The Role of Hyaluronic Acid in Modern Dentistry
Educational overview - not medical or dental advice.
Hyaluronic acid (HA) is a naturally occurring molecule found throughout the body's connective tissues, including the gingiva and periodontal ligament. It plays a central role in the earliest stages of wound healing: during rapid tissue proliferation, HA creates a provisional matrix that allows nutrients, cells and small molecules to move freely while excluding larger, potentially harmful molecules.
From dermal filler to dental tool
HA is best known to the public as a dermal filler ingredient, but its use in dentistry works differently. Dental-grade cross-linked HA gels are not designed primarily to add volume or hold water the way a dermal filler does - their effect operates at the cellular level, creating an environment that supports fibroblast activity, collagen formation and tissue regeneration.
Cross-linking - chemically converting HA's straight-chain molecule into a three-dimensional mesh - protects it from rapid enzymatic breakdown by hyaluronidase, extending its activity at the treatment site well beyond that of non-cross-linked HA.
Where it is used
- Periodontal therapy: as an adjunct to scaling and root planing in gingivitis and periodontitis management.
- Interdental papilla and gingival recession: injected to support soft tissue regeneration where papilla loss or recession has occurred.
- Oral surgery and extractions: to support post-surgical healing and reduce swelling, pain and trismus.
- Implant dentistry: as a coating to support osseointegration, and combined with bone graft material in socket preservation or sinus lift procedures.
What the evidence shows
A randomized, double-blind study at King Abdul Aziz University Dental Hospital found statistically significant reductions in facial swelling, pain and trismus following surgical extraction of impacted mandibular third molars when cross-linked HA was used (Nadershah et al., 2018). Separately, an 18-month controlled trial by Pilloni et al. found that adjunctive cross-linked HA in coronally advanced flap surgery for gingival recession achieved substantially higher complete root coverage than surgery alone. A broader review of HA's properties also notes its bacteriostatic activity against several bacterial strains commonly found in periodontal disease, including Aggregatibacter actinomycetemcomitans and Prevotella oris.
Selected sources: Nadershah, M. et al. (2018). The Effect of Cross-Linked Hyaluronic Acid in Surgical Extraction of Impacted Mandibular Third Molars. International Journal of Dentistry and Oral Health, 4(2). Pilloni, A. et al. (2018). Effectiveness of adjunctive hyaluronic acid application in coronally advanced flap in Miller class I single gingival recession sites. Clinical Oral Investigations. Dahiya, P. and Kamal, R. (2013). Hyaluronic acid: A boon in periodontal therapy. North American Journal of Medical Sciences, 5(5), p.309.