Can You Use Toothpaste to Clean Clear Aligners?

Last Updated: July 2026
Estimated Reading Time: 8 minutes

The Short Answer

Yes, you can clean clear aligners with toothpaste, but it may not always be the best choice depending on your goals.

Many people assume toothpaste is the obvious solution for cleaning aligners because it works well for cleaning teeth. However, clear aligners and teeth are made from very different materials, and the way a cleaning method affects teeth may not be the same as how it affects orthodontic plastics.

Current research does not support a simple "toothpaste is always bad" or "toothpaste is always safe" conclusion. Studies evaluating aligner cleaning methods have found differences in areas such as:

• Color stability

• Surface characteristics

• Material changes

• Cleaning effectiveness

Different methods may perform better depending on what is being measured.

This article reviews what the research says, what manufacturers recommend, and how toothpaste compares with other common aligner cleaning methods.

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Key Takeaways

• Toothpaste is designed to clean tooth enamel, not clear aligners.

• Most toothpastes contain abrasive ingredients that help remove plaque and surface stains from teeth.

• Clear aligners are made from transparent thermoplastic materials that have different properties than tooth enamel.

• Research comparing cleaning methods has found tradeoffs between discoloration, surface changes, and cleaning performance.

• No single cleaning method has been proven to be the best across every category.

• Patients should follow the cleaning recommendations provided by their orthodontist and aligner manufacturer.

Why the Answer Isn't Simply "Yes" or "No"

If you search online for "Can I clean Invisalign with toothpaste?", you will find many articles that recommend avoiding toothpaste because it may scratch aligners.

While this advice is common, the scientific evidence is more complex.

Researchers have studied multiple cleaning methods, including:

• Toothpaste

• Cleaning crystals

• Effervescent cleaning tablets

• Liquid soaps

• Other cleaning solutions

These studies do not always measure the same thing. Some focus on:

• Whether aligners become discolored

• Whether the surface becomes rougher

• Whether bacteria are removed

• Whether the material properties change

A cleaning method that performs well in one category may not perform best in another.

For example, a randomized crossover clinical trial published in Progress in Orthodontics evaluated multiple cleaning methods for Invisalign aligners. The study found that colorant-free liquid soap resulted in minimal color change, while some other cleaning methods produced greater discoloration. However, different methods showed different effects on surface characteristics. The authors emphasized that additional long-term research is needed before establishing definitive cleaning guidelines.

The important takeaway is:

Aligner cleaning is a balance between maintaining appearance, preserving material properties, and effectively removing buildup.

What Does Research Say About Toothpaste?

Toothpaste has been studied as one of many methods used by aligner wearers.

A common concern is that toothpaste contains abrasive particles that may affect the surface of clear aligners.

However, research does not suggest that every toothpaste will affect aligners in the same way.

Factors that may influence the outcome include:

• Toothpaste formulation

• Type and concentration of abrasive particles

• Brushing technique

• Brushing frequency

• Type of aligner material

• Duration of use

A randomized crossover clinical trial found that conventional toothpaste performed differently depending on the property being measured. While toothpaste was associated with greater discoloration compared with some methods, it also preserved surface morphology relatively well in that study.

This demonstrates why evaluating only one factor can be misleading.

What Makes Toothpaste Clean Your Teeth?

Toothpaste is not simply a soap for your teeth. It contains several ingredients designed to improve oral hygiene.

Common toothpaste ingredients include:

• Fluoride for strengthening enamel

• Humectants to maintain texture

• Surfactants to help distribute ingredients

• Flavoring agents

• Abrasive particles for cleaning

The abrasive system is responsible for much of toothpaste's ability to remove surface stains.

Common toothpaste abrasives include:

• Hydrated silica

• Calcium carbonate

• Dicalcium phosphate

• Other mineral-based polishing agents

These particles help remove plaque and stains through mechanical action when combined with brushing.

Why Doesn't Toothpaste Damage Teeth?

If toothpaste contains abrasives, why is it safe to brush your teeth every day?

The answer comes down to material properties.

Human enamel is an extremely hard biological material designed to withstand years of chewing and exposure. Toothpaste abrasives are formulated to remove deposits while minimizing unwanted wear on enamel during normal brushing.

Clear aligners, however, are made from transparent polymers designed for flexibility, comfort, and orthodontic movement.

Because aligner materials and teeth have different properties, a cleaning method that is appropriate for teeth may not have the same effect on aligners.

What Are Clear Aligners Made Of?

Clear aligners are manufactured from specialized thermoplastic materials.

Depending on the manufacturer, materials may include:

• Polyurethane-based polymers

• PETG (polyethylene terephthalate glycol)

• Copolyester materials

• Proprietary multilayer polymers

These materials are selected because they provide:

• Transparency

• Elasticity

• Strength

• Comfort during wear

However, like all plastics, they can be affected by environmental factors such as:

• Temperature

• Chemical exposure

• Mechanical abrasion

• Time

This is why cleaning recommendations for aligners differ from recommendations for natural teeth.

What Do Manufacturers Recommend?

Most aligner manufacturers recommend cleaning aligners using methods specifically intended for orthodontic appliances.

Common recommendations include:

• Rinsing aligners regularly with cool or lukewarm water

• Cleaning aligners daily

• Using products designed for removable orthodontic appliances

• Avoiding hot water, which may affect the plastic

• Avoiding harsh chemicals

Patients should follow the specific instructions provided by their orthodontist and aligner manufacturer because recommendations may vary.

Comparing Common Cleaning Methods

Toothpaste

Advantages:

• Easily available

• Convenient

• Effective for removing some surface debris

Considerations:

• Toothpaste formulations vary widely

• Some contain abrasives designed for teeth

• May affect aligner appearance depending on formulation and usage

Cleaning Tablets

Advantages:

• Designed specifically for removable appliances

• Convenient soaking method

• Can help loosen buildup

Considerations:

• Different products contain different active ingredients

• Some studies have found effects on color or surface characteristics

Liquid Soap

Advantages:

• Some studies have shown favorable effects on color stability

• Inexpensive and accessible

Considerations:

• Must be free of dyes and harsh ingredients

• Should be rinsed thoroughly before wearing aligners

• Very manual process. Brushing aligners multiple times a day can consume a lot of time.

Ultrasonic Cleaning

Ultrasonic cleaners use high-frequency sound waves in a cleaning solution to help remove debris from removable appliances.

Potential benefits include:

• Cleaning hard-to-reach areas

• Simple daily routine

• Reduced manual brushing

However, results depend on factors such as:

• Cleaning solution used

• Ultrasonic device parameters

• Cleaning time

• Aligners being cleaned

More research is needed to determine the optimal ultrasonic cleaning approach for all aligner materials.

Practical Recommendations

Based on current evidence:

1. Clean your aligners every day

A consistent routine is more important than finding a "perfect" method.

2. Avoid exposing aligners to extreme temperatures

Hot water can affect thermoplastic materials.

3. Consider the tradeoffs of each cleaning method

Different methods may affect:

• Appearance

• Surface properties

• Convenience

4. Follow your orthodontist's recommendations

Your orthodontist understands your specific treatment and aligner system.

5. Build a routine you can maintain

The best cleaning method is one you will consistently use.

Frequently Asked Questions

Can I use whitening toothpaste on clear aligners?

Whitening toothpastes often contain additional polishing ingredients intended to remove surface stains. Because formulations vary, patients should consider their aligner manufacturer's recommendations before using them regularly.

Can toothpaste make aligners cloudy?

Some cleaning methods may affect aligner appearance over time. The effect depends on the toothpaste formulation, cleaning technique, and aligner material.

What is the best way to clean Invisalign aligners?

There is currently no single cleaning method proven to be superior in every category. The best approach is a consistent routine using a method compatible with your aligner manufacturer's recommendations.

Should I brush my aligners?

Many patients gently brush their aligners as part of their cleaning routine. However, excessive force or inappropriate cleaning products may affect aligner appearance over time.

Final Thoughts

Cleaning clear aligners seems simple, but the science behind it is more complicated than many people realize.

Toothpaste is not automatically harmful, but it is also not specifically designed for orthodontic plastics. Research shows that different cleaning methods involve tradeoffs between appearance, surface properties, and convenience.

The most important factor is developing a consistent cleaning routine that helps maintain your aligners throughout treatment.

At Lumalign, our goal is to make aligner care easier by combining evidence-based education with practical daily cleaning solutions.

References

1. Progress in Orthodontics. Clinical evaluation of the effects of different cleaning agents on Invisalign clear aligners: effects on color stability and surface characteristics.

2. Align Technology. Invisalign® aligner cleaning and care recommendations.

3. American Association of Orthodontists. Patient resources for orthodontic appliance care.

4. Studies evaluating thermoplastic materials used in clear aligner therapy and their response to cleaning methods.

5. American Dental Association. Toothpaste ingredients and abrasive systems.