Retention of Root Canal Posts: Effect of Cement Film Thickness, Luting Cement, and Post Pretreatment

Operative Dentistry
A SahafiA Peutzfeldt

Abstract

The aim of this study was to investigate the effect of the cement film thickness of a zinc phosphate or a resin cement on retention of untreated and pretreated root canal posts. Prefabricated zirconia posts (CosmoPost: 1.4 mm) and two types of luting cements (a zinc phosphate cement [DeTrey Zinc] and a self-etch adhesive resin cement [Panavia F2.0]) were used. After removal of the crowns of 360 extracted premolars, canines, or incisors, the root canals were prepared with a parallel-sided drill system to three different final diameters. Half the posts did not receive any pretreatment. The other half received tribochemical silicate coating according to the manufacturer's instructions. Posts were then luted in the prepared root canals (n=30 per group). Following water storage at 37°C for seven days, retention of the posts was determined by the pull-out method. Irrespective of the luting cement, pretreatment with tribochemical silicate coating significantly increased retention of the posts. Increased cement film thickness resulted in decreased retention of untreated posts and of pretreated posts luted with zinc phosphate cement. Increased cement film thickness had no influence on retention of pretreated posts luted with resin cemen...Continue Reading

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Citations

Feb 19, 2019·Journal of Dental Research, Dental Clinics, Dental Prospects·Farzaneh FaridMohammadJavad Kharazifard
May 8, 2018·Dental Materials : Official Publication of the Academy of Dental Materials·Adriana Lemos Mori UbaldiniAnne Peutzfeldt

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