Mastoid bone start drill bit
    1.
    发明授权

    公开(公告)号:US11291462B2

    公开(公告)日:2022-04-05

    申请号:US15477707

    申请日:2017-04-03

    Abstract: A drill bit for drilling into bone, including at least a first, second and third longitudinally extending substantially straight flute blades, wherein the drill bit has an extrapolated outer profile established by rotation of the first, second and third flute blades 360 degrees about a longitudinal axis thereof, the extrapolated outer profile includes a first surface having tangents more perpendicular than parallel to the longitudinal axis, and the extrapolated outer profile includes a second surface having tangents more parallel than perpendicular to the longitudinal axis.

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