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© Pierre Lafaye
Astrocytes marqués par des anticorps VHH anti-GFAP. Des anticorps d'alpagas dirigés contre une protéine spécifique des astrocytes, la GFAP (Glial Fibrillary Acidic Protein), ont été obtenus à partir de camélidés immunisés. La partie VHH (partie de l'anticorps qui reconnaît l'antigène) a été exprimée sous forme recombinante chez Escherichia coli.
Publication : European journal of oral sciences

Influence of preliminary etching on the stability of bonds created by one-step self-etch bonding systems

Scientific Fields
Diseases
Organisms
Applications
Technique

Published in European journal of oral sciences - 21 Apr 2012

Taschner M, Nato F, Mazzoni A, Frankenberger R, Falconi M, Petschelt A, Breschi L

Link to Pubmed [PMID] – 22607341

Eur. J. Oral Sci. 2012 Jun;120(3):239-48

We evaluated the effects of preliminary etching of dentine on the stability of the bond created by one-step self-etch adhesives under different storage conditions. Adper Easy Bond (3M ESPE) and iBond Self-Etch (iBond SE; Heraeus Kulzer) were applied with an etch-and-rinse (i.e. after preliminary phosphoric acid etching for 15 s) or a self-etch approach. Resin-dentine bonded specimens were sectioned perpendicularly to the adhesive interface according to the ‘non-trimming technique’. Beams were stored in artificial saliva for 24 h, 6 months, or 1 yr at 37°C, or in 10% NaOCl for 5 h at room temperature, and then stressed until failure; the microtensile bond strengths were calculated. Interfacial nanoleakage of additional teeth was evaluated using light microscopy or transmission electron microscopy. Adper Easy Bond showed higher bond strength than iBond SE, regardless of the dentine treatment. Similar microtensile bond strength results were obtained for teeth subjected to artificial ageing in 10% NaOCl for 5 h at room temperature and for teeth stored in artificial saliva for 6 months at 37°C. The additional etching step increased the microtensile bond strength for Adper Easy Bond and iBond SE. This study supports the use of one-step adhesives on etched dentine because of the increased bond strength compared with their application onto smear-layer-covered dentine, regardless of storage conditions.

http://www.ncbi.nlm.nih.gov/pubmed/22607341