The connected health market, which traditionally includes devices like watches, bracelets, or scales, is now expanding into more intimate areas of daily life, such as the mouth. Connected toothbrushes are being marketed as tools to turn a routine, often rushed activity into a more precise health care practice. The question remains whether these devices are simply marketing gimmicks or true daily health assistants. A connected toothbrush is an electric toothbrush equipped with various sensors and electronic chips. Depending on the model, different technologies are embedded, including motion sensors (accelerometers and gyroscopes) that detect the position, inclination, and speed of the brush in the mouth in real time. These sensors help identify which areas of the mouth are being cleaned. Pressure sensors measure the force exerted on the enamel and gums, and some models automatically reduce the brush's intensity or warn the user if too much pressure is applied, as seen in the Philips Sonicare Prestige 9900. Recent models incorporate artificial intelligence (AI) and machine learning algorithms to analyze sensor data and recognize brushed areas. High-end models, such as the Oral-B iO Series 9, display a 3D map of the teeth to highlight areas that may be neglected, such as the inner face of the molars. Bluetooth or Wi-Fi connectivity allows the brush to transmit data to a dedicated mobile application. The advantages of a connected toothbrush include immediate and long-term feedback, enabling users to adapt their brushing habits for improved oral health. These devices help protect enamel and gums from excessive friction by measuring the applied force and guiding users to maintain a recommended brushing duration of two minutes. Some models allow users to customize the brushing experience, such as adjusting vibration strength. The gamification aspect of the mobile application, including scores, can motivate users, especially younger individuals, to adopt proper brushing techniques. Data tracking also provides reports that can be shared with dentists during check-ups. However, there are considerations before purchasing a connected toothbrush. The main benefit relies on the accompanying application, which requires a smartphone. If a user does not intend to take their phone into the bathroom or consult the application regularly, the investment may be of limited use. Privacy concerns also arise, as applications collect brushing habits, such as times, duration, and frequency, often through an online account. Users should review the privacy policy and the possibility of deleting their data. The autonomy and charging requirements of the brush should also be considered, as Bluetooth chips and sensors consume energy. Users should check the autonomy promise to avoid frequent recharging. When selecting a connected toothbrush, factors such as brushing technology, tracking precision, application ergonomics, price, and availability of replacement brush heads should be considered. Brushing technologies include round oscillating-rotating heads and elongated sonic heads, with some models combining both. Tracking precision varies, with basic models segmenting the mouth into four areas, while high-end models like the Oral-B iO Series 9 offer real-time 3D tracking of up to 16 areas. The interface of the application should be clear, and for children, brands offering playful interfaces are preferable. Several models have been tested, including the Laifen Wave Pro (139 euros), the Oral-B iO Series 6 (130 euros), and the Philips Sonicare Prestige 9900 (around 200 euros). A more affordable option is the Oclean X Pro Elite, a Chinese model priced at 79 euros. On September 1st, Dyson entered the market with the CameraJet, a high-end model sold for 479 euros. However, ten days later, Dyson suspended sales in France due to a component defect in some of the first batches. Dyson has promised a return "as soon as possible," but no specific date has been provided.