The dental drill noise is so distinctive the brain still recognises it and people still hear it, such is the anxiety.

牙钻的声音如此独特以至于大脑人就能够将其识别，人们也仍旧能够听见这种噪声。这边产生了焦虑感。

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A special chip called a digital signal processor analyses the incoming sound from microphones placed close to the dental drill.

在牙钻附近安置了麦克风，一种称为数字信号处理器的特殊芯片会对麦克风中获取的声音进行分析。

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The use of a high-speed dental drill may introduce air into the soft tissue and lead to subcutaneous emphysema and pneumomediastinum.

拔牙时所使用的高速牙科电钻可能使得气体进入软组织，进而导致皮下气肿及纵膈气肿。

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Instruments should be sterilized in between each patient, including the dental drill.

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Moreover, the laser, which resembles a dental drill in shape, can do things a dentist would never do with a drill, like cut gums.

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But Chief Dental Officer Barry Cockcroft denied claims it would not change the treadmill of "drill and fill", whereby the more treatments dentists do, the more they earn.

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