Persistence of bone collagen cross-links in skeletons of the Nuraghi population living in Sardinia 1500-1200 B.C.

Bone collagen has a specific molecular ultrastructure which can be proved by birefringence. This protein, forming the main organic component of bone tissue, is known to survive millennia in paleontological bones and teeth. Birefringence of bone collagen obtained from the skeletons of the Nuraghi population living in Sardinia c-ca 1500 years B.

Normalization of periodontal tissues in osteopetrotic mib mutant rats, treated with CSF-1.

The osteopetrotic mib mutation in rats causes defects in the skeletal bone tissue in young animals. These defects, i.e.

[Effect of bisphosphonates (HEBP, CL2MBP) on the process of biological mineralization in fresh bone and bone tissue de novo as a result of experimental osteogenesis induction in guinea pigs].

It is known from the literature that bisphosphonates inhibit mineralization process in skeletal tissues. To study in vivo the effects of HEBP (etidronate) and Cl2MBP (clodronate) both on preexisting bone mineral as well as on the early stages of the mineralization process the experimental model of heterotopical bone induction was chosen. Urinary bladder mucosa was used as an inductor of osteogenesis.

Nuragic bone collagen retains its molecular structure.

The molecular structure of bone collagen was found to be preserved in Nuragic bone samples several centuries after burial. Enhanced birefringence of bone and dentin collagen fibres observed in polarized light after Sirus red staining was used to demonstrate this fact.