Stem Cell Applications in Alveolar Repair and Bone Regeneration

Stem cell–based strategies have emerged as a transformative approach to restoring both alveolar bone in the jaw and larger skeletal defects. Mesenchymal stem cells (MSCs) sourced from bone marrow, dental pulp or synovial fluid possess inherent osteogenic potential and can be delivered on biocompatible scaffolds or within engineered gels to orchestrate new bone formation. In alveolar cleft repair, autologous stem cells combined with ceramic granules or collagen sponges reduce donor-site morbidity and support tooth eruption pathways. For larger bone defects arising from trauma or tumour resection, three-dimensional printed scaffolds loaded with stem cells and osteoinductive factors recreate the native extracellular matrix and provide mechanical stability. Growth factors such as bone morphogenetic protein-2 (BMP-2) and concentrated growth factors (CGF) accelerate osteoinduction and angiogenesis, while mechanical cues enhance cell differentiation and matrix remodelling. Collectively, these advances bridge the gap between basic stem cell biology and clinical craniofacial reconstruction, offering minimally invasive, patient-tailored therapies that integrate seamlessly with native tissue and promote functional recovery.

Research from Nature Portfolio

In a preclinical primate model, three-dimensional bioglass scaffolds complexed with MSCs and BMP-2 gene capsules significantly improved alveolar bone regeneration. Treated sites exhibited uniform new bone formation, vascular ingrowth and scaffold degradation over 12 weeks, demonstrating translational potential for critical-size defects. Another study combined minimally invasive synovial fluid-derived MSCs with laser-sintered polyetherketoneketone (PEKK) scaffolds to repair critical-sized calvarial defects in rabbits. In vivo evaluation revealed that uninduced MSCs seeded on PEKK produced double the new bone volume compared to scaffold alone, obviating the need for pre-differentiation and highlighting the value of patient-derived cells for load-bearing applications.

Stem Cell Applications in Alveolar Repair and Bone Regeneration publication trend

The graph below shows the total number of articles in stem cell applications in alveolar repair and bone regeneration across all publications each year (not limited to Nature Index journals).

Technical terms

Mesenchymal stem cells (MSCs): Multipotent progenitor cells capable of differentiating into osteoblasts, chondrocytes and adipocytes.

Alveolar cleft: A congenital gap in the alveolar process of the maxilla, often associated with cleft lip and palate.

Bone morphogenetic protein-2 (BMP-2): A potent osteoinductive growth factor that stimulates MSC differentiation into bone-forming cells.

Scaffold: A biocompatible three-dimensional structure that supports cell attachment, proliferation and matrix deposition.

Osteoinduction: The process by which progenitor cells are stimulated to become bone-forming osteoblasts.

Concentrated growth factor (CGF): A fibrin-rich autologous preparation containing platelets and growth factors that promote angiogenesis and osteogenesis.

References

1. Mechanical force increases tooth movement and promotes remodeling of alveolar bone defects augmented with bovine bone mineral. Progress in Orthodontics (2024).
2. Fabrication and optimization of phospholipids-based phase separation in-situ gel loaded with BMP-2 nanosized emulsion for bone defect. Frontiers in Pharmacology (2023).
3. The current regenerative medicine approaches of craniofacial diseases: A narrative review. Frontiers in Cell and Developmental Biology (2023).
4. Bone Marrow Mononuclear Cells Combined with Beta-Tricalcium Phosphate Granules for Alveolar Cleft Repair: A 12-Month Clinical Study. Scientific Reports (2017).
5. Deciduous Dental Pulp Stem Cells for Maxillary Alveolar Reconstruction in Cleft Lip and Palate Patients. Stem Cells International (2020).
6. 3D Printing of Bone Grafts for Cleft Alveolar Osteoplasty – In vivo Evaluation in a Preclinical Model. Frontiers in Bioengineering and Biotechnology (2020).
7. Effect of Concentrated Growth Factor (CGF) on the Promotion of Osteogenesis in Bone Marrow Stromal Cells (BMSC) in vivo. Scientific Reports (2018).
8. Combination of polyetherketoneketone scaffold and human mesenchymal stem cells from temporomandibular joint synovial fluid enhances bone regeneration. Scientific Reports (2019).
9. Alveolar bone repair of rhesus monkeys by using BMP-2 gene and mesenchymal stem cells loaded three-dimensional printed bioglass scaffold. Scientific Reports (2019).
10. A simple rocker‐induced mechanical stimulus upregulates mineralization by human osteoprogenitor cells in fibrous scaffolds. Journal of Tissue Engineering and Regenerative Medicine (2017).