143 results about "Healed fractures" patented technology

A fastening device having a bellows made of a material that changes shape when activated by a catalyst, and having a pleated structure that contracts from an extended state to a contracted state upon activation. The shape changing material may be a shape memory metal alloy, shape memory polymer or elastic memory composite. A method of using this fastener provides apposition and compression of abutment surfaces to join together two pieces of material, and is suitable for joining apposing bone surfaces together to heal fractures via the use of orthopedic hardware.

Bio-Inks and methods of using compositions comprising the bio-Inks are disclosed. 3-D tissue repair and regeneration through precise and specific formation of biodegradable tissue scaffolds in a tissue site using the bio-inks are also provided. Specific methylacrylated gelatin hydrogels (MAC) and methacrylated chitosan (MACh) preparations formulated with sucrose, a silicate-containing component (such as laponite), and/or a cross-linking agent (such as a photo-initiator or chemical initiator), as well as powdered preparations of these, are also disclosed. Kits containing these preparations are provided for point-of-care tissue repair in vivo. Superior, more complete (up to 99.85% tissue regeneration within 4 weeks applied in situ), and rapid in situ tissue repair and bone formation are also demonstrated.

A device and method for stabilizing a broken bone while it heals is disclosed. The device is preferably a metal rod that has a threaded portion. The device is positioned into a bone, such as a metacarpal bone, by forming an opening in the bone suitable for receiving the device, and inserting it into the opening wherein the threaded portion retains the device in position.

A method and apparatus are disclosed for treating bone fractures by the application of intermittent pneumatic compression. The period of compression is sufficient to induce venous stasis at the fracture site. The period of recovery can be about half the period of compression. The applied pressure can be in the range os about 25–60 mmHg.

The invention discloses a digitized design and 3D printing method for an individualized ankle fracture brace. The method comprises the following steps of (1) acquisition of limb laser three-dimensional scanning point cloud data; (2) packaging, smoothing and thickening treatment of the point cloud data; (3) brace hollowing out, button connecting and lockable characteristic design; and (4) 3D printing of the brace. The individualized ankle fracture brace has the following advantages that (1) compared with a plaster bandage, experience and technical requirements for a producer are relatively lowered; (2) suffering of a patient for repeated changing of plaster in the treatment process is relieved; (3) data are precisely extracted according to different physical characteristics and damage situations of injured limbs of patients by use of a 3D laser scanner; (4) the brace can be manufactured by adoption of materials better than plaster in transmissivity, and dynamic X-ray observation of fracture healing situations is facilitated; and (5) in the manufacturing process, a model is hollowed out, so that the brace is made lighter in weight, the air permeability is good, the comfort degree is high, and higher patient compliance is achieved compared with the massive plaster.

The invention provides a fractured end micro-movement and blood supply based fracture healing simulation system, relating to the field of biomedical engineering. The system is used for predicting a complicated process of fracture healing and exploring undetermined mechanisms in fracture healing. The system comprises a fracture healing simulation sub-system, an input module and a display module. The fracture healing simulation sub-system (1) comprises a geometry modeling module, a grid partition module, an environment initialization module, a biomechanical calculation module and a biological environment module. The biological environment module is used for creating a biochemical environment of callus in fracture healing so as to finish tissue differentiation in the callus. According to the system, blood supply is used as a dynamic variable and is introduced to the fracture healing simulation system, so that the fracture healing process can be simulated more accurately. The system can perform experiment simulation repeatedly, thereby helping to find out the best fractured end micro-movement value and the impact of blood on fracture healing.

A fastening device having a bellows-like or accordion-like structure made of a material that changes shape when activated by a catalyst, and having pleated or foldable zigzag elements that contract from an extended state to a contracted state upon activation. These elements are formed from zig and zag segments of various shapes. The shape changing material may be a shape memory metal alloy, shape memory polymer or elastic memory composite. A method of using this fastener provides apposition and compression of abutment surfaces to join together two pieces of material, and is suitable for joining apposing bone surfaces together to heal fractures via the use of orthopedic hardware.

The invention belongs to the field of medical apparatus and instruments, and relates to a femoral shaft fracture internally fixing instrument, which comprises a lockable steel plate and an aiming assembly of the lockable steel plate, wherein the lockable steel plate comprises a steel plate, a single lock, a linkage lock and a lock nail; the aiming assembly comprises a single lock aiming fixator and a linkage lock aiming fixator; an auxiliary assembly bone nail, a bone nail hole positioning hook and a combined screwdriver. In the femoral shaft fracture internally fixing instrument, an arc which corresponds to the forward physiological curve of a femoral shaft is designed on the steel plate longitudinally; an arc which corresponds to the transverse diameter of the femoral shaft is designed transversely near a bone surface, so that the arc is put in the middle of the fracture position along an arc line of the femoral shaft to contact bones in a limited mode; and the lateral surface is circular arc curved surfaces which are distributed symmetrically and uniformly. The linkage lock strides over a fracture line on the inner side of the femoral shaft, and the single lock is away from the fracture line; and the aiming assembly is used for aiming, fixing, drilling and assembling, and is easy to operate. The femoral shaft has the advantages that the fixation is stable, postoperative additional fixation is avoided, functional exercise can be performed in early stage, and the union of fracture is facilitated, and internal fixtures are convenient to dismantle after union.

The invention discloses an internal fixation therapeutic method of tibial fracture, which comprises the following steps: step one, scanning limb skeletons at a healthy side and a fractural side by a spiral CT (Computed Tomography) respectively; step two, reconstructing and outputting a three-dimensional image of the healthy side limb skeletons and a three-dimensional image of the fractural end skeletons by using MIMICS software; step three, respectively measuring and combining the three-dimensional images of the skeletons at the two sides so as to draw a steel plate drawing required for operation; step four, leading the drawing into PRO/E software of a numerical control centre, and customizing completely individualized internal fixation steel plates, bolt holes and positioning templates after serial technological processes; and step five, implanting the individualized internal fixation steel plates and bolt holes into the fractural skeletons through a minimally invasive surgery by using the positioning templates produced in the step four, thereby finishing the internal fixation operation. The internal fixation therapeutic method has the advantageous effects of capably shortening operative time, capably minimizing periosteal injury around the fractural end, having small operative incision in appearance and enabling fractural patients to heal quickly.

This device is intended for orthopedic applications, particularly to treat a pars interarticularis fracture. The device is highly specialized to treat a common pars fracture with a uniquely contoured device that stabilizes the inferior fractured element with a generally conforming and non-linear hooked surface then transcribing the pars fracture to rigidly attach to the cortical bone between the facet and pedicle bones while applying compression across the fraction for fracture healing and stabilization.

A composition for accelerating fracture healing, which comprises a PDE4 inhibitor as an active ingredient, specifically a composition comprising a PDE4 inhibitor and a biocompatible and biodegradable polymer is provided, which composition, when formulated into a form suitable for local administration such as microsphere preparation, can provide a pharmaceutical composition showing an excellent effect in the early healing of bone fracture. The said composition is useful in the healing of refractory fracture of elderly people and diabetic or osteoporosis patients.

The invention discloses an internal fixed parameter optimization treatment individualized modeling method based on a fracture healing process. The method comprises the following steps that a fracturesite is scanned, modeling is performed on a fractured bone; an orthogonal experimental design method is adopted to combine and assemble different internal fixed parameters in a three-dimensional software, the finite element mesh generation is performed on a fractured bone model, a mechanical property value is assigned according to a gray value on the fractured bone of an internal fixation system;the assembly of different screws is carried out, and whole finite element mesh generation is carried out; a mechanical environment simulating the fractured bone is loaded and calculated, a stress on the internal fixation system and a healing result of the fracture are obtained, and then the fracture healing result is evaluated; the screw layout is updated, and the above steps are repeated to perform combined optimization on the screw layout The internal fixed parameter optimization treatment individualized modeling method based on the fracture healing process has the advantages that the errorcaused by manually dividing the cancellous bone and the bone cortex is avoided, and a basis is provided for the combined optimization selection of the internal fixed parameters of a bone fracture plate during the fracture treatment.

The invention discloses a simulation system for simulating a fracture healing process, which relates to the field of biochemical engineering. The simulation system is used for predicting the complex process of fracture healing and providing guidance for doctors in establishing a good surgical program for fracture healing. The system comprises a three-dimensional geometric modeling module, a finite element creation module, a fracture site biomechanical-modeling module, a fracture site cell evolution modeling module, a callus growth modeling module and a display module. Cell concentration and tissue material properties are updated by the fracture site biomechanical-modeling module and the fracture site cell evolution modeling module; the geometric shape of callus is updated by the callus growth modeling module; and the effect of fracture healing is judged by the display module. The simulation system can more accurately simulate the process of fracture healing and repetitively carry out experimental simulation for unlimited times, thus providing help for making the best surgical program for fracture healing.

The invention discloses a flexible intramedullary nail, which pertains to the technical field of orthopedic medical devices and aims at providing a flexible intramedullary nail which can spare secondary operation, eliminate stress shielding, promote fracture healing and has the advantages of simple structure, practicality and low cost. The technical proposal of the invention is that a nail pole of the intramedullary nail consists of a proximal-end nail body, a distal-end nail body and a spring body, wherein, the proximal-end nail body and the distal-end nail body are positioned at both ends of the nail pole respectively and a proximal-end fixed screw hole and a distal-end fixed screw hole are arranged on the two ends; the spring body is arranged in the middle of the nail pole and both ends of the spring body are tightly connected with the proximal-end nail body and the distal-end nail body respectively; the length and quantity of the spring body can be adjusted according to the characteristics of a long bone and the diameter of the spring body can be 2mm to 6mm and can be adjusted according to the requirements of fracture fixing. The flexible intramedullary nail has simple structure and innovative design, resolves the problems of eliminating stress shielding, promoting fracture healing, avoiding secondary operation, and the like after the intrameduallary nail is put in the body, and also has the advantages of simple structure, practicality and low cost.

An expandable intra-medullary nail comprises a nail body and a central rod arranged inside the nail body. The nail body is a hollow tube. The tube walls of the trunk and the far end of the nail body are provided with three or more than three expandable slots lengthways. The far end of the central rod is provided with an expandable head. The near end of the central rod is provided with a screw thread type axial tow attachment. The near end of the nail body is provided with a fixed structure which is a lock nail hole which is arranged at the near end of the nail body and is equipped with a lock nail. The present invention is characterized in that the lock nail is formed by a stainless steel nail body and degradable biological active material wrapped at the outside of the nail body, or the lock nail is made from the degradable biological active material, or the hole wall of the lock nail hole is provided with a layer of degradable biological active material. Compared with the prior art, as the stress simulation can be provided for the middle and later period of the fracture healing and the provided stress simulation is strengthened gradually, the nail of the present invention has the advantages of being good for the porosis at the early period of the fracture, being good for promoting the rebuilding and the cicatrization of bone during the medium and later periods of the fracture and improving the fracture cicatrization effect further.

An acetabulum posterior wall angle locking anatomic bone plate pertains to the technical field of surgical medical devices. The invention provides the acetabulum posterior wall angle locking anatomic bone plate which has small surgical incision, safe and reliable fixation and is conductive to the healing of fracture. The invention includes a plate body which is provided with screw holes, the screw holes are two rows of oblique holes, which are respectively arranged along one side of the plate body which is opposite to the edge of the acetabulum and the opposite side, the oblique included angle Alpha of the central line of the screw holes which are arranged at the one side of the plate body which is opposite to the edge of the acetabulum and the plate surface is 30 degrees to 45 degrees, and the oblique included angle Beta of the central line of the screw holes at the opposite side and the plate surface is 30 degrees to 60 degrees. The invention can make use of the self-shape to ensure the fixation of fracture to be most close to the normal structure after the reduction and fixation of the fracture. The invention has the integrity and the stability which are not possessed by the combined usage of a plurality of bone plates. The invention can reduce surgical incision, reduce the dissection of soft tissues, have less oppression on the periosteum and be more conductive to the healing of fracture. The placement and the removal are easy, and the cost is low. When a screw is screwed, the rod part of the screw can accurately avoid the acetabulum.

The invention discloses a single-shoulder adjustable external fixator for treating clavicle fracture, a part from an upper arm of an injured shoulder to the shoulder is sleeved by a sheath from the upper arm to the shoulder, the sheath and a body trunk are fastened tightly by a binding strap in a rotating way, backward and outward resultant forces are formed at the front of the injured shoulder so that the position of a locking part of the injured shoulder is fixed without change, therefore, the clavicle fracture is prevented from shifting, and the aim of fracture healing is achieved. As the single-shoulder adjustable external fixator adopts single-shoulder fixation, the nerve blood vessel compression of oxter is reduced, the patient pain is relieved, limbs of other health sides are liberated, the convenience is brought for patients in daily life, and the patients are easy to receive the treatment; and meanwhile, the patients can adjust and control the tightness degree of the single-shoulder gasbag external fixator by selves, therefore, the self-nursing motivation of the patients is improved. The external fixator is simple and easy to produce, simple in operation process and easy to popularize and develop.

The invention discloses a static and dynamic exchange-type thighbone interlocking intramedullary nail, which comprises a nail main body. A static hole and a first sliding locking hole are arranged on the coronal surface of the far end of the nail main body. A second sliding locking hole is arranged on the sagittal surface of the far end of the nail main body. The first sliding locking hole and the second sliding locking hole are long holes. The static hole is arranged at the far end of the first sliding locking hole and the second sliding locking hole and is arranged at the end part of the far end of the nail main body. Due to the static and dynamic exchange-type thighbone interlocking intramedullary nail, according to the actual situation of fracture healing, early-stage static fixation can be realized, a far-end static locking nail can be taken out to implement dynamic fixation if a fracture is not well healed, static fixation is realized after the first sliding locking hole is in place, a sliding locking nail in place is taken out if the fracture is not healed ideally, dynamic fixation is implemented through a second sliding locking nail, then static fixation is achieved, controllable adjustment of repetitive dynamic and static exchange fixation can be realized and the fracture healing is better promoted.

A bone fastener or an orthopedic implant that resides within the bone after orthopedic surgery has a threaded and/or unthreaded shaft, said shaft has a hollow portion and a solid portion. The hollow portion may have a structure that enhances tissue growth and may also hold materials that enhance tissue growth. The hollow portion may also hold materials to treat diseases and/or promote bone fracture healing.