NCT03917121.

Trial name or title	Pain control of needle‐free versus needle injected LA for pulpotomy of upper primary molars in children
Methods	Study design: randomised trial, parallel design Country: Egypt
Participants	Inclusion criteria: apparently healthy (classified as American Society of Anesthesiologists (ASA) I); vital deeply carious maxillary first primary molars indicated for pulpotomy; no previous dental experience; co‐operative behaviour (rating 3 or 4 on Frankl category rating scale) Exclusion criteria: refuse to give assent to participate or have parents/caregivers refusing to sign the informed consent form Estimated number of participants to be enrolled: 46 Elligible age range: 6 to 8 years
Interventions	Group 1: jet anaesthesia Group 2 (control): conventional infiltration anaesthesia
Outcomes	Pain during pulpotomy: score on Faces Pain Scale‐Revised and score on Sound, Eyes, and Motor (SEM) scale Pain during injection: score on Faces Pain Scale‐Revised and score on Sound, Eyes, and Motor (SEM) scale Need for additional anaesthesia: recorded as a binary (yes/no) outcome
Starting date	August 2019
Contact information	Lobna S Mohamed (lobna_mohamed@dentistry.cu.edu.eg) Mariam M Aly (mariam.mohsen@dentistry.cu.edu.eg)
Notes