Digital radiograph registration and subtraction: a useful tool for the evaluation of the progress of chronic apical periodontitis

Journal of Endodontics
Georgios MikrogeorgisIoannis Pitas

Abstract

The purpose of this study was to evaluate the suitability of a digital radiograph registration and subtraction software for a sensitive and reliable assessment of the progress of chronic apical periodontitis. Ninety cases of teeth with chronic apical periodontitis have been studied. In each case, a preoperative radiograph was taken, root canals were prepared, and a Ca(OH)2 paste was placed in the root canals. Radiographic control and replacement of Ca(OH)2 paste took place at 15-day intervals. The root canals were obturated 1.5 months after the first appointment. Recall radiographs were taken 0.5, 1.5, 3, 6, and 12 months after the obturation. All radiographs were taken for each case under constant conditions by using a direct digital radiography system. In each case, the preoperative, postoperative, and control and recall radiographs were digitally registered and pairwise subtracted. The resulting images were further processed by using contrast enhancement and pseudocoloring methods. Changes to the periapical tissue structure were easily detectable by using the above-mentioned methodology, even during short time intervals.

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Citations

Jul 19, 2011·Dental Traumatology : Official Publication of International Association for Dental Traumatology·Georgios StephanopoulosKleoniki Lyroudia
Dec 12, 2017·Australian Endodontic Journal : the Journal of the Australian Society of Endodontology Inc·Georgios MikrogeorgisIoannis Pitas
Apr 25, 2012·Journal of Clinical Imaging Science·B S DeepakD B Nandini
May 5, 2012·Dental Traumatology : Official Publication of International Association for Dental Traumatology·Elizane Ferreira HamanakaChristine Men Martins
Nov 28, 2012·International Endodontic Journal·C C HuangC M Chen
Jan 26, 2008·International Endodontic Journal·E KostiT Lambrianidis
Apr 12, 2011·Dental Traumatology : Official Publication of International Association for Dental Traumatology·Lars Andersson, Jens O Andreasen
Dec 15, 2020·Australian Endodontic Journal : the Journal of the Australian Society of Endodontology Inc·Aihemaiti GulibireZitong Lin

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