According to studies (clinical, anatomical) MB2 in upper first molars is present almost always, yet many times it is not easy to find. Rule of thumb is saying to search somewhere mesial to line conecting MB1 and P canal. Here diamond bur, Munce bur, ultrasonic tip, R-pilot, Reciproc25 and Mtwo 25 were used to scound and shape canal.

Next in video you can see clinical xrays during whole procedure and adhesive postendodontic build up with dualcure composite (no post this time)

For tip for post preparation and mixing of dual cure composite

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