Research from Delft University of Technology has found that bone cells have a preference for particular implant geometries.

After testing different shapes, and using high precision 3D printing, the researchers found that the cells were more likely to attach to concave shapes, prefering ‘valleys’ over ‘hills’.

https://www.nature.com/articles/s41467-023-36436-w
https://www.tudelft.nl/en/2023/tu-delft/new-tool-for-organ-repair-curvature-of-the-environment
https://www.youtube.com/watch?v=4XQtU7j7jic