Thumb rule to visit the dentist is once in 6 months unless advised otherwise for a specific dental or medical condition.

Teeth tend to stain over time due to food colouring, caffeinated  drinks, smoking and accumulation of plaque.

Superficial stains and yellowish plaque can be removed by a routine oral prophylaxis, deeper discolorations require whitening using an office bleaching system like Zoom whitening (Phillips) or an at home bleaching kit for milder stains.

Root canal treated are often grossly decayed and do not have sufficient tooth structure remaining, in such instances it is important to crown them to be able to protect them, however in case where the amount of tooth structure loss is minimal or a root canal has been performed intentionally, a smalltooth coloured composite filling or inlay may also suffice.

The best way of preventing teeth from moving, is to go for regular cleanups, this helps maintain bone and gum health and thereby prevent unwanted tooth migration.

Wisdom teeth which are erupting at wrong angulations, causing food impaction, cheek bites or those which are inflamed and infected, need to be removed.

No, all implant procedures are carried out under local anaesthesia which numbs the area being worked on,  post operatively there maybe some tenderness especially in extraction sockets (due to the extraction and not the implant) but these are controlled easily with anti- inflammatory drugs.

Dentistry in India isn't covered under most insurance plans, worldwide there are some corporate and private plans which cover some aspects of treatment, usually emergency treatment for pain/swelling/trauma in relation to teeth.