2、 and evaluate the efficacy of 3M glass ionomer cements combined with photosensitive resin for restoration of severe damage in posterior tooth.Methods:268 damaged teethwere treated.The firster molar was covered with 3M glass ionomer cements,modified with acid and then wi
3、th a layer of photosensitive resin.Light6cure and further modification was applied.Results:The symptoms of sensitivity disappeared in all damaged tooth.Followed up to the 12th month after the restoration,the efficacy and the rate of satisfication ranged from 97.8%~100%
4、.Decayed teeth deleveoped in 0.7%.Conclusion:3M glass ionomer cements combined with photosensitive resin can be used effectively for restoration of severe damage in posterior tooth. Key wordsposterior tooth;restoration;glass ionomer;lightsensitive resin 后牙磨耗严重,牙本质暴露的