MI Paste for Enamel Repair in Canada
Noticed chalky white spots after braces, sensitive zings in the cold, or early enamel wear from acids? You may have heard about MI Paste. Here’s a simple, Canada-focused guide to what it is, how it works, and how to use it safely—without replacing the basics that protect your smile every day.
What is MI Paste and does it repair enamel?
MI Paste is a dentist-dispensed cream with CPP-ACP that delivers calcium and phosphate to early enamel damage. It doesn’t replace fluoride, but it can reduce sensitivity and help reverse white spots when used nightly under a customized plan by dentists.
MI Paste 101: CPP-ACP in plain language
MI Paste contains casein phosphopeptide–amorphous calcium phosphate (CPP‑ACP). That sounds technical, but the idea is simple. It uses a milk-derived protein (casein) to carry calcium and phosphate—the same minerals your enamel needs—right to the tooth surface. In the right conditions, those minerals can help reharden areas that have started to soften.
How CPP-ACP works step by step
• The CPP holds calcium and phosphate in a bioavailable form.
• When the pH in your mouth rises after an acid event (like after eating or drinking), these minerals are released to enamel.
• Over time, this supports remineralization—especially in early, non-cavitated lesions and white spot areas.
Who in Canada might benefit most
• White spots after orthodontic treatment (those chalky patches where plaque lived around brackets).
• Mild acid wear and early enamel softening (seltzers, citrus, reflux). For deeper erosion, combine with prevention strategies for acid erosion and your dentist’s care plan.
• Tooth sensitivity from exposed dentin or early demineralization.
• Dry mouth (xerostomia) from medications, Sjögren’s, CPAP, or vaping—where saliva’s protective power is reduced.
• Early enamel changes in kids and teens with frequent snacking or sports drinks—always under guidance.
“Oral health is an essential part of overall health and well-being.” — Canadian Dental Association
MI Paste is not a fluoride replacement
Fluoride remains the backbone of cavity prevention because it helps form a stronger, more acid-resistant mineral (fluorapatite) at the enamel surface. Think of MI Paste as an add-on when your dentist sees early changes or sensitivity that could benefit from extra minerals. For most people, the best results come from pairing CPP-ACP with a fluoride plan. If you’re new to fluoride’s role, see how it protects enamel in our guide to fluoride in dental health.
MI Paste vs MI Paste Plus vs other options
• MI Paste (CPP‑ACP, no fluoride): Often used when fluoride exposure is already adequate or when dentists want to separate products for precise dosing.
• MI Paste Plus (CPP‑ACP + low-dose fluoride): Combines fluoride (about the level of many toothpastes) with CPP‑ACP for a one-step application when appropriate.
• Hydroxyapatite and fluoride toothpastes: Also support remineralization; your dentist may suggest one or the other—or a combo—based on your risk, age, and sensitivity.
Safety notes you should know
• Milk protein allergy: Avoid CPP‑ACP (it contains casein). Lactose intolerance is different; most MI Paste products are lactose-free, but true milk protein allergy is a no-go. Ask your dentist and check labels.
• Young children: Follow your dentist’s instructions for dose and frequency; watch swallowing.
• Pregnancy and breastfeeding: Generally considered safe, but check with your provider if you have allergies or concerns.
• Timing with acids: Don’t use right after a strongly acidic drink. First rinse with water, wait 20–30 minutes, then apply.
How to use MI Paste at home
Nightly routine (typical example—follow your dentist’s plan)
1) Brush with a fluoride toothpaste, then spit (don’t rinse) to leave a thin protective film.
2) Apply a pea-sized amount of MI Paste across the teeth with a clean finger or tray.
3) Let it sit for 3–5 minutes. Spit out excess—do not rinse.
4) Avoid eating or drinking for 30 minutes.
5) Use daily or as directed, usually for 8–12 weeks, then reassess.
Pro tip for braces or white spots
After debonding (brace removal), many Canadians see white spots where plaque collected near brackets. A nightly MI Paste routine, excellent hygiene, and low-acid habits can soften their look over weeks to months. If spots persist, your dentist may add microabrasion or targeted whitening.
What results to expect—and when
• Sensitivity often improves in 1–2 weeks.
• Early white spots may look less chalky over 6–12 weeks.
• Enamel wear from long-term acid exposure needs a full plan: diet changes, saliva support, and prevention. For a broader prevention roadmap, see ways to prevent tooth decay.
Does the science support MI Paste?
Clinical studies show CPP‑ACP can improve remineralization of early lesions and reduce sensitivity, especially when part of a dentist-guided program that also uses fluoride and diet changes. It’s not a cure-all, but it’s a helpful tool for the right cases. The World Health Organization notes oral diseases affect billions worldwide, with diet and hygiene patterns playing major roles—another reason to pair products with habits and professional care.
Diet and daily habits that boost results
• Space out sugars and acids (sodas, citrus, sports/energy drinks). Sip water after acidic items and wait before brushing.
• Choose tooth-friendly snacks (cheese, yogurt, nuts, crunchy vegetables).
• Manage dry mouth: water, sugar-free xylitol gum, humidification, check medications with your provider.
• Keep up with professional cleanings and exams, so your dentist can track progress and adjust.
When to talk to your dentist
• You see new white spots, sensitivity, or thin, translucent edges.
• You wear aligners or a night guard and notice dryness or plaque buildup.
• Your diet, reflux, or medications have changed, and teeth feel more sensitive.
• You have a history of frequent cavities or braces and want to protect your results.
Frequently paired with MI Paste
• Fluoride varnish in-office for high-risk areas.
• Custom trays for targeted delivery (sometimes helpful for white spots).
• Desensitizing toothpaste (e.g., potassium nitrate).
• Reflux and acid-erosion counseling; learn more about prevention in our article on acid erosion.
Conclusion
MI Paste can be a smart add-on in Canada for early enamel changes, white spots after braces, dry mouth, and sensitivity. It works best when it’s part of a plan: fluoride for everyday defense, lower-acid habits, and regular check-ins with your dental team. That mix—products plus coaching—helps your enamel recover and your smile stay strong.
FAQ
Is MI Paste safe if I’m lactose intolerant?
MI Paste contains casein (a milk protein), but usually no lactose. Lactose intolerance isn’t the same as a milk protein allergy. If you have a true milk protein allergy, avoid CPP‑ACP and ask your dentist for alternatives.
How long before I feel less sensitivity?
Many people notice improvement within 1–2 weeks of nightly use. Keep at it for 8–12 weeks, then reassess with your dentist. They may continue, pause, or adjust your plan based on progress.
Can MI Paste fix deep cavities?
No. MI Paste supports early remineralization and sensitivity relief. Cavitated decay needs dental treatment. Your dentist will decide if a filling, sealant, or other care is needed alongside remineralization.
Should I use MI Paste before or after brushing?
Brush with fluoride toothpaste first, spit (don’t rinse), then apply MI Paste. Waiting 20–30 minutes after acidic foods or drinks helps too.
Can kids use MI Paste?
Yes, when a dentist recommends it—especially for white spots or early changes. Dosing and supervision matter to prevent swallowing. Your dentist will tailor the plan by age and risk.
Do I still need fluoride if I use MI Paste?
In most cases, yes. Fluoride remains essential for daily enamel protection. MI Paste is typically an add-on. Your dentist will personalize how you combine them based on your risks and goals.
