Osteogenic Responses to Mechanical Stress in Craniofacial Sutures

Mechanical loading of craniofacial sutures induces a coordinated sequence of cellular and molecular events that drive new bone formation and remodelling. When tensile or compressive forces are applied across patent sutures, osteoprogenitor cells differentiate into osteoblasts, depositing matrix and initiating mineralisation. Concurrently, osteoclast activity is modulated to balance resorption and formation, ensuring controlled expansion or stabilisation of the suture gap. Mechanotransduction pathways, including Wnt/β-catenin signalling and inositol 1,4,5-trisphosphate receptor (IP₃R)-mediated calcium release, translate physical stimuli into gene expression programmes. Immune cells, notably macrophages polarised towards a reparative M2 phenotype, secrete cytokines and growth factors that further support osteogenesis. Transcriptional regulators such as STAT3 integrate tensile stress signals to enhance osteoblastic differentiation, while local hormones like parathyroid hormone can augment both suture expansion and consolidation. Advances in imaging, molecular profiling and targeted interventions promise to refine orthodontic and orthopaedic therapies for craniofacial deformities by harnessing these osteogenic responses.

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Osteogenic Responses to Mechanical Stress in Craniofacial Sutures publication trend

The graph below shows the total number of articles in osteogenic responses to mechanical stress in craniofacial sutures across all publications each year (not limited to Nature Index journals).

Technical terms

Craniofacial sutures: Fibrous joints between skull bones that remain unfused to permit growth and respond to mechanical forces.

Mechanotransduction: Cellular process by which mechanical stimuli are converted into biochemical signals driving gene expression and cell behaviour.

Osteoblast: Bone-forming cell responsible for matrix synthesis and mineral deposition.

Osteoclast: Multinucleated cell specialised in bone resorption to sculpt and remodel skeletal tissue.

Macrophage polarization: Functional differentiation of macrophages into phenotypes (e.g. M1 pro-inflammatory, M2 reparative) that influence tissue remodelling.

References

1. Mechanically induced M2 macrophages are involved in bone remodeling of the midpalatal suture during palatal expansion. Progress in Orthodontics (2024).
2. Suppressing STAT3 activation impairs bone formation during maxillary expansion and relapse. Journal of Applied Oral Science (2023).
3. Gli1+ Cells Residing in Bone Sutures Respond to Mechanical Force via IP3R to Mediate Osteogenesis. Stem Cells International (2021).
4. Parathyroid hormone promotes maxillary expansion and reduces relapse in the repeated activation maxillary expansion rat model by regulating Wnt/β-catenin pathway. Progress in Orthodontics (2022).