Accession Number : AD1036433

Title :   Effect of a New Salivary Contaminant Removal Method on Bond Strength

Descriptive Note : Technical Report

Corporate Author : Uniformed Services University of the Health Sciences Bethesda United States

Personal Author(s) : Alfaro,Michael

Full Text :

Report Date : 31 Aug 2014

Pagination or Media Count : 20

Abstract : Intra-oral try-in procedures of etched glass-ceramic restorations frequently resultin salivary contamination which may decrease the bond strength of the resin cement. Numerous laboratory studies have concluded that the application of 37% phosphoric acid is an effective way to remove salivary contaminants. Ivoclean, a new product from Ivoclar Vivadent, offers an alternative to phosphoric-acid treatment. Objective: The purpose of this study was to evaluate the effect of various salivary-contaminant removal methods on the shear bond strength of resin cement to hydrofluoric-acid (HF) etched ceramic. Methods: One hundred fifty lithium disilicate blocks (e.max CAD, Ivoclar) were sectioned using a linear precision saw (Buehler) into block wafers, crystallized in a ceramic oven (Programat, Ivoclar), and mounted in plastic pipe using dental stone. Specimens (n=15) were divided into ten groups according to the differences in ceramic preparation and cleaning procedures. The surface of the ceramic was treated with various combinations of 6% hydrofluoric acid (VersaLink, Sultan), silane (VersaLink), 37% phosphoric acid, or Ivoclean. Resin cement (NX3, Kerr) was inserted into a mold (Ultradent) to a height of 3mm and light cured. Specimens were stored for 24 hours in 37 degrees Celsius distilled water and then tested in shear in a universal testing machine (Instron).

Descriptors :   dentistry , hydrofluoric acid , adhesives , contaminants , Dental prostheses , Saliva , ceramic materials , Adhesive bonding , Phosphoric acids

Subject Categories : Medicine and Medical Research

Distribution Statement : APPROVED FOR PUBLIC RELEASE