408 results about "Vertebral pedicle" patented technology

Cephalad and caudal vertebral facet joint prostheses and methods of use are provided. The prostheses provide an artificial facet joint structure including an artificial articular configuration unlike the preexisting articular configuration. The radii and material stress values of the prostheses are configured to sustain contact stress. The cephalad prosthesis provides for posterior-anterior adjustment. Both prostheses permit lateral adjustment and adjustment to accomodate interpedicle distance. Further, the prostheses may be customized to provide a pre-defined lordotic angle and a pre-defined pedicle entry angle.

A prosthetic replacement for a posterior element of a vertebra comprising portions that replace the natural lamina and the four natural facets. The prosthetic replacement may also include portions that replace one or more of the natural spinous process and the two natural transverse processes. If desired, the prosthesis replacement may also replace the natural pedicles. A method for replacing a posterior element of a vertebra is also provided.

IntraOsteal UltraSound (IOUS) is the use of acoustical energy to facilitate “real-time” manipulation and navigation of a device for intraosseous placement of synthetic or biologic implants and to diagnose the condition of the tissue into which the implant is being placed. Representative applications include placement of synthetic or biologic implants, such as bone screws, through vertebral pedicles during spinal fusion surgery. Devices for use in the placement of the implants include a means for creating a lumen or channel into the bone at the desired site in combination with a probe for providing realtime feedback of differences in density of the tissue, typically differences in acoustical impedance between cancellous and cortical bone. The devices will also typically include means for monitoring the feedback such as a screen creating an image for the surgeon as he creates the channel, and / or an audible signal which different tissues are present. The system can also be used for diagnostic applications.

Cephalad and caudal vertebral facet joint prostheses and methods of use are provided. The prostheses provide an artificial facet joint structure including an artificial articular configuration unlike the preexisting articular configuration. The radii and material stress values of the prostheses are configured to sustain contact stress. The cephalad prosthesis provides for posterior-anterior adjustment. Both prostheses permit lateral adjustment and adjustment to accomodate interpedicle distance. Further, the prostheses may be customized to provide a pre-defined lordotic angle and a pre-defined pedicle entry angle.

Disclosed are apparatuses and methods for delivering implants through a posterior aspect of a vertebral body such as a pedicle and placing the implant or performing a procedure into the anterior aspect of the vertebral body. A representative apparatus includes an outer cannula, and advancer tube and a drill assembly. It is envisioned that at least one of the outer cannula, the advancer tube or the drill assembly can be viewed in vivo using for example, a CT scan or fluoroscope. The present invention is also directed to an apparatus for forming an arcuate channel in bone material. The apparatus includes and advancer tube and a drill assembly.

An endoscopic pedicle probe for use during spinal surgery to form a hole in a pedicle for reception of a pedicle screw has an enlarged proximal end for cooperation with the hand of the surgeon and an elongate shaft terminating in a distal tip that may be pushed through the pedicle to form the hole. An integrated endoscope and light extend through the shaft to enable the surgeon to visually observe the target area, and a conduit extends through the shaft to convey a fluid to irrigate the target area. In a preferred form the probe is connected with an electromyographic or mechanomyographic monitoring system to alert the surgeon when a breach is about to occur. In a further embodiment, two endoscopes are associated with the probe. The complete probe may be disposable, or just the tip may be detachable for disposal or replacement.

The invention relates to a method for fabricating a navigation templet used in pedicle positioning, including the following steps: firstly, collecting the original data and building up a three-dimensional vertebra model; wherein focusing on the location of a pedicle (1); then, conducting three-dimensional analysis to a screw entry passage of the pedicle and building up a virtual screw entry templet(3) which includes the screw entry passage(2); wherein the screw entry templet(3) is a reverse navigation templet which matches with the outline of the rear part of a vertebral lamina; and then, fabricating the reverse navigation templet through quick molding technique. The increases of CT or MRI scanning velocity and precision provide a precise sectional image for acquiring a three-dimensional model in reverse engineering, and the necessary organs can be quickly reconstructed through a three-dimensional reconstruction software and can be transformed and bored freely on the virtual model so as to figure out an optimal pedicle screw entry route. On the basis of the virtual model, the pedicle screw entry direction and depth can be guided by using the reverse navigation templet fabricated through quick molding technique during an operation so as to quickly and accurately finish the operation.

A surgical angulation measurement instrument of the instant invention includes a positioning measurer and a positioning reader linked to the positioning measurer. The positioning measurer detachably couples with a tool which is used to implant the pedicle screw. In response to the orientation of the tool, the orientation of the pedicle screw is measured by the positioning measurer with respect to a pedicle axis of screw placement. The positioning reader indicates the orientation of the pedicle screw and notifies the orientation of the pedicle screw being aligned with the pedicle axis of screw placement.

The invention provides a fixing and navigating surgery system in a vertebral pedicle based on a structure light image. The system comprises a structure light scanner, an infrared navigating and positioning apparatus, a dynamic standard, a surgery apparatus with a plurality of infrared luminous diodes and a computer, wherein the structure light scanner and the infrared navigating and positioning apparatus are arranged in a positioning way; the surgery apparatus is provided with the plurality of infrared luminous diodes, and the infrared light transmitted from the diodes are captured by the infrared navigating and positioning apparatus to define the relationship between the navigation coordinate system of the infrared navigating and positioning apparatus and the surgery apparatus coordinate system of the surgery apparatus; and the dynamic standard which is clamped on the patient vertebra is also provided with a plurality of infrared luminous diodes for instantly tracking the change of a patient coordinate system to the navigation coordinate system. The invention replaces doctor manual pointing with the structure light image scanning, reduces the manual operation error, and reduces the injure of the X ray to the doctor and the patient; and the dynamic standard also has the characteristics of small volume and good function, can improve the reliability of the surgery and the precision of the nail implantation, and reduces surgical wounds.

The invention discloses a navigation template capable of being used for positioning vertebral pedicle. A manufacture method of the navigation template comprises the following steps of: firstly, acquiring original data and establishing a three-dimensional vertebra model on a computer; secondly, carrying out three-dimensional analysis on a vertebral pedicle needle-entering channel, extracting an outline of the rear part of a vertebral plate, establishing a virtual reverse template coincide to the outline at the rear part of the vertebral plate in a system; thirdly, fitting the virtual reverse template with the vertebral pedicle needle-entering channel, establishing a virtual needle-entering template; and fourthly, manufacturing the needle-entering template by using a quick forming technology, wherein the needle-entering template is a reverse navigation template coincide to the outline of the rear part of the vertebral plate. The invention organically integrates a digital technology, reverse engineering and the quick forming technology, thereby achieving the purpose of rapidly, cheaply and efficiently accurately positioning the vertebral pedicle.

A vertebral pedicle screw includes a screw body driven into a vertebral pedicle, a housing assembled to an upperend of the screw body and having grooves for seating a rod and a threaded portion for locking a fastening bolt, the fastening bolt pressing the rod positioned thereunder as it is threaded downward, and a fastening ring inserted into the housing. The vertebral pedicle screw further includes an insert placed on an outer surface of a screw head of the screw body in the housing, installed to be partially come into contact with the fastening ring on an upper portion thereof, and accommodating the screw head ofthe screw body on a curved inner surface thereof such that the insert and the screw head are brought into sliding contact with each other, whereby an entire rod-side assembly can be slidingly moved in all directions with respect to the screw body.

A system and minimally invasive method for the placement of pedicle screws without the use of a trocar needle and / or guidewires. The system and method comprises at least one pedicle finder and at least one dilator. The pedicle finder preferably comprises an extender that is removably attached to a pedicle anchor. Attached to a pedicle anchor is a flexible tether. The extender preferably includes a passage through which the flexible tether extends. The dilator comprises a tubular body with two ends, where a first end comprises a means for securing the dilator into bony process of vertebra and a second end comprises at least two arm attachments. The tubular body Of the dilator is configured to slide easily over an extender and secure the first end into bony vertebra to prevent the dilator from dislodging. The arm attachment of the second end of the dilator can be interconnected with another arm attachment via a linking element and / or the dilator can be secured to a stable object such as a table via a securing element.

The invention relates to the field of medicine, in particular to a spine pedicle screw implanting and locating device. The spine pedicle screw implanting and locating device comprises hardware of a C-shaped arm, an image correction calibration plate, an image collection module, a locating robot, a path locating frame, a position tracking platform, a computer and the like, a spine pedicle screw implanting path planning module and a locating navigation module based on an X ray picture during an operation, wherein the spine pedicle screw implanting path planning module and the locating navigation module are stored in the computer. Through the spine pedicle screw implanting and locating device, according to the anatomical structure characteristics of a spine vertebral body, a coordinate system is established, an operation path planned in a 3D environment before the operation, an operation path planned in a 2D environment during the operation and an operation apparatus path during the operation are expressed, and by the use of the relationship of the three paths, a doctor is guided or a robot is controlled to complete precise operation path locating operation. The spine pedicle screw implanting and locating device can track the position relationships among all objects on a 2D image in real time, reflect the relationship between a tool and pedicle of vertebral arch actually, precisely and timely, eliminate errors of the traditional computer navigation system in an operation process, reduce the operation difficulty, and improve the operation efficacy.

A transfacet-pedicle locking screw fixation assembly includes a plurality of pedicle screws each including threads at a distal end and a connecting receptacle at a proximal end. The connecting receptacle is oriented perpendicularly with respect to a longitudinal axis of the pedicle screw. A basic transfacet locking screw including threads at least at a distal end has the distal end engaging the connecting receptacle in one of the pedicle screws. The transfacet locking screw may also be interlocked with another transfacet locking screw.

A pedicle access system including a cannula, a stylet, and a removable T-handle. The pedicle access system may be used to percutaneously approach the pedicle, initiate pilot hole formation, and conduct a stimulation signal to the target site for the purposes of performing a pedicle integrity assessment during the pilot hole formation. To do this, the cannula and stylet are locked in combination and inserted through an operating corridor to the pedicle target site, using the T-handle to facilitate easy movement and positioning of the cannula / stylet combination. A stimulation signal may be applied during pilot hole formation to conduct the pedicle integrity assessment. In a significant aspect, the T-handle may be detached from the cannula / stylet combination to facilitate the use of various surgical tools as necessary.

The invention relates to an individuation minimal invasive vertebral pedicle screw entering navigation template and a preparation method of the navigation template. The preparation method of the navigation template includes: reconstituting a three-dimensional model of a target vertebra based on a medical image; conducting the screw entering porous channel virtual analysis design on the three-dimensional model and defining a screw entering porous channel; taking feature points from the three-dimensional model, designing a vertebral pedicle screw entering navigation template prototype and obtaining a navigation template which fully fits for the vertebral body through the Boolean calculation; and manufacturing the navigation template through 3D printing and other processing methods. The individuation minimal invasive vertebral pedicle screw entering navigation template closely fits for the mastoid process and the lamina arcus vertebrae, is high in stability, ensures accurate implanting of the vertebral pedicle screw, avoids direct contact with the spinous process, reduces peeling of the muscle ligament, realizes minimal invasion, is applicable to various situations such as the vertebral distortion and slipping and the rupture of the vertebral pedicle, prevents slipping and distortion during screw entering due to the arrangement of a finger pressing board, and is convenient to operate and low in the requirement for doctors, degreases the operation risk, improves the operation efficiency and reduces the operation cost further.

IntraOsteal UltraSound (IOUS) is the use of acoustical energy to facilitate “real-time” manipulation and navigation of a device for intraosseous placement of synthetic or biologic implants and to diagnose the condition of the tissue into which the implant is being placed. Representative applications include placement of synthetic or biologic implants, such as bone screws, through vertebral pedicles during spinal fusion surgery. Devices for use in the placement of the implants include a means for creating a lumen or channel into the bone at the desired site in combination with a probe for providing realtime feedback of differences in density of the tissue, typically differences in acoustical impedence between cancellous and cortical bone. The devices will also typically include means for monitoring the feedback such as a screen creating an image for the surgeon as he creates the channel, and / or an audible signal which different tissues are present. The system can also be used for diagnostic applications.

A method of replacing a nucleus pulposus in an intervertebral disc by filling the disc with a flowable augmentation material through a throughbore in a pedicle.

The invention discloses a method for utilizing three-dimensional modeling for looking for an optimum inserting point for inserting a pedicle screw. The method comprises the steps that firstly, an optimum channel plane for inserting the pedicle screw is determined, then an optimum safety channel for inserting the pedicle screw is determined, and finally the optimum inserting point for inserting the pedicle screw is determined. The inserting point is located through the method, a patient does not need to be in contact with X-rays, trauma is reduced, operation time is saved, and no matter whether the vertebral pedicle and the zygopophysis of the centrum of the patient are varied or varied to a certain degree, the accuracy and success rate of inserting the pedicle screw at one time are high.

A nucleus replacement mimics a native annulus in shape and function for use in partial disc arthroplasty. The nucleus replacement includes a jacket having a compartment, a first anchoring limb on one side of the compartment, and a second anchoring limb on an opposite side of the compartment. The jacket is insertable into a disc space through an operating channel in at least one of the vertebral pedicle and the vertebral body. A shock absorbing material is injectable into the compartment after installing the jacket into the disc space. The shock absorbing material has characteristics that absorb loads on the replacement.

The invention discloses a three-dimensional positioning and guiding device for penetrating a vertebral pedicle through skin. The three-dimensional positioning and guiding device for penetrating the vertebral pedicle through the skin comprises a base, dip angle measuring devices and a measuring device supporting rod, wherein guiding grooves are arranged in length wise frame edges of the base, two dip angle measuring devices are matched on the measuring device supporting rod in a sliding mode, and an arc-shaped guiding groove is arranged in each dip angle measuring device. A bar-shaped hole is arranged in the measuring device supporting rod, a puncture needle guiding tube is in hinge joint with the dip angle measuring devices, and the puncture needle guiding tube penetrates through the bar-shaped hole. A guiding pin is arranged on the puncture needle guiding tube and is matched with the arc-shaped guiding grooves, marking needle fixing holes are arranged in the middle portion of the measuring device supporting rod, and two ends of the measuring device supporting rod are cylindrical segments. The measuring device supporting rod is matched with the guiding grooves in a sliding mode through sliding blocks, the cylindrical segments of the measuring device supporting rod extend out of the sliding blocks and are connected with a positioning rod, and the positioning rod is in the same plane with the measuring device supporting rod and the puncture needle guiding tube. The three-dimensional positioning and guiding device for penetrating the vertebral pedicle through the skin is capable of three-dimensional positioning and guiding and shortening the operation time, high in efficiency, accurate in guiding and capable of improving the achievement ratio of operation.

A Posterior Dynamic Stabilization (PDS) device that regulates physiologic spinal elongation and compression. Regulation of elongation and compression are critical requirements of Posterior Dynamic Stabilization devices. Elongation and compression of the device allow the pedicles to travel naturally as the spine flexes and extends. This interpedicular travel preserves a more natural center of rotation unlike some conventional PDS devices that simply allow bending. The device incorporates two components: 1) a spring that allows elongation / compression, and 2) a polymer core component that serves to increase the stiffness of the device in shear, bending, and tension, and also prevents soft tissue ingrowth.

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.

The invention relates to a production method for a guide template. The production method comprises the following steps of: at first, importing CT (computed tomography) serial sectional image data into three-dimensional rebuilding software such as Mimics 10.01 for three-dimensional model rebuilding by CT scanning; then, designing a guide plate with vertebral pedicle positioning guide holes in the two sides of a single vertebral body on a digital lumbar vertebra anatomical model subjected to three-dimensional rebuilding; and finally, producing the template by a laser irradiation layer-by-layer curing and forming technology. The guide template produced by the method can be satisfactorily and closely combined with the vertebral body, can be used for accurately positioning and orienting vertebral pedicle, and guarantees the correct implantation position and direction of vertebral pedicle screws.

The invention discloses a three-dimensional adjustable combined guiding system for assisting in implanting screws into the vertebral pedicle, and belongs to the field of medical instruments. The purpose is to solve the problem that when the screws are implanted in a spine surgery operation, accurate guiding can not be achieved if only depending on experience estimation and manual operation. The guiding system comprises a sliding rail, spinous process fixing clamps, a drilling angle adjustor, retractable abduction frames and vertebral pedicle screw guiding tubes. A designing conception and a using method are characterized in that a, before an operation, the optimal needle inserting angle is accurately measured according to imageological examination; b, according to the result, the drilling angle adjustor is adjusted to lock the angle so that the unique accurate screw implanting angle of three-dimensional space can be determined; c, the drilling angle adjustor moves along the sliding rail, and the length of the retractable abduction frame is adjusted and locked to control the distance between a screw-entering point and the central axis of the spinous process so that the guiding tubes can be tightly attached to the needle-entering point; d, screw implanting operation is performed inside the guiding tubes. The guiding system can be adjusted and combined. Experience estimation of implanting the screws into the vertebral pedicle is changed into quantified measurement, screw implanting safety and accuracy are high, and operability is high.

A boring instrument guiding device which is used to guide a boring instrument that forms a pilot hole for embedding a pedicle screw in a vertebral pedicle includes a reference pin 3 which is used as a reference by being inserted into the vertebral arch from the rear to the front of a spine, and an arm 4 which extends sideward from the proximal end side of the reference pin 3, and is characterized in that a plurality of guide holes 12, each of which is opened toward the tip position 3a of the reference pin 3 to guide the boring instrument 2, are formed in the arm 4 in a radial pattern centered at the tip position 3a of the reference pin 3. It is possible to provide a boring instrument guiding device which is capable of more easily and precisely guiding the boring instrument.

The invention relates to a personalized lumber internal fixation auxiliary device and a manufacturing method thereof. The personalized lumber internal fixation auxiliary device comprises two guide holes, two sleeve pipes and a connector, wherein the sleeve pipes are positioned in the guide holes, and the connector is connected with the guide holes on two sides. The manufacturing method comprises the following steps of: firstly, acquiring lumbar three-dimensional parameters through CT (computed tomography) scanning; secondly, designing a guide plate containing positioning guide holes for vertebral pedicles on two sides of a single vertebral body on a three-dimensionally reconstructed lumbar digital anatomical model; and finally, producing a template through a laser radiation layer-by-layer solidification forming technology. The personalized lumber internal fixation auxiliary device is used for accurate implantation of pedicle screws.

A pedicle screw may include an electrically conductive portion formed from a material having a greater electrical conductivity than that of the base material from which the screw is formed. The electrically conductive portion preferentially channels electrical energy supplied by an electrical probe to a location of the electrically conductive portion facing the nerve root. The portion thus provides a sort of electrical highway that helps to focus the electrical energy applied to the pedicle screw in a particular direction, towards the presumed location of the nerve root. As an alternative to placement of the electrically conductive portion in the pedicle screw itself, the electrically conductive portion could be placed within a tap that is used in preparing the pedicle for receipt of the pedicle screw (e.g., in forming the threaded structure in the pedicle bone into which the pedicle screw will then be placed).

The invention discloses a double-balloon dilator for a bone surgery, which belongs to the technical field of medical apparatuses. The double-balloon dilator for the bone surgery is mainly characterized by comprising a pressurizing injection device, a developer syringe and a dilating balloon, wherein the pressurizing injection device is communicated with an inner cavity of the dilating balloon by a conduit; the developer syringe is arranged on the conduit between the pressurizing injection device and the dilating balloon; the dilating balloon comprises a main balloon and an auxiliary balloon; the auxiliary balloon is arranged at the side of the main balloon; the conduit comprises a main conduit and an auxiliary conduit; one ends of the main conduit and the auxiliary conduit are respectively communicated with the main balloon and the auxiliary balloon, and the other ends of the main conduit and the auxiliary conduit are respectively connected with the pressurizing injection device; a hydraulic flow dividing valve is connected to a pipeline among the main conduit, the auxiliary conduit and the pressurizing injection device; and the developer syringe is respectively communicated with the main conduit and the auxiliary conduit by the flow dividing valve. The invention aims to provide the double-balloon dilator for the bone surgery, which can be used for single-side vertebral pedicle puncture so as to achieve the bone cement filling effect with same double-side puncture and is used for treating osteoporotic vertebral compression fracture.

The invention relates to the field of medicine, in particular to a spinal pedicle screw operation path planning method based on deep learning. The method comprises the following steps: expressing a spinal pedicle screw operation path as a linear operation path, and defining an operation entry point and an operation direction point; establishing an operation path planning data set comprising a spine segmentation data set and an operation path key point data set; designing a spine segmentation network in a mode of jointly supervising the network by adopting an encoder-decoder structure for fivetimes of down-sampling, Dice loss and softmax loss; combining a convolution network and a full connection network, and in a manner that L1 loss and mean square error loss jointly supervise the network, designing a surgical path point positioning network; and automatically segmenting the spinal CT image by adopting the trained network, automatically positioning the key points of the operation path,reconstructing the operation path through the key points, and evaluating the planning of the operation path by adopting two modes of subjective evaluation and objective evaluation. According to the method, the screw entering path of the spinal pedicle screw operation can be automatically planned.