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Continue to ChatComparing the effects of Essix and Hawley retainers on the acoustics of speech - https://avesis.hacettepe.edu.tr/yayin/d010d87e-f1d4-4a45-9fff-4a73b28d70f6/comparing-the-effects-of-essix-and-hawley-retainers-on-the-acoustics-of-speech