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Shear bond strength values obtained when orthodontic ceramic bracket was bonded to enamel (CON0, CON1) or Y-TZP (CP0, CP1, U0, U1, CU0, CU1), with or without thermocycling (aging). The vertical bars indicate the standard deviations. There are significant differences in SBS between the groups marked with different letters A, a and b (p < 0.05).
