Table 3.
Mean and standard deviation (SD) corresponding to biomechanics variables (mm).
| Biomechanics variables | Trial 1 |
Trial 2 |
Trial 3 |
Trial 4 |
Trial 5 |
Significance (p) |
|||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Mean | SD | Mean | SD | Mean | SD | Mean | SD | Mean | SD | Intraexaminer | Interexaminer | ||
| Right side | |||||||||||||
| MUSCLE MOMENT ARM | Superficial masseter | 34.60 | 3.31 | 34.57 | 3.33 | 34.77 | 3.19 | 35.53 | 3.29 | 35.43 | 3.56 | 0.426 | 0.000 |
| Anterior deep masseter | 32.60 | 3.35 | 32.57 | 3.44 | 32.70 | 3.23 | 32.73 | 3.03 | 32.83 | 3.16 | 0.416 | 0.854 | |
| Posterior deep masseter | 14.43 | 3.08 | 14.37 | 3.35 | 14.67 | 3.13 | 14.90 | 2.06 | 14.33 | 2.99 | 0.119 | 0.475 | |
| Anterior temporal | 32.47 | 3.31 | 32.40 | 3.43 | 32.60 | 3.23 | 32.40 | 3.04 | 32.83 | 3.21 | 0.199 | 0.124 | |
| Posterior temporal | 28.83 | 2.91 | 28.80 | 2.89 | 28.87 | 2.96 | 28.17 | 2.93 | 28.70 | 3.05 | 0.794 | 0.001 | |
| Medial pterygoid | 37.73 | 2.39 | 37.17 | 2.93 | 37.10 | 2.93 | 37.33 | 2.90 | 38.20 | 2.61 | 0.055 | 0.170 | |
| Lateral pterygoid | 10.13 | 1.81 | 10.00 | 1.64 | 10.33 | 1.71 | 12.53 | 2.37 | 9.00 | 2.10 | 0.186 | 0.000 | |
| LOAD MOMENT ARM | Molar | 71.17 | 5.44 | 71.17 | 5.34 | 71.20 | 5.37 | 70.23 | 5.23 | 70.47 | 5.83 | 0.942 | 0.010 |
| Incisal | 103.13 | 5.42 | 103.27 | 5.07 | 103.33 | 5.27 | 103.53 | 5.38 | 103.83 | 5.23 | 0.575 | 0.034 | |
| MECHANICAL ADVANTAGE | Molar position |
||||||||||||
| Superficial masseter | 0.49 | 0.04 | 0.49 | 0.05 | 0.49 | 0.05 | 0.51 | 0.05 | 0.50 | 0.05 | 0.585 | 0.000 | |
| Anterior deep masseter | 0.46 | 0.04 | 0.46 | 0.05 | 0.46 | 0.04 | 0.47 | 0.04 | 0.47 | 0.04 | 0.766 | 0.001 | |
| Posterior deep masseter | 0.20 | 0.05 | 0.20 | 0.05 | 0.21 | 0.05 | 0.21 | 0.04 | 0.21 | 0.05 | 0.262 | 0.552 | |
| Anterior temporal | 0.46 | 0.04 | 0.46 | 0.04 | 0.46 | 0.04 | 0.46 | 0.04 | 0.47 | 0.04 | 0.616 | 0.022 | |
| Posterior temporal | 0.41 | 0.04 | 0.41 | 0.04 | 0.41 | 0.04 | 0.40 | 0.04 | 0.41 | 0.04 | 0.888 | 0.056 | |
| Medial pterygoid | 0.53 | 0.03 | 0.52 | 0.04 | 0.52 | 0.04 | 0.53 | 0.04 | 0.55 | 0.04 | 0.111 | 0.296 | |
| Lateral pterygoid | 0.14 | 0.03 | 0.14 | 0.03 | 0.15 | 0.03 | 0.18 | 0.03 | 0.13 | 0.03 | 0.141 | 0.000 | |
| Incisal position |
|||||||||||||
| Superficial masseter | 0.34 | 0.03 | 0.33 | 0.03 | 0.34 | 0.03 | 0.34 | 0.03 | 0.34 | 0.03 | 0.326 | 0.002 | |
| Anterior deep masseter | 0.32 | 0.03 | 0.32 | 0.03 | 0.32 | 0.02 | 0.32 | 0.03 | 0.32 | 0.03 | 0.589 | 0.868 | |
| Posterior deep masseter | 0.14 | 0.03 | 0.14 | 0.03 | 0.14 | 0.03 | 0.15 | 0.02 | 0.14 | 0.03 | 0.220 | 0.337 | |
| Anterior temporal | 0.31 | 0.03 | 0.31 | 0.03 | 0.32 | 0.03 | 0.31 | 0.03 | 0.32 | 0.03 | 0.238 | 0.358 | |
| Posterior temporal | 0.28 | 0.03 | 0.28 | 0.02 | 0.28 | 0.02 | 0.27 | 0.02 | 0.28 | 0.02 | 0.931 | 0.003 | |
| Medial pterygoid | 0.37 | 0.02 | 0.36 | 0.03 | 0.36 | 0.02 | 0.36 | 0.02 | 0.37 | 0.02 | 0.031 | 0.180 | |
| Lateral pterygoid | 0.10 | 0.02 | 0.10 | 0.02 | 0.10 | 0.02 | 0.12 | 0.02 | 0.09 | 0.02 | 0.254 | 0.000 | |
| Left side | |||||||||||||
| MUSCLE MOMENT ARM | Superficial masseter | 35.00 | 2.80 | 34.47 | 2.70 | 34.87 | 2.76 | 35.83 | 2.67 | 35.17 | 3.29 | 0.026 | 0.001 |
| Anterior deep masseter | 32.43 | 3.23 | 32.20 | 3.10 | 32.33 | 3.33 | 32.40 | 3.17 | 32.20 | 3.41 | 0.128 | 0.645 | |
| Posterior deep masseter | 14.03 | 2.34 | 14.23 | 2.46 | 14.47 | 2.33 | 14.53 | 2.21 | 13.43 | 2.57 | 0.193 | 0.008 | |
| Anterior temporal | 32.23 | 2.97 | 32.13 | 3.04 | 32.17 | 3.07 | 32.03 | 2.93 | 32.17 | 3.28 | 0.751 | 0.298 | |
| Posterior temporal | 28.33 | 2.60 | 28.27 | 2.64 | 28.33 | 2.55 | 27.80 | 2.92 | 28.17 | 3.25 | 0.766 | 0.018 | |
| Medial pterygoid | 37.63 | 2.83 | 37.73 | 2.88 | 37.90 | 2.77 | 37.90 | 2.77 | 38.30 | 2.93 | 0.267 | 0.482 | |
| Lateral pterygoid | 9.57 | 1.85 | 9.53 | 1.81 | 9.87 | 1.68 | 13.47 | 1.98 | 8.43 | 2.39 | 0.108 | 0.000 | |
| LOAD MOMENT ARM | Molar | 71.03 | 4.53 | 71.37 | 4.39 | 71.37 | 4.51 | 70.10 | 4.34 | 70.70 | 4.53 | 0.158 | 0.011 |
| Incisal | 103.03 | 4.66 | 103.10 | 4.42 | 103.13 | 4.55 | 103.23 | 4.52 | 103.63 | 4.52 | 0.814 | 0.364 | |
| MECHANICAL ADVANTAGE | Molar position | ||||||||||||
| Superficial masseter | 0.49 | 0.04 | 0.48 | 0.04 | 0.49 | 0.04 | 0.51 | 0.04 | 0.50 | 0.05 | 0.008 | 0.000 | |
| Anterior deep masseter | 0.46 | 0.04 | 0.45 | 0.04 | 0.45 | 0.04 | 0.46 | 0.04 | 0.46 | 0.04 | 0.017 | 0.046 | |
| Posterior deep masseter | 0.20 | 0.04 | 0.20 | 0.04 | 0.20 | 0.04 | 0.21 | 0.04 | 0.19 | 0.04 | 0.408 | 0.003 | |
| Anterior temporal | 0.45 | 0.04 | 0.45 | 0.04 | 0.45 | 0.04 | 0.46 | 0.04 | 0.46 | 0.04 | 0.128 | 0.673 | |
| Posterior temporal | 0.40 | 0.04 | 0.40 | 0.03 | 0.40 | 0.03 | 0.40 | 0.04 | 0.40 | 0.05 | 0.358 | 0.523 | |
| Medial pterygoid | 0.53 | 0.03 | 0.53 | 0.04 | 0.53 | 0.03 | 0.54 | 0.04 | 0.54 | 0.04 | 0.957 | 0.075 | |
| Lateral pterygoid | 0.14 | 0.03 | 0.13 | 0.03 | 0.14 | 0.03 | 0.19 | 0.03 | 0.12 | 0.04 | 0.317 | 0.000 | |
| Incisal position | |||||||||||||
| Superficial masseter | 0.34 | 0.03 | 0.33 | 0.03 | 0.34 | 0.03 | 0.35 | 0.03 | 0.34 | 0.03 | 0.085 | 0.001 | |
| Anterior deep masseter | 0.32 | 0.03 | 0.31 | 0.02 | 0.31 | 0.03 | 0.31 | 0.03 | 0.31 | 0.03 | 0.225 | 0.065 | |
| Posterior deep masseter | 0.14 | 0.03 | 0.14 | 0.02 | 0.14 | 0.02 | 0.14 | 0.02 | 0.13 | 0.03 | 0.343 | 0.021 | |
| Anterior temporal | 0.31 | 0.02 | 0.31 | 0.02 | 0.31 | 0.02 | 0.31 | 0.02 | 0.31 | 0.03 | 0.595 | 0.170 | |
| Posterior temporal | 0.28 | 0.02 | 0.27 | 0.02 | 0.27 | 0.02 | 0.27 | 0.02 | 0.27 | 0.03 | 0.673 | 0.006 | |
| Medial pterygoid | 0.37 | 0.02 | 0.37 | 0.02 | 0.37 | 0.02 | 0.37 | 0.02 | 0.37 | 0.02 | 0.486 | 0.757 | |
| Lateral pterygoid | 0.09 | 0.02 | 0.09 | 0.02 | 0.10 | 0.02 | 0.13 | 0.02 | 0.08 | 0.02 | 0.126 | 0.000 | |
p < 0.05 are shown in bold type.