Masseter muscle position relative to dento-skeletal elements

DEPARTMENT

OF REVIEWS

AND

ABSTRACTS

Edit&% by DE. J. A. SALZYASX, 811 inquiries

:l;CW )‘CidL (;it{f

regarding

information on reviews and abstracts should be directed to the respective a&hors. Articles or book for review in this department should be addressed to Dr. J. A. Salzmann, 654 Vadiswn Ave., Sew York. ?im York 10011.

Abstracts of papers presented before the Research Section of the American Association of Orthodontists, St. Louis, MO., April 26, 1967

The

Growth-Stimulating Anterior Pituitary

Effects Extract

By John Arnold DesEnfants, of Dentistry, St. Louis, MO.

Produced

by

D.D.S., MS.,

Mandibular

Joint

Washington

Injections

University

of

School

Anterior pituitary extract was injected into the mandibular joint region of the rabbit in an attempt to increase condylar growth rate. In six male white rabbits, 7 weeks of age, bilateral injections and lateral cephalometric roentgenographs were made initially and at 10 day intervals over a period of 60 days. Data from subsequent cephalometric tracings were employed to assess the local and systemic changes resulting from the injections of pituitary extract. These data were compared to changes observed in a series of control rabbits. The comparison of experimental and control group data indicated an increased mandibular growth rate in the experimental animals. A similar increase in growth rate of the maxillary complex was also evident. A comparison of changes in total body weight indicated a systemic effect resulting from the experimental procedures.

Masseter

Muscle

By Dannell of Dentistry,

Position

Relative

to Dento-Skeletal

Elements

Donald Petersen, D.D.S., M.S., Washington Xt. Louis, MO.

University

School

Modification of cephalometric roentgenographic techniques provided a means of visualizing the masseter muscle as well as dental and skeletal structures on 72