Int J Oral Maxillofac Implants 15 (2000), No. 2 15. Apr. 2000
Int J Oral Maxillofac Implants 15 (2000), No. 2 (15.04.2000)
Myelointegration of Titanium Implants: B Lymphopoiesis and Hemopoietic Cell Proliferation in Mouse Bone Marrow Exposed to Titanium Implants
Rahal, M. Dwayne / Delorme, Danielle / Brånemark, Per-Ingvar / Osmond, Dennis G.
Multinucleated giant cells have been observed at interfaces between bone marrow and titanium implants in mouse femurs. This raises concern that macrophage-derived factors might perturb local lymphohemopoiesis, possibly even predisposing to neoplasia in the B lymphocyte lineage. It has been found that an implant-marrow interface with associated giant cells persists for at least 1.5 years. Precursor B cells show early increases in number and proliferative activity. At later intervals, however, they do not differ significantly from controls, and there are no perturbations in spatial localization of either B lineage cells or DNA-synthesizing hemopoietic cells. The results of this investigation in mice demonstrate that, following initial marrow regeneration and fluctuating precursor B cell activity, and despite the presence of giant cells, titanium implants apparently become well-tolerated by directly apposed bone marrow cells in a lasting state of myelointegration.
Keywords: B lymphopoiesis, bone marrow, giant cells, hemopoietic microenvironment, titanium implants