Self-tapping screw for small-bone surgery

Details Self-tapping screw for small-bone surgery Self-tapping screw for small-bone surgery

2006-05-02

2006-05-02

Nguyen, Anhtuan T. (Department: 3731)

Surgery

Instruments

Orthopedic instrumentation

C606S075000

Reexamination Certificate

active

07037309

ABSTRACT:
Self-tapping screw for small-bone surgery, includes a threaded proximal head (2), a threaded distal shank with greater pitch and an internal cannula (4), characterized in that the distal shank (3) is threaded over its entire length in that the end of the shank has, apart from milled portions forming self-tapping faces on the first distal threads, at least two milled faces and which with the cannula, determine at least two notches (11), and at least two self-boring edges at the distal end of the screw, and in that the thread of the head has, aside from milled portions forming self-tapping faces on the first threads of the proximal screw thread, chamfered faces (16–19), determining boring edges (12b–15b) preceded by a short groove.

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patent: 2 722 086 (1996-01-01), None

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