title: SEM study of different treatments of the smear layer on different cavity walls.
abstract: The present study evaluated the effects of slightly demineralizing treatments on dentinal cavity walls, since some recently developed adhesive procedures are applied over the smear layer. Ten experimental treatments--mechanical, chemical or mechanical/chemical--were applied on MOD cavity walls prepared in vitro with diamond burs. The dentinal surface of a lateral and of a pulpal wall of each cavity was evaluated through scanning electron microscopy, and the effects of the treatments were compared. All treatments except air/water spray removed some of the smear layer, and slight differences were observed regarding the studied cavity walls: on dentin from pulpal walls the enamel hatchet associated with tannic acid produced a better effect than the other treatments, and on dentin from lateral walls the biological detergent rubbed with cotton pellets was a little more effective than the other treatments. The effect of the smear layer treatment on dentin is different according to the wall and to the applied treatment.
authors.affiliation: Department of Operative Dentistry, School of Dentistry, University of São Paulo, Brazil.
authors.forename: M A
authors.initials: MA
authors.lastname: Luz
authors.forename: N G
authors.initials: NG
authors.lastname: Netto
authors.forename: V E
authors.initials: VE
authors.lastname: Arana-Chavez
mesh_terms: D000134:Acid Etching, Dental / Q000379:methods; D000293:Adolescent; D000328:Adult; D000388:Air; D000891:Anti-Infective Agents, Local / Q000008:administration & dosage; D001252:Astringents / Q000008:administration & dosage; D001840:Dental Bonding / Q000379:methods; D003737:Dental Cavity Preparation / Q000145:classification / Q000295:instrumentation / Q000379:methods*; D003743:Dental Enamel / Q000648:ultrastructure; D003786:Dental Pulp Cavity / Q000648:ultrastructure; D003804:Dentin / Q000648:ultrastructure*; D003368:Gossypium; D006801:Humans; D047348:Hydrolyzable Tannins / Q000008:administration & dosage; D008855:Microscopy, Electron, Scanning; D008964:Molar, Third; D010756:Phosphoric Acids / Q000008:administration & dosage; D016369:Smear Layer; D012967:Sodium Dodecyl Sulfate / Q000008:administration & dosage; D012973:Sodium Hypochlorite / Q000008:administration & dosage; D013501:Surface-Active Agents / Q000008:administration & dosage; D014867:Water
chemical_list: D000891:Anti-Infective Agents, Local; D001252:Astringents; D047348:Hydrolyzable Tannins; D010756:Phosphoric Acids; D013501:Surface-Active Agents; D014867:Water; D012967:Sodium Dodecyl Sulfate; D012973:Sodium Hypochlorite