Abstract
Needleless local anesthesia systems are emerging as effective alternatives to conventional needle based techniques, particularly in dentistry and pediatric care. Traditional local anesthesia is often associated with needle phobia, anxiety, and risks such as needlestick injuries and intravascular injections. This review evaluates the mechanisms, clinical efficacy, safety, and future potential of needleless modalities including jet injectors, iontophoresis, and augmented topical anesthetics. Evidence from recent randomized controlled trials and systematic reviews (2020-2026) demonstrates that these systems provide anesthesia comparable to conventional injections while significantly reducing pain perception and improving patient acceptance. Jet injectors offer rapid onset and high success rates, especially in maxillary procedures, whereas
iontophoresis and enhanced topical systems are useful for superficial anesthesia with superior comfort in children. Although limitations such as higher costs, technique sensitivity, and inconsistent performance in dense tissues remain, ongoing advances in microneedles, nanotechnology, and AI-assisted delivery systems are expanding their clinical potential. Overall, needleless local anesthesia represents a promising, patient centered advancement capable of improving procedural comfort, safety, and accessibility in modern healthcare.
Publication Date: 2026-06-13