7 results about "Internal Fixation Devices" 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.

This invention discloses an orthognathic internal fixation device, comprising: an auxiliary guide plate body having an inner surface for conforming to the jawbone surface, and its two sides for conforming to a distal bone segment and a proximal bone segment, respectively; a first fixation component, at least one of which is used to fix the distal bone segment and the proximal bone segment to the auxiliary guide plate body, respectively; and a second fixation component, at least one of which is used to fix the distal bone segment and the proximal bone segment. This invention provides basic fixation of the distal and proximal bone segments through the first fixation component and the auxiliary guide plate body, providing resistance support for the second fixation component when fixing the distal and proximal bone segments, ensuring that the gap between the two bone segments remains unchanged.

The utility model belongs to the technical field of medical apparatus and instruments, concretely relates to a minimally invasive atlas and axis internal fixation device, including base, the outside fixed connection of base has the mounting panel, the inside sliding connection of mounting panel has the bolt, the upper end contact of base has the connecting plate, the upper end fixed connection of connecting plate has the clamping plate, the inside clamping of clamping plate has the connecting rod, the lower fixed connection of connecting plate has the sliding block, the sliding block is connected with base. This minimally invasive atlas and axis internal fixation device is clamped connecting rod through a plurality of even distribution's clamping plate, can steady connecting rod from multiple directions, greatly enhanced the stability of fixed. The sliding connection of cooperation guide rod and sliding block and the adjusting effect of threaded rod, can accurate adjustment position. In operation, the doctor can more conveniently install the device to the position, ensure the fixed effect, help the patient postoperative recovery, reduce the risk because of the fixed instability brings.

A spine internal fixing device with a fusion function comprises a pedicle screw, the pedicle screw comprises a screw body, a screw tail is arranged at the upper end of the screw body, a nut is connected to the screw tail through internal threads, the screw body and the screw tail are of a honeycomb structure simulating cancellous bone, and solid external threads are arranged on the outer surface of the screw body. According to the spinal internal fixation device with the fusion function, a full-assembly simulation cancellous bone honeycomb structure of a pedicle screw rod nut and a matched connecting piece is prepared by adopting a 3D printing technology, and meanwhile, solid structures of key stress parts such as an external thread tip threaded connection surface are reserved so as to guarantee early mechanical fixation strength; after the components are assembled, a continuous bone ingrowth channel is formed, so that the transformation of internal fixation of the spine from temporary mechanical support to permanent osseous fusion is realized, and various intervertebral, intervertebral, posterior lateral and transverse process bone grafting fusion steps in a traditional spine fusion operation can be omitted.

The present application relates to the technical fields of spinal surgery internal fixation devices, and discloses a multi-axial double-end fixation screw, a supplementary screw and a universal screw, wherein the multi-axial double-end fixation screw comprises a screw seat, a first screw, a second screw and a screw plug; the screw seat is provided with an axial universal hole, the upper end of the screw seat is provided with a first recess to form a U-shaped groove at the upper end of the screw seat for accommodating a connecting rod, the screw plug is threadedly connected with the U-shaped groove, one end of the screw seat extends laterally to form a first extension, the first extension is provided with an oblique locking hole, the first screw is rotatably positioned in the universal hole, and the second screw is fixed in the locking hole. The multi-axial double-end fixation screw provided by the present application can implant the first screw and the second screw into bone tissue in different directions to form a spatially staggered triangular support structure, thereby significantly improving the pull-out resistance and fixation stability of the multi-axial double-end fixation screw rod system and effectively preventing screw loosening and dislocation.

The application discloses a Zr-based metal glass and a flexible internal fixation device with degradable assistance for a spine, and particularly relates to orthopedic implant instruments and biomedical metal materials. The device comprises a flexible internal fixation main body arranged along the longitudinal direction of the spine, fixed connection areas arranged at both ends of the main body, a flexible control area arranged in the middle part, an open accommodating space arranged in the flexible control area, an internal auxiliary device arranged in the open accommodating space, and an external auxiliary device arranged outside the flexible control area. The internal auxiliary device is locally attached to or embedded in the inner side of the main body, and the external auxiliary device is attached to, coated on, sleeved on or connected across the outer contour of the main body. The flexible internal fixation main body is made of Zr-based metal glass, and the internal auxiliary device and the external auxiliary device are both made of Mg-based metal glass. In the early stage of implantation, the internal and external auxiliary devices jointly form a synergistic reinforcing effect on the flexible control area; and in the later stage of implantation, the flexible response capability is gradually released, so that the rigidity is dynamically controlled.