Influence of different kinds of rosins and hydrogenated resins on the setting time of Grossman cements

Abstract

In this study, the effect on the setting time by the addition of different kinds of rosin and hydrogenated resin on the Grossman cement powder was evaluated. The experiments were carried out following the American Dental Association’s specification number 57 for root canal sealers. For this analysis, different Grossman cement powders were prepared using different rosins (X, WW and WG) and hydrogenated resins (Staybelite and Staybelite ester 10). The study of the physicochemical properties of the Grossman cements obtained the different kinds of rosins and hydrogenated resins interference on the cement’s setting time. The hydrogenated resin, having a higher pH, increased the setting time of the cement when compared to the X, WW and WG rosins.

Laboratory evaluation of the physicochemical properties of a new root canal sealer based on Copaifera multijuga oil‐resin

“…The same conditions of temperature, air humidity and sample thickness were maintained for all tests. The need for standardization of the methodology to study physical properties has been claimed by several other authors (Sousa‐Neto et al. 1998, Versiani et al.…”

“…Biosealer and Endofill ® showed statistically similar expansion values, probably attributed to the presence of rosin in their formulations (22% and 27%, respectively). According to Sousa‐Neto et al. (1998), the presence of rosin (natural resin) in a sealer plays an important role in its expansion, which might also explain the expansion results of the experimental sealer based on Copaifera multijuga oil‐resin.…”

“…The choice of the chemical substances present in the powder of Biosealer was based on their physical and biological properties, after the reaction with the oil‐resin. The resin component, which corresponds to 21.91% of the sealer, is an excellent accelerator of setting time, increases the flow and sealer expansion (Sousa‐Neto et al. 1999b).…”

“…Endofill is a Grossman cement. According to Sousa‐Neto et al. (1999b), the setting reaction of this sealer is attributed to the reaction between the zinc and the eugenol.…”

Micro-CT analysis of filling ability and porosity of root-end filling materials

“…It has excellent sealing properties when used as rootend filling material 15 , and presents interface adaptation similar to calcium silicate-based cements 16 . Zinc oxide and Eugenol cement (ZOE) may also be used with higher powder/liquid proportion 17 , favoring its insertion into root-end cavities.…”