Hydroxyapatite
Pronunciation: (hy-DROX-ee-AP-uh-tyte).
- Generic name
- Hydroxyapatite
- Drug class
- Musculoskeletal & Connective Tissue
Availability and supply rules vary by country
Trade names by country:
Australia: · Full directory
What Hydroxyapatite is and how it works
Uses, formulations, monitoring, and supply rules can differ by patient, product, and country. Follow the exact local product information and professional advice.
Mechanism of action: how Hydroxyapatite works
Hydroxyapatite is a bioactive, biocompatible calcium phosphate mineral that mimics the natural mineral component of bone and dental enamel. In dental applications, it integrates into the enamel surface, filling micro-lesions and promoting remineralization. In bone grafting, hydroxyapatite serves as an osteoconductive scaffold, supporting new bone formation by providing a matrix for osteoblast attachment and proliferation. (1)
What Hydroxyapatite is used for
Bone regeneration and repair
Dental implant coatings
Bone void filling
Periodontal defect repair
Before taking Hydroxyapatite
Do not take / not appropriate for
- known hypersensitivity to calcium phosphate compounds and active infection at the intended site. (Contraindication) (2)
- Ensure proper aseptic technique during surgical implantation. (Contraindication) (2)
Tell your clinician about
(2) (3)How to take Hydroxyapatite
- General Instructions: Follow your dentist’s or surgeon’s instructions for use. For dental products, apply as directed (e.g., brushing, topical application). For bone grafts or surgical use, administration is performed by a healthcare professional.. Adult Dosing: Dental: Apply hydroxyapatite toothpaste or cream twice daily. Bone graft: Amount and frequency depend on surgical need and are determined by the surgeon.. Pediatric Dosing: Dental: Safe for children over 6 years; use a pea-sized amount of toothpaste or as directed by a dentist. Bone graft: Use only under specialist supervision.. Administration: For dental use, brush or apply directly to teeth/gums. For bone grafts, hydroxyapatite is implanted during surgery by a healthcare professional.. When To Stop: If you develop severe irritation, a possible allergic reaction, or signs of infection, seek medical advice promptly; let the clinician you see advise on whether to continue or stop using the product. For surgical/bone-graft use, follow post-operative instructions closely, and do not exceed the volume of material your surgeon intends to place in the defect.. Storage: Store at room temperature away from moisture and direct sunlight. Keep out of reach of children.
- This page does not provide a dose calculator. Dosing must follow the prescriber, pharmacist, or product label.
Procedures and treatment changes
Tell the treating team before surgery, procedures, or any medicine change. Do not alter treatment without the responsible clinician. (2) (3)
Missed dose
If you miss a dental application, use it as soon as you remember. If it is almost time for your next dose, skip the missed dose and continue your regular schedule. Do not double up.
Overdose
Overdose is unlikely with topical or graft use. If large amounts are ingested accidentally, especially by children, seek medical advice or contact Poison Control. (2) (3)
Side effects
Side effects and their urgency vary; report severe, persistent, or concerning symptoms to a healthcare professional.
Pain at injection site
Incidence: Reported in the clinician-authored database; frequency not established
Swelling at injection site
Incidence: Reported in the clinician-authored database; frequency not established
Redness at injection site
Incidence: Reported in the clinician-authored database; frequency not established
Infection
Incidence: Reported in the clinician-authored database; frequency not established
Allergic reaction
Incidence: Reported in the clinician-authored database; frequency not established
Nerve damage
Incidence: Reported in the clinician-authored database; frequency not established
Blood clot
Incidence: Reported in the clinician-authored database; frequency not established
Serious warnings
For external or surgical use only — serious
Symptoms: For external or surgical use only; do not ingest in large quantities. Not for use in patients with known hypersensitivity to calcium phosphate. Use with caution in patients with active oral or bone infections. Follow all post-operative care instructions after bone graft procedures. Keep all products out of reach of children.
Action: Follow the urgency stated and seek prompt or emergency care when indicated. (2) (3)
Contraindications recorded in the clinician database — serious
Symptoms: Contraindications recorded in the clinician database: Contraindications include known hypersensitivity to calcium phosphate compounds and active infection at the intended site. Use with caution in patients with impaired wound healing, compromised immune systems, or those at increased risk of infection. Ensure proper aseptic technique during surgical implantation.
Action: Follow the urgency stated and seek prompt or emergency care when indicated. (2) (3)
For bone-graft/orthopedic use — serious
Symptoms: For bone-graft/orthopedic use: hydroxyapatite bone void filler devices should not be implanted in patients with a pre-existing calcium metabolism disorder (such as hypercalcemia) except under specialist judgment. For injectable forms, the surgeon must avoid over-pressurizing the material during placement, since this can force the material beyond the intended site or, rarely, cause it to enter the bloodstream (embolization), which is a serious complication. The defect site should not be over-filled.
Action: Follow the urgency stated and seek prompt or emergency care when indicated. (2) (3)
Interactions
| Medicine or test | Effect | Action |
|---|---|---|
| Recorded interactions | Hydroxyapatite has minimal systemic absorption and is unlikely to interact with other medications. However, avoid concurrent use with other topical dental agents unless advised by your dentist. For bone graft use, inform your surgeon about all medications and supplements you are taking. | (1) |
Pregnancy, breastfeeding, kidney/liver function, age
Pregnancy
Pregnancy-specific safety data for hydroxyapatite dental products or bone-graft devices is not established in either the clinician database or the authoritative sources reviewed. Discuss use with your dentist, surgeon, or obstetric provider if you are pregnant. (2) (3)
Breastfeeding
Breastfeeding-specific safety data for hydroxyapatite dental products or bone-graft devices is not established in either the clinician database or the authoritative sources reviewed. Discuss use with your dentist, surgeon, or healthcare provider if you are breastfeeding. (2) (3)
Children
For dental products: the clinician database records these as generally safe for children over 6 years, using a pea-sized amount as directed by a dentist. Independent published research on hydroxyapatite in oral care notes that hydroxyapatite itself is non-toxic if swallowed (unlike fluoride), and has been studied specifically for young-child cavity prevention; the age-6 convention on a given product's own label may reflect general toothpaste-use guidance rather than an ingredient-specific limit, so always follow the specific product's own label and your dentist's advice. For bone-graft use in children: use only under specialist supervision; pediatric-specific device guidance was not found in the sources reviewed. (2) (3)
Renal_impairment
No specific renal or hepatic dose adjustment is established for hydroxyapatite (minimal systemic absorption). For bone-graft use, patients with a pre-existing disorder of calcium metabolism (such as hypercalcemia) should be evaluated by the treating surgeon before implantation, per FDA device guidance. (2) (3)
Hepatic_impairment
No specific renal or hepatic dose adjustment is established for hydroxyapatite (minimal systemic absorption). For bone-graft use, patients with a pre-existing disorder of calcium metabolism (such as hypercalcemia) should be evaluated by the treating surgeon before implantation, per FDA device guidance. (2) (3)
Monitoring
(2) (3)Storage
Store dental products (toothpaste, cream, varnish) at room temperature, away from moisture and direct sunlight, out of reach of children. Bone-graft devices are stored and handled per the specific manufacturer's sterile packaging instructions, which are followed by the surgical team.
Professional information
Clinician-facing context only. This section does not replace current product labeling.
General
Indication: Bone regeneration and repair
Dose summary: The typical amount used for hydroxyapatite as a bone graft substitute is determined by the specific clinical application and the volume required for the defect being treated; the defect site should not be over-filled, and injectable forms must not be over-pressurized during placement (risk of extrusion or embolization).
Renal context: No specific renal-impairment dose adjustment established; systemic absorption is minimal. FDA device guidance recommends evaluating patients with a pre-existing calcium metabolism disorder before implantation. (1) (3)
Frequently asked questions
What is hydroxyapatite used for in dentistry?
Hydroxyapatite is used to remineralize tooth enamel, reduce sensitivity, and prevent cavities. It is also used in dental surgeries as a bone graft material to support bone regeneration.
Is hydroxyapatite safe for children?
Yes, hydroxyapatite dental products are generally safe for children over 6 years old when used as directed. Always supervise children to prevent swallowing large amounts.
Can I use hydroxyapatite if I have sensitive teeth?
Yes, hydroxyapatite is often recommended for sensitive teeth as it helps to rebuild enamel and reduce sensitivity.
Are there any serious side effects?
Serious side effects are rare. Seek medical attention if you experience severe allergic reactions, persistent pain, swelling, or signs of infection.
How is hydroxyapatite used in bone surgery?
In bone surgery, hydroxyapatite is used as a graft material to fill bone defects or support bone healing. It acts as a scaffold for new bone growth and is gradually integrated into the body.
Can I use hydroxyapatite toothpaste with fluoride?
Yes, hydroxyapatite and fluoride can be used together, but consult your dentist for personalized recommendations.
What should I do if I accidentally swallow hydroxyapatite toothpaste?
Small amounts are generally safe if swallowed. If a large amount is ingested, especially by a child, seek medical advice.
What happens if I take too much Hydroxyapatite (dental, bone use)?
Overdosing on Hydroxyapatite, particularly in its bone graft or dental applications, is uncommon as it's typically administered by a professional. However, excessive systemic calcium intake from other sources alongside Hydroxyapatite could lead to hypercalcemia. Symptoms might include nausea, vomiting, and fatigue. If you suspect an overdose or experience unusual symptoms, seek emergency medical help immediately.
Can I drink alcohol while taking Hydroxyapatite (dental, bone use)?
As Hydroxyapatite is primarily used for localized dental remineralization or as a bone graft substitute, direct interactions with alcohol are generally not a primary concern. However, excessive alcohol consumption can negatively impact overall bone health and healing processes. It's always advisable to discuss alcohol intake with your healthcare provider, especially during recovery from bone or dental procedures.
Is Hydroxyapatite (dental, bone use) safe during pregnancy?
The pregnancy category for Hydroxyapatite is 'Consult doctor.' This means that its safety during pregnancy has not been definitively established, or there may be specific considerations depending on the application and individual patient circumstances. It is crucial to consult with your doctor or obstetrician to discuss the potential risks and benefits before using Hydroxyapatite while pregnant or breastfeeding.
What is the mechanism of action of Hydroxyapatite?
Hydroxyapatite is a bioactive, biocompatible calcium phosphate mineral that mimics the natural mineral component of bone and dental enamel. In dental applications, it integrates into the enamel surface, filling micro-lesions and promoting remineralization. In bone grafting, hydroxyapatite serves as an osteoconductive scaffold, supporting new bone formation by providing a matrix for osteoblast attachment and proliferation. (1)
What is the generic name of Hydroxyapatite?
The generic name is Hydroxyapatite.
What class of drug is Hydroxyapatite?
Hydroxyapatite is classed as: Musculoskeletal & Connective Tissue.
References
- Hydroxyapatite (dental, bone use) — clinician-authored medicine recordMedGuideGlobal · global · accessed 2026-08-06 · source 1
- Hydroxyapatite in Oral Care Products — A Review (PMC8432723)National Center for Biotechnology Information (NCBI), U.S. National Library of Medicine · United States · accessed 2026-08-06 · source 2
- Resorbable Calcium Salt Bone Void Filler Device — Class II Special Controls Guidance Document for Industry and FDA StaffU.S. Food and Drug Administration, Center for Devices and Radiological Health · United States · accessed 2026-08-06 · source 3
- DR. JEN SUPERPASTE NANO-HYDROXYAPATITE (SODIUM FLUORIDE) PASTE, DENTIFRICE [DR JEN NATURAL, LLC] — US prescribing information (DailyMed SPL)U.S. National Library of Medicine (DailyMed) · US · accessed 2026-08-14 · source 4
- Hydroxyapatite — RxNorm normalized drug concept (RXCUI 47628)U.S. National Library of Medicine (RxNorm) · US · accessed 2026-08-14 · source 5
Brand names by country
Single-ingredient Hydroxyapatite names are shown separately by country. Product availability, strengths, and supply rules can change; combination products are not included here.