OSADA TSUTASHIGE,長田 伝重,KAWASAKI KEIKICHI,川崎 恵吉,KONO SHIGERU,河野 茂,FUJITA JUNICHI,藤田 淳一
申请号：
JP2012180536
公开号：
JP2014036746A
申请日:
2012.08.16
申请国别(地区):
JP
年份:
2014
代理人:
摘要：
PROBLEM TO BE SOLVED: To prevent a bone pin or a bone screw for fixating a plate for a fracture treatment on a radius from being loosened.SOLUTION: A plate for a fracture treatment includes a diaphysis plate part applied to a diaphysis portion of a radius (6) and a head plate part (5a) applied to a distal end portion (6a) of the radius and has a plurality of through-holes formed respectively on the diaphysis plate part and the head plate part for inserting a bone pin or a bone screw. In the plate for a fracture treatment, the through-holes (9,10) on a head plate part side are provided in two rows in a manner to follow a subchondral bone (6c) of the distal end portion of the radius. A female screw where a male screw formed on a head part (7a) of the bone screw or the bone pin (7) of a single-axis type is screwed is formed on the through-hole (9) in the row on the distal side. Fixing means for fixing the bone screw or the bone pin (8) of a multiple-axis type in a desired direction is provided on the through-hole (10) in the row on the proximal side. The bone screw or the bone pin of the multiple-axis type is fixed by the fixing means while the bone screw or the bone pin of the single-axis type that is inserted into the desired through-hole in the row on the distal side abuts on the subchondral bone, and the bone screw or the bone pin of the multiple-axis type that is inserted into the desired through-hole in the row on the proximal side abuts on the subchondral bone.COPYRIGHT: (C)2014,JPO&INPIT【課題】骨折治療用プレートを橈骨に止める骨ピン又は骨ネジの緩みを防止する。【解決手段】橈骨(6)の幹部に当てられる幹板部と、橈骨の遠位端部(6a)に当てられる頭板部(5a)とを備え、幹板部と頭板部の各々に骨ネジ又は骨ピンを挿入するための複数個の貫通穴が形成された骨折治療用プレートにおいて、頭板部側の貫通穴(9,10)は、橈骨の遠位端部の軟骨下骨(6c)に沿うように二列にわたって設けられ、そのうち遠位側列の貫通穴(9)には、単軸型の骨ネジ又は骨ピン(7)の頭部(7a)に形成された雄ネジが螺合する雌ネジが形成され、近位側列の貫通穴(10)には、多軸型の骨ネジ又は骨ピン(8)を所望の向きで固定する固定手段が設けられ、遠位側列の所望の貫通穴に挿入された単軸型の骨ネジ又は骨ピンが軟骨下骨に当接し、かつ近位側列の所望の貫通穴に挿入された多軸型の骨ネジ又は骨ピンが軟骨下骨に当接した状態で固定手段によって多軸型の骨ネジ又は骨ピンが固定されるようにした。【選択図】図2
