[Technic for recovery of instruments fractured in the root canal, using cyanoacrylate cement (in vitro)]. / Técnica de recuperación de instrumentos fracturados dentro del conducto radicular, por medio del uso de cemento de cianoacrilato (in vitro).

A technique for retrieving and extracting mental fragments from root canals is presented, in which adhesives of cyanoacrylate esters are applied by dripping through hypodermic needles with their bevel edges previously trimmed in two sharp, angled slopes to facilitate cutting through the dentine around the metal fragment imbedded in the root canal, and prepared with high and low-speed funneled burrs. Besides being simple to handle, this technique has the advantage of employing equipment which is easy to acquire and construct.