Hopefully you won't need brain surgery
anytime soon, but if you know someone who does, it would be a good idea for him or her to go to the dentist beforehand to prevent issues like pneumonia
After a major operation (especially brain surgery), the elderly generation runs a 20% risk of getting pneumonia. This is because brain surgery weaknes the gag and coughing reflexes, thus making it easier for patients to breath in bacteria from their mouth and nose.
A research study done among 23 people has found that proper oral hygiene before a surgery makes a difference. There were five people who developed pneumonia within 48 hours of their operation, and each of them had poor oral health, like gingivitis
, prior to the surgery. It is estimated that the risk of infection after surgery in those with poor oral health is increased by at least threefold.
Source: New Scientist