Variation in Osteon Circularity and Its Impact on Estimating Age at Death
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The Ohio State University / OhioLINK
2010
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| Online Access: | http://rave.ohiolink.edu/etdc/view?acc_num=osu1273762376 |
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ndltd-OhioLink-oai-etd.ohiolink.edu-osu12737623762021-08-03T05:59:30Z Variation in Osteon Circularity and Its Impact on Estimating Age at Death Goliath, Jesse Roberto Biology Microbiology Physical Anthropology age estimation bone remodeling osteon circularity bone histomorphometry cortical bone Researchers have implemented many histomorphometric techniques to estimate age at death for human skeletal remains. While previous studies have reported relations between osteon size and age, few studies have focused on the shape of secondary osteons. Osteon circularity (On.Cr) is a factor potentially affecting histological estimations. Additionally, with age the numbers of observable osteons and osteon fragments increase and an asymptotic value for osteon population density (OPD) is eventually achieved. The cortex of bones reaches asymptote by 60 years of age, but it can occur as early as age 50. Once asymptote is reached, histological methods can no longer produce reliable age at death estimations. The purpose of this study is to establish if circularity differs between young and old age groups, and whether observed On.Cr is due to the effects of increasing OPD per unit area and osteon size (area; On.Ar) on the shape of osteons. To determine circularity, osteons were measured from thin (~100µm) cross-sections of femora and ribs of 29 individuals under and over the age of 50 from a modern cadaver sample of known age at death. The observed results support the observations of Currey (1964) and Britz et al. (2009) that osteon cross-sectional shape becomes more circular with age. With the increase in the number of osteons and their fragments per unit area (OPD) with age, the probability of eccentric and larger osteons surviving to be measured decreased considerably. This finding may be useful to help identify if a bone has reached its OPD asymptote, or even help refine our ability to estimate age for older individuals. 2010-07-30 English text The Ohio State University / OhioLINK http://rave.ohiolink.edu/etdc/view?acc_num=osu1273762376 http://rave.ohiolink.edu/etdc/view?acc_num=osu1273762376 unrestricted This thesis or dissertation is protected by copyright: all rights reserved. It may not be copied or redistributed beyond the terms of applicable copyright laws. |
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NDLTD |
| language |
English |
| sources |
NDLTD |
| topic |
Biology Microbiology Physical Anthropology age estimation bone remodeling osteon circularity bone histomorphometry cortical bone |
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Biology Microbiology Physical Anthropology age estimation bone remodeling osteon circularity bone histomorphometry cortical bone Goliath, Jesse Roberto Variation in Osteon Circularity and Its Impact on Estimating Age at Death |
| author |
Goliath, Jesse Roberto |
| author_facet |
Goliath, Jesse Roberto |
| author_sort |
Goliath, Jesse Roberto |
| title |
Variation in Osteon Circularity and Its Impact on Estimating Age at Death |
| title_short |
Variation in Osteon Circularity and Its Impact on Estimating Age at Death |
| title_full |
Variation in Osteon Circularity and Its Impact on Estimating Age at Death |
| title_fullStr |
Variation in Osteon Circularity and Its Impact on Estimating Age at Death |
| title_full_unstemmed |
Variation in Osteon Circularity and Its Impact on Estimating Age at Death |
| title_sort |
variation in osteon circularity and its impact on estimating age at death |
| publisher |
The Ohio State University / OhioLINK |
| publishDate |
2010 |
| url |
http://rave.ohiolink.edu/etdc/view?acc_num=osu1273762376 |
| work_keys_str_mv |
AT goliathjesseroberto variationinosteoncircularityanditsimpactonestimatingageatdeath |
| _version_ |
1719429007622012928 |