1Sergl, H. G.and Stodt, W.: Experimental investigation on the aesthetic effect of various tooth positions after loss of an incisor tooth. Trans Europ Orthod Soc. PP. 497-506, 1970.
2Zachrisson, B. V. and Mjor, I. A.: Remodeling of teeth by grinding.Am J Orthodont 1975; 68:545-554,1975.
3Tuverson, D. L.: Orthodontic treatment using canines in place of missing maxillary Iateral incisors. Am J Orthodont 1970;58:109-127.
4Tuverson, D. L.: Anterior interocclusal relations. Parts Ⅰ and Ⅱ. Am J Orthodont. 1980;78:361-393.
