英国牛津大学的科学家最近研制出一种“无痛注射器”,正在英国的临床研究中心进行试验。 俗话说:牙痛不是病,痛起来真要命。这是因为人的牙床中有丰富的神经及血管,所以在拔牙前,医生都会给病人打一针麻醉药,等到麻醉药发挥作用,医生才能开始拔牙。拔过牙齿的人很有体会,打麻醉针真痛！可是现在你瞧,医生把一种没有注射针头的注射器,放入病人口腔内,贴在需要拔牙的一侧口腔粘膜上,病人只感到被一股气流冲了一 British Oxford University scientists recently developed a “painless syringe”, is the British clinical research center for testing. As the saying goes: toothache is not a disease, it tastes terrible. This is because people’s gums are rich in nerves and blood vessels, so before pulling tooth, the doctor will give the patient a shot of anesthetic, until the anesthetic to play a role, the doctor can begin to tooth extraction. People who have pulled their teeth are very experienced, anesthesia needle really hurt! But now you see, the doctor put a syringe without a needle into the mouth of the patient, sticking to the oral mucosa on the side to be tooth-extracted, and the patient feels a