The debonding of a thin film, glued to a rigid substratum by a soft adhesive, is known to proceed through the development of a regular array of micro-cavities. We propose a simple model of this phenomenon in the framework of the classical linear fracture mechanics. To cite this article: K.C. Le, L. Truskinovsky, C. R. Mecanique 336 (2008). © 2007 Académie des sciences. Published by Elsevier Mas...

This study presents a novel method to describe the microscale phenomenon of cracks initiation based on sensitivity analysis in laminate fiber-reinforced composites. The failure composite laminates often roots fiber/matrix interfacial debonding. micro-cracking and debonding composites are difficult detect both experimentally numerically. paper shows that stress response transverse ply with respe...

In this paper, micromechanical constitutive models are developed to predict the tensile and fatigue behavior of fiber-reinforced ceramic-matrix composites (CMCs) considering matrix fragmentation closure. Damage fragmentation, interface debonding, fiber’s failure considered in analysis response, closure, debonding repeated sliding hysteresis response. Relationships between established. Experimen...

OBJECTIVE To determine patient experience of pain during treatment with fixed orthodontic appliances, expectations of pain during debond and whether biting on a soft acrylic wafer during debond decreases pain experience. DESIGN Multicentre randomized controlled trial. SETTING Three UK hospital based orthodontic departments: Mid-Staffordshire NHS Foundation Trust, Birmingham Dental Hospital ...

The load-bearing capacity and failure types of indirect inlay-retained fixed dental prostheses (FDP), made of particulate filler composite (PFC) (Estenia) alone or reinforced with E-glass fibers impregnated with various monomers were evaluated. Indirect inlay-retained FDPs were made between first premolars and first molars (N=30, 10/per group). The inlay parts of the specimens were silica coate...

BACKGROUND Ozone water can be used to eliminate micro-organisms from the water systems in dental offices. OBJECTIVES To determine if ozone water diminishes the bond strength of orthodontic adhesives. METHODS One hundred and twenty bovine mandibular incisors were randomly divided into four equal groups. The teeth were cleaned with pumice and washed either with tap water (Groups 1 and 3) or w...

When a particle inclusion is embedded in a polymer matrix, the polymer tends to adsorb on the surface of the in-clusion. The effect of this may result in an interphasial zone between the particle and the polymer often referred toas “bound” rubber. The extent and composition of this zone depends on a number of factors, including the surfacearea and surface treatment of the partic...

Ceramic brackets have gained widespread acceptance in orthodontic treatment due to their superior aesthetic appeal. The immediate popularity of these brackets, after their initial marketing, was tempered by their potential to damage the enamel during debonding. This paper describes the design and development of a ceramic bracket that addresses the failings of most ceramic brackets on the market...

BACKGROUND AND OBJECTIVES The removal of all-ceramic crowns is a time consuming procedure in the dental office. Little research has been done in alternative removal techniques for all-ceramic crowns. The objective of the second phase of this proof-of-principle laboratory pilot study was to evaluate whether Ivoclar Vivadent all-ceramic crowns can be efficiently removed from natural teeth without...

Debonding-on-demand adhesives were designed by fabricating photochemical reversible bonds and using dynamic polymer cleavage flow generation mechanisms.