■■■ NY Timesの記事 ■■■
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題名: A Dental Shift: Implants Instead of Bridges
記者: By JANE E. BRODY
発行日: November 17, 2009
URL: http://www.nytimes.com/2009/11/17/health/17brod.html
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【Answers to Content Questions/内容についての質問の正解】
1 A bridge is not a permanent solution and it is too hard for
most people to keep their gums and underlying bone healthy.
2 A bridge lasts about 10 years and implants rarely need to be
replaced.
3 A titanium screw is inserted into the supporting bone and
then a small fake tooth called an abutment is attached,
followed by a crown.
4 An implant costs 33% more than a bridge.
5 The chances of success are reduced because a poorer blood
supply reduces the fusion of bone cells to the implant.
