PEREIRA, A. R. B.; http://lattes.cnpq.br/7974984667692820; PEREIRA, Allana Roberta Bandeira.
Resumen:
Allergy caused by latex proteins has been well documented. Thus, the study of non-
latex materials, is necessary. The aim of this study is to evaluate the cytotoxicity of
silver-coloured orthodontic chain elastics, of polyurethane and latex-free. Nine chain
elastics from different manufactures (3 latex-free and 6 polyurethane) were divided
into 9 groups of 10 elastics each: Group UK (Latex-free, 3M Unitek), Group TP
(Látex-free, TP Orthodontics), Group AO (Látex-free, American Orthodontics), Group
O (Polyurethane, OrthoSource), Group M (Polyurethane, Morelli), Group TD
(Polyurethane, Tecnident), Group UD (Polyurethane, Uniden), Group AZ
(Polyurethane, Abzil) and Group AK (Polyurethane, Aditek). The cytotoxicity essay
was performed using cell cultures (L-929 line cells, mouse fibroblast) that were
submitted to the cell viability test with neutral red (“dye-uptake”) at 1, 2, 3, 7 and 28
days. Analysis of variance (ANOVA) with multiple comparisons and Tukey’s test were
employed (p<.05). The results showed no statistically significant differences between
Groups UK, TP and AO in all experimental times (p>.05), except between the Groups
UK and TP at 28 days (p<.05). There was significant statistically difference (p<.05)
between the viability of the cells in the Groups O and TD with the Groups M, AZ, AK
at 1 and 2 days. The polyurethane elastics showed lower cell viability in the first 48
hours, with increase on 3rd and 7th day, and viability similar to latex-free elastics at
28 days. It can be concluded that the latex-free chain elastic showed higher cell
viability. The OrthoSource and Tecnident trademark showed lower cell viability the
initial 48 hours.