title: In vitro determination of the chromatic effect of a silver nanoparticles solution linked to the gantrez S-97 copolymer on tooth enamel.
abstract: Silver nanoparticles (NNPs), alone or in combination with the bioadhesive Gantrez S-97, have demonstrated their efficacy against Streptococcus mutans; however, it is not known if this combination changes the color of teeth. The aim of this work was to measure the color changes occurring after the use of a Gantrez-NNP combination on enamel tooth blocks. Two study groups were randomly formed: enamel blocks brushed with (a) the Gantrez-NNP combination and (b) conventional toothpaste, for 1 minute once daily for 4 weeks, then rinsed with distilled water and placed in thymol solution. Color changes in the enamel blocks were measured using a Minolta colorimeter CR300. Analysis of mixed models was performed with R 2.10.1 at a 95% confidence level, using the nonlinear mixed effects (NLME) package. The results showed that there were no color changes over time, only a high luminosity equal in both groups. Our study showed that the use of the Gantrez-NNP combination is safe with respect to dental esthetics in the control of S. mutans.
authors.affiliation: Departmnent of Clinical Epidemiology, Facultad de Medicina, Universidad Autónoma de San Luis Potosí, SLP, México.
authors.forename: Juan Francisco
authors.initials: JF
authors.lastname: Hernández-Sierra
authors.forename: Facundo
authors.initials: F
authors.lastname: Ruíz
authors.forename: Juan Pablo
authors.initials: JP
authors.lastname: Castanedo-Cázares
authors.forename: Vera
authors.initials: V
authors.lastname: Martinez-Ruiz
authors.forename: Peter
authors.initials: P
authors.lastname: Mandeville
authors.forename: Mauricio
authors.initials: M
authors.lastname: Pierdant-Pérez
authors.forename: Antonio
authors.initials: A
authors.lastname: Gordillo-Moscoso
authors.forename: Amaury de J
authors.initials: Ade J
authors.lastname: Pozos-Guillén
mesh_terms: D000269:Adhesives / Q000737:chemistry*; D000891:Anti-Infective Agents, Local / Q000737:chemistry*; D003116:Color; D003124:Colorimetry / Q000295:instrumentation; D003743:Dental Enamel / Q000033:anatomy & histology*; D006801:Humans; D049449:Luminescence; D008298:Maleates / Q000737:chemistry*; D008422:Materials Testing; D053768:Metal Nanoparticles / Q000737:chemistry*; D011145:Polyvinyls / Q000737:chemistry*; D012834:Silver / Q000737:chemistry*; D014075:Tooth Discoloration / Q000473:pathology; D014100:Toothpastes / Q000737:chemistry; D014867:Water / Q000737:chemistry
chemical_list: D000269:Adhesives; D000891:Anti-Infective Agents, Local; D008298:Maleates; D011145:Polyvinyls; D014100:Toothpastes; C058026:polyvinylmethoxyethylene-maleic anhydride copolymer; D014867:Water; D012834:Silver