E Villota’s research while affiliated with University of Concepción and other places

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Publications (1)


Human teeth with periapical pathosis after overinstrumentation and overfilling of the root canals: A scanning electron microscopic study
  • Article

February 1999

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72 Reads

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64 Citations

International Endodontic Journal

J.H. Gutiérrez

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E Villota

The aim of this study was to determine whether overinstrumentation followed by immediate overfilling could be a potential risk in the treatment of infected root canals. Thirty-five human teeth with infected root canals were overinstrumented and overfilled approximately 45 min after their extraction. The experimental teeth were enlarged up to size 40 and the overinstrumentation and overfilling were checked with the aid of a magnifying glass. The specimens were fixed in glutaraldehyde plus sodium cacodylate solution and prepared for scanning electron microscope examination. Bacteria were detected on the flute of the files and mostly at the root apices around the main foramen, remaining firmly attached to resorptive lacunae despite the fact that the apices had undergone great changes, including fracture or zipping. A control group consisting of 10 human teeth root canals containing vital pulps were also overinstrumented and overfilled. No bacteria were detected on the flutes of the files, at the apices or on the extruded master cone overfilling these samples. The high percentage of bacteria adhering to the resorptive lacunae or in the flutes of files used in overinstrumented human teeth with infected root canals carry a potential risk for postoperative pain, clinical discomfort and flare-ups. The hazards observed in these circumstances do not support the one-visit treatment of teeth having acute or chronic periapical abscesses.

Citations (1)


... This suggests that the apical preparation limit plays a more significant role in bacterial extrusion than the instrument's kinematics. Based on our findings, extending root canal instrumentation by 1 mm beyond the apical foramen could potentially pose a greater risk to treatment outcomes, regardless of the instrument's kinematics, and may contribute to treatment failure [27]. In asymptomatic chronic periradicular lesions, there exists a delicate balance between microbial aggression and host defense mechanisms [28]. ...

Reference:

Do instrument kinematics and the apical preparation limit influence canal disinfection and bacterial extrusion?
Human teeth with periapical pathosis after overinstrumentation and overfilling of the root canals: A scanning electron microscopic study
  • Citing Article
  • February 1999

International Endodontic Journal