The first theory is the theory of reactive calcification .
The first theory involves an active cell - mediated process , usually followed by spontaneous resorption by phagocytosing multinucleated cells showing a typical osteoclast phenotype .
The first theory is the theory of reactive calcification and involves an active cell - mediated process , usually followed by spontaneous resorption by phagocytosing multinucleated cells showing a typical osteoclast phenotype .