Ferrario V F, Sforza C, Colombo A, Miani A, D'Addona A
Faculty of Medicine, University of Milan, Italy.
Int J Adult Orthodon Orthognath Surg. 1993;8(4):277-85.
The position and asymmetry of all permanent teeth (right second molar to left second molar) were studied in 50 men and 45 women aged 20 to 27 years with sound dentitions. The centers of gravity of the occlusal surfaces of teeth were individualized on dental casts. The maxillary arch distances between homologous teeth were all larger than the mandibular arch distances regardless of gender. Arches in women were found to be significantly smaller than arches in men. On average, arches were symmetric with mean indexes ranging from 0.28% to 4.57%. Results demonstrated that a certain degree of morphological asymmetry may be considered a normal finding.
对50名年龄在20至27岁、牙列健康的男性和45名女性的所有恒牙（从右第二磨牙到左第二磨牙）的位置和不对称性进行了研究。在石膏模型上确定了牙齿咬合面的重心。无论性别，同源牙齿之间的上颌牙弓距离均大于下颌牙弓距离。发现女性的牙弓明显小于男性的牙弓。平均而言，牙弓是对称的，平均指数范围为0.28%至4.57%。结果表明，一定程度的形态不对称可被视为正常现象。
