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Development Of A Positioning Device For Use In Conjunction With Panoral Radiography, Ray M. Hymer
Development Of A Positioning Device For Use In Conjunction With Panoral Radiography, Ray M. Hymer
Loma Linda University Electronic Theses, Dissertations & Projects
A cephalometric positioning device has been developed for use on the XRM Panorex X-Ray machine. Tests have demonstrated that the variability in producing serial radiographs with this device is comparable to, or less than, that currently accepted in conventional radiographic cephalometry.
Two procedures for obtaining serial radiographs were employed. Two patients were used for the first procedure and three patients were used in the second procedure.
In the first procedure each patient was positioned in the device and two radiographs were taken in sequence without disturbing the patient.
In the second procedure three clinic patients were used as subjects and …
A Cephalometric Comparison Of The Chamula, Mayo And Navajo Indians, Norman C. Bunker
A Cephalometric Comparison Of The Chamula, Mayo And Navajo Indians, Norman C. Bunker
Loma Linda University Electronic Theses, Dissertations & Projects
Lateral head x-rays were obtained on selected samples of 24 Chamula, 29 Mayo and 39 Navajo Indians for cephalometric comparison.
Cephalometric evaluation was carried out by means of the Bjork analysis. Mean values for each of the Indian groups were determined and compared with each other and with the mean values of a group of Swedish conscripts studied by Bjork. The mean values were statistically analyzed and and subjected to the Student's "t" test to determine the significant levels of differences.
Results revealed that in comparing the three Indian groups significant differences do appear. They are few and general concordance …