Torque expression capacity of 0.018 and 0.022 bracket slots by changing archwire material and cross section

Arreghini, Angela; Lombardo, Luca; Mollica, Francesco; Siciliani, Giuseppe

doi:10.1186/s40510-014-0053-x

Progress in Orthodontics

Table 4 Analysis of archwire dimensions

From: Torque expression capacity of 0.018 and 0.022 bracket slots by changing archwire material and cross section

Archwire	Parameter	Stated size	Measured size (mm)	SD	Measured size (inch)	SD	% difference	Significant difference (P< 0.01)
SS .016×.016	Height	0.41	0.401	0.008	0.0158	0.0003	‒1.25	NS
SS .016×.016	Width	0.41	0.393	0.002	0.0155	0.0001	‒3.22	S
SS .016×.022	Height	0.41	0.411	0.003	0.0161	0.0001	1.13	NS
SS .016×.022	Width	0.56	0.558	0.003	0.0220	0.0001	‒0.14	NS
SS .017×.017	Height	0.43	0.434	0.002	0.0170	0.00007	0.51	S
SS .017×.017	Width	0.43	0.435	0.001	0.0171	0.0000	0.74	S
SS .017×.022	Height	0.43	0.430	0.002	0.0169	0.00008	‒0.34	NS
SS .017×.022	Width	0.56	0.552	0.001	0.0217	0.0000	‒1.28	S
SS .017×.025	Height	0.43	0.428	0.002	0.0168	0.00006	‒0.96	NS
SS .017×.025	Width	0.64	0.635	0.003	0.0250	0.0001	0.00	S
SS .018×.018	Height	0.46	0.458	0.001	0.0180	0.00002	0.25	S
SS .018×.018	Width	0.46	0.456	0.003	0.0180	0.0001	‒0.19	NS
SS .018×.022	Height	0.46	0.438	0.003	0.0172	0.00012	‒4.20	S
SS .018×.022	Width	0.56	0.554	0.002	0.0218	0.0001	‒0.80	S
SS .018×.025	Height	0.46	0.451	0.001	0.0177	0.00005	‒1.43	S
SS .018×.025	Width	0.64	0.636	0.003	0.0250	0.0001	0.16	NS
SS .019×.025	Height	0.48	0.488	0.001	0.0192	0.00004	1.12	S
SS .019×.025	Width	0.64	0.636	0.002	0.0250	0.0001	0.10	S
SS .021×.025	Height	0.53	0.539	0.002	0.0212	0.00006	0.99	S
SS .021×.025	Width	0.64	0.636	0.001	0.0250	0.0000	0.16	S
SS ST .016×.022	Height	0.41	0.404	0.001	0.0159	0.0003	‒0.59	S
SS ST .016×.022	Width	0.56	0.556	0.002	0.0218	0.0008	‒0.56	S
SS ST .018×.022	Height	0.46	0.445	0.001	0.0175	0.0006	‒2.74	S
SS ST .018×.022	Width	0.56	0.560	0.001	0.022	0,0006	0.27	NS
TMA .0175×.0175	Height	0.44	0.447	0.001	0.0176	0.00004	0.56	S
TMA .0175×.0175	Width	0.44	0.444	0.002	0.0175	0.0001	‒0.11	S
TMA .019×.025	Height	0.48	0.488	0.002	0.0192	0.00006	1.05	S
TMA .019×.025	Width	0.64	0.643	0.002	0.0253	0.0001	1.26	S
TMA .021×.025	Height	0.53	0.539	0.002	0.0212	0.00006	1.11	S
TMA .021×.025	Width	0.64	0.623	0.003	0.0245	0.0001	‒1.89	S
CuNiTi .016×.016	Height	0.41	0.415	0.001	0.0163	0.00004	2.12	S
CuNiTi .016×.016	Width	0.41	0.416	0.003	0.0164	0.0001	2.44	S
CuNiTi .017×.017	Height	0.43	0.425	0.001	0.0167	0.00002	‒1.65	S
CuNiTi .017×.017	Width	0.43	0.425	0.004	0.0167	0.0002	‒1.65	NS
Nitinol .017×.025	Height	0.43	0.432	0.001	0.0170	0.00004	0.05	S
Nitinol .017×.025	Width	0.64	0.639	0.001	0.0252	0.0000	0.63	NS
CuNiTi .018×.018	Height	0.46	0.449	0.001	0.0176	0.00005	‒1.87	S
CuNiTi .018×.018	Width	0.46	0.449	0.001	0.0177	0.0000	‒1.72	S
CuNiTi .018×.025	Height	0.46	0.456	0.001	0.0179	0.00004	‒0.26	S
CuNiTi .018×.025	Width	0.64	0.628	0.001	0.0247	0.0000	‒1.05	S
Nitinol Heat .019×.025	Height	0.48	0.477	0.002	0.0187	0.00006	‒1.09	S
Nitinol Heat .019×.025	Width	0.64	0.635	0.001	0.0250	0.0000	‒0.05	S
Nitinol SE .019×.025	Height	0.48	0.480	0.001	0.0189	0.00004	‒0.54	NS
Nitinol SE .019×.025	Width	0.64	0.601	0.058	0.0236	0.0023	‒5.41	NS
Nitinol Hybrid .019×.025	Height	0.48	0.485	0.004	0.0191	0.00016	0.57	NS
Nitinol Hybrid .019×.025	Width	0.64	0.625	0.004	0.0246	0.00016	‒1.57	S
Nitinol Heat .021×.025	Height	0.53	0.528	0.003	0.0207	0.00012	‒1.08	NS
Nitinol Heat .021×.025	Width	0.64	0.633	0.002	0.0249	0.0001	‒0.37	S

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