19 results about "Bone Lengthening" patented technology

An electrically powered intramedullary nail (1) for bone lengthening or transport comprises: a tubular portion (2) extending along the main axial direction (x) of the intramedullary nail (1); a rod-shaped portion (3) sliding within the tubular portion (2) and along the longitudinal axis (x), including an abutment element (31); an electric motor (4) for driving the rod-shaped portion (3); characterized in that it further comprises: a sleeve (5) inserted into the tubular portion (2) and spaced proximally along the longitudinal axis (x), adapted to form an inner shoulder, which serves as the end of the stroke of the abutment element (31).

This invention discloses an intramedullary nail system for real-time monitoring of bone lengthening and healing status, comprising an extendable intramedullary nail body, a signal processing module, a sensing module, and a mobile APP module. The intramedullary nail body includes a hollow proximal main nail and a distal traction nail, which are coaxially sleeved with a clearance fit. The intramedullary nail body contains a power module and a transmission module for driving the distal traction nail to extend and retract axially. The sensing module includes an axial pressure sensor and a callus multimodal sensor. The axial pressure sensor is arranged on the load transmission path inside the proximal main nail to monitor axial tensile load and weight-bearing. The callus multimodal sensor is attached to the outer surface of the proximal main nail at the fracture site to acquire external normal pressure and shear force. The signal processing module is connected to the sensing module to collect and process the signals transmitted by the sensing module and transmit them wirelessly to the APP module. The APP module is used to decouple and visualize the received signals.

A motorized intramedullary nail for bone lengthening or transport, of the type including a first tubular portion extending in a prevalent axial direction of the intramedullary nail; a second rod-shaped portion telescopically sliding inside the first tubular portion and along the same axial direction; a motorized electro-mechanical element for driving the rod-shaped portion which are inserted inside the first tubular portion and comprising electrical terminals accessible through the proximal part of the nail; and an independent power supply with biocompatible features for subcutaneous and prolonged implantation, connected and adapted to providing, preferably with an electronic control, electrical power according to the surgeon's plan, to operate the motorized electro-mechanical system, the independent power supply comprising a biocompatible casing and at least one power supply battery housed in the casing.

The invention relates to the technical field of bone lengthening devices, in particular to a magnetic traction type bone lengthening device which comprises a built-in part arranged in a limb of a patient and an external part arranged outside the limb of the patient, the built-in part comprises an intraosseous nail arranged in a marrow cavity of a broken bone of the patient, and at least two magnetic bone fixing blocks are arranged on the intraosseous nail; clamping blocks are elastically connected to the interiors of the bone fixing blocks, a plurality of clamping grooves matched with the clamping blocks are formed in the intraosseous nail, the external part comprises at least two lantern rings arranged outside the limbs of the patient in a sleeving mode and matched with the bone fixing blocks, and a plurality of electromagnetic blocks matched with the bone fixing blocks are symmetrically arranged on the lantern rings; and one lantern ring can move along the direction of the intraosseous nail. Therefore, when the limb of the patient is assisted in normal growth, the operation steps during single-time adjustment are simplified, the operation time during single-time adjustment is shortened, the infection risk is reduced, the structure arranged in the limb of the patient is simplified, and the comfort of the patient is improved.

The utility model relates to intramedullary nail technical field, especially place formula bone lengthening intramedullary nail, including fixed part and moving part, the inside of fixed part is equipped with accommodating cavity, is equipped with with the in-vivo driven element of in-vitro driving element cooperation use in accommodating cavity, in-vivo driven element is connected transmission rod to one end of moving part close, transmission rod one side close moving part is equipped with at least one speed reducer assembly, speed reducer assembly includes the rotation cylinder of screw connection in the inner wall of accommodating cavity, transmission rod one end is connected drive gear and penetrates into the rotation cylinder inside, drive gear engages several driven gears with the diameter greater than drive gear, the inner tooth ring that is equipped with with driven gear cooperation on the inner wall of rotation cylinder, rotation cylinder is connected in moving part to one end rotation far from in-vivo driven element. By this, the utility model can reduce the wound area on the patient's limbs under the premise of promoting the normal growth of the patient's broken bone, and the operation is simple, convenient to use.

The utility model relates to the technical field of limb orthopedics, in particular to a limb orthopedics outer frame which comprises mounting rings which are symmetrically arranged at intervals, avoiding holes which can penetrate through limbs of a patient are formed in the mounting rings, a plurality of mounting holes used for fixing bone nails are formed in the mounting rings, and a plurality of connecting parts are arranged on the mounting rings in the circumferential direction. A plurality of connecting grooves are formed in the connecting parts, a plurality of telescopic bone extension assemblies connected to the connecting grooves are rotationally connected between the two mounting rings, a protrusion is arranged between every two adjacent connecting grooves in each connecting part, a limiting rod used for limiting the fixing position of the connecting piece is arranged in each connecting groove, and the limiting rods are elastically connected to the protrusions. Therefore, the bone lengthening component can be quickly adjusted, the adjusting efficiency is improved, the bone lengthening component is convenient to install, and the installation time is saved.

The invention belongs to the technical field of medical instruments, and particularly discloses a bone extension promoting device based on electromagnetic traction, which comprises a bone fracture end positioning assembly, the bone fracture end positioning assembly comprises a telescopic connecting unit and two fixing nails, and the two fixing nails are fixedly mounted at two ends of a bone incision part respectively; the telescopic connecting unit is connected between the two fixing nails; the magnetic traction assembly comprises a telescopic adjusting unit, at least two skeleton implanting nails and two magnetic traction units, and the at least two skeleton implanting nails are fixedly mounted at the two ends of a bone incision part respectively; the two magnetic traction units are respectively used for generating repulsive magnetic field forces to the bone implantation nails at the two ends of the bone incision part, and the telescopic adjusting unit is connected between the two magnetic traction units. By means of the structural design, the bone broken end positioning assembly and the magnetic traction assembly act synergistically, bone tissue regeneration of the bone incision part can be stimulated, and bone lengthening is effectively achieved.

An intramedullary nail (1) for bone lengthening or transport, comprising: a first tubular portion (2) extending along the main axis of the nail (1); a second rod-shaped portion (3) sliding in itself and axially within the first tubular portion (2); an electric motor device (4) for driving the rod-shaped portion (3), inserted within the first tubular portion (2) and comprising electric terminals (48, 49) accessible through a proximal portion of the nail (1); a covering element (9) for covering and protecting the electric terminals (48, 49), through which respective ends (24, 26) of electric wires (18, 19) pass; a spacer (8) for supporting the covering element (9) at a preset distance from the electric terminals.

Provided herein is an adjustable implant configured to non-invasively guide bone growth in a patient. The adjustable implant includes a first portion configured to couple to a first bone segment and a second portion at least partially disposed within the first portion and configured to couple to a second bone segment. The adjustable implant includes a drive assembly configured to be transcutaneously actuated, and to drive rotation of a gear assembly configured to rotate about a first axis, and drive axial translation of the second portion along a second axis. Non-invasive actuation of the drive assembly therefore causes the adjustable implant to distract or retract along the second axis.

The present invention discloses a wirelessly operable implant system for providing controlled lengthening of a bone. The wirelessly operable implant system (100) comprises a bone lengthening intramedullary nail (110), an extracorporeal wireless controller (130), and an implantable drive unit (120). The bone lengthening intramedullary nail (110) fixes in intramedullary cavity (16) and its extending elements (111) and (112) fix with different bone segments (14) and (15). The bone lengthening intramedullary nail (110) distracts the bone segments (14) and (15) when provided with input rotational motion to the unit (113) fitted within. This input rotational motion is given with physical connection by extramedullary implant (120) which is intracorporal and extramedullary. The extramedullary implant (120) is operated by an extracorporeal wireless controller (130).

A bone lengthening auxiliary device with a telescopic mesh support for assisting interosseous growth, on the basis of the current bone lengthening external fixation device, a mesh telescopic support made of magnesium material is fixed between the two ends of the osteotomy by the first bone external fixation needle or steel needle, and the first bone external fixation needle or steel needle for fixation is installed on the external fixation frame. The support can gradually expand with the lengthening of the two ends of the osteotomy, forming a mesh structure, providing a porous mesh support for guiding interosseous tissue regeneration between the two ends of the osteotomy, and improving the osteogenesis efficiency and strength during bone lengthening. The magnesium metal material can be degraded automatically in the later stage, and the degradation process can promote osteogenesis. The bone lengthening external fixation device is simple and convenient to operate during adjustment, with scales to ensure the adjustment accuracy; the support is prepared by 3D printing, which can be designed individually for different patients and different parts of the bone shape, and the mesh pore size can be controlled, with good adaptability and good bone lengthening effect.

The present invention relates to the technical field of bone lengthening devices, and more particularly to a magnetic traction bone lengthening device comprising an internal portion disposed within a patient's limb and an external portion disposed externally of the patient's limb. The internal portion comprises an intrabone nail inserted into the medullary cavity of the patient's broken bone, the intrabone nail being provided with at least two magnetic bone fixation blocks, each elastically connected to a retaining block within the fixation blocks, and the intrabone nail being provided with a plurality of retaining slots for engaging the retaining blocks. The external portion comprises at least two rings disposed externally of the patient's limb, each symmetrically provided with a plurality of electromagnetic blocks that interact with the fixation blocks, with one of the rings being movable in the direction of the intrabone nail. Thus, the present invention can assist in the normal growth of the patient's limb while simplifying the steps and time required for a single adjustment, reducing the risk of infection, simplifying the structure inserted into the patient's limb, and improving patient comfort.

The invention discloses a palm and metatarsal bone extension support which comprises a first support body, a second support body, a sliding rail, a connecting rod and a sliding block, the sliding rail is arranged in an arc shape and arranged at one end of the first support body, and the sliding block is arranged in the sliding rail in a sliding mode and connected with the second support body through the connecting rod. Through the application of the invention, the palm and metatarsal bone extension bracket is provided, the position of the palm and metatarsal bone extension bracket can be flexibly adjusted along with the movement of metacarpophalangeal or metatarsophalangeal joints so as to ensure that the palm and metatarsal bone extension bracket can be always matched with the rotation center of the joints, so that the joint alignment and the movement track are accurately controlled, and the joint dislocation in the extension process of the traditional palm and metatarsal bone extension bracket is avoided; and stiffness caused by cross-joint absolute braking can be prevented.

The utility model provides a high-stability bone extension bridging combined internal fixing device, and belongs to the technical field of bone extension. Comprising a first bone block and a second bone block, the plurality of fixing blocks are respectively arranged on the first bone block and the second bone block; the plurality of guide rods are arranged on the fixed block and are symmetrically arranged at the two ends of the fixed block; the fixing screw is arranged on the fixing block and is used for fixing the fixing block and a bone block; the fixing screw is provided with a screw body and a nut. By arranging the fixing screw, the fine threads at the bottom are beneficial to entering relatively loose sclerotin initially, the contact area and anchoring force with bone tissue can be increased along with the gradual thickening of the threads, and compared with a traditional single-thread screw, the fixing stability in an osteoporotic bone block can be effectively improved; and the loosening risk caused by insufficient friction force is reduced.

Provided herein is an adjustable implant configured to non-invasively guide bone growth in a patient. The adjustable implant includes a first portion configured to couple to a first bone segment and a second portion at least partially disposed within the first portion and configured to couple to a second bone segment. The adjustable implant includes a drive assembly configured to be transcutaneously actuated, and to drive rotation of a gear assembly configured to rotate about a first axis, and drive axial translation of the second portion along a second axis. Non-invasive actuation of the drive assembly therefore causes the adjustable implant to distract or retract along the second axis.

The present invention is about an intra-corporal telescopic osteo-distraction device for locking the length of the bone and for providing axial, torsional and bending stability; an extra-corporal force producing device for producing a force for extension causing a lengthening of the intra-corporal device and the bone; a method for bone lengthening and a bone lengthening arrangement utilizing the devices of the invention.

The present invention discloses a fully automatic bone lengthening and shortening device based on permanent magnet drive. It comprises: a support module including a linear guide rail and a plurality of sliding clamps arranged on the linear guide rail, the sliding clamps being used to install fixing nails; a telescopic module being installed on the sliding clamp to be fixed, comprising a power and telescopic unit, the power unit driving the telescopic end of the telescopic unit to extend and retract through the rotation of the rotor magnet, and the telescopic end of the telescopic unit being able to drive the sliding clamp to be movable to move; a driving module and the telescopic module being installed on the same sliding clamp, comprising two permanent magnets located above the rotor magnet, the driving module driving the rotor magnet to rotate through the magnetic field generated by the permanent magnet. The present invention can realize intelligent control of bone lengthening and shortening through the movable connection between the support module and the telescopic module, in cooperation with an external driving module, achieving high positioning accuracy and high traction frequency, while having the functions of real-time feedback of lengthening and shortening, and real-time adjustment of lengthening and shortening requirements.

The present invention relates to an implantable bone distraction device. The implantable bone distraction device includes an inner rod defining an internal cavity that houses a rotation actuator. The rotation actuator has an output shaft that is disposed at the end of the inner rod and connected to a lead screw that threadably engages a threaded inner surface of the outer rod. Rotating the lead screw converts the rotational motion into linear motion, resulting in telescoping motion of the outer rod relative to the inner rod. The rotational motion is converted into linear motion by components arranged in a parallel configuration, thereby minimizing the overall length of the bone distraction device while maintaining a maximum stroke length. In various embodiments, additional components, such as an electronic circuit board, an electrical or battery power source, may be housed within the internal cavity defined by the inner rod.