Studies investigating restorations placed in the primary dentition showed no significant differences between the groups after 12 and 24 months .
In the permanent dentition , the longevity of ART restorations is equal to or greater than that of equivalent amalgam restorations for up to 6.3 years and is site-dependent .
No difference was observed in primary teeth .
The aim was to report on the longevity of  restorations placed using the atraumatic restorative treatment ( ART ) approach  compared with that of  equivalent placed amalgam restorations .
Comparison of atraumatic restorative treatment and conventional restorative procedures in a hospital clinic: evaluation after 30 months.
OBJECTIVE The purpose of this study was to evaluate two glass-ionomer cements placed in the occlusal surfaces of permanent molar teeth , using two cavity preparation methods . METHOD AND MATERIAL S Three dentists placed 149 restorations for 68 patients in a hospital clinic .  Atraumatic restorative treatment or conventional cavity preparation methods were used for two encapsulated , high-strength conventional glass-ionomer cements : Fuji IX GP and Ketac-Molar . Non-gamma 2 amalgam alloy was used in conventional preparations for comparison . RESULTS The restorative procedures were uneventful , but cavity preparations made with atraumatic restorative treatment h and instruments took approximately twice as long as did conventional rotary instrumentation . After 30 months , only one glass-ionomer cement restoration had failed . Both glass-ionomer cements showed high early losses of sealant material , but caries was not detected in the exposed fissures . Both glass-ionomer cements also showed relatively high restoration wear . At 30 months , the mean cumulative net occlusal wear was 119 + /- 12 mm for Fuji IX GP and 96 + /- 13 mm for Ketac-Molar ; the difference was not statistically significant . Color matching improved significantly by 6 months ; there was no significant difference in color match between the two glass-ionomer cements by 12 months . Minor surface tarnishing and marginal discrepancies were present in the amalgam restorations and increased with time . CONCLUSION The occlusal restorations performed satisfactorily over periods of up to 30 months . However , the continued deterioration of the cements requires longer-term studies to be undertaken
Studies investigating restorations placed in the primary dentition showed no significant differences between the groups after 12 and 24 months .
In the permanent dentition , the longevity of ART restorations is equal to or greater than that of equivalent amalgam restorations for up to 6.3 years and is site-dependent .
No difference was observed in primary teeth .
The aim was to report on the longevity of  restorations placed using the atraumatic restorative treatment ( ART ) approach  compared with that of  equivalent placed amalgam restorations .