# The Role of Carbon Dots in Regulating the Periodontal Immune Microenvironment: Progress and Perspectives

## TL;DR

This paper reviews how carbon dots can help manage periodontitis by regulating the immune environment in the gums.

## Contribution

The paper highlights the novel use of carbon dots in modulating the periodontal immune microenvironment through multiple mechanisms.

## Key findings

- Carbon dots show antimicrobial and microbiome-modulating properties.
- They regulate oxidative stress and macrophage polarization.
- Carbon dots support stem cell functions and bone homeostasis.

## Abstract

As a prevalent oral chronic infectious disease, periodontitis is characterized by a complex pathogenesis, including microbial infection, host immune dysregulation, oxidative stress, and abnormal bone metabolism. Given their excellent biocompatibility, multifunctionality, and structural tunability, carbon dots (CDs) have emerged as a novel nanomaterial offering fresh approaches for the pharmacological management of periodontitis. This review systematically summarizes the application characteristics of CDs in biology and the various mechanisms in modulating the periodontal immune microenvironment. These include the roles in antimicrobial and microbiome modulation, regulation of oxidative stress balance, modulation of macrophage polarization, regulation of stem cell functions, and maintenance of bone homeostasis. The unique advantages of CDs in improving the periodontal immune microenvironment through multi-target, multi-pathway mechanisms are emphasized, thereby providing a theoretical foundation for future clinical applications.