Research Information System
44th Annual Conference of the European Prosthodontic Association , Athens, Greece, 30 September - 02 October 2021, pp.17
Objectives of Investigation: The purpose of the present
study was to compare shear bond strength (SBS) of different
core build-up composites to dentin.
Methods Used: Thirty-six extracted, caries-free human molars’
occlusal surfaces were reduced with a double-sided diamond
disc until clean and flat dentin surfaces were exposed. A
round area of 3 mm in diameter were marked on the dentinal
surfaces and treated for adhesive systems. Five dual-curing
core build-up composites, Core X Flow (Dentsply), Oxford Zircore
Nano (Oxford Scientific), Oxford Flo Core (Oxford Scientific),
SDR Plus (Dentsply Sirona) and Clearfil DC Core Plus (Kuraray),
and one bulk-fill composite, Filtek Bulk-Fill Restorative (3M
ESPE) as a control group, were prepared in a cylindrical shape
on the treated dentinal areas. All samples were tested for SBS
in a universal testing machine (Shimadzu AGS-X Universal). Results: The SBSs of the study groups were not statistically
different from the control group (p>0,05) and no significant
difference was observed between the SBSs values of any core
build-up composite brands. The SBS values were the highest
with Filtek Bulk-Fill Restorative (mean 5.35 MPa), followed by
Core X Flow (4.45 MPa), Oxford Zircore Nano (4.25 Mpa), SDR
Plus (4.22 MPa), Clearfil DC Core Plus (3.16 MPa), and Oxford
Flo Core (2.90 MPa).
Conclusions: Although the dual-curing core build-up composites
used in the present study have different compositions,
shear bond strength to dentin was not different.
Keywords: composite resins; shear strength; dentin