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Calcium Hydroxyapatite for Gingival Phenotype Enhancement: A Translational Review and Clinical Decision-Making
1Periodontology, Independent Research, Beirut, LBN.
Cureus
|August 15, 2026
Summary
Calcium hydroxyapatite (CaHA) shows promise for periodontal soft-tissue management by stimulating collagen production and reinforcing tissues. While effective in other fields, its use in periodontology is experimental and requires further clinical validation.
Area of Science:
- Periodontology
- Biomaterials Science
- Regenerative Medicine
Background:
- Soft-tissue deficiencies, such as interdental papilla loss and thin gingival phenotypes, present significant challenges in periodontology.
- Hyaluronic acid fillers offer temporary volume but lack sustained tissue reinforcement.
- Calcium hydroxyapatite (CaHA) is a biostimulatory injectable biomaterial with potential for extracellular matrix remodeling and sustained soft-tissue enhancement.
Purpose of the Study:
- To review the biological rationale and existing evidence for calcium hydroxyapatite (CaHA) in periodontal soft-tissue management.
- To evaluate the potential role of CaHA in addressing gingival soft-tissue deficiencies.
Main Methods:
- A narrative review was conducted following SANRA guidelines.
- A comprehensive literature search was performed on PubMed, Scopus, and Google Scholar for studies from 2020-2025 on injectable CaHA in soft-tissue applications.
- Evidence from dermatology, aesthetic medicine, biomaterials, and histology was synthesized to assess CaHA's biological mechanisms and tissue responses.
Main Results:
- CaHA exhibits a dual mechanism: immediate volumization and delayed biostimulation via fibroblast activation, neocollagenesis, and extracellular matrix remodeling.
- Extraoral applications consistently show increased tissue thickness, improved mechanical properties, and sustained clinical effects with CaHA.
- Preliminary periodontal reports suggest potential for mild interdental papilla augmentation, but data are limited by small sample sizes and short follow-up.
Conclusions:
- Current evidence supports CaHA's biological plausibility as an adjunctive approach for soft-tissue reinforcement, particularly for thin gingival phenotypes and mild papillary deficiencies.
- However, the lack of controlled periodontal studies and histological validation means CaHA application in periodontology is currently experimental.
- Further preclinical and clinical studies are necessary to validate the routine use of CaHA in periodontal therapy.
