Fig. 4. Low power, histological image of the retrieved specimens belonging to (A) Underprepared site: bone tissue and bone chips surrounding almost the whole implant surface could be observed; only in the portions where the spongy bone was present, and thin bone trabeculae in close proximity with the implant surface were evident; (B) Normal preparation: small bone trabeculae surrounding the implant surface could be seen; (C) Tapped site: small bone trabeculae and bone chips surrounding the implant surface could be seen. (under toluidine blue and acid fuchsin. Original magnification ×6).
