Mashallah Khanemasjedi1, Mehrnaz Moradinejad1, Pedram Javidi2, Ozra Niknam1, Nima Haghighat Jahromi1, Vahid Rakhshan3. 1. Department of Orthodontics, Faculty of Dentistry, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran. 2. Iranian Tissue Engineering and Graft Research Center, Tehran University of Medical Sciences, Tehran, Iran. Electronic address: pjavidi@gmail.com. 3. Iranian Tissue Engineering and Graft Research Center, Tehran University of Medical Sciences, Tehran, Iran; Department of Dental Anatomy and Morphology, Dental Branch, Islamic Azad University, Tehran, Iran.
Abstract
OBJECTIVE: The use of newly-introduced elastic memory chains (EMCs) in space closure is increasingly gaining popularity. However, no clinical studies have evaluated their efficacy. Therefore, this study was conducted. METHODS: In this two-center split-mouth single-blind randomized controlled trial, 21 jaws were divided into 42 quadrants. The two treatments [canine retraction using EMCs versus nickel-titanium (NiTi) coil springs (as control)] were randomly assigned to two quadrants of each jaw. The premolar space was measured at the baseline, and in the 1st, 2nd, and 3rd months of canine retraction, by a blinded orthodontist. Space closure rates were compared using a paired t-test. RESULTS: The rates of space closure using NiTi springs were 1.93±0.62, 1.71±0.75, and 1.36±0.51mm/month, during the 1st, 2nd, and 3rd months of treatment, respectively. The 3-month average rates of space closure were 1.67±0.39 and 1.89±0.36mm/month in the NiTi and elastic groups, respectively (faster in the elastic group, P=0.022). CONCLUSIONS: The application of elastic memory chains is as effective as NiTi springs.
OBJECTIVE: The use of newly-introduced elastic memory chains (EMCs) in space closure is increasingly gaining popularity. However, no clinical studies have evaluated their efficacy. Therefore, this study was conducted. METHODS: In this two-center split-mouth single-blind randomized controlled trial, 21 jaws were divided into 42 quadrants. The two treatments [canine retraction using EMCs versus nickel-titanium (NiTi) coil springs (as control)] were randomly assigned to two quadrants of each jaw. The premolar space was measured at the baseline, and in the 1st, 2nd, and 3rd months of canine retraction, by a blinded orthodontist. Space closure rates were compared using a paired t-test. RESULTS: The rates of space closure using NiTi springs were 1.93±0.62, 1.71±0.75, and 1.36±0.51mm/month, during the 1st, 2nd, and 3rd months of treatment, respectively. The 3-month average rates of space closure were 1.67±0.39 and 1.89±0.36mm/month in the NiTi and elastic groups, respectively (faster in the elastic group, P=0.022). CONCLUSIONS: The application of elastic memory chains is as effective as NiTi springs.
Authors: Serene A Badran; Juman M Al-Zaben; Lina M Al-Taie; Haya Tbeishi; Mahmoud K Al-Omiri Journal: Angle Orthod Date: 2022-07-01 Impact factor: 2.684
Authors: Haya A Barsoum; Hend S ElSayed; Fouad A El Sharaby; Juan Martin Palomo; Yehya A Mostafa Journal: Angle Orthod Date: 2021-07-01 Impact factor: 2.079