Title: Bulk-filling of high C-factor posterior cavities: effect on
Authors: Van Ende, Annelies
De Munck, Jan
Van Landuyt, Kirsten
Poitevin, André
Peumans, Marleen
Van Meerbeek, Bart # ×
Issue Date: 2012
Publisher: Munksgaard
Series Title: Dental Materials
Abstract: Objectives: To evaluate the effect of bulk-filling high Cfactor
posterior cavities on adhesion to cavity-bottom dentin. Methods: A
universal flowable composite (G-anial Universal Flo, GC), a bulk-fill
flowable base composite (SDR Posterior Bulk Fill Flowable Base, Dentsply)
and a conventional paste-like composite (Z100, 3M ESPE) were bonded (Ganial
Bond, GC) into standardized cavities with different cavity
configurations (C-factors), namely C=3.86 (Class-I cavity of 2.5 mm deep,
bulk-filled), C=5.57 (Class-I cavity of 4 mm deep, bulk-filled), C=1.95
(Class-I cavity of 2.5 mm deep, filled in three equal layers) and C=0.26
(flat surface). After one-week water storage, the restorations were
sectioned in 4 rectangular micro-specimens and subjected to a microtensile
bond strength (ƒÊTBS) test. Results: Highly significant
differences were found between pairs of means of the experimental groups
(Kruskal-Wallis, p<0.0001). Using the bulk-fill flowable base composite
SDR (Dentsply), no significant differences in ƒÊTBS were measured among
all cavity configurations (p>0.05). Using the universal flowable
composite G-anial Universal Flo (GC) and the conventional paste-like
composite Z100 (3M ESPE), the ƒÊTBS to cavity-bottom dentin was not
significantly different from that of SDR (Dentsply) when the cavities
were layer-filled or the flat surface was build up in layers; it was
however significantly lower when the Class-I cavities were filled in
bulk, irrespective of cavity depth. Significance: The filling technique
and composite type may have a great impact on the adhesion of the
composite, in particular in high C-factor cavities. While the bulk-fill
flowable base composite provided satisfactory bond strengths regardless
of filling technique and cavity depth, adhesion failed when conventional
composites were used in bulk.
ISSN: 0109-5641
Publication status: submitted
KU Leuven publication type: IT
Appears in Collections:Biomaterials - BIOMAT
× corresponding author
# (joint) last author

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