US Patent 8491302 Dental implant

A dental implant with a coarsely threaded portion suitable for nesting within the cortical bone, and a finely threaded portion suitable for nesting within the cancellous bone. A primary thread with a constant pitch and a constant major diameter, runs along both the finely threaded portion and the coarsely threaded portion, and has a large thread height in the coarsely threaded portion, and a small thread height in the finely threaded portion. At least one secondary thread, having the constant pitch and the small thread height, runs along the finely threaded portion at an offset from the primary thread.