Table 1. Means and standard deviations of shear bond strength values after three recycling procedures with sandblast technique and laser .

Group	Time of recycling	Mean ± SD	95% Confidence interval (Lower‒Upper)
Sandblast	Pre-recycling	32.45 ± 2.01	28.13‒36.77
	First	25.58 ± 3.22	18.67‒32.49
	Second	26.34 ± 2.19	21.62‒31.05
	Third	30.75 ± 1.96	26.53‒34.96
Laser	Pre-recycling	35.42 ± 2.52	30.01‒40.83
	First	24.86 ± 1.98	20.60‒29.11
	Second	22.76 ± 1.78	18.94‒26.59
	Third	22.76 ± 1.51	19.51‒26.02