224 results about "Bone screws" patented technology

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.

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 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 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.

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.

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.

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).

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 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.

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 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.

A bottom loading fastening system that consists of the polyaxial ball and socket joint used in conjunction with an anchoring bone screw. The system allows attachment of a connector assembly having an offset angular shape for anchoring a connecting rod. The spherical ball connector using a locking ring positioned in a locking ring slot. Upon installation, the locking ring is moved to a ring containment slot to expand a retainer ring, allowing passage of a bone screw spherical ball, the retainer ring forcing the locking ring back to the locking ring slot, thereby permanently attaching the connector assembly to the anchoring bone screw. The offset between the upper and lower sections allows the rod to be received at an angle optimized for spinal alignment, thereby reducing the need for rod contouring and minimizing stress concentration on the spherical joint.

An implant (1), in particular a bone screw, for use in the animal or human body is provided. The implant (1) comprises a head (2) with a first side (3) and a second side (4), and a shaft (5) extending along a longitudinal axis (A), wherein the head (2) has at least one fluid path (6) configured to bring the first side (3) into fluid communication with the second side (4). Furthermore, a transport system (10) for the implant (1) and a method for manufacturing the implant (1) are provided.

A sensor device (1) formatted as a screw, nail or pin. The device comprises a head (10), a shaft (14). A battery cell (50) and a wireless transmitter (46) are accommodated in the head (10) or shaft (14). An antenna (15) for wireless communication is formed integrally in the head (10). A conductor (16) is provided for wired data communication and electrical power transmission between the wireless transmitter (46) and the antenna (15). A sensor housing (40) is arranged in the shaft (14) and accommodates a strain gauge (45). The shaft (14) has an end portion with a contact surface (29) through which external force is transmissible onto the sensor housing (40), which is constructed so that it deforms responsive to the external force. The external force is thus transmitted onto the strain gauge (45).

A bone screw extraction device includes a shaft extending longitudinally from a proximal end to a distal tip, a distal portion of the shaft including a tissue-receiving cavity extending proximally thereinto from the distal tip, the distal tip including a plurality of fingers configured to be received within a driving recess of a bone screw and a plurality of channels extending longitudinally along an exterior surface of the distal portion, each of the plurality of channels extending between adjacent ones of the plurality of fingers.

A vertebral implant system is provided comprising an upper staple, a lower staple and a vertical member. In some embodiments, the vertical member is a plate. In some embodiments, the plate further comprises an offset guide that defines an offset dimension to contribute to a correction of an alignment of a vertebral body. In some embodiments, the staple defines an offset dimension to contribute to a correction of an alignment of a vertebral body. In some embodiments, the vertebral implant system is configured to be installed from an anterior, oblique, or lateral angle to the vertebral body. In some embodiments, a self adjusting screw plate alignment system is provided comprising a bone screw having threaded and tip portions, a plate with a through hole, a locking element and a securing element configured to frictionally anchor the tip portion of the bone screw in the plate through hole.

A method of inserting a fastener includes positioning a portion of a stylet within a cannulated shaft of the fastener, advancing a tip of the stylet through a first bone and into a second bone, advancing a leading end of the fastener along the stylet through the first bone and into the second bone, and removing the stylet from the cannulated shaft of the fastener and the bone. In another embodiment, a method of inserting a fastener includes positioning a portion of a stylet within a cannulated shaft of the fastener, advancing a tip of the stylet into a bone to a first depth without advancing the fastener into the bone, advancing a leading end of the fastener along the stylet into the bone to a second depth without further advancing the stylet into the bone, and removing the stylet from the cannulated shaft of the fastener and the bone.

Various implementations described herein include a screw locking receiver. The screw locking receiver includes a receiver frame which has a first surface, a second surface opposite and spaced apart from the first surface, and an inner surface which extends between the first surface and the second surface. The receiver frame defines a cylindrical inner channel having a central axis. The receiver includes a counterbore which extends along a first portion of the inner surface. The receiver includes a plurality of threads extending helically about a second portion of the inner surface. The counterbore has a diameter that is sufficient to accept a screw head having a non-parallel central axis with respect to a central axis of the inner channel when in a fastened position.

The invention discloses free mouse multi-brain-region optical genetic manipulation head-mounted equipment based on an optical fiber array, and relates to the technical field of optical genetics, the free mouse multi-brain-region optical genetic manipulation head-mounted equipment comprises a skull fixing base, the skull fixing base is fixed to the surface of a mouse skull through bone screws, and a glass window is installed in the skull fixing base; according to the free mouse multi-brain-region optical genetic manipulation head-mounted device based on the optical fiber array, the signal output end of a light source generator is inserted into a signal input port, gaskets of different heights are selected to be matched with a limiting ring, the position of an insertion core array is adjusted, and the output ends of a plurality of insertion cores make contact with the upper surface of a glass window; z-axis fine adjustment is achieved by replacing gaskets of different heights, it is ensured that the end face of the ferrule is tightly attached to the surface of a glass window, light loss and scattering are avoided, the light spot positioning precision and the space consistency of stimulation depth are improved, the eight-channel ferrule array supports simultaneous input of optical signals of different wavelengths or modes, and multi-site and multi-parameter parallel optical genetic manipulation is achieved.

This invention relates to a nerve lengthening traction device, comprising a fixation device and a traction device. The fixation device includes a bone screw, and the traction device includes a traction mounting frame, a traction wire, a traction wire guide assembly, and a winding wheel. The traction mounting frame is fixed to the bone screw, and the winding wheel is rotatably fitted onto the traction mounting frame via an axle. One end of the traction wire is a nerve connection end fixedly connected to the nerve, and the other end of the traction wire is guided by the traction wire guide assembly to expose the tissue and is wound and fixed onto the winding wheel. The winding wheel is equipped with a nerve lengthening operation device that drives the winding wheel to rotate and can lock and retain it. This allows for periodic, fixed-length traction and retention of the nerve to prevent retraction, providing a guarantee for nerve repair experiments.

This application relates to an orthopedic bone screw, belonging to the technical field of medical devices. It includes a first threaded segment, a screw head, and a nut. One end of the first threaded segment is fixedly connected to the screw head. The nut is installed on the end of the first threaded segment away from the screw head. Multiple helical winglets are fixed on the first threaded segment. The helical winglets are fixed in the threaded groove of the first threaded segment. The helical winglets rotate in the same direction as the first threaded segment. With the bottom surface of the threaded groove as a reference, the end of the helical winglet screwed in is lower than the end of the helical winglet screwed out. This application has the effect of improving stability.

The invention provides a scoliosis biomechanical testing method, and belongs to the technical field of scoliosis testing, and the scoliosis biomechanical testing method comprises sheep spine bending and nail bar implantation. Sheep spine bending comprises the steps of cutting a sheep spine, fixing an end cover, connecting a translation tool and a clamping tool, driving a middle vertebral body of the sheep spine to move so as to bend the sheep spine, releasing an intervertebral disc with the maximum bending degree, filling denture powder for fixing, and turning segments above and below a lateral convex part of the sheep spine back to be vertical; nail and bar implanting comprises bone nail hole drilling, bone nail implanting and bar implanting. The sheep spine is selected to simulate the human spine, high similarity is achieved, human scoliosis is completely simulated through specific steps of bending and nail bar implantation, and biomechanical testing on human scoliosis is facilitated.

Disclosed is a bone screw and a fixation system specifically configured for fixing a bone fusion device into a human or animal body with the aid of a specifically designed fastening unit. A bone fusion system including at least two such bone screws in said bone fusion device is also disclosed along with said fastening unit.