Why might my dentist recommend a periodontist, and what would that specialist do that my dentist does not?

What a periodontist is

A periodontist is a dentist who has completed additional formal training in periodontics, one of the dental specialties recognized by the American Dental Association's National Commission on Recognition of Dental Specialties and Certifying Boards. The specialty covers the prevention, diagnosis and treatment of diseases of the tissues that support and surround the teeth, and of the structures that replace teeth, which is why periodontists are also involved with dental implants and the bone and gum around them.

Gum disease is common: nearly half of US adults aged 30 and older show signs of it, so general dentists diagnose and treat it every day. Many people with periodontitis are treated entirely in a general practice: a deep cleaning (scaling and root planing), home-care coaching, a re-evaluation, and then regular maintenance visits. A referral is not a sign that something went wrong. It usually means that your examination findings point toward treatment a specialist does more often, or toward a problem that has not responded as hoped.

What the examination findings mean

The decision rests on measurements, not on a rule of thumb. Your dentist or hygienist gathers several kinds of information; what the gum pocket numbers mean explains the first of these in more detail.

• Pocket depths. A thin probe measures the space between the gum and the tooth at several points around each tooth. Shallow, firm pockets are typical of health; deeper pockets suggest that attachment has been lost and that bacteria sit where a toothbrush and floss cannot reach.
• Bone loss on X-rays. Radiographs show how much of the bone that holds each tooth remains, and whether the loss is even or forms deep, angular defects around particular teeth.
• Bleeding on probing. Bleeding points to active inflammation. Bleeding that persists after treatment and good home care suggests the disease is not yet under control.
• Mobility and furcation involvement. Teeth that move, or molars where bone loss has exposed the area where the roots divide, are harder to clean and harder to stabilize.
• Staging and grading. Since 2017, periodontitis has been classified by stage (I to IV), which reflects how severe and how complex the disease is based on attachment loss, bone loss on X-rays, teeth lost to the disease, pocket depth, furcation involvement and mobility, and by grade (A to C), which estimates how fast it is likely to progress; smoking and diabetes can raise the grade.

Stage I and II disease is often managed in general practice. Stage III and IV disease, or a grade C pattern of rapid progression, is where a specialist conversation becomes common, because these patterns more often call for surgery, regeneration or long-term care shared between two offices. Gingivitis versus periodontitis explains the distinction that comes before staging.

Situations that commonly lead to a specialist conversation

None of these is an automatic referral, and a general dentist with the training and interest may manage some of them. They are the situations in which a periodontist is commonly involved.

• Advanced disease at diagnosis. Stage III or IV periodontitis, especially with deep angular bone defects, several loose teeth, or teeth already lost to the disease.
• Pockets that stay deep after the first phase of treatment. The usual sequence is scaling and root planing, a period of healing, then a re-evaluation. Sites that remain deep and bleed despite good home care are candidates for surgical access or regeneration.
• Rapid progression in a younger patient, or bone loss that seems out of proportion to the amount of plaque present.
• Furcation involvement on molars, which is difficult to clean and to treat without surgical access.
• Gum recession that needs root coverage, particularly where roots are sensitive or decay-prone, or where the recession is progressing. Do receding gums always need a graft? covers how that decision is made.
• Disease around a dental implant. Peri-implant mucositis (inflamed gum with no bone loss) can often be reversed with cleaning when caught early; peri-implantitis, where bone around the implant is being lost, is more complex to treat.
• A planned implant where bone or gum is thin. Rebuilding the ridge with grafting, or placing an implant close to the sinus or a nerve, may be referred. When does an implant need bone grafting first? explains the planning.
• A medical history that complicates gum treatment, such as poorly controlled diabetes, medications that affect the gums or bone, or a condition that affects healing.

A note on urgency: gum disease itself is usually slow. If you have facial swelling with fever, swelling spreading toward the eye or neck, bleeding that will not stop, or any trouble swallowing or breathing, that is a medical emergency; call 911 or go to the nearest emergency department rather than waiting for any dental appointment.

What a periodontist typically offers

The American Academy of Periodontology describes the procedures below. The point is not that a specialist does them better than every general dentist; it is that these are the procedures a periodontist is trained to do and does regularly.

• Non-surgical therapy and re-treatment. Scaling and root planing is the usual foundation of periodontitis treatment. The ADA's clinical guideline treats it as the first-line treatment and found that the various adjuncts (medicated chips, antibiotics, lasers and others) add at most a modest improvement, so a referral rarely means starting over with a different approach; it means a second look at the sites that did not respond.
• Pocket reduction surgery. The gum is lifted back so the root surfaces and bone defects can be cleaned directly, and the tissue is then placed to reduce the pocket so that maintenance becomes possible.
• Regenerative procedures. Bone grafts, membranes and tissue-stimulating proteins are used to encourage lost bone and attachment to re-form in selected defects.
• Soft tissue grafts. Gum tissue from the palate, or a donor material, is used to cover exposed roots or thicken thin gum.
• Implant-site procedures. Ridge modification (rebuilding jawbone that is too thin or short), sinus augmentation (adding bone beneath the sinus floor in the upper back jaw), and implant placement in sites that need bone or gum work first.
• Supportive periodontal care. After active treatment, maintenance visits are often shared between the specialist and the general dentist, with each office watching for different things.

Deep cleaning versus a routine cleaning explains the non-surgical step most patients go through before any of the above is discussed.

What changes the answer

• How you respond to the first phase. Many patients need no further active treatment after scaling and root planing and move straight to maintenance; the referral conversation usually happens at the re-evaluation, when any sites that did not respond become clear.
• Smoking and diabetes. Both are risk factors for periodontitis, and both can raise the grade in the 2017 system because they are associated with faster progression and slower healing. Someone who smokes may be referred sooner than a non-smoker with the same pocket depths.
• Your preferences. Some patients prefer that one office handle everything; others want the person who does a procedure most often to do it. Both are reasonable, and your dentist can explain the trade-offs for your situation.
• Access and logistics. A specialist may be some distance away, and the time and expense of a second office matter. Ask what can be done locally and what the consequences of waiting would be.
• Who does what in this practice. Gum grafting and computer-guided implant placement are among the services listed on this practice's website. Ask the office which periodontal procedures are provided here and in which situations a referral is suggested; the answer depends on your findings.

Questions to ask before a referral, and what to bring

Ask your dentist:

1. What stage and grade is my periodontitis, and which findings put it there?
2. Which teeth or sites are the concern, and what do you expect the periodontist to do about them?
3. What has already been done, and what is likely to happen if I wait?
4. Will you and the periodontist share my maintenance visits, and how will you communicate?
5. Which records will you send ahead (X-rays, pocket charts, medical history)?

Bring to the specialist appointment: your most recent full-mouth X-rays, your periodontal chart, a current list of medications, your medical history including how well any diabetes is controlled, and your questions in writing.

The next step

A referral conversation starts with a thorough periodontal examination: pocket measurements at every tooth, X-rays, and a review of your medical history and habits. If you have bleeding gums, loose teeth, receding gums, or have been told you have deep pockets, request an appointment for a periodontal evaluation. The examination determines whether treatment can begin here and whether a specialist conversation belongs in your plan.