Fig.3 (magnified mirror image, preop): The gingiva of the buccal furca (between arrowheads, or between the mesiobuccal and distobuccal roots (MB, DB) appears to be healthy with the epithelium presumbably.

Fig.4 (magnified mirror image, immediately post extraction): Granulation tissue should be removed from the mesiobuccal and distobuccal sockets, but the gingiva over the septum (S) should remain undisturbed, since the latter is presumed to be healthy as mentioned above.  It will provide the epithelium to populate the buccal sockets after extraction.

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Xin Wei, DDS, PhD, MS 1st edition 12/29/2013, last revision 04/22/2018