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 : https://apps.dtic.mil/dtic/tr/fulltext/u2/1036433.pdf


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