Apical Patency and Postoperative Pain.

Influence of Maintaining Apical Patency on Postoperative Pain in Posterior Teeth With Necrotic Pulp and Apical Periodontitis: A Randomized Controlled Trial.

The purpose of this study is to determine whether maintaining an apical patency causes postoperative pain in posterior teeth with necrotic pulp and apical periodontitis.

Apical patency (AP) is a procedure that prevents accumulation of soft and hard tissue debris within the cement canal. However, some RCTs indicate that maintaining an AP causes postoperative pain, whilst some RCTs pointed out there is no difference in terms of pain when AP has been performed. We, therefore, would like to conduct a RCT to increase the sample size of the previously performed RCTs to do an systematic review.

Inclusion Criteria:

• Mature permanent teeth having plural necrosis and apical periodontitis

Exclusion Criteria:

• Systemic disorders
• Diabetes
• Pregnancy
• Less than 18 years of age
• Immunocompromised
• Patients who had taken antibiotics in the past 1 month
• Patients who had a positive history of analgesic use within the past 3 days
• Previously accessed teeth