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sEMG activity of masseter muscle clenching between different bracket types.
| Masseter muscle evaluation | Mean difference | 95% CI for difference | F (df) | P value | |
|---|---|---|---|---|---|
| Lower bound | Upper bound | ||||
| Conventional bracket-self-ligating bracket | 16.48 | -14.29 | 47.25 | 1.69 (6.46, 58.15) | 0.134 |
| Conventional bracket-ceramic bracket | 3.88 | -26.89 | 34.65 | ||
| Self-ligating bracket ceramic bracket | -12.60 | -43.37 | 18.17 | ||
CI = confidence interval; df = degree of freedom.
