Conclusions ART single-surface restorations  presented high survival percentages in both primary and permanent posterior teeth , whilst ART multiple-surface restorations presented lower survival percentages .
ART sealants presented a high-caries-preventive effect .
Clinical relevance ART is an effective evidence -based option for treating and preventing carious lesions in primary and permanent posterior teeth
Objective The aim of the present study is to up date the results of two previous meta-analyses , published in 2006 and 2012 , on the survival percentages of  atraumatic restorative treatment ( ART ) restorations and ART sealants .
The current meta- analysis includes Chinese publications not investigated before .
Influence of residual caries and cervical gaps on the survival rate of class II glass ionomer restorations
Aim : To assess the influence of different variables on the survival of class II glass ionomer cements ( GIC ) in a clinical study among 6–7 year old schoolchildren in and around Dar es Salaam , Tanzania . Methods : 217 children were r and omly divided into three groups . In the conventional group , Class-II cavities were excavated with burs , in the ART group they were excavated with h and instruments and in the Carisolv ™ group excavation took place with a chemical solution and special blunt h and instruments . The preparations in all groups were restored with h and mixed GIC ( Fuji IX ) by 4 operators . After restoration , residual caries and cervical gaps were assessed on bite-wing radiographs . The quality of the restorations was established and the survival rate determined in two subsequent evaluations . Results : 195 children ( 90 % ) were present at the first evaluation which took place after 7 months and 194 ( 89 % ) were present at the second evaluation , after one year . At the first evaluation the survival rate of the ART-restorations  was 38 % , of the conventional restorations 50 % , and of the Carisolv ™ restorations  35 % . Survival rates at the time of the second evaluation were 30 % , 42 % and 28 % respectively . The differences between the three treatment groups were , however , not significant ( p=0.200 at t=1 and p=0.247 at t=2 ) . In the first evaluation 161 bitewings were available of the 195 restorations , while for the second evaluation 130 . There was no significant relation between residual caries and the success/failure rate ( p=0.140 at t=1 and p=0.201 at t=2 ) . Also , cervical gaps appeared to have no relation with the failure rate ( p=0.057 at t=1 and p=0.833 at t=2 ) However , together those variables have a significant influence on the survival rate ( p = 0.025 ) . Conclusion : The combination of two variables ( residual caries and cervical gaps ) has considerable influence on the survival rate of class II GIC restorations compared to each variable alone
Conclusions ART single-surface restorations  presented high survival percentages in both primary and permanent posterior teeth , whilst ART multiple-surface restorations presented lower survival percentages .
ART sealants presented a high-caries-preventive effect .
Clinical relevance ART is an effective evidence -based option for treating and preventing carious lesions in primary and permanent posterior teeth
Objective The aim of the present study is to up date the results of two previous meta-analyses , published in 2006 and 2012 , on the survival percentages of  atraumatic restorative treatment ( ART ) restorations and ART sealants .
The current meta- analysis includes Chinese publications not investigated before .