China now boasts seven of the 10 longest bridges in the world, all built within the past decade. Such engineering feats were once mainly the province of the United States, which for much of the latter half of the 20th century boasted most of the longest bridges in the world. Here are the 10 longest bridges in the U.S., and no matter how well traveled you are, four or five of these bridges will come as a surprise.
There are two types of neck braces: soft and rigid. A soft cervical collar is made from thick foam rubber covered in cotton. It is used to support your neck and control pain after an injury (e.g., whiplash).
Types of Braces. Invisalign | Rubber Bands. InvisalignÂ®. InvisalignÂ® is the clear way to straighten teeth without braces, using aligners. Aligners are removable and virtually invisible, which means you can straighten your teeth without anyone knowing; and you can still eat and drink what you want. Also, you can brush and floss normally to maintain healthy gums and teeth; and there are no wires, metal or brackets to cause mouth abrasions.