweight are embedded with protrusions.The limiting seat is arranged on the inner wall of the side groove and located on the two sides of the counterweight.A guide column is slidably arranged through the limiting seat, and the end of the guide column close to the counterweight is provided with a transmission seat corresponding to the protrusions.The prosthesis can reduce the micromotion of the prosthesis and the femoral medullary cavity, promote bone ingrowth, reduce the incidence of long-term loosening, activate osteoblast activity, inhibit osteoclast proliferation, maintain the bone mass around the prosthesis, and prolong the service life of the prosthesis.

This application discloses an automatic analysis method for CT images of long bones in mice and rats, relating to the field of image processing technology. The method includes: acquiring a CT image sequence of the target long bone, extracting the three-dimensional spatial distribution of bone tissue, and performing pose alignment and three-dimensional cropping to obtain a standardized bone image sequence; then constructing candidate depth intervals based on butterfly-shaped anatomical features and key points of growth plate strip-shaped gaps, respectively, and obtaining a fine search range through intersection operation; subsequently identifying candidate slices of triangular fractures and determining the anatomical zero point; finally, mapping the target analysis region based on the anatomical zero point, completing cortical bone segmentation, medullary cavity segmentation, and trabecular bone extraction under closed mask constraints, and outputting quantitative parameters of bone tissue. This application achieves accurate positioning of the growth plate and unified analysis region mapping in long bone CT images, improving the accuracy of trabecular bone extraction and the consistency of bone tissue quantification results.

The utility model discloses a kind of hip joint prostheses for retaining femoral greater trochanter, including femoral proximal end prosthesis, bone healing structure, connecting rod and femoral stem. Femoral proximal end prosthesis includes femoral neck prosthesis and greater trochanter connecting part, preset included angle is formed between the two, greater trochanter connecting part is used for resetting retained femoral greater trochanter;Bone healing structure is arranged at the outside of preset included angle, and is connected with retained femoral greater trochanter by bone growth mechanism;Connecting rod is connected with the bottom end of femoral proximal end prosthesis;Femoral stem is connected with the bottom end of connecting rod, for inserting into femoral medullary cavity.In installation process, perfect femoral greater trochanter does not need to be removed, femoral greater trochanter is successfully retained, so that patient's gluteus medius and vastus lateralis muscle can be retained, the destruction to the stop of gluteus medius and vastus lateralis muscle is avoided, so as to improve the functional recovery effect after operation. The connection of hip joint prosthesis and retained femoral greater trochanter is realized by bone healing structure, and the stability and durability of connection are improved.

The utility model discloses a kind of absorbable rib fixation nails, made of high molecular absorbable material integrated, including shank part and the clamping portion of both ends of shank part, clamping portion is equipped with bifurcation structure with opening towards non-connection shank part one end, at least one branch outside of bifurcation structure is equipped with inverted tooth structure, inverted tooth structure end is conical or triangular, the width of bifurcation structure is greater than the width of shank part.The utility model can be made into nail body by absorbable material, clamping portion end bifurcation, inverted tooth structure can be fixed after being expanded in marrow cavity and increasing friction, wide conical end is easily placed into marrow cavity and can play anti-rotation, anti-removal effect, fixed firm and not easy to displace, without suture reinforcement to prevent affecting periosteal blood supply and nerve compression, after fracture healing, fixation nail can be degraded and absorbed, without secondary operation removal, after absorption, chest CT, MRI examination has no influence, more promotional, can better improve the user's use experience.

Devices, systems, instruments, and methods for promoting healing and stability for bone fractures. A targeted interlocking plate-nail system may include an intramedullary nail configured to extend through a medullary canal of a long bone, a bone plate configured to be positioned against an exterior surface of the long bone, and a plurality of fasteners configured to extend through the bone plate, through the intramedullary nail, or through both the bone plate and the intramedullary nail, thereby interlocking the bone plate and the intramedullary nail together. Targeting instruments may be used for guiding the components into position.

The present application relates to the technical field of orthopedic medical devices, and particularly relates to a distal femoral fracture medial column support anti-rotation intramedullary nail system, which comprises a main nail configured to be implanted into the femoral medullary cavity from the medial condyle of the femur, extends along its axial direction and has a tail part and a head part; the tail part is provided with an anchoring part for anchoring in the cancellous bone inside the medial condyle of the femur, and the head part is provided with at least one first locking hole; a tension nail configured to be transversely implanted from the medial condyle of the femur to the lateral condyle of the femur and to pass through the tail part of the main nail, for connecting the medial condyle of the femur with the lateral condyle of the femur; and a locking nail configured to pass through the first locking hole of the head part of the main nail, for anchoring the head part of the main nail in the boundary area of the cortical bone and cancellous bone of the lateral condyle of the femur. The intramedullary nail system provides reliable medial column axial support and anti-rotation stability for the distal femoral fracture through minimally invasive implantation from the medial condyle of the femur.

Provided is a method for manufacturing a prosthesis for a fractured long bone of a patient. The method includes: providing data representative of the fractured long bone of the patient, the fractured long bone comprising a diaphyseal fragment comprising a medullary cavity; based on the data provided, designing the prosthesis specifically to the patient, wherein the prosthesis comprising a stem part configured to be inserted into the medullary cavity for securing the stem part to the diaphyseal fragment.

The present application relates to a kind of tibial platform prostheses, mainly including tibial spacer, tibial platform and sleeve.First fixed block and three arc-shaped holes are provided in tibial spacer, and movable second fixed block is matched in hole.Tibial platform includes platform support with hole and shell, and shell side and bottom are provided with hole.Screw is inserted into shell through spacer and platform support, and outer side thread is engaged with inner thread of sleeve, and when rotating, it can drive sleeve to move up.Sleeve moves up through articulated connecting rod system from shell side hole, and deeply into medullary cavity to enhance fixation.Spring drive first pusher is provided in screw, and it can be matched with recess of sleeve to prevent downward movement;At the same time, second pusher in screw can be extended into medullary cavity from bottom through thread.The design realizes multidirectional fixation, and improves the stability of prosthesis.

The application discloses a kind of photodynamic bone stable balloon and system, belong to medical instrument technical field, including outer balloon and inner balloon;Between outer balloon and inner balloon, there is injection liquid outer cavity;Injection liquid outer cavity is used to inject the photosensitive liquid containing initiator;Inner balloon has operating inner cavity, and operating inner cavity is used to make optical fiber enter;Optical fiber is used to transmit light energy, to activate initiator to initiate photosensitive liquid polymerization;Outer balloon has non-compliant balloon section and compliant balloon section in axial direction, at least one non-compliant balloon section is used to correspond the fracture crack in medullary cavity, and compliant balloon section is used to adaptive expansion at the variable diameter area in medullary cavity, solve the contradiction of " over-compliance leads to uncontrolled expansion, bone injury " and " insufficient compliance leads to poor fit, axial sliding ".

The application provides a self-expanding angle type bone plate fixing system and method for femoral neck fracture, and belongs to the technical field of orthopedic medical instruments, and comprises an angle type bone plate, a self-expanding compression screw, a self-expanding locking screw and a visible and controllable self-expanding platform; the self-expanding compression screw is inserted into a pre-hole formed in the femoral neck; one end of the angle type bone plate is fixedly connected with the self-expanding compression screw; the self-expanding locking screw is used for fixing the angle type bone plate and the femur; and the visible and controllable self-expanding platform is used for controlling the expansion size of the self-expanding compression screw. The self-expanding compression screw and the self-expanding locking screw can firmly fix the angle type bone plate on the femur, the situation of screw backout and femoral head rotation can be avoided, the size of the self-expanding can be accurately controlled by using the visible and controllable self-expanding platform, and the expansion is prevented from being too large to damage the blood supply of the medullary cavity.