A.Researchers say this method could be especially useful for children. B.It also says the technology speeds up a natural process of tooth repair. C.If the cavity is not too deep,the experience can be unpleasant. D.The dentist covers the problem area with a mineral solution,and then uses an electrical current to harden this material. E.Researchers say they believe it will save a lot of trips to the dentist's. |
Many people fear a visit to the dentist.hey are not so much afraid of the doctor,but of the dental equipment and treatments.
Well,fear no more!A British company says it has developed technology that will end the need for mechanical cleaning of dental cavities(龋齿).(59) ______ .
For over a century,dentists have been repairing cavities the same way.They first remove the decayed,or bad,tooth tissue with an electric-powered drill.Then,they fill the hole in the bone with a metallic or plastic substance.
(60) ______ .However,if it is deep,near the nerve of the tooth,it can be very painful.The worst part is that the process of drilling and filling the cavity has to be repeted for the entire life of that tooth.
Rebecca Moazzez is a senior lecturer at King's College London.She says that this cycle lasts the rest of the tooth's life."You're really in that cycle of repair and replacement for the rest of the tooth's life."Tooth enamel(牙釉质) is what we see on the outside of the tooth.The enamel of a damaged tooth can be replaced naturally.This process is called re-mineralization.But it is too slow to stop bacteria from building up in small,narrow areas of the enamel.
A British business called Reminova has developed a method for speeding-up this natural re-mineralization of early-stage cavities.Jeff Wright is head of the company."We've just found a way to make that a much faster process.Driving healthy calcium and phosphate minerals into your enamel and,through a natural process,it will bind on and add to the enamel that's there."The process begins with a cleaning of the cavity.This does not require power tools.(61) ______ .The electricity is too weak for the patient to feel.And the hardened mineral completely fills the cavity.
(62) ______ .Sometimes children have bad experiences at the dentist.They fear the drilling and injections.Who wouldn't be afraid?Better experiences as a child might lead to more visits to the dentist as an adult.