 This paper builds upon previous articles by developing a model for horizontal inter-arch relations, refining horizontal descriptions through orthodontic and dental prosthetic models, and estimating potential overbite based on tooth thickness and angles of maxillary teeth. The paper also derives principles to predict change in overjet and overbite during and after orthodontic treatment, and highlights the limitations of observing one or two features of anterior occlusion without considering other significant measurements such as spacing, crowding, buccal relations, and tooth thickness. A better understanding of anterior dental relations can be achieved through the use of this model and its derived principles. This article was authored by Cordotta Marquet.