| 摘要 |
An operating mask for protection of the operator from airborne bacteria and viruses during dental operations. One form of mask includes a cup which encloses at least the nose, mouth, and chin areas of the face of the wearer and which is made of a rigid material, with a peripheral gasket secured to it. The mask is carried by a headband, and use of the gasket and adjustment of the headband permit an air-tight chamber to be formed. The mask also includes air inlet means and exhaust means so that purified air can be forced into the chamber formed by the cup, while contaminated air can be evacuated completely away from the atmosphere in which the operation takes place. Communication means are also provided as well as means for protecting the hearing of the user. Protection of the eyes from trauma and infection and aids for sharper visualization and protection of visual acuity are also provided. In the preferred form of the invention, the entire face is enclosed, but it is possible to utilize the general principles of the invention with variations in which only the nose, mouth, and chain areas of the user are enclosed in the airtight chamber. A still further variation permits the use of a complete head-enclosing helmet which is sealed over the shoulders in a manner comparable to football shoulder pads or by means of a cuffed suit or tunic.
|
