Mechanobiology of Periodontal Ligament Cells

The periodontal ligament (PDL) is a specialised connective tissue that secures teeth within the alveolar bone and operates as both a shock absorber and mechanoreceptor during mastication and orthodontic tooth movement. Cells within the PDL, including fibroblasts and periodontal ligament stem cells (PDLSCs), convert mechanical stimuli—such as tensile, compressive or shear forces—into biochemical signals that regulate tissue remodelling, immune responses and bone homeostasis. This process of mechanotransduction relies on integrin-mediated adhesion complexes, cytoskeletal remodelling and mechanosensitive ion channels to trigger intracellular cascades including MAPK, Wnt/β-catenin, Hippo/YAP and TGF-β pathways. Through these networks, mechanical cues modulate cell proliferation, differentiation and extracellular matrix turnover, thereby orchestrating alveolar bone resorption and formation. Insights into PDL mechanobiology have informed strategies for optimising orthodontic force application, enhancing periodontal regeneration and mitigating relapse or tissue damage in inflammatory conditions. The interplay between force magnitude, frequency and duration remains pivotal to harness beneficial remodelling while avoiding pathological outcomes such as necrosis or irreversible bone loss.

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Mechanobiology of Periodontal Ligament Cells publication trend

The graph below shows the total number of articles in mechanobiology of periodontal ligament cells across all publications each year (not limited to Nature Index journals).

Technical terms

Mechanotransduction: The process by which cells convert mechanical stimuli into biochemical signals, involving adhesion receptors, cytoskeleton and ion channels.

Periodontal ligament stem cells (PDLSCs): Multipotent progenitor cells within the PDL capable of differentiating into osteoblasts, fibroblasts and other lineages under mechanical cues.

F-actin: Filamentous actin that forms part of the cytoskeleton and transmits tensile forces to mechanosensitive signalling molecules.

Piezo1: A mechanically activated ion channel that mediates Ca2+ influx in response to membrane deformation.

YAP: Yes-associated protein, a transcriptional co-activator regulated by cytoskeletal tension and integral to the Hippo pathway, controlling cell proliferation and differentiation.

References

1. LRP6/filamentous-actin signaling facilitates osteogenic commitment in mechanically induced periodontal ligament stem cells. Cellular & Molecular Biology Letters (2023).
2. Heavy mechanical force decelerates orthodontic tooth movement via Piezo1-induced mitochondrial calcium down-regulation. Genes & Diseases (2024).
3. Mechanisms of mechanical force in periodontal homeostasis: a review. Frontiers in Immunology (2024).