The 2-Hydroxyethyl methacrylate (HEMA) monomer is widely used in dental restorative materials. However, its release can significantly impact periodontal tissues. Recent research explored how HEMA dental monomer inflammation affects human gingival fibroblasts (HGFs). Specifically, scientists investigated chemokine production and intracellular signaling pathways involved in this interaction.

The study revealed that HEMA inhibits the production of chemokines like CCL2, CCL20, CXCL10, and IL-8. These molecules typically facilitate leukocyte migration during inflammatory responses. Furthermore, researchers observed that HEMA suppresses the NF-κB signaling pathway. In contrast, it did not influence mitogen-activated protein kinases (MAPKs), showing a selective inhibitory profile.

Mechanisms of HEMA Dental Monomer Inflammation

Additionally, the study found that HEMA increases the expression of heme oxygenase-1 (HO-1). This protein often acts as an antioxidant during cellular stress to protect tissues. Consequently, the suppression of NF-κB p65 nuclear translocation reduces the overall immune response. This finding suggests that HEMA might alter periodontal healing processes by modulating leukocyte recruitment.

Therefore, clinicians should consider these biological effects when selecting restorative materials for subgingival lesions. While HEMA is effective for bonding, its influence on gingival health requires careful monitoring. Moreover, understanding these molecular changes helps in developing more biocompatible dental composites for long-term clinical success.

What is HEMA in dentistry?

HEMA, or 2-Hydroxyethyl methacrylate, is a common monomer used in dental resin-based restoratives and adhesives to improve bonding and wettability.

How does HEMA affect gingival inflammation?

Research indicates that HEMA suppresses the production of key chemokines and inhibits the NF-κB signaling pathway, which can dampen the local immune response in gingival tissues.

Why is HO-1 expression significant?

The increase in heme oxygenase-1 (HO-1) expression suggests that HEMA induces a cellular stress response, acting as a defense mechanism in gingival fibroblasts.

Disclaimer: This content is for informational and educational purposes only. It does not constitute medical advice or a professional relationship. Refer to the latest local and national guidelines for clinical practice.

References

Okamoto R et al. Inhibitory Effects of 2-Hydroxyethyl methacrylate on IL-1β-Induced NF-κB Activation and Chemokine Production in Human Gingival Fibroblasts. Toxicol Mech Methods. 2026 Feb 25. doi: 10.1080/15376516.2026.2634931. PMID: 41738334.

Cataldi A, et al. NF-kB mediated down-regulation of collagen synthesis upon HEMA (2-hydroxyethyl methacrylate) treatment of primary human gingival fibroblast/Streptococcus mutans co-cultured cells. PubMed. 2015.

Perdigão J, et al. Do HEMA-free adhesive systems have better clinical performance than HEMA-containing systems in noncarious cervical lesions? A systematic review and meta-analysis. Pocket Dentistry. 2018.