英語聽力文摘 種植自己的假牙
Grow Your Own Dentures
種植牙也叫人工種植牙，并不是真的種上自然牙齒，種植牙而是通過醫(yī)學(xué)方式，將與人體骨質(zhì)兼容性高的純鈦金屬經(jīng)過精密的設(shè)計(jì)，制造成類似牙根的圓柱體或其他形狀，以外科小手術(shù)的方式植入缺牙區(qū)的牙槽骨內(nèi)，經(jīng)過 1～3 個(gè)月后，當(dāng)人工牙根與牙槽骨密合后，再在人工牙根上制作烤瓷牙冠。因不具破壞性，種植牙已被口腔醫(yī)學(xué)界公認(rèn)為缺牙的首選修復(fù)方式。 種植牙由于人工牙深植牙骨內(nèi)，可承受正常的咀嚼力量，功能和美觀上幾乎和自然牙一樣，因此，被人們稱為人類的第三副牙齒。
Learn how to grow your own dentures on this Moment of Science.
How Medical technology is paving the way for people to (1)throw out those dentures, bridges((假牙上的)齒橋) or synthetic implants, and grow their own teeth back. I’m talking genuine teeth, the real McCoy. And you grow them in your mouth, in the very gaps where your dear departed teeth used to sit. The magic dust, if you will, are stem cells that come from your own gums.
Stem cells are basically unprogrammed cells. They’re useful because they can be programmed to (2)take on various functions, depending on what a body’s in need of.You got it.So in this case, stem cells in your gums would be extracted in order to be programmed in a lab to grow a tooth. Then doctors would insert them back into your gums, so they can do their job.
The procedure will be a lot less invasive and less traumatic than many current tooth replacement options. It’s beneficial too because a living tooth isn’t motionless, but adjusts in response to a person’s bite, and in doing so it can help maintain the health of the surrounding teeth and gums.
Will the technology be available any time soon?Not but i'm planning on losing any teeth of course.I mean so I can tell my friend Bob.
Tell Bob the Scientists anticipate making the procedure available to the public in about five years.
Notes:
(1)throw out ['θr?uaut] v.扔掉;伸出;說出;否決;突出
Never throw out anybody .
不要放棄任何人。
(2)take on 承擔(dān);呈現(xiàn);具有;流行;接納;雇用;穿上
The old term has taken on a new meaning.
這個(gè)舊詞有了新的含義。
