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Morphometry and fabric orientation of trabecular bone in human craniofacial regions (918.17)
Author(s) -
Pryor Smith Leslie,
Dechow Paul,
Yardley Thomas
Publication year - 2014
Publication title -
the faseb journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.709
H-Index - 277
eISSN - 1530-6860
pISSN - 0892-6638
DOI - 10.1096/fasebj.28.1_supplement.918.17
Subject(s) - craniofacial , trabecular bone , anatomy , orientation (vector space) , anisotropy , biomechanics , strain (injury) , biology , medicine , geometry , physics , mathematics , optics , pathology , osteoporosis , genetics
Variation in primate craniofacial form has been attributed to orofacial function. Strain gage experiments show that during orofacial function the zygoma is subjected to high strain relative to the browridge. Trabecular bone morphometry and orientation are reflective of function, but trabecular bone in these regions has been unexplored. This study uses µCT to quantify the morphometric properties of trabecular bone, anisotropy, and fabric orientation in the human browridge and zygoma. We hypothesize that zygomatic trabecular bone will have significantly greater bone volume fraction and anisotropy relative to the browridge as an adaption to larger, more unidirectional loads. Primary orientations of trabecular bone will differ by region consistent with their function. No significant differences were found between the browridge and zygoma in BVF (0.38 vs. 0.31), and DA (1.65 vs. 1.85), but SMI was significantly lower in the browridge (0.075; honeycomb‐like vs. SMI=1.0752; ideal plate‐like, p<0.034). Orientation was highly significantly different between regions. The zygoma is made up of mediolaterally oriented plates with a slight inferosuperior tilt, while trabecular bone in the browridge is made of denser sagittally oriented plates. Both regions may be more similar in overall elasticity than predicted, but further analysis needs to test the combined effects of differences in individual features. Orientation of trabeculae in the zygoma appears to be consistent with what would be predicted based on orofacial strain patterns. Grant Funding Source : NSF BCS 0725141