AMERICAN ASSOCIATION OF ORTHODONTISTS

Research Council presents twenty-two theses in special AA0 session

R eports on twenty-two exceptional research investigations will be presented at the MaJ 7 2 to 6 meeting of the American Association of Ortho- dontists in New Orleans. Th’ey were submitted from fifteen widely scattered American and Canadian dent,al schools, and they cover critical areas that ultimately will increase the quality of clinical orthodontic treatment.

The AA0 Council on Research has the responsibility of mantaining a research section at the Association’s annual meetings. It also acts as the “judge of the Milo Hellman Award Essay contest and of the First Research Essay Award.” Its primary duty is to “promote, support, and collect infor- mation on the means and methods of improving and fostering research” and to encourage research seminars and publication of theses related to ortho- dontics.

The Council on Research is composed of one member from each of the eight AA0 constituent societies. The 1970-71 Council members are Coenraad F. A. Moorrees (chairman), Harry L. Dougherty, James E. Harris, Robert B. Hedges, Elbert W. King, William R. Proffit, Sheldon W. Rosenstein, and Albert P. Westfall.

The Council will be conducting its most extensive annual program at the New Orleans AA0 meet,ing. The sessions will take place all day Monday, May 3, in Rooms 14, 15, and 16 at the Rivergate Convention Cent,er. The 19’71 meeting has been organized in collaboration with t.he International Society of Craniofacial Biology. The research program follows :

Monday, May 3, Convention Center

Coenraad F. A. Moorrees, Chairman, presiding

9:OO Secondary Cartilage: A Misnomer? James F. Durkin, Forsyth Dental Center-Harvard School of Dental Medicine, winner of Milo Hellman Research Award.

9:30 Dental Arch Form Related With Intraoral Forces. Allen C. Brader, Temple University, recipient of Milo Hellman Research Award of Special Merit.

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9:40 A Longitudinal Study of Mandibular Growth Changes in Girls at Puberty. Maria I. Tofani, University of Pittsburgh, recipient of First Research Essay Award of Special Merit.

1O:OO The Center for Human Growth and Development. Donald H. Enlow, University of Michigan.

lo:05 Some Recent Developments in the Computerization of Craniofacial Growth Data.

Michael L. Riolo, University of Michigan. lo:15 A Biomathematical Approach to Craniofacial Form.

William J. Hirschfeld, University of Michigan. lo:30 Studies of Adaptation to Experimental Change in Form and Growth of

the Rhesus Monkey. James A. McNamara, University of Michigan.

lo:45 Discussion-University of Michigan Papers. Elbert W. King, presiding. 11:OO Epidemiological Principles Employed in the Compilation and Analysis

of the Burlington Growth Centre Data. Gordon W. Thompson and Frank Popovich, University of Toronto.

11: 15 Tests of Validity for Indices of Occlusion. Chester J. Summers, University of Michigan.

11:30 The Effects of Thumb-Sucking on Facial Morphology in the Macaca Mulatta.

James D’Anna, University of Washington. 11:45 Effects of Phosphated Acidulated Fluoride on Caries Susceptibility of

Orthodontic Patients. William R. Wells, University of Tennessee.

Coenraad F. A. Moorrees, presiding

1:OO Occlusal and Skeletal Disharmonies, Cooperation and Duration of Ortho- dontic Therapy.

John M. Grewe, University of Maryland. 1:45 Changes in Tongue Position Related to Surgical Orthodontic Procedures.

Nann Wickwire, University of Kentucky. 1:30 Analysis of Periodontal Stresses in Reaction to Typical Orthodontic Forces,

With Special Attention to Variations Across the Ligament Thickness. Donald C. Haack, University of Nebraska.

2:00 Neurotrophic Influences on Oro-Facial Growth. Melvin L. Moss, Columbia University.

2:30 In Vitro Bone Formation in a Controlled Electrical Field. Louis A. Norton, University of Kentucky.

James E. Harris, presiding

250 Experimental Studies of Malocclusion. Egil P. Harvold, University of California (San Francisco).

3:lO Experimental Alterations in the Temporalis Muscle of the Rat. Frans J. M. Huijbregts, University of Utrecht (The Netherlands) and Columbia University.

3:30 Quantitating Investigative Procedures. Rick Byll and John F. Cleall, University of Manitoba.

4:00 Development of Mandibular Spacing-Crowding From Nine to Sixteen Years of Age.

W. Stuart Hunter and Bryan R. W. Smith, University of Western Ontario. 4:15 Influence of Vitamin D on the Periodontium During Tooth Movement.

Kirby Guidry and Robert J. isaacson, University of Minnesota. 4:45 Hormonal Effects on Orthodontic Tooth Movement in Cats.

Zeev Davidovitch, Davic Musich, and Marion Doyle, University of Penn- sylvania and University of Nebraska.

If any man can convince me and bring home to me that I do not think or act aright, gladly will I change; for I search after truth, by which man never yet was harmed. (Marcus Aurelius, A.D. 121.180, Meditations, VI, 21.)