Christian R Gernhardt1, Kartin Bekes, Hans-Günter Schaller. 1. Department of Operative Dentistry and Periodontology, Martin Luther University Halle-Wittenberg, Halle, Germany. christian.gernhardt@medizin.uni-halle.de
Abstract
OBJECTIVE: This paper presents the results of an investigation focusing on the retention of all-ceramic posts. The aim of the study was to evaluate the influence of two luting agents--a glass-ionomer cement (Ketac Cem) and a resin cement (Panavia F)--on the retention of a prefabricated ceramic post (Cerapost) after different pretreatment techniques in vitro. METHOD AND MATERIALS: Forty freshly extracted incisors and canines were treated endodontically. The root canals were filled with laterally condensed gutta-percha and sealer. The teeth were assigned to 1 of 4 groups, each containing 10 specimens: sandblasted/nonsandblasted post cemented with glass-ionomer cement and sandblasted/nonsandblasted post cemented with resin cement. Tensile tests were carried out. The specimens were also quantitatively analyzed under a scanning electron microscope. RESULTS: The retentive strengths of posts, sandblasted and nonsandblasted, and cemented with Panavia F resin cement, were significantly increased as compared to those cemented with Ketac Cem. CONCLUSION: Both the luting agent and the post-surface pretreatment had a significant influence on the retention of the ceramic post.
OBJECTIVE: This paper presents the results of an investigation focusing on the retention of all-ceramic posts. The aim of the study was to evaluate the influence of two luting agents--a glass-ionomer cement (Ketac Cem) and a resin cement (Panavia F)--on the retention of a prefabricated ceramic post (Cerapost) after different pretreatment techniques in vitro. METHOD AND MATERIALS: Forty freshly extracted incisors and canines were treated endodontically. The root canals were filled with laterally condensed gutta-percha and sealer. The teeth were assigned to 1 of 4 groups, each containing 10 specimens: sandblasted/nonsandblasted post cemented with glass-ionomer cement and sandblasted/nonsandblasted post cemented with resin cement. Tensile tests were carried out. The specimens were also quantitatively analyzed under a scanning electron microscope. RESULTS: The retentive strengths of posts, sandblasted and nonsandblasted, and cemented with Panavia F resin cement, were significantly increased as compared to those cemented with Ketac Cem. CONCLUSION: Both the luting agent and the post-surface pretreatment had a significant influence on the retention of the ceramic post.