116 results about "Screw placement" patented technology

A vertebral cage is provided for use in preserving the space between adjacent vertebral during the process of spinal fusion. In particular, this cage has an open modified oval peripheral shape with a continuous fluid anterior wall having angled screw passages accessible through co-planar openings to allow the construct to be stabilized between adjacent vertebral bodies through their endwalls. In addition, the cage has a back to front wedge taper with pull-out resistant ratchet surfaces. Further, in a second aspect of the invention, the screw passages have a unique locking mechanism provided by oversized internal threads in combination with a second locking thread on the head of the associated bone screws that allows for axial translation of the screws within the screw passages. This in turn permits play in the angulation of the screw relative to the anchoring bone in order to optimize the screw placement in the bone.

A method of determining the size and/or placement of screws or other instruments in pedicles during surgery in a selected spinal area, comprising generating a dimensionally true three-dimensional image of the bony spine in the selected spinal area; hollowing out the vertebra in the three-dimensional image with cortical wall thicknesses selected by a surgeon performing the surgery; determining the narrowest cross section (isthmus) within each pedicle; generating a straight line starting at the center of the isthmus and extending inwardly to a point centered within the anterior cortex so that it is positioned concentrically within the pedicle without touching the walls thereof, the line terminating inside the vertebral body a predetermined distance from the anterior inner cortical wall and extending outwardly in the opposite direction to penetrate the posterior pedicle cortex; expanding the line concentrically and radially to a cross sectional size that is less than that of the isthmus, the line being expanded into a cylinder that stops growing when any portion thereof contacts the inner cortical wall of the hollowed out vertebral body, with the exception of the posterior pedicle cortex; and calculating the ideal pedicle screw or instrument diameter, length and/or trajectory based on the dimensions and trajectory of the cylinder generated for each pedicle. Also, a new and improved method for providing access to the interior of a pedicle for a desired transpedicular procedure, and a new and improved pedicle cannula construction are disclosed herein.

The invention discloses a 3D printing percutaneous vertebral pedicle guide plate, a preparation method of the 3D printing percutaneous vertebral pedicle guide plate, and a using method of the 3D printing percutaneous vertebral pedicle guide plate. The guide plate comprises a wavy panel which can be attached to the spine of a human body, the panel is provided with two hollow input sleeves used for pedicle screws to penetrate through, and a first layer sleeve, a second layer sleeve and a third layer sleeve are sequentially arranged inside each inlet sleeve from inside to outside. The preparation method of the 3D printing percutaneous vertebral pedicle guide plate comprises the steps of the building of a three-dimensional geometrical model, the determination of pedicle screw channels, the generation of the guide plate, 3D printing and sleeve installation. The 3D printing percutaneous vertebral pedicle guide plate is simple in structure and convenient to prepare. In the preparation process of the guide plate, machining is carried out on the designed guide plate in advance according to a body surface mark so that locking can be achieved for body surface positioning, it is guaranteed that the inlet sleeves and the pedicle screw channels are coaxially arranged, displacement is prevented, and it is guaranteed that the direction of puncturing and the direction of screw placement are accurate; through the guide plate, the placement depth is accurate, fluoroscopy does not need to be carried out repeatedly, surgical accuracy is improved, and surgical time is shortened.

Described herein is an anti-skid surgical instrument for use in preparing holes in bone tissue. The disclosed surgical instrument provides the ability to prepare a precise hole in bone tissue during surgery (e.g., spinal surgeries and pedicle screw placement, intramedullary screw placement). The disclosed surgical instrument accomplishes precise hole placement regardless of whether the angle between the drill axis and surface of the bone tissue is perpendicular. The disclosed technology includes a flat drilling surface which is perpendicular to the surface of the body of the surgical instrument. This reduces the likelihood of the surgical instrument skidding on the surface of the bone tissue and thereby increases the precision of the hole.

The invention provides a percutaneous minimally invasive pedicle screw/rod internal fixation system. The system comprises a pedicle screw, a longitudinal connecting rod, a locating needle tube, a guide needle, a dilating core, a placed screw guide sleeve, a screw loader, a rod holder, a distraction pressurizer, arm fracture devices and a screw loading base, wherein the locating needle tube and the guide needle are used for determining the position of a placed screw; the dilating core is used for dilating a screw placement channel; the arm fracture devices are used for fracturing long arms of the pedicle screw; the pedicle screw comprises a screw body, a screw base, two fracturable long arms and a plug screw; the screw body is connected with the screw base; the two fracturable long arms are oppositely and fixedly connected to the screw base to form a U-shaped structure in which the longitudinal connecting rod can be embedded; the two fracturable long arms extend out of the skin incision; and the plug screw is screwed in the U-shaped structure formed by the two fracturable long arms so as to compress the longitudinal connecting rod. By utilizing the system provided by the invention in the posterior thoracolumbar minimally invasive surgery, the trauma is little, and the haemorrhage is less; and the system is simple and flexible to operate and can achieve the effect of open surgery.

Described herein is an anti-skid surgical instrument for use in preparing holes in bone tissue. The disclosed surgical instrument provides the ability to prepare a precise hole in bone tissue during surgery (e.g., spinal surgeries and pedicle screw placement, intramedullary screw placement). The disclosed surgical instrument accomplishes precise hole placement regardless of whether the angle between the drill axis and surface of the bone tissue is perpendicular. The disclosed technology includes a flat drilling surface which is perpendicular to the surface of the body of the surgical instrument. This reduces the likelihood of the surgical instrument skidding on the surface of the bone tissue and thereby increases the precision of the hole.

The invention discloses a fixing device for surgical operations, which comprises a bottom plate. A chute is provided on the bottom plate. A clamping block is slidably connected in the chute. One end of the clamping block is screw-connected with a sliding rod, and the outer end of the sliding rod is threaded. There is a rotating rod, the side wall of one end of the rotating rod is screwed with a handle, the other end of the sliding rod is riveted with a first slider, the side wall of one end of the first slider is fixedly connected with a second connecting rod, and the other end of the second connecting rod The side wall is fixedly connected with a connecting shaft, the upper side wall of the fixed plate is riveted with a bracket, the other end of the bracket is screwed with a table board, the upper side wall of the table board is screwed with a push rod motor, and one end of the push rod motor is slidingly connected to the side wall There is a retractable rod, and the other end of the retractable rod is screwed with a placement block. The device can easily adjust the height of the device, and can also be used for different types of surgical operations, reducing the workload of medical staff.

The present invention relates to a simple pedicle screw placement navigator. The simple pedicle screw placement navigator comprises a guide sleeve, a guide tube, a guide pin, a transverse link rod, a right-angle swing rod, a lifting bar and a sliding block; the guide tube is fixed by the guide sleeve; the guide pin is positioned in the guide tube; one side of the guide sleeve is provided with a protractor, and the protractor can slide on the transverse link rod in an arc direction to achieve a specific abduction angle; the other end of the transverse link rod is slidably connected with a transverse main body of the right-angle swing rod and capable of achieving left and right translation; the tail end of a longitudinal main body of the right-angle swing rod is connected with a dial at an upper end of the lifting bar, and the longitudinal main body can rotate around the center of the dial to achieve head inclination or tail inclination with a specific angle; and a lower end of the lifting bar is connected with a sliding bar through the sliding block, so that the whole device can translate on the sliding bar. Compared with the prior art, the abduction angle and the head inclination or tail inclination angle of pedicle screw placement can be rapidly quantified after a screw entering point is determined, compared with a screw placement technology by hand, precision can be largely increased, and the expensive and time-consuming disadvantages of a large-scale navigation device are also overcome.

The invention provides a pedicle operation guide plate optimal screw placement path intelligent generation method. The method comprises the steps: S1, a two-dimensional CT scanning image for vertebrais acquired; S2, according to the two-dimensional CT scanning image, a closed three-dimensional network model for the vertebra is rebuilt in a three-dimensional mode, and a closed curved surface is formed; S3, a vertebra screw placement path set optimal model with the optimal length as a target is built; and S4, the set optimal model is solved by using a Lagrange multiplier method, and the optimalscrew placement path is acquired. According to the pedicle screw placement path generation method provided by the invention, the automatic optimal screw placement path generation problem is solved, and as for a given vertebra three-dimensional digital geometric model, based on the user requirements, on the premise of ensuring the operation safety, the longest screw placement path can be generatedautomatically.

The invention relates to the technical field of medical instruments, in particular to a tibiofibular syndesmosis reduction and screw placement guide device. The guide device comprises a base disc andan ankle neutral fixing assembly, an ankle joint horizontal marking rod assembly, a tibiofibular screw placement spacing and angle assembly and a tibiofibular syndesmosis pressurizing reduction assembly which are arranged on the base disc. By means of the tibiofibular syndesmosis reduction and screw placement guide device, tibiofibular screws can be placed reasonably with the placement position accuracy to 1mm and 1 degree, so that the tibiofibular screw placement accuracy is greatly improved, the surgical treatment effect is greatly improved, the occurrence of medical technical accidents is avoided, and the guide device is suitable for popularization and application in clinical medicine.

Devices, systems and methods for connecting surgical screws together, which can be utilized to attach surgical screws in a variety of configurations, such as where the screws and/or attached tulip head components are not parallel or where a significant amount of anatomical variation creates widely divergent screw placement. Also disclosed are low profile crosslink arrangements having a high degree of strength and capable of providing an extremely strong connection to various components of a surgical screw.

The invention relates to a tibial talocalcaneal joint fusion screw placement guider which comprises a screw placement guider, wherein the screw placement guider comprises a guide plate and a mounting support; the guide plate is an arc-shaped strip plate, the guide plate comprises a front guide section, a middle arc-shaped section and a rear guide section, a 90-degree angle is kept between the front guide section and the rear guide section, the two ends of the middle arc-shaped section respectively bend for 90 degrees and are connected with the front guide section and the rear guide section, and screw placement mounting holes distributed in one row are distributed at the middle part of a plate; and the mounting support is U-shaped, and two tail ends of the U-shaped mounting support are hinged with the two sides of the guide plate. The guider provided by the invention can carry out accurate positioning on the bone surface of calcaneus, the operation is convenient, the tibia, ankle bone and calcaneus can be accurately connected together, and thus the operation success rate is improved.

The invention belongs to the technical field of orthopedic surgery equipment, and relates to a first-accurate-type central axis minimally invasive mechanical navigation system for femoral neck surgery. The system comprises a femoral neck positioning hook connecting component, an adapter, a porous positioning guide plate, a positioning guider, a sliding rod right-angle adapter and a central axis positioning guide component, the femoral neck positioning hook connecting component is connected to the adapter through the vertical connecting rod, the porous positioning guide plate is arranged on theadapter, the sliding rod right-angle adapter is connected to the porous positioning guide plate and the positioning guider, and the central axis positioning guide component is arranged on the positioning guider. The system can be objectively, accurately and completely matched with the neck shaft angle, the front inclination angle and the front torsion angle, passes through the center of the femoral neck, guarantees the accuracy of the central axis of the femoral neck surgery, and achieves initial accurate screw placement with high accuracy. Meanwhile, a detachable structure is adopted, disinfection and repeated use after an operation are facilitated, the structure is simple, and functions are diversified.

The present invention discloses a screw placement box which comprises a support column, rotating members arranged on the support column, and placement boards which are connected to the rotating members and are provided with through holes for placing screws. The through holes are internally provided with elastic rings. The invention provides the screw placement box suitable for all models of screws, the end part of each column of placement boxes is labeled, a user can write models, the finding of a suitable screw is facilitated, the screws are placed and are perpendicular to a ground plane, thus the user can use an electric screwdriver to take the screws conveniently, multiple placement plates are arranged, and thus a small occupation space and a large placement quantity are realized.

The invention relates a system for implanting an implantable device in bone tissue, a processing unit for such system, a method of implanting an implantable device and a method of providing information for an implanting of an implantable device. In view of the finding that a fat content in cancellous bone is higher than a fat content in compact bone, the lipids fraction, which can be determined by optical means, e.g. spectroscopy, can be used to determine correct screw placement in healthy bone.