He said the tumour was roughly 5cm by 3cm, and took five hours for surgeons to remove the teeth.
Doctors said it took mere moments to get permission to operate from his parents - but their son Ravindran required several hours of cajoling before giving in. The unusual surgery was performed at Saveetha Dental College and Hospital in Chennai, India.
But a similar case in 2014, when a 17-year-old had 232 denticles removed, blamed it on compound composite odontoma.
According to the doctors, this is the maximum number of teeth extracted from a patient and the hospital has applied for a place the Guinness and Limca Book of Records.
'We opened up the jaw after administering general anaesthesia and saw a sack inside it, ' said Dr Senthilnathan, who led the operation.
The hospital said it was "the first ever case to be documented world wide where so many minute teeth were found in a single individual".
The tooth sizes varied from 1 to 15 millimeters and each resembled a tooth with crown covered by enamel and a root like structure.
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"We have never seen these many teeth in any one site", Ramani said.
Surgeons told Indianexpress.com that the surgery did not require any jaw reconstruction.
It's unclear what caused this to happen, but dentists believe it could be due to genetic or environmental factors, according to the Times of India. The sac was removed.
At that point, doctors determined surgery was necessary to treat the rare condition.
"Earlier, things like not as many dentists, lack of education, poverty meant that there was not as much awareness".
The boy, named Ravindranath, was released three days after the surgery and is expected to make a full recovery - with a healthy count of 21 teeth.
Awareness about dental and oral health was improving, he said, though access in rural areas remained problematic.