Comparative study on bond strength of different kinds of universal adhesives to three kinds of dental hard tissues
BAI Hefei
ZHANG Yongjing
YE Hongqiang
LIU Yunsong
ZHOU Yongsheng
Abstract：Objective To compare the bond strength of two universal adhesives containing 10-Methacryloyloxydecyl Dihydrogen Phosphate(10-MDP)on enamel,dentin,and sclerotic dentin in elderly patients,aiming to provide clinical guidance for adhesive selection in restorative treatments for this population.Methods Forty non-carious,intact premolars extracted from elderly patients due to periodontitis were selected and randomly divided into an enamel group(Group A)and a dentin group(Group B),with 20 teeth each group.An additional 20 premolars were collected from elderly patients exhibiting cervical wedge-shaped defects and grade IV sclerotic dentin,and designated as the sclerotic dentin group.Each group was further divided into two subgroups(a Single Bond Universal adhesive subgroup and a Meiytin adhesive subgroup),with 10 teeth per subgroup.The buccal surface of each tooth was prepared for bonding.The teeth in the three Single Bond Universal subgroups were treated with Single Bond Universal adhesive,and the teeth in the three Meiytin subgroups were treated with Meiytin adhesive,followed by incremental placement of composite resin.The micro-tensile strength of specimens from each group was tested using a universal testing machine,and the failure modes were analyzed by stereomicroscope.The micro-tensile strength of 2 kinds of adhesives were performed using Two-way ANOVA analysis,with multiple comparisons conducted using the SNK-q test.The Kruskal-Wallis H test was used to compare the influence of the two adhesives on the failure modes in enamel,dentin,and sclerotic dentin.Results The bond strength results indicated that both Single Bond Universal and Meiytin Universal adhesives achieved clinically acceptable bond performance in the enamel,dentin,and sclerotic dentin groups.Furthermore,no statistically significant differences(P>0.05)were observed in the bond strength or fracture modes between the two adhesives at the three different dental hard tissue interfaces.Conclusion Universal adhesive systems containing MDP demonstrate equivalent bond performance in the enamel,dentin,and sclerotic dentin of elderly patients.This study provides experimental evidence to support the selection of restorative materials for the treatment of severe tooth wear in the aged population.
Keywords：micro-tensile strengthuniversal adhesivenoncarious sclerotic dentine
Publication Date：2026-01-20
Online Publishing Date：2026-02-04(First online date of this platform, not the publication date of the document)
Pages：6( 7-12 )