Mechanical Memory of Bone: A Mechanobiological Hypothesis of Epigenetic Encoding

Bone remodeling is classically understood as an adaptive response to mechanical loading, as described by Wolff’s law. However, variability in clinical outcomes across orthodontics, implantology, and orthopedics suggests additional regulatory mechanisms. This work proposes that bone encodes prior mechanical stimuli into a stable epigenetic state termed “mechanical memory.” This memory is hypothesized to persist not in short-lived mature bone cells, but within mesenchymal stem/progenitor cells, extracellular matrix architecture, and the tissue microenvironment. Mechanistically, mechanical forces may activate PIEZO1-mediated calcium signaling and YAP/TAZ pathways, inducing lasting epigenetic modifications such as DNA methylation and chromatin remodeling. Furthermore, lineage-specific differences are proposed, with neural crest-derived craniofacial bones exhibiting more stable memory than mesoderm-derived long bones. This framework may explain clinical phenomena such as orthodontic relapse and variability in implant integration. If validated, this hypothesis could significantly impact treatment planning by incorporating tissue mechanical history into clinical decision-making.