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Unitary preassembled disposable intra-oral rubber dam device
Unitary preassembled disposable intra-oral rubber dam device
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机译:整体式预组装一次性口腔橡胶坝装置
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摘要
A unitary preassembled disposable intra-oral rubber dam device comprises an annular resilient frame member such as a resilient plastic cord frame, and an elastic latex membrane, the perimeter of the membrane being secured to the frame member such that the membrane is maintained in substantially the same plane as the frame member. The annular frame member, having a predetermined configuration, has a memory characteristic such that when pressure applied to distort the frame member is relaxed the frame member returns to substantially its predetermined configuration.
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