title: Resin infiltration of natural caries lesions.
abstract: Infiltration of non-cavitated caries lesions with light-curing resins could lead to an arrest of lesion progression. The aim of this study was to evaluate the penetration of a conventional adhesive into natural enamel caries after pre-treatment with two different etching gels in vitro. Extracted human molars and premolars showing proximal white-spot lesions were cut across the lesions perpendicular to the surface. Corresponding lesion halves were etched for 120 sec with either 37% phosphoric acid gel (H(3)PO(4)) or 15% hydrochloric acid gel (HCl), and subsequently infiltrated with an adhesive. Specimens were observed by confocal microscopy. Mean penetration depths (SD) in the HCl group [58 (37) microm] were significantly increased compared with those of the H(3)PO(4) group [18 (11) microm] (p < 0.001; Wilcoxon). It can be concluded that etching with 15% hydrochloric acid gel is more suitable than 37% phosphoric acid gel as a pre-treatment for caries lesions intended to be infiltrated.
authors.affiliation: Dept. of Operative Dentistry and Periodontology, University School of Dental Medicine, Campus Benjamin Franklin, Charité-Universitätsmedizin Berlin, Berlin, Germany.
authors.forename: S
authors.initials: S
authors.lastname: Paris
authors.forename: H
authors.initials: H
authors.lastname: Meyer-Lueckel
authors.forename: A M
authors.initials: AM
authors.lastname: Kielbassa
mesh_terms: D000134:Acid Etching, Dental / Q000379:methods*; D001641:Bicuspid; D003731:Dental Caries / Q000628:therapy*; D003743:Dental Enamel; D003745:Dental Enamel Permeability; D006801:Humans; D006851:Hydrochloric Acid; D008963:Molar; D010756:Phosphoric Acids; D019279:Resin Cements; D018709:Statistics, Nonparametric
chemical_list: D010756:Phosphoric Acids; D019279:Resin Cements; C030242:phosphoric acid; D006851:Hydrochloric Acid