VOA常速英语2008年-New Study Links Smoking Marijuana to Gum Diseas
时间：2019-02-02 作者：英语课 分类：VOA常速英语2008年（二月）
Washington, DC
06 February 2008
Recent studies show that cigarette smoking is one of the most significant factors leading to gum disease. And now, new research indicates smoking marijuana also promotes gum disease even for those who do not smoke cigarettes. VOA's Carol Pearson has more.
For decades, people in the United States -- and in some other countries as well -- have debated whether to legalize marijuana, or allow its use for medicinal purposes.
In the western U.S. state of California, patients in some areas can buy marijuana from a vending 1 machine.
Marijuana is known to ease some aches and pains, but a new study shows that habitual 2 use can lead to serious gum disease. Those most at risk? Young adults.
Murray Thomson and colleagues at a research institute in New Zealand examined roughly 900 young adults.
"When we were looking at the new cases of gum disease between 26 and 32, fully 3 one-third of those new cases were due to cannabis smoking. That really surprised us," Thomson said.
They found even light users -- those who smoked marijuana once a week -- tripled their chances of getting gum disease over those who did not smoke pot. The increased risk held true even for those who did not smoke tobacco.
The researchers say toxins 4 from marijuana destroy circulation and prevent the gums from being able to heal.
Periodontist Peter Cabrera says if you smoke marijuana, you may not even know you have serious gum disease until you start losing teeth, especially if you start smoking marijuana as a young adult. "So by the time you're in your 40s and 50s, you're likely to have lost a significant number of your teeth."
Gum disease also increases the risk of heart disease and stroke. And unless it is treated, gum disease will progress. This study was published in the Journal of the American Medical Association.
- Why Are You Banging on the Vending Machine? 你为什么敲打这台自动售货机？ 来自朗文快捷英语教程 2
- Coca-Cola had to adapt almost 300,000 vending machines to accept the new coins. 可口可乐公司必须使将近三十万台自动贩卖机接受新货币。 来自超越目标英语 第5册
- He is a habitual criminal.他是一个惯犯。
- They are habitual visitors to our house.他们是我家的常客。
- The doctor asked me to breathe in,then to breathe out fully.医生让我先吸气，然后全部呼出。
- They soon became fully integrated into the local community.他们很快就完全融入了当地人的圈子。