Treating a Molar with a Deep Furcation Defect

Should a tooth with a deep pocket into a furcation defect be treated or extracted?
Patient: 70 year old male patient with controlled hypertension

Chief Complaint: Asymptomatic (referred due to a deep periodontal pocket which was discovered by the referring dentist)

Dental History: The patient reported the root canal treatment having been performed by an endodontist over a decade prior to the initial examination by the author. A crown and core build-up had been performed by the patient’s referring dentist during the same period immediately after the endodontic treatment. A deep periodontal pocket extending into the furcation had been noted by the hygienist during the patient’s last cleaning visit.