title: Evaluation of residual dentin after conventional and chemomechanical caries removal using SEM.
abstract: The purpose of this in vitro study was to analyze the residual dentinal surfaces following caries removal using rotatory instruments and two chemomechanical methods (Papacárie and Carisolv), by scanning electron microscopy (SEM). Thirty primary incisors were divided into three groups, according to the caries removal method used, and their residual dentin was examined under SEM (15). After caries removal, 15 of these teeth were restored with Single Bond (3M) adhesive system and Z100 Filtek composite resin (3M). The tags of the replicas were observed under SEM. The chemomechanical caries removal methods (Papacárie and Carisolv) formed an amorphous layer, similar to the smear layer and few exposed dentinal tubules; the conventional caries removal method produced a smooth and regular dentinal surface, with typical smear layer and exposed dentinal tubules. All groups showed abundant tag formation. Scanning electron microscopy analysis revealed a difference between dentin treated with rotatory instruments and that treated with chemomechanical methods in spite of the occurrence of a similar tag formation in both groups.
authors.affiliation: University of São Paulo. fenahas@usp.br
authors.forename: Fernanda Nahás Pires
authors.initials: FN
authors.lastname: Corrêa
authors.forename: Leonardo Eloy
authors.initials: LE
authors.lastname: Rodrigues Filho
authors.forename: Célia Regina Martins Delgado
authors.initials: CR
authors.lastname: Rodrigues
mesh_terms: D000293:Adolescent; D002648:Child; D002675:Child, Preschool; D003188:Composite Resins / Q000627:therapeutic use; D001840:Dental Bonding / Q000379:methods; D019140:Dental Care for Children / Q000379:methods; D003731:Dental Caries / Q000601:surgery*; D003737:Dental Cavity Preparation / Q000295:instrumentation / Q000379:methods*; D003762:Dental Instruments; D018772:Dental Marginal Adaptation; D003804:Dentin / Q000187:drug effects / Q000601:surgery / Q000648:ultrastructure*; D017220:Dentin-Bonding Agents / Q000627:therapeutic use; D018698:Glutamic Acid / Q000627:therapeutic use; D006801:Humans; D066298:In Vitro Techniques; D007180:Incisor; D007930:Leucine / Q000627:therapeutic use; D008239:Lysine / Q000627:therapeutic use; D010206:Papain / Q000627:therapeutic use; D013499:Surface Properties; D014094:Tooth, Deciduous / Q000187:drug effects / Q000601:surgery / Q000648:ultrastructure*
chemical_list: C119934:Carisolv; D003188:Composite Resins; D017220:Dentin-Bonding Agents; C509557:Papacarie; D018698:Glutamic Acid; D010206:Papain; D007930:Leucine; D008239:Lysine