A randomized clinical trial to compare three methods of orthodontic space closure

Journal of Orthodontics
V DixonN A Mandall

Abstract

To compare the rates of orthodontic space closure for: Active ligatures, polyurethane powerchain (Rocky Mountain Orthodontics, RMO Europe, Parc d'Innovation, Rue Geiler de Kaysersberg, 67400 Illkirch-Graffenstaden, Strasbourg, France) and nickel titanium springs. Patients entering the space closure phase of fixed orthodontic treatment attending six orthodontic providers. Twelve patients received active ligatures (48 quadrants), 10 patients received powerchain (40 quadrants) and 11 patients, nickel-titanium springs (44 quadrants). Patients were randomly allocated for treatment with active ligatures, powerchain or nickel titanium springs. Upper and lower study models were collected at the start of space closure (T(o)) and 4 months later (T(1)). We recorded whether the patient wore Class II or Class III elastics. Space present in all four quadrants was measured, by a calibrated examiner, using Vernier callipers at T(o) and T(1.) The rate of space closure, in millimetres per month (4 weeks) and a 4-monthly rate, was then calculated. Examiner reliability was assessed at least 2 weeks later. Mean rates of space closure were 0.35 mm/month for active ligatures, 0.58 mm/month for powerchain, and 0.81 mm/month for NiTi springs. No statis...Continue Reading

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Jan 12, 2021·Dr. Kumeran Mohan, Dr. Kumeran Mohan

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Citations

Oct 27, 2009·The Angle Orthodontist·Anthony Louis MaganziniMairaj K Ahmed
Jan 7, 2011·The Angle Orthodontist·Maurício MezomoSusiane Allgayer
Dec 3, 2014·Journal of International Society of Preventive & Community Dentistry·Ravi Krishna KanuruP Firoz Babu
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