Abstract: An implant device (100d) for engagement with a bone of a subject, said the implant device (100d) comprising a distal end (102d), a proximal end (104d), a central shaft (106d), a longitudinal central axis (108d) and a helical thread portion (110d) having a leading edge (114d) and a trailing edge (116d). A portion of the leading edge (114d) extends in a direction towards the distal end (102d) of the implant further than the most distal portion of the root (112d) of the thread portion (110d); and wherein the trailing edge (116d) extends in a direction of from the most proximal portion of the root (112d) in a radial outward direction and towards the distal end (102d); and a crest portion (118d) disposed between the leading edge (114d) and the trailing edge (116d) and wherein said the crest portion (118d) forms a radially outward portion of the thread portion (110d). Hence, the implant device (100d) improved the axial pull-out strength and reduced stress concentration.

Abstract: Devices and methods for treating bone fractures involving a micromotional unit (6) that produces reciprocating displacement between two fracture fragments (1) to thereby apply controllable micromotion to a fracture site.

Abstract: An implant device (100d) for engagement with a bone of a subject, said the implant device (100d) comprising a distal end (102d), a proximal end (104d), a central shaft (106d), a longitudinal central axis (108d) and a helical thread portion (110d) having a leading edge (114d) and a trailing edge (116d). A portion of the leading edge (114d) extends in a direction towards the distal end (102d) of the implant further than the most distal portion of the root (112d) of the thread portion (110d); and wherein the trailing edge (116d) extends in a direction of from the most proximal portion of the root (112d) in a radial outward direction and towards the distal end (102d); and a crest portion (118d) disposed between the leading edge (114d) and the trailing edge (116d) and wherein said the crest portion (118d) forms a radially outward portion of the thread portion (110d). Hence, the implant device (100d) improved the axial pull-out strength and reduced stress concentration.

Abstract: An implant device (A1) for engagement with a bone of a patient, the implant device (A1) comprising a distal end (B1), a proximal end (C1), a central shaft (D1) extending therebetween and a longitudinal central axis (E1); the implant device (A1) further including a helical thread portion (F1) extending circumferentially about the central shaft (D1) and extending from the distal end (B1) towards the proximal end (C1) thereof, and a root (G1) at the base of the helical thread portion (F1) adjacent the central shaft (D1), the helical thread portion (F1) including a leading edge (H1) and a trailing edge (I1) both extending at least radially outwardly from the central shaft (D1) and defining the thread portion (F1) therebetween, with the root (G1) of the thread portion (F1) defined therebetween in a direction of the longitudinal central axis (E1) of the implant device (A1); wherein the leading edge (H1) faces in a direction of at least towards the distal end (B1) of the implant device (A1), and the trailing edge (I