Table 3.
Sleep bruxism variables.
| Sleep Bruxism Variables |
Baseline (Mean ± SD) |
4 Weeks (Mean ± SD) |
12 Weeks (Mean ± SD) |
Time †
(p Value) |
Interaction * (p Value) |
|---|---|---|---|---|---|
| RMMA episode variables | |||||
| Episodes/h | 0.055 | 0.243 | |||
| Placebo | 3.26 ± 3.98 | 4.62 ± 3.52 | 2.33 ± 2.47 | 0.036 | |
| Treatment | 5.08 ± 4.20 | 4.81 ± 2.94 | 5.15 ± 5.06 | 0.813 | |
| Bursts/h | 0.291 | 0.261 | |||
| Placebo | 18.99 ± 26.60 | 25.34 ± 24.22 | 11.95 ± 14.59 | 0.110 | |
| Treatment | 40.72 ± 67.33 | 31.90 ± 38.42 | 45.63 ± 73.18 | 0.711 | |
| Bursts/episode | 0.609 | 0.780 | |||
| Placebo | 4.41 ± 1.65 | 4.36 ± 2.45 | 4.59 ± 1.30 | 0.435 | |
| Treatment | 6.01 ± 4.93 | 5.55 ± 3.04 | 6.24 ± 4.13 | 0.796 | |
| Episode duration (s) | 0.863 | 0.708 | |||
| Placebo | 5.25 ± 2.91 | 5.38 ± 2.88 | 5.20 ± 1.65 | 0.850 | |
| Treatment | 7.10 ± 5.45 | 5.54 ± 2.73 | 6.17 ± 3.93 | 0.715 | |
| Episodes sound | 0.563 | 0.137 | |||
| Placebo | 8.10 ± 17.78 | 9.30 ± 17.44 | 4.30 ± 12.22 | 0.490 | |
| Treatment | 16.69 ± 20.89 | 8.46 ± 15.25 | 18.15 ± 26.01 | 0.162 | |
| EMG variables | |||||
| MVC MA (μV) | < 0.0001 | 0.044 | |||
| Placebo | 118.00 ± 94.73 | 106.50 ± 105.94 | 92.00 ± 109.83 | 0.193 | |
| Treatment | 89.23 ± 55.86 | 38.08 ± 20.57 | 36.69 ± 24.44 | <0.0001 | |
| RMMA MA (μV) | < 0.0001 | 0.001 | |||
| Placebo | 71.46 ± 46.94 | 62.82 ± 32.98 | 61.42 ± 50.90 | 0.356 | |
| Treatment | 88.05 ± 70.25 | 29. 80 ± 13.94 | 37.24 ± 23.80 | < 0.0001 |
Abbreviations: RMMA, rhythmic masticatory muscle activity; EMG, electromyography; MVC MA, the peak amplitude of EMG burst in the masseter muscle during maximal voluntary clenching; RMMA MA, the peak amplitude of EMG burst in the masseter muscle during rhythmic masticatory muscle activity. Data are presented as mean ± standard deviation values and underwent log transformation for comparison. † Intragroup and * intergroup interactions were evaluated by repeated measures ANOVA.