The fracture behavior of premolar teeth with class II cavities restored by both direct composite restorations and endodontic post systems
作者： F.P. Nothdurft , E. Seidel , F. Gebhart , M. Naumann , P.J. Motter
DOI: 10.1016/J.JDENT.2008.03.004
关键词: Post and core 、 Glass fiber 、 Composite number 、 Glass ionomer cement 、 Premolar 、 Resin cement 、 Fatigue testing 、 Materials science 、 Dentistry 、 Fracture (geology) 、 General Dentistry
摘要: Abstract Purpose The aim of the study was to evaluate influence different posts on fracture load and mode endodontically treated premolars with class II cavities direct composite restorations in an ex vivo setting. Methods Forty-eight single-rooted human were prepared standardized MO (mesio-occlusal) cavities. Eight teeth each received either no or restored titanium screws (BKS), glass fiber (DentinPost), quartz (DT Light SL). Sixteen zirconium dioxide (CeraPost). BKS-screws eight cemented conventionally ionomer cement; Panavia F resin cement used for all others. specimens restorations. sound served as controls. After thermomechanical fatigue testing, samples loaded until occurred at angle 45°. All evaluated lines. Results showed significant highest (792.50 ± 210.01 N). group differed not significantly from control. In groups higher values without posts. did show a more favorable than other groups. Clinical significance use intraradicular post can increase resistance towards extra-axial forces.
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