Research Article

Effects of Compressive and Tensile Strain on Macrophages during Simulated Orthodontic Tooth Movement

Figure 3

Impact of static pressure application (pressure) or tensile strain (tension) on Mmp-8 (a) and Mmp-9 (b) gene expression after 2, 4, 24, or 48 h of treatment. AU: arbitrary units; error bars: standard deviation; untreated: , 2 h–48 h: each ; , , and compared to untreated control. Statistics: Kruskal-Wallis test followed by Dunn’s multiple comparison post hoc tests.
(a)
(b)