Anthony HL in his research conducted in 1992, demonstrated the fact that eugenol significantly decreased retention of Parapost cemented with Panavia resin, excepting cases when canals were cleansed with ethylic alcohol or 37% ortho-phosphoric acid was used for one minute. They informed there was no difference among control group and groups in which alcohol and etching acid were used.
Anthony HL, en investigaciones realizadas en 1992, demostró que el eugenol reduce significativamente la retención de ParaPost cementados con resina Panavia, a excepción de cuando se utiliza un lavado intraconducto con alcohol etílico o se emplea ácido ortofosfórico al 37% durante un minuto, reportando que no había ninguna diferencia entre el grupo control y los grupos en los que se empleó alcohol y ácido grabador.