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1 Discomfort caused by the circumferential comfortable retainer (CCR) as a removable maxillary retainer
Jin-Hugh Choi, Cheol-Hyun Moon
Korean J Orthod.2010;40(5):325-333.   Published online 2010 October 31     DOI: http://dx.doi.org/10.4041/kjod.2010.40.5.325
      

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