Table 1 Mean post-manufacturing thickness (mm) of clear aligner materials measured across all water-immersion conditions (0 min to 2 weeks at 37 ° C). Final thickness values were recorded immediately prior to tensile testing and used in all stress calculations.

Water Exposure Time	n	Material Type
		3D Printing (Initial Design Thickness: 0.4 mm)			Thermoforming (Initial Sheet Thickness: 0.762 mm)
		TC-85	TR-07	TA-28	Zendura A	Zendura FLX
*0 min*	7	0.5900	0.5817	0.5767	0.4040	0.4120
*5 min*	7	0.6150	0.5833	0.5583	0.4420	0.4080
*30 min*	7	0.5917	0.5850	0.5717	0.4180	0.3780
*1 h*	7	0.5833	0.5733	0.5717	0.4283	0.3460
*3 h*	7	0.5850	0.5550	0.5717	0.3780	0.3840
*6 h*	7	0.5817	0.5650	0.5450	0.4083	0.3740
*9 h*	7	0.5683	0.5500	0.5567	0.4317	0.4180
*1 day*	7	0.5767	0.5700	0.5633	0.4050	0.3560
*3 days*	7	0.5683	0.5567	0.5667	0.3950	0.3580
*7 days*	7	0.5933	0.5700	0.5683	0.3850	0.3280
*10 days*	7	0.5867	0.5567	0.5533	0.4383	0.3960
*14 days*	7	0.5783	0.5200	0.5183	0.4360	0.4120
*Total Average*	77	*0.5849*	*0.5639*	*0.5601*	*0.4141*	*0.3808*

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