The present paper tries to unravel, following the investigation of some clinical cases, the mystery of pulp mineralization processes and to find out which could be the causes of their formation. In the speciality literature numerous opinions about their various forms taken at the pulp tissue level (pulp stones, denticles, diffuse mineralizations) have been advanced, but their pathogeny has not been elucidated yet. The investigation includes both young and older persons in which clinical and hystopathological exams have been made on pulp tissue obtained from bio-pulpectomy or following teeth extraction. The study brought some interesting, useful information to widen the knowledge in this domain and added new elements that helped the understanding of pulp mineralization pathogenesis. The possible involvement of Nanobacterium sanguineum, recently discussed in literature, could explain many of the cases observed in the unerupted teeth or in the members of the same family. The authors concluded that these mineralizations could be seen at all ages, but more frequently at senescence.