The outcomes showed a significant reduction of discomfort compared to baseline values for teeth of SG-3 immediately post treatment ( 82.6 % ) ( P < 0.001 ) , after 1 month ( 69.5 % ) ( P < 0.001 ) and after 6 months ( 60.8 % ) ( P < 0.001 ) , respectively , compared with the reduction scores of 51.6 % ( P < 0.001 ) , 29.7 % ( P < 0.05 ) and 4.7 % ( P > 0.05 ) , recorded for SG-1 ; 72.2 % , ( P < 0.001 ) , 62.5 % ( P < 0.001 ) , and 47.2 % ( P < 0.05 ) , recorded for SG-2 ; 77.4 % ( P < 0.001 ) , 56.1 % ( P < 0.001 ) , and 27.3 % ( P < 0.05 ) , recorded for SG-4 .