What is hydroxyapatite toothpaste?

If you have seen hydroxyapatite toothpaste online, you may wonder how it works and whether it is right for your teeth. Hydroxyapatite is a mineral found naturally in enamel. Toothpaste uses small particles of it to support areas where enamel has started to lose minerals. Many formulas are fluoride-free, but products vary, and your cavity risk can help determine which toothpaste fits your needs. 

What you will learn in this article: 

• Hydroxyapatite is the main mineral found in tooth enamel. 

• Hydroxyapatite toothpaste may support early enamel repair and ease sensitivity. 

• Nano and micro formulas use different particle sizes, but one is not proven best for everyone. 

• Fluoride has a longer track record, so people with a higher cavity risk should ask a dental provider before switching. 

If you are unsure whether hydroxyapatite toothpaste belongs in your routine, schedule an appointment with an Aspen Dental provider. Your care team can check your teeth and help you choose a toothpaste that fits your needs. 

What is hydroxyapatite? 

Hydroxyapatite is a calcium-and-phosphate mineral. It is the main mineral in the enamel that covers your teeth. 

Hydroxyapatite toothpaste may contain micro- or nano-sized particles. These particles can attach to weakened enamel and cover tiny gaps in its surface.¹ This approach is called biomimetic because it uses a material that is similar to what is already found in your teeth. 

Nano vs. micro: does particle size matter? 

Nano particles are smaller than micro particles. Both forms are made to resemble the mineral crystals in enamel. 

The available research does not show that one size is always better for everyone. The amount of hydroxyapatite, the rest of the toothpaste formula and your own cavity risk may also matter. If you are unsure which type to choose, ask your dental provider. 

What does hydroxyapatite toothpaste actually do? 

Hydroxyapatite toothpaste is meant to support enamel during the early stages of mineral loss. Its particles may settle onto weakened areas and help restore the surface. It cannot fill a cavity or replace dental treatment once part of the tooth has been permanently damaged. 

It may also help with tooth sensitivity by covering tiny channels in the dentin beneath your enamel. In one clinical trial reviewed by the researchers, people using hydroxyapatite toothpaste had less sensitivity to a burst of air after two and four weeks than people using fluoride toothpaste. The overall findings are promising, but only a small number of randomized clinical trials were available.¹ 

How does the evidence compare with fluoride's track record? 

Fluoride has a longer and more established record for preventing cavities. The National Institute of Dental and Craniofacial Research explains that it can help replace minerals in enamel and stop or reverse tooth decay during its early stage.² 

Research on hydroxyapatite is promising, and some studies have reported results similar to fluoride. However, fewer clinical trials have been completed. That does not mean hydroxyapatite cannot help. It means dental providers have more long-term evidence for fluoride. You can also compare hydroxyapatite and fluoride toothpaste before discussing the choice with your dental provider. 

Who is at higher risk of cavities, and does that change your choice? 

Your cavity risk depends on factors such as recent tooth decay, severe dry mouth, eating habits and daily oral care. The American Dental Association says a cavity-risk assessment uses both your health history and a clinical exam. Recent cavities or restorations and severe dry mouth are among the signs that may place someone at higher risk.³ 

If your risk is higher, talk with your dental provider before switching away from fluoride toothpaste. Your dental provider can explain whether hydroxyapatite may fit your routine or whether fluoride protection is a better choice right now. 

Is hydroxyapatite toothpaste safe? 

Hydroxyapatite has a good safety record when toothpaste is used as directed. The review found no reported dental or whole-body harm from hydroxyapatite toothpaste. It also explains that realistic amounts of accidentally swallowed calcium phosphate break down into calcium and phosphate in the stomach.¹ 

Still, toothpaste formulas contain more than one ingredient. Follow the product label and stop using it if it irritates your mouth. 

Before choosing a toothpaste for a young child, ask their dental provider what type and amount to use. Supervise brushing and encourage your child to spit out the toothpaste. If a child swallows a large amount or feels sick afterward, contact their pediatrician or a poison control center. 

What else can help protect your enamel day to day? 

Toothpaste is only one part of protecting your enamel. Brush twice a day, clean between your teeth and limit frequent sugary or starchy snacks and drinks. Drinking water after meals can also help wash away food and acids. 

If you want to know whether cavities can be prevented without fluoride, ask your dental provider how your cavity risk affects the answer. Before trying another alternative, learn whether charcoal toothpaste is safe and why making homemade fluoride-free toothpaste may not give your teeth the protection they need. 

You do not have to guess about what your enamel needs. Reach out to your dental provider to review your cavity risk and discuss whether hydroxyapatite toothpaste fits your care plan. 

What is hydroxyapatite toothpaste? FAQs 

Still deciding about hydroxyapatite toothpaste? These answers cover a few common questions. 

Can hydroxyapatite toothpaste replace fluoride completely? 

Not for everyone. Hydroxyapatite research is promising, but fluoride has a longer track record. Your dental provider can help you choose, especially if you have frequent cavities, severe dry mouth or another reason for a higher cavity risk. 

How long does it take to see a benefit? 

There is no single timeline that applies to everyone. Some people may notice less sensitivity within a few weeks, but enamel protection is an ongoing process that you may not be able to feel. Ask your dental provider to check your teeth if you want to know whether your routine is working. 

Is hydroxyapatite toothpaste good for sensitive teeth? 

It may help some people by covering tiny channels in the dentin beneath the enamel. However, sensitivity can also come from a cavity, cracked tooth or another problem. See your dental provider if sensitivity is new, getting worse or does not improve. 

Can children use hydroxyapatite toothpaste? 

Some hydroxyapatite toothpastes are made for children, but formulas vary. Ask your child’s dental provider which toothpaste and amount are right for their age and cavity risk. Follow the label and supervise brushing. 

Does hydroxyapatite toothpaste cost more than fluoride toothpaste? 

Prices vary by brand, store and tube size. When comparing products, look at the active ingredients and amount of toothpaste instead of only the price. Your dental provider may also be able to suggest options that fit your needs and budget. 

Sources 

¹ National Institutes of Health, Odontology: “The use of hydroxyapatite toothpaste to prevent dental caries.” https://pmc.ncbi.nlm.nih.gov/articles/PMC8930857/ 

² National Institute of Dental and Craniofacial Research: “The Tooth Decay Process: How to Reverse It and Avoid a Cavity.” https://www.nidcr.nih.gov/health-info/tooth-decay/more-info/tooth-decay-process 

³ American Dental Association, ADA Library and Archives: “Caries Risk Assessment and Management.” https://www.ada.org/resources/ada-library/oral-health-topics/caries-risk-assessment-and-management