Table 2. Means and standard deviations (M±SD) expression in MDA units in the gingival tissue of the first lower left molar, according to each group, local treatment and period.

Group	Veh
Periods	7 days	15 days	30 days
Treatments
NT	0.18±0.06´°	0.24±0.12°	0.30±0.03°
SRP	0.28±0.12´°	0.40±0.09	0.62±0.13*
LLLT	0.48±0.32*´°	0.47±0.43*	0.34±0.17°
Group	S
Periods	7 days	15 days	30 days
Treatments
NT	0.34±0.07´°	0.36±0.16	0.44±0.08°
SRP	0.53±0.22´°	0.38±0.65	0.61±0.73*°
LLLT	0.72±0.54*´°	0.44±0.33*°	0.41±0.98°
N	60	60	60

#Difference among same groups and local treatments (ANOVA and p<0.05)

*Difference between local treatments, same group and period (ANOVA and Tukey, p<0.05)

´Difference between groups, same local treatment and period (ANOVA and Tukey, p<0.05)

°Difference between groups and local treatments, same period (ANOVA and Tukey, p<0.05)