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Evaluation of the apical infiltration after root canal disruption and obturation
Gomes-Filho, João Eduardo; Hopp, Renato Nicolás; Bernabé, Pedro Felício Estrada; Nery, Mauro Juvenal; Otoboni Filho, José Arlindo; Dezan Júnior, Elói.
  • Gomes-Filho, João Eduardo; State University of São Paulo. Dental School of Araçatuba. Department of Endodontics. Araçatuba. BR
  • Hopp, Renato Nicolás; State University of São Paulo. Dental School of Araçatuba. Department of Endodontics. Araçatuba. BR
  • Bernabé, Pedro Felício Estrada; State University of São Paulo. Dental School of Araçatuba. Araçatuba. BR
  • Nery, Mauro Juvenal; State University of São Paulo. Dental School of Araçatuba. Department of Endodontics. Araçatuba. BR
  • Otoboni Filho, José Arlindo; State University of São Paulo. Dental School of Araçatuba. Department of Endodontics. Araçatuba. BR
  • Dezan Júnior, Elói; State University of São Paulo. Dental School of Araçatuba. Department of Endodontics. Araçatuba. BR
J. appl. oral sci ; 16(5): 345-349, Sept.-Oct. 2008. tab
Article in English | LILACS | ID: lil-495139
ABSTRACT
The aim of this study was to evaluate two root canal filling techniques used in teeth that had their apical foramen disrupted and compare the apical infiltration with an ideal clinical situation. Twenty-seven freshly extracted single-rooted teeth were selected and radiographed to confirm the existence of a single and straight root canal. The crowns were removed at a mean distance of 11 mm from the apex. The teeth had the root canals instrumented and were randomly assigned to 3 groups (n=9) ND group - root canals were filled using the lateral compaction technique and no disruption was performed; DRF group - the apical constriction was disrupted by advancing a #40 K-file 1 mm beyond the original working length, the canals were reinstrumented to create an apical ledge at 1 mm from the apical foramen and were obturated with a master gutta-percha cone with same size as the last file used for reinstrumentation; DF group - the teeth had the apical constriction disrupted and the canals were obturated with a master gutta-percha cone that fit at 1 mm from the apex. The teeth were submitted to dye leakage test with Rhodamine B for 7 days, using vaccum on the initial 5 min. The teeth were sectioned longitudinally and the leakage was measured in a linear fashion from apex to crown. There was no statistically significant difference (p>0.05) between the groups that had the apical foramen disrupted (DF, DRF), but significant difference was found between the disrupted groups and the non-disrupted one (p<0.01). In conclusion, none of the evaluated techniques was able to prevent apical infiltration, so working length so the working length determination has to be established and maintained carefully.
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Full text: Available Index: LILACS (Americas) Main subject: Root Canal Obturation / Root Canal Preparation / Tooth Apex / Dental Leakage Type of study: Etiology study / Evaluation studies Limits: Humans Language: English Journal: J. appl. oral sci Journal subject: Dentistry Year: 2008 Type: Article Affiliation country: Brazil Institution/Affiliation country: State University of São Paulo/BR

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Full text: Available Index: LILACS (Americas) Main subject: Root Canal Obturation / Root Canal Preparation / Tooth Apex / Dental Leakage Type of study: Etiology study / Evaluation studies Limits: Humans Language: English Journal: J. appl. oral sci Journal subject: Dentistry Year: 2008 Type: Article Affiliation country: Brazil Institution/Affiliation country: State University of São Paulo/BR