Sinus Tracts from Proximal Roots with Infected Root Canals-Cases Report

Diagnosis of the infection source of a sinus tract is sometimes complex. We present 3 cases of sinus tract originating from infected root canals of neighboring teeth. In case 1, a sinus tract on the buccal gingiva of the right mandibular 2(superscript nd) molar was found to be originated from the necrotic distal root canal of the right mandibular 1(superscript st) molar. In case 2, a sinus tract was found on the buccal furcation area of the right mandibular 2(superscript nd) molar. Tracing the sinus tract by gutta-percha point indicated that the origin was from the distobuccal root of the right mandibular 1(superscript st) molar. In case 3, a sinus tract on the buccal gingiva of the left mandibular 1(superscript st) molar was found to have been derived from an apical lesion of the left mandibular 2(superscript nd) premolar. In all 3 cases, all sinus tracts healed after endodontic treatment. We would like to emphasize that a sinus tract may originate from adjacent teeth with infected root canals. Therefore, radiographic confirmation after tracing the sinus tract with a gutta-percha point may help diagnose the origin of the infection source.

並列關鍵字

ectopic sinus tract ； endodontic diagnosis ； apical periodontitis ； periodontitis ； root proximity

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