Clinical and Biochemical Effects Of Cryotherapy Protocols On Mandibular Premolars With Symptomatic Apical Periodontitis

Pain is the major reason for patients' visits to dental clinics.Medications have side effects. Treatments including cryotherapy have been suggested to prevent these side effects.This study will compare the effect of oral and intraradicular cryotherapy on the level of substance p ,post operative pain and analgesic intake in mandibular premolars with symptomatic apical periodontitis. Thirty patients with symptomatic apical periodontitis will be randomly distributed into three groups: oral,intraradicular cryotherapy and control group (n = 10). In the oral cryotherapy group application of (a cold pack of ice gel enveloped by a sealed plastic cover) will be performed for 30 minutes following the completion of canal preparation.Getting glide path by inserting K-file #10. coronal flaring will be done .The first apical fluid samples for all groups will be obtained at this step. Intra-radicular cryotherapy will be performed where normal root canal treatment will be done. Then a final flush will be done with 20 mL of cold saline 2.5°C for 10 minutes. For the control group,no application of cryotherapy will be done.Second samples will be taken after mechanical preparation for intraradicular and control ,and after 30minutes of cold application for the cryotherapy group.Levels of substance p will be measured using the ELISA test.The patients will be asked to fill out the VAS questionnaire at 6, 24, 48 and 72 h.and analgesic intake

NCT Number	NCT07138365
Lead Sponsor	Ain Shams University
Conditions	Post Operative Pain, Inflammation
Enrollment	180 participants
Start Date	2024-06-01
Primary Completion	2025-06-01 (estimated)
Study Completion	2025-06-01 (estimated)
Updated on ClinicalTrials.gov	2026-02-11