In order to comprehend the condition of vertebral osteophytosis, vertebral osteoarthritis and DISH (diffuse idiopathic skeletal hyperostosis) with respect to diagnosis and aetiology, the vertebral and peripheral (appendicular) frequency and distribution pattern of degenerative joint changes of 176 rather affluent citizens were analysed from the late medieval city of Dordrecht in Holland. Patterns of frequencies with respect to age and sex were found to be similar essentially to those of a present-day Dutch suburban village population. Frequencies for vertebral osteophytosis were twice those for vertebral osteoarthritis, and both increased with age in both sexes. The individual pattern of vertebral osteophytosis and vertebral osteoarthritis seems to indicate that each disorder possesses its own progressive identity. From the distribution pattern and frequency of peripheral osteoarthritis it was concluded, with respect to the vulnerability of developing this complication under physically moderate life conditions, that causal factors for vertebral osteophytosis are less important than those for vertebral osteoarthritis. Osteoarthritis presented itself as a systemic disorder, affecting synovial joints in general. Finally it was appreciated that, with increasing age, bony outgrowths from joint degeneration become anatomically masked by para-articular ossifications from DISH.
To assess the feasibility of the fusion (synostosis) status of the jugular growth plate as an age at death indicator, a series of 98 skulls of documented age and sex from the so-called 'Utrecht collection' was examined. Ages at death in the series ranged from 14 to 92 years. Only specimens that could be inspected bilaterally were taken into account. According to the few but conflicting data from the literature, fusion happens at 16-18 years, or starts at ca. 25 years of age. In our sample no fusions were seen before the age of 22 years. Unilateral fusions were found only in the age range 22-34 years. At ages above 34 years in females and above 36 years in males all jugular growth plates were fused bilaterally. These results indicate that examination of the fusion status of the jugular growth plate is of use in age at death determination.
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