While preventing the end of the screw, release of the device which reduces the external form of the bone fixed plate. The plate where 2 screws pass by bone tissue and being few possess open part 2. Being little in the device, it includes one buff section and the engagement section. When the screw is tightened, it starts connecting the plate to the bone. The screw head being the plate with the disturbance position, when it is disturbed, it can overcome insertion power there is a somewhat resistivity. When the screw furthermore is tightened, it slides and enters with pachin into the fit territory and makes free movement possible. If power of the screw which comes off from the plate is possible, the screw head about exceeds the disturbance section stronger one is good. In order the screw to advance side by side to move in the opening, being little, it is constituted to the opening whose 1 among open part 2 is long. It is desirable to include the positioning screw for preventing the end.スクリューの外れを防止しながら骨固定プレートの外形を縮小する装置の公開。骨組織をスクリュー2個が通る少なくても開口部2個を有すプレート。装置には少なくても1つの緩衝セクションと係合セクションを含む。スクリューを締めると、骨にプレートを接続し始める。妨害地点でスクリュー頭部がプレートで妨害されると、挿入力が克服できる若干の抵抗力がある。スクリューをさらに締めると、滑りばめ領域にパチンと入り自由な移動を可能にする。プレートから外れるスクリューの力は、できればスクリュー頭部が妨害セクションを越える程強くないほうが良い。すき間でスクリューが並進運動するように、少なくても開口部2個のうち1個が細長いすき間に構成される。外れの防止のために位置決めねじを含むのが好ましい。
