Teeth; Anomaly, Position Clinical Trial
Official title:
A Clinical Comparison of the Effectiveness of Two Types of Orthodontic Aligning Archwire Materials: A Randomized Clinical Trial
The aim of this study is to compare the effectiveness of using heat-activated NiTi with
superelastic NiTi archwires during the initial phase of orthodontic treatment.
Primary Objective:
To compare the difference in the amount of crowding in the lower incisors after 4 and 8 weeks
from the start of treatment.
Secondary Objectives:
1. To compare the amount of orthodontically-induced inflammatory root resorption (OIIRR) in
the apical region of mandibular central incisors between the two groups of archwires
2. To compare the amount of pain perception between the two groups of archwires during the
1st week after each wire placement.
Objectives: To compare the heat-activated nickel titanium (HANT) with superelastic nickel
titanium (SENT) archwires in terms of their effectiveness in aligning teeth, possibility of
inducing root resorption, and patient perception of pain during the initial phase of
treatment.
Subjects and Methods: Orthodontic patient aged 12 years or over with lower anterior crowding
of 3-6 mm. who need treatment without extraction, were randomly allocated to the HANT and
SENT archwires groups with a 1:1 allocation ratio. Archwire sequence in both groups was
0.014-inch and 0.016-inch, respectively. Each archwire was placed for 4 weeks. Outcome
measures included the amount of crowding using Little's irregularity index (LII), apical root
resorption, and pain perception. The effectiveness of alignment was tested using 2X2 mixed
factorial ANOVA, while root resorption and pain perception were tested by the Mann-Whitney U
test, and Wilcoxon signed-rank test (P<0.05).
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