Figure 3. Activity of masseter and temporalis muscles during maximum bilateral clenching for the 5 different measurements. EMG values of left and right sides were summed for both muscles. EMG decreased for the masseter (p = 0.003) and temporalis muscle (p = 0.021) from old to new dentures without attachments. EMG increased for both temporalis and masseter when attachments were incorporated into the new denture (p < 0.001). EMG of the temporalis muscle is significantly lower than EMG of the masseter muscle for both the old (p = 0.012) and the new (p = 0.001) dentures without attachments. One-way ANOVA and post hoc tests were applied to test differences (n = 18).