Abstract
Anatomic variations are common in human dentition. A clear understanding of these variations is very important for success of endodontic treatment. A dentist should be aware of these anatomic variations as this can affect the treatment outcome. A case of endodontic therapy is presented in which inability to locate an anatomically rare supplemental canal of a three rooted mandibular first molar resulted in treatment failure. A 21-year-old female reported with pain and swelling in relation to lower right first molar. An intra oral periapical radiograph revealed 3 roots; the first canal of the mesial root and a canal of one of the distal roots were found to be treated endodontically, which were infraobturated but the canal of the 2nd distal root had not been treated. The radiograph revealed periapical radiolucency and widening of periodontal space. Prior to starting the endodontic treatment the clinician must be aware of the anatomic variations in tooth pulp morphology and also the importance of preoperative radiographs cannot be underscored.
Highlights
A clear understanding of the anatomy of human teeth becomes an essential prerequisite for achieving success in endodontic treatment
The report describes a failed case of 3 rooted mandibular first molar in which one canal of the extra root was left unobturated resulting in treatment failure
The 4th canal was left untreated during treatment because periapical radiography was not preformed as the patient was 1 month pregnant at that time
Summary
A clear understanding of the anatomy of human teeth becomes an essential prerequisite for achieving success in endodontic treatment. The presence of an untreated canal may be a reason for failure.[1] The importance of developing a visual picture of the expected locations and number of canals in a particular tooth can't be overstressed. This report describes a failed endodontic therapy on a mandibular first molar with unusual root morphology. The canal in the distolingual root was left untreated during the treatment because no radiographic examination was performed as the patient was 1 month pregnant at that time
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