The effect of flowable resin as an intermediate liner on the micro-tensile bond strength between resin and dentin
XU Hai
ZHANG Guang-dong
Abstract：AIM:To investigate the effect of flowable resin as a liner on the micro-tensile bond strength between resin and dentin.METHODS:Occlusal surfaces of 30 human third molars were ground to obtain flat dentin surfaces.The dentin surfaces were randomly divided into 3 groups (n =1 0 ).Crowns of Z350 and Flowable Z350 (F350)with the thickness of 5 mm were prepared on the dentin surface of group A and group B respectively,the Crowns of group C were prepared by Z350 with a 1 mm layer of F350 between the crown and dentin surface.The sam-ples were thermocycled for 500 cycles (0~5 ℃ and 55 ~60 ℃),then standard specimens(1 0 mm ×1 mm ×1 mm) were prepared.Micro-tensile bonding strength (μTBS)was tested by an universal testing machine.Mode of failure was observed by stereoscopic light microscopy.RESULTS:TheμTBS(MPa)of group A,B and C was 40.86 ±4.01、41 .25 ±4.45 and 44.97 ±6.00 respectively(P>0.05),the fracture of most samples were at interface.CONCLU-SION:The use of an intermediate layer did not affect the bond strength between resin and dentin.
Keywords：flowable compositelinermicro tensile bonding strength
Publication Date：2016-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 626-628,606 )