In the preop x-ray it didn't really look like a microperforation and after entering the tooth I was quite sure that it hasn't been one. Instead of microns there had been some mm to close. After irrigation and cleaning the perforations margins with US I placed collagen as a barrier. After that I build my MTA-Dome which was covered by a low flowable composite, followed by Tetric Flow. After that I was able to
locate and negotiate the 3 missed canals. MB1 and MB2 had a quite deep
bifurcation. Contd.........
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