improved device, consisting of a particular tube, act as penetration limiter instruments endodontici, p

摘要

this found is concerned with a particular tube perfected, applicable to endodontici instruments used for the devitalization of teeth.which has various lengths and is provided with, in correspondence of its upper part, a pair of springs.as a device for centering and restraint for instruments endodontici, and ring elements or cappellotti, applied to the upper end of the hollow cylindrical elements.