Abstract: Shown is a detachable head covering unit for use with a generally rectangular patient rescue bag with an open head end and one part of a two-part quick connect/disconnect fastener device that extends proximally to and along transverse edges defining the open head end. The hood includes lower and upper substantially planar portions having inner surfaces, outer surfaces, perimeters each with an attachment portion, the attachment portions including a mating part of a two-part quick connect/disconnect fastener device that extends proximally to and along an edge thereof. The upper and lower portions are secured to one another along substantially their entire perimeters except at the attachment portion of the perimeter. A face opening is provided in the upper portion and the opening extends to and intersects the edge of the attachment portion such that separate parts of the edge are releasably secured together to form a substantially continuous attachment edge.

Abstract: The present invention is directed to orthodontic brackets having wire slots therein that are less than about 0.0175 inches in width, and greater than about 0.0165 inches, and more preferably about 0.017 inches. Additionally, the slots of the brackets of the invention can have a shallower depth than prior art slots, and in particular, a depth of approximately 0.024 inches. Thus, in one embodiment, a bracket having a slot of 0.017?×0.024? (0.43 mm×0.60 mm) is provided, wherein this new bracket is particularly useful for reorienting second molars. Moreover, the brackets of the present invention are in keeping with clinical requirements for anchorage and the need for overtreatment. In addition, the present invention meets the needs for placing teeth in positions to protect against the forces that cause malocclusion in order to best prevent relapse. Furthermore, the present invention provides the requirements for application of appropriate forces, particularly dental expansion.