title: In vitro evaluation of bond strength and sealing ability of a new low-shrinkage, methacrylate resin-based root canal sealer.
abstract: OBJECTIVE
  The aim of this study was to evaluate a new low-shrinkage, methacrylate resin-based root canal sealer (LSRCS) to determine its bond strength in radicular dentin and sealing ability.
  
  
  METHODS
  Extracted single-root teeth were randomly divided into three experimental groups (n=20) for obturation with Gutta-percha (GP)/AH Plus, Resilon/Epiphany, or Resilon/LSRCS. One-half of each experimental group was analyzed by the push-out test, using sections perpendicular to the long axis divided into 1mm serial slices and a universal testing machine to detect the loading force. The other half was analyzed by the dye penetration test using 2% methylene blue solution (pH=7) and measuring dye leakage under a stereomicroscope.
  
  
  RESULTS
  The push-out test revealed significant differences (p<0.05) in bond strength produced by the three sealers; the GP/AH Plus group showed the highest bond strength, followed by Resilon/LSRCS and Resilon/Epiphany. According to the microleakage data, GP/AH Plus showed the least dye penetration, which was significantly less than Resilon/Epiphany and Resilon/LSRCS. There was no difference in apical leakage between Resilon/Epiphany and Resilon/LSRCS.
  
  
  CONCLUSIONS
  The newly developed LSRCS, although not superior to AH Plus in bond strength or sealing ability, possesses monoblock potential and application prospects.
authors: Department of Stomatology, Huantai Branch, Qilu Hospital of Shandong University, Shandong 256400, China.
authors: Junyan
authors: J
authors: Fang
authors: Sui
authors: S
authors: Mai
authors: Junqi
authors: J
authors: Ling
authors: Zhengmei
authors: Z
authors: Lin
authors: Xiangya
authors: X
authors: Huang
mesh_terms: D004396:Coloring Agents; D004853:Epoxy Resins; D006801:Humans; D066298:In Vitro Techniques; D055595:Mechanical Phenomena; D008689:Methacrylates; D008751:Methylene Blue; D008855:Microscopy, Electron, Scanning; D012117:Resins, Synthetic; D012387:Root Canal Filling Materials / Q000737:chemistry; D016474:Weight-Bearing
chemical_list: D004396:Coloring Agents; D004853:Epoxy Resins; D008689:Methacrylates; D012117:Resins, Synthetic; D012387:Root Canal Filling Materials; C486893:epiphany sealer; C534916:epoxy resin-based root canal sealer; D008751:Methylene Blue