The dietary behavior of two early medieval individuals with temporomandibular ankylosis.

OBJECTIVES: This study aimed to reconstruct the dietary behavior of two early medieval individuals who display gnathic malformation. MATERIAL: Two skeletons affected by temporomandibular ankylosis were analyzed, one from the Great Moravian burial site of Rajhradice (9th century AD, Czech Republic), and the other from the Avar burial site of SchÓ§nkirchen (8th century AD, Austria). METHODS: Carbon and nitrogen isotopic values were measured from the bone collagen of both individuals. In the Rajhradice case, where the childhood origin of ankylosis is deduced, isotopic analysis of dentine sections was performed. RESULTS: Both individuals show isotopic values within the range of variation of a contemporaneous population sample. There was no observable dietary change in the Rajhradice individual that could be linked to the occurrence of ankylosis. CONCLUSIONS: Both individuals consumed diets typical for their populations. They appear to not have restricted access to foodstuffs, namely animal protein, which would likely have had to be served in liquid (e.g. milk) or in a highly mashed form to compensate for insufficient mastication. SIGNIFICANCE: This finding provides specific evidence of care provided to these two afflicted members of past populations. LIMITATIONS: Though the proportion of animal protein is an important indicator of the quality of diet, many other aspects of diet - such as micronutrient content - elude stable isotope analysis. SUGGESTIONS FOR FURTHER RESEARCH: Amino acid compound specific isotope analyses of collagen would provide deeper insight into both the diet and physiology of the affected individuals.

Molecular evidence of osteoblast dysfunction in elderly men with osteoporotic hip fractures.

Osteoporosis is extremely frequent in post-menopausal women; nevertheless, osteoporosis in men is also a severe and frequently occurring but often underestimated disease. Increasing evidence links bone loss in male idiopathic osteoporosis and age related osteoporosis to osteoblast dysfunction rather than increased osteoclast activity as seen in postmenopausal osteoporosis. The aim of this study was to investigate gene expression of osteoblast related genes and of bone architecture in bone samples derived from elderly osteoporotic men with hip fractures (OP) in comparison to bone samples from age matched men with osteoarthritis of the hip (OA). Femoral heads and adjacent neck tissue were collected from 12 men with low-trauma hip fractures and consecutive surgical hip replacement. Bone samples of age matched patients undergoing hip replacement due to osteoarthritis served as controls. One half of the bone samples was subjected to RNA extraction, reverse transcription, and real-time polymerase chain reactions. The second half of the bone samples was analyzed by static histomorphometry. From each half samples from four different regions, the central and subcortical region of the femoral head and neck, were analyzed. OP patients displayed a significantly decreased RUNX2, Osterix and SOST expression compared to OA patients. Major microstructural changes in OP bone were seen in the subcortical region of the neck and were characterized by a significant decrease of bone volume, and a significant increase of trabecular separation. In conclusion, decreased local gene expression of RUNX2 and Osterix in men with hip fractures strongly supports the concept of osteoblast dysfunction in male osteoporosis. Major microstructural changes in the trabecular structure associated with osteoporotic hip fractures in men are localized in the subcortical region of the femoral neck.

Diagnosis of contact injuries in a mediaeval skeleton analysed by µCT and histology.

During an archaeological excavation in Altenberg/Linz (Upper Austria), the well-preserved skeletal remains of a mature male dated the 13th century AD were recovered. Several elements of the skeleton yielded alterations caused by trauma: beside a malunion of the left ulna which was accompanied by shortening of the diaphysis, a luxation and deformation of the left radial head was observed (Monteggia-type lesion, Bado-type I). Moreover, at the anterior aspect of the corresponding humerus, a chalice-shaped, newly built bone structure that framed the displaced capitulum radii was visible. This structure formed a sort of "alternative joint" that functionally even allowed some movements, although considerably restricted in regard to flexion/extension and even more in pronation/supination.To verify the assumption of a "single event", we not only investigated the concerned skeletal portions by gross-anatomical examination, but also by non-invasive conventional radiological, micro-computed tomographical, and histological techniques. Particular morphological features, injuries at the calvarium, and fractures of other postcranial elements imply the scenario of a close combat; although survived, the traumata obviously resulted in partial invalidity.