Radiographic and histochemical assessment of root resorption during canine retraction through piezocision site.

Abstract

The number of adult patients seeking orthodontics treatment has increased drastically. There is increased need for faster tooth movement and good esthetics. Piezocision is one of the methods used for accelerating the rate of tooth movement. To assess the amount of root resorption after retraction of canine through piezocision site and compare it with that of recently extracted site using cone-beam computed tomography (CBCT) and assessment of dentin sialoprotein (DSP) levels in gingival crevicular fluid (GCF). A split mouth design was used in 15 patients who were undergoing first orthodontic treatment with premolar extractions. Randomly one of the sides was chosen as control (Group I) and the other side underwent piezocision procedure (Group II). 0.022 × 0.028'' MBT system was used with 0.017 × 0.025 SS wire for canine retraction using 150 grams of force. GCF samples were collected from mesio-buccal and disto-buccal of the canine with micropipette at baseline (TO) and day 90(T1) to detect the levels of DSP and the root resorption was measured using CBCT. Statistically significant amount of root resorption was observed after retraction in both the groups. DSP levels were increased in both the groups, though little higher in Group II when compared to group I. DSP level was increased on the piezocision side but it was statistically insignificant which suggests the amount of root resorption on both the sides is similar.