70 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 utility model discloses a pelvic brittle fracture bionic hollow screw manufactured based on the 3D printing technology. The pelvic brittle fracture bionic hollow screw manufactured based on the 3D printing technology comprises a screw body, and the screw body comprises a screw tail, a supporting part and a screw head; a thread, a diversion trench and a microporous structure are arranged on the supporting part; the micropore structure comprises a plurality of point position sets spirally arranged on the supporting part, and the difference between every two adjacent point position sets is one fourth of the circumference. According to the pelvic brittle fracture bionic hollow screw manufactured based on the 3D printing technology, the screw body manufactured through the D printing technology is arranged, a micro-pore structure distributed in a topological configuration mode can be conveniently arranged on the screw body, bone cement can be conveniently spread around the screw body in a more dispersed mode through the micro-pore structure, and therefore the bone cement can be more evenly distributed on the periphery of the screw body. And the micropore structure is beneficial to bone tissue growth, so that the long-term stability of the screw is improved.

The utility model discloses a bone cement cannulated screw assembly which comprises a cannulated screw and an injector, the cannulated screw comprises a screw cap and a screw rod constructed to be of a hollow structure, the screw cap and the screw rod are integrally formed, an injection hole is formed in the screw cap, the injection hole is communicated with the hollow structure of the screw rod, threads are arranged on the screw rod, and a plurality of outflow holes are formed in the side face of the screw rod; the injector comprises a partition plate and an injection cylinder, the injection cylinder is detachably connected with the hollow nail, the hollow nail is screwed into the fracture position after the injection cylinder is connected with the hollow nail, an insertion groove is formed in the side wall of the injection cylinder, the partition plate slides in the insertion groove, and after the partition plate slides in the insertion groove in the first direction, the injection cylinder is partitioned to form a stirring groove. The bone cement stirring device has the function of rotating the hollow nail, can stir bone cement in the separated stirring grooves, can directly inject the bone cement into a fracture position, prolongs the solidification time of the bone cement, and improves the operation effect.

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.

The invention discloses a femoral neck fracture internal fixture implantation guider, and relates to the technical field of medical instruments, the femoral neck fracture internal fixture implantation guider comprises a positioning base plate, an extension sleeve inserted into an insertion hole is fixed at one axial end of a guide locking sleeve, and a settling tank is formed in one end, far away from the extension sleeve, of the guide locking sleeve; a plurality of circular-arc-shaped guide plates which are of an annular structure and are evenly distributed at intervals are arranged on the side wall, away from the notch, of the settling tank, a turnover block is rotationally arranged between the side walls of the two sides of the turnover gap, an abutting block is fixed to the side wall of the side, facing the guide space, of the turnover block, and the turnover block can be turned over and adjusted towards the side close to or away from the center of the penetrating space. And the size of the clamping space is adjustable. A clamping space with a proper size can be provided, a guide needle or a hollow screw can be driven into a bone for guiding, the hollow screw cannot deviate from a preset driving direction due to deviation of a force application direction of an electric screwdriver, a normal bone structure remaining at the femoral head and neck is prevented from being damaged by repeated penetration operation, a plurality of screw paths are generated, and the operation efficiency is improved. And the bone density is sparse.

The present invention provides an auxiliary guide device for inserting a solid screw in minimally invasive spinal surgery, comprising an outer sleeve and an inner sleeve; the outer sleeve comprises a cylindrical fixing portion, the lower end of which is provided with a cylindrical first outer positioning portion, the lower end of which is provided with a conical second outer positioning portion; the inner sleeve comprises a first inner positioning portion, the lower end of which is provided with a conical second inner positioning portion, the lower end of which is provided with a cylindrical third inner positioning portion. The present invention replaces hollow screws with solid screws and guide devices, thereby increasing the strength of screw placement and improving surgical efficiency.

Various bone cement guides are disclosed that can be connected directly to a hollow bone screw or to a spinal construction coupled to a hollow bone screw. In various embodiments, the cement guide may include a three-part assembly including a hollow outer sleeve (30) and a hollow inner sleeve (20) and a removable inner rod (10). In various embodiments, the hollow inner sleeve may be movable between a retracted position and an extended position, and in the extended position, a distal end of the inner sleeve may expand outwardly and capture a head portion of the hollow bone screw. In other embodiments, a distal end of the outer sleeve may surround and capture a tab of an extended tulip head connector, while the inner sleeve is coupled to an inner surface of the extended tulip head connector.

The invention is a construct consisting of a fully-threaded screw with an attached locking bolt that secures the posterior pelvis in a transiliac transsacral fashion, in the setting of an unstable posterior pelvic ring fracture. One part of the implant is a cannulated screw that has two pitches of different threads, which is placed over a guidewire and secured on the opposite side with a cannulated locking bolt that affixes to the screw. Washers on either side of the implant provide compression, and cancellous threads across the length provide fixation within the sacrum and the iliac bones on either side. This invention provides added strength and stability compared to current fixation methods consisting of screws in isolation.

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 utility model discloses a probe replacing frame of a gantry three-coordinate measuring machine, which comprises a movable seat, an upper adjusting plate and a lower adjusting plate which are stacked up and down, and a leveling assembly is arranged between the upper adjusting plate and the lower adjusting plate; the leveling assembly comprises a hollow screw, a fastening screw is inserted into the hollow screw, and the bottom of the fastening screw extends out of the hollow screw; a concave ball pad is fixed on the lower adjusting plate, and a convex ball pad is matched with the concave ball pad; the hollow screw is inserted from the upper adjusting plate, the bottom of the hollow screw abuts against the convex ball pad, and the fastening screw penetrates through the convex ball pad and the concave ball pad and is inserted into the lower adjusting plate. According to the leveling assembly, the moving seat can be conveniently and rapidly leveled, the replacement frame can be installed on the relatively horizontal moving seat, then the probe can be installed on the relatively horizontal replacement frame, and the installation precision of the probe is improved.

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.

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 discloses a micro-channel reactor, which belongs to the technical field of pipeline connecting structures and comprises a reactor body provided with a micro-channel and a joint inner core communicated with the micro-channel. The connector inner core is sleeved with a connecting nut. The hollow screw is in threaded connection with the connecting nut; the hose penetrates through the hollow screw and extends into the joint inner core; the pressing ring is located between the hollow screw and the connector inner core and arranged on the hose in a sleeving mode, and the two ends of the pressing ring stretch into the hollow screw and the connector inner core respectively. First conical surfaces are arranged at two ends; a plurality of cracking grooves are formed in one end facing the hollow screw; when the hollow screw is tightened, the hollow screw applies extrusion force to the first conical surface to promote radial shrinkage of the two ends of the pressing ring, so that the pressing ring is tightly attached to the hose; the multiple cracking grooves formed in the end of the pressing ring can improve the deformation effect of the pressing ring, the hose is stably clamped, it is guaranteed that the hose is stably communicated with the connector inner core, the higher pressure resistance value and the higher temperature resistance value are achieved, and falling and leakage are not likely to happen.

The present invention provides a reduction and positioning nail guide for posterior cruciate ligament tibial insertion avulsion fractures in the field of medical devices and a usage method. First, establish anterolateral and anteromedial approaches. The arthroscope enters the posteromedial compartment through the space between the posterior cruciate ligament and the medial femoral condyle via the anterolateral approach. After exposing the medial gastrocnemius tendon through the high-level posteromedial approach, insert the lens into the high-level posteromedial approach as the observation approach to expose the posterior cruciate ligament tibial insertion avulsion fracture fragment. Then, perform reduction and temporary fixation of the fracture fragment through the extremely high-level posteromedial approach using this device. Drill a Kirschner wire into the fracture fragment with the first sleeve and the second sleeve in this device, and screw in a hollow nail under the guidance of the Kirschner wire for fixation. It is convenient to reduce and fix the PCL tibial insertion avulsion fracture fragment, facilitate the fixation of the Kirschner wire and the hollow screw, can effectively avoid the risk of popliteal neurovascular injury, and the operation is simple and easy to establish, having extensive popularization and application value in the field of medical device technology.

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 invention provides an antenna housing replacement device, which comprises a guide hole base, a guide hole, a screw rod, a screw rod, a screw rod, a screw rod, a screw rod, a screw rod, a screw rod, a screw rod and a screw rod, the hollow screw is installed in the machine body supporting plate nut limiting hole, and the hollow screw is used for installing the guide hole base on a machine body structure; the drill jig plate is provided with a drill jig hole, and the drill jig hole is coaxial with the machine body supporting plate nut limiting hole; wherein the drill plate is connected with the guide hole base; the drilling jig is arranged in the drilling jig hole, and the drilling jig is used for drilling a hole in the antenna housing; the process screw penetrates through the drill jig hole and is connected with the hollow screw, and the antenna housing is fixed on a machine body structure; meanwhile, the invention further provides an antenna housing replacement method. The drilling device is convenient to use and high in drilling accuracy.

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 invention relates to the technical field of medical apparatus and instruments, in particular to a sacro-1 oblique sacroiliac joint hollow screw fixing sighting device which comprises an outer fixing support, a needle entry point hollow sleeve, a far-end sliding positioner and a needle exit point adjusting rod, and the outer fixing support comprises a near-end hollow module, an arc-shaped support and a far-end hollow module. The near-end hollow module and the far-end hollow module are connected to the two ends of the arc-shaped support respectively, a needle inlet point and an ideal needle outlet point are determined through a pelvis CT image according to the principle that a straight line is determined through two points and the characteristics of relatively stable bony tissue, and the needle inlet point and the ideal needle outlet point are adjusted by adjusting a far-end sliding positioner and a needle outlet point adjusting rod. The sacroiliac screw is accurately implanted, so that the device is simple in structure and easier to operate, the operation time is shortened, and the perspective frequency is reduced.

The present invention discloses a hollow screw assembly structure, which includes: a hollow screw and a sleeve, wherein the hollow screw and the sleeve are coaxially matched, the hollow screw including a threaded section, a first smooth section, and a clamping portion, the threaded section and the clamping portion being respectively located at both ends of the first smooth section, the clamping portion having a radially non-circular cross-section, the sleeve cavity being provided with an inner surface matching the clamping portion, the sleeve inner wall being provided with a protrusion, the clamping portion being provided with an elongated groove, the protrusion slidingly mating with the groove, the sleeve inner wall being provided with a first thread, the clamping portion cavity inner wall being provided with a sixth thread, the first and sixth threads being used to match the fifth thread of a nailing tool. The present invention provides a hollow screw assembly structure and a pressurizing tool, which have a simple structure, can achieve controllable pressurization through the pressurizing tool, and the screw sliding prevents shortening of the fracture end, and micro-motion stimulation promotes fracture healing.

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.

The invention discloses an integrated device for percutaneous minimally invasive extracorporeal reduction of vertebral fractures, comprising a track, a reduction arm, a hollow screw sleeve and an extended hollow screw; the track is provided with a length scale; the reduction arm connects the track and the extended hollow screw sleeve, the extended hollow screw is sleeved in the hollow screw sleeve, and the distal end of the extended hollow screw is designed as a spiral blade or a thread. The device combines the advantages of good reduction effect of traditional open reduction and internal fixation of thoracolumbar fractures with the advantages of PKP or PVP surgery in terms of immediate pain relief and rapid reconstruction of the stability of the injured vertebra, and achieves good correction of the physiological curvature of the spine, relieves pain and restores the function of the spine under the premise of minimally invasive, simple, safe and effective surgery.

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.