Don't lose your nerve

时间:2019-03-06 06:13:01166网络整理admin

By Marina Murphy THERE’s hope for those who tremble when they hear the drone of a dentist’s drill. Pain-free lasers can not only replace the dreaded drill, they can also save infected nerves. When the living nerve inside a tooth becomes infected, the standard treatment is to drill out the nerve and fill the interior of the tooth. In the US alone, dentists perform 20 million root canal treatments every year. But the procedure usually weakens the tooth and makes it discolour. Now Richard Hansen of the Center for Advanced Dentistry in Fullerton, California,