title: Shear bond strength of Biodentine, ProRoot MTA, glass ionomer cement and composite resin on human dentine ex vivo.
abstract: BACKGROUND
  The aim of this study was to compare the shear bond strength of Biodentine, ProRoot MTA (MTA), glass ionomer cement (GIC) and composite resin (CR) on dentine.
  
  
  METHODS
  120 extracted human third molars were embedded in cold-cured-resin and grinned down to the dentine. For each material 30 specimens were produced in standardised height and width and the materials were applied according to manufacturers´ instructions on the dentine samples. Only in the CR group a self-etching dentine-adhesive was used. In all other groups the dentine was not pre-treated. All specimens were stored at 37.5 °C and 100% humidity for 2d, 7d and 14d. With a testing device the shear bond strength was determined (separation of the specimens from the dentine surface). The statistical evaluation was performed using ANOVA and Tukey-test (p < 0.05).
  
  
  RESULTS
  At all observation periods the CR showed the significant highest shear bond strength (p < 0.05). After 2d significant differences in the shear bond strength were detectable between all tested materials, whereby CR had the highest and MTA the lowest values (p < 0.05). After 7d and 14d the shear bond strengths of MTA and Biodentine increased significantly compared to the 2d investigation period (p < 0.05). Biodentine showed a significantly higher shear bond strength than MTA (p < 0.05), while the difference between Biodentine and GIC was not significant (p > 0.05).
  
  
  CONCLUSIONS
  After 7d Biodentine showed comparable shear bond values than GIC, whereas the shear bond values for MTA were significantly lower even after 14d. The adhesion of Biodentine to dentine surface seams to be superior compared to that of MTA.
authors.affiliation: Department of Operative Dentistry, Westphalian Wilhelms-University, Albert-Schweitzer-Campus 1, building W 30, 48149, Münster, Germany. drkaup@drkaup.de.
authors.forename: Markus
authors.initials: M
authors.lastname: Kaup
authors.affiliation: Department of Operative Dentistry, Westphalian Wilhelms-University, Albert-Schweitzer-Campus 1, building W 30, 48149, Münster, Germany. c_damm02@uni-muenster.de.
authors.forename: Christoph Heinrich
authors.initials: CH
authors.lastname: Dammann
authors.affiliation: Central Interdisciplinary Ambulance in the School of Dentistry, Albert-Schweitzer-Campus 1, building W 30, 48149, Münster, Germany. eschaef@uni-muenster.de.
authors.forename: Edgar
authors.initials: E
authors.lastname: Schäfer
authors.affiliation: Department of Operative Dentistry, Westphalian Wilhelms-University, Albert-Schweitzer-Campus 1, building W 30, 48149, Münster, Germany. tillda@uni-muenster.de.
authors.forename: Till
authors.initials: T
authors.lastname: Dammaschke
mesh_terms: D017607:Aluminum Compounds / Q000494:pharmacology*; D017610:Calcium Compounds / Q000494:pharmacology*; D003188:Composite Resins / Q000494:pharmacology*; D001840:Dental Bonding / Q000379:methods*; D003799:Dental Stress Analysis; D003804:Dentin / Q000187:drug effects; D004338:Drug Combinations; D005899:Glass Ionomer Cements / Q000494:pharmacology*; D006801:Humans; D066298:In Vitro Techniques; D008422:Materials Testing; D008964:Molar, Third; D010087:Oxides / Q000494:pharmacology*; D012680:Sensitivity and Specificity; D033081:Shear Strength / Q000187:drug effects*; D017640:Silicates / Q000494:pharmacology*
chemical_list: D017607:Aluminum Compounds; D017610:Calcium Compounds; D003188:Composite Resins; D004338:Drug Combinations; D005899:Glass Ionomer Cements; D010087:Oxides; D017640:Silicates; C086631:mineral trioxide aggregate; C506393:tricalcium silicate