title: The use of 30 gauge needles for the administration of local anaesthetic in North American dental schools.
mesh_terms: D000766:Anesthesia, Dental / Q000295:instrumentation*; D000772:Anesthesia, Local / Q000295:instrumentation*; D002170:Canada; D006801:Humans; D009339:Needles; D012575:Schools, Dental; D014481:United States