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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