Recurrent caries can cause sensitivity to cold.Examination and xray to reach diagnosis Rx:- •RA Thermoseal toothpaste apply for 15 minutes and brush with soft brush from gums towards the teeth for 15 days .Thermoseal repair for a month •Senquel AD mouthwash twice daily for 14 days

If food lodgement is there clean food with proxa brush or floss .

As there was food lodgement.you must have developed new cavity . Check up with xray needed for further treatment.

Hi . Good evening. As you mentioned the RCT was done 5 years back and you didn’t have any issue till of late, it’s my opinion that there should not be any issue with the RCT or the crown. The gums surrounding the next live tooth may have receded down exposing the fresh root surface which may be causing the sensitivity. However as nothing much can be done during the lockdown period, it would be advisable to use a desensitisation tooth paste like sensodyne tooth paste and avoid cold and too hot beverages and food till you find any dentist for help.

Hi You will have to get a visual check up done to get checked for the adjacent teeth, as root canal treated cannot be sensitive. Probably the adjacent teeth may be affected

Keep the area between the tooth and cap clean by using floss or interdental brush. You can use desensitizing mouthwash like Senquel AD.

More through examination required about the Rct treated tooth. But for mean while you can use tropical application of desensitizeing gels.

Ur sensitive is because of the gap in between the crown and the tooth so presently u can use vantage tooth paste and along with this use cholhex ads mouth wash 1:3 dilutions means 1 cap in 1 glass of water and use the whole glass of this to rinse nicely