The dentist to population ratio according to the Bhore Committee:
1 : 6,000
1 : 4,000
1 : 2,000
0.5625
The Government of India in 1943 appointed the Health Survey and Development Committee with Sir Joseph Bhore as Chairman. 
The Committee visualised the development of primary health centres in 2 stages: 

As a short-term measure, it was proposed that each primary health centre in the rural areas should cater to a population of 40,000 with a secondary health centre to serve as a supervisory, coordinating and referral institution. For each PHC, two medical officers, 4 public health nurses, one nurse, 4 midwives, 4 trained dais, 2 sanitary inspectors, 2 health assistants, one pharmacist, and 15 other class IV employees were recommended.
A long-term programme (also called the 3 million plan) of setting up primary health units with 75-bedded hospitals for each 10,000 to 20,000 population and secondary units with 650-bedded hospitals, again regionalized around district hospitals with 2,500 beds.
He also recommended 1:4000 dentist to population ratio according to the Bhore Committee.

Park textbook of preventive and social medicine
 23rd edition