Abstract: A bone fusing implant device includes an elongated body extending along a longitudinal direction, and has one or more elongated grooves extending along the longitudinal direction on an outer surface of the elongated body and one or more elongated ridges alternating with the one or more elongated grooves and extending along the longitudinal direction on the outer surface of the elongated body. The elongated body includes a first segment having an outer surface with cortical threads, a second segment having an outer surface with cancellous threads, a top segment and a bottom segment. The first segment is configured to engage a cortical bone with the cortical threads and the second segment is configured to engage a cancellous bone with the cancellous threads. The cortical threads and the cancellous threads are formed on the one or more elongated ridges and do not extend into the one or more elongated grooves.