Abstract
The fine structure of the osteocytes and of the immediately adjacent bone matrix has been studied in the jaws of young rats demineralized with EDTA. The events marking the life cycle of the cell and their effects on the pericellular bone substance have been grouped into 3 phases. 1. The formative period, where the osteocyte resembles an osteoblast but shows a gradual decrease in the amount of endoplasmic reticulum and in the size of the Golgi complex. 2. The beginning of resorption (osteocytic osteolysis) which is characterized by a further decrease of the secretory organelles and the jagged appearance of the perilacunar border. Later in this phase there is further development and activity of the lysosomes resulting in increased widening of the lacuna and accumulation in the lacuna of fibrillar and flocculent material. 3. The eventual degeneration and death of the cell. No evidence of regeneration (“osteoplasia”) has been observed.
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