Abstract
The aim of the study was to examine the influence of the state of the pulp and apical periodontium on the results of electronic root canal length measurement (ERCLM) with a resistance measuring device in dogs. Pulpitis and apical periodontitis were induced by pulp exposure and contamination by the oral flora in the premolar teeth of six mongrel dogs, comprising four experimental groups (36 root canals). In a control group, measured lengths of teeth with uninfected pulps were performed on the first experimental day (44 root canals). In all animals the ERCLMs were performed on teeth with healthy pulps, and at the end of the experimental period (20, 35, 50 and 65 days) following pulp exposure. The point of measuring canal lengths was the anatomical obstacle above the apical delta. Electronically measured lengths (EML) were compared between each other and with the root canal length established by tactile-sense measurement verified radiographically. The EMLs were less accurate in teeth with healthy pulps and teeth with pulpitis in the third experimental group (dif = 2.27 × 2.65 mm2; t test, p < 0.05), while they were most precise after 65 days in teeth with completely necrotic pulp and established chronic apical periodontitis (dif = 0.54 × 1.36 mm2; t test, p > 0.05). These results suggest that the state of the pulp and periapical tissue may have an influence on the ERCLM.
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Acknowledgments
The authors are grateful to Mrs. Snježana Šimac and Mrs. Marija Mršić, Department of Anatomy, Medical Faculty, University of Rijeka, for their assistance during the laboratory procedures of the experiment. We also wish to thank Prof. Ratko Zelenika, PhD, Head of Department of General Economic theory, Faculty of Economics, University of Rijeka, for his assistance in the preparation of the manuscript.
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Kovacevic, M., Tamarut, T., Glavičić, S. et al. Electronic root canal length measurement before and after experimentally induced pulpitis and apical periodontitis in dogs. Med Bio Eng Comput 44, 695–701 (2006). https://doi.org/10.1007/s11517-006-0076-7
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DOI: https://doi.org/10.1007/s11517-006-0076-7