306 results about "Bone screws" patented technology

The invention relates to the technical field of orthopedic biomedical treatment, in particular to a proximal humerus fracture intramedullary bone cement supporting rod. The bone fracture plate comprises a bone fracture plate body, a plurality of first connecting holes and a plurality of second connecting holes are formed in one side of the bone fracture plate body in a penetrating mode, and solid bone nails are arranged in the first connecting holes. According to the device, bone cement is injected into a marrow cavity from an injection molding channel and an injection molding opening and then solidified into a rod body, the marrow cavity space is tightly filled, supporting structures are synchronously formed on the inner side and the outer side of the humerus through cooperation of a bone fracture plate and a bone cement supporting rod in the marrow cavity space, and therefore stress generated when arms of a patient move is evenly dispersed on the two sides of the humerus; the fixing stability is remarkably improved, the risk of internal fixation failure such as steel plate displacement and screw cutting is effectively reduced, and the bone cement supporting rods can further prevent displacement of fracture blocks, promote fracture repair, relieve extrusion and friction of surrounding tissue of a filling position, reduce inflammatory response and postoperative pain and improve the rehabilitation comfort of a patient.

A dual interface screw element includes a screw body (10) with an external thread (12) and two distinct engagement interfaces (13, 15), one for inserting the screw and another for removing it. The removal engagement interface (15) includes a reverse thread (16) located in an axial recess (36) such that a complementary reverse-threaded tool (24) applying torque to extract the screw body is tightened against the second engagement interface. The screw is part of a system including an extraction tool (24) and an insertion tool (18). Applications include medical applications such as dental implants and bone screws, domestic applications such as headless wall mounting anchors, and a wide range of other industrial and aerospace applications.

A bone fixation system for reconstruction and / or trauma treatment of bones, the bone fixation plate comprising: a bone fixation plate configured and dimensioned for application to a patient's bone, the bone fixation plate comprising an in-use upper surface and an in-use lower surface with at least one opening formed on the upper and lower surfaces to form a passage extending from the upper surface to the lower surface; each passage being defined by inner walls extending from the upper surface to the lower surface, the inner walls having a height extending between the upper surface and the lower surface, the inner wall further comprising: a threaded inner wall portion extending from the upper surface towards the lower surface, the threaded inner wall portion having threads with a thread pitch (PW); and a non-threaded lower inner wall portion extending from a lower part of the threaded inner wall portion towards the lower surface of the bone fixation plate; and at least one bone screw with a threaded screw head having threads with a thread pitch (PH) for engaging and interfacing with the threaded inner wall for variable angle anchoring of the threaded screw head during use.

A pivotal bone screw assembly includes a threaded shank body having an integral upper portion receivable in a receiver, with the receiver having an upper channel for receiving a longitudinal connecting member and a lower cavity cooperating with a lower opening. The assembly also includes a downloadable compression insert with a side arm extension for engagement and compression by a vertically-translating insert side compressing member so as to lock the assembly independent of the closure top.

Implantable devices and assemblies that provide a friction fit between a receiver and a fastener, such as a bone screw. A frictional force is applied between the screw head and both a retention ring and a pressure insert, maintaining and stabilizing the orientation of the receiver relative to the screw head before being fixed by a set screw. This mechanism prevents drooping or slipping of the receiver out of alignment when implanted. Additionally, the devices allow for modular assembly before or during spinal fixation, enabling bottom-side loading of the screw head into the receiver. Various screws with different characteristics can be coupled to the receiver body before or after implantation. The frictional force may be facilitated by one or more ridges on the receiver body that engage the pressure insert, which is resiliently urged against the screw head, providing a spring-like compression force.

The invention discloses a robot calibration method for spine endoscopic surgery, which comprises the following steps: S1, optical marking points are pasted on the skin or bony structure of a patient, the skin marking is used for fixing a reflective ball by using a medical adhesive tape, the bony marking is percutaneously implanted into a spinous process or crista iliaca through a titanium alloy bone nail, and at least six marking points are needed. According to the method, minimally invasive property and stability are both considered through a double marking strategy, six points cover three vertebral bodies to ensure the integrity of an anatomical range, registration errors caused by breathing / body position changes are reduced, meanwhile, non-rigid registration is combined with a B spline grid (10 mm) to consider calculation efficiency and spine physiological curvature adaptability, high-precision surface reconstruction is achieved through a Marching Cubes algorithm, and the method has the advantages of being high in precision and high in precision. An error suppression mechanism is formed by + / -0.25 mm precision and redundancy measurement (five times of sampling) of the optical tracking system, registration robustness is improved through SVD and ICP double-algorithm complementation, multi-constraint path planning is achieved through an A * algorithm and Monte Carlo simulation, and a 4 mm safety corridor provides a buffer space for instrument errors.

The invention relates to a device (1) for treating a fracture, in particular a fracture of a proximal femur such as, for example, a femoral neck fracture, having a plate (3) for attaching to a thigh bone, one or more intraosseous screws (10) by means of which the plate (3), through intraosseous screw openings (14), can be fixed to a thigh shaft (4), a coupling device, in particular a bone screw (5), which is arranged proximally to the at least one intraosseous screw (10) and by means of which the plate (3) can be connected at a coupling device opening (6) through the thigh shaft (4) and a thigh neck (2) to a thigh head (7), wherein the coupling device is connected to the plate (3) with play (21) such that the coupling device can be moved in the lateral direction (8) relative to the plate (3). In order to achieve a particularly precise and simultaneous adjustability of the play (21), according to the invention an adjusting device is provided which is connected to the plate (3), which can be positioned at different positions relative to the plate (3) and by means of which the play (21) can be adjusted.

The invention provides a nail taking device and a nail taking method for the orthopedics department, and relates to the technical field of equipment for orthopedic surgery. The orthopedic nail taking device comprises a base, an operating bed, a second box body, a first box body, two adjusting plates and a nail taking head, the operating bed is fixedly installed at the top of the base, the two adjusting plates are fixedly installed on the two sides of the operating bed respectively, the nail taking head is arranged at the top of the operating bed, and the first box body and the second box body are fixedly installed at the top of the base. The two adjusting plates are rotatably provided with the same operation frame, the top of the operation frame is slidably provided with a cylinder body, the top of the cylinder body is rotatably provided with a limiting cylinder, and the top of the limiting cylinder is provided with a second lead screw in a penetrating manner. The nail taking device for the orthopedics department has the advantages of being convenient to use, capable of preventing a bone nail from loosening and falling off, capable of preventing the bone nail from falling into surrounding tissue due to accidental loosening in the screwing-out process, capable of cleaning the bone nail in time, and capable of preventing impurity drying and cleaning difficulty increase caused by waiting for cleaning.

The invention relates to a bone screw image recognition system and method.The system comprises a TOF camera, a robot, a detection platform, a camera, a light source and a processor, and the method comprises the steps that coordinate information of a screw box is scanned and recognized through the TOF camera, the arrangement mode of bone screws in the screw box is calculated, and row and column data are obtained; according to the row and column data, the processor correspondingly controls the robot to move the bone screws out of the screw box and place the bone screws on the detection platform; the processor correspondingly controls and adjusts the working states of the lamp source, the camera and the robot to obtain a bone screw image; identifying bone screws from the bone screw image, cutting out an independent image of each bone screw, and marking to obtain a marked image; and cutting the labeled image into a rectangle by the processor, and identifying English letters, characters and numbers in the rectangular area again to obtain a bone screw identification result. Compared with the prior art, the bone screw image can be automatically, efficiently and accurately shot, and the recognition result can be obtained.

An implant includes an interbody device having a front, a rear, a first lateral side, a second lateral side, a central cavity, and a plurality of bores extending into the rear of the interbody device, each arced bore being configured to receive an arced anchoring member.

Bone screw drivers are disclosed that apply torque to a threaded shank of a bone screw assembly and receive a cement delivery device to introduce bone cement through the threaded shank. Also disclosed are driver adapters that couple to a driver in order to facilitate application of torque thereto. The driver adapter can decouple from the driver after implanting a bone screw shank to allow the subsequent use of a cement delivery device in combination with the driver. The devices can be reusable and can employ a number of additional components, including retaining and counter-torque sleeves, driving handles, etc. Further, the devices can allow setup of a bone screw inserter assembly outside a surgical field, such that a completed assembly can be passed to a surgeon or other user for immediate use.

The invention provides a multi-column integrated biological fixation partial femoral head replacement device, and relates to the field of medical instruments. The device comprises a bone nail, an auxiliary fixing piece and a joint prosthesis, the bone nail is provided with a first end part and a second end part nailed into a femoral neck medullary cavity, and the first end part, the auxiliary fixing piece and the joint prosthesis are integrally formed; the auxiliary fixture has a first surface and a second surface in contact with the conical osteotomy femoral head to prevent sinking and lateral rotation. The joint prosthesis only replaces the cut part of the necrotic femoral head, more normal sclerotin can be reserved, trauma is small, femoral head supporting and bearing are not affected or changed, long-term stability of the joint prosthesis is guaranteed, and meanwhile future rebuilding is facilitated. In addition, the first end part, the auxiliary fixing piece and the joint prosthesis are integrally formed, so that joint prosthesis failure caused by looseness or corrosion among the first end part, the auxiliary fixing piece and the joint prosthesis can be avoided.

The utility model relates to the technical field of medical instruments, and discloses a high-stability durable tibial prosthesis which comprises a locking mechanism, the locking mechanism is of a double-layer structure, an anti-rotation mechanism is rotatably arranged on the lower end face of the locking mechanism, a telescopic mechanism is movably arranged on the lower end face of the anti-rotation mechanism, and an implanting mechanism is fixedly arranged on the lower end face of the telescopic mechanism. The locking mechanism comprises a locking hole, a side wing steel plate, a tibial plateau, a bone trabecula porous structure, a locking bone screw, a first suture hole and a second suture hole, the anti-rotation mechanism comprises an anti-rotation block, an anti-rotation groove, a first cylindrical pin and an anti-rotation rod, and the telescopic mechanism comprises a telescopic handle, a second through hole, a second cylindrical pin, an adjusting button and an adjusting shaft. The implanting mechanism comprises an intramedullary nail and a bone cement groove. According to the bone trabecula prosthesis, the retraction mechanism is arranged and can be adjusted according to the requirements of different patients, and the bone trabecula porous structure and the anti-rotation mechanism are arranged, so that the prosthesis can be kept stable.

A spinal fixation system for use in securing a spinal rod to a vertebra using a lockable bone screw connector. The connector is configured to be movably connected to the head of a bone screw, and a spinal rod can then be used to physically connect a first vertebra to a second vertebra. The spinal fixation system includes a tool grasping the connector by a locking and / or unlocking instrument that can allow the connector to lock to the bone, screw by moving a collet, while the connector can still move along the spinal rod until locked into place by a set screw. The connector can be selectively unlocked from the bone screw for adjustment or removal.

Apparatus and methods are described for use in securing a first bone relative to a second bone using a pair of surgical staples or, alternatively, a surgical staple and a bone screw. When a pair of staples are used, one of the legs of one of the staples may pass between the legs of the another of the staples. When a staple and a bone screw are used, the bone screw may pass between the legs of the staple. A guide tool can be used during the drilling of the holes for the legs of the staples or the legs of the staple and a bone screw. The guide tool provides guides for drilling guide holes for the staples or for the screw and staple.

A modular poly-axial bone screw includes a poly-axial bone screw, a poly-axial tulip head, and a collet disposed within the tulip head, the collet interacting with the bone screw and tulip head providing an interference fit with the bone screw head to lock orientation of the tulip head on and relative to the bone screw. Inner configurations of the tulip head interact with outer configurations of the collet to lock axial and / or rotational position of the collet within and relative to the tulip head, and thus about the bone screw head. The collet also has a base configured to conform to a top of a bone screw, wherein the collet is configured to support the bone screw and the tulip head when a spine rod is fixed in the tulip head.

Implantable devices and assemblies that provide a friction fit between a receiver and a fastener, such as a bone screw. A frictional force is applied between the screw head and both a retention ring and a pressure insert, maintaining and stabilizing the orientation of the receiver relative to the screw head before being fixed by a set screw. This mechanism prevents drooping or slipping of the receiver out of alignment when implanted. Additionally, the devices allow for modular assembly before or during spinal fixation, enabling bottom-side loading of the screw head into the receiver. Various screws with different characteristics can be coupled to the receiver body before or after implantation. The frictional force may be facilitated by one or more ridges on the receiver body that engage the pressure insert, which is resiliently urged against the screw head, providing a spring-like compression force.

Provided herein are medical devices, assemblies, and methods for circulating materials within a medical device. The adapter includes a shaft, a cannula, a female orifice lock, a male conical surface, and threads, all designed for reversible engagement and material circulation. The assembly incorporates the adapter and is designed for use with a variety of medical devices, including bone screws. The method includes engaging a medical device having a pressurizing device and a scaffold with the adapter and circulating material in the medical device via negative or positive pressure. These innovations provide a versatile approach to circulating materials within a medical device, which can be beneficial in a variety of medical procedures and therapies and can increase the efficiency and effectiveness of material circulation.

The invention relates to a system comprising an anterior cervical plate (10) with receiving openings (12) for bone screws and a locking mechanism for inserted bone screws that are screwed to a vertebral body and press the cervical plate against the vertebral body. The locking mechanism has a plate-like locking body which is moveably held on the cervical plate and can be moved from a position in which it leaves a receiving opening as freely accessible as possible into a locking position in which the screw head lying in the receiving opening is covered by the locking body and thus the migration of the screw out of the cervical plate is prevented. In order to provide maximum flexibility in the design of the cervical plate while maintaining a high degree of security against loosening of the bone screws and being easy to operate, the locking body is formed by a thin disc (16) which is fixed to the anterior cervical plate so as to be rotatable about an axis of rotation substantially perpendicular to the cervical plate (10) and which has, angularly distributed over the circumference, at least one locking arm (18-1, 18-2) and a support portion (20) lying in the disc plane, which snaps into a catch position via a rotation of the disc (16) about a predetermined angle of rotation (WD), and can be removed again via a counter-rotation of the disc (16).

The invention relates to the technical field of medical materials, and discloses a preparation method of a multifunctional fiber patch for bone nail fixation postoperative care. The fiber patch adopts a three-layer composite structure design, and comprises an anti-allergic silica gel substrate layer, a drug-loaded nanofiber functional layer and a waterproof breathable layer. The preparation method comprises the following steps: (1) preparing the anti-allergic silica gel substrate layer from platinum cured silica gel and a pressure-sensitive adhesive; (2) preparing a medicine-carrying nanofiber functional layer containing phellinus igniarius polysaccharide through electrostatic spinning; (3) mixing waterborne polyurethane with polytetrafluoroethylene to prepare a waterproof breathable layer; and (4) sequentially compounding the substrate layer, the functional layer and the waterproof breathable layer into the multifunctional fiber patch. The fiber patch has the comprehensive effects of resisting bacteria, resisting inflammation, resisting allergy and easing pain, meanwhile has excellent air permeability and comfort, can effectively promote postoperative wound recovery and reduce infection risks, is particularly suitable for wound nursing after orthopedic internal fixation, and has remarkable clinical application value.

A retractor blade assembly having a retractor blade having a track extending long on a face of the retractor blade, a screw entry at a bottom of the retractor blade comprising a window through which a bone screw is insertable, and a screw gate which engages the track on the retractor blade. Once the bone screw is placed through the screw entry, the screw gate lowers until the screw gate blocks the window.

A spinal fusion system comprising an interbody device includes a leading end, trailing end, and opposed bone contacting sides extending therebetween. The trailing end defines a threaded opening that extends toward the leading end. The system also includes a bone plate that includes inner and outer surfaces and defines a first bone screw opening and connection screw opening extending therethrough. The system further includes a connection screw that includes a head and a threaded shaft. The head is positioned within the connection screw opening of the bone plate and is rotatably connected thereto such that the connection screw is rotatable about a longitudinal axis thereof but is prohibited from translational movement relative to the bone plate. The threaded shaft extends from the connection screw opening and is configured for threaded engagement with the threaded opening of interbody device.

A method for controlled delivery of fluids to the exterior of bone and surrounding tissue of a patient includes providing a cannulated bone rod. The method further includes creating an aperture in the skin of a patient and fixating the rod along bones or bone fragments using a spinal fixation system through the aperture. A spinal fixation system includes a bone screw having a longitudinal access and a bone rod configured to connect the bone screw to at least one additional bone screw. The bone rod is lateral to the longitudinal axis. The method further includes the steps of providing a fluid source, coupling the fluid source to the bone rod, and delivering a fluid from the fluid source into the bone rod. An additional method includes using the fixation system as a point of drainage for the posterolateral fusion site.

The present disclosure relates to an external fixator for orthopedic use, in particular for the treatment of calcaneus fractures, comprising: a rigid support for a first clamp for fixing bone screws; a second support for a second clamp that is hinged at an end of the rigid support; a third support for a third clamp that is hinged at an end of the rigid support; the rigid support being configured as a guide with the first clamp slidingly mounted thereon. The fixator according to the invention is made of radiolucent material with joint elements comprising partially radiolucent or radiopaque materials and configured to allow orienting the bone screws held by the clamps in directions that are tilted to each other.

A bone plate incorporating a length adjusting elongate hole formed in a shaft portion thereof, along with corresponding methods of use. In one embodiment, the length adjusting elongate hole is configured to receive one or more bone fixation devices (e.g., bone screws). In use, the bone fixation device positioned within the length adjusting elongate hole may be partially loosened, without removal, to enable the patient's bone to be adjusted (e.g., loosening the bone fixation device within the length adjusting elongate hole allows the surgeon to adjust the position of the patient's bone, and hence the bone fixation device coupled thereto, relative to the bone plate). Once properly adjusted, the bone fixation device positioned within the length adjusting elongate hole may be retightened. In various embodiments, the length adjusting elongate hole is configured so that, in use, each of the plurality of bone fixation openings remains available to a surgeon.

This utility model discloses a bone screw implantation device, belonging to the field of medical device technology. It includes: a base, two supporting sliders slidably mounted on the base, side pressure plates fixedly mounted on the sides of the two supporting sliders that are close to each other, soft pads fixedly mounted on the sides of the two side pressure plates that are close to each other, side sliding strips fixedly mounted on both sides of the base, connecting plates slidably mounted on the top of the side sliding strips, electric push rods fixedly mounted on the top of the connecting plates, a common fixing plate fixedly mounted on the output ends of the two electric push rods, and a fixing block fixedly mounted on the bottom end of the fixing plate. This bone screw implantation device, through the cooperation of electric push rods, motors, spiral rods, bevel gears, and other mechanisms, achieves precise control and stable operation of the bone screw implantation process. Simultaneously, the design of the upper pressing component and side pressure plates ensures stability and safety during implantation, and the cooperation of multiple structures greatly simplifies the operation process and saves working time.

An apparatus for fastening around a cranial burr hole includes a substantially flat core and a shell encapsulating a ring portion of the core. The shell defines an orifice substantially centered within the ring portion, and has a contoured lower surface to match the cranial curvature. Pliable arms of the core extend laterally from the ring portion, each being terminated by a fastener member. A central portion of a placement tool for the apparatus has a lower part configured to extend through the apparatus orifice, and an upper part from which first and second arms of the tool extend laterally. Each tool arm is terminated with a receptacle to hold a bone screw, and, when the tool central portion lower part extends through the apparatus orifice, each receptacle aligns with a corresponding fastener member, and lower openings of the receptacles are generally oriented along the contoured lower surface.

This invention belongs to the field of medical devices, specifically a combined internal fixator and fixation method for fixing joints with micro-motion. The combined internal fixator includes a first bone screw and a second bone screw. A movable connecting structure is provided between the connecting ends of the first and second bone screws. The movable connecting structure includes a groove and a shaft. The groove includes an insertion port and a mounting groove communicating with the insertion port. The mounting groove has a semi-circular cross-section. The shaft includes a semi-circular shaft adapted to the mounting groove, which is rotatably accommodated within the mounting groove, allowing the first and second bone screws to rotate relative to each other around a first radial axis. This invention, through a hook-groove sliding self-locking structure, achieves controllable micro-motion and integrated implantation for fixing joints with micro-motion. It has achieved significant technological advancements in preserving joint physiological function, simplifying surgical procedures, avoiding secondary surgeries, and reducing the incidence of complications. It has important clinical application value and is suitable for fixing joints with micro-motion.

A bone rivet is provided that may be used as an alternative to a bone screw for bone fixation. The bone rivet includes a head and a threaded shaft that can be expanded upon installing the bone rivet into bone. A channel extends through the bone rivet and is shaped corresponding to a bulb of a mandrel used for installing the bone rivet. A first section of the channel has a smaller width than the mandrel's bulb to enable the bulb to expand the threaded shaft and a second section is sized to have a greater width. The installation process eliminates the task of rotating a typical bone screw during its installation. The threaded shaft also includes a cutting flute, which cuts a thread path for the threaded shaft into the bone thereby reducing the amount of torque needed to rotate and remove the bone rivet from bone.