title: Influence of QMix irrigant on the micropush-out bond strength of biodentine and white mineral trioxide aggregate.
abstract: OBJECTIVE
  To evaluate the effect of QMix and other conventional endodontic irrigants on the micropush-out bond strength of Biodentine (BD) and white mineral trioxide aggregate (WMTA).
  
  
  METHODS
  One hundred eighty midroot dentin slices with a thickness of 1.0 mm were prepared. BD and WMTA were placed inside the lumens of the root slices (n = 90). Then the specimens of each material were divided into 6 groups (n = 15) according to irrigation solution (saline, 5.25% NaOCl, 2% CHX, 17% EDTA, or QMix) immersed in the same for 30 min. For the control group, a wet cotton pellet was placed over the specimen. After that, the micropush-out bond strength was determined using a universal testing machine, and the bond failure mode was determined using a stereomicroscope. The morphological microstructures of specimens were evaluated with scanning electron microscopy (SEM). Data were analyzed using ANOVA and Tukey's post-hoc test.
  
  
  RESULTS
  BD revealed higher bond strength than WMTA (p < 0.05). WMTA was significantly affected after exposure to 2% CHX solution. QMix irrigant did not compromise the bond strength of BD or WMTA. Most failures for BD were cohesive, while for WMTA, adhesive failures were the predominant type. A substantial change in the microstructure of BD and WMTA occurred after exposure to different irrigation solutions.
  
  
  CONCLUSIONS
  QMix did not affect the bond strength of BD or WMTA. BD showed higher resistance than WMTA to dislodgement forces from root dentin.
authors.forename: Amr M
authors.initials: AM
authors.lastname: Elnaghy
mesh_terms: D000268:Adhesiveness; D017607:Aluminum Compounds / Q000737:chemistry*; D001645:Biguanides / Q000737:chemistry*; D017610:Calcium Compounds / Q000737:chemistry*; D002710:Chlorhexidine / Q000737:chemistry; D001840:Dental Bonding; D003786:Dental Pulp Cavity / Q000648:ultrastructure; D003799:Dental Stress Analysis / Q000295:instrumentation; D003804:Dentin / Q000648:ultrastructure; D004338:Drug Combinations; D004492:Edetic Acid / Q000737:chemistry; D006801:Humans; D006813:Humidity; D008422:Materials Testing; D008855:Microscopy, Electron, Scanning; D010087:Oxides / Q000737:chemistry*; D011108:Polymers / Q000737:chemistry*; D012387:Root Canal Filling Materials / Q000737:chemistry*; D012388:Root Canal Irrigants / Q000737:chemistry*; D017640:Silicates / Q000737:chemistry*; D012965:Sodium Chloride / Q000737:chemistry; D012973:Sodium Hypochlorite / Q000737:chemistry; D013314:Stress, Mechanical; D013499:Surface Properties; D013696:Temperature; D013997:Time Factors
chemical_list: D017607:Aluminum Compounds; D001645:Biguanides; D017610:Calcium Compounds; D004338:Drug Combinations; D010087:Oxides; D011108:Polymers; C557698:QMix root canal irrigant; D012387:Root Canal Filling Materials; D012388:Root Canal Irrigants; D017640:Silicates; C086631:mineral trioxide aggregate; C506393:tricalcium silicate; D012965:Sodium Chloride; D004492:Edetic Acid; D012973:Sodium Hypochlorite; D002710:Chlorhexidine