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Please use this identifier to cite or link to this item: http://hdl.handle.net/2262/63860

Title: Cuspal deflection and microleakage in premolar teeth restored with bulk-fill flowable resin-based composite base materials
Author: DOWLING, ADAM HENRY
FLEMING, GARRY
GRUFFERTY, BRENDAN FRANCIS
Author's Homepage: http://people.tcd.ie/flemingg
http://people.tcd.ie/ahdowlin
http://people.tcd.ie/gruffebf
Keywords: Dental Science
Cuspal deflection
gingival microleakage
resin-based composite
Issue Date: 2012
Publisher: Elsevier
Citation: Moorthy A, Hogg CH, Dowling AH, Grufferty BF, Benetti AR, Fleming GJP, Cuspal deflection and microleakage in premolar teeth restored with bulk-fill flowable resin-based composite base materials, Journal of Dentistry, 40, 6, 2012, 500 - 505
Series/Report no.: Journal of Dentistry;40, 6
Abstract: Objectives: To assess the cuspal deflection and cervical microleakage of standardised Class II cavities incrementally filled with a dimethacrylate RBC or bulk-fill flowable RBC bases. Methods: Twenty-four sound upper premolar teeth with Class II cavities were allocated to three groups (n = 8). Restoration of the teeth involved the placement of an RBC (GrandioSO) in eight oblique increments (Group A) or Groups B and C were restored to within 2 mm of the palatal cusp in a single increment with bulk-fill flowable RBC bases (SDR and x-tra base) before the two occlusal cavity increments were placed with GrandioSO. Buccal and palatal cusp deflections were recorded postirradiation using a twin channel deflection measuring gauge. Following restoration, the teeth were thermocycled, immersed in 0.2% basic fuchsin dye for 24 h, sectioned and examined for cervical microleakage Results: The mean total cuspal deflection for the oblique incremental restoration technique was 11.26 (2.56) μm (Group A) and 4.63 (1.19) μm (Group B) and 4.73 (0.99) μm (Group C) for the bulk-fill flowable RBC bases. A significant increase in the mean total cuspal deflection for the incrementally filled GrandioSO compared with the SDR (P = 0.007) and x-tra base (P = 0.005) restored teeth was evident. No significant difference in the cervical microleakage scores were recorded between groups AC (P > 0.05). Conclusions: The bulk-fill flowable RBC bases significantly reduced cuspal deflection compared with a conventional RBC restored in an oblique incremental filling technique with no associated change in cervical microleakage recorded.
Description: PUBLISHED
URI: http://hdl.handle.net/2262/63860
Related links: http://dx.doi.org/10.1016/j.jdent.2012.02.015
Appears in Collections:Dental Science (Scholarly Publications)

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