Guerisoli D M, de Souza R A, de Sousa Neto M D, Silva R G, Pécora J D
Disciplina de Endodontia, Faculdade de Odontologia de Ribeirão Preto, Universidade de São Paulo, Brasil.
Braz Dent J. 1998;9(2):91-4.
The external and internal anatomy of 269 third molars (155 maxillary and 114 mandibular) were studied. The teeth were measured, classified according to their root number and shape and the internal anatomy was observed by the use of diaphanization. A great anatomical variability was found, with the presence of up to 5 roots in maxillary third molars and 3 roots in mandibular third molars. The number of root canals followed the same pattern.
对269颗第三磨牙（155颗上颌第三磨牙和114颗下颌第三磨牙）的外部和内部解剖结构进行了研究。对牙齿进行了测量，根据牙根数量和形状进行了分类，并通过透明化处理观察了内部解剖结构。发现了很大的解剖变异，上颌第三磨牙最多有5个牙根，下颌第三磨牙最多有3个牙根。根管数量也呈现相同的模式。
