Haad-endodontics __top__ [EXCLUSIVE]

During root canal preparation of a mandibular first molar, you notice continuous bleeding from the pulp chamber floor after establishing the four main canals. What is the most appropriate next step? A) Obturate immediately B) Place calcium hydroxide and temporize C) Search for a second mesial canal (MM or middle mesial) D) Perform apical surgery

A patient returns 1 year after nonsurgical RCT of #11 with a persistent sinus tract. CBCT shows a radiolucency at the root tip and a missed palatal canal. What is the best treatment? A) Retreatment + locate palatal canal B) Apicoectomy only C) Extraction D) Antibiotics for 2 weeks haad-endodontics