Fig. 4
(a) A sample of group I (NeoMTA Plus®) after one month showing the area of furcation defect stuffed with coherent fibrous tissue and focal hard tissue formation (green arrow), normal interradicular bone (yellow arrow) and restored uppermost trabeculae (blue arrow). (b) A higher magnification of the same sample in Fig. 4a showing a remarkable deposition of calcific tissue around the blood vessel (red arrow) and along some collagen fibers (black arrow) with no inflammatory cells. (c) A sample of group II (MTA Angelus) after one month showing condensed fibrous tissue with variable thickness and completeness (green arrows), some lacelike basophilic calcifications (red arrow) and remnants of the repair material (yellow arrow) permeating within the normal trabeculae of interradicular bone (black arrow). (d) A higher magnification of the same sample in Fig. 4c showing thread-like calcifications (red arrows) surrounded by the material residues (yellow arrow) and few inflammatory cells (black circle) [H&E, X4 (a, c) and X40 (b, d)]