Apical and Coronal Leakage of Calcium Phosphate Cement Root Canal Fillers Compared with Usual Sealers -- A New Study Design

*2680 Apical and Coronal Leakage of Calcium Phosphate Cement Root Canal Fillers Compared with Usual Sealers -- A New Study Design*
J.F. SCHIRRMEISTER¹, J. SCHULTE-MÖNTING¹, and A.M. KIELBASSA², ¹ Universität Freiburg, Germany, ² Freie Universität Berlin, Germany Objectives: The aim of this study was to assess both the coronal and the apical leakage of AH Plus, Sealapex, Ketac-Endo, Hermetic and three biocompatible experimental calcium phosphate based sealers (experimental sealer I, II and III). Dye penetration was compared using a new study design. Methods: Three standardized artificial canals (ISO #70; length 14 mm) were prepared in each one of 140 blocks of bovine root dentine. The roots were divided into seven groups with 20 teeth each. The 60 canals of each group were filled with one of the seven used sealers in combination with gutta-percha. One canal of each tooth block was filled with the single-cone-technique, the second with the Thermafil-obturator and the third using the lateral condensation technique. The roots were placed into 100 % humidity at 37 °C for seven days. After clearing the teeth, maximum linear dye penetration was measured apically and coronally using a stereo microscope and an interactive image processing software. Results: In consideration of all seven sealers no significant differences between the three filling techniques were shown in the coronal area. Apically, the single cone technique exhibited a significantly higher dye penetration than the lateral condensation technique (p<0.01), and dye penetration was significantly higher than with the Thermafil-system (p<0.001; Wilcoxon). Differences between the different sealers were depending on the obturation techniques. In summary, with the exception of the experimental sealer II, all tested sealers were able to seal the artificial canals sufficiently. The new study-design performed very well for comparison of root canal filling materials and techniques. Conclusion: Because of the already proven biocompatibility of the experimental sealers a successful clinical performance of the experimental sealers I and III can be expected.
Seq #271 - Properties of Endodontic Materials 11:00 AM-12:15 PM, Saturday, 28 June 2003 Svenska Massan Exhibition Hall B
Back to the Dental Materials: VIII - Others-Non-metallic Program Back to the 81st General Session of the International Association for Dental Research (June 25-28, 2003)
Top Level Search