Evaluation Of Postoperative Pain Intensity After Single-versus Two-visit Root Canal Treatment In Chronic Periapical Periodontitis

Objective: The purpose of this paper is to evaluate the short-term pain response of patients with chronic periapical periodontitis of single root canal of anterior teeth and premolars,and to evaluates the influence of several factors,such as gender,age,tooth position and preoperative VAS pain value on the pain intensity after root canal treatment,so as to provide a certain basis for clinicians to make clinical diagnosis and treatment procedure decisions in similar cases.Methods: 62 patients were recruited from the patients who need root canal treatment in endodontics department of Union Hospital Affiliated to Fujian Medical University from June 2020 to January 2021.According to the selected treatment times,they were randomly divided into two groups: A group: single-visit root canal treatment group and B group:two-visit root canal treatment group.After root canal filling,take X-ray to confirm that root canal filling is perfect.At the same time,the patient’s age,sex,tooth position,VAS evaluation of pain before and after treatment at 12 h,24 h,48 h and 72 h,and the use of analgesics after treatment were recorded,and the related factors were grouped to evaluate the pain difference between the two groups.SPSS 25.0 software was used to analyze the general data,postoperative pain and five factors of the two groups after root canal filling.Results: 1.The average VAS pain score in the single-visit treatment group was smaller than that in the two-visit treatment group at 12 h,24 h,48 h and 72 h after root canal treatment,but the difference was not statistically significant(p >0.05).2.The pain intensity of patients in both groups decreased with time,and the pain intensity was the highest at 12 h after root canal treatment,and pain disappeared in all patients 7 days after operation 3.The VAS scores of the younger patients(aged 18-40 years)at 48 h and 72 h after single-visit root canal therapy were lower than those of the two-visit treatment group,with statistical difference(p <0.05).There was no statistical difference in postoperative pain between the two groups at 12 h and 24 h after operation(p>0.05).There was no significant difference in VAS pain between men,elderly group(41-65 years old),maxillary teeth,maxillary teeth,anterior teeth and premolars at different time intervals after operation(p >0.05).4.The VAS pain value before operation has statistical difference on the VAS pain value at 12 h and 24 h after single-visit root canal therapy(p <0.05),while it has statistical difference on the VAS pain value at 12 h,24 h and 48 h after twovisit root canal therapy(p <0.05),but there is no statistical difference on the pain score at72 h after operation(p<0.05).Gender,age,tooth position(upper and lower jaw,front and back teeth)had no correlation with VAS pain score at different time points after operation(p>0.05).Conclusion: The pain value of single-visit root canal treatment is lower than that of twovisit root canal treatment,but there is no significant difference;The pain in the younger age group(18-40 years old)after 48 h and 72 h after single-visit root canal treatment was less than that in the two-visit root canal treatment group.Patients with high preoperative pain are more painful than patients with low preoperative pain within 24 hours after single-visit or two-visit root canal treatment.It is recommended that patients under 40 years old with mild preoperative pain can choose single-visit root canal treatment for chronic periapical periodontitis of anterior teeth or premolars.