Bone Screw Tool Interface With Asymmetric Orientation Aid

The patent applies asymmetry by providing the alignment aid (guide groove or guide surface) at only one specific location on the tool attachment point, rather than symmetrically on all teeth. This asymmetric positioning allows the guide structure to occupy space that would otherwise be contact surface, but only on one side. The complementary asymmetric design of the screwing-in and unscrewing contact surfaces ensures that the full engagement height is maintained in the screwing-in direction while providing alignment guidance, thus resolving the contradiction between ease of docking and torque transmission.

The patent applies local quality by providing the alignment aid only at specific localized positions on the tool attachment point, rather than uniformly across the entire structure. The guide groove or guide surface is confined to a specific region, allowing the majority of the tooth profiles to maintain their simple interlocking geometry. This localized approach ensures reliable alignment through the asymmetric guide structure while keeping the overall device complexity low, as the alignment functionality is achieved through targeted modifications rather than comprehensive structural changes.