[Velocity of erosion and factors that modify human tooth demineralization in vitro].
Velocity of erosion on human teeth exposed to a carbonated beverage as a function of time and temperature has been studied in vitro, as well as the effect of the experimental formation of a acquired pellicle and the influence of the inclusion of either F or saliva on the dissolving capacity of beverage. During the first stage of exposition, erosion as a function of time showed a biphasic curve, being the rate low during the first 10 minutes time; thereafter, velocity increased and remained stable until the 60 minute incubation period finished. At the second stage, demineralization followed a monophasic curve, displaying a stable rate until the end of it. At the initial stage, molar ratio Ca/P was much less than that corresponding to hydroxyapatite (approximately 1.67); however, as exposition to erosive beverage was prolonged, the former ratio reached values compatible with this mineral species. F or saliva incorporation together with the experimental formation of the acquired pellicle significatively reduced beverage demineralizing capacity (p < 0.0001). This finding introduces the possibility of attenuating such erosive capacity of carbonated beverages by including not excessively toxic fluoride quantities.
Cátedra de Microbiología, Facultad de Odontología, Universidad Nacional de Córdoba, Argentina.
R G
RG
Lissera
E R
ER
Luna Maldonado De Yankilevich
L J
LJ
Battellino
D000328:Adult; D000704:Analysis of Variance; D002118:Calcium / Q000032:analysis; D002253:Carbonated Beverages / Q000009:adverse effects*; D003743:Dental Enamel / Q000187:drug effects* / Q000378:metabolism; D044622:Dental Pellicle; D005260:Female; D005459:Fluorides / Q000494:pharmacology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D010710:Phosphates / Q000032:analysis; D012463:Saliva / Q000737:chemistry*; D013696:Temperature; D013997:Time Factors; D017001:Tooth Demineralization / Q000378:metabolism*; D014077:Tooth Erosion / Q000209:etiology / Q000378:metabolism*
D010710:Phosphates; D005459:Fluorides; D002118:Calcium