Medical Fastener or Device with Dual Surface Topography

Abstract

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.

Dependencies are inferred from the claim text.