| 摘要 |
A control system having a built-in voice alert system for alerting a dental professional of the time, depth or stage in a dental procedure. The dental procedure may include a dental restoration, dental whitening and root canal procedure. The control system may also include a headphone or other private listening device, for example, so that only the dental professional alone will receive the voice alert. In one aspect, the private listening device may be a wireless listening device such as a wireless radio frequency device or an infrared device.
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