Effect of saliva contamination on microleakage after universal adhesive curing in class Ⅴ restorations
YANG Wen-li
LIU Xiao-ji
FENG Xiao-wei
GAN Kang
Abstract：Objective:The purpose of this study was to investigate the Effect of saliva contamination on microleakage at the gingival margin after universal adhesive curing in class Ⅴ restorations.Methods:A total of 50 fresh orthodontically extracted human premolars were included in this study.Class Ⅴ cavities were prepared with a cylindrical diamond bur on the facial surfaces of each tooth.Teeth were divided into five groups (10 in each group).A universal adhesive (Single Bond Universal,3M) was used.The adhesive was applied according to the instructions of manufacture under self-etch mode.In group A,Single Bond Universal was applied onto the surfaces directly as the control group.In other four groups,the surface of tooth was treated with the following methods after contaminated with artificial saliva for 10s.Group B,drying;Group C,water spraying and drying;Group D,water spraying,drying and reapplication of adhesive;Group E,water spraying,drying and re-etching and reapplication of adhesive.The cavities were restored with composite resin (FilteK Z350XT) after the adhesive system treatment.After cold and hot circulation and methylene blue solution dyeing for 24h.All teeth were cut in buccal-lingual direction and the degree of dye penetration was observed under stereomicroscope for the microleakage.Results:The present study revealed that the micro-leakage at the gingival margin in Group B and Group C were more than A group(P＜0.05).The micro-leakage at the gingival margin is no difference between A,D and E groups.(P＞0.05) Conclusion:Saliva contamination after universal adhesive curing could significantly increase the micro-leakage at the gingival margin in class Ⅴ restorations.When salivary contamination occurs,decontamination with rinsing,drying and reapplication of adhesive may reduce the micro-leakage at the gingival margin in class Ⅴ restorations.
Keywords：universal adhesivemicroleakagesaliva contaminationadhesive system
Publication Date：2018-03-02
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 98-101 )