38 results about "Cannulated screw" patented technology

The present invention discloses an axial tolerance compensation arrangement 1 for the automatic compensation of tolerances between a first component A and a second component B, which has the following features: a nut element 10, preferably an annular nut element, with a radially outer fastening structure, in particular a bayonet structure, which can be fastened in a component opening 90, in particular a keyhole geometry, of the first component A, and an internal nut thread 22 of a first thread direction, a hollow screw 40 with a head 44 and a hollow cylindrical shank 42, which has on a radial outer side an adjusting thread 52 matching the nut thread 22 and on a radial inner side a fastening thread 56 with a second thread direction opposite to the first, which interacts with a fastening screw 80 of a second thread direction,so that the first component A and the second component B can be fastened to each other via the tolerance compensation arrangement 1, wherein the hollow cylindrical shaft 42 has a disassembly protection 60 at an axial end facing away from the head, which prevents the hollow screw 40 from being unscrewed from the nut element 10 during installation of the tolerance compensation arrangement 1.

The invention discloses a titanium-magnesium hollow screw system capable of promoting fracture healing and a manufacturing method. The titanium-magnesium hollow screw system comprises a titanium-based supporting structure and a magnesium filling layer. The titanium-based supporting structure comprises a main body part, the surface of the main body part is provided with an imitated bone trabecula part, and a plurality of bone gaps are formed in the imitated bone trabecula part; wherein bone gaps are filled with the magnesium filling layer, and the magnesium filling layer is combined with the titanium-based supporting structure in a physical embedding mode; the titanium-based supporting structure bears and maintains initial fixation and long-term bearing, so that the strength and the stability of the screw are ensured; the surface imitated bone trabecula and the communicated bone gaps increase the surface area and provide a physical channel for vascularization and bone tissue ingrowth, so that synostosis is promoted; the magnesium filling layer releases magnesium ions after being locally controllably degraded, so that osteogenesis and angiogenesis are favorably stimulated, the local biological environment is improved, instant mechanical support after an operation is ensured, bone healing is promoted through local biological activity release and structural orientation, the healing time is favorably shortened, and the healing quality is favorably improved.

A polyaxial pedicle screw assembly includes a receiver having a channel for receiving a rod and a central bore with a seating surface proximate a bottom opening. The assembly also includes a screw shank having a shank head at a proximal end and an anchor portion at a distal end configured for fixation to the bone, with the shank head having an outer spherical surface with a single common radius and an annular planar top end surface entirely surrounding an internal drive socket formed into a top end of the shank head. The assembly further includes a pressure insert having an upper surface for receiving the rod and a lower surface for engaging the outer spherical surface of the shank head to direct a downwardly-directed force from the rod to the screw shank in a locked configuration. The annular planar top end surface on the shank head remains spaced apart from the lower surface of the insert so as to not directly receive the downwardly-directed force therefrom in the locked configuration.

The invention discloses an intelligent bone cement injection system of a bionic hollow screw and a control method. An intelligent bone cement injection system of a bionic hollow screw comprises an intelligent profiling interface, a multi-channel independent injection and sensing module, a piezoelectric ceramic micropump, a central control module and a three-dimensional navigation verification module. Loading three-dimensional micropore topological data through a scanning screw, and constructing a personalized perfusion model; and dynamically distributing multi-channel flow based on the model. According to the intelligent bone cement injection system of the bionic hollow screw and the control method, the problems that in the prior art, bone cement injection equipment is not matched with a novel 3D printing screw interface, the injection process is uncontrollable, and directional strategies and real-time feedback are lacked are solved, accurate, uniform and safe filling of bone cement in a complex micropore network is achieved, and the bone cement injection efficiency is improved. The stability, the safety and the predictability of the internal fixation operation of the osteoporotic fracture are obviously improved.

This invention discloses a customized rectangular 3D-printed guide for the greater tuberosity of the humerus and its design method. The method includes: supplementing the original trapezoidal anatomical shape of the greater tuberosity of the humerus into a rectangle; calculating and finding the optimal needle insertion point; and using large-scale data analysis of dried humeral specimens to find a universal rectangular shape. Using thin-slice CT scans of the patient, reconstruction is performed using Mimics software, and further smoothing and guide design are achieved using Geomagic software. Finally, an anatomical standard parallel screw fixation guide that also facilitates reduction is designed. This invention uses the rectangular principle to more accurately locate the needle insertion point for cannulated screw fixation in split fractures; the precise design of the 3D-printed guide provides a foundation for the subsequent clinical development of related instruments and theoretical systems and their further clinical application; it improves the cure rate of this disease, reduces complications, further alleviates patient suffering, and improves patients' quality of life.

The utility model relates to the technical field of medical treatment, in particular to a gasket structure of an orthopedic hollow nail component, which comprises a ring body, a central hole is arranged at the center of the ring body, a groove is arranged above the central hole in a conducting manner, a salient point fastener is arranged on the inner side of the groove, a nail rod is inserted into the central hole, and the nail rod is connected with a hollow nail body. According to the hollow screw assembly for the orthopedics department, through the arrangement of the protruding point buckle, the center hole, the clamping groove and the threaded clamping ring, the hollow screw assembly can be conveniently screwed in in the clockwise direction when the hollow screw is placed in the process that the hollow screw assembly is put into the orthopedics department for treatment; according to the hollow screw, the gasket can be placed and pressurized together, so that tight combination between the gasket and the hollow screw is ensured, the gasket and the hollow screw are not separated when the hollow screw is taken out and rotated anticlockwise, the taking-out operation is simplified, and the surgical risk is reduced.

A Lisfranc reconstruction device includes a pair of operator grips mechanically linked to a first arm that includes a barrel and a second arm that includes a jaw whereby motion of the grips is mechanically transformed into relative translation of the barrel and the jaw for compression of a portion of a Lisfranc joint complex therebetween. The device includes a retention mechanism, such as a ratchet, to enable retention of the barrel and jaw when the desired position has been reached. The device may be provided in the form of a kit that includes a wire guide sleeve, a pilot wire, and a Lisfranc screw, in particular a cannulated Lisfranc screw that is sized to travel over the wire in a defined trajectory to facilitate proper screw placement. The device may be used for reconstruction of a traumatic injury to the Lisfranc joint complex.

The application provides an antenna cover replacement device, comprising: a lead hole base with a thin end and a thick end, the thin end of the lead hole base being provided with a body support nut limiting hole; a hollow screw installed in the body support nut limiting hole, the hollow screw being used for installing the lead hole base on a body structure; a drill template having a drill template hole coaxial with the body support nut limiting hole; wherein the drill template is connected with the lead hole base; a drill jig arranged in the drill template hole, the drill jig being used for drilling a hole on the antenna cover; and a process screw connected with the hollow screw through the drill template hole, the process screw being used for fixing the antenna cover on the body structure; meanwhile, the application also provides an antenna cover replacement method; and the application is convenient to use and has high hole drilling accuracy.

A smart medical device includes a structure configured to be at least partially implanted in a body, and an electronics cartridge that is configured to be inserted into the structure after the structure is implanted in the body. The structure may be a cannulated screw for use in treating bone fractures. The medical device includes an impedance sensor for monitoring and reporting on the healing state of bone fractures. The sensor includes components of the electronics cartridge and electrodes that are either associated with the cannulated screw or with the insertable electronics cartridge.

The utility model belongs to the technical field of orthopedic instruments, particularly relates to a hollow traction needle giving consideration to reduction and fixation, and solves the problems of complex operation, insufficient reduction precision and unstable fixation in the traditional fracture reduction and fixation process. A hollow traction needle with resetting and fixing functions comprises a fixing guider, a positioning needle, a guide needle and a hollow screw, and the fixing guider is provided with a main body and a handle arranged on the main body; a first through hole and a second through hole are formed in the length direction of the main body in a penetrating manner; the handle is held by an operator; the positioning needle is configured to be implanted into the bone through the second through hole so as to fix the angle and the position of the fixed guider; the guide pin is configured to be implanted into the bone through the first through hole; the hollow screw is provided with a center channel, can be arranged on the guide pin in a sleeving mode and is configured to be implanted into the bone through the first through hole under the guidance of the guide pin. The traction and internal fixation device has traction and internal fixation functions, can provide a stable fixation effect during fracture reduction, reduces operative wounds, and reduces postoperative complications.

An axial tolerance compensation device for automatically compensating for tolerances between a first component and a second component, comprising: a nut element having a radially outer fastening structure and an inner nut thread in a first direction, the fastening structure being fastenable in an opening of the first component; the head of the hollow screw is located at the first axial end of the hollow screw, the radial outer side of a hollow cylinder shaft of the hollow screw is provided with an adjusting thread matched with a nut thread, and the radial inner side of the hollow cylinder shaft is provided with a fastening thread in the second direction opposite to the first direction. The fastening thread interacts with the fastening screw such that the first part and the second part can be fastened to each other by means of the tolerance compensation device. The fastening thread comprises a towing structure such that the fastening screw can establish a releasable towing connection with the hollow screw by means of the towing structure, a towing torque < = 0.2 Nm such that when the fastening screw is rotated, the hollow screw can be synchronously rotated and moved into abutment with the second component, and after overcoming the towing torque and releasing the towing connection, the hollow screw can be moved into abutment with the second component. The fastening screw can be further screwed into the hollow screw.

The utility model discloses a pressure-adjustable hollow threaded nail device. The pressure-adjustable hollow threaded nail device comprises a fixing rod and a sleeve connected with the fixing rod in a sleeving mode. External threads are arranged at the front end of the fixing rod, a threaded hole is formed in the rear end of the fixing rod, an open groove matched with the fixing rod is formed in the front end of the sleeve, and a threaded through hole corresponding to the threaded hole is formed in the bottom of the open groove; wherein the threaded hole is connected with the threaded through hole through a threaded needle, and a locking nut used for applying pressure to the fixing rod is arranged on the portion, located on the outer side of the threaded through hole, of the threaded needle. The threaded needle is connected with the tail portion of the fixing rod, the fixing rod is pressurized by rotating the locking nut located on the second threaded portion, so that the femoral neck connected with the fixing rod can be tightly connected with the femoral neck connected with the sleeve, and meanwhile the scale marks are arranged at the tail portion of the sleeve. Therefore, the applied pressure can be adjusted by counting the rotation angle of the locking nut, and the fixing rod is prevented from loosening due to excessive drilling pressure on the femoral neck under the condition that the holding force of the femoral neck is kept.

The invention discloses a probe and method for probing a bony channel in sacroiliac screw implantation, and relates to the technical field of orthopedic surgical instruments, the probe comprises a hollow screw and a probe, the front end of the hollow screw is provided with a self-tapping part, the hollow screw is axially provided with a through hollow channel, and the hollow channel allows the probe to pass through; the probe comprises a rod body, a spherical head and a handle, and the spherical head is connected with the handle through the rod body. According to the hollow screw placement structure and method with the probe capable of feeding back the position of the bone channel in the sacrum, the spherical head of the probe can slide along the interior of the bone cortex of the sacrum after entering the sacrum, so that the situations that the bone channel of the hollow screw is irregular and narrow due to high-energy damage or sacrum dysplasia are prevented; therefore, the hollow screw penetrates out of the bone cortex, and serious nerve and blood vessel injury is caused. The probe technology not only can improve the operation safety and efficiency, but also can reduce the number of times of fluoroscopy in the operation.

The present invention discloses an axial tolerance compensation arrangement (1) for automatically compensating tolerances between a first (A) and a second component (B), which has the following features: a nut element (10), preferably an annular nut element (10), with a radially outer fastening structure (12), in particular a bayonet structure, which can be fastened in a component opening (O1), in particular a keyhole geometry (90), of the first component (A), and an internal nut thread (22) of a first thread direction, a hollow screw (40) with a head (44) at a first axial end (62) of the hollow screw (40) and a hollow cylindrical shaft (42) which has an adjusting thread (52) on a radial outer side matching the nut thread (22) and a fastening thread (56) on a radial inner side with a second thread direction opposite to the first,which interacts with a fastening screw (80) of the second thread direction, such that the first (A) and the second component (B) can be fastened to one another via the tolerance compensation arrangement (1), wherein the fastening thread (56), preferably adjacent to a second axial end (64) of the hollow screw (40), has a drag element, so that the fastening screw (80) can be connected to the hollow screw (40) via the drag element by a releasable drag connection, wherein a drag torque is preferably ≤ 0.2 Nm, particularly preferably ≤ 0.1 Nm, so that when the fastening screw (80) is turned, the hollow screw (40) can be turned and moved in contact with the second component (B), and the fastening screw (80) can be screwed further into the hollow screw (40) after overcoming the drag torque and releasing the drag connection.

The invention relates to the technical field of drilling equipment, in particular to multi-directional drilling equipment for hollow screw machining, which comprises a rack, a fixed disc and a cutter disc are arranged on the rack, the cutter disc coaxially corresponds to the fixed disc and is positioned above the fixed disc, and the distance between the cutter disc and the fixed disc is adjustable; a rotating disc is coaxially and rotationally arranged in the fixed disc, a plurality of clamping pieces are evenly distributed in the circumferential direction of the rotating disc and used for clamping screws to be machined, an annular groove is further coaxially formed in the inner bottom of the fixed disc, and the rotating disc can drive the multiple clamping pieces to rotate along the annular groove when rotating. Therefore, all the clamping pieces are sequentially located at the feeding position, the multiple machining positions and the discharging position. The tool disc is provided with a plurality of tools, the tools correspond to the machining positions one to one, when the clamping pieces rotate around the annular groove by a circle, the tools can machine axial holes and radial holes in the to-be-machined screws, and the machining efficiency of the hollow screws is improved.

The invention belongs to the technical field of medical instruments, and particularly relates to a scoliosis magnetic reset device and a use method thereof. The scoliosis magnetic reduction device is accurately fixed to vertebral arch plates on the two sides of a vertebral spinous process through the multiple pairs of hollow screws, and the problem of local compression caused by a hard frame of a traditional mechanical brace is effectively solved. The adjustable first electromagnetic rod, the matching connecting block, the T-shaped electromagnetic rod and the electromagnetic top frame form an exquisite structure, and the electromagnetic beam with the distance adjusted through electromagnetic force can achieve refined and gentle control over the correction strength according to the actual condition of a patient, the defect that the strength of a traditional traction instrument is difficult to control accurately is overcome, and the use safety of the patient is improved. The problem that spinal tissues are damaged by excessive traction or the correction effect is influenced by insufficient strength is avoided. By means of the innovative design, the correction process is more scientific and safer, the correction effect is ensured, meanwhile, the safety and effectiveness of scoliosis correction are greatly improved, and a more comfortable and efficient new treatment choice is brought to a patient.

The invention discloses a periosteum distraction device. The periosteum distraction device comprises a distraction plate, at least one barrier plate, a distraction screw and a steel needle. A threaded hole and a cylindrical fixing hole I are formed in the center of the distraction plate; the blocking plate is located below the stretching plate, and a center hole and a second cylindrical fixing hole are formed in the center of the blocking plate. The distraction screw is a hollow screw and is used for being screwed into the threaded hole along the steel needle; and the steel needle is used for penetrating through the central hole and drilling into sclerotin to be fixed. The diameter of the center hole is smaller than the outer diameter of the distraction screw, and a steel needle can pass through the center hole. The blocking plate is arranged below the distraction plate, the distraction screws are effectively prevented from penetrating into bone cortex in the distraction process, the risks of bone destruction, fracture and osteomyelitis are reduced, meanwhile, local pain in the distraction process is relieved, and the periosteum distraction device is suitable for periosteum distraction treatment of osteoporosis patients.

Disclosed herein is a unique Variable Angle Loading Thread that can be utilized on a cannulated or non-cannulated screw, wire, or pin for a variety of end-uses, such as surgical purposes fastening fractured bones together and / or for attaching bone tissue to surrounding tissue. More particularly, this disclosure relates to an industrial and / or surgical medical thread form having a highly angled and extended thread configuration for increasing the pullout strength of the screw as well as torque resistance thereof. For surgical activities, as an example, such characteristics provide effective strength and torque resistance before bone stripping upon implantation. Whether provided with long or short thread (partial or full threading, in other words), such a unique angled and extended thread provides effective surgical fixation fastening fractured bones together and / or for attaching bone tissue to surrounding tissue and / or increasing healing capabilities.

The utility model relates to a gun type support of auxiliary percutaneous hollow screw implantation, which comprises: a side support, an insertion hole area and a side sticking area distributed in upper and lower directions; a plurality of guide needle insertion holes are arranged in the insertion hole area; a top support, which is provided with two developing needle insertion holes, the two developing needle insertion holes are respectively located on the left and right sides of the top support; the developing needle insertion holes and the guide needle insertion holes are parallel to each other; the top end of the side support is connected with one end of the top support, so that the two are in the shape of 7 as a whole; the top of the top support forms a top sticking area; a sticking strip is used to fix the support on the skin outside the femoral neck through the side sticking area of the side support and the top sticking area of the top support. The utility model is simple in comparison with the prior art in establishing the operation of external reference, three guide needles are combined through preliminary fixation and accurate implantation under a C-arm machine, and the three guide needles and hollow screws can be quickly and accurately implanted in the femoral neck.

A polyaxial pedicle screw assembly including a receiver having a channel for receiving a rod and a central bore with a seating surface proximate a bottom opening. The assembly also includes a screw shank having a shank head at a proximal end and an anchor portion at a distal end configured for fixation to the bone, with the shank head having an outer spherical surface with a single common radius and an annular planar top end surface entirely surrounding an internal drive socket formed into a top end of the shank head. The assembly further includes an insert having a lower surface and an upper surface. The lower surface is configured for engaging the outer spherical surface of the shank head to apply frictional force to the screw shank head. The upper surface is configured to be positioned under a downward facing surface in the central bore of the receiver.

The utility model relates to a femoral neck cannulated screw guide pin positioner, the femoral neck cannulated screw guide pin positioner comprises a pair of guide columns and a fixing assembly, a bulb is fixed on the side portion of each guide column in a protruding mode, and the fixing assembly comprises an upper clamping piece, a lower clamping piece and a fixing piece. The upper clamping piece and the lower clamping piece are suitable for clamping the ball head to enable the guide columns to be located on the left side and the right side respectively, and the fixing piece is rotatably installed on the upper clamping piece and the lower clamping piece to enable the upper clamping piece and the lower clamping piece to be close to each other to clamp the ball head so that the guide columns can be adjusted in any direction. After adjustment is completed, firm fixation can be achieved, and it is ensured that the guide needle is kept stable in the process of being placed through the guide column and is not interfered by body factors of a patient.

The application provides a pelvic fracture channel screw, wherein the pelvic fracture channel screw comprises a fixed screw and an auxiliary screw; a first shank and a first head are fixedly connected to form the fixed screw; a hemispherical cavity in the first head is communicated with a cylindrical cavity in the first shank; a taper hole is arranged on a side wall of the first head or a joint of the first head and the first shank, an axis of the taper hole and an axis of the first shank form a predetermined angle, and the taper hole is communicated with the hemispherical cavity and the cylindrical cavity; a second head and a second shank are integrally formed to form the auxiliary screw; the second head is provided with a universal groove, and the second head is provided with an external thread matched with the taper hole; and the auxiliary screw can swing in a preset angle range in the taper hole through the universal groove. The application solves the problem that the traditional hollow screw is easy to fail when used for fixing in the pelvic fracture in the prior art, and further enhances the holding force of the pelvic fracture channel screw.

The invention relates to a quick fastener comprising a hollow screw having an external thread on a radial outer side, a through-channel which is tapered adjacent to the second axial end by a circumferential inner radial collar, a bayonet screw having a shaft which passes through the through-channel of the hollow screw, a head which is arranged at the end of the shaft and has a drive feature, at least two locking pieces which are arranged at a distance from the head, extend radially from the shaft and are arranged uniformly around the shaft, and a blocking collar which is arranged axially between the head and locking pieces, extends radially beyond the shaft and has a plurality of rotation-inhibiting contact surfaces, and a multi-functional disc with a central opening and a plurality of securing pieces projecting into the opening.

The present invention discloses a quick-release fastener 1 with which a first component A and a second component B can be fastened to one another at a distance from each other, which has the following features: a hollow screw 10 with a first 14 and a second axial end 16 and an external thread 18 on a radial outer side, a through channel 12 which is tapered adjacent to the second axial end 16 by a circumferential inner radial collar 24, a bayonet screw 30 with a shank 32 which passes through the through channel 12 of the hollow screw 10, a head 34 arranged at the end of the shank 32 which has a drive feature 20;22 and a support surface 36 extending radially beyond the shaft 32, comprising at least two locking lugs 40 spaced apart from the head 34, extending radially from the shaft 32 and arranged evenly around the shaft 32, and a blocking collar 46 arranged axially between the head 34 and the locking lugs 40, extending radially beyond the shaft 32 and comprising a plurality of anti-rotation contact surfaces 47, a multifunctional disc 50 with a central opening 55 and a plurality of mounting lugs 54 projecting radially into the opening; 56.;

An intelligent medical device includes a structure configured to be at least partially implanted in a body, and an electronics cartridge configured to be inserted into the structure after implanting the structure in the body. The structure can be a cannulated screw for treating a bone fracture. The medical device includes an impedance sensor for monitoring and reporting the status of the bone fracture healing. The sensor includes an electronics cartridge assembly and an electrode associated with the cannulated screw or with the insertable electronics cartridge.

Hollow screw,- with a shaft (2) having an external thread (6) on the outside and a cavity (7) on the inside,- with a head (3) arranged at a first longitudinal end (8) of the shaft (2) and having a torque introduction contour (9),- with a throttling element (4) for throttling a flow through the cavity (7) with a fluid,- wherein the shaft (2) has an axial opening (15) at its second longitudinal end (14) which is fluidically connected to the cavity (7),- wherein the shaft (2) has at least one radial opening (16) axially spaced from its second longitudinal end (14) which is fluidically connected to the cavity (7),- wherein the throttling element (4) is adjustable relative to the shaft (2) between a first throttling position (DSI) and a second throttling position (DSII), which differ from each other by different throttling effects,- wherein the throttle element (4) is arranged linearly adjustably on or in the shaft (2) along a longitudinal central axis (5) of the shaft (2), characterized in that the throttle element (4) is arranged linearly adjustably on or in the shaft (2) such that in the first throttle position (DSI) the throttle element (4) is arranged in the cavity (7) or directly at the axial opening (15), while in the second throttle position (DSII) the throttle element (4) is arranged outside the cavity (7) and axially spaced from the axial opening (15).

The application belongs to the field of orthopedic medical instruments, and provides a cervical vertebra hollow screw and an integrated screw placement and rod pressing device. The cervical vertebra hollow screw is characterized in that a ball head screw is sleeved at the lower end of a screw seat, a U-shaped groove is arranged at the upper end of the screw seat, a spherical ring is arranged between the ball head and the screw seat, the ball head screw is limited to move in a conical surface in the screw seat through the spherical ring, a through hole is arranged in the ball head screw, sleeve clamping holes are arranged at both sides of the cervical vertebra hollow screw, the cervical vertebra hollow screw is provided with a through hole for a positioning needle to be inserted into the through hole for positioning and guiding, a robot can be used to assist in accurately placing the positioning needle, and the integrated screw placement device is used to carry the cervical vertebra hollow screw to complete screw placement through the positioning needle. After the screw is placed, the screw rod is disassembled, the screw sleeve is reserved, and the rod pressing operation is performed, so that the rod can be quickly and accurately pressed into the U-shaped groove of the cervical vertebra hollow screw, the screw placement and rod placement process is completed, and the operation efficiency is improved.