
Figure 1.
Orthodontic appliance in situ.

Figure 2.
3D model: A, The blue points refer to the superimposition points and measurements of molar rotation around its long axis. B, Measurement of orthodontic tooth movement, green point refer to T0, red point refer to T1.

Figure 3.
Comparison of OTM amount in all time points between groups I and II (E): experimental, (C) control.
Table I.
Comparison of tooth movements between experimental and control sides on each observational day (Mean ± SD) (mm)
| Group | Experimental | Control | P |
|---|---|---|---|
| Group I- Day 1 | 0.046 ± 0.009 | 0.026 ± 0.01 | 0.002* |
| Group I- Day 3 | 0.469 ± 0.024 | 0.341 ± 0.028 | 0.001** |
| Group I- Day 7 | 0.67 ± 0.024 | 0.456 ± 0.028 | 0.001** |
| Group I- Day 14 | 0.989 ± 0.045 | 0.54 ± 0.047 | 0.001** |
| Group I- Day 21 | 1.143 ± 0.054 | 0.93 ± 0.048 | 0.001** |
| Group II- Day 1 | 0.033 ± 0.008 | 0.026 ± 0.007 | 0.06 |
| Group II- Day 3 | 0.45 ± 0.039 | 0.346 ± 0.026 | 0.001** |
| Group II- Day 7 | 0.637 ± 0.039 | 0.444 ± 0.026 | 0.001** |
| Group II- Day 14 | 0.964 ± 0.067 | 0.552 ± 0.056 | 0.001** |
| Group II- Day 21 | 0.977 ± 0.035 | 0.866 ± 0.037 | 0.001** |
Table II.
Intragroup Comparison of OTM Amount (Mean ± SD) (mm)
| Group | Day 1 | Day 3 | Day 7 | Day 14 | Day 21 | |
|---|---|---|---|---|---|---|
| Experimental Side | HMWHA | 0.046 ± 0.009 | 0.47 ± 0.024 | 0.67 ± 0.024 | 0.989 ± 0.045 | 1.143 ± 0.054 |
| LMWHA | 0.033 ± 0.008 | 0.45 ± 0.039 | 0.637 ± 0.039 | 0.964 ± 0.067 | 0.977 ± 0.035 | |
| p | 0.009* | 0.165 | 0.07 | 0.233 | <0.001** | |
| Control Side | HMWHA | 0.026 ± 0.01 | 0.341 ± 0.028 | 0.456 ± 0.028 | 0.54 ± 0.047 | 0.93 ± 0.048 |
| LMWHA | 0.026 ± 0.007 | 0.346 ± 0.026 | 0.444 ± 0.026 | 0.552 ± 0.056 | 0.866 ± 0.037 | |
| p | 0.493 | 0.374 | 0.133 | 0.347 | 0.07 |
Table III.
BV/TV Percentage in Experimental and Control Groups (Mean ± SD) (%)
| Group | Experimental | Control | p |
|---|---|---|---|
| Group I- Day 1 | 47.254 ± 2.528 | 47.270 ± 2.205 | NS |
| Group I- Day 3 | 43.458 ± 2.44 | 42.050 ± 1.522 | NS |
| Group I- Day 7 | 29.164 ± 3.846 | 31.296 ± 3.828 | NS |
| Group I- Day 14 | 25.594 ± 3.562 | 31.088 ± 3.222 | 0.05* |
| Group I- Day 21 | 32.111 ± 0.7840 | 39.890 ± 2.068 | 0.05* |
| Group II- Day 1 | 47.884 ± 2.340 | 45.846 ± 2.727 | NS |
| Group II- Day 3 | 46.089 ± 3.447 | 46.168 ± 3.042 | NS |
| Group II- Day 7 | 26.818 ± 3.910 | 27.026 ± 3.489 | NS |
| Group II- Day 14 | 26.379 ± 3.757 | 32.386 ± 3.825 | 0.05* |
| Group II- Day 21 | 36.071 ± 2.632 | 39.459 ± 2.028 | 0.05* |

Figure 4.
Histologic images of osteoclast cells in interradicular area of maxillary molar on day 14 and 21: A, GI experimental side on day 14. B, GII experimental side on day 14. C, Saline injected side onday 14. D, GI experimental side on day 21. E, GII experimental side on day 21. F, Saline injected side on day 21.
Table IV.
Number of Osteoclasts in Study Groups (Mean ± SD) (+1/+5 Score)
| Experimental | Control | p | |
|---|---|---|---|
| Group I- Day 1 | 1.35 ± 0.17 | 1.34 ± 0.19 | p > 0.05 |
| Group I- Day 3 | 2.01 ± 0.32 | 1.89 ± 0.27 | p > 0.05 |
| Group I- Day 7 | 3.83 ± 0.41 | 2.5 ± 0.55 | p > 0.05 |
| Group I- Day 14 | 5 ± 0.89 | 2.5 ± 0.57 | p < 0.001** |
| Group I- Day 21 | 6.33 ± 0.81 | 3 ± 0.89 | p < 0.001** |
| Group II- Day 1 | 1.41 ± 0.23 | 1.36 ± 0.21 | p > 0.05 |
| Group II- Day 3 | 2.13 ± 0.29 | 1.74 ± 0.27 | p > 0.05 |
| Group II- Day 7 | 3.17 ± 0.75 | 2.33 ± 0.52 | p > 0.05 |
| Group II- Day 14 | 4.67 ± 1.21 | 2.83 ± 0.75 | p < 0.05* |
| Group II- Day 21 | 5.17 ± 1.17 | 3.33 ± 0.81 | p < 0.05* |

Figure 5.
RANKL/OPG ratios at experimental sides of groups I and II in each observation days.

Figure 6.
Histologic images of RANKL and OPG expression in interradicular area of maxillary molar on day 21: A, RANKL in GI experimental side. B, RANKL in GII experimental side. C, RANKL in Saline injected side. D, OPG in GI experimental side. E, OPG in GII experimental side. F, OPG in Saline injected side.
Table V.
RANKL/OPG Ratio in Study Group (Mean ± SD)
| Experimental | Control | p | |
|---|---|---|---|
| Group I- Day 1 | 1.08 ± 0.09 | 1.14 ± 0.23 | 0.336 |
| Group I- Day 3 | 1.14 ± 0.16 | 1.1 ± 0.23 | 0.387 |
| Group I- Day 7 | 1.06 ± 0.25 | 1.01 ± 0.23 | 0.297 |
| Group I- Day 14 | 1.17 ± 0.16 | 1.14 ± 0.18 | 0.044* |
| Group I- Day 21 | 1.45 ± 0.16 | 1.21 ± 0.15 | 0.03* |
| Group II- Day 1 | 1.01 ± 0.15 | 1.01 ± 0.15 | 0.481 |
| Group II- Day 3 | 1.21 ± 0.27 | 1.05 ± 0.16 | 0.161 |
| Group II- Day 7 | 1.2 ± 0.18 | 0.91 ± 0.12 | 0.021* |
| Group II- Day 14 | 1.28 ± 0.1 | 1.11 ± 0.14 | 0.043* |
| Group II- Day 21 | 1.37 ± 0.12 | 1.25 ± 0.18 | 0.048* |