Orthodontics and Orthodontology Commons^™

The Development Of A Means Of Applying Extraoral Pressure To The Buccal Arch Positioner, David C. Hobson

Loma Linda University Electronic Theses, Dissertations & Projects

A problem common to all of the full-banded orthodontic techniques currently in use is the delivery of an optimum force to each tooth without disrupting the forces on other teeth. This problem becomes especially acute during finishing. It arises out of Newton's third law, which states that for every action, there is an equal and opposite reaction. Thus, in full-banded techniques, a force on one tooth gives rise to generally undesirable reactive forces on other teeth in its vicinity.

The theory behind the buccal arch positioner (BAP) is dissipation of the force on any one tooth over every other tooth …

A Cephalometric Study Of Mandibulo-Facial Disostosis In Monozygotic Twins Using Computerized Methods, Lyn M. Lamberton

Loma Linda University Electronic Theses, Dissertations & Projects

An investigation using computerized cephalometrics has been conducted to consider the cephalometric factors responsible for the characteristic appearance evident in individuals afflicted with Mandibulo-Facial Dysostosis. A pair of Negro monozygotic affected twins were studied using the other 10 non-affected members of the family as a control to minimize the environmental and hereditary factors. The Rocky Mountain Data System was utilized to analyze the lateral and frontal cephalometric radiographs of each individual using Ricketts Analysis and the data were subjected to statistical tests to determine the factors contributory to the syndrome. Age and size were considered and adjustments were made to …

Cephalometric Norms For The Mexican Population Using The Ricketts, Steinar, And Tweed Analyses, Eduardo A. Velarde

Loma Linda University Electronic Theses, Dissertations & Projects

In order to investigate the characteristics of the facial complex of the Mexican and to compare them with the Caucasian, a sample of 40 subjects, 31 males and nine females, of Latin American origin from Chihuahua, Chihuahua, Mexico, with a mean age of 16.6 years, were selected for this study. The criteria for selection were visual and only individuals with clinical normal, Angle Class I occlusion were chosen.

Lateral head Roentgenograms were obtained and cephalometric evaluation of the Skeletal and Dental Pattern was carried out using the Ricketts, Steiner, and Tweed Analyses.

The mean values for the Mexican were compared …