Evaluation of canine retraction following periodontal distraction using NiTi coil spring and implants - A clinical study.
OBJECTIVE
To evaluate the amount of canine retraction with periodontal distraction using miniscrew implants and NiTi coil spring.


METHODS
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.


CONCLUSIONS
There was accelerated canine retraction on the periodontal distraction side as compared to the control side, with negligible anchorage loss.
Professor, Department of Orthodontics and Dentofacial Orthopedics, Babu Banarasi Das College of Dental Sciences, Lucknow, India.
Rohit
R
Khanna
Professor and Head of Department, Department of Orthodontics and Dentofacial Orthopedics, Babu Banarasi Das College of Dental Sciences, Lucknow, India.
Tripti
T
Tikku
Professor, Department of Orthodontics and Dentofacial Orthopedics, Babu Banarasi Das College of Dental Sciences, Lucknow, India.
Kiran
K
Sachan
Reader, Department of Orthodontics and Dentofacial Orthopedics, Babu Banarasi Das College of Dental Sciences, Flat No. 204, T.G. Campus; Khadra, Lucknow 226003, U.P., India.
R P
RP
Maurya
Senior Lecturer, Department of Orthodontics and Dentofacial Orthopedics, Babu Banarasi Das College of Dental Sciences, Lucknow, India.
Geeta
G
Verma
P.G. Student, Department of Orthodontics and Dentofacial Orthopedics, Babu Banarasi Das College of Dental Sciences, Lucknow, India.
Vivek
V
Ojha
Acceleration of tooth movement; Canine retraction; Miniscrew implants; Periodontal distraction; RAP