Ловля рыбок в мутной перфорации

Errors in endodontic treatment. They are allowed by everyone and are different. Over time, they become less in practice (the main thing is not more), and sometimes what you considered a success before, you begin to consider a failure. For this reason, the philosophy of professional error is a tactical concept. In this case, perforation when searching for MB2, which is a fairly common variant of furcation perforation. I still understand how such a perforation can be instrumentate like a canal (working length??). But fundamentally I don’t understand how it can be obturated!? It can’t be dried! It’s bleeding. The tooth was treated endodontically. Chronic periapical abscess with sinus tract. (periradicular, furcations) CBCT no. The RG - little less than nothing, everything is superimposed with any angulation. At this moment, the sinus tract has closed. I am watching whether or not there will be a recession to the level of perforation, since crystal perforations are dangerous. Let’s see.