Similar results were reported by Chan in 1993, as well as Tjan and Schwartz in 1992 and 1998. In these studies they informed of substantial retention loss in resin-cemented posts, in those cases where canals were contaminated with eugenol.
Tjan y Schwartz, en 1992 y 1998, reportaron pérdida sustancial de retención de los postes cementados con resina cuando los canales estaban contaminados con eugenol.