A dynamic bone fixation element can include a sleeve elongate along a first direction and a fixation member. The sleeve can define a channel that extends from a proximal end through to a distal end along the first direction. The channel has a first cross-sectional dimension. The fixation member has a head, a shaft extending from the head and elongate along a second direction, and an abutment member extending from the shaft and integral with the shaft, wherein the shaft extends through the channel such that the sleeve is captured between the abutment member and the head. At least a portion of the shaft that is within the channel has a second cross-sectional dimension that is less than the first cross-sectional dimension such that the fixation member is moveable with respect to the sleeve along a direction that has a directional component transverse to the first direction.一種動態骨頭固定元件，可以包括沿著一第一方向伸長的一套管以及一固定構件。該套管可以限定沿著該第一方向從近端延伸貫穿至遠端的一通道。該通道具有一第一截面尺寸。該固定構件具有一頭部、延伸自該頭部並且沿著一第二方向伸長的一軸、以及延伸自該軸並且與該軸一體的一支座構件，其中該軸延伸穿過該通道，這樣使得該套管被捕獲在該支座構件與該頭部之間。該通道內的該軸的至少一部分具有小於該第一截面尺寸的一第二截面尺寸，這樣使得該固定構件沿著具有橫向於該第一方向的方向分量的一方向相對于該套管是可運動的。
