Medicine and Health Sciences Commons^™

Mayo Dental Morphology, Val K. Artress

Loma Linda University Electronic Theses, Dissertations & Projects

The Mayo Indian of Sonora, Mexico, was selected for a study of dental morphology. The objectives of the investigation were to determine the extent to which the Mayo conformed to the four criteria of the Mongoloid dental master pattern, and to compare eight other specific tooth morphologic characteristics with like studies on Mongoloid and non-Mongoloid peoples. Plaster casts were made on a sample of forty-one Mayos.

The results of the study indicate that Mayos exhibit a 46 percent frequency of shovel-shape maxillary incisors, classifying "moderate shovel" and "shovel" together. The maxillary central-lateral width difference of 1.5 mm is small compared …

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 …

The Relationship Of Central Venous Pressure To Hemorrhage In Open Heart Surgery, Mable Reynolds

Loma Linda University Electronic Theses, Dissertations & Projects

The problem of this study was to review 100 open heart surgical cases in a selected hospital to determine the changes occurring in central venous pressure in relation to blood loss.

The review of literature revealed that central venous pressure is an important factor in determining immediate postoperative care of open heart surgical patients. If central venous pressure falls below the normal range of 5 to 10 centimeters of water, hemorrhage is suspected. If central venous pressure is elevated between 15 and 20 centimeters of water, cardiac tamponade is suspected.

The descriptive survey method of research was used. Medical records …

Electromyographic Analysis Of The Temporal And Masseter Muscles During The Para-Retentional Period In Orthodontic Patients, Thomas L. Thompson

Loma Linda University Electronic Theses, Dissertations & Projects

This study was initiated to compare electromyographically the activity of the masseter and temporal muscles during the early retentional period in orthodontic patients. Electromyographic recordings were taken at the following times: (1) before typical edgewise appliance was removed, (2) at time of retainer insertion, (3) after eight to twelve weeks of retainer wearing, and (4) one day following occlusal equilibration. Electromyograms from the orthodontic group of subjects were compared with electromyograms from a group of subjects with normal occlusion, and a group of subjects with untreated Class II, Division 1 malocclusions. There was a total of thirteen subjects studied: five …

Masseter And Temporal Muscle Adaptability To Interproximal Contact Disruption : An Electromyographic Study, Robert E. French

Loma Linda University Electronic Theses, Dissertations & Projects

In this study an attempt was made to determine the amount of interproximal contact disruption necessary to initiate an electromyographically discernable deviation in the masticatory musculature. Ten adult subjects with adjudged normal occlusions were used. An additional study was under taken to determine the time necessary for the right and left temporal and masseter muscles to accommodate this disruption. Myographic recordings were taken of the subjects while closing firmly in centric occlusion and chewing Dentyne gum first on the right side, then on the left.

Contact disruption was accomplished with a metal shim of .003 inch thickness and later in …

Factors Affecting The Rest Of The Hospitalized Cardiac Patient, Julia M. Bensonhaver

Loma Linda University Electronic Theses, Dissertations & Projects

A study was conducted to determine factors which can promote and prevent the rest of the hospitalized cardiac patient. Literature was reviewed in the areas of patients' opinions about their hospitalization and pertinent concepts in medical and nursing literature regarding cardiac rest. A study was not found which polled cardiac patient specifically regarding their ability to rest. Most authorities in this area strongly advocate rest for the cardiac patient, but there is disagreement of how and how long the patient should rest.

A questionnaire was sent to seventy cardiac patients who had been hospitalized in the nine months prior to …

A Study Of Regeneration Of Peripheral Nerve In The Rat, James C. Jay

Loma Linda University Electronic Theses, Dissertations & Projects

Due to improvements in fixation and embedding techniques a restudy of regenerating peripheral nerve was thought advisable in order to better understand and describe the processes which take place.

Femoral nerves of white Wistar rats were used. The lesions were made by either crushing or severing the nerve. After a period of regeneration, varying from 12 hours to six days, the wound was reopened and the injured portion fixed in situ with 1% osmium tetroxide. The tissues were then removed, dehydrated, embedded and sectioned. The sections were stained and studied with a modified RCA EMU2A electron microscope.

Observations revealed that …

The Ultrastructure Of The Choroid Plexus In Vitamin A Deficient Rabbits, Everet W. Witzel

Loma Linda University Electronic Theses, Dissertations & Projects

The fire structure of the lateral choroid plexus in vitamin A deficient hydrocephalic New Zealand white rabbits has been studied with the aid of both light and electron microscopy.

A special Vitamin A deficient diet was fed to all rabbits and control rabbits in addition received orally 12,500 I. U. of vitamin A powder per week. The offspring of does thus maintained for several months were studied.

All rabbits were decapitated; the left lateral choroid plexus was quickly exposed, and subjected to the fixative within 90 seconds following the death of the animal. Conventional techniques of fixation, embedding, and sectioning …

A Comparative Study Of The Salivary Glands Of Certain Animals With Widely Diverse Food Habits, Arthur E. Dalgleish

Loma Linda University Electronic Theses, Dissertations & Projects

A comparative study was made of the salivary glands of six animals with diverse diet and food habits. These consisted of the following species: coyote, bobcat, opossum, kangaroo rat, cow and goat. Correlations were sought between the food habits of the animals and the relative size and microscopic structure of their glands.

After recording the gross weights of the animal and the removed glands, microscopic sections were prepared by the paraffin method. Tissues were stained by routine and special stains, including stains specific for mucins.

The cytology of the different glands and the varied mucin reactions are described. Special attention …

The Nature And Incidence Of Vascular Lesions Of The Brain In 10,000 Consecutive Autopsies, David Hartson

Loma Linda University Electronic Theses, Dissertations & Projects

[Abstract not included]

Diagnostic Abdominal Aspiration In Acute Abdominal Conditions, George Quan Lee

Loma Linda University Electronic Theses, Dissertations & Projects

[Abstract Not Included]

A Study Of Obstructive Jaundice And Drainage Of The Bile Duct System: Presentation Of A New Method Of Pre-Surgical Continuous Drainage Of The Obstructed Bile Duct System, By Transhepatic Percutaneous Catheterization Of An Intrahepatic Bile Duct, Alexander Coblentz

Loma Linda University Electronic Theses, Dissertations & Projects

[Abstract Not Included]

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