Evaluation of the effects of the VibraJect attachment on pain in children receiving local anesthesia

Pediatr Dent. 2011 Jan-Feb;33(1):46-50.


Purpose: The purpose of this study was to evaluate the effectiveness of VibraJect, a vibrating attachment for a traditional syringe, in reducing pain related disruptive behavior and self-reported pain in children receiving local anesthesia.

Methods: The procedure involved a randomized, controlled, single-blinded study of 90 children receiving local anesthesia for routine restorative procedures. Participants were randomly assigned to either a control (injection as usual) or experimental (injection using the VibraJect) group. Participants were recruited from a large, urban pediatric dental clinic within a university medical center.

Results: Using 2-way analysis of variance and 2-tailed, between-subject t tests, there were no significant differences between injection with and without the VibraJect on any measures of pain, including self-reported intensity, independent direct observations of pain related disruptive behavior, and subjective dentist ratings.

Conclusions: VibraJect did not provide any benefits over a conventional approach to anesthesia injection for children in this study.

Publication types

  • Randomized Controlled Trial
  • Research Support, U.S. Gov't, P.H.S.

MeSH terms

  • Anesthesia, Dental / instrumentation*
  • Anesthesia, Local / instrumentation*
  • Anesthetics, Inhalation / administration & dosage
  • Child
  • Child Behavior
  • Child, Preschool
  • Facial Pain / psychology*
  • Female
  • Humans
  • Injections / instrumentation
  • Male
  • Nitrous Oxide / administration & dosage
  • Pain Measurement
  • Self Report
  • Single-Blind Method


  • Anesthetics, Inhalation
  • Nitrous Oxide