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 .
Survival Rate of Atraumatic Restorative Treatment (ART) Restorations Using a Glass Ionomer Bilayer Technique with a Nanofilled Coating: A Bi-center Randomized Clinical Trial.
PURPOSE The high-viscosity consistency of glass ionomer cement ( GIC ) contributes to its inappropriate adaptation , while the material 's premature exposure to humidity decreases its mechanical properties . This study 's purpose s were to : ( 1 ) investigate approximal atraumatic restorative treatment ( ART ) restorations ' survival in primary molars using two different insertion techniques and two surface protection material s ; and ( 2 ) compare the results of cities where treatments were performed . METHODS A total of 389 six- to seven-year-olds were selected from two cities in Brazil and r and omly assigned into four groups : ( 1 ) ART restorations plus petroleum jelly ( PJ ) ; ( 2 ) bilayer-ART restorations plus PJ ; ( 3 ) ART restorations plus nanofilled coating for GIC ( NC ) ; ( 4 ) bilayer-ART restorations plus NC . Restorations were evaluated after one , six , 12 , 18 , and 24 months . Kaplan-Meier survival analysis , log-rank test , and Cox regression analysis were performed . RESULTS Restorations ' cumulative survival was 46.4 percent . There was a higher survival of bilayer-ART restorations ( P=0.03 ) . No difference was observed between surface protection material s ( P=0.57 ) . Restorations made in Barueri were almost 2.5-fold more likely to survive than those from Recife ( P<0.001 ) . CONCLUSIONS The bilayer technique improves approximal ART restorations ' survival in primary molars . The nanofilled coating does not influence restorations ' survival rate , and the city where treatments were performed influences restoration survival
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 .