title: Influence of dentin pretreatment with synthetic hydroxyapatite application on the bond strength of fiber posts luted with 10-methacryloyloxydecyl dihydrogen phosphate-containing luting systems.
abstract: The aim of this in vitro study was evaluate the effect of application of synthetic hydroxyapatite on fiber post bond strength to radicular dentine. Forty, single-root teeth were endodontically treated and an 8 mm post space was prepared. Specimens were randomly placed in four groups (n = 10 in each) and treated using the following fiber post luting procedures: group 1, 17% EDTA + Panavia SA; group 2, 17% EDTA + Teethmate Desensitizer + Panavia SA; group 3, All-Bond Universal + Duo-Link Universal; and group 4, All-Bond Universal + Teethmate Desensitizer + Duo-Link Universal. Fiber posts were luted in the post space and light-cured for 120 s using a light-emitting diode (LED) lamp. After 7 d of storage at 37°C, the teeth were cut into 1-mm-thick slices, which were subjected to a push-out test until failure using a universal testing machine. Two specimens per group were prepared for scanning electron microscopy analysis. An energy-dispersive X-ray spectroscopy detector was used for elemental analysis of the specimen surface. The results were statistically analyzed using one-way anova. The fiber post bond strength was statistically significantly increased after the application of Teethmate Desensitizer to post space walls, either with a 10-MDP-containing self-adhesive cement or with a universal adhesive. Scanning electron microscopy and EDAX analysis showed that Teethmate Desensitizer created a calcium phosphate precipitate over post space dentinal tubules, which significantly improved the bond strength of the fiber post luted with 10-methacryloyloxydecyl dihydrogen phosphate (10-MDP)-containing adhesive systems.
authors: Department of Surgical Sciences, Dental School, Restorative Dentistry, University of Turin, Turin, Italy. nicola.scotti@unito.it.
authors: Nicola
authors: N
authors: Scotti
authors: Department of Surgical Sciences, Dental School, Restorative Dentistry, University of Turin, Turin, Italy.
authors: Emanuele
authors: E
authors: Bergantin
authors: Department of Surgical Sciences, Dental School, Restorative Dentistry, University of Turin, Turin, Italy.
authors: Riccardo
authors: R
authors: Tempesta
authors: Department of Biomedicine, Unit of Dental Sciences and Biomaterials, University of Trieste, Trieste, Italy.
authors: Gianluca
authors: G
authors: Turco
authors: Department of Biomedical and Neuromotor Sciences, DIBINEM, University of Bologna and IGM-CNR, Unit of Bologna, Bologna, Italy.
authors: Lorenzo
authors: L
authors: Breschi
authors: Department of Epidemiology - ASL To3, Grugliasco (Torino), Italy.
authors: Elena
authors: E
authors: Farina
authors: Department of Surgical Sciences, Dental School, Restorative Dentistry, University of Turin, Turin, Italy.
authors: Damiano
authors: D
authors: Pasqualini
authors: Department of Surgical Sciences, Dental School, Restorative Dentistry, University of Turin, Turin, Italy.
authors: Elio
authors: E
authors: Berutti
mesh_terms: D001840:Dental Bonding; D003804:Dentin; D017220:Dentin-Bonding Agents; D017886:Durapatite; D005898:Glass; D006801:Humans; D008422:Materials Testing; D008689:Methacrylates; D011176:Post and Core Technique; D019279:Resin Cements
chemical_list: D017220:Dentin-Bonding Agents; D008689:Methacrylates; D019279:Resin Cements; C069749:methacryloyloxydecyl dihydrogen phosphate; D017886:Durapatite
keywords: 1-MDP; fiber post; push out; universal adhesive