CBCT检查发现儿童多颗下颌切牙双根管2例

Double Canals in Several Mandibular Incisors by CBCT:Two Cases Report

下颌切牙萌出早于上颌,易受外力撞击而发生牙外伤。下颌切牙多为单根单管型,本文报道2例儿童牙外伤后应用CBCT检查分别发现4颗和2颗下颌切牙存在根管变异。

Mandibular incisors erupt earlier than maxillary incisors and are prone to dental trauma in children.Generally,mandibular incisors usually have single root and one canal.In this case report,two children are demonstrated double canals in four and two mandibular incisors examined by CBCT respectively.