[Establishment and application of an in vitro model for apatite crystal mineralization].
OBJECTIVE
To establish an in vitro model for the apatite crystal mineralization. To evaluate the influences of bovine serum albumin (BSA) and fluoride to the mineralization of apatite crystal.


METHODS
The model was constructed using cation selective membrane (CMV) and dialysis membrane. Double distilled water (DDW), BSA, 5, 20, 100 mg x L(-1) fluoride were added into the reaction space of the model. Reaction was carried out at 37 degrees C for 3 days under gentle stirring. The crystals were identified by scanning electron microscope (SEM) and X-ray diffraction (XRD).


RESULTS
The model was established successfully. When DDW and BSA were added respectively, the main component of the deposit was octacalcium phosphate (OCP), but the shape and size of the crystals differs from each other. When fluoride with different concentration were added, the main component of the crystal turned to rod-like and prism-like fluoroapatite (FAP) crystal. The size and crystallinity of the FAP increased with the increase of the fluoride concentration.


CONCLUSIONS
It is an effective way to evaluate the influence factors of the apatite crystal mineralization by using the in vitro model.
Wang
Jiang
J
Dept. of Operative Dentistry and Endodontics, School of Stomatology, The Fourth Military Medical University, Xi'an 710032, China.
Ni
Long-Xing
LX
Wang
Han-Guo
HG
D001031:Apatites; D002130:Calcium Phosphates; D003460:Crystallization; D005459:Fluorides; D066298:In Vitro Techniques; D010710:Phosphates; D014961:X-Ray Diffraction
D001031:Apatites; D002130:Calcium Phosphates; D010710:Phosphates; C022045:octacalcium phosphate; C012980:fluorophosphate; C025105:fluorapatite; D005459:Fluorides