Skip to content

Effect of Two Different Cryotherapy Irrigation Protocols on Postoperative Endodontic Pain

Effect of Two Intracanal Cryotherapy Irrigation Protocols on Postoperative Endodontic Pain in Patients With Symptomatic Irreversible Pulpitis and Apical Periodontitis in Mandibular Molars: A Randomized Clinical Trial.

Status
Not yet recruiting
Phases
Unknown
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT07676409
Acronym
NAOCL/EDTA
Enrollment
45
Registered
2026-06-30
Start date
2026-06-15
Completion date
2027-07-15
Last updated
2026-06-30

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Cryotherapy

Keywords

Cryotherapy, Postoperative endodontic pain, irrigation

Brief summary

The aim of this study is to evaluate the effect of intracanal cryotreated (2-3°C) 2.5% sodium hypochlorite and Saline used throughout the procedure, compared with a room-temperature irrigation protocol with a final cryotreated saline flush or an entirely room temperature irrigation protocol, on postoperative pain in patients with symptomatic irreversible pulpitis and symptomatic apical periodontitis in mandibular molars.

Interventions

PROCEDUREFull Cryotherapy Irrigation (FC)

Full intracanal irrigation performed using 2.5% cold sodium hypochlorite solution (2-3°C) throughout the treatment procedure, followed by cold saline (2-3°C), EDTA, and a final rinse with cold saline

PROCEDUREFinal Flush Cryotherapy Irrigation (FFC)

Full intracanal irrigation performed using 2.5% sodium hypochlorite solution at room temperature throughout the treatment procedure, followed by saline and EDTA at room temperature, and a final rinse with cryotreated saline (2-3°C).

PROCEDUREConventional Irrigation (CI)

Full intracanal irrigation performed at room-temperature using 2.5% sodium hypochlorite solution, followed by saline, EDTA, and a final rinse with saline.

Sponsors

Cairo University
Lead SponsorOTHER

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
OTHER
Masking
SINGLE (Outcomes Assessor)

Eligibility

Sex/Gender
ALL
Age
20 Years to 40 Years
Healthy volunteers
No

Inclusion criteria

1. Age between 20-40 years old. 2. Systemically healthy patients (ASA I or II). 3. Mature Mandibular molar teeth with : * Preoperative sharp pain and symptomatic apical periodontitis marked on NRS scale by reading not less than 6. * Absence or slight widening in the periodontal ligament (PDL). * Vital response of pulp tissue to cold pulp tester and (ethyl chloride spray). * Positive response to percussion test. 4. Restorable teeth. 5. Ability to complete the endodontic treatment in a single visit. 6. Positive patient acceptance for participation in the trial. -----------------------------------------------------------------

Exclusion criteria

1. Medically compromised patients (ASA III or IV) 2. Patients who used NSAIDs in the 24 hours before treatment. 3. Patients with two or more adjacent teeth requiring endodontic treatment. 4. Pregnant women. 5. Patients reporting bruxism or clenching. 6. Teeth associated with : * Acute periapical abscess and/or swelling. * Greater than grade I mobility or pocket depth greater than 5mm. * Non-restorable teeth. * Immature Apex. 7. Radiographic evidence of external or internal root resorption, vertical root fracture, perforation, calcification.

Design outcomes

Primary

MeasureTime frameDescription
Incidence and severity of postoperative painFrom enrollment to the end of treatment at 3 daysUsing an 11-point Numeric Rating Scale (NRS) where the endpoints are the extremes of no pain and worst pain. Pain intensity was assigned into one of four pain categories: none (0); Mild (1-3); Moderate (4-6) and severe (7-10). Postoperative pain levels will be documented by the patients at 6, 12, 24, 48 and 72 hours postoperatively

Secondary

MeasureTime frameDescription
Incidence and Number of analgesic intakeFrom enrollment to the end of treatment at 3 daysIn case of severe or persistent postoperative pain, the operator will permit the patient to take Ibuprofen (200 mg) not more than 6 hours apart. Patients will be instructed to record their analgesic consumption by counting the number of tablets taken in the course of 72 hours postoperatively.

Contacts

CONTACTAhmed Mahmoud Mohamed, M.S.C
ahmed-abdelrasol@dentistry.cu.edu.eg+201032504202

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Jul 1, 2026