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).
Braces have three basic parts: 1) Brackets â brackets that are attached to each tooth. 2) Bonding or band â the material that attaches the bracket to the tooth. 3) Arch Wire â a thin metal wire that runs from bracket to bracket. Braces have come a long way from the âtrain trackâ look of years ago. Today, many orthodontic patients can get braces that attach to the backs of the teeth, or use transparent brackets.