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Orthodontic headgear. Orthodontic headgear is a type of orthodontic appliance typically attached to the patient's head with a strap or number of straps around the patient's head or neck. From this, a force is transferred to the mouth/jaw (s) of the subject. Headgear is used to correct bite and support proper jaw alignment and growth.
A facemask (also referred to as a protraction facemask, orthopedic facemask, or reverse-pull headgear) is a type of an orthodontic headgear used to treat underbite and other malocclusions where the upper jaw is too far backwards. [1] A metal bar sits in front of the patients face with support from the forehead and chin.
An open-circuit rescue or firefighting SCBA has a full-face mask, also called the face-piece, a demand regulator, air cylinder, pressure gauge, (sometimes with an integrated PASS device), and a harness with adjustable shoulder straps and waist belt which lets it be worn on the back. The air cylinder is commonly 4 liter, 6 liter, or 6.8 liter ...
Pork pie hat. Shovel hat. Sidara – national Iraqi headgear. Shtreimel. Sombrero. Spodik. Keffiyah or sudra. Papal tiara – a hat traditionally worn by the Pope, which has been abandoned in recent decades, in favor of the mitre. Top hat, also stovepipe hat, chimney pot hat, lum hat, or (in collapsible form) gibus.
Elastomeric masks must be individually fit-tested and inspected for full efficacy. [2] They may be somewhat easier to fit than filtering facepiece respirators. Older mask designs were designed only to fit young adult men of average weight and a narrow range of ethnicities; newer ones use updated anthropometry and fit more people.
The European respirator standards refer to the filtering half mask classification by EN 149, EN 14683, and EN 143, all European standards of testing and marking requirements for respirators. [ 1] FFP standard masks (where FFP stands for filtering facepiece) [ 2] cover the nose, mouth and chin and may have inhalation and/or exhalation valves.
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