Effect of the diameter on Cu-Al post retention

Filho, Celso Bernardo de Souza; Paulino, Silvana Maria; Alfredo, Edson; Neto, Manoel Damião de Sousa; Vansan, Luíz Pascoal

doi:10.1590/s1806-83242004000300011

Cited by 2 publications

(1 citation statement)

References 19 publications

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“…22 Concerning the techniques available for radicular post cementation, several studies have attempted to explain the divergent results found in literature regarding the bond strength they provided. 2,5,9,12,14,21,24,25 Recently, Carvalho et al 4 (2004) and Alfredo et al 2 (2005) reported that the success in retention of cores and intracanal posts cemented with adhesive agents depend on a conjunction of factors including root canal preparation and operative procedures, specially the application method of the adhesive system and luting agent.…”

Section: Introductionmentioning

confidence: 99%

Retention of radicular posts varying the application technique of the adhesive system and luting agent

et al. 2006

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This study evaluated in vitro the retention of intracanal cast posts cemented with dual-cure resin varying the application method of the primer/adhesive solution and luting agent in the prosthetic space prepared to receive the posts. Sixty endodontically treated maxillary canines had their crowns discarded, and their roots were embedded in acrylic resin. The prosthetic spaces were prepared with Largo burs mounted on a low-speed handpiece coupled to a parallelometer in order to maintain length and diameter of intraradicular posts constant and to guarantee that the preparations were parallel after casting. Two groups (n = 30) were randomly formed according to the device used to apply the adhesive system: microbrush or standard bristle brush (control). Each group was divided into 3 subgroups (n = 10) according to the technique used to place the luting agent into the root canal: using only a lentulo spiral before setting the post, applying it onto the post surface, or combining both methods. After 72 hours, the tensile force required to dislodge each post was determined by a universal testing machine (Instron 4444) set at a speed of 1 mm/min. The results indicated that the use of the microbrush yielded higher bond strength values (0.1740 +/- 0.04 kN) than those recorded for the bristle brush tip (0.1369 +/- 0.04 kN, p < 0.001). Bonferroni's test demonstrated a higher retention (p < 0.001) in radicular post cemented with the technique that combined both methods (lentulo + post: 0.1787 +/- 0.03 kN) than that obtained with lentulo (0.1461 +/- 0.065 kN) or post (0.1416 +/- 0.03 kN) alone. The interactions between the adhesive system and luting agent application techniques presented statistical difference (p < 0.001). It was concluded that the best performance in terms of tensile strength among the tested conditions was obtained when the adhesive system was applied with a microbrush and the luting agent was taken into the root canal with lentulo spirals alone (0.1961 +/- 0.04 kN) and combining both methods (lentulo + post: 0.1911 +/- 0.02 kN).

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Section: Introductionmentioning

confidence: 99%

Retention of radicular posts varying the application technique of the adhesive system and luting agent

et al. 2006

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Influence of core-finishing intervals on tensile strength of cast posts-and-cores luted with zinc phosphate cement

et al. 2012

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The core finishing of cast posts-and-cores after luting is routine in dental practice. However, the effects of the vibrations produced by the rotary cutting instruments over the luting cements are not welldocumented. This study evaluated the influence of the time intervals that elapsed between the cementation and the core-finishing procedures on the tensile strength of cast posts-and-cores luted with zinc phosphate cement. Forty-eight bovine incisor roots were selected, endodontically treated, and divided into four groups (n = 12): GA, control (without finishing); GB, GC, and GD, subjected to finishing at 20 minutes, 60 minutes, and 24 hours after cementation, respectively. Root canals were molded, and the resin patterns were cast in copper-aluminum alloy. Cast posts-and-cores were luted with zinc phosphate cement, and the corefinishing procedures were applied according to the groups. The tensile tests were performed at a crosshead speed of 0.5 mm/min for all groups, 24 hours after the core-finishing procedures. The data were subjected to one-way analysis of variance (ANOVA) and Tukey's test (α = 0.05). No significant differences were observed in the tensile strengths between the control and experimental groups, regardless of the time interval that elapsed between the luting and finishing steps. Within the limitations of the present study, it was demonstrated that the core-finishing procedures and time intervals that elapsed after luting did not appear to affect the retention of cast posts-and-cores when zinc phosphate cement was used.

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Effect of the diameter on Cu-Al post retention

Cited by 2 publications

References 19 publications

Retention of radicular posts varying the application technique of the adhesive system and luting agent

Retention of radicular posts varying the application technique of the adhesive system and luting agent

Influence of core-finishing intervals on tensile strength of cast posts-and-cores luted with zinc phosphate cement

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