Gaspersic D
Faculty of Medicine, Department of Stomatology, Ljubljana, Slovenia.
J Oral Rehabil. 1994 Nov;21(6):713-9.
To increase the understanding of the incisors crown form, the lingual fossa depth, crown width and crown thickness between lingual marginal ridges of the permanent maxillary centrals were measured on 257 stone casts of Slovene children. The right-left, male-female differences, as well as the correlations between the variables themselves were analysed. Male centrals exhibited wider and thicker crown compared to female centrals, while the lingual fossa depth showed no sex differences. A positive correlation in terms of positive allometry between lingual fossa depth and crown width was established. A negative lingual fossa depth-crown thickness correlation was found with female left centrals. High right-left symmetry was established, except for the directional asymmetry of all three measured variables on female centrals. The results indicate that the positive correlation in terms of positive allometry between the thickness of the lingual marginal ridges and the crown width is one of the basic principles of the crown formation for the permanent maxillary centrals. Usually we have to work with absolute thickening of the lingual marginal ridges because relative thickening on the account of the crown thickness is less usual. The latter possibility is less favourable for the firmness of the dental crown.
为了加深对恒上颌中切牙牙冠形态的理解，对257例斯洛文尼亚儿童的石膏模型测量了其舌侧窝深度、牙冠宽度以及舌侧边缘嵴之间的牙冠厚度。分析了左右差异、男女差异以及各变量之间的相关性。男性中切牙的牙冠比女性中切牙更宽更厚，而舌侧窝深度无性别差异。舌侧窝深度与牙冠宽度之间建立了正异速生长的正相关关系。在女性左侧中切牙中发现舌侧窝深度与牙冠厚度呈负相关。除了女性中切牙所有三个测量变量的方向不对称外，建立了高度的左右对称性。结果表明，舌侧边缘嵴厚度与牙冠宽度之间正异速生长的正相关关系是恒上颌中切牙牙冠形成的基本原则之一。通常我们必须考虑舌侧边缘嵴的绝对增厚，因为由于牙冠厚度导致的相对增厚不太常见。后一种可能性对牙冠的坚固性不太有利。
