The dentist has advised you correctly, the tooth which you have shown had furcation involved. Such cases have very bad prognosis. Its advisable to extract the tooth.

The furcal involvement and peri apical lesion shows bad prognosis even after the root canal, it's better to go for extraction.

Hello there…. See the condition of your tooth is very poor… The only option left is to get it extracted. So first thing is to get it extracted and as this is one of the tooth that needs replacement. So the best option will be to get an implant done there. You can consult me for further details on this treatment process thoroughly and why it need replacement with an implant.

Tiny spot is peri apical infection And tooth is grossly carious and infection is also seen in furcation area Get the tooth extracted ASAP and followed by prosthesis

Tiny black spot below tooth indicates periapical abscess.tooth is grossly decayed. Get it removed at the earliest. You can consult through this for prescription of medication.

Doctor advised u for extraction bcz not only the periapical infection (the black spot u mentioned)but also the decay reached till furcation even a attempt for root canal may fracture the tooth cause bleeding and swelling so best option is go for EXTRACTION. Followed by immediate implant .

Hi ..tooth is badly affected by decay..  it needs removal asap to avoid infection