HORI KOJI,堀 弘二,NISHIZAWA MASAYOSHI,西澤 正祥,MATSUNO ARIYOSHI,松野 有良,YOSHIMOTO RYUICHI,吉本 龍一
申请号：
JP2011169228
公开号：
JP2013031555A
申请日:
2011.08.02
申请国别(地区):
JP
年份:
2013
代理人:
摘要：
PROBLEM TO BE SOLVED: To accurately implant a dental implant at a position designed during diagnosing.SOLUTION: The dental implant 51 includes a male screw part 2 and an insertion torque increase part 3 from a distal end side. The male screw part includes a plurality of screw parts 4 and 5 of the same lead and different pitches. The plurality of screw parts are arranged in the size order of the pitch so that the pitch becomes larger on the distal end side. The outer diameter of the male screw part is fixed in the direction of a center axis 11 or is larger on the insertion torque increase part side. The insertion torque increase part includes a thread having the lead different from the lead of the male screw part or a projected line continuing in a circumferential direction. On the cross section of the insertion torque increase part including the center axis, a contour line connecting, in an order along a center axis direction, top parts of the thread of the screw part adjacent to the insertion torque increase part among the plurality of screw parts is a straight line, and the top part of the thread or the top part of the projected line of the insertion torque increase part is positioned on an extension of the contour line.COPYRIGHT: (C)2013,JPO&INPIT【課題】診断時に設計した位置に歯科用インプラントを正確に埋植する。【解決手段】歯科用インプラント51は、先端側から、雄ねじ部2と埋入トルク増大部3とを備える。雄ねじ部は、リードが同じでピッチが異なる複数のねじ部4,5を含む。複数のねじ部は、先端側ほどピッチが大きくなるようにピッチの大きさ順に配置されている。雄ねじ部の外径は、中心軸11方向において一定又は埋入トルク増大部側ほど大きい。埋入トルク増大部は、雄ねじ部のリードとは異なるリードを有するねじ山又は周方向に連続する凸条を含む。中心軸を含む断面において、複数のねじ部のうち埋入トルク増大部に隣り合うねじ部のねじ山の頂部を中心軸方向に沿って順に繋いだ輪郭線が直線であり、輪郭線の延長線上に埋入トルク増大部のねじ山の頂部又は凸条の頂部が位置している。【選択図】図1C
