9 results about "Patella fracture" patented technology

Device for the osteosynthetic treatment of bone fractures, in particular patella fractures, with a plate (1) which has a plurality of star-shaped cavities (4), each extending in the radial direction of the plate (1) from an open end (5) on the radially outer edge of the plate (1) to an opposite end which is closer to the center (6) of the plate (1) than the open end, and a plurality of arms (18, 19, 20, 21), each having two legs (22, 24, 25, 26, 27) arranged at an angle to one another, wherein the arms (18, 19, 20, 21) are radially continuously movable relative to the plate (1) after the one leg (22) has been received in the cavities (4) and can be releasably held in place in their respective position on the plate (1) by means of fastening means, characterized in that the arms (18, 19, 20, 21) are each individually detachably connectable to the plate (1) and independently movable relative to the plate (1), the arms (18, 19, 20,21) and the plate (1) each have at least one through-opening (13, 14, 16), and the fastening means have a plurality of screws (15, 17, 31) by means of which each arm (18, 19, 20, 21) can be detachably connected to the plate (1) and to at least one bone fragment, or the plate (1) can be detachably connected to at least one bone fragment.

The present invention discloses an internal fixation device for patellar fractures, which includes a knee-holding ring, patellar nails, adjustment straps and an adjustment mechanism. The edge of the knee-holding ring is connected to the adjustment straps and / or fixing straps, and the ends of the adjustment straps and / or fixing straps are sleeved on the two end parts of the corresponding patellar nails. Among them, the length of the two ends or the middle part of the adjustment straps can be adjusted to tighten each fixing strap and each adjustment strap. The straps in the present invention can be adjusted both radially and rotate moderately along the knee-holding ring, so as to adapt to the selection of nail insertion at different positions. When inserting the nails, there is no need to consider the constraints of the strap length and the hole positions at the strap ends, and the best position for nail insertion can be found without the aid of positioning instruments. After the nails are inserted, only the tension adjustment of the straps needs to be operated. The operation process during the surgery is simple and efficient.

A patella reinforcing member is disclosed. The patella reinforcing member is configured as a compliant mechanism that may be pre-tensioned / stretched to fit around a fractured patella. The member may then be anchored to the patella—for example, via fasteners and / or hooks—and the pre-tensioning forces may be released as the member returns to its initial, non-tensioned position. The member may thereby deliver targeted anterior compression between fractured bone fragments.

The utility model provides a thread feeder applied to patella fracture closed reduction internal fixation. The thread feeder comprises a handle, an extension rod and a threading part, the handle is connected with one end of the extension rod; the threading part is arranged at the other end of the extension rod; the threading part comprises a flat head end and a wire feeding hole; the flat end is arranged at the tail end of the extension rod; the two wire feeding holes are formed in the flat head end at intervals; or the threading part comprises a pointed end and a threading hole; the cross section of the tip is triangular, and the threading hole penetrates in the width direction of the tip to form a triangular threading hole. The device is used for manufacturing a subcutaneous tunnel on the back face of the patella, the high-strength cable exposed out of one end of the inner fixing nail is guided to the high-strength cable exposed out of the other end of the inner fixing nail or one end of the other inner fixing nail through the tunnel, and final cable knotting tension band fixing can be conveniently completed.

The invention discloses a patella hook lock fixing system which is mainly applied to the technical field of medical instruments and comprises a screw, an upper hook body and a lower hook body, the upper hook body is J-shaped, two bent hooks A are arranged at the tail end of the upper hook body and distributed on the two sides of the linear section of the upper hook body, the two sides of the tail end of the linear section of the upper hook body extend outwards to form fixing wings, threaded holes are formed in the middles of the fixing wings, and the screw is screwed into the threaded holes; the lower hook body is J-shaped, the tail end of the lower hook body is provided with three hooks B, two of the hooks B are distributed on two sides of the linear section of the lower hook body, the tail end of the linear section of the lower hook body is provided with a threaded hole, a screw is screwed into the threaded hole, and the top of the linear section of the lower hook body is provided with a waist-shaped hole; an anti-loosening device is arranged at the joint of the bottom surface of the lower hook body and the top surface of the upper hook body. The patella hook lock fixing system is convenient to use and low in operation difficulty, the operation difficulty is remarkably reduced, the pain of a patient is relieved, the operation quality is improved, the patella fracture end is stable and good after healing, the patient can enter rehabilitation exercise as soon as possible, and the movement function of the affected limb is repaired.

The utility model relates to the technical field of medical instruments, in particular to a guiding device for assisting patella fracture kirschner wire implantation, which comprises an outer sleeve and an inner sleeve which are in sliding sleeve connection, and is characterized in that a sliding groove is formed in the outer sleeve, and one end of the inner sleeve is arranged in the sliding groove; a threaded hole is formed in the top of the outer sleeve and communicates with the sliding groove, and a screw is arranged in the threaded hole. Clamping pieces are arranged at the ends, away from the sliding grooves, of the outer sleeve and the inner sleeve correspondingly, and guide holes are formed in the clamping pieces; a guide pipe is arranged on the outer sleeve, the guide pipe is connected with the clamping pieces on the outer sleeve, and the guide pipe is communicated with the guide holes in the two clamping pieces. The kirschner wire is drilled at a time by positioning two points of the upper electrode and the lower electrode of the kirschner wire, so that the accuracy and the effect of an operation are greatly improved, the operation time and the projection time in the operation are shortened, and iatrogenic fracture caused by multiple operations is avoided.

The utility model relates to a hollow nail cable fixing device for patella fracture. The hollow nail cable fixing device comprises a hollow bone nail, a cable and an operation hook, the hollow bone nail is provided with a center channel, a nail cap and a nail body, wherein the nail cap and the nail body are integrally formed, and the center channel penetrates through the nail cap and the nail body. The cable is provided with a first connecting end and a second connecting end, and the first connecting end is connected with the nail cap; the operation hook is fixedly connected with the second connecting end and is configured to enable a cable to penetrate through the human tissue along the outer contour of the skeleton; wherein a first external thread is arranged on the peripheral surface of the nail cap, and a second external thread is arranged on the peripheral surface of the nail body. The patella implant can be implanted into the patella more smoothly.

This invention relates to a combined patellar fracture fixation device, comprising a Kirschner wire with threads at both ends, a tail cap, and a two-hole steel plate. The threaded Kirschner wire has a sharp end and a flat end, with an unthreaded middle section. The tail cap has a central channel connecting both ends of the Kirschner wire, with the thinner end embedded in the patellar bone. The two-hole steel plate has different widths at both ends; the wider end has a hole that connects to the tail cap, while the narrower end has a hole through which a tension band cable can pass. The Kirschner wire, tail cap, and steel plate are combined to form a patellar fracture fixation device, used in pairs. Connecting the cable creates a tension band for fixation. This invention offers better stability than traditional Kirschner wire tension band technology, effectively reducing the likelihood of loosening and displacement of the traditional Kirschner wire, the risk of cable slippage leading to tension band failure, and reducing the risk of irritation to surrounding tissues and skin puncture by the tail of the traditional Kirschner wire. This facilitates early postoperative functional exercises for patients, promotes patellar fracture healing, and provides a new and more effective fixation device for patellar fractures.

This invention provides a closed reduction and internal fixation surgical kit for patellar fractures and its method of use, relating to the field of orthopedic instrument technology. It solves the technical problem of lacking matching surgical instruments to perform minimally invasive closed reduction and internal fixation surgery for patellar fractures. The kit includes a percutaneous patellar reduction clamp, a coronal plane guide, internal fixation screws, and a suture feeder. This invention makes closed reduction and internal fixation surgery for patellar fractures simpler and more efficient, and allows for more convenient closed reduction and internal fixation of complex comminuted patellar fractures without sacrificing the quality of reduction and fixation.