The effect of buccal corticotomy on accelerating orthodontic tooth movement of maxillary canine

Abstract

Background: Selective alveolar corticotomy is defined as an intentional injury to cortical bone.

This technique is an effective means of accelerating orthodontic tooth movement. The aim of this

study is to evaluate the effect of buccal corticotomy in accelerating maxillary canine retraction.

Materials and Methods: The sample in this clinical trial study consisted of 15 adult female

patients with therapeutic need for extraction of maxillary first premolars and maximum canine

retraction. By use of split‑mouth design, at the time of premolars extraction, buccal corticotomy

was performed around the maxillary first premolar, randomly on one side of maxilla, and the other

side was reserved as the control side. Canine retraction was performed by use of friction – less

mechanic with simple vertical loop. Every 2 weeks, distance between canines and second premolars

was measured until complete space closure. The velocity of space closure was calculated to evaluate

the effect of this technique in accelerating orthodontic tooth movement. The obtained data were

statistically analyzed using independent t‑test, and the significance was set at 0.05.

Results: The rate of canine retraction was significantly higher on the corticotomy side than the

control side by an average of 1.8 mm/month versus 1.1 mm/month in the corticotomy side and

control side, respectively (P < 0.001).

Conclusion: Based on result of this study, corticotomy can accelerates the rate of orthodontic

tooth movement about two times faster than conventional orthodontics and it is significant in

early stages after surgical porsedure. Therefore Buccal corticotomy is a useful adjunct technique

for accelerating orthodontic tooth movement.

Key Words: Accelerated, orthodontics, buccal, cortex, surgerycorticotomy, tooth movement