Objective To investigate the clinical discovery and expanding of the second mesiobuccal canal (MB2) in maxillary first molars.
目的探讨在临床上上颌第一磨牙近中颊根第二根管(MB 2)的发现及扩通。
Results Of the 24 maxillary first molars of 20 patients, 14 of the molars had second mesiobuccal root canals.
结果20例患者的24颗上颌第一磨牙中有14颗存在近中颊根第二根管，发现率为58。
Aim To investigate the clinical incidence of the second mesiobuccal root canal of maxillary first molars.
目的研究上颌第一磨牙近中颊根第二根管的临床发现率。
The sagittal inclinations to the palatal plane of the first and second maxillary molars were measured on panoramic tomography.
在曲面断层片上分别测量上颌第一和第二磨牙与腭平面所成的角度。
Results Maxillary first and second molars were more mesially inclined in the first group, particularly in the younger subjects (16 ~ 25 years). This inclination increased with age.
结果上颌第三磨牙萌出组与未萌出组相比，上颌第一磨牙和第二磨牙更向近中倾斜，而且随年龄的增加倾斜度也变大。
The maxillary third molars and maxillary canines are the second and third most common areas of occurrence, respectively.
上颌第三磨牙和上颌尖牙分别是第二及第三常见的部位。
The maxillary third molars and maxillary canines are the second and third most common areas of occurrence, respectively.
上颌第三磨牙和上颌尖牙分别是第二及第三常见的部位。
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