COMPARISON OF THE TIME REQUIRED FOR ULTRASONIC REMOVAL OF PREFABRICATED INTRARADICULAR POSTS

Abstract

Aim: To measure in vitro and compare the time nec-essary for ultrasonic removal of different prefabricatedstainless steel and fiber posts, cemented with one and thesame resin cement. Methodology: Thirty extracted human teeth wererandomly distributed into three groups (n=10) - passivestainless steel, screwed and fiber ones. All posts were fixedwith resin cement and lately treated with piezoelectricscaler, without water spray cooling, until their final removal.The time for definitive post dislodgement was measuredwith a chronometer. Results: Statistical analysis showed significant dif-ference (p=0.001) between the mean time values for re-moval of tested posts. We found out considerable differencesbetween measured time for passive stainless-steel andscrewed posts (p=0.003) and passive stainless-steel and fiberposts (p=0.004) and insignificant for screwed stainless-steeland fiber posts (p=0.684). Conclusion: The shortest time for removal of pre-fabricated intraradicular posts was for screwed posts, fol-lowed by fiber and passive stainless steel ones.