Comparison of speech changes caused by four different orthodontic retainers: a crossover randomized clinical trial
Diego Coelho LORENZONI,
José Fernando Castanha HENRIQUES,
Letícia Korb da SILVA
et al.
Abstract:Objective: This study aimed to compare the influence of four different maxillary removable orthodontic retainers on speech. Material and Methods: Eligibility criteria for sample selection were: 20-40-year subjects with acceptable occlusion, native speakers of Portuguese. The volunteers (n=21) were divided in four groups randomized with a 1:1:1:1 allocation ratio. The four groups used, in random order, the four types of retainers full-time for 21 days each, with a washout period of 7-days. The removable maxill… Show more
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