Behavior of resin-based endodontic sealer cements in thin and thick films

Dental Materials : Official Publication of the Academy of Dental Materials
Epita S PaneH H Messer

Abstract

For root canal fillings, a thin layer of sealer cement is generally recommended. However, with resin-based sealers, lower bond strength to dentin has been shown in thin layers compared to thick, contrary to typical behavior of adhesive layers between two adherents. The aim of this study was to evaluate tensile and shear bond strength of thin and thick films of three resin-based sealers (one epoxy-based and two methacrylate-based) materials and to investigate corner effects of one methacrylate-based resin sealer. Freshly mixed sealer cements were placed between metal-to-metal surfaces of plano-parallel stainless steel aligned rods with diameter 4.7 mm. Ten samples were prepared for each type, thickness (0.1 and 1.0 mm) of sealer and test. Tensile and shear strengths were measured after 48 h for the methacrylate-based materials and after 7 days for the epoxy-based material using a universal testing machine at a crosshead speed of 1mm/min. Corner effects were investigated using one methacrylate-based resin material. Film thickness had a highly significant influence on both tensile and shear strengths. For methacrylate resin-based sealers, thin films had higher bond strength than thick (p<0.001 for both tensile and shear bond stren...Continue Reading

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Citations

May 8, 2015·Australian Endodontic Journal : the Journal of the Australian Society of Endodontology Inc·Epita S PaneHarold H Messer
Apr 7, 2016·Brazilian Oral Research·Vanessa Lessa AraújoRicardo Gariba Silva
Nov 7, 2017·Dento Maxillo Facial Radiology·Fernanda Clotilde Mariz SuassunaPatrícia Meira Bento
Dec 28, 2018·Journal of Materials Chemistry. B, Materials for Biology and Medicine·Hoon YiHoon Eui Jeong
Dec 11, 2020·Journal of Oral Science·Shinya YamauchiTakashi Okiji

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