A total of 60 patients presenting with single-rooted teeth exhibiting symptomatic apical periodontitis were subjected to a randomized allocation into two groups of 30 each. Irrigation was done using 3% sodium hypochlorite for 5 seconds in all 60 teeth. Group 1 underwent final irrigation utilizing normal saline at room temperature. Group 2 received final irrigation using normal saline refrigerated between 2-5°C. Pain levels were assessed and recorded before the procedure and at 24 and 48-hour time intervals.

Objective:

To compare the reduction in post operative pain of treatment group with control group using normal; saline at room temperature at 24 and 48 hours

Methodology:

A total of 60 patients presenting with single-rooted teeth exhibiting symptomatic apical periodontitis were subjected to a randomized allocation into two groups of 30 each. Irrigation was done using 3% sodium hypochlorite for 5 seconds in all 60 teeth. Group 1 underwent final irrigation utilizing normal saline at room temperature. Group 2 received final irrigation using normal saline refrigerated between 2-5°C. Pain levels were assessed and recorded before the procedure and at 24 and 48-hour time intervals.

Statistical analysis:

Statistical packages for the Social Sciences (SPSS) Version 22 will be used for data analysis. Mean and SD and Frequencies will be used for quantitative variables (Age and pain), and frequency and percentage for qualitative variable (gender). The continuous variable pain score will be compared among control and cryotherapy group by using independent sample t test. Effect modifiers ( age and gender) will be stratified by using post stratified independent sample t test .The P value < 0.05 will be considered as the threshold for statistical significance, at a confidence interval of 95%.

Inclusion Criteria:

Individual (male/female) with age >18 years with symptomatic apical periodontitis in permanent teeth

Exclusion Criteria:

1. Teeth with calcified canals or aberrant root anatomy,
2. Female Pregnant patients
3. Patients using medications such as analgesics or anti-biotics drugs and
4. Those who refuse to participate in the study