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The female woman is afraid of pain. After placement of 4x9 mm FC implant at #19, infiltration anesthesia is not enough osteotomy at #18. Block anesthesia is added. When a 5x9 mm FC implant is placed in the osteotomy (designed for 5x8.5 mm IS one), it is close to the Inferior Alveolar Canal (Fig.1 red dashed line; Fig.2). The third contributing factor is the pressure upon the distal end of the distal end guide while osteotomy. *: bone graft with PRF.
Xin Wei, DDS, PhD, MS 1st edition 07/30/2019, last revision 07/30/2019