title: Microbial leakage of Cavit, IRM, and Temp Bond in post-prepared root canals using two methods of gutta-percha removal: an in vitro study.
abstract: The aim of this study was to evaluate the integrity of the coronal seal of Temp-Bond and compare it to Cavit and IRM after post space preparation using S. faecalis as a microbial tracer. In addition, the affect of two methods of gutta percha removal on the apical seal of root canal fillings was also evaluated. Forty extracted human single rooted teeth were prepared chemomechanically and obturated with gutta percha and AH26 sealer cement using the lateral cold condensation technique to a standardized working length of 15 mm. About 10 mm of the coronal gutta-percha was removed with either Peeso-reamer or a hot plugger. The roots were divided into three experimental groups of 10 roots and a control group. Each experimental group was subdivided equally into two groups of 15 each according to the method of post space preparation. Cavit, IRM, and Temp-Bond were used to seal the access opening. Each root was fixed in a cuvette containing Tryptic Soya Broth which, covered 2 mm of the root apex. Bacterial suspension was introduced through pipette. Fresh bacterial suspension was added every week, and the system was monitored daily for the growth of microorganisms for a period of one month. The results showed there was no significant difference in terms of coronal leakage between the three coronal materials used (P=0.478), but the methods of gutta-percha removal did have an impact on the apical leakage (P=0.047). The mean value showed the Peeso-reamer provided less leakage compared to using a hot plugger during the 30-day experimental time period. It was concluded the temporary type of coronal seal of endodontically treated teeth will not prevent coronal leakage if left for a long period of time. In addition, permanent cementation of the post with the coronal restoration should be carried out as soon as possible to prevent recontamination of the root canal.
authors.affiliation: Department of Restorative Dental Sciences in the College of Dentistry at King Saud University Riyadh, Saudi Arabia. hi82000@yahoo.com
authors.forename: Hanan
authors.initials: H
authors.lastname: Balto
authors.forename: Saad
authors.initials: S
authors.lastname: Al-Nazhan
authors.forename: Khulood
authors.initials: K
authors.lastname: Al-Mansour
authors.forename: Moneera
authors.initials: M
authors.lastname: Al-Otaibi
authors.forename: Yunus
authors.initials: Y
authors.lastname: Siddiqu
mesh_terms: D000704:Analysis of Variance; D001641:Bicuspid; D001729:Bismuth; D002133:Calcium Sulfate; D003738:Dental Cements; D003763:Dental Leakage / Q000209:etiology / Q000517:prevention & control*; D003794:Dental Restoration, Temporary / Q000009:adverse effects*; D004338:Drug Combinations; D013293:Enterococcus faecalis; D004853:Epoxy Resins; D005054:Eugenol; D006171:Gutta-Percha; D006801:Humans; D008422:Materials Testing; D008768:Methylmethacrylates; D011145:Polyvinyls; D011176:Post and Core Technique; D012387:Root Canal Filling Materials; D018915:Root Canal Preparation / Q000295:instrumentation / Q000379:methods*; D012834:Silver; D014025:Titanium; D019227:Tooth Apex; D019228:Tooth Crown; D015034:Zinc Oxide; D015035:Zinc Oxide-Eugenol Cement
chemical_list: D003738:Dental Cements; D004338:Drug Combinations; D004853:Epoxy Resins; D008768:Methylmethacrylates; D011145:Polyvinyls; D012387:Root Canal Filling Materials; D015035:Zinc Oxide-Eugenol Cement; D012834:Silver; D005054:Eugenol; C028044:epoxy resin AH-26; C031667:IRM cement; C076899:Temp-Bond; C020872:Cavit; D006171:Gutta-Percha; D014025:Titanium; D015034:Zinc Oxide; D001729:Bismuth; D002133:Calcium Sulfate