Strain development in bulk-filled cavities of different depths characterized using a non-destructive acoustic emission approach.
作者： Annelies Van Ende , Diogo Pedrollo Lise , Jan De Munck , Johan Vanhulst , Martine Wevers
DOI: 10.1016/J.DENTAL.2016.12.012
关键词:
摘要: Abstract Objectives (1) To evaluate the effect of cavity depth and composite type on interfacial debonding in bulk-filled cavities. (2) correlate theoretical shrinkage stress level determined by acoustic emission (AE). Methods 80 sound molars were divided two groups to receive a Class-I (3.5 × 3.5 mm) with 2.5- or 4.0-mm depth. The cavities restored either conventional paste-like (Filtek Z100, 3M ESPE), flowable (G-aenial Universal Flo, GC), bulk-fill (Tetric EvoCeram Bulk Fill, Ivoclar Vivadent) (SDR, Dentsply) (n = 10). AE signals recorded from start curing for 20 min. cumulative number events was correlated maximum induced each composite. Two samples group scanned using micro-computed tomography (μCT) qualitatively evaluated. Results Both had significant influence AE. generated significantly more than other composites. increased sigmoidally function time, rapid increase after few seconds composites A strong linear correlation found between predicted values total both Representative μCT images showed larger de-bonding areas Significance Premature cohesive cracks can already develop during placement/curing This might compromise restoration integrity turn affect its survival long term. amount linearly
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