title: Comparison of the cleaning efficacy of a new apical negative pressure irrigating system with conventional irrigation needles in the root canals.
abstract: OBJECTIVE
  This study evaluated the efficacy of EndoVac system in comparison with that of a conventional needle irrigation method when the root canals were enlarged to various sizes.
  
  
  METHODS
  Sixty-nine single-rooted teeth were divided into 3 groups according to the root canal irrigation system (24G and 30G needle and EndoVac). Each group was divided into 3 subgroups according to the MAF size (#25, #40, and #60). Four-micron-thick serial sections were prepared at 1.5 and 3.5 mm from the apical level and photographs were taken for the analysis. The influence of the irrigation system and apical size was evaluated using a 1-way ANOVA test and Tukey's test (P < .05).
  
  
  RESULTS
  At both levels, significant differences were detected between EndoVac system and conventional needle irrigation in removing debris (P < .05). The relationship between the MAF size and irrigation efficacy was found to have a positive relationship (P < .05).
  
  
  CONCLUSIONS
  EndoVac left significantly less debris behind than the conventional needle irrigation methods. Although all 3 irrigation methods resulted in clean root canals because the percentage occupied by remaining debris was very low in our specimens, larger apical instrumentation seemed to improve apical root canal debridement.
authors.affiliation: Department of Oral Biology and Oral Science Research Center, College of Dentistry, Yonsei University, Seoul, South Korea.
authors.forename: Su-Jung
authors.initials: SJ
authors.lastname: Shin
authors.forename: Hee-Kyoung
authors.initials: HK
authors.lastname: Kim
authors.forename: Il-Young
authors.initials: IY
authors.lastname: Jung
authors.forename: Chan-Young
authors.initials: CY
authors.lastname: Lee
authors.forename: Seung-Jong
authors.initials: SJ
authors.lastname: Lee
authors.forename: Euiseong
authors.initials: E
authors.lastname: Kim
mesh_terms: D000704:Analysis of Variance; D003646:Debridement / Q000295:instrumentation / Q000379:methods; D003762:Dental Instruments; D003786:Dental Pulp Cavity / Q000601:surgery*; D006801:Humans; D007180:Incisor; D012388:Root Canal Irrigants / Q000008:administration & dosage*; D018915:Root Canal Preparation / Q000295:instrumentation* / Q000379:methods; D016369:Smear Layer; D018709:Statistics, Nonparametric; D007507:Therapeutic Irrigation / Q000295:instrumentation* / Q000379:methods; D019227:Tooth Apex / Q000601:surgery; D014618:Vacuum
chemical_list: D012388:Root Canal Irrigants