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3D-printed bi-layered polymer/hydrogel construct for interfacial tissue regeneration in a canine model
Mohammad Reza Jamalpour1, Amir Yadegari2, Farshid Vahdatinia3
1Department of Oral and Maxillofacial Surgery, Hamadan University of Medical Sciences, Hamadan, Iran; Dental Implants Research Center, Hamadan University of Medical Sciences, Hamadan, Iran.
A novel 3D-printed hybrid membrane combining polycaprolactone (PCL) and gelatin shows promise for tissue regeneration. This biocompatible construct significantly enhances bone regeneration in defects, offering a new solution for hard and soft tissue interfaces.
Area of Science:
- Biomaterials Science
- Tissue Engineering
- Regenerative Medicine
Background:
- Regenerative strategies face challenges at hard-soft tissue interfaces due to material limitations.
- Developing constructs that support diverse cell types for regenerating bone and soft tissues is complex.
- Adhesion between dissimilar materials like polymers and hydrogels is a key hurdle.
Purpose of the Study:
- To present a novel hybrid construct for interfacial tissue engineering.
- To design a polycaprolactone (PCL) membrane firmly adhered to a gelatin layer.
- To evaluate the construct's efficacy in Guided Bone Regeneration (GBR).
Main Methods:
- Fabrication of PCL membranes using 3D printing with controlled size and porosity.
- Attachment of gelatin to PCL membranes via aminolysis.
- In vitro and in vivo evaluation in canine tibia bone defects, including histological and CBCT analyses.
Main Results:
- Uniform gelatin adhesion to aminolyzed PCL membranes confirmed.
- Demonstrated biocompatibility, mechanical stability, and barrier function for GBR.
- In vitro studies showed enhanced osteogenesis and bone defect regeneration, with bone density approximately three times higher than controls.
Conclusions:
- The 3D-printed hybrid Gelatin/PCL bi-layered membrane is suitable for interfacial tissue engineering.
- This construct shows significant potential as a membrane for Guided Bone Regeneration procedures.
- The hybrid membrane facilitates improved bone density and regeneration in defects.
