Macroscopic and radiographic aspects of orthodontic movement associated with corticotomy: animal study.

INTRODUCTION

To quantify the rate of tooth movement in two corticotomy protocols in an experimental model in rats through macroscopic and radiographic analysis.

METHODS

The animals were divided into three groups: orthodontic movement (CO), orthodontic movement plus corticotomy surgery (G2), and orthodontic movement and corticotomy surgery with decorticalization (G3).The euthanasia occurred in 7 and 14 days. The data were statistically analyzed (p < 0.05).

RESULTS

The CO presented lower distance between the mesial surface of the first molar and the distal surface of the third molar when compared to the G2 (6.96 ± 0.24, p = 0.009) and G3 (6.93 ± 0.18, p = 0.016) in the macroscopic analysis. In the 7 days, there was no statistically significant radiographic difference between the three groups: CO(0.94 ± 0.21 mm), G2(1.05 ± 0,27 mm), and G3(1.08 ± 0.27 mm).There was a statistically significant difference between CO (0.87 ± 0.12 mm), G2 (1.00 ± 0.12 mm), and G3 (1.11 ± 0.14 mm) at 14 days. There was a statistically significant linear difference between the groups in all periods.

CONCLUSION

Tooth movement and the region of interest were influenced by corticotomy, regardless of the surgical technique in the 14 days.