Electric toothbrushes are safe to use with a pacemaker. Multiple clinical studies have tested electric toothbrushes directly on patients with pacemakers and implantable cardioverter-defibrillators (ICDs) and found no interference with normal device function. The concern is understandable, since any motorized device generates some level of electromagnetic field, but the fields produced by an electric toothbrush fall well below the threshold that could disrupt a modern cardiac implant.
What the Clinical Evidence Shows
Researchers have put this question to the test in controlled settings more than once, and the results are consistent. A prospective clinical study that enrolled 32 consecutive patients with either pacemakers or ICDs tested a range of dental electrical devices, including electric toothbrushes. The investigators found no significant clinical interference with the sensing or pacing functions of any device during electric toothbrush use.1PubMed. Interference between dental electrical devices and pacemakers or defibrillators: results from a prospective clinical study A separate study testing various dental equipment against ICDs confirmed the same finding: the electric toothbrush caused no electromagnetic interference regardless of how the ICD was programmed or positioned.2Acta Odontologica Scandinavica. Electromagnetic interference of dental equipment with implantable cardioverter defibrillators
An earlier study published in The Journal of the American Dental Association tested a broad list of dental devices on cardiac implants and found the same result for electric toothbrushes specifically: operation of the electric toothbrush did not alter pacing function.3The Journal of the American Dental Association. Interference of Cardiac Pacemaker and Implantable Cardioverter-Defibrillator Activity During Electronic Dental Device Use Taken together, these studies paint a clear picture. Electric toothbrushes simply do not generate enough electromagnetic energy to trip up a pacemaker or defibrillator.
Why the Electromagnetic Fields Are Too Weak to Matter
Electric toothbrushes do produce electromagnetic fields. That part of the worry is technically accurate. The small motor inside generates low-frequency magnetic fields during operation, and these fields can even induce tiny electric currents in nearby metallic objects like orthodontic wires.4PubMed. Magnetic fields from electric toothbrushes promote corrosion in orthodontic stainless steel appliances but not in titanium appliances But there is a massive difference between inducing a microcurrent in a wire sitting millimeters from the brush head and generating enough electromagnetic energy to reach a pacemaker implanted in the chest wall, roughly half a meter away.
Electromagnetic field strength drops off rapidly with distance. By the time the weak field from a toothbrush motor reaches your upper chest, it is many orders of magnitude below what would be needed to interfere with a cardiac device. This is fundamentally different from, say, holding a strong industrial magnet directly against your chest or leaning into a running arc welder. The physics simply does not support the idea that brushing your teeth poses a risk to your pacemaker.
How Pacemaker Configuration Affects Vulnerability
Not all pacemakers respond to electromagnetic fields the same way. One variable that matters is whether the device is programmed with bipolar or unipolar sensing. Most modern pacemakers use bipolar leads, where the two sensing electrodes sit close together at the tip of the lead inside the heart. This design is inherently resistant to external electromagnetic interference because both electrodes pick up roughly the same background noise, and the device cancels it out.
Unipolar systems, by contrast, use the pacemaker’s metal casing as one of the two electrodes. Because the casing sits in the chest wall while the other electrode sits inside the heart, the “antenna” between them is much larger, making the device far more susceptible to stray electromagnetic fields. A study that tested pacemakers and ICDs against various low-frequency electromagnetic sources found that none of the bipolar pacemakers or ICDs experienced interference from any source. All three unipolar pacemakers tested, however, were affected when exposed to the strongest fields in the study.5EP Europace. Electromagnetic interference with cardiac pacemakers and implantable cardioverter-defibrillators from low-frequency electromagnetic fields in vivo Even then, the fields that tripped up the unipolar devices were generated by a Helmholtz coil in a lab setting, not by anything resembling a household appliance.
Patients with older unipolar pacemaker systems are more prone to electromagnetic interference in general, including from sources as mundane as vigorous upper-body exercise causing pectoral muscle artifacts.6PubMed Central. Electromagnetic interference on pacemakers If you have an older unipolar system and have concerns about any electromagnetic source, that is worth discussing with your cardiologist. But even for unipolar devices, the evidence shows electric toothbrushes are not a realistic source of trouble.
Dental Office Equipment Is a Different Story
While your electric toothbrush at home is a non-issue, the dental office contains equipment that generates considerably stronger electromagnetic fields. Ultrasonic scalers, electrosurgical units, and ultrasonic baths are the devices that have drawn the most scrutiny from researchers. The prospective study of 32 patients that found no clinical interference from electric toothbrushes did note minor, non-clinical interference in the telemetry from the cardiac programming unit during use of the ultrasonic scaler and ultrasonic bath.1PubMed. Interference between dental electrical devices and pacemakers or defibrillators: results from a prospective clinical study The interference was picked up by the monitoring equipment rather than the implant itself, and it had no impact on the patient, but it illustrates that professional dental devices operate at a different energy level than anything you use at home.
This distinction matters practically. If you have a pacemaker or ICD and are going in for dental work, it is worth telling your dentist about your implant. Most dental offices already ask about cardiac devices on their intake forms. The American Dental Association and cardiology guidelines recommend awareness and sometimes monitoring during certain procedures, even though the risk is low. At home, though, your electric toothbrush falls into the same category as any other small household appliance: no special precautions needed.
Built-In Protections in Modern Cardiac Devices
Modern pacemakers and ICDs are not fragile instruments sitting defenseless against the electromagnetic world. They are engineered to operate in environments filled with everyday electromagnetic sources. Manufacturers are required to test their devices for electromagnetic compatibility before they can receive regulatory approval. In the European market, this means meeting standards defined in EN 45502 series documents for pacemakers and ICDs; in the United States, the FDA requires compliance with ISO 14117, which defines electromagnetic compatibility performance limits and test methods.7EP Europace. Electromagnetic interference in cardiac electronic implants caused by novel electrical appliances emitting electromagnetic fields in the intermediate frequency range: a systematic review
These standards exist precisely because pacemaker patients live in a world full of motors, wireless signals, and electrical devices. The implants include internal filtering and shielding designed to reject the kinds of electromagnetic noise that household appliances produce. A comprehensive review of the engineering principles and clinical evidence behind electromagnetic interference with cardiac devices concluded that the overall risk of clinically significant adverse events from electromagnetic interference is very low, and that no special precautions are needed when household appliances are used.8PubMed Central. Effects of external electrical and magnetic fields on pacemakers and defibrillators: from engineering principles to clinical practice That assessment covers the full spectrum of home devices, from kitchen appliances to personal electronics, with electric toothbrushes firmly included.
Practical Considerations for Your Brushing Routine
Given the evidence, you do not need to avoid electric toothbrushes or switch to a manual brush because of a pacemaker. There are no special techniques required, no minimum distance to maintain, and no types of electric toothbrush (sonic, oscillating-rotating, or otherwise) that have been flagged as riskier than others. The research has tested various types, and the consistent result is no clinically meaningful interference.
That said, a few common-sense practices apply to pacemaker patients across all aspects of daily life, not just brushing:
- Keep your cardiologist informed: Mention any new device concerns at your regular checkups. Your doctor can confirm your specific pacemaker model and settings.
- Know your device type: If you are unsure whether your pacemaker uses bipolar or unipolar sensing, ask at your next appointment. The vast majority of devices implanted in the last two decades use bipolar leads, but knowing for sure removes any lingering uncertainty.
- Report unusual symptoms: If you ever feel lightheaded, dizzy, or notice your heart rhythm changing while using any device, stop using it and contact your care team. This advice applies universally and is not specific to electric toothbrushes.
The takeaway for oral hygiene is straightforward. Electric toothbrushes are generally better at removing plaque than manual brushing, and good oral health matters for cardiac patients. Gum disease has been linked to cardiovascular inflammation in broader research, so avoiding a tool that improves your dental hygiene out of unfounded fear would arguably work against your heart health rather than protect it.
Smart Toothbrushes and Bluetooth Connectivity
Many modern electric toothbrushes come with Bluetooth connectivity for syncing with a phone app to track brushing habits. This raises a separate question for some pacemaker patients: does Bluetooth pose a risk? Bluetooth operates at very low power levels, typically around one milliwatt, and communicates at 2.4 GHz. Pacemakers are designed to be immune to this type of signal. The radiofrequency energy from Bluetooth is far below the thresholds that could affect cardiac device function, and it falls outside the low-frequency range where electromagnetic interference with pacemakers is even theoretically possible. No clinical studies have identified Bluetooth devices as a source of pacemaker interference.
The electromagnetic spectrum is wide, and not all parts of it are equally relevant to pacemaker safety. The frequencies that pose the most risk to cardiac implants tend to be low-frequency magnetic fields of substantial strength, the kind produced by industrial equipment, large magnets, or medical imaging machines. The weak radiofrequency signals from personal consumer electronics like Bluetooth toothbrushes, wireless earbuds, and fitness trackers sit in a completely different part of the spectrum and at power levels that are clinically irrelevant.
Common Sources of Electromagnetic Worry That Are Actually Fine
The anxiety around electric toothbrushes is part of a broader pattern where pacemaker patients worry about everyday devices that turn out to be perfectly safe. Microwave ovens are probably the most famous example. For decades, patients were told to keep their distance from running microwaves, but modern pacemakers are well-shielded against microwave leakage, and no current guidelines recommend avoiding them. Hair dryers, electric shavers, television remote controls, and standard household power tools all fall into the same bucket of “sounds worrying, but the evidence shows no problem.”
Where the evidence does support caution is with strong magnets, certain industrial equipment, and specific medical procedures. MRI machines, for instance, generate powerful magnetic fields that can genuinely interfere with cardiac implants, which is why MRI scans require careful screening and, in some cases, specialized MRI-conditional pacemaker models. Anti-theft gates at store entrances produce electromagnetic fields that can theoretically affect pacemakers if you stand directly between them for an extended period, though simply walking through at a normal pace is fine. Induction cooktops have also drawn some scrutiny because they generate relatively strong electromagnetic fields at close range, and a few case reports have documented pacemaker interference in patients who lean directly over the cooktop while it runs at high power.
The pattern is consistent: devices that generate strong, sustained electromagnetic fields in close proximity to the chest warrant some awareness. Small personal grooming devices operated at arm’s length or further from the implant do not. Your electric toothbrush is firmly, and by a wide margin, in the second category.
Why the Myth Persists
If the evidence is this clear, why do so many pacemaker patients still worry about electric toothbrushes? Part of the answer is that early pacemaker technology really was more vulnerable to electromagnetic interference. Devices implanted in the 1970s and 1980s had less sophisticated filtering and shielding, and the cautionary advice from that era became embedded in public awareness. Some of that advice gets passed from patient to patient, or from well-meaning family members who remember reading a warning decades ago.
Another factor is that medical guidance tends to be conservative, and for good reason. When a cardiologist tells you to “be careful around electronic devices,” the intention is reasonable, but the message is vague enough to make a patient scrutinize everything with a motor or a battery. Manufacturers of electric toothbrushes sometimes add precautionary language to their packaging because liability teams prefer blanket warnings over nuanced explanations. The result is a disconnect between what the clinical evidence actually shows and what the patient reads on a box or hears secondhand.
The research on this specific question is reassuring, and it has been replicated across multiple study designs and patient populations. Electric toothbrushes have been tested on pacemakers in isolation, alongside other dental devices, in prospective clinical settings, and in laboratory bench tests. Every approach has reached the same conclusion: no clinically significant interference. For a field where evidence can be patchy and equivocal, the consistency here is worth noting.