title: Evaluation of over-etching technique in the endodontically treated tooth restoration.
abstract: The main purpose of a post-endodontic restoration with posts is to guarantee the retention of the restorative material. The aim of the study was to examine, through the push-out test, how bond strength between the post and the dentin varied with etching time with 37% orthophosphoric acid, before cementation of a glass fiber post. Moreover, it has been examined if over-etching (application time of the acid: 2 minutes) was an effective technique to improve the adhesion to the endodontic substrate, after highlighting the problems of adhesion concerning its anatomical characteristics and the changes after the endodontic treatment. Highest bond strength values were found by etching the substrate for 30 sec., while over-etching didn't improve bond strength to the endodontic substrate.
authors.affiliation: Department of Oral and Maxillo Facial Sciences, School of Dentistry, "Sapienza" University of Rome, Italy.
authors.forename: Guido
authors.initials: G
authors.lastname: Migliau
authors.affiliation: Department of Oral and Maxillo Facial Sciences, School of Dentistry, "Sapienza" University of Rome, Italy.
authors.forename: Luca
authors.initials: L
authors.lastname: Piccoli
authors.affiliation: Department of Oral and Maxillo Facial Sciences, School of Dentistry, "Sapienza" University of Rome, Italy.
authors.forename: Laith Konstantinos
authors.initials: LK
authors.lastname: Besharat
authors.affiliation: Department of Oral and Maxillo Facial Sciences, School of Dentistry, "Sapienza" University of Rome, Italy.
authors.forename: Stefano
authors.initials: S
authors.lastname: Di Carlo
authors.affiliation: Department of Oral and Maxillo Facial Sciences, School of Dentistry, "Sapienza" University of Rome, Italy.
authors.forename: Giorgio
authors.initials: G
authors.lastname: Pompa
keywords: dental bonding; endodontic substrate; etching time; glass fiber posts