Abstract: A modular reusable elastomeric half-face respirator device includes a modular housing and an elastomeric facepiece. The respirator device can include one or more modular straps, which can be coupled to the filter housing or the facepiece. The modular housing includes a modular filter component configured to hold filter media and to couple to the facepiece. A filter retention mechanism includes an interlocking bayonet-type ratcheting ramp configured to form a seal around the modular filter component, the filter media, or both. The facepiece can include an interfacing portion configured to seal to the face of a person wearing the respirator device, the interfacing portion having a geometry with an outward curvature allowing the interfacing portion to seal to the face by rolling back and increasing contact area between the facepiece and the face. A lock ring receivable in a port of the facepiece can couple the facepiece to the filter component.

Abstract: Systems for treating and/or preventing fractures include at least one needle sized and configured to be placed into target bone and at least one implantable pin configured to be releasably held in a first needle of the at least one needle. The systems also include at least one delivery device of injectable material configured to couple to the first needle while the first implantable pin is held in the first needle whereby the at least one delivery device and a respective needle cooperate to serially provide an external column of the injectable material about the at least one implantable pin.