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Table 2 Mean values and standard deviation of HVIT, H1, HM, EIT, and ηIT for all the products tested

From: Mechanical properties of orthodontic wires derived by instrumented indentation testing (IIT) according to ISO 14577

Material

Vickers hardness, HVIT(=0.0945 H IT) HV1

HM, (N/mm2)

E ΙΤ, (GPa)

η ΙΤ, (%)

AJW

475(36)1, a

545(8)1,2, b

2558(165)1

42.5(2.1)1

57.3(2.9)1,2

TRF

462(18)1,2, a

529(11)2, b

2656(76)1

49.7(0.9)2

47.0(0.7)3

POW

476(26)1, a

535(4)1,2, b

2211(85)2

34.3(1.3)3

58.2(0.4)2,4

SAW

430(6)2,3, a

528(7)2, b

2282(27)2

39.1(0.5)4

51.3(0.5)5

REM

429(13)2,3, a

601(3)3, b

2123(56)2

33.8(0.8)5

55.3(0.6)1

NOM

419(10)3, a

528(6)1,2, b

1831(36)3

27.1(0.5)6

64.4(0.9)6

RFR

304(2)4, a

333(5)4, b

1548(11)4

25.0(0.3)6

64.1(0.9)6

RFC

249(9)5, a

325(15)4, b

1287(32)5

21.0(0.4)7

59.8(0.3)4

BBA

309(14)4, a

330(9)4, b

1818(58)3

34.2(0.6)3

45.8(1.4)3

RES

397(22)3, a

488(21)5, b

2033(29)2

33.2(1.1)5

51.8(1.6)5

  1. Same numerical superscripts denote mean values without statistical significant differences among materials (P > 0.05). Same alphabetic superscripts illustrate no significant differences (P > 0.05) between HVIT and HV1