13 results about "Internal bone fixation" patented technology

This invention provides an internal fixation device for cancellous bone, belonging to the field of medical device technology. It includes a fixation plate with a plurality of screw holes and positioning holes arranged in a linear array on its top outer wall; and a guide assembly connected to the fixation plate, used to guide the hollow self-drilling screws. By incorporating the guide assembly, this invention not only guides the hollow self-drilling screws, preventing them from deviating from their pre-operatively assessed position during insertion, thus affecting their fixation effect on the fracture site, but also holds the screws during the guiding process, preventing the screw head from tilting and protruding, which could cause skin irritation and affect postoperative recovery.

The invention provides a cancellous bone internal fixing device, and belongs to the technical field of medical instruments. Comprising a fixing steel plate, a plurality of screw holes and a plurality of positioning holes are formed in the outer wall of the top of the fixing steel plate, and the screw holes and the positioning holes are distributed in a linear array mode; and the guide assembly is used for guiding the hollow self-drilling screw, and the guide assembly is connected with the fixed steel plate. By arranging the guiding assembly, the hollow self-tapping screw can be guided, the situation that the fixing effect of the hollow self-tapping screw on the fracture position of a patient is affected due to the fact that the hollow self-tapping screw deviates out of the designated position of preoperative evaluation in the screwing-in process is avoided, the hollow self-tapping screw can be held in the guiding process, and the fracture position of the patient is not affected. In this way, the situation that the screw head protrudes due to inclination, skin irritation is caused, and then postoperative recovery is affected can be avoided.

The utility model relates to a patella internal fixation testing device which comprises a sample seat and a testing machine, the sample seat is provided with a seat body, a supporting frame, an outer fixing cylinder and an inner fixing cylinder, the outer fixing cylinder is fixedly connected to the seat body, and the supporting frame is arranged on the seat body; the inner fixing cylinder is detachably mounted in the outer fixing cylinder; the testing machine is provided with a power output end and is configured to provide a power source in a testing process; wherein the to-be-tested skeleton model is provided with a skeleton main body, a tendon and a patella which is internally fixed; one end, far away from the patella, of the skeleton main body is fixedly mounted in the inner fixing cylinder, and a bone cement filling space is formed between the inner wall of the inner fixing cylinder and the end, far away from the patella, of the skeleton main body; the tendon is connected with the power output end through a connecting piece. According to the invention, the stability effect detection after patella internal fixation is realized.

An osseointegration augment for an orthopaedic implant comprises an endosteal fixation sleeve and a periosteal fixation collar. The endosteal fixation sleeve surrounds an intramedullary rod and is configured for insertion into a medullary canal, defining an external endosteal osseointegration surface. The periosteal fixation collar surrounds the intramedullary rod and bridges the endosteal fixation sleeve and a resected bone surface, defining an external periosteal osseointegration surface and a bone contacting face for physiological load distribution. The endosteal fixation sleeve and periosteal fixation collar define opposing flat contacting faces, facilitating stable, non-coaxial independent positioning. The endosteal fixation sleeve is spaced from the intramedullary rod, forming an internal gap filled with bone cement. This configuration optimises endosteal and periosteal osseointegration, improves implant stability, and enables intraoperative adjustability to accommodate anatomical variations.

The utility model discloses an acetabulum quadrilateral body nail rod composite fixing device which comprises a composite fixing assembly installed on an acetabulum quadrilateral body bone A, a main body steel plate attached to the surface of the acetabulum quadrilateral body bone A, cortical bone screws penetrating through the main body steel plate and implanted into the acetabulum quadrilateral body bone A, and a limiting elastic plate installed in the main body steel plate. The main body steel plate comprises a connecting part and a circular ring part; when a fractured acetabular quadrilateral bone A is compositely fixed, the shape of the main body steel plate is tightly attached to the surface of the acetabular quadrilateral bone A, cortical bone screws are implanted into the acetabular quadrilateral bone A to firmly fix the main body steel plate, and the main body steel plate fixes the acetabular quadrilateral bone A through the bridging steel plate and the blocking screws instead of being fixed through the screws, so that the bone can be protected; the acetabulum quadrilateral bone A can be prevented from being damaged by thread cutting, the blocking screw can block the acetabulum quadrilateral bone A and avoid displacement of the acetabulum quadrilateral bone A, and the polished rod screw blocks the blocking screw and avoid displacement and instability of the blocking screw.

The invention relates to the technical field of medical instruments, and discloses a rib intraosseous fixing support, a mounting method and a dismounting method.The rib intraosseous fixing support comprises a first connecting plate and a second connecting plate, the first connecting plate and the second connecting plate are connected through a hollow bolt, and extension sections are arranged on the upper surface of the hollow bolt towards the two sides along the surface of the second connecting plate; the extension section is larger than the through hole of the second connecting plate penetrating through the hollow bolt; a central column is connected in the hollow bolt, and the upper end of the central column is connected with a cap-shaped nut. During installation, a window is formed in the surface of a rib, the linear fixing support is rotated to be laterally placed in the rib, and the linear fixing support is adjusted to be an X-shaped fixing support through a tool after being rotated by 90 degrees and fixed through a cap-shaped nut. During dismounting, only the cap-shaped nut, the central column and the hollow bolt are dismounted. Compared with the prior art, built-in and fixation of ribs of the fixing support are achieved, in the using process, the intraosseous support can be fixed only by conducting local anesthesia on a patient to achieve small-range opening, the wound is small, the later influence is small, and dismounting is convenient.

The invention discloses a jaw internal fixation titanium plate positioning and generating method and device, a medium and a product, and relates to the technical field of medical treatment.The method comprises the steps that CT or CBCT scanning is conducted on the bone surface of a patient, and a bone surface digital model is determined; performing surface smoothing processing on the grid data to determine each grid point corresponding to the processed grid data; determining a normal vector of each triangular patch based on the adjacent triangular patches formed by each grid point, and further determining a bone surface thickness value corresponding to each grid point; mapping the bone surface thickness value corresponding to each grid point to the bone surface digital model to generate a thickness map, identifying a grid region corresponding to the maximum bone surface thickness value, and determining a corresponding target triangular patch on the bone surface digital model corresponding to the grid region; generating each titanium plate nail hole location based on the normal vector of the target triangular patch; and generating the jaw internal fixation titanium plate according to the positioning of each titanium plate nail hole by utilizing a bone surface grid patch offset method. And the matching precision of the internal fixation titanium plate for the jawbone and the jawbone of the patient is improved.

Internal bone fixation devices and methods for using the devices for repairing a weakened or fractured bone are disclosed herein. A device for use in repairing a fractured bone includes a delivery catheter having an elongated shaft with a proximal end, a distal end, and a longitudinal axis therebetween, wherein the delivery catheter has an inner void for passage of at least one reinforcing material and an inner lumen for passage of a light source; a conformable member releasably engaging the distal end of the delivery catheter, wherein the conformable member moves from a deflated state to an inflated state when the at least one reinforcing material is delivered to the conformable member; and an adapter releasably engaging the proximal end of the delivery catheter for receiving the light source and the at least one reinforcing material.

Devices and methods for separating a catheter from an internal bone fixation implant are disclosed herein. According to aspects illustrated herein, there is provided a catheter cutter device comprises: a first tubular member having a proximal end, a distal end, and a lumen extending therethrough, wherein the proximal end of the first tubular member includes a threaded shank portion and a plain shank portion, wherein the plain shank portion of the first tubular member is configured to connect the first tubular member into a chuck of a drill, and wherein the distal end of the first tubular member terminates in a cutting head comprising a cutting blade; and a second tubular member having a proximal end, a distal end, and a lumen extending therethrough, wherein the proximal end of the second tubular member includes a handle having internal threads.

An intramedullary (“IM”) nail for internal fixation of a bone is disclosed. In one embodiment, the IM nail may be a retrograde femoral nail. Alternatively, in another embodiment, the IM nail may be a tibial IM nail. In one or more embodiments, the screw holes are arranged and configured to optimize placement of one or more screws, fasteners, or the like. In addition, and / or alternatively, an IM nail may be arranged and configured to facilitate removal of a broken screw.

The utility model provides an intramedullary fixing device for assisting metacarpal bone fracture healing. The intramedullary fixing device comprises a marrow nail body, a fixing piece and a fixing screw. The marrow nail body is provided with a first end part and a second end part, and the second end part is inserted into a metacarpal bone; the fixing piece is fixedly connected with the first end part, and more than one threaded hole is formed in the fixing piece; one end of each fixing screw is fixedly installed in the corresponding threaded hole, the other end of each fixing screw is fixedly installed on the metacarpal bone, and the number of the fixing screws is matched with the number of the threaded holes. According to the intramedullary fixing device for assisting metacarpal bone fracture healing, the medullary nail body can be inserted into the metacarpal bone marrow cavity after being drilled through the metacarpal bone base, the split metacarpal bone is fixed through the fixing screws, then the metacarpal bone is fixed through the three-point supporting principle, the fixing effect is more reliable compared with a kirschner wire, and the metacarpal bone fracture healing effect is better. And the problems of tendon irritation caused by fixation of the incision bone fracture plate and increase of postoperative non-healing risk caused by large-range periosteum stripping are solved.

The present application discloses a method, device, medium, and product for positioning and generating a titanium plate for mandibular internal fixation, relating to the field of medical technology. The method performs a CT or CBCT scan on a patient's bone surface to determine a digital model of the bone surface; performs surface smoothing processing on the mesh data to determine each grid point corresponding to the processed mesh data; determines the normal vector of each triangular facet based on the adjacent triangular facets formed by each grid point, and further determines the bone surface thickness value corresponding to each grid point; maps the bone surface thickness value corresponding to each grid point to the digital model of the bone surface to generate a thickness map, identifies the mesh area corresponding to the maximum bone surface thickness value, and determines the target triangular facet corresponding to the mesh area on the digital model of the bone surface; generates the location of each titanium plate nail hole based on the normal vector of the target triangular facet; and generates a titanium plate for mandibular internal fixation based on the location of each titanium plate nail hole using a bone surface mesh facet offset method. The method improves the matching accuracy between the titanium plate for mandibular internal fixation and the patient's mandible.

The utility model relates to the technical field of orthopedic surgery, and discloses a calcaneus internal fixation screw placement guiding device which comprises a supporting frame, a guiding sleeve and a locking piece. The supporting frame is fixed to the skin surface of a patient and corresponds to the calcaneus in position. The supporting frame comprises a middle connecting block, a left positioning block, a right positioning block and an upper positioning block. The three guide sleeves are located in straight notches A formed in the left positioning block, the right positioning block and the upper positioning block respectively, the angle of the guide sleeves is adjusted in the straight notches, the guide sleeves are locked and positioned through locking pieces after angle adjustment, the angle of the guide sleeves can be adjusted, and the diameter and the position of a guide hole are designed according to the size and the path of an internal fixation screw; an operator can adjust the position of the guide arm or the guide rod according to fracture types and screw placement requirements. Through the virtual space bone nail planning path, the guiding device ensures that the screw can be accurately placed along the preset path, and the risk of operation errors is reduced.