A 45-year-old man requests extraction of #19 because of endodontist's diagnosis of root fracture (Fig.1).  In fact a surgical guide for #30 will be fabricated resting the distal aspect of the tilted tooth #31 after sectioning the mesial portion in the lab (Fig.1 red line).

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Xin Wei, DDS, PhD, MS 1st edition 06/08/2020, last revision 06/09/2020