The degree of the lingual concavities is usually similar for a particular patient, but it is not the case for this 60-year-old Chinese lady (Fig.11,12).  The lingual concavity is shallower on the right (Fig.11) than that on the left (Fig.12).

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Xin Wei, DDS, PhD, MS 1st edition 04/14/2013, last revision 04/15/2014