PMC3335526_01
Initial periapical radiograph showing external apical root resorption resulted from the severely curved root of the adjacent premolar.
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Radiographic examination also revealed a sharp curvature located in the middle third of the root canal (Figure 1). The apical third of the root 15 seems to have direct contact with the mesial root of 16 which was shortened severely (Figure 1).
Periapical radiograph taken from the symmetrical region of the maxilla shows no unusual morphology of the teeth.
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A periapical radiograph taken from the symmetrical region in the maxilla exhibited no abnormality in the root shape and morphology of the teeth 25 and 26 (Figure 2).
Postoperative radiograph following root canal treatment of the premolar.
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Trey, Konstanz, Germany). Another periapical radiograph was exposed to check the quality of obturation (Figure 3). The cavity was restored with amalgam.
Reconstructed cone-beam computerized tomography image showing right side of the maxilla.
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IMTEC Imaging, Ardmore, Okla) of the maxilla was performed with a tube voltage of 120 kVp and tube current of 3.8 mA, for better definition and visualization of the root lengths and morphology (Figures 4 and 5). It was confirmed that endodontic treatment of the premolar had been successful, and there was no progression of the external root resorption in the neighbouring molar tooth.
Cone-beam computerized tomography image showing close association between the roots of the maxillary second premolar and first molar.
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IMTEC Imaging, Ardmore, Okla) of the maxilla was performed with a tube voltage of 120 kVp and tube current of 3.8 mA, for better definition and visualization of the root lengths and morphology (Figures 4 and 5). It was confirmed that endodontic treatment of the premolar had been successful, and there was no progression of the external root resorption in the neighbouring molar tooth.