Sinus tract adjacent to teeth, or near the apex of any particular tooth, is usually considered to be of endodontic origin and root canal therapy is the primary treatment to achieve its healing; however, at times, it may be associated with periodontal lesion and then requires combined endodontic periodontal treatment. The present case had a sinus tract of combined orthodontic-periodontal origin, mimicking pulpal etiology. Such cases can possibly be diagnosed and treated only after careful evaluation of clinical features and radiographic findings.
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