Document Detail


Comparative mechanical behavior of dentin enamel and dentin ceramic junctions assessed by speckle interferometry (SI).
MedLine Citation:
PMID:  22717295     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
OBJECTIVE: The dentin-enamel junction (DEJ) plays a crucial role in dental biomechanics; however, little is known about its structure and mechanical behavior. Nevertheless, natural teeth are a necessary model for prosthetic crowns. The mechanical behavior of the natural DEJ and the dentin ceramic junction (DCJ) manufactured with a CAD-CAM system are compared. METHODS: The reference samples undergo no modification, while the experimental samples were drilled to receive a cemented feldspathic ceramic crown. Longitudinally cut samples were used to achieve a planar object observation and to look "inside" the tooth. A complete apparatus enabling the study of the compressive mechanical behavior of the involved tooth by a non-contact laser speckle interferometry (SI) was developed to allow nanometric displacements to be tracked during the compression test. RESULTS: It is observed that the DEJ acted as a critical zone accommodating the movement between dentin and enamel. A smooth transition occurs between dentin and enamel. In the modeled prosthetic, the same kind of accommodation effects also occurs, but with a steeper transition slope between dentin and ceramic. SIGNIFICANCE: On the natural tooth, the stress accommodation arises from a differential behavior between enamel and dentin from the DEJ. In the ceramic crown, the cemented dentin-ceramic junction should play this role. This study demonstrates the possible realization of prosthetic crown reconstructions approaching biomechanical behaviors.
Authors:
Michel Fages; Pierre Slangen; Jacques Raynal; Stephane Corn; Kinga Turzo; Jacques Margerit; Frédéric J Cuisinier
Related Documents :
19686615 - Reading the small print - labelling recommendations for orthopaedic implants.
22100085 - Porcelain monolayers and porcelain/alumina bilayers reinforced by al(2)o(3)/gdalo(3) fi...
20881345 - Unusual presentation of active implant periapical lesions: a report of two cases.
2096895 - The evolution of implants over the last fifty years.
7239655 - Quantification and particle size distribution of inhaled fibres in the lung.
20638615 - A comparison in proximal tibial strain between metal-backed and all-polyethylene anatom...
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-6-18
Journal Detail:
Title:  Dental materials : official publication of the Academy of Dental Materials     Volume:  -     ISSN:  1879-0097     ISO Abbreviation:  -     Publication Date:  2012 Jun 
Date Detail:
Created Date:  2012-6-21     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8508040     Medline TA:  Dent Mater     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
Copyright © 2012 Academy of Dental Materials. Published by Elsevier Ltd. All rights reserved.
Affiliation:
EA4203, Department of Biologic Sciences, University of Montpellier I, Montpellier, France.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Descriptor/Qualifier:

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


Previous Document:  Anomalous origin of the right coronary artery and acute myocardial infarction: Cause or coincidence?
Next Document:  Using hyperbranched oligomer functionalized glass fillers to reduce shrinkage stress.