It was demonstrated in vitro that it is possible to achieve obturation
of the root canal system with a system utilizing a reduced pressure o
f 15 hPa (15 mbar). The purpose of this study was to develop a procedu
re to reach a vacuum of at least 15 hPa within root canals in vivo. It
was also determined if root canals could be obturated in daily practi
ce with this vacuum technique. After hand instrumentation of the root
canals a tooth was prepared for obturation of the canals with the new
technique by obtaining a tightly fitting attachment to a vacuum pump.
The result showed that it was possible in vivo to reach reduced absolu
te pressures of 10 hPa in roots and to fill the root canal system with
the new system.