New research from Delft University of Technology has found that the curvature of biomaterials can either stimulate or inhibit bone cells from making new tissue. The study found that surfaces with curvatures such as saddles, which have concave curvatures, can encourage cells to create new tissue. In contrast, ball-shaped surfaces with convex curvatures can prevent cells from doing so. The study also showed that cells preferred valleys over hills.
The findings provide insight into the optimal geometry of biomaterials and implants to promote tissue regeneration. High-precision 3D printing techniques can create complex geometric designs that are small enough to be detected by cells. The study’s authors suggest that using biomaterials with the appropriate curvatures is a cost-effective way to stimulate tissue growth compared to drug-based treatments.
Cells can perceive and respond to the geometry of their environment, and their behavior is influenced by the tension in their fibers. The study showed that cells align their stress fibers with the curvatures they experience to minimize the need to bend.
The authors note that using biomaterials with too much negative curvature will require positive curvatures elsewhere to keep the sum constant. Therefore, using the curve budget wisely is essential to encourage maximum tissue regeneration.
Overall, the research offers new insights into the design of biomaterials to promote tissue regeneration and highlights the importance of curvature in stimulating or inhibiting the growth of bone cells.
You can read the full paper, titled “Emergent collective organization of bone cells in complex curvature fields” in Nature Communications, at this link. Or watch the video below.
Come and let us know your thoughts on our Facebook, Twitter, and LinkedIn pages, and don’t forget to sign up for our weekly additive manufacturing newsletter to get all the latest stories delivered right to your inbox.