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A concept for scaffold-based tissue engineering in alveolar cleft osteoplasty
Moritz Berger1, Florian Probst2, Christina Schwartz3
1Laboratory of Experimental Surgery and Regenerative Medicine, Department of Surgery (Chair: W. Mutschler, MD, PhD), University Hospital Munich (LMU), Germany; Department of Oral and Maxillofacial Surgery (Chair: J. Hoffmann, MD, DDS, PhD), University Hospital Heidelberg, Germany.
Scaffold-based tissue engineering shows promise for alveolar cleft osteoplasty (ACO), offering a less invasive alternative to autologous bone grafts. This method utilizes custom scaffolds seeded with stem cells, demonstrating feasibility and potential for reduced donor-site morbidity in cleft treatment.
Area of Science:
- Biomaterials Science
- Regenerative Medicine
- Craniofacial Surgery
Background:
- Alveolar cleft osteoplasty (ACO) traditionally uses autologous bone grafts, a procedure associated with significant donor-site morbidity.
- Tissue engineering with scaffolds presents a potential alternative to reduce or eliminate donor-site complications in ACO.
Purpose of the Study:
- To assess the technical and cell biological feasibility of using scaffold-based tissue engineering for alveolar cleft osteoplasty.
- To evaluate custom-made scaffolds seeded with human mesenchymal stem cells (hMSCs) for ACO applications.
Main Methods:
- 3D printing of custom tricalcium phosphate-polyhydroxybutyrate (TCP-PHB) scaffolds based on patient-specific cone-beam computed tomography (CBCT) scans.
- Seeding scaffolds with hMSCs and monitoring cell survival, proliferation (live-dead assay, WST-1), and morphology (SEM).
- Assessing osteogenic differentiation of hMSCs using alkaline phosphatase (ALP) assays.
Main Results:
- Custom scaffolds accurately replicated patient-specific alveolar bone geometry.
- High seeding efficiency (approx. 91%) and significant hMSC proliferation (5-7 fold) observed over 3 weeks.
- Demonstrated successful hMSC growth on scaffolds and confirmed osteogenic differentiation.
Conclusions:
- Scaffold-based tissue engineering is a technically and biologically feasible approach for ACO.
- This method holds potential as a less invasive alternative to autologous bone grafts, reducing patient morbidity.
- Further in vivo studies and clinical trials are warranted to validate clinical benefits for ACO.
