Multiscale characterization of partially demineralized superficial and deep dentin surfaces

The objective of this study was to address the following question: ‘Which properties are modified in partially demineralized surfaces, compared with non‐demineralized dentin surfaces, following orthophosphoric acid‐etching as performed in clinical procedures?’. For this purpose, the complementary te...

Full description

Saved in:
Bibliographic Details
Published in:European journal of oral sciences 2013-08, Vol.121 (4), p.341-348
Main Authors: Pelin, Irina M., Trunfio-Sfarghiu, Ana-Maria, Farge, Pierre, Piednoir, Agnes, Pirat, Christophe, Ramos, Stella M. M.
Format: Article
Language:English
Subjects:
Acid Etching, Dental
apparent elastic modulus
Biomechanics
deep dentin
Dentin - chemistry
Dentistry
Elastic Modulus
Engineering Sciences
Humans
Mechanics
Microscopy, Atomic Force
Microscopy, Electron, Scanning
mineral/organic ratio
Molar, Third
Phosphoric Acids - adverse effects
Physics
Spectrometry, X-Ray Emission
superficial dentin
surface morphology
Surface Properties
Tooth Demineralization - chemically induced
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The objective of this study was to address the following question: ‘Which properties are modified in partially demineralized surfaces, compared with non‐demineralized dentin surfaces, following orthophosphoric acid‐etching as performed in clinical procedures?’. For this purpose, the complementary techniques atomic force microscopy/spectroscopy, scanning electron microscopy, energy‐dispersive X‐ray spectroscopy, and contact angle measurements were used to provide a multiscale characterization of the dentin substrate undergoing the acidic preconditioning designed to enhance wetting. Special attention was given to the influence of the etching pretreatment on the nanomechanical properties at different levels of dentin surfaces, in both dry and hydrated conditions. The four‐sided pyramid model (extended Hertz contact model) proved to be accurate for calculating the apparent Young's modulus, offering new information on the elasticity of dentin. The modulus value notably decreased following etching and surface hydration. This study underlines that after the acid etching pretreatment the contribution of the nanomechanical, morphological, and physicochemical modifications has a strong influence on the dentin adhesion properties and thus plays a significant role in the coupling of the adhesive–resin composite build‐up material at the dentin surface.
ISSN:0909-8836
1600-0722
DOI:10.1111/eos.12058