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Randomized Controlled Trial
. 2021 Jul 1;91(4):441-448.
doi: 10.2319/110620-916.1.

Comprehensive comparison of canine retraction using NiTi closed coil springs vs elastomeric chains

Haya A Barsoum, Hend S ElSayed, Fouad A El Sharaby, Juan Martin Palomo, Yehya A Mostafa
Randomized Controlled Trial

Comprehensive comparison of canine retraction using NiTi closed coil springs vs elastomeric chains

Haya A Barsoum et al. Angle Orthod. .

Abstract

Objectives: To compare canine retraction using NiTi closed coil springs vs elastomeric chains comprehensively in a split-mouth randomized controlled trial.

Materials and methods: The canines in 64 quadrants were randomly retracted into the first premolar extraction spaces using NiTi closed coil springs or elastomeric chains, in the maxilla and mandible. The retraction force was 150 g. Cone beam computed tomography scans and study models were obtained before the start of canine retraction and 6 months later. The rate and total amount of canine retraction, canine rotation, tipping, and root resorption were evaluated. A visual analogue scale was used to evaluate patients' pain experience.

Results: The two methods were statistically similar for dental changes, rate of canine retraction, and root resorption. However, patients reported significantly more days of pain with the elastomeric chain compared to the NiTi closed coil springs.

Conclusions: Within the constraints of the current study, using either NiTi closed coil springs or elastomeric chains as force delivery systems for canine retraction results in no significant difference in the rate of canine retraction, tipping, rotation, or root resorption. Pain experience during retraction using elastomeric chains is more significant yet needs further investigation.

Keywords: Canine retraction; Coil springs; Elastomeric chains; Pain; Root resorption.

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Figures

Figure 1.
Figure 1.
NiTi closed coil spring attached to the vertical power arm and the TAD.
Figure 2.
Figure 2.
Retraction of a maxillary canine using an elastomeric chain.
Figure 3.
Figure 3.
The canine and molar measurements and the orientation of the digital models for superimposition using the reference planes.
Figure 4.
Figure 4.
CBCT image orientation on the reference planes.
Figure 5.
Figure 5.
CONSORT flow chart of patients throughout the trial.
See this image and copyright information in PMC

Comment in

  • Response to the Letter.
    Barsoum HA, ElSayed HS, El Sharaby FA, Palomo JM, Mostafa YA. Barsoum HA, et al. Angle Orthod. 2022 May 1;92(3):427. doi: 10.2319/1945-7103-92.3.427. Angle Orthod. 2022. PMID: 35421895 Free PMC article. No abstract available.
  • Letter to the Editor.
    Kumar SS, Ramteke S, Madhan B. Kumar SS, et al. Angle Orthod. 2022 May 1;92(3):426. doi: 10.2319/1945-7103-92.3.426. Angle Orthod. 2022. PMID: 35421896 Free PMC article. No abstract available.

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