Read at the January, 1974 meeting of the Midwestern Component of the Angle Society.

Presented at the twentieth biennial meeting of the Edward H. Angle Society, Boca Raton, Florida, October 1973.

From the Department of Orthodontics and Dental Research Institute, University of Michigan, Ann Arbor, Michigan.

This study was supported, in part, by Grant No. NIDR SR01-DE 03013-06.

Presented before the Midwestern Component of the Edward H. Angle Society, January 1974, Chicago.

From the Dental School, London Hospital, London, England.

From the Departments of Orthodontics and Removable Prosthodontics, Ohio State University, Columbus, Ohio.

Given at the January 1974 meeting of the Midwestern Component of the Angle Society.

From the Dental Research Institute and Veterans Administration Hospital, University of Michigan, Ann Arbor, Michigan.