Surgical sagittal saw blade with a blade bar and a pivoting blade head, the blade bar having a support that extends trough the blade head

A surgical saw blade (52, 52a, 52b, 702) comprises an elongated blade bar (494, 494a) and a blade head (76, 76a) pivotally mounted to the blade bar (494, 494a). The blade bar has opposed proximal and distal sections. The proximal section has a feature (516, 538) for releasably holding the blade bar to a powered surgical sagittal saw. The distal section is formed with a void space and a primary opening into the void space. The blade head has a base (496, 496a) disposed in the blade bar distal section opening and a crown (498) integral with the base that extends through and outside of the blade bar distal section primary opening. The crown is formed with teeth (499, 499a). Further, the blade bar is formed with at least one secondary opening (522, 708, 710, 862) in the distal section separate from the primary opening, wherein the secondary opening opens into the void space so that debris can flow from out of the void space through the secondary opening.