Table 2 Tensile forces (N) at 1%, 2%, and 3% strain levels for clear aligner materials at 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

Strain

(%)

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

0.1

TC-85

18.62

13.58

10.30

8.54

5.34

3.85

3.65

2.88

3.87

4.97

3.78

4.04

TR-07

20.96

17.27

12.23

10.68

7.91

6.06

6.09

6.10

6.10

7.85

5.89

7.24

TA-28

23.84

17.37

10.91

11.16

5.50

3.38

3.88

3.11

2.91

4.14

3.70

3.67

Zendura A

28.09

27.01

23.46

26.46

21.37

22.89

24.12

25.09

23.62

28.41

31.10

26.26

Zendura FLX

13.08

11.97

9.62

11.53

10.62

11.79

12.70

10.42

9.95

11.59

16.28

14.36

0.2

TC-85

31.58

22.16

17.39

13.66

8.10

5.63

5.34

4.54

5.83

6.91

5.72

6.00

TR-07

37.56

28.79

21.10

17.76

12.18

9.54

9.12

9.90

9.56

11.25

9.11

11.11

TA-28

43.38

29.17

19.36

18.13

8.15

4.74

5.22

4.57

4.32

5.62

5.33

5.33

Zendura A

47.60

49.88

44.23

49.24

40.48

43.73

46.31

47.47

44.36

50.18

55.59

48.74

Zendura FLX

23.53

21.55

19.28

20.63

19.90

21.50

23.40

19.53

18.99

20.30

26.63

25.57

0.3

TC-85

39.85

27.50

21.88

16.80

9.86

6.84

6.50

5.77

7.05

8.16

6.97

7.30

TR-07

48.78

35.91

26.58

22.16

14.83

11.92

11.16

12.35

11.79

13.26

11.27

13.48

TA-28

56.34

36.51

25.02

22.16

9.86

5.81

6.21

5.61

5.31

6.68

6.36

6.42

Zendura A

59.87

65.70

58.26

64.91

53.75

58.47

62.13

63.53

59.63

66.17

73.86

65.23

Zendura FLX

29.61

27.00

25.55

25.91

25.97

27.38

30.06

25.57

25.36

26.23

33.07

32.91

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