Abstract
To evaluate the predictability of (SARDAC) technique regarding torque control and
vertical movement during en-masse retraction in lingual orthodontics.
Different setups of the SARDAC technique were tested during en-masse retraction in
lingual orthodontics. Simulated retraction was performed using the Orthodontic Measurement
and Simulation System (OMSS). Lever arms were welded between the lateral incisor and
canine brackets bilaterally on a 0.017“X0.025” inch maxillary lingual stainless- steel
wire. Bilateral, nickel titanium coil springs were used to apply a retraction force
of 1.5 N per side on para-median mini-screws, inter radicular mini-screws and to the
first molar brackets
Regarding the torque, the group where the force was applied between the 15 mm lever-arm
and the first molar bracket, was the only group that showed statistically significant
difference (palatal root torque) during en-masse retraction compared to the control
group. Regarding the vertical movement, no statistically significant difference was
found between any mechanical setup and the control group.
SARDAC technique is predictable and efficient in controlling torque and vertical movement
during en-masse retraction in lingual orthodontics.
Abbreviations:
SARDAC (Skeletal Anchorage, Right direction of the forces, Absolute control of the tooth movement), OMSS (Orthodontic measurement and simulation system), TADS (Temporary anchorage devices), CR (Center of resistance), NiTi (Nickel Titanium)To read this article in full you will need to make a payment
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Article info
Publication history
Published online: January 29, 2023
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