Venkat, my dad was on primarily on Bicarb/Salt gargles and occasionally on Iodine gargles as due to lack of saliva, you may have occassional bouts of thrush (since the surgery and rt he was never able to use tongue cleaner). You can also try Biotene, if you can find it in India, probably ebay may help.

Doctor had prescribed Senquel-F toothpaste and adviced my dad to brush atleast twice a day.

All the best and hope to see you online more frequently now.