Ragavendran N, Bhat Ganesh T, Hegde Mithra N
Department of Conservative Dentistry and Endodontics, A. B. Shetty Memorial Institute of Dental Sciences, Mangalore, Karnataka, India.
J Pharm Bioallied Sci. 2014 Jul;6(Suppl 1):S182-4. doi: 10.4103/0975-7406.137461.
Mandibular first molar commonly has two roots, the mesial and the distal root. Surprisingly in some mandibular first molar has an unusual extra third root in between mesial and distal root. This extra root is the most commonly seen in lingual side and is called as radix entomolaris. If this extra root is seen on the buccal side, it is termed as radix paramolaris (RP), which is a very rare phenomenon. Recently, various case report studies has shown the presence of third canal in the mesial and distal roots of mandibular molars. They are named as middle mesial and middle distal canal, respectively. Here, we present a case report of mandibular second molar showing three canals in the mesial root and a RP.
下颌第一磨牙通常有两个牙根，即近中根和远中根。令人惊讶的是，一些下颌第一磨牙在近中根和远中根之间有一个不寻常的额外第三根。这个额外的根最常见于舌侧，被称为磨牙内根。如果这个额外的根出现在颊侧，则被称为磨牙旁根（RP），这是一种非常罕见的现象。最近，各种病例报告研究表明下颌磨牙的近中根和远中根存在第三根管。它们分别被命名为近中中间根管和远中中间根管。在此，我们报告一例下颌第二磨牙近中根有三个根管和一个磨牙旁根的病例。
