Mrs. Zhu is afraid of dental work.  One of her bottom right molar teeth (#31) has been missing for long time.  Witnessing the beauty of guided implant surgery of her husband, she agrees to have the same one.  The latter requires 2 preparations: CT and impression.  CT (Fig.4,5) helps choosing a proper-sized implant (I, green), relative to the underneath nerve (N).

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Xin Wei, DDS, PhD, MS 1st edition 08/13/2018, last revision 08/13/2018