A disposable reamer head assembly configured for cutting through an intramedullary space of a long bone, comprising: a) a cylindrical body extending along a longitudinal axis and comprising an outer surface, a proximal end portion and a distal end portion, a central passageway extending longitudinally through the body thickness and along the body length; and a series of body slots formed partially cut from a position within the outer surface of the cylindrical body into the cylindrical body, each of said body slots having a slot length being not parallel with the longitudinal axis and extending from a portion of the cylindrical body proximal end to a portion of the cylindrical body distal end, and having a slot depth, the slot depth extending through the outer surface of the cylindrical body such that the slot depth does not penetrate into the central passageway; b) at least two reamer blades, each being continuous and comprising a reamer blade attachment portion and a reamer blade cutting portion, partitioned therebetween by a reamer blade transition line that extends along a reamer blade longitudinal axis; and c) wherein each reamer blade is bent at an angle along the transition line such that the reamer blade cutting portion and the reamer blade attachment portion are not coplanar, and wherein each reamer blade is positioned about the cylindrical body, spaced apart from adjacent reamer blades by a blade separation distance and a blade separation area therebetween, whereby each reamer blade attachment portion is positioned in the respective body slot and is attached to the distal end portion of the cylindrical body such that the at least two reamer blades are integrated with the cylindrical body therebetween. a) a cylindrical body extending along a longitudinal axis and comprising an outer surface, a proximal end portion and a distal end portion, a central passageway extending longitudinally through the body thickness and along the body length; and a series of body slots formed partially cut from a position within the outer surface of the cylindrical body into the cylindrical body, each of said body slots having a slot length being not parallel with the longitudinal axis and extending from a portion of the cylindrical body proximal end to a portion of the cylindrical body distal end, and having a slot depth, the slot depth extending through the outer surface of the cylindrical body such that the slot depth does not penetrate into the central passageway; b) at least two reamer blades, each being continuous and comprising a reamer blade attachment portion and a reamer blade cutting portion, partitioned therebetween by a reamer blade transition line that extends along a reamer blade longitudinal axis; and c) wherein each reamer blade is bent at an angle along the transition line such that the reamer blade cutting portion and the reamer blade attachment portion are not coplanar, and wherein each reamer blade is positioned about the cylindrical body, spaced apart from adjacent reamer blades by a blade separation distance and a blade separation area therebetween, whereby each reamer blade attachment portion is positioned in the respective body slot and is attached to the distal end portion of the cylindrical body such that the at least two reamer blades are integrated with the cylindrical body therebetween.