Dyson's CameraJet is a $500 three-in-one toothbrush that scans your maw

Dyson’s $500 CameraJet toothbrush uses a 100-k-pixel macro lens to capture 28 live images per second. Within 100 ms it fires a conical water jet from a 12.5 ml tank, guided by a machine-learning system trained on 470,000 dental images. The anti-gravity tank and diaphragm pump allow jets in any orientation. A companion app offers live-view guidance, personalized feedback, and adjustable brushing intensity.