A perio cleaning, short for periodontal cleaning, is a deeper type of dental cleaning designed for people with gum disease. Unlike a standard cleaning that polishes the visible surfaces of your teeth, a perio cleaning goes below the gumline to remove bacteria, plaque, and hardened tartar that have built up in the pockets between your teeth and gums. The procedure is sometimes called a “deep cleaning” or, more formally, scaling and root planing.
How It Differs From a Regular Cleaning
A regular dental cleaning (called a prophylaxis) only addresses the crowns of your teeth, meaning everything visible above the gumline. It’s a preventive measure for people with generally healthy gums, and most people need one twice a year.
A perio cleaning works in a fundamentally different zone. Your dentist or hygienist removes plaque and tartar both above and below the gumline using handheld instruments, ultrasonic tools, or a combination. The “root planing” part involves smoothing the rough surfaces of tooth roots so your gums can reattach more snugly, which makes it harder for bacteria to colonize again. This distinction matters because bacteria trapped in deep gum pockets can’t be reached by regular brushing, flossing, or a standard cleaning.
Why Your Dentist Recommends One
The key measurement is pocket depth. Your dentist uses a small probe to measure the space between each tooth and the surrounding gum tissue, recorded in millimeters. Healthy gums typically measure 1 to 3 mm. Pockets of 4 to 5 mm indicate moderate gum disease, and anything 6 mm or deeper signals severe periodontitis.
A perio cleaning is generally recommended when you have pockets of 5 mm or more. Insurance coding reflects this: the procedure is billed per quadrant of your mouth, with different codes depending on whether four or more teeth in that quadrant have pockets of 5 to 6 mm, or just one to three teeth do. Your dentist may treat one or two quadrants per visit to keep the appointment manageable, which means the full treatment sometimes takes two separate sessions.
What the Procedure Feels Like
Because the cleaning reaches below the gumline and along the roots, your gums are numbed with local anesthesia beforehand. You’ll feel pressure and vibration, especially if ultrasonic instruments are used, but not sharp pain. The appointment typically runs longer than a regular cleaning, often 45 minutes to an hour per quadrant being treated.
Afterward, expect some tenderness and mild soreness for a few days. Sensitivity to hot and cold foods is normal and can last up to a week. Your gums may also be swollen or bleed slightly during that initial recovery window. Over-the-counter pain relievers are usually enough to manage discomfort. If sensitivity or pain lingers beyond three to four weeks, that warrants a follow-up call to your dentist.
What Results to Expect
The goal is to shrink those gum pockets so bacteria have less space to thrive. Research on pocket depth reduction shows meaningful improvement: moderate pockets (4 to 5 mm) shrink by about 1 mm on average, while deeper pockets of 6 mm or more see closer to 2 mm of reduction. That may sound modest, but even a millimeter or two can be the difference between a pocket that traps bacteria and one your body can manage.
Your dentist will typically schedule a re-evaluation four to six weeks after the procedure to measure your pockets again and check how your gums have responded. In some cases, pockets that haven’t improved enough may need additional treatment, including possible referral to a periodontist (a gum specialist).
Ongoing Maintenance After Treatment
A perio cleaning isn’t a one-time fix. Once you’ve had gum disease, you’re more susceptible to it returning. That’s where periodontal maintenance comes in. These follow-up cleanings go slightly below the gumline (unlike a standard prophylaxis) because your history makes you more prone to tartar buildup in those areas.
The American Academy of Periodontology recommends most patients with a history of gum disease start with cleanings every three months. This more frequent schedule significantly reduces the likelihood of the disease progressing compared to less frequent visits. Over time, your dentist may adjust the interval based on how well your gums are holding up, but many people with a periodontal history stay on a three- to four-month cycle long term rather than returning to the standard six-month schedule.
Risks to Be Aware Of
For most people, scaling and root planing is low-risk. The primary side effects are the temporary soreness and sensitivity already mentioned. One consideration worth knowing about: any dental procedure that causes gum bleeding can briefly allow mouth bacteria to enter the bloodstream, a condition called transient bacteremia. For the vast majority of people this is harmless and resolves on its own.
However, certain patients with heart conditions need preventive antibiotics before the procedure. The American Heart Association recommends this precaution for people with prosthetic heart valves, a history of endocarditis, specific congenital heart defects, or heart transplants. If any of these apply to you, your dentist and cardiologist will coordinate to prescribe antibiotics before your appointment. Poor oral hygiene itself has been linked to nearly an eightfold increase in the type of bacteremia associated with heart infection, which is one more reason treating gum disease matters beyond just saving your teeth.
Cost and Insurance Coverage
Because a perio cleaning is billed by quadrant rather than as a single whole-mouth procedure, costs add up differently than a regular cleaning. Most dental insurance plans cover scaling and root planing when pocket measurements justify it, though you may need prior authorization. The subsequent maintenance cleanings every three to four months are also typically covered, but your plan may have limits on how many cleanings it pays for per year. It’s worth checking whether your plan distinguishes between a “prophylaxis” code and a “periodontal maintenance” code, since they’re billed differently and some plans cap one but not the other.