213 results about "Vertebral arch" patented technology

The invention discloses a pedicle screw path planning method. The pedicle screw path planning method comprises the steps of S1, performing image segmentation on a spine structure model to obtain a 3D voxel map of a target vertebral body and a pedicle; s2, determining an initial screw radial direction and an initial screw radius by combining the 3D voxel maps of the target vertebral body and the vertebral pedicle; s3, optimizing the initial screw radial direction and the initial screw radius in combination with the vertebral pedicle point cloud to obtain a screw radial parameter and a screw radius parameter; s4, calculating coordinates of a screw inlet point and a screw outlet point of the pedicle screw based on the radial parameters of the screw in combination with the centroid coordinates of the pedicle; and S5, simulating the swinging range of the universal nail head based on the coordinates of the nail outlet point to judge whether the nail rod penetrates through all the pedicle screws on the same side or not, if so, determining a planned path, and if not, iteratively executing the steps S3 to S5 until the nail rod penetrates through all the pedicle screws on the same side. According to the scheme, the problems of low efficiency and low success rate of pedicle screw placement and rod penetration operations are solved.

Pedicle-based intradiscal fixation devices, systems, instruments, and methods thereof. The implant or a portion thereof may be composed of a shape-memory material, which has a curved shape-memory orientation and a temporarily straight orientation. The implant may be configured to be inserted into a pedicle of an inferior vertebra, through the vertebral body of the inferior vertebra, and into the vertebral body of the superior vertebra to thereby stabilize the inferior and superior vertebrae.

The invention discloses a spine parameter measurement and spine automatic typing method comprising the following steps: obtaining four spine original images of a to-be-detected target in different directions, preprocessing the spine original images, and sending the preprocessed spine original images into an image neural network to obtain key information in the images; and performing parameter measurement and analysis according to the key information to obtain various parameters. And calculating according to the lateral bending Cobb angle, the segment and the sagittal posterior convex angle to obtain a lateral bending type. And judging the relative position relationship between the sacrum perpendicular bisector CSVL and the vertebral pedicle mask to obtain the corrected type of the lumbar curvature. And judging according to the thoracic vertebra posterior lobe of the sagittal plane to obtain a thoracic vertebra sagittal plane correction type. And combining the lateral bending type, the waist bending correction type parting and the thoracic vertebra sagittal plane correction type to obtain a complete Lenke parting. Through automatic identification and automatic calculation, the popularization rate of spine radiation parameter measurement can be effectively improved without professional requirements and thresholds, and the method has very high clinical practical significance and popularization significance.

The invention relates to the technical field of bone implants for minimally invasive surgery, and particularly discloses an implant for percutaneous minimally invasive thoracolumbar vertebral fracture, which comprises a vertebral body forming body, the vertebral body forming body comprises a vertebral body forming body head and a plurality of blade parts arranged at the rear end of the vertebral body forming body head in a surrounding manner, the vertebral body forming body head is provided with a needle guide hole penetrating along the axial direction, and the needle guide hole is communicated with the blade parts; a containing cavity is defined by the blade parts; the front end of the threaded guide rod and the head of the cone forming body are integrally formed, the needle guide hole penetrates through the threaded guide rod in the axial direction, and the rear end of the threaded guide rod extends out of the containing cavity; the pedicle screw is provided with a threaded hole penetrating in the axial direction, the threaded hole is in threaded connection with the threaded guide rod, the pedicle screw comprises a screw head and a threaded part arranged at the rear end of the screw head, and the screw head is arranged in the containing cavity and expands the blade part. According to the implant for the percutaneous minimally invasive thoracolumbar vertebral fracture, surgical wounds are reduced, the vertebral restoration effect is good, the stability of a vertebral formed body is guaranteed, and the surgical time can be saved.

The utility model discloses a 3D printing porous pedicle screw which comprises a screw body part and a screw cap part, the screw body part comprises a cortical bone thread area close to one end of the screw cap part and a cancellous bone thread area far away from one end of the screw cap part, and a porous structure area is arranged at one end, not connected with the screw cap part, of the screw body part. The porous structure area comprises an inner core column extending in the axial direction of the nail body part, at least one reinforcing beam and a porous structure, the reinforcing beams extend outwards from the periphery of the inner core column, and the porous structure is annularly distributed on the outer periphery of the inner core column. The porous structure can efficiently induce bone tissue to grow in, the screw and a vertebral body are connected into a whole, stress is effectively dispersed, the stability of the screw is improved, the porous structure is arranged on the vertebral body at the front end of the screw, screw breakage caused by stress concentration of the screw in a vertebral pedicle area can be avoided, meanwhile, the stability of the screw can be better improved through the reinforcing beam, and the service life of the screw is prolonged. The possibility of fracture of a porous area of the screw is reduced, generalization performance is better, and the use experience feeling is improved.

The invention discloses a screw feeding device which is suitable for a pedicle screw. The screw feeding device comprises an implanting mechanism and a torque applying mechanism which are in transmission connection with a pedicle screw; the torque applying mechanism is configured to be in an engaged state and a disengaged state with the implanting mechanism; when the torque applying mechanism and the implantation mechanism are in a joint state, the torque applying mechanism can transmit torque to the implantation mechanism; and when the torque applying mechanism and the implanting mechanism are in a separated state, the torque applying mechanism is separated from the implanting mechanism, so that the torque is prevented from acting on the implanting mechanism in the exiting process of the torque applying mechanism, and the pedicle screw is prevented from loosening. According to the vertebral pedicle screw, the operation time can be shortened, the operation steps can be simplified, the cooperation among instruments can be optimized, the complex operation of a surgeon on the cooperation of the instruments can be reduced, the vertebral pedicle screw cannot be loosened, and bone cement can be rapidly placed at the same time, so that the possibility of bone cement leakage and embolism can be reduced.

The invention provides a pedicle screw planning method and system, and the method comprises the steps: obtaining a CBCT image data set of a spine, carrying out the spine marking and pedicle screw marking of the CBCT image data set, and obtaining a data set containing a spine mask and a pedicle screw mask; inputting the data set containing the spine mask and the pedicle screw mask into a multi-task learning neural network for training, generating a first spine mask and a first pedicle screw mask, and extracting space coordinates of a starting point and an ending point of the first pedicle screw mask; according to the space coordinates of the starting point and the ending point of the first vertebral pedicle screw mask and the first spine mask, the space coordinates of the starting point and the ending point of the vertebral pedicle screw and the length of the vertebral pedicle screw are calculated, the generated spine mask can provide an accurate spine boundary, and intelligent planning of the position and the length of the vertebral pedicle screw is achieved. Generation of a spine mask and automatic planning of a pedicle screw are completed through a neural network.

According to some embodiments, a method of accessing an intervertebral space of a patient's spine in a minimally invasive manner compromises creating a passage from a posterior end of a pedicle of a vertebral member using a probe, advancing the probe through the pedicle and to a main body portion of the vertebral member, advancing the probe through a superior endplate of the vertebral member and into the intervertebral space and enlarging the passage using at least one tap to create an enlarged passage from a posterior of the pedicle to the intervertebral space. In some embodiments, the enlarged passage traverses at least three cortical layers of the vertebral member.

The utility model provides a pedicle screw imbedding guide plate which comprises a holding part and at least two supporting arms which are connected to one end of the holding part and used for abutting against a pedicle of a vertebral arch, and an avoiding position used for avoiding spinous processes is arranged between every two adjacent supporting arms. The side, adjacent to the avoiding position, of at least one supporting arm is provided with a positioning assembly used for placement of a pedicle screw, and the positioning assembly comprises a positioning structure and a positioning channel penetrating through the positioning structure and used for placement of the pedicle screw. According to the pedicle screw positioning device, a positioning channel is formed in the pedicle screw, it is ensured that the pedicle screw can enter the pedicle at the optimal angle through the positioning channel, an operator can directly conduct screw implantation along the positioning channel through fixing of the supporting arm, pedicle screw implantation precision and operation efficiency are improved, meanwhile, dependence on image navigation in the operation process is reduced, and the operation efficiency is improved. Therefore, the safety and the effect of scoliosis orthopedic surgery are improved.

The present invention relates to a pedicle screw including a nail body, a positioning part and a holding part, wherein the positioning part has a first side and a second side facing the first side, in which the nail body has an end disposed on the first side and the holding part is disposed on the second side. The holding part has left and right ends exhibiting a symmetrical arc shape. Thus, when the spinal fixation surgery is conducted, the holding parts of the two adjacent pedicle screws are stacked on each other, and the cross sectional area occupied by the holding parts on the skin surface is reduced, thereby significantly reducing the corresponding opening width, so that the requirement on minimizing the extent of the wound and minimizing the damage of the soft tissue at the surgical site is satisfied.

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.

The invention provides an X-ray-based scoliosis 3D intelligent automatic diagnosis system, which is characterized in that a spine area bounding frame coordinate, a hip bone bounding frame coordinate and a vertebral pedicle bounding frame coordinate are extracted from spine coronal image data, and the first 17 results are extracted to be matched with the number and spatial distribution of typical vertebral bodies of a human body; the method comprises the following steps: obtaining a spine region sub-graph, a hip bone region sub-graph and a vertebral pedicle region sub-graph, converting the sub-graphs into tensors to obtain a bounding box, four angular point coordinates and corresponding confidence of each vertebral body, storing the bounding box, the four angular point coordinates and the corresponding confidence as a structured record, performing Cobb angle calculation according to the structured record, and converting the structured record into an anatomical segment identifier; cutting is conducted according to the spine area, the hip bone area and the vertebral pedicle area subgraph, segmented vertebral pedicles and hip bones are obtained, the major curvature type, the pelvis height and the rotation direction are judged according to anatomical segment identifiers, and the patient age is determined according to the midpoints of the upper edges and the lower edges of the vertebral bodies, the arrangement angle of the adjacent vertebral bodies, spine major curvature core parameters and the age of the patient. And outputting a scoliosis 3D intelligent automatic diagnosis result.

A surgical system (100) for adjusting a segment of a spinal column comprises: a rack arm (29) extending in a longitudinal direction from a first end (29A) to a second end (29B); and a sliding body portion (30) including a ratchet mechanism (31) selectively engageable with the spline portion (29S) of the rack arm. The system may include a first actuator (32) for translating the sliding body along the rack arm in a longitudinal direction. The system may include first and second connecting towers (10) extending along first and second axes, respectively, the first and second axes each being transverse to the longitudinal direction. The system may also include a second actuator (40) including a threaded screw for adjusting the first attachment tower along the first axis. In some embodiments, the second actuator is configured to raise and lower the first connection tower in a sagittal plane.

Provided is an internal fixation instrument that is inserted from the pedicle of a vertebral arch into bone cement with which a vertebral body has been filled in advance, and that can be easily removed while maintaining the same level of internal fixation performance as that of a screw. The internal fixation instrument is inserted from the pedicle of a vertebral arch into bone cement with which a vertebral body has been filled, and is provided with a cylindrical shaft and a connection part that is disposed at the distal end of the shaft and that can be connected to a screwdriver, the shaft having a helical groove on the proximal side thereof. More preferably, the internal fixation instrument has a screw thread on the distal end side of the shaft, and the lead of the screw thread and the lead of the groove are set to be equal to each other.

The invention discloses a minimally invasive degradable reduction device for thoracolumbar vertebral fracture, and relates to the technical field of medical instruments. The mounting mechanism is mounted on the outer wall of the connecting rod in a sleeving manner; the pedicle screw is movably inserted into the middle of the top end of the mounting mechanism; an implantation mechanism; through cooperative work of the connecting rod, the mounting mechanism, the pedicle screw and the connecting mechanism, the whole reduction device adapts to minimally invasive approach modes such as percutaneous puncture and can be implanted into the body of a patient through a percutaneous puncture channel, a skin incision of the minimally invasive approach is small, damage to surrounding tissue is greatly reduced, and the reduction effect is good. Due to the layered design of the screw body in the pedicle screw, bone tissue ingrowth is promoted while the supporting strength is kept, and the reduction device is made of degradable materials, can be gradually degraded along with fracture healing after an operation and is metabolized and absorbed by an organism, and does not need to be taken out through a secondary operation, so that physical and mental pain of a patient is relieved; and the medical cost and the potential risk of the secondary operation are also reduced.

The present invention provides a fusion door fixation device and spinal internal fixation system, comprising a fixation plate body and an optional fusion plate; the fixation plate body comprises an upper fixation plate for fixing the upper lamina at the lamina door, a lamina door support plate for supporting, and a lower fixation plate for fixing the lower lamina at the lamina door, which are connected in sequence. The lower fixation plate is provided with a second fusion hole, in which a second fusion screw is provided. The second fusion screw passes through the vertebral body at the current level and is fixed to the vertebral body at the next level; the fusion plate is fixed to the vertebral body at the current level and is located on the opposite side of the lower fixation plate. The fusion plate is provided with a first fusion hole, in which a first fusion screw is provided. The first fusion screw passes through the vertebral body at the current level and is fixed to the vertebral body at the next level. The fusion screw is used to fix the lamina to the lamina at the next level, thereby achieving rigid fixation between the facet joints while maintaining stable support, providing favorable conditions for fusion between the vertebral bodies.

The invention discloses a percutaneous minimally invasive lumbar pedicle screw fixing system and a matched instrument. The percutaneous minimally invasive lumbar pedicle screw fixing system comprises a shell; the telescopic rod is fixedly connected with one side of the shell; the end, away from the shell, of the telescopic rod is fixedly connected with the handle. The opening mechanism is located in the shell; the strip-shaped plate is located outside the shell and connected with the opening mechanism; the detection positioning devices are located on the two sides of the strip-shaped plate; the distraction mechanism comprises a first groove, a motor push rod, a trapezoidal sliding block, a special-shaped sliding block, a second groove and a first motor, the distraction mechanism distraction a gap of a bone needing to be treated, the operation space of a medical worker in an operation is increased, the medical worker can better observe and treat diseased tissue, and the medical worker is more convenient to use. Wherein the distraction mechanism can flexibly adjust the distraction angle and distance, the stability of a vertebral body is maintained, the subsequent operation of an operation is facilitated, a detection lamp can display the condition of the operation in real time, medical workers are helped to rapidly position, operate and correct, and the operation efficiency is improved.

The utility model relates to the technical field of pedicle screws, and discloses a bone cement injectable hollow pedicle screw which comprises a screw cap, one end of the screw cap is connected with a wire drawing fixing bolt through internal threads, the other end of the screw cap is fixedly provided with a shaft seat, the interior of the shaft seat is connected with a hollow ball shaft, and the hollow ball shaft is connected with a screw rod. A screw body is connected to the outer wall of the end, away from the shaft seat, of the hollow ball shaft, a flow guide cavity is formed in the screw body, a mud outlet hole is formed in the outer wall of the screw body, and the mud outlet hole penetrates through the inner wall of the flow guide cavity; and the flow guide pipe is arranged in the flow guide cavity in a penetrating manner. The bone cement injectable hollow pedicle screw is provided with the flow guide pipe which is used for medical staff to inject bone cement into the flow guide cavity, so that the bone cement flows out of the mud outlet hole, farthest from the screw cap, of the screw body through the flow guide cavity and then flows out of the mud outlet hole in the near end, and the discharging sequence is more scientific and stable; and the situation that the screw body is not stably fixed due to non-uniform discharging of the bone cement is reduced.

The invention belongs to the technical field of medical instruments, and particularly relates to a transpedicular vertebral body bone grafting device which comprises a mounting assembly. Comprising a mounting frame, jackets arranged on the two sides of the bottom of the mounting frame, threaded sleeves arranged on one sides of the jackets, threaded rods arranged in inner cavities of the threaded sleeves, hand wheels arranged at one ends of the threaded rods, fixed clamping plates arranged at the other ends of the threaded rods and sliding grooves formed in the top of the mounting frame. An adjusting assembly, comprising a sliding seat which is arranged in an inner cavity of a sliding groove and slides left and right along the sliding groove, a fixing pin arranged on one side of the sliding seat, a connecting rod arranged on one side of the sliding seat, hinge frames arranged on one side of the connecting rod, a hinge shaft arranged between the hinge frames, a self-locking motor arranged on one side of the hinge frames, and a turnover seat arranged on the surface of the hinge shaft, wherein the output end of the self-locking motor is connected with the hinge shaft. The bone grafting device is reasonable in structure, convenient to adjust, assemble and disassemble in the using process, high in flexibility, high in safety and beneficial to improving the success rate of an operation, and meanwhile the position and the angle of the bone grafting device are convenient to adjust.

The present invention belongs to the field of osteotomy orthotics in orthopedics, and in particular relates to a computer-aided design of a personalized lumbar intervertebral fusion device and a design and manufacturing method thereof, which includes reconstructing a patient's lumbar vertebrae model, measuring the position parameters of the intervertebral fusion device to be implanted and the parameters of the vertebral body under the fusion device in the patient's lumbar vertebrae model; using modeling software, taking the normal vertebral body shape as a reference, and taking the measured intervertebral size parameters of the patient as a standard, designing the shape parameters of the intervertebral fusion device body; designing positioning wings on the fusion device body in combination with the size parameters of the vertebral body under the fusion device position; designing two nail holes on the intervertebral fusion device body and the positioning wings, respectively, and fixing the fusion device without notches; the main body adopts a mesh structure and a solid structure arranged in an alternating manner; and adopting 3D printing technology to manufacture the device. The present invention has the following beneficial effects: the lumbar intervertebral fusion device manufactured by the present invention has a moderate volume, and its position and fixing method are accurate and reliable, and the incision insertion of posterior pedicle screws is avoided, thereby realizing minimally invasive, precise, low-cost and short recovery time surgery.

The utility model discloses a pedicle puncture cannula and a pedicle puncture trocar, and belongs to the technical field of orthopedic navigation surgical instruments.The pedicle puncture cannula comprises a hollow cannula body, a handle is arranged at the upper end of the cannula body, a connecting shaft is arranged on the side face of the handle, and a reference frame is arranged at the tail end of the connecting shaft; at least three marking balls are arranged on the reference frame, and the tube body is detachably connected to the handle. Navigation and positioning are carried out through the marking balls on the reference frame, the number of times of X-ray fluoroscopy in an operation can be reduced, and the placement position and depth can be easily determined.

The present invention discloses a pedicle screw path planning method, comprising: step S1: performing image segmentation on a spinal structure model to obtain a 3D voxel map of the target vertebra and pedicle; step S2: determining an initial screw radial direction and an initial screw radius based on the 3D voxel map of the target vertebra and pedicle; step S3: optimizing the initial screw radial direction and the initial screw radius based on the pedicle point cloud to obtain screw radial parameters and screw radius parameters; step S4: calculating the entry point and exit point coordinates of the pedicle screw based on the screw radial parameters and the pedicle centroid coordinates; step S5: simulating the swing range of the universal screw head based on the exit point coordinates to determine whether the screw rod passes through all pedicle screws on the same side, and if so, determining a planned path, and if not, iteratively executing steps S3 to S5 until the screw rod passes through all pedicle screws on the same side. This solution solves the problems of low efficiency and low success rate in pedicle screw placement and rod insertion.

The utility model provides a pedicle screw implantation guider. The pedicle screw implantation guider comprises a fixed guide rod, a sliding guide rod and a moving assembly. A positioning piece is arranged at one end of the fixed guide rod and used for being in positioning fit with a screw tail of an implanted screw, and the length direction of the fixed guide rod is the same as that of the screw. The sliding guide rod is provided with a first sliding piece, the first sliding piece is matched with the fixed guide rod in a guiding mode, and the sliding guide rod is perpendicular to the fixed guide rod. Due to the structural design of the guider, no matter how the fixed guide rod moves, the movable guide rod is always parallel to the fixed guide rod. The bone structure of a patient is not changed before and during the operation, so that for the vertebral pedicle, the included angle of the vertebral pedicle on the two sides of the same section of vertebral body is not changed, the direction of the vertebral pedicle on one side is used as a reference to determine the direction of the vertebral pedicle on the other side, interference of the posture of the patient, operation anesthesia and other factors is avoided, and the accuracy of the screw placement direction is higher. Positioning is more accurate, and operation safety can be improved.

A device for augmenting a vertebra. The device includes an expandable implant and a pedicle anchor. The pedicle anchor includes at least one anchoring element movably coupled to an anchor body. An actuator is movable within the anchor body to deploy the anchoring element into engagement with a vertebral pedicle. The anchoring element may be deployed in a same plane as a tissue support ski of the expandable implant. The actuator may be a rod including a knuckle or a cam. The tissue support ski may be recessed from an outer profile of the device. Struts of the expandable implant may be angled towards the tissue support ski in an insertion configuration. The device may be oval-shaped and provide means for rotating the expandable implant relative to the pedicle anchor, and for blocking the expandable implant in a predetermined orientation. Methods of deploying the device are also disclosed.

A pedicle-lengthening implant may comprise an outer screw body configured to be inserted through a pedicle of a vertebra. The outer body has an upper portion and a lower portion. An inner bolt is disposed within the outer screw body, defining a longitudinal axis and configured to interact with each of the upper and the lower portions. Rotation of the inner bolt about the longitudinal axis causes the upper and lower portions of the outer screw body to separate axially along the longitudinal axis. The outer body may comprise external threads configured to engage bone of the pedicle. The inner bolt includes a threaded rod that engages first internal threads of the upper portion and internal threads of the lower portion at an inner bore of the outer screw body. The first internal threads of the upper portion and internal threads of the lower portion may have opposite thread directions.

A transpedicular spinal treatment system may include a transpedicular access port having an aperture positioned proximally to the distal end of the transpedicular access port. The transpedicular access port may be configured to enter a vertebra through the pedicle bone. A flexible member may be configured to translate along the lengthwise axis of the transpedicular access port. The aperture may allow the flexible member to extend from the aperture in a direction at least partially oblique to the lengthwise axis of the transpedicular access port. The flexible member may have an opening proximal to the distal end of the flexible member.

The present invention relates to a dynamic stabilization system for spine, the dynamic stabilization system comprises a joint head, a joint cavity, a connecting block, a connecting shaft, and a fixing nail; the joint head comprises a joint head head and a connecting rod, the joint head head is fixed at one end of the connecting rod; two connecting blocks are symmetrically arranged on both sides of the connecting rod and fixed by the fixing nail; the joint cavity comprises an acetabulum and a connecting rod, the acetabulum is fixed at one end of the connecting rod; the joint head head is installed in the acetabulum, and the joint head head can rotate a predetermined bending angle in the acetabulum; the connecting rod has a through groove, the connecting shaft is placed in the through groove, and is fixed by the fixing nail; the dynamic stabilization system is fixed to the corresponding vertebral body of the spine by a pedicle screw. The present invention can be applied to the dynamic stabilization of the spine in cervical, thoracic and lumbar surgeries, and can not only adapt to the changes of different spinal curvatures, but also reduce the stress concentration phenomenon.

The utility model relates to the technical field of medical instruments, in particular to a long-arm hollow pedicle screw which comprises a hollow implanting portion, a long-arm fixing portion and a long-arm fixing portion. The long-arm nail arm part is connected with the implanting part; the end, close to the implanting part, of the nail arm part is provided with a breaking groove perpendicular to the implanting direction of the implanting part. An annular pipe coaxial with the nail arm part is arranged on one end face, far away from the implanting part, of the nail arm part, and an annular groove is formed in the joint of the annular pipe and the nail arm part. The long-arm hollow pedicle screw not only has the function of lifting and resetting the vertebral body, but also has the effect of simplifying the broken screw arm.

A method and system for performing bone fusion and / or securing one or more bones, such as adjacent vertebra, are disclosed. The screws include a threaded tip connected to a main shaft and a threaded outer sleeve that rotates relative to the outer shaft until locked down. Independent rotation of the threaded outer sleeve relative to the threaded distal tip allows compression or distraction to modify the gap between the vertebral bodies. The screws are passed from the inferior to superior vertebra or superior to inferior, for example, through a trans-pedicular route to avoid neurological compromise. At the same time, the path of screw insertion is oriented to reach superior or inferior vertebra. An intervertebral cage of the system is configured for lateral expansion from a nearly straight configuration to form a large footprint in the disc space. The screws and cage may be combined for improved fixation with minimal invasiveness.

A device for augmenting a vertebra. The device includes an expandable implant and a pedicle anchor. The pedicle anchor includes at least one anchoring element movably coupled to an anchor body. An actuator is movable within the anchor body to deploy the anchoring element into engagement with a vertebral pedicle. The anchoring element may be deployed in a same plane as a tissue support ski of the expandable implant. The actuator may be a rod including a knuckle or a cam. The tissue support ski may be recessed from an outer profile of the device. Struts of the expandable implant may be angled towards the tissue support ski in an insertion configuration. The device may be oval-shaped and provide means for rotating the expandable implant relative to the pedicle anchor, and for blocking the expandable implant in a predetermined orientation. Methods of deploying the device are also disclosed.