An improved safety hypodermic syringe for dental applications which further includes first finger grip, preferably a thumb ring, on the end of the plunger, forward finger holders and a lock mechanism, which includes extending fingers for grasping the top of the reciprocal sliding sheath. The syringe...http://www.google.fr/patents/US8029279?utm_source=gb-gplus-shareBrevet US8029279 - Safety dental syringe
