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Comparison of different concentrations of nitrous oxide gas in reducing pain during dental injections in children

Evaluation of pain perceived during local anesthesia administration with different concentrations of nitrous oxide sedation in preadolescent children: A randomized crossover trial - NIL

Status
Active, not recruiting
Phases
Unknown
Study type
Interventional
Source
CTRI
Registry ID
CTRI/2025/09/094000
Enrollment
34
Registered
2025-09-01
Start date
Unknown
Completion date
Unknown
Last updated
2025-09-15

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

Conditions

Health Condition 1: Z012- Encounter for dental examination and cleaning

Interventions

Intervention1: Arm A: 30% Nitrous oxide: Dose/Concentration: 30% Nitrous oxide with 70% Oxygen Route of Administration: Inhalation via nasal hood Frequency: Single administration per dental visit Tota

Sponsors

Charanya S
Lead Sponsor

Eligibility

Inclusion criteria

Inclusion criteria: Children aged seven to twelve years requiring treatment under local anaesthesia through inferior alveolar nerve block in each visit for three visits. Children with Frankel behaviour rating two. Medically healthy children classified as American Society of Anesthesiologists physical status class one. Children who can understand and follow instructions during the procedure. Children whose parent or guardian have given consent and child assent for participation in the study.

Exclusion criteria

Exclusion criteria: Children with severe anxiety or uncooperative behavior that may require deeper sedation or general anesthesia. History of respiratory conditions such as asthma, upper airway obstruction, or sleep apnea. Neurological or developmental disorders that could affect sedation response such as epilepsy, autism spectrum disorder, or attention deficit hyperactivity disorder. Allergy or hypersensitivity to nitrous oxide or local anesthetic agents. Children with significant nasal congestion or conditions affecting nasal breathing. Recent history of sedative or anxiolytic medication use within the past twenty four hours. Severe gag reflex or conditions making nitrous oxide administration difficult. Children who have undergone recent dental procedures with sedation within the last four weeks.

Design outcomes

Primary

MeasureTime frame
To evaluate the pain perceived at different concentrations of nitrous oxide sedation (30% and 40%) and control (no sedation) during local anesthesia administrationTimepoint: Subjective pain scale scored during administration of local anesthesia injection using Face, Legs, Activity, Cry, Consolability scale. Objective pain scale scored Immediately after completion of local anesthesia injection using Wong Baker faces pain rating scale.

Secondary

MeasureTime frame
To evaluate & compare anxiety levels before & after local anesthesia administration under thirty percent & forty percent nitrous oxide sedation. To determine the depth of sedation achieved with thirty percent & forty percent nitrous oxide. To compare recovery time following dental procedures under different sedation concentrations.Timepoint: Anxiety level by Visual Analogue Scale for Anxiety at baseline before local anesthesia & immediately after injection. Sedation depth by Wisconsin Sedation Scale at five minutes after induction of nitrous oxide oxygen inhalation before local anesthesia. Heart rate & oxygen saturation at baseline, during injection, immediately after, & during recovery every five minutes until complete recovery. Recovery status by Modified Aldrete Score during recovery every five minutes until complete recovery.

Countries

India

Contacts

Public ContactDr Shankar P

SRM Dental College, Ramapuram

shankarp1@srmist.edu.in9884585808

Outcome results

None listed

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