Characteristic Length	Numerical values, surveyed from the literature, that characterize major geometric features of a specific bone lengthscale, see Definition 8.
Definition	Non-mathematical definitions that may be differently understood by specialists from different fields. Mathematical definitions are not presented here due to their complexity. Rigorous mathematical definitions are found in the references present in Appendix C.
Highlight	A statement that plays a major role in the argumentation.
Illustration	A non-mathematical explanation of a physical phenomenon.
Open Issue	Issues and problems not clearly defined or completely solved within the surveyed literature.
Remark	Relevant notes.