Your dentist can also place fluoride gel on the tooth to help with the sensitivity. You can continue to use the sensodyne toothpaste for sensitivity as well. Your dentist may also have various dentin desensitizers available to him. Some brands are D/Sense or MI Paste may work to help with sensitivity. He can also place bonding (white composite fillings). If that doesn't work, a root canal can be done but a crown MAY need to be placed also after a root canal.
Thankyou very much Jerome for your reply