Abstract
Recently published work has shown the effectiveness of a buffered fluoride solution saturated with solid brushite in the remineralization of sections of carious dentine in vitro. The present work confirms that the optimum fluoride concentration is between 5–20 ppm and describes the rapid collapse of the remineralization system when the initial fluoride concentration is raised to 100 ppm. X-ray diffraction analysis of remineralized carious dentine revealed only the presence of relatively well-crystallised apatite, indicating that hydroxyapatite is the mineral deposited in the tissue. Within the optimum fluoride concentration range, the solid phase of the remineralization fluid persists as brushite and in the absence of tooth sections the fluid is stable for at least 8 days.
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