Background: Matrix metalloproteinases (MMPs) are zinc-dependent enzymes that regulate extracellular matrix degradation and remodelling. Among them, MMP-8 and MMP-9 are key mediators of inflammation, tissue remodelling, and wound healing. They have been implicated in both type 1 diabetes mellitus (T1DM) and periodontal disease (PD) [1]. The literature indicates a bidirectional association between T1DM and PD: ch...