the radiocrystallographic study of 46 salivary calculi using the debye and scherrer powder methods showed that such stones , whether submaxillary , parotid or `` '' accessory '' '' consist essentially of hydroxyapatite with the frequent presence of tricalcium and octocalcium phosphates , whitlockite and rarely brushite and calcite .
C0752168
salivary calculi
C0006736
stones