An improved bone screw or medical device comprising at least one smooth surface and at least one textured surface. The improved bone screw has a cylindrical body with a first end and a dosed second end. The head is positioned at the first end and configured to engage with a driver to advance the bone screw into a bane, and a tip is positioned at die second end. The exterior thread of the screw component has a smooth surface and a textured surface on at least one side and, preferably, only one side. The textured surface promotes honey on-growth and mechanical interlocking, and prevents premature withdrav,u1 of the bone screw from the bone. The smooth surface reduces the amount of insertion torque required during the installation process.

Described herein are devices, systems and methods for treating disease and/or infection by the release of silver from an implant over an extended period of time. In particular, the devices described herein may be used to treat infections such as osteomyelitis by the controlled release of silver ions from multiple sites of an extended-use implant. This implant typically includes a plurality of arms that both anchor and help distribute the released ions within the tissue. Power may be applied to release the silver ions into the tissue.

A medical that is implantable into a human or animal body or being an augmentation device for strengthening human or animal hard tissue for subsequent implantation of a separate implant. The device includes a sheath element suitable of being brought into contact, during a surgical operation, with live hard tissue and/or with hard tissue replacement material. The sheath element has a, for example, generally elongate shape and a longitudinal bore defining a longitudinal opening reaching from a proximal end of the sheath element into a distal direction, and a plurality of holes in a wall of the opening. Further, the device includes a liquefiable element that is insertable or inserted in the longitudinal opening and at least partly liquefiable by the impact of energy impinging from the proximal side.

A dynamic bone anchor includes an anchor member having a tubular body with a first end and a second end, the anchor member defining an anchor axis including a plurality of barb elements, and being made at least partially of a nickel-titanium (Ni—Ti) based shape memory alloy. The dynamic bone anchor also including a core member configured to be inserted from the first end through the second end such that a first portion of the tubular body extends out from the first end, and a second portion of the tubular body extends out from the second end. The anchor member and the core member are configured such that when assembled, the first portion of the core member is spaced apart from the anchor member and movable with respect to it, and the second portion of the core member is fixed to and movable together with the anchor member.

A bone screw comprises a shaft defining a longitudinal axis and a minor diameter. The shaft including a core having an angled surface relative to the axis. The angled surface extending from the minor diameter adjacent a proximal portion of the shaft to a distal portion of the shaft, and a wall disposed about the angled surface. The wall including at least one thread having an external thread form. In some embodiments, systems, spinal constructs, surgical instruments and methods are disclosed.

An embodiment includes a sacroiliac joint bone anchor system comprising: a bone anchor including an outer surface and an inner surface; wherein (a)(i) the outer surface includes a proximal third, a middle third, and a distal third, (a)(ii) the middle third of the outer surface includes at least one aperture that couples the outer surface to the inner surface; (a)(iii) the proximal third of the outer surface includes proximal threads, and (a)(iv) the distal third of the outer surface includes distal threads; wherein (b)(i) the bone anchor is cannulated, (b)(ii) a channel is located on the inner surface, (b)(iii) the channel extends from a proximal third of the inner surface to a distal third of the inner surface, and (b)(iv) the channel provides at least one half a rotation about a long axis of the bone anchor.

Compression devices for joining tissue and methods for using and fabricating the same.

Embodiments may include an attachable fastener, which may include a bondable material that may be secured to the end of an end effector. Vibration may be tuned to occur at a distal end of the fastener. Accordingly, the fastener may be used to generate heat at a distal point of contact. If the contact surface contains bondable material, that material may be softened. If the fastener includes bondable material at the point of contact, that material may also be softened by heat produced by vibration at the contact area. A hard implant or another polymeric material may function as the anvil.

A bone screw includes a shaft with at least one thread having an external thread form. An implant receiver includes a first portion and a second portion. The first portion has a solid configuration relative to the second portion. In some embodiments, systems, spinal constructs, surgical instruments and methods are disclosed.

A medical nail mold suited for casting ankle fusion nails is presented. The medical nail mold contains a mold body, a mold cavity, a mold opening, and a core guide. The mold cavity traverses within the mold body. The mold opening is positioned adjacent to the mold cavity. The core guide is connected adjacent to the mold body. The core guide is aligned with the mold opening and the mold cavity.