|Title:||3d printing of collagen/oligomeric proanthocyanidin/oxidized hyaluronic acid composite scaffolds for articular cartilage repair||Authors:||Lee C.-F
|Keywords:||3D printing;Articular cartilage;Collagen;Oligomeric proanthocyanidin;Oxidized hyaluronic acid;Porous scaffolds;3D printers;Biocompatibility;Biodegradable polymers;Biomechanics;Bone;Cartilage;Cell culture;Compressive strength;Crosslinking;Defects;Flavonoids;Hyaluronic acid;Organic acids;Phosphate minerals;Scaffolds;Scaffolds (biology);3-D printing;3D-printing;Articular cartilage defects;Articular cartilage repair;Articular cartilages;Composite scaffolds;Oligomeric proanthocyanidins;Oxidized hyaluronic acid;Porous scaffold;Synthesized polymers;Collagen||Issue Date:||2021||Journal Volume:||13||Journal Issue:||18||Source:||Polymers||Abstract:||
Articular cartilage defects affect millions of people worldwide, including children, ado-lescents, and adults. Progressive wear and tear of articular cartilage can lead to progressive tissue loss, further exposing the bony ends and leaving them unprotected, which may ultimately cause osteoarthritis (degenerative joint disease). Unlike other self-repairing tissues, cartilage has a low regenerative capacity; once injured, the cartilage is much more difficult to heal. Consequently, developing methods to repair this defect remains a challenge in clinical practice. In recent years, tissue engineering applications have employed the use of three-dimensional (3D) porous scaffolds for growing cells to regenerate damaged cartilage. However, these scaffolds are mainly chemically synthesized polymers or are crosslinked using organic solvents. Utilizing 3D printing technologies to prepare biodegradable natural composite scaffolds could replace chemically synthesized polymers with more natural polymers or low-toxicity crosslinkers. In this study, collagen/oligomeric proantho-cyanidin/oxidized hyaluronic acid composite scaffolds showing high biocompatibility and excellent mechanical properties were prepared. The compressive strengths of the scaffolds were between 0.25–0.55 MPa. Cell viability of the 3D scaffolds reached up to 90%, which indicates that they are favorable surfaces for the deposition of apatite. An in vivo test was performed using the Sprague Dawley (SD) rat skull model. Histological images revealed signs of angiogenesis and new bone formation. Therefore, 3D collagen-based scaffolds can be used as potential candidates for articular cartilage repair. ? 2021 by the authors. Licensee MDPI, Basel, Switzerland.
|Appears in Collections:||森林環境暨資源學系|
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.