title: Microbial leakage evaluation of the continuous wave of condensation.
abstract: Coronal leakage has been recognized as a cause of pulpal and periradicular disease. Although cleaning and shaping of the root canal system is considered paramount, obturation of the system is an important step in endodontic success. The purpose of this study was to evaluate coronal bacterial leakage in teeth obturated with the System B continuous wave of condensation technique, followed by an Obtura II backfill, versus teeth obturated using the lateral condensation technique. Sixty single-rooted bilaterally matched teeth were evaluated in this study. An anaerobic bacterial leakage model was used. Results indicate that microbial coronal leakage occurs more quickly using lateral condensation than with the System B continuous wave of condensation and Obtura II backfill. This difference was statistically significant (p < or = 0.05). However, there was no statistical difference between groups 1 and 2 in the numbers of teeth that demonstrated bacterial leakage at the end of the study.
authors.affiliation: Department of Endodontology, Oregon Health Sciences University School of Dentistry, Portland 97201, USA.
authors.forename: H L Jay
authors.initials: HL
authors.lastname: Jacobson
authors.forename: Tian
authors.initials: T
authors.lastname: Xia
authors.forename: J Craig
authors.initials: JC
authors.lastname: Baumgartner
authors.forename: J Gordon
authors.initials: JG
authors.lastname: Marshall
authors.forename: William J
authors.initials: WJ
authors.lastname: Beeler
mesh_terms: D016022:Case-Control Studies; D002614:Chelating Agents / Q000627:therapeutic use; D016009:Chi-Square Distribution; D003763:Dental Leakage / Q000382:microbiology*; D003786:Dental Pulp Cavity / Q000382:microbiology*; D004202:Disinfectants / Q000627:therapeutic use; D004492:Edetic Acid / Q000627:therapeutic use; D006171:Gutta-Percha / Q000627:therapeutic use; D006801:Humans; D007711:Klebsiella pneumoniae / Q000254:growth & development; D012387:Root Canal Filling Materials / Q000627:therapeutic use; D012388:Root Canal Irrigants / Q000627:therapeutic use; D012389:Root Canal Obturation / Q000295:instrumentation / Q000379:methods*; D018915:Root Canal Preparation / Q000295:instrumentation / Q000379:methods; D012973:Sodium Hypochlorite / Q000627:therapeutic use; D018709:Statistics, Nonparametric
chemical_list: D002614:Chelating Agents; D004202:Disinfectants; D012387:Root Canal Filling Materials; D012388:Root Canal Irrigants; D006171:Gutta-Percha; D004492:Edetic Acid; D012973:Sodium Hypochlorite