title: Determination of hip-joint loading patterns of living and extinct mammals using an inverse Wolff's law approach.
abstract: It is well known that bone adapts its microstructure in response to loading. Based on this form-follows-function relationship, we previously developed a reverse approach to derive joint loads from bone microstructure as acquired with micro-computed tomography. Here, we challenge this approach by calculating hip-joint loading patterns for human and dog, two species exhibiting different locomotion, and comparing them to in vivo measurements. As a proof of concept to use the approach also for extinct taxa, we applied it to a cave lion fossil bone. Calculations were in close agreement with in vivo measurements during walking for extant species, showing distinguished patterns for bipedalism and quadrupedalism. The cave lion calculations clearly revealed its quadrupedal locomotion and suggested a more diverse behaviour compared to the dog, which is in agreement with extant felids. This indicates that our novel approach is potentially useful for making inferences about locomotion in living as well as extinct mammals and to study evolutionary joint development.
authors: Orthopaedic Biomechanics, Department of Biomedical Engineering, Eindhoven University of Technology, P.O. Box 513, 5600 MB , Eindhoven, The Netherlands.
authors: Patrik
authors: P
authors: Christen
authors: Keita
authors: K
authors: Ito
authors: Frietson
authors: F
authors: Galis
authors: Bert
authors: B
authors: van Rietbergen
mesh_terms: D000369:Aged, 80 and over; D000465:Algorithms; D000818:Animals; D004285:Dogs; D053476:Extinction, Biological; D005270:Femur Head / Q000000981:diagnostic imaging; D020342:Finite Element Analysis; D006621:Hip Joint / Q000000981:diagnostic imaging / Q000502:physiology*; D006801:Humans; D008045:Lions; D008322:Mammals / Q000502:physiology*; D008954:Models, Biological; D010024:Osteoporosis / Q000000981:diagnostic imaging / Q000503:physiopathology; D016474:Weight-Bearing; D055114:X-Ray Microtomography