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Calcium Hydroxyapatite Nucleation by Lipid Extract of Bacterionema matruchotii

Several investigators have established that Bacterionema matruchotii, a large, filamentous oral microorganism, will acquire intracellular calcium hydroxyapatite.1-3 Takazoe4 has shown that an early event in this calcification process is the concentrating of calcium within the cell by organic binding. Ennever, Vogel, and Takazoe5 have shown that the factor responsible for calcium binding by the microorganism could be removed from the cell by a lipid extraction. The initial purpose of this study was to determine whether the lipid extract of B matruchotii could induce apatite crystallinity in a metastable calcium phosphate solution. This was extended to include an examination of the crude phospholipid and nonphospholopid fractions.