Your dentist can strengthen teeth better than any home remedy. Ask about an "oxalate" root rub, which stops or greatly reduces sensitivity by coating the root [source: Save Your Smile]. If your gum lines have permanently receded, your dentist can seal and protect your roots with bonding agents. Unfortunately, gums recede sometimes from dental procedures, such as crown placement or cleanings, and heal only with time, typically four to six weeks [source: WebMD].
New procedures help sensitivity, too. Those who grind their teeth at night can ask about a mouth guard to wear over their teeth. The guard keeps you from grinding away your enamel in your sleep. If sensitivity occurs in a tooth with an old silver filling, your dentist can redo the filling. Silver transmits hot and cold, so replacing a big silver filling with new material can eliminate pain. If your tooth cracked, ask for a non-silver filling immediately to plug root exposure.
Finally, see your dentist biannually for cleanings. She can catch causes of sensitivity, such as plaque build-up, before they worsen.
For more about dental hygiene, see the links on the next page.