Dental To prevent the fracture of an endodontic instrument the number of turns given inside the canal in a single motion should be: A Less than ¼ of a turn B ¼ to ½ turn C ½ of a turn D More than ¾ 💡 Explanation To prevent the fracture of an endodontic instrument the number of turns given inside the canal in a single motion should be: ✓ Correct Answer: B. ¼ to ½ turn