Abstract: A surgical stapling instrument includes an anvil assembly, a shell assembly, and an adapter assembly. The adapter assembly includes a tubular shaft supporting the shell assembly at a distal portion of the tubular shaft, and a trocar assembly transitionable between an extended configuration and a retracted configuration. The trocar assembly includes a trocar detachably supporting the anvil assembly thereon, a lead screw adapted to be coupled to an actuator for rotational input, a first member rotatably supporting the lead screw, a second member operatively coupled to the lead screw such that rotation of the lead screw causes axial displacement of the second member relative to the first member, and a light diffuser configured to scatter light received from a light source. The light diffuser is configured to be surrounded by the anvil center rod when the anvil center rod is attached to the trocar.

Abstract: A reload assembly includes a shell housing, a staple cartridge, a staple actuator, and a knife carrier. In embodiments, the knife carrier or the shell housing defines a locking groove and the other of the knife carrier and the shell housing supports a locking member. In other embodiments, the knife carrier or the staple actuator defines a locking groove and the other of the knife carrier and the staple actuator supports a locking member. The locking member is received within and movable through the locking groove to prevent readvancement of the knife carrier after the reload assembly is fired.

Abstract: An implant can include a frame and a mesh component coupled to the frame. The mesh component can define a first porosity, and the frame can define a frame porosity. The combined porosity of the mesh component and the frame can restrict blood flow into the implant.

Abstract: This invention is an intrasacular aneurysm occlusion device with a proximal stent which is expanded to a globular shape within an aneurysm sac and then compressed into a bowl shape which covers the aneurysm neck. The device further comprises embolic members and/or embolic material which is inserted into a distal portion of the aneurysm sac. The proximal stent component covers the aneurysm neck so as to reduce blood flow into the aneurysm sac and the accumulated embolic members and/or embolic material in the distal portion of the aneurysm sac keeps the proximal stent in place.

Abstract: Left atrial appendage (LAA) occlusion device including a membrane, a plurality of fixation splines and a deployment hub, the plurality of fixation splines for affixing the LAA occlusion device to an ostium of the LAA, the deployment hub being positioned in the membrane, the deployment hub including a threaded aperture and a one-way valve, for enabling a toxin to be entered into the LAA through the deployment hub.

Abstract: A system for delivering an implant within a patient is disclosed. The activation of the heater coil causes the degradation, melting or reduction of a component that brings the heater coil into or out of electrical contact with another component, or causes the individual loops of the coil to contact each other, thereby resulting a notable change in resistance in the circuit supplying the heater coil with electricity. A core wire terminates prior to the distal end of the device, allowing for greater flexibility.

Abstract: An implant for use in orthognathic surgery of a mandible may include a longitudinal plate member and a plurality of pre-configured guides coupled to the plate member. The longitudinal plate member is pre-bent to correspond to the post-operative shape of the mandible; and the guides are pre-configured to align the plate member with the mandible when the implant is positioned against the mandible after the mandible has been separated.

Abstract: A portable and passive safety intraosseous device to allow for direct introduction of medications, etc., within the intermedullary space of a subject patient's bone or, if needed, the removal of certain substances from such a subject patient's bone. Such a device permits direct drilling and placement of a cannula within the subject bone with access external to the subject patient's skin, permitting, as well, connection of a tube for such introduction/removal purposes. The ability to provide a passive safety unit allows for facilitated utilization in, for instance, emergency situations with the entire device provided for utilization thereof. The device includes a drilling component with a permanently attached stylet and a removable cannula, a power supply for a single drilling operation, a mechanism to draw the stylet back into the drill component after use and disengagement from the cannula, and an automatic closure that activates with the separation of the cannula.

Abstract: Surgical tools for removal of tissue, namely instruments, devices and methods for surgical tissue cutting with a cylindrical cutting burr bit extending from an elongated hollow member and connected to a shaft for actuating rotation motion of said burr bit to cut/remove tissue from a target location, while mitigating the harm of damaging surrounding tissue.

Abstract: Methods and devices for consistently and accurately controlling the depth of the graft tunnel. A sheath is inserted into the bone until a stop member on the sheath contacts the bone. A cutting member is then deployed to drill a larger bore in the tunnel until making contact with the distal end of the sheath. The cutting member may be drawn retrograde within the tunnel, or driven antegrade from an opening opposite the opening in which the sheath resides. The drill and the sheath can then be removed, leaving the tunnel that includes a tunnel portion sized to fit a graft so that the graft fits tightly within the tunnel portion and is flush with the opening of the tunnel.

Abstract: A distal femoral joint replacement system includes a femoral component having condylar articular surfaces, a stem extending from the femoral component, and a void filler for filling a bone void within a femur. The void filler includes a body and a plurality of legs extending from the body. The body has a sidewall defining an opening for receipt of the stem which extends along a length of the body and extends through the sidewall so as to form a side-slot in the sidewall that extends along an entire length of the sidewall. The plurality of legs each have a first end connected to the body and a second end remote from the body. The legs each have an outer surface that tapers between the first and second ends and is configured to register with a corresponding inner surface of a bone void when implanted in an end of the femur.

Abstract: A cutting guide for periacetabular osteotomy comprises at least one first main body having a longitudinal opening for the insertion of a cutting instrument, extending from a first end to a second end of the first main body and at least two positioning and fixing arms extending away from the first main body from opposite sides with respect to the longitudinal opening, in order to correctly position the first main body on a bone and fix it thereto through respective fastening members.

Abstract: The invention relates to a bone positioning device (1) for use in the repositioning of bone sections relative to each other in case of dysgnathia, comprising a main body (2), which has a bottom side (3), which faces the lower jaw (7) and in which there are recesses (5) for receiving navigating aids (6) fixed to the lower jaw, and an opposite top side (4), which faces the upper jaw and in which there are likewise recesses (5) for receiving navigating aids (6) fixed to the upper jaw, wherein at least one cutting-tool guide device (8) is attached to the main body (2).

Abstract: A drill guide arm for providing guidance for placement of a bone tunnel, while protecting against trauma. The guide arm includes a first arm at a proximal end connected at an angle to a second arm, the second arm extending to a distal end. The angle can be within the range of 80°-110°. The second arm extends along a first axis. The guide arm also includes a distal tip extending at a second angle from the second arm at the distal end, and an indicator feature extending from the distal tip toward the first arm. The indicator feature extends along a second axis, the second axis being substantially parallel to the first axis. The guide arm can also include a shield feature of the distal tip. The shield feature has a width wider than the remainder of the distal tip.

Abstract: A surgical instrument system for positioning a guide pin about a glenoid cavity that includes an anterior retractor. The anterior retractor includes a tip structured to engage a scapula, a lateral retractor shaft extending from the tip, and a medial retractor shaft extending substantially transverse from the lateral retractor shaft. The system further includes an alignment guide attachable to the anterior retractor, the alignment guide including an alignment guide shaft, a guide about a distal end of the alignment guide shaft, and a fastener for connecting the alignment guide shaft to the anterior retractor such that a longitudinal axis of the alignment guide shaft is aligned with a longitudinal axis of the medial retractor shaft when fastened thereto.

Abstract: A device for the fragmentation of a calculus includes a probe, and a drive unit for deflecting the probe along the longitudinal extension thereof. The drive unit includes a first drive element for periodically deflecting the probe and a second drive element for the pulsed deflection of the probe. The drive unit is configured such that periodic deflection and pulsed deflection can be superimposed.

Abstract: The tissue retrieval system deploys a tissue bag at the surgical site. The bag is supported by the system as tissue is placed within the bag and is closed to isolate the collected tissue and allow the bag and collected tissue to be removed from the body. The bag can be reopened and re-closed as desired through use of a guide bead and cord. The bead also facilitates removal of the collected tissue.

Abstract: Described here are devices, systems, and methods for providing remote traction to tissue. Generally, the systems may include a grasper and a delivery device configured to releasably couple to the grasper. The grasper may have a first jaw and a second jaw and a main body having a barrel portion. The barrel portion may have a lumen extending therethrough, and a portion of the delivery device may be advanced through the lumen to rotate one or both of the jaws. The delivery devices may include a handle, a shaft, and a distal engagement portion. The delivery devices may further include an actuation rod which may be advanced through a barrel portion of a grasper to actuate the grasper. In some instances, the delivery device may further include a locking sheath, wherein the locking sheath is configured to temporarily couple to a grasper.

Abstract: A medical instrument includes a snake wrist structure further including: a first joint disk having a first rim having a first tooth slot and a first toothed gear with the first tooth slot opposite the first toothed gear along the first rim; and a first strut having a first slot bearing and a first hole bearing connected by a first connection strut with the first slot bearing in the first tooth slot.

Abstract: A surgical instrument for minimally invasive surgery has an instrument shaft with a distal end and a proximal end. The proximal end is connectable to a signal generator. The surgical instrument has an instrument head which is pivotably connected to the distal end of the instrument shaft via a joint, and an end effector which is mounted rotatably about its longitudinal axis in the instrument head. The instrument further comprises a mechanical coupling element which is arranged at least partially in the instrument shaft and is configured to transmit and/or convert mechanical actuating signals of the signal generator for pivoting and rotating the instrument head, as well as a coil spring which bypasses the joint and connects the end effector to the coupling element to rotate the end effector. The coil spring has portions with different spring constants.

Abstract: A surgical instrument apparatus for removably receiving an end effector coupled to an elongate control link for actuating the end effector to perform surgical operations is disclosed. The apparatus includes an actuator housing and an elongate shaft extending from the actuator housing and having a bore for receiving the control link. The apparatus also includes an actuator mounted within the actuator housing and includes a clamp aperture disposed to receive the control link while the clamp aperture is being urged into an unclamped state by an opening force, the clamp aperture being operably configured to move between the unclamped state and a clamped state in response to the opening force being released, the aperture in the clamped state being operable to restrain the control link within the actuator for movement in a longitudinal direction substantially aligned with the elongate shaft.

Abstract: A surgical tool that has a pair of transmissions coupled to one another to effect driving of a cutting tool in both an oscillating manner and a reciprocating manner. The transmissions are driven by a motor coupled to one of the transmissions.

Abstract: Systems and methods are configured to treat a tissue by automatically linearly oscillating an instrument into a target site. A system may include a body having a length and configured to receive a portion of the instrument guide member having an exposed end and/or an instrument. The system may further include an actuator member disposed within the body and configured to linearly oscillate the instrument within the instrument guide member a fixed distance past the exposed end. The systems and methods can increase patient comfort while empowering clinicians by simplifying interventions for musculoskeletal disorders.

Abstract: An embodiment includes an apparatus for carpel tunnel syndrome surgery. The apparatus comprises: a shaft including a shaft proximal end, a shaft distal end, and a shaft long axis, wherein the shaft distal end comprises a raised edge; a linkage included within the shaft; a blade coupled to a distal end of the linkage; wherein (a)(i) an axis parallel to the shaft long axis intersects the raised edge but does not intersect the shaft, (a)(ii) the raised edge is curvilinear, (a)(iii) the raised edge includes a first lateral edge portion, a second lateral edge portion, and a middle edge portion between the first and second lateral edge portions; and (a)(iv) the first and second lateral edge portions are both proximal to the middle edge portion. Other embodiments are described herein.

Abstract: An ultrasonic instrument includes a shaft assembly and an end effector having an ultrasonic blade, a clamp arm, and a clamp pad. The clamp arm is pivotally coupled with the shaft assembly. The clamp pad is configured to removably couple with the clamp arm while the clamp arm is pivotally coupled to the shaft assembly. The clamp arm includes a mortise and a pair of support gussets. The clamp pad includes a tenon and a pair of resilient projections where the tenon engages the mortise of the clamp arm and the projections contact the support gussets of the clamp arm.

Abstract: An intravascular device is provided having a catheter tube and an expandable portion including a plurality of struts capable of being moved between an open and a closed position. An incising element and an abrasive surface are provided on at least one of the struts. The incising element has a sharpened edge for creating an incision in, and the abrasive surface is configured to abrade, atherosclerotic material located within a blood vessel when the expandable portion is in the opened position.

Abstract: A catheter can restore the patency of a body lumen, for example, by removing tissue from a body lumen (e.g., a blood vessel). The catheter can be a rotational catheter having a rotatable drive shaft and a tissue-removing element secured to the drive shaft to be driven in rotation by the drive shaft. The catheter can have an abrasive burr configured to abrade tissue in a body lumen. The catheter can have an expandable tissue-removing element. The catheter can include a balloon and an inflation conduit. The catheter can also be configured to move over a guidewire through a body lumen. In one embodiment, the catheter comprises an over-the-wire, balloon-expandable, rotational, and abrasive tissue-removing catheter.

Abstract: A scalpel has a handle (1) and a blade carrier (2) movable within a longitudinally extending cavity therein between an operative position in which a blade (5) on the blade carrier is exposed for use and an inoperative retracted position. A manually operable slider (4) moves the blade carrier (2) that has a catch face (21) directed rearwards in the operative position. The catch face partially aligns with a stop face (22) provided on the handle (1) in the normal operative position of the blade carrier such that force exerted on a blade carried by the blade carrier in the direction of the length of the handle causes engagement of the catch face with the stop face to arrest movement of the blade carrier into the cavity. Transverse biasing of the blade carrier (2) is overcome by pressure exerted on the slider (4) to retract the blade carrier (2) into the handle with the catch face (21) passing the stop face (22).

Abstract: A device set and a method for producing a micro-graft matrix with a plurality of punched full-thickness skin parts (12) from skin includes a film set of at least one first film (1) and one second film (2), which adhere to and are peelable from one another; an adhesive (10) to stick the first film (1) onto the skin; a cutting device with an adapter to provide a predefined distance to the skin and to make a plurality of hollow-cylindrical cuts vertical to the film set down to a predetermined depth in the skin underneath, the film set being respectively cut and divided, so that an outer portion of the second film can be peeled off and inner portions remain; and a third film (3), stuck in contact with the second film (2). The punched full-thickness skin parts can be extracted from the skin as the micro-graft matrix using the third film (3).

Abstract: A prepuce extruding, cutting, hemostasis, and healing assembly using ultrasonic wave. Ultrasonic wave is applied in extruding, cutting, hemostasis, and healing of prepuce at a conjunction of internal and external tissues of a distal part of a human body. The assembly includes an ultrasonic generating device, a transmission device and a circumcision device. The ultrasonic generating device is used for generating ultrasonic waves, is connected to the transmission device and can send the ultrasonic waves to the transmission device. The transmission device is connected to the circumcision device and can send the ultrasonic waves to the circumcision device. The circumcision device is used for extruding and cutting a prepuce and/or performing hemostasis and/or healing of wounds. In this way, circumcision can be completed within just several seconds, and immediate healing can be achieved, preventing bleeding during and after a surgery.

Abstract: A circumcision device is provided by the present invention. The device comprises two jaws (1, 2) configured to crush a foreskin (3) between them along a crush region transverse to a foreskin and transverse to a general direction in which a penis being circumcised extends. The jaws are movable between an open inoperative position and a closed operative position in which a clamping and crushing force may be exerted to promote hemostasis within the crush region. The device includes a cutting assembly (7, 8, 9) capable of traversing and severing a crushed foreskin within or adjacent the crush region. The invention to a glans penis protector comprising a handle (41) separable from a transverse glans penis engaging cover (43) so that the handle can be separated from the glans penis engaging cover during a circumcision procedure.

Abstract: Examples of catheter devices, removable needle devices and kits are disclosed. Also methods for accessing a hollow organ are disclosed. The catheter devices include a body extending longitudinally from a proximal end to a distal end, wherein the body includes an elongated channel along a longitudinal length of the body extending from the proximal end to the distal end of the body, wherein the channel is configured to receive an elongated needle of a removable needle device, and the body includes one or more cutting edges extending in a proximal direction from the distal end of the body. The body of the catheter device includes one or more recesses adapted to mate with one or more catches of the removable needle device for coupling the needle device to the catheter devices. Also methods of using the catheters, removable needle devices and the kits are disclosed.

Abstract: A port fixation device is disclosed and includes a body portion and a plug. The body portion includes a circular portion, a first tab, and a second tab. The circular portion defines an aperture which is configured to allow a surgical access port to extend therethrough. The first tab and the second tab are disposed in mechanical cooperation with the circular portion. Movement of the first tab with respect to the second tab from a first position to a second position causes a diameter of the aperture to change from a first size to a second size. The first size is smaller than the second size, and the first position of the first tab is its rest position. The plug is disposed in mechanical engagement with the body portion, and has sufficient elasticity to remain engaged with the body portion when the first tab is in the first position and in the second position.

Abstract: A bubble for use with various medical equipment or other sites on the body such as IV ports, feeding tube locations, PODs, CGMs (Continuous Glucose Monitors) or other equipment connected to the body, whereby the bubble assists in protecting the site, and hopefully prevents medical equipment from being dislodged, if installed, to provide for strenuous activity or even application of water, such as bathing, showering, etc.

Abstract: A surgical access assembly includes a cannula, a valve housing attached to the cannula, and a valve assembly positioned in the valve housing. The valve assembly includes a centering mechanism with a hoop and fingers, a ring with a flange at one end of the ring, a retainer having first and second discs, a guard having a frame and flaps attached to the frame, and a seal with petals attached to a support. The guard is at least partially disposed in the first disc and the seal is at least partially disposed in the second disc.

Abstract: A cannula having multiple curves, devices for creating the cannula, and methods for using the cannula having multiple curves. One of the devices comprises two dies configured to mate together to transform a straight cannula into a double-curved cannula having two curves, and a base that is configured to slideably guide the two dies from respective initial positions to a mating position.

Abstract: A lead-implantation tool for implanting a lead into a patient includes an elongated body having a distal portion with a tip configured to separate patient tissue to form, or extend through, a tunnel in the tissue when the body is advanced along the tissue. A lead-retention element is formed along the distal portion of the body and includes a cutout defined along the body with a cutout surface wall inset from the body's outer surface. A protrusion extends outwardly from the cutout surface wall with at least a portion of the protrusion extending towards the tip. The protrusion is entirely inset from, or flush with, the body's outer surface. The protrusion is configured to removably receive and retain a portion of the lead while the distal portion of the body is advanced along the tissue and to separate from the lead as the body is withdrawn from the tissue.

Abstract: A catheter system for retrieving a leadless cardiac pacemaker from a patient is provided. The cardiac pacemaker can include a docking or retrieval feature configured to be grasped by the catheter system. In some embodiments, the retrieval catheter can include a snare configured to engage the retrieval feature of the pacemaker. The retrieval catheter can include a torque shaft selectively connectable to a docking cap and be configured to apply rotational torque to a pacemaker to be retrieved. Methods of delivering the leadless cardiac pacemaker with the delivery system are also provided.

Abstract: Survival of patients suffering from many infections diarrheal diseases, including Ebola, as well as trauma and post-partum hemorrhage is improved with large-volume, parenteral, fluid replacement. In lieu of IVs, Intra-Osseous (IO) lines are placed with the help of a Humerus-Finder™, a one-piece guide that identifies the humeral head at the shoulder and allows for easy, safe, placement of an IO line. This guide enables healthcare providers and lay-providers to place IO lines and deliver fluids to infected persons without direct contact, limiting risk to providers. The Humerus-Finder™ makes early, potentially life-saving, supportive treatment available where large-volume fluid infusion can save lives and is useful in disaster medicine and emergency medicine when it is not possible to place an IV line rapidly and safely by helping first responders achieve IO access for delivery of fluid resuscitation in a safe, reliable manner.

Abstract: According to some embodiments, systems and methods for reshaping bone are provided. The systems may include an implant body, an actuator coupled to the implant body, a sensor configured to detect a parameter indicative of a biological condition, a transceiver, and a controller. The transceiver may be configured to transmit data associated with the parameter to an external remote control and receive instructions from the external remote control. Finally, the controller is configured to move the actuator in response to the instructions from the external remote control, wherein the actuator adjusts the implant body. The methods may include measuring a parameter indicative of a biological condition; transmitting data associated with the parameter from the implantable device to an external remote control; transmitting instructions from the external remote control to the implantable device; and actuating the bone growth device in response to the instructions from the external remote control.

Abstract: Robotic rod benders are disclosed including a motor housing and a mechanical housing coupled with the motor housing. The motor housing may include first and second rod feeding/rotating motors, a brake motor, a bending motor, first and second rod feeding/rotating transmission inputs, a brake transmission input, and a bending transmission input. The mechanical housing may include a rod feeding/rotating subassembly, a brake subassembly, a bending subassembly, first and second rod feeding/rotating transmission outputs, a brake transmission output, and a bending transmission output. Separate motor and mechanical housings are also disclosed.

Abstract: Correction of a scoliotic curve in a spine comprises the steps of implanting an expanding rod isolated completely under the skin and attached to selected portions of the scoliotic curve of the spine at opposing ends of the rod; and producing a controlled force by means of expansion of the rod over at an extended time period under external control until a desire spinal curve is obtained. An incremental force is generated to stretch the scoliotic curve of the spine between the selected portions where attachment of the rod is defined. The controlled force is provided steadily for at least one month or alternatively 1-3 months. Multiple rods may be employed each associated with a different scoliotic curve of the spine or a different portion of the scoliotic curve.

Abstract: The present disclosure includes a polyaxial bone fixation element for use in spinal fixation to interconnect a longitudinal spinal rod with a patient's vertebra. The polyaxial bone fixation element preferably includes a bone anchor, a collet, a body, and a locking cap. The polyaxial bone fixation element preferably enables in-situ assembly. That is, the polyaxial bone fixation element is preferably configured so that in use, the bone anchor may be secured to the patient's vertebra prior to being received within the body. Accordingly, the polyaxial bone fixation element enables a surgeon to implant the bone anchor without the body to maximize visibility and access around the anchoring site. Once the bone anchor has been secured to the patient's vertebra, the body can be snapped-onto the bone anchor. The bone anchor preferably also includes a second tool interface so that a surgical instrument can be directly coupled to the bone anchor.

Abstract: An apparatus and method for joining members together using a self-drilling screw apparatus or stapling apparatus are disclosed. The screw apparatus includes a worm drive screw, a spur gear and superior and inferior screws which turn simultaneously in a bi-directional manner. A rotating mechanism drives the first and second screw members in opposite directions and causes the screw members to embed themselves in the members to be joined. The screw apparatus can be used to join members such as bones, portions of the spinal column, vertebral bodies, wood, building materials, metals, masonry, or plastics. A device employing two screws (two-in-one) can be combined with a capping horizontal mini-plate. A device employing three screws can be combined in enclosures (three-in-one). The stapling apparatus includes grip handles, transmission linkages, a drive rod a fulcrum and a cylinder.

Abstract: Devices, systems, and methods for inserting a vertebral stabilization member, such as a rod. The insertion device includes an outer guide tube, a pin assembly including a pin and a pusher member extending therethrough. The insertion device is configured to actuate a rod between a first orientation and a second orientation angled with respect to the first orientation in order to position the rod in an appropriate location for attachment to bone.

Abstract: A plate for securing two bone segments in a tibial plateau levelling osteotomy procedure having a body with an elongate distal portion and a proximal portion extending laterally and a plurality of apertures for receiving fixing means wherein at least two of the apertures are adapted to receive fixing means and at least one of the said apertures is adapted to receive a removable plug which extends proud of the bone-facing surface. One of the apertures has a camming surface configured such that upon insertion of the fixing means the bone fragments are urged together thereby promoting healing without deleterious compression of the surface of the bone.

Abstract: Clavicle fixation devices and methods thereof. A clavicle fixation device includes an elongated plate extending between first and second ends, the elongated plate defining a plurality of spaced apart screw holes. At least one pair of relief cuts extends into the elongated plate on opposite sides thereof, the at least one pair of relief cuts axially positioned between a pair of the spaced apart screw holes and at least one pair of suture holes along opposite sides of the elongated plate, the at least one pair of suture holes axially positioned between a pair of the spaced apart screw holes. At least one pair of relief cuts is axially aligned with a pair of suture holes to define combined holes on opposite sides of the elongated plate.

Abstract: A bone fastening device includes a ready-to-assemble plate assembly including hingedly secured first, second, third, and fourth plates, first insertion members, second insertion members, a plurality of upper half adjustment members, and a plurality of lower half adjustment members; and a plurality of screws configured to drive through the first, second, third, and fourth plates into the broken bone.

Abstract: An implant assembly for a human sternum and ribs can include a sternal implant and a rib link. The sternal implant can be couplable to a sternum. The rib link can include a distal portion, a proximal portion, and a strut. The distal portion can be couplable to a rib. The proximal portion can be couplable to the sternal implant. The strut can connect the distal portion to the proximal portion. The strut can be configured to flex so that the distal portion can be aligned with the rib.

Abstract: A sacroiliac joint fusion screw and associated delivery tools and method. Embodiments of the sacroiliac joint fusion screw comprise a shaft having proximal and distal end portions and a head on the proximal end of the shaft. A threaded portion on a distal portion of the shaft is configured to engage a sacrum. A glide zone portion on the shaft between the threaded portion and the proximal end portion is configured to extend through an ilium. The screw can provide stability and compression to the joint.