Fixed Lingual Retainers Prevent Relapse of Lower Incisor Alignment

References 

1. Little RM. The irregularity index: a quantitative score of mandibular anterior alignment. Am J Orthod Dentofac Orthop. 1975;68(5):554–563
2. Littlewood SJ, Millet DT, Doubleday B, Bearn DR, Worthington HV. Orthodontic retention: a systematic review. J Orthod. 2006;33(3):205–212
3. Littlewood SJ, Millet DT, Doubleday B, Bearn DR, Worthington HV. Retention procedures for stabilising tooth position after treatment with orthodontic braces. Cochrane Database Syst Rev. 2006;1:CD002283;Republished online with edits January 2009. Issue;1: 2009
4. How Kau C. Orthodontic retention regimes: will we ever have the answer. Evid Based Dent. 2006;7(4):100
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