[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.
Lissera
R G
RG
Cátedra de Microbiología, Facultad de Odontología, Universidad Nacional de Córdoba, Argentina.
Luna Maldonado De Yankilevich
E R
ER
Battellino
L J
LJ
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