Evaluating of the Shear Bond Strength of Core Build-up Composites to Dentin

Diker B., Elter B.

44th Annual Conference of the European Prosthodontic Association , Athens, Greece, 30 September - 02 October 2021, pp.17

  • Publication Type: Conference Paper / Summary Text
  • City: Athens
  • Country: Greece
  • Page Numbers: pp.17
  • Bezmialem Vakıf University Affiliated: Yes


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