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Comparison of Different Methods for Pain Reduction During Dental Anesthesia Injection: Benzocaine Gel vs. Cold Spray

Comparison of the effect of topical Benzocaine 20% gel and cold spray on pain during insertion and injection of 2% lidocaine local anesthetic solution for anterior maxillary teeth infiltration technique, randomized double-blinded clinical trial

Status
Active, not recruiting
Phases
Unknown
Study type
Interventional
Source
IRCT
Registry ID
IRCT20250206064669N1
Enrollment
32
Registered
2025-03-23
Start date
2025-03-08
Completion date
Unknown
Last updated
2025-07-21

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

Conditions

the effect of topical Benzocaine ??% gel and cold spray on pain during insertion and injection of ?% lidocaine local anesthetic solution for anterior maxillary teeth infiltration technique.

Interventions

Intervention 1: first Intervention group: In the first treatment session, the assistant dries the vestibular depth at the injection site. Then, the tip of a cotton swab is sufficiently coated (pea-siz

Sponsors

Tehran University of Medical Sciences
Lead Sponsor

Eligibility

Sex/Gender
All
Age
18 Years to 65 Years

Inclusion criteria

Inclusion criteria: Patients must be between 18 and 65 years old and classified as ASA I or ASA II according to the American Society of Anesthesiologists (ASA) guidelines. The maxillary anterior teeth (from canine on one side to canine on the opposite side) must require root canal treatment without spontaneous pain, prolonged or severe pain in response to stimuli, and must not exhibit tenderness to percussion, palpation sensitivity, abscess, or sinus tract in the surrounding mucosa.This means that the pulpal status should be either asymptomatic irreversible pulpitis or necrosis, and the periapical status should be normal or asymptomatic apical periodontitis. Patients must be able to read the prepared consent form and have the mental capacity to sign it.

Exclusion criteria

Exclusion criteria: Patients with systemic diseases classified as ASA 3 or higher are excluded. The patient has reported any history of sensitivity or allergy to the materials used in the study. If any drug interactions between the medications used by the patient and the materials used in the has been reported. Pregnant and breastfeeding women are excluded from the study. The maxillary anterior tooth with a pulpal status of symptomatic irreversible pulpitis and a periapical status of symptomatic apical periodontitis, acute or chronic periapical abscess is excluded. The patient has taken analgesics, antidepressants, anxiolytics, or any sulfonamide drugs (due to potential interactions with benzocaine and the risk of methemoglobinemia) within 12 hours before presenting for treatment. A tooth that has previously undergone root canal treatment. This study cannot be conducted on individuals who lack the capacity to make decisions.

Design outcomes

Primary

MeasureTime frame
Pain intensity using the Visual Analog Scale (VAS). Timepoint: First and second session (at least 6 days after the first session) of endodontic treatment immediately after the necessary anesthesia injection. Method of measurement: Visual Analogue Scale.

Countries

Iran (Islamic Republic of)

Contacts

Public ContactParsa Ghorbani

Tehran University of Medical Sciences

parsagh1380@gmail.com+98 21 6612 2339

Outcome results

None listed

Source: IRCT (via WHO ICTRP) · Data processed: Feb 4, 2026