Clinical efficiency of nonconventional elastomeric ligatures in the canine retraction phase of preadjusted edgewise appliance therapy: an in-vivo study.
BACKGROUND
Various ligation techniques and materials have been shown to affect the frictional resistance and the rate of tooth movement with sliding mechanics for space closure. The aim of this study was to evaluate the clinical efficiency of nonconventional elastomeric ligatures and conventional elastomeric ligatures during the canine retraction phase by comparing the rates of canine retraction.


METHODS
The 20 patients (12 female, 8 male) in our sample had individual canine retraction (in the first premolar extraction space) in each quadrant (2 maxillary, 2 mandibular) with nonconventional elastomeric ligatures and conventional elastomeric ligatures on either side of the arch. The amount of canine retraction in each interval of 1 month was determined. The rate of canine retraction was calculated and subjected to statistical calculations.


RESULTS
The rates of canine retraction were higher with the nonconventional elastomeric ligatures. However, no statistically significant difference was observed in relation to the maxillary arch. Clinically, in most instances, canine retraction was completed in the same interval in both groups.


CONCLUSIONS
No significant difference in the rate of canine retraction was observed between the nonconventional elastomeric ligature and conventional elastomeric ligature groups in the maxillary arch. Clinically, the nonconventional elastomeric ligature group showed no reduction in time required for complete canine retraction in the maxillary and mandibular arches.
Department of Orthodontics, Nair Hospital Dental College, Mumbai, India. dholakia.kartik@gmail.com
Kartik D
KD
Dholakia
Kartik K
KK
Dholakia
Shweta R
SR
Bhat
D000293:Adolescent; D000704:Analysis of Variance; D003481:Cuspid / Q000502:physiology; D003799:Dental Stress Analysis; D020724:Elastomers; D005260:Female; D017276:Friction; D006801:Humans; D008297:Male; D008437:Maxilla; D016382:Orthodontic Appliance Design; D019516:Orthodontic Space Closure / Q000295:instrumentation*; D057887:Overbite / Q000628:therapy*; D013997:Time Factors; D014087:Tooth Movement Techniques / Q000295:instrumentation*; D055815:Young Adult
D020724:Elastomers