title: Resistance of Hydraulic Calcium Silicate Cements to Dislodgment in Short- and Long-term Assessment.
abstract: OBJECTIVE
  To investigate the resistance to dislodgment produced by Biodentine (Septodont) and White-MTA (Angelus) after immersion in phosphate-buffered saline (PBS) for different durations.
  
  
  METHODS
  Dentin disks 1 ± 0.1 mm thick were obtained from the middle third of the roots of 6 human maxillary canines. On the coronal surface of each dentin disk, four 0.8-mm-diameter holes were drilled. Then the slices were halved using a low-speed saw diamond disk, and the two holes in each half were filled with one of the two tested materials. Each filled half was immersed in PBS solution (pH 7.2) either for 7 days (short term) or 60 days (long term) at 37°C. The push-out test was performed after both time periods. A general linear model (GLM) for repeated measures ANOVA was used to verify the effect of the material and duration of contact with PBS on the push-out strength. The material was considered as the within-subject contrast and the contact duration as the between-subjects effect (p < 0.05).
  
  
  RESULTS
  Repeated measures GLM indicated a significant impact of material and time on the push-out strength of the samples (p = 0.000 and p = 0.033, respectively). Biodentine significantly improved the push-out strength compared to MTA at both times (p = 0.000). The lack of significance in the interaction between material and time indicates that PBS immersion positively influenced the push-out values of both tested materials.
  
  
  CONCLUSIONS
  Long-term PBS immersion positively influenced the resistance to dislodgement from dentin of all cements tested. The Biodentine cement provided greater resistance to push-out force than did the MTA.
authors.forename: Gustavo
authors.initials: G
authors.lastname: De-Deus
authors.forename: Caroline Baptista
authors.initials: CB
authors.lastname: Ferreira
authors.forename: Diogo da Silva
authors.initials: Dda S
authors.lastname: Oliveira
authors.forename: Thais Fernandes
authors.initials: TF
authors.lastname: de Queiroz
authors.forename: Erick Miranda
authors.initials: EM
authors.lastname: Souza
authors.forename: Cresus Vinicius Depes
authors.initials: CV
authors.lastname: de Gouvêa
authors.forename: Emmanuel João Nogueira Leal
authors.initials: EJ
authors.lastname: Silva
mesh_terms: D001729:Bismuth / Q000737:chemistry; D017610:Calcium Compounds / Q000737:chemistry*; D001840:Dental Bonding; D003738:Dental Cements / Q000737:chemistry; D003786:Dental Pulp Cavity / Q000648:ultrastructure; D003799:Dental Stress Analysis / Q000295:instrumentation; D003804:Dentin / Q000648:ultrastructure; D006801:Humans; D007101:Immersion; D008422:Materials Testing; D010087:Oxides / Q000737:chemistry; D011897:Random Allocation; D012823:Silicate Cement / Q000737:chemistry*; D017640:Silicates / Q000737:chemistry*; D012965:Sodium Chloride / Q000737:chemistry; D013314:Stress, Mechanical; D013696:Temperature; D013997:Time Factors
chemical_list: D017610:Calcium Compounds; D003738:Dental Cements; C475480:MTA-Angelus; D010087:Oxides; D017640:Silicates; D012823:Silicate Cement; C506393:tricalcium silicate; D012965:Sodium Chloride; C031293:calcium silicate; D001729:Bismuth