Abstract
Among all the causes of root canal failure, incapability to identify and negotiate additional canals is one which is of prime value, from treatment point of view. Mandibular molars display anatomical variations in the form of an additional root located lingually (radix entomolaris) or buccally (radix paramolaris). It is critical to understand the root morphology and canal patterns of teeth indicated for canal treatments for successful treatment outcomes. This case report presents a re-root treatment of a failed root canal treatment of a first molar tooth with Radix Entomolaris. Correct interpretation of angled radiographs and careful examination of the access cavity chamber floor and use of recent concepts in access cavity preparation along with the sound knowledge of the variable anatomy helps clinician to locate and treat the root canals in case of Radix Entomolaris. The findings of the present case report suggests that correct interpretation of angled radiographs and careful examination of the access cavity chamber floor is pivotal in managing Radix Entomolaris. The use of recent concepts in access cavity preparation along with the accurate understanding of variable anatomy helps clinician to locate and treat the root canals in case of Radix Entomolaris