从一个7岁男孩的嘴里取出526颗牙齿，就像“牡蛎里的珍珠”

Doctors in India have removed 526 teeth from a 7-year-old boy.

印度医生从一名7岁男孩身上摘除了526颗牙齿。

The 7-year-old, named Ravindranath, was taken to Saveetha Dental College in Chennai, India, after he complained of swelling on the right side of his lower jaw.

这名7岁的男孩名叫拉文德拉纳特(Ravindranath)，他被送往印度金奈(Chennai)的Saveetha牙科学院(Saveetha Dental College)接受治疗，此前他抱怨自己的下颌右侧肿胀。

His parents said he had experienced the swelling since he was 3, India's National Herald reported, but the condition had worsened and required immediate medical attention.

据印度《国家先驱报》(National Herald)报道，他的父母说，他从3岁起就开始肿胀，但病情恶化，需要立即就医。

An X-ray of the boy's jaw revealed a sack of tissue weighing 200 grams, doctors said. It contained 526 teeth.

医生说，男孩下巴的x光片显示出一袋重达200克的组织。它有526颗牙齿。

The sack was a "compound composite odontoma," a benign tumor made up of normal dental tissue such as enamel, according to CBS News. Such tumors are most commonly found in teenagers.

据哥伦比亚广播公司新闻报道，这个袋子是一个“复合牙本质瘤”，是由正常的牙釉质等牙齿组织构成的良性肿瘤。这种肿瘤最常见于青少年。

Some were a 10th of a millimeter, while others were up to 15 millimeters, the Times of India reported, but all had the properties of teeth, with a crown and a molar.据《印度时报》(Times of India)报道，其中一些只有0.1毫米，而另一些则高达15毫米，但它们都具有牙齿的特征，有牙冠和臼齿。

The surgery took five hours.

手术花了五个小时。

"It was reminiscent of pearls in an oyster," said the doctors, according to the Herald.

据《先驱报》报道，医生们说:“这让人想起牡蛎中的珍珠。

Not so fast: Teeth-whitening strips could harm layer of teeth, studies suggest.

”没那么快:研究表明，牙齿美白条可能会损害牙齿层

The cause of the growth remains unclear, though doctors at the college have narrowed down the possibilities to genetics or even radiation from cellphone towers.

这种增长的原因还不清楚，不过该学院的医生已经缩小了基因甚至是手机信号塔辐射的可能性。

A similar case took place in 2014, when dentists extracted 232 teeth from a teen in Mumbai.

2014年也发生过类似的情况，当时牙医从孟买的一名青少年身上拔下了232颗牙齿。