Middle mesial canal in mandibular molars: follow-up of a clinical case by means of computed tomography

Maria Antonieta Veloso Carvalho de Oliveira, Paula Leandro Parreiras Carvalho, Cristiane Melo Caram, Letícia Duarte Alves

Introduction: The location and cleaning of the middle mesial canal (MM canal) is important for the successful endodontic treatment in mandibular molars. Objective: The aim was to evaluate the endodontic retreatment of a mandibular molar presenting MM canal, which was monitored by clinical, radiographic and tomographic assessments. Clinical case: Patient with previous satisfactory endodontic treatment in tooth 36 presented fistula, periodontal pocket and furcation lesion next to mesial root. Retreatment was performed by using ultrasound device with straight edge for removal of filling material and for irrigation, oscillatory instrumentation (Reciproc) and operating microscope, which allowed the location and cleaning of the MM canal. Intracanal medication of calcium hydroxide was exchanged for three months and the canals were filled by Tagger Hybrid technique. After 17 months of follow-up the tooth presented radiographic and tomographic images compatible with bone formation and absence of signs and pathological symptoms. Conclusion: The operating microscope and computed tomography are tools that should be used routinely by endodontists to detect structures such as MM canals in the mandibular molars, which are difficult to find through conventional clinical examination. In addition, the use of activated irrigation by ultrasound device was essential for the location and cleaning of the MM canal.

Keywords: Cone-Beam Computed Tomography. Molar. Root canal preparation.

How to cite: Oliveira MAVC, Carvalho PLP, Caram CM, Alves LD. Middle mesial canal in mandibular molars: follow-up of a clinical case by means of computed tomography. Dental Press Endod. 2016 May-Aug;6(2):63-9. DOI: http://dx.doi.org/10.14436/2358-2545.6.2.063-069.oar

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