Prevalence of Middle Mesial Canals and Isthmi in the Mesial Root of Mandibular Molars: An In Vivo Cone-beam Computed Tomographic Study

Journal of Endodontics
Mehrnaz TahmasbiUmadevi P Nair

Abstract

Many studies have investigated the morphology of the mandibular molar, but the prevalence of the middle mesial (MM) canal in the mesial root of the mandibular molar is still the subject of controversy. In addition, in previous literature, a true MM canal has not been clearly distinguished from an isthmus between the mesiobuccal and mesiolingual canals. Therefore, the objectives of this study were 2-fold: METHODS: Ninety limited field of view cone-beam computed tomographic scans were observed. One hundred twenty-two mature mandibular first and second molars with no previous root canal treatment, no root resorption, and intact crowns were retrospectively evaluated. Data regarding the sex, age, presence of MM canals, and number of root canals in the mesial root were recorded. Of the 122 teeth, 20 (16.4%) had true MM canals. The prevalence of MM canals was 26% in first molars and 8% in second molars (P < .05). The frequency of isthmi in the mesial roots was 64.7%. The frequency of isthmi was higher in second molars, but the difference was not statistically significant (P > .05). This study showed a high prevalence of mandibular molars with MM canals or isthmi. The detection and biomechanical cleaning of these areas during nonsurgic...Continue Reading

Citations

Apr 3, 2019·Surgical and Radiologic Anatomy : SRA·Xiaoli HuXiaolei Zhang
Apr 3, 2020·Journal of Applied Oral Science : Revista FOB·Elen de Souza TolentinoMarco Antônio Húngaro-Duarte
Jun 25, 2020·Clinical Case Reports·Takayoshi NagaharaHideki Shiba
Apr 9, 2021·Imaging Science in Dentistry·Elen de Souza TolentinoMarco Antônio Húngaro Duarte
Dec 21, 2021·Australian Endodontic Journal : the Journal of the Australian Society of Endodontology Inc·Usman Anwer BhattiMuhammad Sajid

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