OBJECTIVES: To evaluate the effect of bulk-filling high C-factor posterior cavities on adhesion to cavity-bottom dentin. METHODS: A universal flowable composite (G-ænial 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 (G-ænial Bond, GC) into standardized cavities with different cavity configurations (C-factors), namely C=3.86 (Class-I cavity of 2.5mm deep, bulk-filled), C=5.57 (Class-I cavity of 4mm deep, bulk-filled), C=1.95 (Class-I cavity of 2.5mm 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 micro-tensile bond strength (μTBS) 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 μTBS were measured among all cavity configurations (p>0.05). Using the universal flowable composite G-ænial Universal Flo (GC) and the conventional paste-like composite Z100 (3M ESPE), the μTBS 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.
OBJECTIVES: To evaluate the effect of bulk-filling high C-factor posterior cavities on adhesion to cavity-bottom dentin. METHODS: A universal flowable composite (G-ænial 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 (G-ænial Bond, GC) into standardized cavities with different cavity configurations (C-factors), namely C=3.86 (Class-I cavity of 2.5mm deep, bulk-filled), C=5.57 (Class-I cavity of 4mm deep, bulk-filled), C=1.95 (Class-I cavity of 2.5mm 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 micro-tensile bond strength (μTBS) 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 μTBS were measured among all cavity configurations (p>0.05). Using the universal flowable composite G-ænial Universal Flo (GC) and the conventional paste-like composite Z100 (3M ESPE), the μTBS 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.
Authors: Tarek A Omran; Sufyan Garoushi; Aous A Abdulmajeed; Lippo V Lassila; Pekka K Vallittu Journal: Clin Oral Investig Date: 2016-09-10 Impact factor: 3.573
Authors: Vilhelm G Ólafsson; André V Ritter; Edward J Swift; Lee W Boushell; Ching-Chang Ko; Gabrielle R Jackson; Sumitha N Ahmed; Terence E Donovan Journal: J Esthet Restor Dent Date: 2017-10-16 Impact factor: 2.843
Authors: Vesna Miletic; Pong Pongprueksa; Jan De Munck; Neil R Brooks; Bart Van Meerbeek Journal: Clin Oral Investig Date: 2016-07-06 Impact factor: 3.573
Authors: Márcia de Almeida Durão; Ana Karina Maciel de Andrade; Maria do Carmo Moreira da Silva Santos; Marcos Antônio Japiassú Resende Montes; Gabriela Queiroz de Melo Monteiro Journal: Eur J Dent Date: 2020-11-26