891 results about "Iliac screw" patented technology

The invention relates to a tibial plateau prosthesis. The tibial plateau prosthesis mainly comprises a tibial spacer, a tibial plateau and a sleeve. The tibia gasket is provided with a first fixing block and three arc-shaped holes, and movable second fixing blocks are arranged in the holes. The tibial plateau comprises a plateau support with open holes and a shell, and the open holes are formed in the side portion and the bottom of the shell. The screw penetrates through the gasket and the platform support to be inserted into the shell, and outer threads of the screw are meshed with inner threads of the sleeve. The sleeve moves upwards and extends out of the side hole of the shell through a hinged connecting rod system to penetrate into the medullary cavity to enhance fixation. A spring is arranged in the screw to drive the first pushing part and can be matched with the sleeve to prevent downward movement; and meanwhile, the second pushing part in the screw can extend into the medullary cavity from the bottom through threads. The design realizes multidirectional fixation and improves the stability of the prosthesis.

A tamper for making paraffin blocks for histology may include a pliable tamper head and a handle. The handle may be permanently or removably attached to the tamper by using screws, magnets, or the like. The tamper may be made from a pliable material, such as a silicone rubber, with improved thermal transfer and high latent heat. In use, the tamper may be warmed in advance to a working temperature by placing the tamper on a hot plate of the embedding station or on a dedicated smaller hot plate. Alternatively, the tamper may be heated with an electric resistive element, a thermoelectric device, or an electric induction coil.

Disclosed herein is a system and method for performing pre-operative planning of total joint arthroplasty. The planning tool builds a model and analyzes and visualizes movement of the joint for various selections of implant models and placement of the components on the implants on the patient's anatomy. The tool also analyzes and visualizes motions of the joint during common activities of daily living and analyzes and functional ranges. The tool provides real time clinically relevant parameters to inform pre-surgery planning. The tool provides screw orientation visualization.

The invention of the gradient porous structured sacral prosthesis and the manufacturing process aims to create an alternative replacement for bone loss in patients who require bone replacement. The gradient porous structured sacral prosthesis consists of an artificial bone fragment, a metal rod, and a set of screws for fixing the fragments. The manufacturing process consists of seven steps: Identifying the position and boundaries of the bone, First-step topology optimization, Second-step topology optimization, Defining the structural pattern and unit cell size, Designing the artificial bone implant, Mechanical performance testing of the implant, and Fabrication of the sacral implant. The devices and processes according to the present invention are clearly sequenced and characterized. Modification or change in the manufacturing sequence or use may reduce the capabilities of the present invention or make it unusable for the purposes of the present invention.

A sacroiliac (SI) joint implant assembly addresses SI joint dysfunction and degenerative sacroiliitis. The assembly includes a first implant body, a second implant body, and a piezoelectric layer positioned between them. The piezoelectric layer generates electrical charges when subjected to mechanical stress, stimulating bone growth and enhancing stability of the SI joint after surgery. The implant bodies may feature non-planar surfaces to distribute compressive and shear forces unevenly across the piezoelectric layer. The assembly can be secured using fasteners such as screws, pins, or brackets, and may include porous or fenestrated bodies made from materials like titanium or polymers. Some implant assemblies are designed for minimally invasive surgical procedures, with configurations that allow for precise placement using guide wires and imaging techniques. The assembly aims to stabilize the SI joint and promote bone fusion, leveraging the piezoelectric effect to improve the overall efficacy of the fusion procedure.

The invention provides a spinal pedicle screw implantation system based on a multi-modal image and MR navigation, and relates to the technical field of screw implantation, the system comprises a preoperative image processing module used for identifying bony characteristics of a patient and delimiting a screw implantation safety boundary according to the bony characteristics; and the bone image fusion navigation module is used for analyzing to obtain anatomical data of the patient, and calculating a screw implantation path according to a crown porcupine optimization algorithm in combination with bony characteristics. And the body position correction module is used for calculating the body position deviation value and synchronously adjusting the screw implantation path according to the body position deviation value and the screw implantation safety boundary. And the path risk early warning module is used for calculating the distance between the surgical tool and the key tissue in real time, and performing collision risk assessment and early warning. And the postoperative evaluation module is used for quantitatively evaluating the screw implantation precision and generating a postoperative report. According to the method, more accurate positioning can be provided for screw implantation, the accuracy of a screw implantation path is ensured, early warning is performed through extraction, a doctor is reminded to take measures in time, and operation safety is ensured.

The invention relates to the technical field of orthopedic surgery, and discloses an orthopedic surgery real-time navigation system based on multi-modal image fusion and artificial intelligence. The multi-modal image fusion module is used for generating a three-dimensional skeleton and soft tissue fusion model for surgical navigation; the artificial intelligence analysis module is used for determining a fracture line, a screw implantation angle and a cutting track; the intraoperative tracking module is used for generating a real-time correction instruction; the verification updating module is used for carrying out rationality verification on the real-time correction instruction; if the inspection is not passed, an alarm mechanism is triggered, instantaneous motion state parameters of the surgical instrument are collected, the instantaneous motion state parameters are compared with the cutting track, and the correction instruction is updated according to the comparison result; and the execution module is used for driving the surgical instrument to execute the surgical operation according to the updating correction instruction. According to the invention, manual operation errors can be effectively reduced.

A tibia prosthesis comprises a tibia gasket, a platform support and a pushing part. A first fixing block connected with the femoral condyle is arranged on the upper portion of the gasket, a first opening is formed in the middle of the gasket, and second fixing blocks are arranged in three surrounding second openings. A third opening is formed in the first groove in the side face of the gasket, and a first limiting block with a fifth opening is arranged in a fourth opening in the bottom. A spring in the third opening pushes the second limiting block to be clamped into the fifth opening. The platform support is provided with a sixth opening and a second groove, a fourth limiting block capable of being opened is arranged in a seventh opening in the upper portion, and a fifth limiting block is hinged into the second groove. A pushing part is arranged in a lower shell of the platform support and comprises a hexagon screw and a fixing ring, a ninth opening is formed in the screw, and the fixing ring is connected with the rotating part through a ratchet wheel. And during rotation, the rotating part pushes the first limiting block to enter the seventh opening, the fourth limiting block is retracted and limited after being opened, and meanwhile, the second limiting block is clamped into the fifth opening to be fixed. And the second fixing block is clamped into the ninth opening to connect the screw and the gasket. And when the rotating part enters the second groove, the fifth limiting block is pushed to be clamped into the second groove, and overall fixing is completed.

The invention provides a femoral stem prosthesis. The femoral stem prosthesis comprises a femoral stem, an expansion component and a sleeve. The femoral stem is composed of an upper stem body and a replaceable lower stem body, and threads are arranged in the femoral stem. The expansion part is located in the upper handle body and comprises a screw, a rotating disc and a multi-layer pushing structure. The screws are connected with the upper and lower handle bodies through threads; and the turntable is in threaded engagement with the screw and can drive the first pushing part along the first guide rail during rotation. Ratchets are arranged in the rail component and meshed with the pawls of the second pushing part, and an open hole is formed in the side of the second pushing part. And the sleeve is linked with the expansion component through the fifth pushing part, the fourth pushing part and the third pushing part. During implantation, the second pushing part outwards pushes the sleeve to be attached to the wall of the medullary cavity, the internal pushing structure acts successively under the counter-acting force, and finally the first pushing part is separated from the second pushing part. Then bone cement is injected through a sleeve micropore, and the stability of the prosthesis is enhanced. By means of the design, intraoperative adaptation and stable filling are achieved.

Systems and methods for automatically determining pedicle screw trajectories for surgery may be provided. A scan of a spine may be received, and positions of one or more vertebra and one or more components of the one or more vertebra in the scan may be identified. Next, a screw trajectory planning algorithm may determine an initial screw trajectory plan using the positions of the one or more vertebra and the one or more components. The screw trajectory planning algorithm may then determine a revised screw trajectory plan by revising the initial screw trajectory plan according to weighted factors.

An intramedullary bone fixation device includes an elongate member having a proximal section, a distal section, and a transformative section between the proximal and distal sections. The proximal section includes a first threaded section with threads having a first pitch. The distal section includes a second threaded section with threads having a second pitch. The transformative section includes a plurality of segments disposed generally vertical between the proximal and distal sections, each segment including male and female engagement portions. One or more inner surfaces of the segments define a threaded aperture through the transformative section. A screw adapted to be placed through the threaded aperture includes a first set of threads adapted to engage threads of the threaded aperture, a distal second set of threads, and a proximal third set of threads, the second and third sets of threads having a different pitch than the first set of threads.

An electronic device that monitors usage of medical devices (such as a surgical instrument, a surgical screw, surgical supplies or a surgical machine) is described. During at least a medical procedure, the electronic device monitors the use of medical devices in a tray of medical devices or a peel pack of medical devices. Then, the electronic device may provide, addressed to a computer system, a utilization report based at least in part on the monitoring. The utilization report may include historical usage of medical devices: in a type of the medical procedure, for a type of patient and / or by a given medical provider.

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.

Tracking objects in medical procedures. At least one example is a method comprising: retaining a bone marker on a distal end of an installation tool, the bone marker comprising a polyhedron having a fiducial pattern on each of at least three outward facing surfaces of the polyhedron, an externally-threaded screw extending distally from the polyhedron, and a flange proximate to an intersection of the polyhedron and the externally-threaded screw; positioning a distal end of the externally-threaded screw against a bone at a marker location; screwing the externally-threaded screw into the bone by way of the installation tool; and trapping tissue against the bone beneath the flange.

An electronic device that identifies a medical device (such as a surgical instrument, a surgical screw, surgical supplies or a surgical machine) is described. During operation, the medical device may receive or obtain a first image of the medical device, where at least a portion of the medical device is partly obscured by an object in the first image or is damaged or degraded. Then, the electronic device may identify the medical device based at least in part on information associated with a second portion of the medical device that is not partially obscured by the object or that is not damaged or degraded, where the information may include a visual attribute of the medical device.

A method includes displaying, on a graphical user interface, a planned position of a virtual implant model relative to a virtual bone model of a bone. The virtual implant model includes a plurality of virtual screw holes offset from a central axis of the virtual implant model. The method also includes determining a planned rotational orientation of the virtual implant model by rotating, on the graphical user interface, the virtual implant model about the central axis of the virtual implant model such that the plurality of virtual screw holes rotate about the central axis. The method also includes controlling a robotic device to guide preparation of the bone to receive a physical implant in the planned position. The method also includes providing computer-assisted navigation configured to guide the physical implant into physical rotational alignment with the planned rotational orientation of the virtual implant model.

This invention discloses a guide plate device for spinal osteotomy and correction. Each first support member is fixed to the first guide plate body for connection with screws. The first guide plate body has a first window for locating the spinal laminectomy area. A rib resection groove is formed at the edge of the first window to determine the rib resection area. There are two rib resection grooves, arranged opposite each other on both sides of the first window. Each second support member is fixed to the second guide plate body for connection with screws. The second guide plate body has a second window for locating the pedicle osteotomy guide plate's resection area. There are two second windows, arranged opposite each other. The spinal laminectomy guide plate and the pedicle osteotomy guide plate share a single screw assembly. This invention avoids errors in judging the resection area based on human experience, and also avoids hand-holding the guide plate and guide plate position deviation during surgery.

The LNTPI is a surgical instrument used to cut through fibrotic and edematous tissue to define the natural tissue plane of dissection. After defining the natural tissue plane, it is designed to move or carefully insinuate tissues along these natural planes without cutting the tissue, so that targeted organs or parts thereof could be viewed and reached during laparoscopic procedures. The following features make the LNTPI unique compared to standard blunt dissectors used in laparoscopy: 1. The tip of the LNTPI is coarse and not smooth. The tip has diagonal, spiral ridges from the sides which are carried onto the tip converging as a single spiral at the center of the tip, creating a pattern resembling that of a screw; 2. The ridges of the LNTPI are comprised of asymmetrical triangular ridges with an acute angle at the apex that may be leaning along with or against the rotation of the spiral; 3. The tip of the LNTPI is made of tungsten carbide metal instead of stainless steel; 4. Dissection can be done in the usual up, down, left, and right motions as standard dissectors; 5. The side of the LNTPI can be used to "peel" tissue by using the ridges on its side combined with a twisting movement. This maneuver cannot be performed using standard dissectors; and 6. The tip of the LNTPI can perform circumferential dissection when used with a twisting movement causing it to engage tissue like a "drill" along the natural tissue plane. The ridges that converge into a single spiral at the tip of the invention appear like a screw and with the proper twisting movement have a similar effect on tissue. Because of the texture, design, and material used for the tip of the LNTPI, it has the following advantages over standard dissectors: The LNTPI can engage tissues more easily even if the tissues are slippery due to the presence of blood or fluids. The LNTPI can be used to engage tissues through a twisting motion which motion allows the tissues to be engaged in a specific manner that defines natural tissue dissection planes. The LNTPI can insinuate / "peel" tissue by using the side spiral ridges in combination with a twisting movement. The LNTPI can perform circumferential dissection by using the tip and the convergence of the spiral ridges at the center of the tip in combination with a twisting movement. The transfer of lateral shear force to the tissue at various angles (45, 90, and 180 degrees) when using the LNTPI is significantly higher whether the motion is by a sweeping motion or twisting of the instrument, allowing it to insinuate better than standard instruments, especially in a wet field. Hand movements needed in insinuating tissue using the LNTPI are different from the usual hand movements when using standard dissection instruments. The hand movements in using LNTPI require less muscular effort and repetitiveness, thus preventing muscle fatigue and repetitive use injury among surgeons. The instrument is reusable, as compared to dissectors that have fabric at the tip, which must be disposed of and replaced once the fabric tip fully absorbs the blood or other fluid in the wet tissue surface.

The invention relates to a hinge type knee joint prosthesis which comprises a thighbone component (101), and the thighbone component comprises two condyles (101c and 101c ') and a hinge box (237). A tibial component (108); and a connecting member (150) connected to the tibial member (108) and the femoral member (101). The connecting component (150) comprises a box cover (102) connected with the thighbone component (101); the t-shaped joint (103) is connected with the box cover (102); the pivot pin (104) is connected with the t-shaped joint (103) and the box cover (102); the axial bushing (105) is connected with the pivot pin (104) and the t-shaped joint (103); and the axial locking screw (106) is used for fixedly connecting the axial bushing (105), the pivot pin (104) and the t-shaped joint (103) with one another. The box cover (102) comprises a connecting piece (201). The connecting piece (201) is used for avoiding contact between the femoral component (101) and the t-shaped connector (103).

Devices, systems, and methods for a robot-assisted surgery. A surgical robotic system with integrated navigation and multiple surgical arms may assist a user with one or more surgical procedures. In addition to the multiple surgical arms, the robotic system may also have peripheral arms to position a navigation camera and surgeon displays. The robotic system is collaborative to allow for easy integration into procedural workflows, for example, to install pedicle screws, interbody implants, or other surgical devices.

The utility model discloses a horizontal clamping screw retention type loose tooth fixing device, which comprises a lip-cheek side splint, a lingual palatal side splint and a retention screw, the lip-cheek side splint and the lingual palatal side splint respectively comprise a tooth fitting part and a retention part, the lip-cheek side splint and the lingual palatal side splint are respectively clamped on the inner side and the outer side of a tooth, and the retention screw is fixed on the lip-cheek side splint and the lingual palatal side splint. The opposite surfaces of the tooth fitting part are respectively matched with the lip buccal surface and the tongue palate surface of the tooth in shape, and the retention part is embedded in the tooth gap or the tail end of a dental arch and is fixedly connected through a retention screw. The dental implant can be used at the early stage of tooth loosening, and dentition defects can be repaired in time without affecting subsequent periodontal treatment.

Intramedullary aiming systems, instruments, and methods of treating bone fractures are provided. The aiming systems may include one or more instruments configured to ensure optimal alignment and placement of one or more components of an intramedullary nailing system, such as anteversion alignment, anti-rotation, lag screw aiming, distal aiming, and other instruments suitable to enhance and optimize the surgical procedure.

This invention discloses a spinal endoscopic screw-rod fixation system, belonging to the field of medical device technology. The system includes screws, locking pins, and connecting rods. The screw head has a fixing hole with internal threads on the inner wall and a driving hole at the bottom. The proximal end of the screw forms an arc-shaped mating surface around the fixing hole. The locking pin has external threads matching the internal threads, and a spherical clamping surface is formed on the side of the clamping head facing the connecting block. This invention, through the arc-shaped mating between the screw, locking pin, and connecting block, allows the connecting block to adapt to the screw at multiple angles, facilitating insertion and locking in spinal endoscopy or minimally invasive small-incision environments. The flip-handle mechanism facilitates tightening the locking pin in confined operating spaces and prevents arbitrary disassembly of the locking pin, improving the operational convenience and safety of the fixation system.

The invention relates to a component arrangement for a medical device comprising a first component with an outer surface, an inner surface and at least one recess extending between the outer surface and the inner surface, a second component comprising at least one screw boss with a longitudinally extended boss shaft and a bore, wherein the second component is arranged on the outer surface of the first component, the boss shaft projecting axially into the recess, and wherein an end face of the boss shaft does not project axially beyond the inner surface of the first component, and at least one screw with a screw shaft and a screw head, wherein the screw shaft is screwed into the bore and the screw head is axially supported on the inner surface of the first component, wherein the first component is subjected to compression between the screw head and the second component and the boss shaft is subjected to axial tension.which means that the first component is screwed to the second component.

This invention relates to a novel P-approach endoscopic lumbar fusion surgery method, belonging to the field of lumbar fusion surgery technology. This method addresses the high risk of nerve injury and insufficient operational precision in existing endoscopic fusion techniques by proposing an improved solution. It utilizes Kirschner wires for positioning at the inferior articular process to establish a precise entry point avoiding the nerve root pathway; a visually guided circular saw is used throughout the endoscopic procedure to construct a safe triangular working channel directly reaching the spinal canal; under full endoscopic monitoring, a unilateral approach is used for bilateral spinal canal decompression, thoroughly removing diseased tissue and scraping the endplates until punctate bleeding occurs; a bone graft cannula with a curved tip is used to precisely implant the fusion device into the anterior region of the intervertebral space, restoring intervertebral height through a self-locking structure; finally, a universal pedicle screw is percutaneously implanted for fixation. This method reduces the risk of nerve injury, improves surgical safety and efficiency, and is suitable for patients with lumbar spondylolisthesis complicated by spinal stenosis.

The utility model discloses a litchi maintenance pruning structure which comprises two sets of shearing parts, each shearing part comprises a handle and a knife edge, the handles and the knife edges are integrally connected, the two sets of shearing parts are hinged in a staggered mode, a protection component is further arranged on the surface of each handle, and each protection component comprises a telescopic sleeve arranged on the surface of the corresponding handle in a sleeving mode. Limiting screws are installed on the surface of the telescopic sleeve, a plurality of sets of limiting grooves matched with the limiting screws are distributed in the surface of the handle at equal intervals, the surface of the telescopic sleeve is further sleeved with an anti-skid sleeve, and anti-skid lines are arranged on the outer surface of the anti-skid sleeve. According to the multifunctional pruning knife, through the arrangement of the protection component, the length of the handle can be adjusted in the using process, pruning work of branches of different heights can be met, meanwhile, hands can be effectively prevented from being pinched when the multifunctional pruning knife is used, and after the multifunctional pruning knife is used, the multifunctional pruning knife can be conveniently stored, and accidents are prevented.

The application belongs to the field of medical devices, and particularly relates to a humeral shaft middle-distal fracture anterolateral MIPPO bone plate, which comprises a bone plate main body, a plurality of screw holes one are uniformly arranged on the proximal end to the middle end and the distal end of the bone plate main body, a plurality of screw holes two are arranged on the distal end of the bone plate main body, the diameter of the screw hole one is greater than the diameter of the screw hole two, the screw holes of the proximal end and the distal end of the bone plate are respectively provided with screw holes matched with screws of different diameters, the structure of the bone plate is designed on the basis of CT scanning data of humeral bones of a plurality of patients, and the bone plate is designed according to the structure of the reconstructed three-dimensional model of the humeral bone, so that the bone plate is more in line with the anatomical characteristics of the patient, and the bone plate is more suitable for anterolateral MIPPO surgery in cooperation with a matching device, indirect reduction of a fracture can be realized, the operation is further simplified, the operation time is saved, the amount of bleeding is reduced, and the surgical trauma is reduced.

The invention belongs to the technical field of medical instruments, and discloses a neurosurgery head frame capable of achieving image recognition and position adjustment and a using method, and the neurosurgery head frame comprises a supporting base, a head supporting ring and a plurality of fixing head nail suites; the top end of a vertical plate of the supporting base is provided with an arc-shaped groove sliding way which is arranged in an inwards-concave mode, a plurality of fixing head nail sets are detachably installed on one side face of the head supporting ring in the circumferential direction of the head supporting ring and can abut against and make contact with the head of a patient to fix the head, and the head supporting ring is installed on the arc-shaped groove sliding way in a sliding mode. The head supporting ring and the arc-shaped groove slide way are locked through a locking screw, the rotation angle of the head supporting ring in the arc-shaped groove slide way can be adjusted by unscrewing the locking screw, and then the head position rotation angle of the head is adjusted. The supporting base and the head supporting ring are provided with a plurality of identification point positions. The head frame can provide fixation of different head positions required by an operation, is suitable for various different head neurosurgery operations, and can quickly recognize the change of the head position through an image.

This invention pertains to spinal pedicle screws, specifically locking spinal pedicle screws, including perforated pedicle screws and cortical bone screws that work with them. The proximal end of the self-locking master screw is thickened. A through-hole is provided in the thickened section of the pedicle screw, and the cortical bone screw is driven into the through-hole and fixed to the upper and lower cortical bone layers of the pedicle to form a triangular fixation. After the pedicle screw is implanted, both ends of the through-hole of the pedicle screw are located inside the pedicle. A hole is drilled from the posterolateral aspect of the pedicle using a special aiming device, passing forward and upward through the oblique hole of the pedicle screw, and then through the anterior and superior cortical bone of the pedicle. After measuring the length, a suitable cortical bone screw is selected, screwed in, and locked, fixing the posterolateral cortical bone, the pedicle screw, and the anterior and superior cortical bone of the pedicle. The screw is positioned in a safe area of ​​the superior cortical bone of the pedicle. The cortical bone screw is fixed to the upper and lower cortical bone of the pedicle by passing through the oblique hole, thus locking the position of the pedicle screw.

The utility model relates to a temporal muscle suturing and fixing device for neurosurgery, which is characterized in that at least one suturing line is connected onto a screw, and the other end of each suturing line is connected with a suturing needle. The device has the beneficial effects that the screw is directly fixed on the skull; the needle holder is provided with a suture needle to suture temporalis, and the suture needle is removed; the thread on one side of the screw and the thread on the other side of the temporalis can be knotted, fixation after the temporalis is cut open in a neurosurgery operation can be effectively completed, poor fixation of the temporalis is avoided, temporalis atrophy of a patient after an operation is avoided, psychological stress brought to the patient due to unattractive appearance caused by amyotrophy on one side after the operation is avoided, the design is simple and practical, and practicability is high. The device can be popularized to be used in various intracranial operations.