Evaluation of canine retraction following periodontal distraction using NiTi coil spring and implants – A clinical study

Abstract

Objective: To evaluate the amount of canine retraction with periodontal distraction using miniscrew implants and NiTi coil spring. Material and method: Sample comprised of 25 patients who were scheduled for all 1st premolar extraction (13 males and 12 females), in the age range of 16–22 years with mean age 18.8 ± 2.7 years. For each patient left side served as control side (Group I) and right side as experimental side (Group II). At the time of first premolar extraction, periodontal distraction was performed only on the experimental side, followed by retraction of canine from mini-implant by closed NiTi coil spring on both the sides. “Nemotech” software was used to evaluate the amount of canine retraction for a period of 3 months. Results: Significantly higher amount of tooth movement was seen from T0–T1 and from T1–T2 in Group II for the maxillary parameters 3C-5C, 6CF-3C, 3C-I/3C-J and for the mandibular parameter 6CF″-3C″. Whereas no significant amount of tooth movement was observed for maxillary and mandibular parameters between T2-T3 except for 6CF″-3C″ (p ≤ 0.01) which was significantly higher for the Group II. Conclusion: There was accelerated canine retraction on the periodontal distraction side as compared to the control side, with negligible anchorage loss.

Keywords

• Canine retraction
• Periodontal distraction
• RAP
• Acceleration of tooth movement
• Miniscrew implants