title: Effects of a non-rinse conditioner on the enamel of primary teeth.
abstract: The aim of this in vitro study was to evaluate by scanning electron microscopy the morphological aspects of the enamel of primary teeth after etching with 36% phosphoric acid or a non-rinse conditioner. Ten naturally exfoliated anterior primary teeth were selected. The samples were subjected to prophylaxis with pumice paste and water using a low-speed hand piece. Etching was done on the buccal surface. Specimens were divided into 2 groups: G1 (n=10): etching with 36% phosphoric acid gel - Conditioner 36 (Dentsply) for 20 s, followed by water rinse for 15 s; G2 (n=10): etching with NRC - Non Rinse Conditioner (Dentsply) for 20 s, followed by air drying for 15 s. The samples were dehydrated, mounted on metal stubs, coated with gold and observed with Jeol JSM-6100 scanning electron microscope. Electron-micrographic analysis showed that both etching agents were effective for etching the enamel of primary teeth causing the formation of microporosities on the enamel surface, although the etching pattern was more effective with the use of 36% phosphoric acid gel.
authors.affiliation: Discipline of Pediatric Dentistry, Faculty of Dentistry of São José dos Campos, UNESP, São José dos Campos, SP, Brazil.
authors.forename: Marcelo
authors.initials: M
authors.lastname: Fava
authors.forename: Silvio Issáo
authors.initials: SI
authors.lastname: Myaki
authors.forename: Victor Elias
authors.initials: VE
authors.lastname: Arana-Chavez
authors.forename: Flavio
authors.initials: F
authors.lastname: Fava-de-Moraes
mesh_terms: D000134:Acid Etching, Dental / Q000379:methods*; D000388:Air; D003743:Dental Enamel / Q000187:drug effects* / Q000648:ultrastructure; D003747:Dental Enamel Solubility / Q000187:drug effects; D003764:Dental Materials / Q000494:pharmacology; D003777:Dental Prophylaxis; D006801:Humans; D008298:Maleates / Q000494:pharmacology*; D008422:Materials Testing; D008855:Microscopy, Electron, Scanning; D010756:Phosphoric Acids / Q000494:pharmacology; D016062:Porosity; D014094:Tooth, Deciduous / Q000187:drug effects* / Q000648:ultrastructure; D014867:Water
chemical_list: D003764:Dental Materials; D008298:Maleates; D010756:Phosphoric Acids; C444699:non-rinse conditioner; D014867:Water; C030242:phosphoric acid