Cordato M A
Aust Orthod J. 1998 Mar;15(2):75-84.
Two previous articles described horizontal interarch relations with a simple model developed. This paper required further development of the horizontal relations to allow vertical overlap to be studied. An analysis of orthodontic and dental-prosthetic models provided values to refine horizontal description then guide vertical calculations. Tooth thickness and angles of the maxillary teeth were related to horizontal overlap to produce an estimate of potential overbite. Principles were derived from the calculations and stated. Change can be predicted for overjet and overbite during and after orthodontic treatment. This series of articles expands the logical foundations by rationally considering a broad range of anterior occlusions. There are limitations in observing one or two features of anterior occlusion without comprehending the influence of other significant measurements. Measuring change in anterior overbite is inadequate without concurrently accounting for changes of other variables such as: spacing/enlarging/hypodontia; crowding; buccal relations and tooth thickness. A better understanding of anterior dental relations is possible from use of this model and the principles derived from it.
之前的两篇文章用一个简单的模型描述了牙弓间的水平关系。本文需要进一步发展水平关系，以便研究垂直覆盖。对正畸模型和义齿修复模型的分析提供了一些数值，用于完善水平关系的描述，进而指导垂直关系的计算。上颌牙齿的厚度和角度与水平覆盖相关，由此得出潜在覆合的估计值。从这些计算中得出原理并进行阐述。正畸治疗期间及之后的覆盖和覆合变化可以预测。这一系列文章通过合理考虑广泛的前牙咬合情况，扩展了逻辑基础。在不理解其他重要测量值影响的情况下，观察前牙咬合的一两个特征存在局限性。如果不同时考虑其他变量的变化，如：间隙/增宽/牙缺失；拥挤；颊侧关系和牙齿厚度，测量前牙覆合的变化是不够的。通过使用这个模型及其衍生原理，可以更好地理解前牙关系。
