Table 4 Ultimate tensile strength (MPa) of different clear aligner materials with varied water immersion times.

From: Mechanical properties of thermoformed and direct-printed aligner materials after immersion in 37 °C water: a 14-day in vitro study

Clear Aligner Materials

Immersed Time in 37° C Water Bath

0 min

5 min

30 min

1 h

3 h

6 h

9 h

1 day

3 days

7 days

10 days

14 days

TC-85

24.29 ± 2.681

23.44 ± 2.909

23.34 ± 3.219

21.81 ± 3.298

20.07 ± 2.439

16.19 ± 2.497

16.96 ± 2.017

14.38 ± 1.794

16.96 ± 3.003

16.64 ± 1.723

19.00 ± 4.468

21.84 ± 3.306

TR-07

29.2 ± 0.9126

25.12 ± 3.855

22.45 ± 1.848

24.18 ± 1.139

17.6 ± 1.747

18.83 ± 2.870

19.61 ± 3.756

18.70 ± 2.288

17.00 ± 1.769

17.79 ± 3.243

17.54 ± 2.101

20.04 ± 3.251

TA-28

35.06 ± 3.080

30.25 ± 1.973

31.00 ± 5.384

30.06 ± 3.307

31.54 ± 7.144

24.15 ± 2.850

25.3 ± 1.499

22.23 ± 4.316

22.47 ± 3.890

23.62 ± 2.421

21.52 ± 2.442

27.2 ± 5.159

Zendura A

70.46 ± 5.577

70.9 ± 7.159

63.58 ± 11.26

72.44 ± 10.95

70.73 ± 11.00

65.15 ± 4.189

63.59 ± 7.269

71.37 ± 5.890

58.76 ± 6.075

69.31 ± 10.20

68.74 ± 4.880

67.176 ± 7.500

Zendura FLX

35.9 ± 2.681

32.39 ± 2.909

33.97 ± 3.219

37.29 ± 3.298

33.19 ± 2.439

34.95 ± 2.497

34.3 ± 2.017

33.54 ± 1.794

31.97 ± 3.003

34.14 ± 1.723

35.69 ± 4.468

33.87 ± 3.306

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