Interview with Dr. Miles Madison, Board-Certified Periodontist and Oral Microbiome Expert

Table of Contents

• Quick overview
• About this interview
• Everyday oral care: toothpaste, brushing, and coffee
• Understanding the oral microbiome
• Practical, evidence-based treatments and daily habits
• Tools, appliances, and devices
• Gum recession, gum disease, and long-term risk
• Life stages and oral health: puberty, pregnancy, and menopause
• Emerging science: oral microbiome and the brain
• Simple daily habits that make the biggest difference
• Practical product notes and clinician tips
• How specialists and primary care can work together
• Final practical checklist: a one-week plan to reset oral health
• Where to find more guidance
• FAQ
• Wrapping up

Quick overview

Dr. Thais Aliabadi and Mary Alice Haney spoke with Dr. Miles Madison, a board-certified periodontist who specializes in periodontal therapy, dental implants, and personalized microbiome-based care. His clinical focus is on the tissues that surround and support the teeth: gums, bone, and the biofilms that live on oral surfaces. This conversation unpacks what a periodontist does, how the oral microbiome influences whole-body health, and practical, evidence-backed actions anyone can take to prevent bad breath, gum disease, and enamel loss.

About this interview

We used a clear question-and-answer format so you can quickly find the practical steps that matter most: which toothpaste to choose, how and when to brush, whether mouthwash helps or harms, when to test your saliva, and how life stages like puberty, pregnancy, and menopause change oral risk.

What is a periodontist, and how is that different from a general dentist?

A periodontist completes dental school, and then additional specialized training focused on the tissues around teeth: gums, jawbone, and the structures that hold teeth in place. Periodontists perform advanced surgical procedures such as gum grafting, bone reconstruction, and dental implant placement. While every periodontist starts as a general dentist, the specialty focuses on diagnosis and management of periodontal disease and on replacing or reconstructing lost oral structures.

Why does it matter who places an implant?

Most dental implants are placed by periodontists or oral and maxillofacial surgeons. Periodontists are trained in evaluating bone volume, preparing the jaw with grafts when necessary, and performing precise surgical implant placement. If you have congenitally missing teeth, trauma, or bone loss, seeing a specialist gives you access to the reconstructive skills needed for a long-lasting result.

Everyday oral care: toothpaste, brushing, and coffee

Which toothpaste should we use?

The best toothpaste depends on your specific needs.

• Cavity-prone people: Use a fluoride toothpaste. Fluoride remains the most effective ingredient for preventing and remineralizing early cavities.
• Daily use: Pick a low-abrasive formula. Many whitening toothpastes are abrasive and remove enamel over time while only superficially reducing stains.
• Gingivitis or early gum inflammation: Consider a toothpaste with stannous fluoride (for example, formulations marketed for gum health). Use these short-term products to control inflammation and then return to a regular low-abrasive fluoride paste once the issue is resolved.

Practical picks Dr. Madison likes: broad, effective, low-abrasive options such as basic cavity-protection toothpastes (Colgate or Crest), and if you want a premium flavor profile, specialty brands like Marvis. For gingival issues, look for stannous fluoride products such as Parodontax or certain oral care pro-health formulas.

Do we brush before or after coffee?

Brush when you wake up before breakfast and before coffee. Coffee is acidic and temporarily weakens enamel. If you do brush after coffee, wait roughly 30 minutes to allow saliva to partially neutralize acids and re-harden the enamel surface, then brush gently.

When is it safe to whiten a young person’s teeth?

Avoid whitening until adult teeth are fully erupted and development is nearly complete. Generally, hold off until age 16 to 17. Professional whitening done with dental supervision is safest when treating a younger patient.

Understanding the oral microbiome

What is the oral microbiome, and why does it matter?

The mouth is the start of the digestive tract and hosts a complex community of roughly 700 bacterial species. Only a small fraction is clearly pathogenic. Most species help digestion, protect against harmful invaders, and even participate in generating compounds like nitric oxide, which supports cardiovascular health.

A balanced community, a eubiotic oral microbiome keeps cavities, bad breath, and gum disease in check. When the balance shifts toward disease-causing species—what we call dysbiosis—local problems (like cavities or periodontitis) arise, and certain bacteria can also contribute to systemic inflammation and disease.

Which bacteria are the troublemakers?

Different bacteria cause different problems:

• Cavities: Streptococcus mutans and similar acid-producing species.
• Gum disease: A group of anaerobic pathogens including P. gingivalis and Fusobacterium nucleatum. These are highly inflammatory and have been associated with systemic conditions.

These organisms form biofilms—protective blankets that make them resistant to simple rinses and harder for antibiotics to penetrate.

Can we test the oral microbiome?

Yes. Salivary microbiome profiling is now accessible and typically requires only a spit sample. Comprehensive tests identify the full makeup of your oral bacterial community, allowing clinicians to assess the ratio of protective to pathogenic species and to link specific bacteria to risks like cavities, gum disease, bad breath, or even potential gut-related associations.

Important notes about testing:

• Home kits exist, but interpretation matters. Work with an experienced clinician who will recommend targeted treatment.
• After treatment, repeat testing (commonly at three months) helps confirm whether the bacterial balance has shifted toward health.

How do we change a harmful oral microbiome?

The approach is targeted and staged:

1. Disrupt biofilm with professional cleaning or procedures so therapeutics can reach bacteria.
2. Apply local antiseptics, specific mouthwashes, or targeted antibiotics if needed.
3. Use adjuncts such as xylitol to selectively interfere with cavity-causing bacteria.
4. Support recolonization of beneficial species through oral-specific probiotics and prebiotic foods.

Changes are most successful when driven by clinician-guided therapy rather than DIY measures alone.

Practical, evidence-based treatments and daily habits

What is scaling and root planing (deep cleaning), and when is it needed?

Scaling and root planing is a non-surgical, thorough cleaning below the gumline. Think of it as a detail service for your mouth: it removes bacterial calculus, disrupts biofilm, and smooths root surfaces so tissues can heal. Early-stage gum disease responds well to this approach. Advanced disease may require surgical intervention to remove infected tissue and, in some cases, augment lost bone.

When is surgery or regenerative treatment necessary?

If bone and soft tissue loss are significant, surgical therapy can:

• Clean infected pockets thoroughly.
• Reconstruct lost bone (grafting) where needed to stabilize teeth.
• Place implants to replace missing teeth when appropriate.

After care and maintenance are critical: periodontal disease is typically controlled rather than cured, and frequent professional maintenance—commonly every three months—is the key to long-term success.

How does tongue hygiene help bad breath?

The back of the tongue is a common reservoir for odor-producing bacteria. Tongue scraping removes surface biofilm and volatile sulfur compound-producing bacteria. Use a dedicated scraper and reach as far back as you comfortably can (without gagging). Scrape in the morning and optionally before bed. Pair scraping with targeted mouthwashes that neutralize sulfur compounds to control persistent halitosis.

Which mouthwashes help and which hurt?

Key rules for selecting a mouthwash:

• Avoid alcohol-based/hard-spectrum antiseptics for routine daily use: They wipe out both helpful and harmful species and can shift the microbiome toward disease.
• Choose alkaline, not highly acidic formulas: Acidic rinses may erode enamel or disrupt beneficial microbes for shelf life reasons.
• Look for active ingredients tailored to the problem: For bad breath, look for zinc or chlorine dioxide; for biofilm disruption, some specialized formulas include nano-silver or agents that chemically affect the biofilm matrix.

Use mouthwash as an adjunct, not a replacement for mechanical cleaning. If you use a therapeutic mouthwash at night, make it the final step so its active ingredients can stay in contact with oral surfaces while you sleep.

What about xylitol? Is it safe and effective?

Xylitol is a sugar alcohol that interferes with cavity-causing bacteria’s metabolism. Regular use of xylitol mints or chewing gum (two to three times per day) can lower cavities significantly. Recommended ingestion is around six grams per day; dosing varies by product.

A few cautions:

• Some sugar alcohols, like erythritol, have been investigated for cardiovascular effects related to platelet stickiness. If you have clotting disorders, discuss with your provider.
• Oral xylitol is safe for most patients, including many pregnant people and children, but always follow dosing instructions and speak with your clinician if you have concerns.

Tools, appliances, and devices

Electric toothbrushes vs manual brushes

Studies show rechargeable electric brushes clean more effectively and promote a healthier oral microbiome compared with manual brushing. Not all electric brushes are equal: prefer rechargeable models with consistent oscillation/rotation rather than battery-powered vibrators. With an electric brush, let the brush head rest on each tooth surface and allow the device to do the work—avoid heavy scrubbing, which can cause abrasion and recession.

Flossing versus water flossers

Choose the tool to match the problem:

• Cavity-prone patients: Traditional floss removes interproximal plaque and debris best.
• Gum-disease-prone patients or those with implants: Water flossers flush under the gums and into pockets, reducing harmful bacteria and shifting the microbiome toward beneficial species.
• If both issues exist: Use both techniques when possible; start with whichever you will actually do consistently.

Cleaning night guards, Invisalign trays, and mouth appliances

The best method for small appliances like aligner trays or night guards is antiseptic soap and water. Toothpaste can leave residues and make clear trays look frosty. For nightly guards used every night, occasional soaking or a cleaning machine may help, but soap and a gentle brush or tablet cleaner are usually enough.

Gum recession, gum disease, and long-term risk

Is gum recession the same as gum disease?

No. Most recession is mechanical caused by aggressive brushing or using a medium-bristle brush. Recession exposes root surfaces, and once lost, it does not regrow on their own. Claims that over-the-counter kits will “bring gums back” are unsupported. The reliable treatment for significant recession is a gum graft using tissue—often from the palate—performed by a trained periodontal surgeon.

What is periodontitis, and why should we worry?

Periodontitis is an inflammatory disease triggered by pathogenic bacteria. The immune response to these bacteria damages bone and soft tissue supporting teeth. Inflammation opens the door for bacteria to enter the bloodstream and potentially affect distant organs. Associations have been found between periodontal pathogens and adverse pregnancy outcomes, rheumatoid arthritis, and emerging data suggest links with cognitive decline and Alzheimer’s disease.

Which bacteria are linked to systemic disease?

P. gingivalis is a commonly implicated pathogen. It produces enzymes that can alter host proteins, potentially triggering immune reactions. Fusobacterium nucleatum has been associated with colorectal cancer in observational research. While causality is not proven in many cases, these associations show how oral health can matter beyond the mouth.

How do we detect gum disease early if it has few symptoms?

Gum disease is often silent. Early warning signs can include bleeding gums during brushing or flossing, persistent bad breath, and gum tenderness. Because symptoms can be subtle or absent, clinical exams and microbiome testing offer actionable detection. Once the disease is identified, regular three-month maintenance cleanings are central to long-term control.

Life stages and oral health: puberty, pregnancy, and menopause

How do hormones affect oral health?

Hormonal fluctuations across life stages influence oral microbiome composition and the immune response in gums.

• Puberty: Hormone surges can favor bacteria that increase gum inflammation. This is a good time to emphasize flossing and regular cleanings.
• Menstruation and the menstrual cycle: Some women notice periodic flare-ups of gingival sensitivity or canker sores associated with hormonal changes.
• Pregnancy: Pregnancy gingivitis is common: up to 70% of women may experience increased gum inflammation. In rare cases, pregnancy tumors (localized, benign overgrowths) can occur. Morning sickness and reflux further increase acid exposure and caries risk. Dental care is safe during pregnancy and recommended more frequently.
• Perimenopause and menopause: Reduced salivary flow causes dry mouth and increases the risk of cavities and gum disease. Xerostomia decreases saliva’s buffering and antimicrobial properties, so preventive steps become more important.

What to do about dry mouth?

Dry mouth management includes:

• Staying well hydrated and sipping water throughout the day.
• Using xylitol mints or oral rinses to stimulate saliva and reduce bacteria that cause cavities.
• Visiting the dentist more frequently for fluoride treatments and monitoring—often every three months rather than once or twice per year.

Many medications cause dry mouth (SSRIs, certain ADHD medications, antihistamines). If you start new medications, consider discussing oral side effects with the prescriber and plan for intensified preventive oral care.

Emerging science: oral microbiome and the brain

Is there a mouth-brain connection?

Recent studies have found periodontal pathogens in the brains of people with Alzheimer’s disease and reported associations between poor oral hygiene and cognitive decline. P. gingivalis is one organism of interest because it can access systemic circulation and has properties that might influence neuroinflammation. While definitive causation has not been established, systemic inflammation is a recognized risk factor for many chronic conditions, and controlling oral inflammation is a low-risk preventive strategy.

Simple daily habits that make the biggest difference

If someone adopts only one new habit today, what should it be?

Brush for two minutes before bedtime. This is more important than morning brushing because your mouth dries while you sleep, and bacteria flourish overnight. Pair bedtime brushing with flossing or a water flosser so you remove interproximal plaque that brushing alone misses.

Other highly impactful habits

• Floss daily; consider water flossing if you have implants, periodontal pockets, or tend to get gum disease.
• Use a low-abrasive fluoride toothpaste daily; use stannous fluoride formulations short-term for gingivitis treatment when directed by your clinician.
• Tongue scrape daily in the morning and optionally before bed.
• Limit abrasive whitening pastes for daily use; reserve whitening strips or professional whitening for occasional use under guidance.
• See your dental specialist if you have frequent bleeding, persistent bad breath, or do not know where to start—periodontal problems are much easier to control when found early.

Practical product notes and clinician tips

We avoid product pushes, but for everyday shopping, keep these simple rules in mind:

• Choose a fluoride toothpaste that specifically lists fluoride on the label and check the abrasive rating if available.
• Avoid daily alcohol-containing mouthwashes that claim broad-spectrum germ killing for routine use.
• If you have chronic halitosis, look for rinses with zinc or chlorine dioxide and combine that with tongue scraping and a clinical exam.
• When picking an electric toothbrush, favor rechargeable, clinically tested models and learn to let the brush head rest on each tooth rather than scrubbing aggressively.

How specialists and primary care can work together

Medical training often lacks dental education. We recommend that physicians and other non-dental clinicians recognize oral health’s role in systemic disease and refer patients with bleeding gums, persistent bad breath, unexplained systemic inflammation, or pregnancy-related oral changes to dental specialists. Collaboration improves patient outcomes and can reduce risk for associated conditions.

Final practical checklist: a one-week plan to reset oral health

1. Night 1: Begin brushing for two minutes at night with a low-abrasive fluoride toothpaste. Floss before brushing.
2. Day 2: Start morning tongue scraping. Use a gentle scraper and rinse afterward.
3. Day 3: If you are cavity-prone, add xylitol mints after meals (target up to 6 g/day). If you have clotting concerns, check with your doctor first.
4. Day 4: Swap to a rechargeable electric toothbrush and practice letting the brush do the work on each tooth surface.
5. Day 5: Replace alcohol mouthwash with a targeted rinse if needed for bad breath (zinc or chlorine dioxide) and use it as the last step at night.
6. Day 6: If you have frequent bleeding or chronic bad breath, schedule a periodontal evaluation and consider salivary microbiome testing.
7. Day 7: Plan to maintain these habits and book a cleaning and periodontal assessment if you have risk factors or symptoms.

Where to find more guidance

If you have complex issues—implant maintenance, recurring pockets, chronic halitosis, or signs of systemic involvement—consult a periodontist. Microbiome testing and targeted therapies are powerful but require professional interpretation and follow-through for the best outcomes.

FAQs

What is the single most important oral care habit?

Brush for two minutes before bedtime and floss daily. Nighttime cleaning prevents overnight bacterial growth and is more impactful than morning brushing alone.

Are whitening toothpastes safe for daily use?

Most whitening toothpastes are abrasive and can wear enamel with long-term daily use. Reserve them for occasional use and prefer low-abrasive fluoride toothpastes for everyday care.

Can mouthwash damage my oral microbiome?

Alcoholic and high-essential-oil mouthwashes can indiscriminately reduce both beneficial and harmful bacteria and are not recommended for daily use. Use targeted, less aggressive rinses as adjuncts based on need.

How often should I see a periodontal specialist if I have gum disease?

Following active treatment, three-month maintenance visits are often recommended to keep periodontal disease under control. For healthy mouths, routine cleanings every six months are typical, though frequency should be individualized.

Do oral probiotics work?

Oral-specific probiotics can help if used consistently over time. They are most effective as part of a broader, clinician-guided plan that includes mechanical disruption of biofilm and targeted therapies.

Does gum disease increase risk for other health problems?

Yes. Periodontal pathogens and resulting inflammation have been associated with adverse pregnancy outcomes, rheumatoid arthritis, and emerging links to cardiovascular and neurodegenerative disease. Controlling oral inflammation reduces systemic inflammatory burden.

Is tongue scraping necessary every day?

Yes. Scraping the tongue in the morning and optionally at night reduces volatile sulfur compounds and bacterial reservoirs that cause bad breath and contribute to better overall oral hygiene.

Wrapping up

Our mouths are ecosystems. A few consistent, evidence-based habits—gentle twice-daily brushing with fluoride, daily flossing or water flossing, tongue scraping, targeted use of xylitol, and regular professional care—go a long way in preventing the most common oral problems. When issues arise, microbiome testing and targeted periodontal therapy allow for precision care rather than guesswork. Maintain habits, ask for help when something feels off, and collaborate with dental specialists when needed.

This article was created from the video Dr. Madison’s Mouth Manual: How to Fix Bad Breath, Heal Gums & Choose the Right Toothpaste | SHE MD for Dr. Thais Aliabadi’s website.