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Title: Effect of Application Method on Adhesion of Low-shrinking Composites
Authors: Van Ende, Annelies
De Munck, Jan
Mine, A
Van Meerbeek, Bart #
Issue Date: Jul-2010
Conference: IADR 2010 location:Barcelona date:14-17 july 2010
Article number: 317
Abstract: Low-shrinking composites have recently been introduced, but the effect of using them in constrained conditions is still unclear. Objectives: To investigate the effect of curing time and filling method on the micro-tensile bond strength (µTBS) to cavity-bottom dentin in occlusal Class-I cavities. Methods: Two low-shrinking composites (Kalore, GC; N'Durance, Septodont) and a conventional composite (Filtek Z100, 3M-ESPE) were bonded into standardized occlusal Class-I cavities(4.2x4.2x2.5mm) using the one-step self-etch adhesive G-Bond (GC). The cavity was filled in bulk or in 3 separately cured layers. Bulk-filled cavities were cured for 20sec, as recommended by the manufacturer, or for 80 sec. After 1-week water storage, teeth were sectioned to 1x1 mm sticks for µTBS.

Conclusions: Overall, the conventional composite bonded least effective in constrained conditions and bond strength dropped by about 50% when applied and cured in bulk. Low-shrinking composites were less affected, though a combination of increased curing time and layered application consistently revealed the most favourable results.
Publication status: accepted
KU Leuven publication type: IMa
Appears in Collections:Biomaterials - BIOMAT
# (joint) last author

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