title: Influence of moisture on the apical seal of root canal fillings with five different types of sealer.
abstract: The aim of this study was to evaluate the influence of moisture on apical leakage using five different types of sealer. There were 120 single-rooted teeth instrumented to .02/#60 and randomly assigned to 10 experimental groups, one control group (AH Plus, lateral condensation) (n = 10) or positive/negative controls (n = 5). Before obturation teeth were dried thoroughly, followed by recontamination with moisture in a wet chamber (moist groups; 37 degrees C for 7 days). The teeth of the experimental groups (a, dry; b, moist) were obturated with sealer (groups 1, AH Plus; 2, Apexit; 3, Ketac-Endo; 4, RoekoSeal; 5, Tubli-Seal) and a single gutta-percha cone .02/#55. Teeth were centrifuged (30 x g for 3 minutes) in 5% methylene blue. Linear dye penetration was measured under a stereomicroscope. Moisture led to less microleakage for Apexit, RoekoSeal, and Tubli-Seal and higher values for AH Plus and Ketac-Endo. Multifactorial ANOVA displayed a significant dependence of leakage on sealer (p < 0.001) and the combination sealer or moisture (p < 0.01). It depends on the sealer type in which way moisture affects the apical seal.
authors.affiliation: Dental Clinic 1-Operative Dentistry and Periodontology, University Erlangen-Nuremberg, Erlangen, Germany. mrogge@dent.uni-erlangen.de
authors.forename: Matthias Johannes
authors.initials: MJ
authors.lastname: Roggendorf
authors.forename: Johannes
authors.initials: J
authors.lastname: Ebert
authors.forename: Anselm
authors.initials: A
authors.lastname: Petschelt
authors.forename: Roland
authors.initials: R
authors.lastname: Frankenberger
mesh_terms: D000704:Analysis of Variance; D003763:Dental Leakage; D006801:Humans; D012387:Root Canal Filling Materials / Q000737:chemistry*; D012390:Root Canal Therapy; D018709:Statistics, Nonparametric; D014867:Water / Q000009:adverse effects*
chemical_list: D012387:Root Canal Filling Materials; D014867:Water