A periodontist is a dentist who specializes in the gums, the bone surrounding your teeth, and the other structures that hold teeth in place. After completing four years of dental school, periodontists go through an additional three-year residency program with a minimum of 30 months of specialized instruction. That extra training makes them the go-to specialists for gum disease, dental implants, and surgical procedures involving the soft and hard tissues of your mouth.
What Periodontists Actually Treat
The core of a periodontist’s work is preventing, diagnosing, and treating periodontal disease, commonly called gum disease. This is not a rare problem. About 42% of American adults aged 30 and older have some form of periodontitis, and that number climbs to nearly 60% in adults 65 and older. Of those affected, roughly 8% have the severe form.
Periodontists also place and maintain dental implants, perform cosmetic gum procedures, and manage complex cases where bone loss threatens the survival of teeth. If your general dentist spots something beyond the scope of a routine cleaning or filling, a periodontist is typically the specialist you’ll be referred to.
How Gum Disease Gets Classified
Periodontists use a staging and grading system to assess how far gum disease has progressed and how quickly it’s moving. Staging (I through IV) captures how much damage has already occurred, while grading (A through C) estimates how fast the disease is advancing.
- Stage I: Mild. Small amounts of attachment loss between teeth, no tooth loss, and shallow pockets of 4 mm or less.
- Stage II: Moderate. More attachment loss, some bone involvement, but still no teeth lost to the disease. Pockets stay at 5 mm or under.
- Stage III: Severe. Significant bone loss extending into the middle third of the tooth root or deeper, pockets of 6 mm or more, and up to four teeth lost.
- Stage IV: Advanced. Five or more teeth lost, extensive bone damage, and complications like teeth drifting, loosening, or bite collapse. At this point, complex rehabilitation is usually needed.
Grading works alongside staging. Grade A means the disease is progressing slowly, with no measurable bone loss over five years. Grade B is moderate progression, less than 2 mm of loss over five years. Grade C is rapid, with 2 mm or more of loss in that same window. Smoking and diabetes both push a case toward a higher grade, which changes how aggressively the periodontist approaches treatment.
When You’d Be Referred to One
Your dentist checks pocket depth during routine exams by sliding a small probe between each tooth and the surrounding gum. Healthy pockets measure 1 to 3 mm. Pockets of 4 to 5 mm signal early gum disease. Once pockets reach 5 mm or deeper, they’re generally too deep to clean with standard tools, and that’s the point where a periodontist’s involvement becomes important. Pockets of 7 to 12 mm indicate advanced disease that almost certainly requires surgical intervention.
Beyond pocket depth, other signs that point toward a referral include gums that bleed regularly, receding gumlines, loose teeth, persistent bad breath that doesn’t respond to better hygiene, or bone loss visible on X-rays.
Nonsurgical Treatments
The first line of treatment for gum disease is often scaling and root planing, sometimes called a deep cleaning. It’s similar to a regular cleaning but goes much further beneath the gumline. During scaling, your periodontist uses hand instruments or ultrasonic tools to remove plaque and tartar from above and below the gums. Root planing then smooths the tooth roots, removing bacteria that cling to rough surfaces. Your toothbrush simply can’t reach these areas, which is why a deep cleaning is the only way to clear infection hiding at the base of your teeth.
For many patients with Stage I or Stage II disease, scaling and root planing combined with improved home care is enough to bring things under control. Your periodontist will typically schedule follow-up visits to re-measure pocket depths and track whether the gums are reattaching.
Surgical Procedures
When gum disease has progressed beyond what deep cleaning can fix, periodontists turn to surgery. The most common is pocket reduction surgery (also called osseous surgery). The goal is straightforward: reduce the depth of the pockets around your teeth so bacteria can no longer hide in them. During the procedure, gum tissue is folded back, infected material is removed, and irregular bone surfaces are smoothed or reshaped. If bone loss is significant, the periodontist may place bone grafts or membranes to encourage new bone growth.
Gum graft surgery addresses a different problem. When gum tissue has receded, exposing tooth roots, a graft adds thickness and volume back to the affected area. This is sometimes cosmetic, but it also protects exposed roots from decay and sensitivity. Once gum tissue is destroyed by periodontal disease, grafting is the only way to restore it.
Some periodontists now offer laser-based alternatives to traditional surgery. The most well-known is LANAP, an FDA-cleared procedure for moderate to severe gum disease. A thin laser fiber (about the width of a human hair) is inserted between the tooth and gum. The laser targets and removes bacteria and diseased tissue while leaving healthy tissue intact. The heat from the laser creates a blood clot that seals the pocket, encouraging the gum to reattach to the tooth root. Recovery is notably faster than conventional surgery, with most patients returning to normal activities within 48 hours. There’s no cutting or suturing involved.
Dental Implants
Periodontists are among the most qualified specialists to place dental implants because their training focuses specifically on the bone and soft tissue that implants depend on. An implant is a titanium post surgically placed into the jawbone, where it fuses with the bone over several months and serves as an anchor for a replacement tooth.
What sets a periodontist apart from other providers who place implants is their ability to manage the surrounding environment. When bone is too thin or too shallow to support an implant, a periodontist can perform bone grafting or a sinus lift to rebuild the site first. They also bring expertise in managing the gum tissue around implants, which matters for both aesthetics (especially with front teeth) and long-term survival of the implant. For patients with a history of gum disease, severe bone loss, or other health complications, this specialized knowledge reduces the risk of implant failure.
The Connection to Overall Health
Gum disease doesn’t stay contained in your mouth. Chronic inflammation in the gums can increase inflammatory markers throughout the bloodstream, and bacteria from infected pockets can enter the bloodstream and travel to other parts of the body. These two pathways help explain why periodontal disease has been significantly associated with cardiovascular disease, diabetes, Alzheimer’s disease and dementia, rheumatoid arthritis, and certain cancers.
The relationship with diabetes is particularly notable because it runs in both directions. Poorly controlled blood sugar makes gum disease worse, and active gum disease makes blood sugar harder to control. Smoking is another major risk factor: it accelerates the rate of gum disease progression and can push a case from a moderate grade to a rapid one.
It’s worth noting that these are associations, not proven cause-and-effect relationships. Gum disease and heart disease, for example, share many of the same risk factors. Still, managing periodontal health is increasingly recognized as one piece of managing your overall health.
Training and Board Certification
Every periodontist completes dental school before entering a residency program accredited by the Commission on Dental Accreditation. That residency lasts a minimum of three consecutive academic years and covers advanced surgical techniques, implant placement, bone and tissue regeneration, and the management of complex medical cases.
After residency, periodontists can pursue board certification through the American Board of Periodontology. This requires passing a written qualifying examination, followed by an in-person oral examination held in Raleigh, North Carolina. Candidates in their final year of residency can begin the process with their program director’s approval. Board certification isn’t required to practice, but it signals an additional level of verified expertise.