Dimensional variability of orthodontic slots and archwires: an analysis of torque expression and clinical implications

Progress in Orthodontics

Table 7 Results of one-way ANOVA comparing the values of torsional play between different groups

	Levene statistics (p value)	F statistics	p value	Group 1 vs Group 2	Group 1 vs Group 3	Group 2 vs Group 3
Torsional play for a 0.019 × 0.025 archwire in a UR1 bracket	0.008	55.271 *	< 0.001	^‡4.42* (< 0.001)	^‡2.41* (0.004)	^‡− 2.01* (0.012)
Torsional play for a 0.019 × 0.025 archwire in a UR3 bracket	0.003	57.566 *	< 0.001	^‡3.12* (< 0.001)	^‡− 1.67* (0.046)	^‡− 4.79* (0.001)
Torsional play for a 0.019 × 0.025 archwire in a UR4 bracket	0.007	23.613 *	< 0.001	^‡2.92* (< 0.001)	^‡1.51* (0.045)	^‡− 1.41 (0.051)
Torsional play for a 0.021 × 0.025 archwire in a UR1 bracket	0.892	108.144*	< 0.001	^†3.27* (< 0.001)	^†4.53* (< 0.001)	^†1.26* (0.005)
Torsional play for a 0.021 × 0.025 archwire in a UR3 bracket	0.754	20.019*	< 0.001	^†2.09* (< 0.001)	^†1.01* (0.025)	^†− 1.08* (0.017)
Torsional play for a 0.021 × 0.025 archwire in a UR4 bracket	0.871	68.683*	< 0.001	^†1.90* (< 0.001)	^†3.75* (< 0.001)	^†1.85* (< 0.001)

Group 1 Astar Orthodontics, Group 2 SIA, Group 3 Sweden & Martina, UR1 upper right central incisor bracket, UR3 upper right canine bracket, UR4 upper right first premolar bracket
*Statistically significant for p < 0.05
^†Mean difference in arc degrees (p value) from Tukey’s HSD post hoc test
^‡Mean difference in arc degrees (p value) from Games-Howell post hoc test