10.5mm offset is applied for #13, and as our shortest drill length is 7.3mm (Actual length would be 8.5mm) after removing the root, it's not going to touch anything. So I've put the first drill as 8.5mm length (actual length would be 9.7mm) as usual.  Even after removing root, you have to clean out the extraction socket so I don't think drill is going to change path at all. So regular drilling sequence is suggested. But if you still want to see the path, I will revise the drilling sequence, please let me know!

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Xin Wei, DDS, PhD, MS 1st edition 06/04/2019, last revision 06/04/2019