Title
Materials for minimally invasive treatments Materials for minimally invasive treatments
Author
Faculty/Department
Faculty of Medicine and Health Sciences
Publication type
bookPart
Publication
Chicago, Calif. :Quintessence, [*]
Subject
Human medicine
Source (book)
Adhesive technology for restorative dentistry / Roulet, J.F. [edit.]; et al. [edit.]
ISBN - Hoofdstuk
1-85097-107-2
ISI
000226860200006
Carrier
E
Target language
English (eng)
Affiliation
University of Antwerp
Abstract
Materials for minimally invasive treatments should be able to withstand the same masticatory forces exerted on their occlusal contact surfaces as do materials selected for large cavities. Due to cavity geometry; in the case of adhesive bonding of a small restoration, one can expect increased internal stresses, at least when there is insufficient or no flow compensation. The results of in vitro tests of Young's modulus and fatigue limits of various restorative materials show that, in view of the physiological stresses, a more rapid fatigue failure is likely to occur within the group of conventional glass-ionomer restoratives. With the help of scanning electron microscopy, the fracture surfaces also reveal that the manipulation of the material by the clinician, often yields to internal defects that will render the restoration more prone to fatigue failure. This chapter discusses the stresses that occur in restorative materials at the surface and subsurface levels following occlusal contacts and thereby focuses on crack-growth phenomena. Since crack growth is suspected of playing a role in wear processes, it is of primary importance in the understanding of damage accumulation in restorative materials.
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