Nasal spray anesthesia may work as well as injections for dental procedures, study shows

One of the most dreaded experiences at the dentist's office is an injection into the tissues of the mouth to numb an area requiring a painful dental procedure.

http://www.buffalo.edu/ubreporter/campus.host.html/content/shared/university/news/ub-reporter-articles/stories/2013/nasal-spray.detail.html

Nasal spray anesthesia may work as well as injections for dental procedures, study shows

"Injections also carry the possibility of exposure to blood-borne pathogens via needle stick; the risk that the anesthesia may not be effective; and injury or tenderness after the procedure."

http://www.buffalo.edu/news/releases/2013/07/033.html