title: Penetration of 27- and 30-gauge dental needles.
abstract: Two types of disposable injection needles were tested clinically for pain of insertion, and penetration resistance. The 30-gauge needle required significantly less force (69 mN) than the 27-gauge needle (139 mN). The difference in pain perception was less remarkable. The author advises that a 30-gauge needle be used in any infiltration injection.
mesh_terms: D004209:Disposable Equipment; D006801:Humans; D007267:Injections / Q000295:instrumentation; D009339:Needles; D010146:Pain / Q000503:physiopathology