Dental The prognosis of the broken instrument in root canal is good when A Instrument is less than 20 nos. B Instrument is lodged in the bone beyond the apical area C Instrument obliterates apical third of the canal D Instrument is in middle 💡 Explanation The prognosis of the broken instrument in root canal is good when ✓ Correct Answer: C. Instrument obliterates apical third of the canal