Read before the Midwestern Component of the Angle Society, January, 1977.

From the Departments of Pediatric Dentistry and Orthodontics, University of Connecticut Health Center, Farmington, Connecticut 06032.

From the Departments of Oral and Maxillofacial Surgery, the Universities of Washington and North Carolina, and John Peter Smith Hospital, Fort Worth, Texas.

This research was supported in part by U.S.P.H.S./N.I.H. Grant Number DE-04478-01 and U.S.P.H.S./N.I.H. Grant Number DE00040-01.

Based on a master thesis, The Ohio State University, March 1977.

Given at the January, 1977 meeting of the Midwestern Component of the Angle Society.

From the Department of Orthodontics, Government Dental College and Hospital, Ahmedabad, Gujarat-India.

This investigation was supported by research grant HD 10861 from the National Institute of Child Health and Human Development, Bethesda, Md.

Presented at the January 1977 meeting of the Midwestern component of the Angle Society.