Effects of 405-, 532-, 650-, and 940-nm wavelengths of low-level laser therapies on orthodontic tooth movement in rats

Progress in Orthodontics

Table 3 Findings of the bone area measurement between the roots (μm²)

Group/variable	The bone area (BA)						95% confidence interval for mean							p
	Mean			S.D.			Lower bound				Upper bound
NC	0.351			0.059			0.289				0.413			0.020*
PC	0.467			0.135			0.354				0.581
405 nm	0.407			0.090			0.332				0.483
532 nm	0.447			0.106			0.316				0.579
650 mm	0.502			0.098			0.411				0.593
940 nm	0.594			0.124			0.480				0.709
Pairwise comparisons, p values
BA	NC-PC	NC-405 nm	NC-532 nm	NC-650 nm	NC-940 nm	PC-405 nm	PC-532 nm	PC-650 nm	PC-940 nm	405–532 nm	405–650 nm	405–940 nm	532–650 nm	532–940 nm	650–940 nm
	0.244	0.604	0.066	0.022*	0.003*	0.247	0.557	0.486	0.104	0.768	0.036*	0.015*	0.368	0.120	0.108

BA bone area between the roots, NC negative control group, PC positive control group, S.D. standard deviation
Significant degree: *p < 0.05