(Table 3) There were significant differences in the salivary MMP‐8 levels between healthy and gingivitis participants as measured by the biosensor (p < .05, Figure 1A), aMMP‐8 IFMA (p < .001, Figure 1B), and total MMP‐8 ELISA (p < .001, Figure 1C). Here, MMP8 is linked to gingivitis.