| 主权项 |
1. An implant and implant removal tool assembly comprising:
an implant (5) comprising a hole (7) and an outer threaded portion, wherein said outer threaded portion is arranged in a first handedness; and an implant removal tool (1) to enable removal of said implant (5), said implant configured to be osseointegrated to a patient's bone, said implant removal tool (1) comprising:
a head (2), to which a system capable of providing torque to the implant removal tool (1) is to be attached,an unthreaded neck connected at a first end to one end of the head, anda threaded body (4) connected at a first end to a second end of the unthreaded neck, and having a second end configured to be inserted into the hole (7) of the implant (5), wherein the threaded body (4) is arranged in a second handedness opposite to said first handedness and consists only of,
in a position extending directly from the second end of the unthreaded neck, a first threaded area (4a) having a constantly decreasing outermost diameter corresponding to peaks of a thread of said first threaded area (4a), and a constantly decreasing innermost diameter corresponding to valleys of said thread of said first threaded area (4a),in a position extending directly from the first threaded area (4a), a second threaded area (4b) having a constant outermost diameter corresponding to peaks of a thread of said second threaded area (4b), and a constant innermost diameter corresponding to valleys of said thread of said second threaded area (4b), wherein said innermost diameter in the second threaded area is greater than the internal diameter of the hole (7) of the implant (5), andin a position extending directly from the second threaded area (4b), a third threaded area (4c) having a constantly decreasing outermost diameter corresponding to peaks of a thread of said third threaded area (4c), and a constantly decreasing innermost diameter corresponding to valleys of said thread of said third threaded area (4c). |
