engleski

Trace Element (TE)Release as Nutritional Supplement of daily Needs From Three Different dental Alloys in Vitro Simulation of Dental Plague

Over 90% of adult population (>35 y) in Croatia wear dental crowns and/or fixed with partial dentures (FPD) and in 30% of population FPDs are combined with metal frame removable partial dentures (RPD). The aim of this work was to assess how TE leached from crown/bridge Au-Pt metal alloy, niCr alloy for dental ceramics and from CoCrMo alloy for RPD-m in simulated dental plague. We soaked ten sets of Au-Pt alloy pieces having 133 mm2 exposure surface each, ten sets of CcCrMo alloy pieces and ten sets of NiCr alloy pieces having 497 mm2 exposure surface each, from 1 to 30 days (six replicates each)in lactic acid (pH 3.5). TE were assessed by ICP-AES (JY50P, Jobin-Ivon, France detection limit 10micrograms/L. from the Au-Pt alloy (refinary of precious metals, Zagreb, Croatia) were released in lactic acid( mean ; SD)Zn, 140 (47), Cu 113 (79), Fe 58(36), and Cr(<10). From the CoCrMo (Wironit, Bego, Germany) (mean ; SD): Co 501(400), Fe 133(360), Zn 78(39), Ni 34 (60) and Cr 65(121) of TE were released. The NiCr alloy (Wiron99, Bego, Germany)(mean ; SD): Co 339(318), Fe 227(272), Zn 96(51), Ni 432 (502) and Cr 368 (361) were released, The manufacturers did not indicate the presence of all the elements release from each alloy. Some of the TE were released in concentrations that exceed daily essential needs for human health, which may be of interest to nutritionists, After laboratory procedures TEs may be released in higher amount and other TE may become detectable, However, the considerable amounts of essential albeit allergenic essential TE Cr, Co, and Ni may be present locally.

Au-Pt alloy ; NiCr alloy ; trace elements ; simulated dental plague

nije evidentirano