A Cavitron is a brand-name ultrasonic scaling device used during dental cleanings to remove plaque, tartar, and stains from teeth. It works by vibrating a small metal tip 30,000 times per second while spraying a stream of water, breaking apart hardened deposits that would otherwise need to be scraped off manually with hand instruments. Made by Dentsply Sirona, the Cavitron is one of the most widely used ultrasonic scalers in North American dental offices, and its name has become nearly synonymous with ultrasonic cleaning itself.
How a Cavitron Works
The Cavitron uses a technology called magnetostrictive vibration. Inside the handpiece, a stack of metal strips converts electrical energy into rapid mechanical vibrations that travel to a thin, curved tip. That tip oscillates in an elliptical pattern, meaning it moves in a tiny oval rather than just back and forth. This allows all surfaces of the tip to be active during scaling, giving the hygienist flexibility in how they angle the instrument against your teeth.
The vibrations alone don’t do all the work. The water spray serves two purposes: it keeps the tip and your tooth cool, and it creates two physical effects that help clean below the gumline. The first is cavitation, where the ultrasonic vibrations cause microscopic bubbles to form and collapse in the water. These collapsing bubbles generate tiny shockwaves and jets that dislodge bacteria and biofilm from tooth surfaces and small crevices. The second is acoustic microstreaming, a swirling current in the water around the tip that flushes debris out of gum pockets. These effects extend roughly 1 to 4 millimeters beyond the tip itself, meaning the Cavitron can clean areas it isn’t directly touching.
Cavitron vs. Hand Scaling
If you’ve had a dental cleaning, you’ve probably experienced both ultrasonic and hand instruments in the same visit. Hand scaling uses sharp, curved metal tools that the hygienist manually pulls along the tooth surface to scrape off calculus. It’s effective but can be slow, especially in deep gum pockets or hard-to-reach areas like the spaces where tooth roots divide (called furcations).
A large meta-analysis comparing the two approaches found no significant difference in clinical outcomes six months after treatment. Pocket depth reduction and gum attachment levels were essentially the same whether ultrasonic or hand instruments were used. The practical advantage of the Cavitron is speed and access. Deep pockets that are difficult and time-consuming to clean with hand tools are easier to reach with a slim ultrasonic tip, which means less chair time for you. Most hygienists use the Cavitron for the bulk of the work, then follow up with hand instruments to fine-tune specific areas.
What It Feels Like
During a Cavitron cleaning, you’ll feel a buzzing vibration against your teeth and hear a high-pitched humming sound. There’s a constant flow of water in your mouth, which a suction device pulls away. The sensation is different from hand scaling. Rather than the scraping pressure of a metal instrument, it feels more like a steady vibration with occasional sensitivity, particularly around areas where your gums have receded or where enamel is thin.
In one study of 20 patients undergoing ultrasonic cleaning, 85% reported moderate discomfort and 15% described the pain as mild. Nearly half chose to take ibuprofen afterward. Pain scores during the procedure were actually lower with the ultrasonic device than with hand instruments, but tooth sensitivity afterward was slightly higher. Temporary sensitivity to cold or pressure in the days following a Cavitron cleaning is one of the most common side effects.
A few factors affect your comfort level. Higher power settings and prolonged contact in one spot increase discomfort. Slim, newer tip designs tend to cause less pain than traditional wider tips. If you’re sensitive, your hygienist can use lower power, warmer water, and lighter pressure to make the experience more comfortable.
Magnetostrictive vs. Piezoelectric Scalers
The Cavitron is a magnetostrictive scaler, but it’s not the only type of ultrasonic device. Piezoelectric scalers, more common in European dental offices, use vibrating crystals instead of metal strips to generate movement. The key difference is in how the tip moves. Magnetostrictive tips move in an elliptical pattern, making all sides of the tip active. Piezoelectric tips move in a primarily linear, back-and-forth direction, so typically only two sides of the tip are effective at any given angle.
Magnetostrictive devices like the Cavitron operate at around 30 kHz, while piezoelectric units range from 25 to 50 kHz. Both are clinically effective. The choice between them often comes down to what the dental office has invested in and what the hygienist was trained on.
Special Tips for Implants
Standard Cavitron tips are metal and can scratch the surface of titanium dental implants, creating rough spots where bacteria can collect. For patients with implants, Dentsply Sirona makes a specialized insert called the SofTip, designed to gently remove plaque and light calculus from titanium implant surfaces and abutments without damaging them. If you have implants, it’s worth confirming that your hygienist is using the appropriate tip during your cleaning.
When a Cavitron May Not Be Used
The most notable precaution involves patients with cardiac pacemakers or implantable defibrillators. Magnetostrictive scalers generate electromagnetic fields that can potentially interfere with these devices. A 2015 study found minor electromagnetic interference when the scaler was used within 18 inches of the device leads. A 2022 guideline from the British Heart Rhythm Society notes that at a distance of at least 15 centimeters (about six inches), interference from ultrasonic scalers is unlikely to present a clinical risk, but patients with cardiac implants should be carefully monitored during the procedure. Piezoelectric scalers appear to be safer in this context and may pose no risk at all.
The American Dental Association recommends that dentists consult with a patient’s cardiologist before using ultrasonic or electronic devices, and that they avoid waving the device or placing electrical cords over the patient’s chest area during treatment.
Insert Wear and Effectiveness
Cavitron tips are not permanent. They wear down with use, and a worn tip is significantly less effective. Losing just 1 millimeter of the active tip reduces cleaning efficiency by 25%. A 2-millimeter loss cuts efficiency in half, at which point the insert should be replaced. Dental offices typically use wear guides or overlay cards to compare a used tip against a new one. If your cleaning feels like it’s taking longer than usual or the hygienist seems to be going over the same areas repeatedly, a worn insert could be part of the reason.
The Water Spray and Aerosols
The water spray that makes the Cavitron effective also creates aerosols, fine mists that can carry bacteria from your mouth into the surrounding air. This became a significant concern during the COVID-19 pandemic and led to updated safety protocols in dental offices. Common measures include having patients rinse with an antimicrobial mouthwash before the procedure, using lower power settings to reduce spray, and positioning you so that water pools in the corner of your mouth for easier suction. Many offices also improved their ventilation systems and added high-volume evacuation suction to capture aerosols close to the source.