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Figure 5. Low-power SEM view of the alveolar bony crypt of the rat 1st mandibular molar at day 14, showing the extensive bone growth that has occurred at the base, especially in the region of the interradicular septum (IR). Four pits represent where the 4 roots reside—mesial (M), distal (D), mesiolabial (L), and mesiobuccal (B). A prominent interdental septum (ID) is present that separates the crypt of the first molar from the 2nd molar (2M). Note that all the newly formed bone, such as seen in the IR or ID, is trabecular.
