CompletedNot Applicable

Single Gene Polymorphism and the Success Rate of Inferior Alveolar Nerve Block

India320 participantsStarted 2025-05-10

Plain-language summary

The inferior alveolar nerve block (IANB) is one of the most commonly used techniques in dentistry to achieve mandibular anesthesia during endodontic treatment. Despite its widespread use, the success rate of IANB is highly variable, with failure rates reported to range from 30% to 80% in patients with irreversible pulpitis. While several anatomical and clinical factors have been implicated, genetic variations in pain signaling pathways have been increasingly recognized as potential contributors to anesthetic failure. The SCN9A gene, which encodes the voltage-gated sodium channel Nav1.7, plays a critical role in nociception and pain modulation. The single nucleotide polymorphism (SNP) rs6746030 (G\>A) in SCN9A has been shown to alter channel function and has been associated with variable pain sensitivity and response to analgesia. This study aims to investigate the association between the SCN9A rs6746030 polymorphism and the success rate of IANB in patients undergoing root canal treatment. A total of 200 patients diagnosed with irreversible pulpitis in mandibular molars will be recruited. Based on anesthetic outcome, they will be divided into two groups: 100 patients with successful IANB and 100 patients with documented anesthetic failure. Buccal swab samples will be collected from each participant, and DNA will be extracted and genotyped using a TaqMan SNP assay. The frequency of SCN9A genotypes (GG, GA, AA) will be compared between the two groups to determine whether there is a statistically significant association with anesthetic outcome. The findings of this study will help identify genetic predictors of anesthetic failure and may provide a foundation for personalized anesthetic strategies in endodontic practice.

Who can participate

Age range

18 Years – 60 Years

Sex

ALL

See this in plain English?

AI-rewrites the medical criteria so a patient or caregiver can understand them. Always confirm with the trial site.

Inclusion Criteria: * Age 18-50 years. * Requiring root canal treatment in mandibular first or second molars diagnosed with irreversible pulpitis. * Administration of standard IANB with 2% lidocaine containing 1:80,000 epinephrine. * Ability to provide informed consent. Exclusion Criteria: * Systemic conditions affecting pain perception (e.g., diabetes, neuropathies). * Known allergy to local anesthetics. * Use of analgesics or anti-inflammatory medications within 24 hours before the procedure. * Pregnant or lactating women. * Patients with extensive periapical pathology or swelling. * Inability to comply with study requirements.

Questions worth asking your doctor

Bring these to your next appointment. They're a starting point for a shared conversation — not a sign you qualify or a recommendation to enrol.

1Based on my diagnosis and history, is this trial worth exploring for me — or is there a standard treatment we should try first?
2What does this trial's phase tell us about how much is already known about its safety and benefit?
3What would taking part actually involve for me — visits, tests, time, and travel?
4What are the known and possible risks or side effects I should weigh, and how would they be monitored?
5If this trial isn't the right fit, what other options or trials would you suggest I look into?

Generated to help you prepare — always confirm anything about your own eligibility and care with the study team and your doctor.

Questions for the trial coordinator

The trial coordinator is the person who runs the study day to day. These cover the practical side — logistics, costs, and what taking part would actually mean for your life. The study team confirms whether you meet the criteria; these are questions to ask, not a sign you qualify.

1What does taking part actually involve week to week — how many visits, where, and how long does each one take?
2What costs are covered by the study, and what might I have to pay for myself, including travel, parking, or time off work?
3What happens during screening, and what happens if the study team confirms I don't meet the criteria after those tests?
4Who pays for the scans, blood work, and other tests the trial requires — the study, my insurance, or me?
5How will being in the trial affect my regular care, and will my own doctor stay informed and involved?
6Can I leave the trial at any point if I change my mind, and what would happen to my care if I do?

A starting point for the conversation — always confirm anything about your own eligibility, costs, and care with the study team and your doctor.

What they're measuring

rs6746030 SNP in SCN9A genotyping

Timeframe: At day 1, at baseline

Trial details

NCT IDNCT07012382

SponsorJamia Millia Islamia

Sponsor typeOTHER

Study typeINTERVENTIONAL

Primary completion2025-11-27

View on ClinicalTrials.gov More Pulpitis - Irreversible trials