Fig.8'': The most recent intra-op occlusal view shows that there is no space between LL4 and 6, whereas + space between LR 4 and 6 (*). In addition, LR 6 and 7 are lingually inclined (arrows).
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Xin Wei, DDS, PhD, MS 1st edition 11/03/2013, last revision 11/03/2013